Xilin Gol League is at the forefront of the western development and revitalization of the old industrial base in northeast China, and is the main energy base of the nationally planned economic zones of east of Mongolia, west of Liaoning and around the Bohai Sea.
Xilingol League according to the unified planning of the State and the Inner Mongolia Autonomous Region to determine the development of power and coal chemical industry in the pithead as the main lignite development strategy, and the development of power and coal chemical industry need a lot of water.
Xilin Gol League is located in arid and semi-arid areas, sandy winds, low rainfall and high evaporation. Annual rainfall is only 150-350 mm, annual evaporation 2000-2700 mm, the alliance grassland and land sandy area currently reaches 2970 square kilometers, expanding at a rate of 143 square kilometers per year, the alliance *** there are 1,363 lakes, most of which are now dry, a large number of dry lake bottom of the fine dust, sandy land fine sandy dust blown up by the wind, the formation of the Beijing and Tianjin areas of floating dust, sand and dust storms the main source of the Beijing and Tianjin area.
According to the second national water resources assessment data, Xilin Gol League total water resources of 3.492 billion m?/year, the actual amount of water resources available for 1.968 billion m?/year, of which the amount of surface water resources of 398 million m?/year, the amount of underground water resources of 1.634 billion m?/year. According to the national development into the development of the energy [2004] 864 document development of industrial prohibit the use of groundwater. Xilin Gol League can provide only 310 million effective water per year. 2007 total water consumption of the League has reached 298 million m?, "Eleventh Five-Year" period of Xilin Gol League national plan to build the key projects have no water available, and the surrounding areas have no water can be adjusted.
Xilin Gol League to attract seawater desalination recycling economy industrial projects from the Bohai Bay each year to transfer 365 million m?, while the use of the project's annual output of 10 billion cubic meters of lignite gas lignite gas project waste heat steam desalination of seawater, the annual output of 310 million cubic meters of freshwater, to alleviate the pressure on water resources in Ximeng. At the same time the annual output of various types of salt chemical products 11.2 million tons.
The National Development and Reform Commission attaches great importance to the project, the National Development and Reform Commission Development and Reform Office Investment [2007] No. 2785 suggests that starting from the planning, commissioned large-scale comprehensive engineering consulting organizations to fully demonstrate.
The State Council Research Office of the State Council Research Letter [2007] No. 23 document on the Tenth National People's Congress Fifth Session of the 2837 good suggestions in response, pointed out that the implementation of the Xilingol League to introduce desalination of seawater to develop the grassland ecological industry project is of great significance. My room will actively track the implementation of the Department of neighboring countries demon introduction of seawater desalination development of grassland ecological industry project. And the research report will be sent to the State Council leaders and relevant departments for reference.
The Inner Mongolia Autonomous Region Development and Reform Commission within the development of agricultural letter [2007] No. 28 document on the good Xilingol League to introduce seawater desalination integration project preliminary work letter, pointing out that in order to speed up the preliminary work, the early submission of the planning results of the report, please grasp the project's preliminary work.
Xilin Gol League Administrative Office of Ximengol League Office [2007] No. 77 document to set up the project advance work to promote the leading group, to the executive vice ally Wang Zhiyuan as head, the relevant deputy ally and each business director 20 people.
Xilinhot City, Xi-Shi Party issued [2005] No. 40 document set up to the mayor of the Tour Xiaoyang as the leader, the competent departments of the leadership of the project to promote the leadership of the group composed of 19 people play a major role in the implementation of the project.
The Xilinhot Municipal Land and Resources Bureau of Xilinhot City, Xilinhot City, Land and Resources Word [2006] No. 19 document planning for 23 square kilometers of land for seawater desalination and 10 billion cubic meters of artificial natural gas industrial parks occupy the land.
Xilin Gol League Water Conservancy Bureau Xifa [2008] No. 244 document, the document requires: your company to lead the construction of seawater desalination project to solve the problem of water shortages in our alliance is the best way. Hope that your company can implement the project as soon as possible. Industrial development and ecological construction for our alliance to provide water resources support.
