1. SHS technology
The technology by the Shanghai Haimao Engineering Company and the Shanghai Chemical Industry Research Institute for the development and design, has been implemented in Shandong Ruxi, Jiangsu Xinyi, Henan Yanshi, Shaanxi Chenggu and other places. The core of the process is: improve the η(CO2) of urea synthesis tower; fully tap the potential of the existing device; rational use of methyl ammonium generation heat and other three technologies. After the transformation, the main unit consumption of tons of urea is expected to be: 595kg of liquid ammonia, 760kg of CO2, l200kg of steam, and 130t of cooling water.
2. High-pressure circle urea optimization technology
This technology was developed, designed and implemented by China Wuhuan Chemical Engineering Company, the core of the technology is to increase the second urea synthesis tower in the high-pressure circle; the gas lifting tower and the high-pressure methyl ammonium condenser; the use of Cetonium ammonium generation heat. Methyl ammonium condenser; CO2 gas stripping technology. The technology is currently running on a pilot basis at Huixian Fertilizer Plant in Henan Province, but for various reasons it has not been started. After the implementation of this technology, it is expected that the unit consumption of tons of urea will be 585kg of liquid ammonia, 700kg of CO2, 1000kg of steam, and 100t of cooling water.
3. Energy-saving new process to increase production
This technology is jointly developed by the Chenhua Design Institute in Beijing and the Zoucheng Nitrogen Fertilizer Plant in Shandong, featuring the following characteristics: the use of two synthesis towers, the use of four-stage decomposition at different pressures, and the unique design of both the methylammonium condenser and the gas lifting tower. Lift tower are unique design, by-product 0.8MPa steam. The process of tons of urea unit consumption is: liquid ammonia 590kg, CO2 760kg, steam 900kg, cooling water 130t. As the process has just been implemented, it needs to be further improved and explore.
Domestic production of urea at present, the development of new technologies are:
1. Deep hydrolysis device
With the concern of the community on environmental issues, small urea plants on the depth of the hydrolysis issue has gradually been put on the agenda. At present, some domestic design units proposed the use of high-efficiency hydrolyser to transform the original desorption system, or a new device using optimized hydrolysis - desorption system, so that all the urea plant discharge water back to the production unit to do the process water or boiler supplementary water, to achieve zero emissions. The process uses 1.3 ~ 3.9MPa steam, the main equipment investment of 800,000 ~ 1 million yuan.
2. Pelletizing device
Generally through the following ways to solve the problem of urea particle size:
Select large particles pelletizing nozzle, so that 80% of the urea particles are larger than 2mm in diameter;
The use of fluidized bed cooling device to reduce the temperature of the bag, to solve the problem of easy to agglomerate after the overproduction of particles separated from dust;
The use of the Beijing DALICO company developed a double drum fluidized bed large particles of urea technology, urea particles diameter of up to 4 ~ 6mm, there are two domestic use of this technology;
The original granulation system does not move, the increase in the production of urea in the granulation of urea taken out before the use of urea melt to produce nitrogen-phosphorus-potassium composite fertilizers, at present, the Shanghai Research Institute of Chemical Technology is a small urea plant in the implementation of this technology.
Urea has a variety of production methods, but currently widely used at home and abroad is ammonia and carbon dioxide synthesis method. There is no difference in the synthesis method of ammonia, carbon dioxide production of most domestic use of natural gas and coal as raw materials. From the production process of urea, regardless of the purity of carbon dioxide affects the output rate of urea.
In order to test the different raw materials produced by the urea in the crop foliage spraying effect, this year, we purchased from the market to coal as raw material production of "Fengxi" brand urea and natural gas as raw material production of "Tianchi" brand urea, in mid-April to late-May, we purchased from the market to the "Tianchi" brand urea, in mid-April to late-May, we purchased from the market to the "Fengxi" brand urea and natural gas as raw material production. From mid-April to late May, foliar spraying tests with different concentrations of urea solution were conducted on wheat and apple trees. The test is located in Yuncheng City, Wang Fan Village, Wang Fan Township, *** set up 8 test points, including: wheat 4, apple 4. The spraying concentrations were 1.0%, 1.5% and 2.0%, respectively, and the spraying was carried out in the wheat pulling period and the apple fruiting period. Plant height, leaf color change and leaf burn rate of wheat and leaf color change and leaf burn rate of apple were investigated four times after spraying. The results of the survey were: in the foliar spraying of 1.0% urea solution, the two brands of urea on wheat plant height has little effect, wheat and apple leaves basically no burn phenomenon; in the foliar spraying of 1.5% and 2.0% urea solution, the average burn rate of wheat leaves in the water land was 13.5% and 28.3%, respectively, and the apple leaf burn rate in Pingchuan land was 7.7% and 27.0%, respectively, and the two brands of urea at the same spraying concentration on the leaf scorching. The two brands of urea at the same spraying concentration had no significant difference on leaf scorching. This explains two points: First, under the conditions of this test, wheat and apple trees suitable spraying urea concentration of 1.0%, two brands of urea in the same spraying concentration, the crop leaf scorching is basically the same; Second, it shows that the synthetic urea carbon dioxide production method is different, does not affect the quality of urea.
