The following for you to share the Shenhua Baotou coal olefin, Shenhua Ordos Coal Direct Liquefaction, Shaanxi Coal Chemical Group, Pucheng
Project Name: Yuntianhua Group Hulunbeier Jinsin Chemical Co. Ltd. coal chemical water system overall solution
Keywords: coal chemical field water system overall solution model
Project Introduction
Hulunbeier Jinxin Chemical Co. The project is located deep in the Hulunbeier prairie, and the local government requires that the environmental protection facilities of this kind of chemical project should reach the level of "zero discharge". At the same time, this project is the first one in Asia to use BGL furnace (BritishGas-Lurgi) to produce ammonia and urea from coal gas, and the wastewater generated in the production process is complicated, highly polluted and difficult to treat. This project has also become a model for the overall solution of water system in the field of coal chemical industry in China.
Project scale
Gas water: 80m3/h Sewage: 100m3/h
Recycled water: 500m3/h Demineralized water: 540m3/h
Condensate: 100m3/h
Main process
Gas water: oil removing + hydrolysis and acidification + SBR + coagulation and precipitation + BAF + mechanical Stirring clarifier + sand filtration
Wastewater: air flotation + A/O
Desalinated water: raw water heat exchange + UF + RO + mixed bed
Condensate water: heat exchange + iron removal filter + mixed bed
Return water: clarifier + multi-media filtration + ultrafiltration + first-stage reverse osmosis + reverse osmosis for concentrated water
Beautiful Sky Environmental Group
Technical highlights
Main processes /p>
1, coal gasification wastewater contains a large amount of oil, the content of up to 500mg / L, in the form of heavy oil, light oil, emulsified oil, etc., the project set up oil separation and air flotation unit to remove oil, of which the air flotation using nano-bubble technology, nano-sized micro-bubbles with a diameter of 30-500nm, compared with the traditional dissolved air flotation, the number of bubbles is more, the retention time is longer, and the utilization of the bubbles is significantly improved, thus greatly improving the effectiveness of the removal of oil and the utilization rate of the bubbles. Therefore, it greatly improves the oil removal effect and treatment efficiency.
2, coal gasification wastewater characteristics of high COD, high phenol, high salts, low B / C ratio, containing a large number of difficult to degrade substances, the use of hydrolysis acidification process, not methane, the use of hydrolysis in the hydrolysis acidification tank and acid-producing micro-organisms, will be the sewage in the subsequent biochemical treatment unit less energy consumption, in a shorter retention time to be treated.
3, gas wastewater high ammonia nitrogen, set SBR can be realized at the same time the purpose of nitrogen and carbon removal.
4, the mature application of dual-membrane method in the treatment process of demineralized water and water reuse can effectively reduce the consumption of acid and alkali per ton of water, and easy to operate. After three years of operation, the current system desalination rate can still reach 98%.
Project name: EPC project of water treatment plant of Pucheng Clean Energy Chemical Co., Ltd, Shaanxi Coal Chemical Group
Keywords: the largest EPC project of water treatment in the field of new coal chemical industry in terms of contract value
Project introduction
The project is located in Pucheng County, Weinan City, Shaanxi Province, and adopts Texaco gasifier and DMTO second-generation olefins of Dalian Research Institute of Chemistry. The project is located in Pucheng County, Weinan City, Shaanxi Province. Therefore, the wastewater mainly consists of gasification wastewater and DMTO plant drainage, which is characterized by high ammonia nitrogen and high hardness. Botej Environment undertook the wastewater plant, water reuse plant and desalination plant of the company's 1.8 million tons of methanol and 700,000 tons of olefin per year project, and the total amount of the EPC contract for water treatment reached 500,000,000 Yuan.
Project Scale
Wastewater: 1,300m3/h Water reuse: 2,400m3/h
Strength water treatment system: 600m3/h
Demineralized water: primary desalination water 1,600m3/h
Process coagulation: 600m3/h Turbine coagulation: 1,200m3/h
Main Processes
Main Processes
Water treatment: 1,000,000 tons of methanol, 700,000 tons of olefins and 1,000,000 tons of olefins. /p>
Wastewater: Conditioning + Coagulation + Sedimentation + SBR
Rewater: BAF + Clarification + Activated Sand Filtration + Dual Membrane System + Concentrated RO
Demineralized Water: UF + Two-stage RO + Mixed Bed
Concentrated Water Treatment System: Heterogeneous Catalytic Oxidation
Process Coagulant: Filtering + Yang Bed + Mixed Bed
Turbulent Coagulant: Filtration + Mixed Bed
Turbulent Coagulant: Filtering + Mixed Bed
Turbulent Coagulant: 600m3/h Mixed bed
Technical highlights
1, the sewage system will be multi-stage tandem technology combined with the SBR process, the SBR reaction process with the time to time segregation for many times alternating between anoxic and aerobic conversion stage, the environment of filamentous bacteria caused by the expansion of the sludge will be limited, the sludge settlement rate will be increased; at the same time, separated from the length of the individual reaction section and microbial activity to match, make full use of the rapid denitrification stage, create a rapid denitrification stage. Make full use of the rapid denitrification stage, create a good biological environment, promote nitrification and denitrification reaction thoroughly, improve the efficiency of organic matter removal, to achieve high ammonia and nitrogen sewage pollutants standard treatment.
2, concentrated water using heterogeneous catalytic oxidation treatment technology, the use of high-activity heterogeneous catalytic filler and the reaction of Fe3 + FeOOH heterogeneous crystals, catalytic generation of more hydroxyl radicals, with strong oxidation capacity, reduce the amount of pharmaceutical inputs and sludge generation.