Xilin Gol League Development and Reform Commission tin development and reform word [2007] 525 documents, victory east one open-pit mine is located in Xilinhot City, the victory of the coal field in the east-central part. The mine master plan has been approved by the National Development and Reform Commission, is a desalination, coal gasification transmission of Beijing and Tianjin project supporting resources.
According to the spirit of the above documents, Xilin Gol League Hongyuan Seawater Desalination Co., Ltd. organizes 22 large-scale institutes across the country, more than 100 scientists with practical experience to carry out the project's four-year feasibility study, and commissions the China Water North Survey and Design Institute to design the seawater transmission project feasibility study report, China Tianchen Chemical Engineering Company to design the lignite-to-artificial natural gas feasibility study report, and China China Light International Engineering Co. Ltd. to design the feasibility study report of seawater desalination and salt production.
In order to provide the necessary geological and topographical information to the design institute, Xilin Gol League Dazhong Construction Engineering Survey Co., Ltd. has been commissioned to complete the 1:2000 topographical map of the 23-square-kilometer industrial park and the geological drilling work information of the feasibility study stage.
The above work is the actual basic information for the feasibility study of the project.
The main content of the project is the construction of six major projects: namely, the coal chemical project, the seawater desalination and salt production project, the seawater conveyance project of the Bohai-Jixi Seawater, the lignite open-pit coal mine project, the coal processing plant and the gangue power plant.
Six major projects, except for the seawater transfer project are used once the planning, phased implementation of the principle.
Coal Chemical Engineering
This project utilizes 33.4 million tons/year of local self-produced fine washed lignite as raw material and produces 10 billion standard cubic meters/year of synthetic natural gas, of which the first phase of the construction scale is 5 billion standard cubic meters/year, with an investment of 11.52 billion yuan. This project is a mine-type coal gasification plant, which can gasify, convert and make high-quality synthetic natural gas from sub-quality lignite in situ, and meet the national natural gas quality standard GB 17820-1999, the first and second technical indicators.
In the process of coal natural gas production, the by-production of high-quality solid sulfur, 15% agricultural diluted ammonia, as well as part of the pure oxygen (O2), pure nitrogen (N2), pure argon (Ar) and pure CO2 and other gas products.
The lignite gasification process is from the coal washing plant of the fine washed coal crushed into coal dust, after 300 ℃ nitrogen heating, by the carbon dioxide gasifier conveyed to the gasifier for gasification, gasification of water gas through the conversion process to adjust the ratio of carbon monoxide and hydrogen into the low-temperature methanol scrubbing device, to remove sulfur, after purification sent to the methane synthesis device to synthesize artificial natural gas.
The project is recommended to adopt a number of world-leading technology and equipment:
Large-scale lignite dry pulverized coal oxy-fuel pressurized gasifier, radical cooling process, CO2 pressure airflow coal feeding technology. The technology to be used in the domestic self-development, supplemented by the introduction of new design combinations, single furnace daily input pulverized coal amount of dry coal 2000 tons, gasification pressure of 4.0 MPa.
Large-scale advanced and energy-saving air separation device, a single set of oxygen production capacity of 90,000 standard cubic meters per hour, while providing the plant with pure nitrogen, oxygen, argon, and instrumentation air and plant installation air. Large air compressor to be introduced into foreign equipment, cold box can be localized equipment or domestic and foreign manufacturers to cooperate in the design and manufacture.
Adopting large-scale localized catalysts and equipment for conversion and low-temperature methanol washing and purification process technology with completely independent intellectual property rights, advanced and reliable technology, and saving investment.
The large-scale gas methanation plant is designed to adopt five sets of parallel production lines, each with a production capacity of 1 billion standard cubic meters per year. Catalysts and reactors may be based on foreign patented commercial technologies or newly developed domestic technologies, to be determined through inspection and bidding when the project is implemented.
This project together with the need for 9.8 MPa, 540 ℃ superheated steam 1,342.3 tons per hour, from the park construction of the gangue power plant boiler to send the device with high-pressure steam as a driving force to drive the compressor and other equipment, the turbine back-pressure discharge of low-pressure steam (including coal gasification plant by-products of steam) of 4,920 tons per hour, the temperature of 120 ℃, the pressure of 0.08 MPa, to send the desalination plant as heat source. The heat supply is highly reliable and economically reasonable.