Production method of solid compound amino acid fertilizer
This technology relates to the production method of a solid compound amino acid fertilizer, which consists of soybean cake, rapeseed cake as raw material, crushed, sieved, hydrolyzed, stirred, adjusted pH, discharged, dried, crushed, sifted, granulated, packaged, etc., this technology is compared with the existing technology, it is simple to produce, less investment in equipment, the production cycle is short. High nutrient content of the product, the effect of yield increase is significant, in vegetables, fruit trees on the test than the application of equal amount of cake fertilizer yield increase of 6.1-14.1%, and can improve the ability of the soil to retain fertilizer supply and improve the quality of crop yield. No. 30503145
Production of urine-based compound fertilizer spray urine long-distance delivery method and system
The present technology discloses a production of urine-based compound fertilizer spray urine long-distance delivery method and system, such a system consists of urine insulation delivery pipeline system and urine concentration control system, urine concentration control system consists of an electric regulator valve, a flow sensor, a regulator, diluent injection pump, the urine heat preservation conveying piping system is a reverse jacket heat preservation structure, and the urine is conveyed at a concentration of 92%-99.7% and a temperature of 125° C. to 132° C. under the control of the urine heat preservation conveying piping system and the urine concentration control system. No. 30503146
Non-homogeneous urine-based compound fertilizer fluidized granulation process
This technology is a non-homogeneous urine-based compound fertilizer fluidized granulation process. The dissolved urea solution atomized in the granulator coats the granular crystal seeds in the fluidized bed layer for granulation to generate a granular compound fertilizer with phosphorus, potash, or other substances as the kernel and urea as the shell. The concentration of urea solution is ≥95%, and the concentration of total nutrients of compound fertilizer (N + P ↓ [2] O ↓ [5] + K ↓ [2] O) is 30-57%. The crystalline species is at least one of the phosphorus source or potassium source fertilizers. The urea solution is supplemented with trace elements or one or more of herbicides or water retention agents or pesticides. The fluidized bed may be a spraying one fluidized bed or a vibrating one fluidized bed. The process is short, the product quality is good and the production efficiency is high. No. 30503147
Powerful urea and its preparation method
The present technology relates to a kind of urea fertilizer. It is characterized by adding calcium cyanamide to ordinary urea. In the urea production process, the calcium cyanamide is added to concentrated urine or molten urea in a certain ratio, and the product is made after sufficiently uniform mixing. The strong urea of this technology has the advantages of long fertilizing period and high utilization rate of urea nitrogen fertilizing effect. In addition, the low cost of calcium cyanamide, so that the product is more widely promoted value. No. 30503148
A kind of Maifanshi coated urea and its preparation method
A kind of Maifanshi coated urea, which mainly consists of urea, Maifanshi, bone gum and starch, the advantage is to reduce the loss of urea through the Maifanshi coated after the loss of urea and volatilization, to play a slow-release, the release period is extended, reduce the nitrate, the environmental pollution to play a certain role in the application of the urea coated fertilizer Does not slate the land, the crops have a role in helping to grow, anti-inversion support, strong roots, and promote early maturity. No. 30503149
Improved polymer-sulfur-polymer coated fertilizer of American Inventor's Name
The present technology discloses a polymer-coated, followed by a sulfur layer, followed by a polymer layer coated fertilizer such as urea. The preferred polymer coating is formed by direct in situ **** polymerization reaction of the polymer composition on the fertilizer and sulfur coating. The compositions provide positive controlled release characteristics, are abrasion and impact resistant, and are more economical to produce than polymer coated fertilizers. No. 30503150
A method for preventing caking of urea
A method for preventing caking of urea, characterized in that formaldehyde is added to the urine solution before the urea is pelletized to allow sufficient reaction between the urea and the formaldehyde to generate a urea-formaldehyde solution (UFD solution) as a urea pelletizing additive for the production of pelletized urea products, the reaction residence time of the urea and formaldehyde is 1 to 10 The residence time of the reaction between urea and formaldehyde is 1 to 10 hours, the pH value of the urea-formaldehyde solution is controlled at 6 to 8, and the molar ratio of formaldehyde/urea is 4 to 6. The generated urea-formaldehyde solution does not need to go through the process of concentration or evaporation, and the pressure difference between the import and export of the molten urea pump will be utilized to add the generated urea-formaldehyde solution directly into the inlet of the pump as a pelletizing additive for urea. No. 30503151