Sea water desalination and salt production project
Sea water contains more than 90 kinds of elements, and all the elements that exist in nature on the earth can find its trace in sea water. In the ocean, seawater accounts for 96.5% of the water and 3.5% of the solutes composed of various salts. China's offshore seawater solubility is lower than that of oceanic water, and the solubility of salt solutes is about 3%. There are many kinds of solutes in seawater, but the solubility varies greatly. Among them, sodium, magnesium, calcium, potassium, chlorine, sulfur, bromine and a few other elements constitute the salts accounted for 99.9% of all solutes in seawater.
Using appropriate technology, the above elements can be extracted as products by sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl2), magnesium sulfate (MgSO4), calcium sulfate (CaSO4), bromine (Br2) and other compounds.
According to the characteristics of this project and the comprehensive comparison of seawater desalination technology at home and abroad, we take "low-temperature multi-effect distillation, concentration and desalination + multi-effect evaporation and crystallization separation" program desalination of seawater, the workflow is:
Seawater is pre-treated and then enters into low-temperature multi-effect desalination device, which, after the process of multi-effect concentration and separation, is separated into After pre-treatment, the seawater enters the low-temperature multi-effect desalination device, and through the multi-effect concentration and separation process, it is separated into desalinated pure water and 10% concentrated seawater.
The concentrated seawater after desalination is concentrated by multi-effect evaporation and concentration process, thickening to a concentration of 22% and obtaining fresh water.
During the concentration process, calcium sulfate dihydrate precipitates and separates into gypsum products after purification, which are used for building materials or other purposes.
22% of the concentrated mother liquor and has been separated out of magnesium sulfate recovery of high and low temperature salt mixed, precipitated by multi-effect evaporation and crystallization of sodium chloride salt slurry by dehydration, drying that is the finished product refined salt. Salt mother liquor to comprehensive utilization of the production of salt chemical products.
First of all, the use of evaporation method to produce potassium chloride. That is, the bitter halogen and magnesium chloride containing mainly thick halogen mixed halogen. Mixed halogen evaporation to 128 ~ 130 ℃ between the precipitation of high-temperature salt, the main component of sodium chloride and magnesium sulfur monohydrate.
The high-temperature salt is separated in two steps to obtain sodium chloride and magnesium sulfate. Evaporation of mother liquor clarified clear liquid cooling to 30-35 ℃ carnallite crystals precipitated. Add water decomposition system to get crude potassium chloride, crude potassium chloride purification system to get refined potassium chloride.
The bromine content of the thick halogen is increased after the extraction of potassium chloride, mainly in the form of magnesium bromide and sodium bromide, and bromine is extracted by oxidation with chlorine gas and distillation with water vapor. The process of making bromine consists of preheating, oxidation, distillation, bromine gas condensation, bromine water separation and distillation.
The waste liquid of bromine production after extraction of bromine produces crystalline magnesium chloride through the processes of brine preheating, evaporation and concentration, heat preservation and sedimentation, and cooling and crystallization.
The magnesium mother liquor is recycled back into the process, or evaporation is used to produce halogen flakes.
The various magnesium compounds obtained in the process can be used as products or further that processed into high purity magnesium oxide and other magnesium fine chemicals.
The process route in the low-temperature multi-effect distillation device using Qinhuangdao Xinyuan Water Industry Co., Ltd. developed new low-temperature multi-effect seawater desalination device with independent intellectual property rights and won the national patent for invention, the device is characterized by: the use of drawer-type structure, manufacturing and assembly, maintenance and maintenance is convenient; the use of the Ou Guan plate evaporator, seawater can be realized high times the concentration, the concentration rate of 7 times; the use of plate evaporator, modularization; the use of the plate evaporator, modularization; the use of the plate evaporator, the concentration rate of 7 times. Plate evaporator, modular design, to facilitate large-scale mass production; device structure is simple, manufacturing process is good, the existing domestic means of manufacturing can be achieved; device supporting mechanical and electrical equipment all localization; tons of water device manufacturing cost than foreign companies to reduce 30 ~ 40%. The technology and equipment of the salt production system in the process route have been widely used at home and abroad. Has been put into production in Tianjin Changlu Hangu Salt Chemical Plant, the use of evaporation and crystallization separation device with an annual output of 150,000 tons of sea salt.