Adjustable and efficient organic and inorganic compound fertilizer
A kind of adjustable and efficient organic and inorganic compound fertilizer and preparation process. The raw material composition of the adjustable and efficient organic and inorganic compound fertilizer has the advantages of improving the soil and increasing the utilization rate of chemical fertilizer. Compared with general fertilizers, its nitrogen utilization rate can be increased by 8-15 percentage points, phosphorus utilization rate can be increased by 5-10 percentage points, and potassium utilization rate can be increased by 3-5 percentage points. Make urea and other nitrogen release gently, prolong the fertilizer period, increase the effectiveness of fertilizer, the compound fertilizer is easily soluble in water, can be applied with the irrigation water flushing method, but also can be done as a base fertilizer once applied to achieve free of fertilizer, easy to use. No. 30503152
A kind of urea acid crystalline state fertilizer and its preparation method
The present technology relates to agricultural urea acid crystalline state fertilizer and its preparation method. The X-diffraction pattern of its crystalline powder, sulfuric acid solution and malic acid are mixed and stirred homogeneously and then heated to 70-100°C, and then cooled to the crystalline state. This product has the advantages of good fertilizer efficiency and low dosage, and can improve the physicochemical and biological properties of the soil, and is especially suitable for application in tobacco fields. No. 30503153
Prevention of dieback and quick-acting nutrient supplement for rice plants of Japanese technology
Provided is a method of preventing dieback or quick-acting nutrient supplement for rice plants such as lawn grass and a method of using the preparation, wherein the preparation is a non-chemical fertilizer, and has no effect on the environment and on humans and animals. This blight prevention or quick-acting nutritional supplement is characterized by containing one active ingredient proline or two active ingredients proline and inosine. No. 30503154
A multifunctional nitrogen fertilizer long-lasting agent
The present technology relates to additives, specifically a multifunctional nitrogen fertilizer long-lasting agent. It is prepared by mechanical mixing, and is mixed with nitrogen fertilizer or added to compound fertilizer for use. It is multi-functional with good inhibition effect, low cost, easy to promote and can clean the soil, prevent the growth of pests and weeds. No. 30503155
Particulate material cooling device
The utility model discloses a particulate material cooling device, which includes a shell, a feed port and a discharge port, characterized in that: there is a dispersal cone below the inside of the feed port, and there are holes in the cone with a spiral distribution, and there is a flow control mechanism consisting of a plurality of flat tubes at the bottom of the cooling device, and there is a regulating mechanism consisting of a plurality of shaped The bottom of the cooling device is provided with a flow control mechanism consisting of a plurality of flat tubes, and above it is provided with a regulating fence consisting of a plurality of shaped groove plates, and the cold air is sucked out from the side below the flat tubes of the cooling device through the holes on the flat tubes and groove plates into the material layer on top of the regulating fence by the extraction fan. This device is especially suitable for cooling urea pellets with small footprint, low energy consumption and small crushing rate. No. 30503156
Production of urine-based compound fertilizer spray urine long-distance conveying pipeline device
The utility model discloses a production of urine-based compound fertilizer spray urine long-distance conveying pipeline device, such a device consists of a urine insulation conveying pipeline and urine concentration control device, urine concentration control device consists of an electric regulating valve, flow sensors, regulators, diluent injection pump, the electric regulating valve and the flow sensor are installed in series before and after the first section of the urine heat preservation conveying pipeline, and the injection port of the diluent injection pump is connected to the urine pipeline of the urine heat preservation conveying pipeline after the flow sensor, and the regulator controls the switching degree of the electric regulating valve and the motor rotation speed of the diluent injection pump by accessing the output signal of the flow sensor. No. 30503157
Controlled-release urea-based products invented in California
Controlled-release urea-based feed additives and controlled-release urea-based phytonutrients for ruminants comprising particles composed wholly or predominantly in part of urea or having urea on the outer surface thereof, and an interpenetrating polymer network coating on the particles that resists wetting, the coating comprising: a reaction product of urea and a polyisocyanate, a reaction product of the polyisocyanate, an alkyd resin having at least one double bond in each of the repeating units, and an oil having at least one double bond. The coated phytonutrient has a substantially linear release rate from the soil over a controlled period of time such as 30-120 days. The coated ruminant feed additive has a substantially linear NPN release rate from the rumen over a controlled period of time such as 12-24 hours. No. 30503144
Fertilizer granulation rotary nozzle
Fertilizer granulation rotary nozzle, there is a nozzle body, the nozzle body wall made of spray holes, the nozzle body has a base plate and the upper cover, there is a feed port on the nozzle, the nozzle body is installed in the liquid distributor body, the distributor body is installed in the upper part of the inducer disk, the distributor body is fixed by the connecting plate and the upper cover, and the inducer disk is located in the feed port below. This utility model is mainly used for urea, ammonium nitrate and other fertilizer production of granulation equipment components, liquid material in the nozzle body flow in an orderly manner, the pressure head of each nozzle hole is stable, the spray out of the granulation journey, time is short, reduce the generation of diureas, and can avoid the cooling air to go short-circuit, improve the efficiency of heat exchange. No. 30503158
Novel preparation for use as a nitrification and urease inhibitor and method of preparation thereof invented in New Delhi, India
The present technology relates to a novel preparation for use as a nitrification and urease inhibitor, said preparation comprising an effective amount of nitrogenous fertilizer, castor oil, and Artemisia annua oil, the latter being sufficiently abundant to cause an increase in the nitrification inhibitory activity of the preparation, and relates to a method of producing the preparation and a method of applying the preparation to soil. No. 30503159
Process for the preparation of granular compound fertilizer compositions and products thereof invented in Delaware, U.S.A.
The present technology relates to the preparation of a granular compound fertilizer composition by applying a liquid mixture of urea and formaldehyde to a dry substrate, such as a source of phosphorus, potassium, an ancillary nutrient, a micronutrient source, or mixtures thereof, such that the liquid mixture is reacted in situ methyleneurea reaction product formed, thereby facilitating adhesion of the substrate to the particulate complex, and the substrate is pelletized while the liquid mixture is reacting to form a particulate compound fertilizer composition. No. 30503160
Minnesota-invented regulated fertilizers comprising lactic acid derivatives and methods of manufacture and use thereof
The present technology provides a regulated fertilizer product. The regulated fertilizer product comprises a urea-containing fertilizer and a lactic acid-derived regulator. The regulator is preferably at a concentration of about 0.1-5% by weight. The regulator is preferably lactic acid, propionate and/or polypropionate. The present technology provides a method for regulating a fertilizer comprising mixing a urea-containing fertilizer and a regulator at a temperature of about 135-145°C. The present technology provides a method for using a regulated fertilizer. No. 30503161
Method of treating fertilizer process solutions of the Finnish Helsinki invention
A method of preparing a solid product containing nitrogen and phosphorus, preferably a solid ammonium phosphate and/or a urea-ammonium phosphate product, in which a solution containing urea and phosphoric acid is heated. Water is then evaporated from the solution and the urea in the solution is decomposed into ammonia and carbon dioxide. The carbon dioxide is discharged from the reactor together with water vapor; the ammonia produced neutralizes the phosphoric acid. A suspension containing ammonium phosphate and/or urea-ammonium phosphate is obtained, which is solidified, dried, crushed, ground and/or granulated. The final product may itself be used as a fertilizer or may be used as part of a fertilizer mixture. No. 30503162
Fertilizer containing ammonium thiosulfate invented in Tokyo, Japan
The purpose of the present technology is to provide environmentally friendly fertilizers containing ATS. That is, an aqueous solution of ammonium thiosulfate (hereinafter referred to as ATS) is added to a material with a high alkali exchange quantity and/or a porous material (hereinafter referred to as an ATS-retaining material) by mixing 1 to 50%, an acid or an acidic material is added to the mixture, and the pH is adjusted to be 5.5-7.6, and in the powdered ammonium thiosulfate-containing fertilizer and a fertilizer powder containing more than one of a nitrogen, phosphorus, and potassium ingredient obtained in this way, or that ATS retention material is added to the mixture obtained by adding ATS retention material to the fertilizer powder to form a powdered or granular ammonium thiosulfate-containing fertilizer by adding and mixing 1 to 15 w% ATS aqueous solution. No. 30503163
Stable synergistic slow-release calcium cyanamide compositions invented in Oregon, U.S.A.