Sea water desalination and salt engineering heat source from the coal chemical engineering by-products of preheated steam, the two projects are long and adjacent to the arrangement, which is conducive to low-pressure steam delivery, reduce losses.
The total scale of this project will reach 310 million cubic meters of fresh water per year, and 11.2 million tons of salt chemical products, specifically 8 million tons of refined salt per year; 200,000 tons of potassium chloride per year; 500,000 tons of magnesium sulphate per year; 20,000 tons of bromine per year; and 2 million tons of magnesium chloride per year, and a certain amount of other seawater chemical resource products can be produced.
In order to match the waste heat steam of the coal chemical engineering, the construction scale of this project reaches 70% of the total scale, with an investment of 6.5 billion yuan.
The fresh water produced by this project is used locally for coal chemical industry, salt chemical industry and other industrial water, grassland ecology, agriculture and governance of desertification as well as water for people's living; refined salt is used for the downstream of the two alkali chemicals in the region, the Bohai Bay area and the Northeast China and North China two alkali chemical salt, etc.; potassium chloride, bromine is a salt chemical industry short-line products to alleviate the domestic market; magnesium sulfate, magnesium chloride salt chemical products can be sold directly to the domestic and foreign markets, or processed and produced. sold to domestic and foreign markets, or processed to produce potassium and magnesium fertilizer, magnesium hydroxide, magnesium oxide and magnesium metal and other downstream products.
Boji Xixi Seawater Transportation Project
Boji Xixi Seawater Transportation Project is the basic project of the circular economy industrial project of introducing seawater desalination in Xilingol League of Inner Mongolia Autonomous Region. Planning from Huludao City, Liaoning Province, Xingcheng East Taizili East Coast water, using a combination of pressurized buried pipe and pressureless tunnel water transmission, through Huludao City, Liaoning Province, Chaoyang City, Inner Mongolia Chifeng to Xilinhot City, the middle of the water is not divided. The total length of the line is 618.46㎞, the designed water transmission scale is 365 million m?/year, the designed flow rate is 12.8 m?/s, and the water transmission is uninterrupted throughout the year.
The project is built in one phase and completed with an investment of 15.9 billion yuan. A phase of the operating scale to reach 70% of the design scale, the second phase when the operating load of 100%.
The water transmission line across Liaoning, Inner Mongolia two provinces (autonomous regions). Passing through 8 times railroad, 29 times highway, 20 times river.
The project is mainly arranged with 9 pumping stations, 11 pressureless tunnels, 21 pressurized buried pipes and 57 crossings with railroads, highways, national highways, provincial highways and rivers. In order to improve the water supply guarantee rate of the project, there is an online water transfer and saving reservoir.
Nine pumping stations in four in Inner Mongolia, five in Liaoning Province. The total design head is 1170m, the total installed capacity is 280,800KW, the single head of each pumping station is 130m, the single pumping station is equipped with 6 sets of machines, including 2 sets of standby, the design flow rate of a single unit is 3.2 m?/s, the installed capacity of a single unit is 5,200KW, and the installed capacity of each pumping station is 31,200KW.
The 11 tunnels are all for unpressurized water conveyance, with the longitudinal slope of 1/5,000, and the total length of 304.73km, the length of which is 1.5000m, the total length of which is 1,500m, the total length of which is 1,000km. The total length of these tunnels is 304.73 kilometers, and there are 7 tunnels longer than 10 kilometers, of which 9# tunnels are 43.384 kilometers, and the longest one, 11# tunnels, is 142.4 kilometers.
The 1#～20# pressurized buried pipes are sand-laminated FRP pipes with a total length of 313.73km, an inner diameter of 3.2m, and a bearing pressure of 0.6-2.0 MPa. The 21# pressurized buried pipes are arranged between the regulating reservoir and the seawater desalination, which are also sand-laminated FRP pipes with double-pipe arrangement, and a double-pipe arrangement, with an inner diameter of 3.2m, and a bearing pressure of 0.6MPa or less.
The geographic location of the regulating reservoir is about 18km northwest of Xilinhot City, about 1.5km away from the receiving point, and according to the topographic conditions, it is arranged on the south bank of the Xilin River between the small basins surrounded by Tahaieyaki and hill Rolling Ledger. It has a total storage capacity of 17 million meters and a regulating capacity of 15 million meters, which can meet the water demand for 15 consecutive days in case of an accident at a pumping station or pipeline. Up to 35 days of non-consecutive accidental shutdowns can be met annually. The regulating reservoir is fed by the buried pipe on the east side, and the designed inlet flow is 12.8 m?/s, and the outlet flow between the two hills on the west side is 11.57 m?/s. The inlet and outlet of the regulating reservoir are controlled by gates.
There are 125 pools of water along the line, which are used to withdraw the water during maintenance, which can make the maintenance fast and convenient. After the maintenance is completed, the water in the retreated pool will be released back to the original pipeline or tunnel. The designed volume of water withdrawal is 7,473,700 m?
The water transmission line can be divided into four sections according to the region: Huludao municipal jurisdiction section, Chaoyang municipal jurisdiction section, Chifeng municipal jurisdiction section, Xilinhot municipal jurisdiction section.
Nine pumping station plant mainly consists of water intake system, main and auxiliary plant, control building, water discharge system, substation and its ancillary buildings.
The water intake system adopts one machine and one pipe to enter the flow, and supplies water to 6 pumps through the connecting pressure type front pool and the water intake branch pipe of 1.4m in diameter. The water discharge system adopts one machine and one pipe, and six 1.2m diameter water discharge branch pipes merge into the 3.2m diameter water discharge main pipe to supply water to the next pumping station.
11 pressureless water tunnels, of which 3 #, 9 #, 10 #, 11 # four long tunnels are mainly used in the construction of TBM tunnel boring machine, for the circular section, the inner diameter of 4.3 m. The other 7 tunnels are constructed by drilling and blasting method, for the city gate type of hole, the bottom clear width of 4.0 m, the clear height of 4.9 m.
TBM method is used in the construction of the long tunnels, and drilling and blasting compared to the method of TBM construction has a safe, fast (average) and efficient (average). Compared with the drilling and blasting method, TBM construction has the advantages of safety, speed (average daily footage of 20-40m), high quality and efficiency, low support costs, small amount of temporary construction works, etc., and at the same time, it can reduce the construction area, which is conducive to environmental protection.
The water pipeline mainly adopts the socket type fiber-winding sand sandwich FRP pipe, the design pressure of the pipe is 2.0 ~ 0.6MPa. The average depth of the top of the pipe is about 2m. The water pipeline crosses the river and the ditch (ditch), and the design of the water pipeline adopts the form of inverted siphon pipe. Inverted siphon pipe top covered from the bottom of the riverbed minimum thickness of 2.0m.
Pipeline crossing the river, first of all to build a barrage and open the diversion channel, dam embankment is completed, pumping out the middle of the two embankment cement, and then carry out silt cleanup, desilting the riverbed after the excavation of the riverbed with a good soil backfill, tamping, to reach the elevation of the base of the masonry, and finally complete the masonry work. For rivers that have dried up, you can use the excavation method of construction.
When the pipeline crosses the highway and railroad. In order to ensure smooth transportation, the construction of pipe jacking method. For the pipe jacking length and different underground quality, the corresponding pipe jacking process.
The bottom of the pipe is generally only sand foundation bedding, thickness 20cm. but for plane turning, steel pipe, crossing the poor geological conditions and across the river, ditch section of the pipeline, the proposed use of slurry masonry or concrete rigid seat cushion.
The sand sandwiched FRP pipe is 12m long per section and weighs about 10t. It is produced in the FRP pipe factory built for this project, transported to the working surface by 15t laden car, and lifted by 20t~30t car crane. The foundation and bedding layer should be compacted before the pipe installation, and the earth should be backfilled in layers after the pipe installation, with the maximum backfill thickness of each layer not exceeding 300mm, and compacted by light machinery.