The present technology discloses calcium cyanamide compositions and methods of application thereof. These compositions and methods stabilize compositions comprising calcium cyanamide reactive ions and increase the potency of calcium cyanamide alone or synergistically in combination with nitrogen-containing materials, such as urea, and organics, such as stable manure. These compositions and methods also facilitate direct delivery of the contents of the stabilized composition to a controlled site. The compositions and methods are effective for performing fertilization, soil amendment, metal stabilization, and odor and biological suppression. The compositions are stable, easily calibrated, and do not clog when sprayed for delivery to a target site. No. 30503164
Method for producing nitrogen-containing potash fertilizers invented in The Hague, The Netherlands
The present technology relates to a method for producing nitrogen-containing potash fertilizers based on urea and potassium chloride. The method consists of mixing potassium chloride with urea in a blender, heating the mixture and granulating it. Potassium chloride in the range of 1.66-9.9% by mass is selected for mixing and urea is fed into the blender in the form of a melt. Granulation was carried out by pelletizing in a gas stream in a granulation tower. The nitrogenous potash fertilizer produced in this way contains ........ (mass). No. 30503165
Manufacture and use of a leafy vegetable controlled-release fertilizer
This technology is a leafy vegetable controlled-release fertilizer manufacture and use of the method, according to the formula than the weighing of the weight of the measurement of the good mixing and blending, and then packaged that is the cost of the product; the use of the method of use is all as a basal fertilizer, and then in the sowing or transplanting before 1 ~ 2 days of the whole layer of the sprinkle, and then the bed leveling; the dosage of 40 ~ 50 kg / acre. 50kg/mu. The preparation process of this technology is simple, low cost, low price, product nutrient release rate in line with the leafy vegetables on the nutrient absorption needs of the law, long-lasting fertilizer, fertilizer nutrient utilization rate is high, easy to use and labor-saving. No. 30503166
Potassium nitrate compound fertilizer
This technology belongs to the field of fertilizers, involving a new type of nitrogen-phosphorus-potassium compound fertilizer and the production of the compound fertilizer method. Using potassium nitrate, ammonium bicarbonate, urea and ammonium phosphate as raw materials, the potassium nitrate compound fertilizer manufactured by granulation, drying and sieving is a new type of fertilizer due to the presence of nitro nitrogen fertilizer. It is widely used in different regions, different seasons and different crops, and has the characteristics of increasing crop yield and improving soil structure. No. 30503167
Wrapped humic acid urea and its preparation method
A wrapped humic acid urea and its preparation method, using coal humic acid by activation and urea particles reactive cross-wrapping and coating method, whose humic acid urea weight percentage composition is: moisture 3-5%, ash 2- 12%, humic acid content, 3-18%, urea content 70-95%. This method is simple, mild production conditions and low cost, the reaction formed by the parcel layer effectively inhibit the decomposition rate of urea in the soil and the generation of nitrite, so that the average crop yield increase of more than 10%, the nitrogen utilization rate increased by 5-10 percentage points, than the cost of urea to reduce the cost of 5%, and slowed down the application of urea caused by environmental pollution. No. 30503168
Selenium-enriched amino acid and its production method
This technology belongs to a kind of substance and its production method for increasing the selenium content of agricultural products, promoting the growth of crops, and improving the yield of crops. The selenium-enriched amino acid is made from plant cake meal or other substances rich in plant proteins, which are hydrolyzed under high temperature and acidic conditions, and selenide and trace elements are added. Used in grain, fruits, vegetables, melons, tea and cash crops, it can play a role in promoting crop growth, enhancing crop resistance and improving product quality. Make the selenium content of agricultural products significantly increased, crop yield increased by 5% to 30%. No. 30503169
A high liquid level alarm method
The present technology relates to a high liquid level alarm method, and in particular relates to a high liquid level alarm method for rotary granulation nozzle granulation in a urea device. It is characterized in that a thermocouple is installed in the upper part of the rotary granulation nozzle of the urea device. This technology solves the problem of urine crystallization blockage due to the use of thermocouple temperature measurement and alarm, so it is characterized by high reliability and good accuracy, and it can reduce the loss of 50,000 yuan per year. No. 30503170
A method of improving the strength of urea particles