Lignite Open Pit Coal Mine Project
The East No.1 Open Pit Coal Mine is located in the central part of Shengli Coal Field, adjacent to Xilin River in the west, with a surface area of 5.0-6.5km in east-west direction, 6.5-7.8km in north-south direction, and covering an area of 41.76km2. Geological resources of 3.16 billion tons are available in the mining area. According to the characteristics of the mine and the climate of the region, the main stripping mining process of the mine is a single bucket-self-shifting crusher-belt conveyor-semi-demand mining process.
The construction of the open-pit mine is based on the usage of the coal-chemical plant, and is planned once, built in phases, and developed on a rolling basis. According to the demand of coal used in the coal chemical plant, the first phase of the open-pit mine construction scale of 20 million tons/year, with an investment of 7.56 billion yuan; the second phase of the construction scale reaches 50 million tons/year.
Coal Preparation Plant
The washing process of the coal preparation plant adopts the internationally advanced lump coal heavy-medium chute sorting, end coal two products heavy-medium cyclone sorting, coarse coal slurry centrifuge dewatering, fine coal slurry screen sedimentation centrifuge + fast-opening plate and frame filter press combined dewatering process.
The whole plant process system is simple, flexible and highly reliable, which can realize all the end coal into the washing and part of the washing, and the system can be converted flexibly according to the requirements of the product coal. The system adopts the international advanced heavy media sorting process, with high sorting precision and real-time online adjustment and control of sorting specific gravity according to the ash content of fine coal. The thickener of coal slurry water system adopts one-use and one-standby, which ensures that all coal slurry water of the coal preparation plant is recycled within the plant, and the washing water reaches the closed-circuit cycle at the national level, and the coal slurry water is not discharged, so as to satisfy the environmental protection requirements of the coal preparation plant and the surrounding environment.
The raw coal through the coal selection process, selected lignite concentrate, gangue and coal, gangue and coal separation and dehydration for gangue power plant power generation, concentrate by special equipment to break the lignite water sub-bonds, can be carried out and lignite low-temperature dehydration. Dehydrated lignite coal concentrate has low ash melting point, retaining the original combustible volatility of lignite, which is the most excellent coal for gasification, and can be made into coal water slurry for Texaco gasifier gasification of raw material coal; it can also be made into lignite coal concentrate for high temperature pulverized coal furnace gasification of raw material coal; this process is used for large-scale lignite upgrading to reach the standard of commercial coal, which is suitable for long-distance transportation.
The scale of the first phase of this project is 25 million tons of raw lignite coal per year, with an investment of 1.48 billion yuan; after the completion of the second phase of the project, the total scale will reach 50 million tons of raw lignite coal per year.
Gangue Power Plant
Boiler selection of 670 tons / hour circulating fluidized bed boiler, steam pressure of 9.8MPa, temperature of 540 ℃, the fuel gangue and coal, steam generator set selection of condensing generator set, a single power generation of 300,000kw, steam condensate returned to the desalination of water through the mixed-bed desalination treatment and return to the boiler room for the boiler feed water. Gangue The total scale of 600,000kw, including a construction scale of 300,000kw, investment of 4.5 billion yuan.
The products and raw materials of the six projects of the Xilingol League Desalination Circular Economy Industrialization Project are interlinked to form a circular economy industry chain as follows:
First of all, 60,600 tons of lignite are mined from the lignite open-pit mine every day, which is sent to the coal processing plant. In the coal processing plant, 51,600 tons of fine washed lignite are selected daily and sent to the coal chemical plant as the raw material for lignite gas production. At the same time, the remaining 24,100 tons of washed medium coal and gangue are sent to the gangue power plant to generate electricity.
The Coal Chemical Plant produces: 13.7 million standard cubic meters of coal gas; 235 tons of agricultural ammonia; 139 tons of sulfur; and 6,800 tons of ash daily from the washed lignite. The waste heat steam generated in the production process of 111,400 tons is lost to the desalination salt plant, as the thermal power of desalination salt production.