This technology relates to a method of improving the strength of urea particles. The present technology is characterized as follows: the formaldehyde solution is sent from a storage tank, by a pump, to the second evaporator of the urea evaporation process, where the water is evaporated away, and the formaldehyde reacts with the urine in the second evaporator and its succeeding process to produce methylene diurea and its condensate. With this technology, the urea particle size is more uniform, the dust is very little, the particles are dry, smooth, non-sticky, and the color is not changed. No. 30503171
Amino acid bio-fertilizer and its preparation method
An amino acid bio-fertilizer comprising 5-15wt% of a potassium-containing amino acid solution, 40-60wt% of an amino acid fertilizer made from animal manure, brewer's dregs, and plant seed meal such as canola meal, tungseed meal, cottonseed meal, castor meal, Soybean meal and other raw materials made of animal manure fermentation material, 35-45wt% of inorganic fertilizer containing trace elements. Amino acid bio-fertilizer has the advantages of high fertilizer utilization, quick and slow fertilizer effect, improving and maturing the soil, and improving the quality of crops. No. 30503172
Method of pelletizing urea invented by Lugano Bisso of Switzerland
Method of pelletizing urea in a pelletizing tower [1] comprising the steps of causing a large number of droplets of molten urea to fall from the urea melt distributing device [4] into the urea pellet collecting bottom [6] of the pelletizing tower, and further comprising the step of cooling the collecting bottom [6]. No. 30503173
Compound long-lasting urea production process and special equipment
The present technology relates to the industrial production of urea, specifically a compound long-lasting urea production process and special equipment. The production process adopts a full cycle, in the urea granulation process before adding composite inhibitors to water, urine or molten urea, composite inhibitors added to the amount of granulation tower process after the weight of urea 0.5 ~ 5%, which will be mixed and made into a compound long-lasting urea; in the production of urea on the basis of the production process, in the flash tank process, into the liquid storage tank before the increase in the addition of water or urine as a solvent to the liquid Compound inhibitor solution process, or in the second stage of evaporation and separation, into the granulation tower before the molten urea as a solvent to add molten urea - compound inhibitor solution process, made of compound long-lasting urea. It can further extend the fertilizer effect and improve the nitrogen utilization rate.
Answer: wwwhahaxiaozi - Beginner Level II 1-31 19:42
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Other Answers*** 2 articles
Urea has a variety of production methods, but currently widely used at home and abroad is ammonia and carbon dioxide synthesis. There is no difference in the synthesis method of ammonia, carbon dioxide production domestic mostly used to natural gas and coal as raw materials. From the production process of urea, regardless of the purity of carbon dioxide affects the output rate of urea.
In order to test the different raw materials produced by the urea in the crop foliage spraying effect, this year, we purchased from the market to coal as raw material production of "Fengxi" brand urea and natural gas as raw material production of "Tianchi" brand urea, in mid-April to late-May, we purchased from the market to the "Tianchi" brand urea, in mid-April to late-May, we purchased from the market to the "Fengxi" brand urea and natural gas as raw material production. From mid-April to late May, foliar spraying tests with different concentrations of urea solution were conducted on wheat and apple trees. The test is located in Yuncheng City, Wang Fan Village, Wang Fan Township, *** set up eight test points, including: wheat 4, apple 4. The spraying concentrations were 1.0%, 1.5% and 2.0%, respectively, and the spraying was carried out in the wheat pulling period and the apple fruiting period. Plant height, leaf color change and leaf burn rate of wheat and leaf color change and leaf burn rate of apple were investigated four times after spraying. The results of the survey were: in the foliar spraying of 1.0% urea solution, the two brands of urea on wheat plant height has little effect, wheat and apple leaves basically no burn phenomenon; in the foliar spraying of 1.5% and 2.0% urea solution, the average burn rate of wheat leaves in the water land was 13.5% and 28.3%, respectively, and the apple leaf burn rate in Pingchuan land was 7.7% and 27.0%, respectively, and the two brands of urea at the same spraying concentration on the leaf scorching. The two brands of urea at the same spraying concentration had no significant difference on leaf scorching. This explains two points: First, under the conditions of this test, wheat and apple trees suitable spray urea concentration of 1.0%, two brands of urea in the same spray concentration, the crop leaf scorching is basically the same; Second, it shows that the carbon dioxide production method of synthetic urea is different, does not affect the quality of urea.