The Bohai Sea through the "seawater transfer project" daily to the project park 700,000 cubic meters of seawater. This part of the seawater into the "desalination and salting plant", the use of "coal chemical plant" output of 111,400 tons of low-pressure steam, where the daily production of 10,900 tons of refined salt; 959 tons of calcium sulfate; 384 tons of potassium chloride; magnesium sulfate 959 tons; 54.8 tons of bromine; the project park. ; 54.8 tons of bromine; and 3,835 tons of magnesium chloride. At the same time, it produces 595,000 tons of desalinated water, except for 21,000 tons for its own use, 36,000 tons for "Coal Chemical Plant", 61,000 tons for "Gangue Power Plant", 01,000 tons for open-pit coal mine, and 0.7 million tons for coal washing plant. The remaining 469,000 tons of desalinated water was sold as commercial water.
In the gangue power plant, the use of coal and gangue can generate 7.2 million kilowatt-hours of electricity per day. This power is provided to "on, lignite mine" 770,000 kilowatt-hours; provided to "coal washing plant" 780,000 kilowatt-hours, provided to the "coal chemical plant" 2.36 million kilowatt-hours; provided to the The remaining 1.834 million kWh was supplied to the "coal washing plant" and the "coal chemical plant". The remaining 1,834,000 kWh of electricity is connected to the national grid for the "seawater transportation project". The above adopted daily production scale is the scale of the first phase of each project.
The coal chemical project and the seawater desalination and salt production project will produce a large amount of low-heat water, and the project proposes to build a water drying tower to consume this part of the heat, but the investment is large, the operating cost is high, and the energy is wasted, without getting the value of the effective conversion.
If the circular economy according to the design of the Ministry of Agriculture Planning and Design Institute design, we can consider these low-thermal water recycling, the use of its thermal energy to develop intensive agriculture and animal husbandry, such as the construction of greenhouse greenhouses to produce high-quality silage, to provide high-quality forage for the aquaculture industry; the construction of intensive large-scale sprinkler irrigation planting forage, 200,000 head of cattle; the construction of biogas power station, etc., but also the development of appropriate It can also develop corresponding slaughtering and leather processing industry. Through a series of multi-level recycling, the energy of these low-heat quality water will be fully utilized, improving the utilization rate of energy and resources. The development of intensive agriculture and animal husbandry can improve the use value of the local desertified land, increase the output of agricultural and animal husbandry products, and improve the living standard of the people.
Industrial park layout
The project site is located in the northern suburb of Xilinhot City, Hongyuan Industrial Park, the park east-west length of 5000m, north-south width of 4,000m, in Hongyuan Industrial Park, the planning and layout of seawater desalination and salt chemical engineering, coal chemical engineering, and the park's supporting engineering thermal station, gangue power plant, substation and public **** service facilities and living quarters. The terminal reservoir of the seawater transportation project is 1.5km to the south of the park. The coal used in the project is transported to the coal washing plant in the middle of the park and the coal mine by a belt after mining. After washing, the fine washed coal is transported to the coal chemical plant by a belt, and the middle coal and gangue are transported to the gangue power plant for power generation by a belt.
Hongyuan Industrial Park near the railroad and highway traffic in all directions, the traffic conditions are very convenient. At present, the set - through the railroad, tin - Sang railroad from the park through the vicinity of the Shengli coal field is about 5 kilometers away from the two railroads are very convenient, 207 State Road and 303 State Road through the city, south of Zhangjiakou, east of Keshketeng Banner. There are conditions for the transportation of large and oversized pieces of railroad and road transportation when the plant is built.
The total investment of the project is 70.66 billion yuan, of which 47.46 billion yuan is invested in the first phase and 23.2 billion yuan in the second phase. The static payback period including the construction period is 8.02 years before tax and 9.11 years after tax.
The Inner Mongolia Autonomous Region Xilingol League to attract seawater desalination recycling economy industry project, will create a new world for the Inner Mongolia region of the sustainable development of recycling economy, at the same time for the use of seawater to open up a whole new field, is a new breakthrough in the mode of the marine economy, is the sea and land integration of the development of the strategy of the specific practice. This project transfers a large amount of seawater from the Bohai Sea, which can make the sea flow and purify the Bohai Sea to a certain extent.
This project is equivalent to the salt production of 100,000 hectares of salt fields, which can replace a large number of salt fields along the coast and alleviate the land tension in economically developed coastal areas.
The proposal of the project has extremely far-reaching significance for Inner Mongolia, Xinjiang and even the whole western region, which is rich in coal resources and seriously lacks water