Production device of green urea peroxide
By using clean energy such as water and air to produce oxygen, nitrogen and hydrogen, combined with urea and hydrogen peroxide, the production of green peroxide has been achieved, the problems of fossil energy dependence and environmental pollution have been solved, and the production efficiency and profitability have been improved.
Patent Information
- Application Number
- CN202323321379.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-06
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-06
AI Technical Summary
The existing peroxide production process relies on petrochemical resources, resulting in waste of fossil energy and environmental pollution, and the inability to effectively utilize clean energy.
Using low-temperature methanol washing device, air separation device and electrolytic hydrogen production device, use clean energy such as water and air to produce oxygen, nitrogen and hydrogen gas, combine urea and hydrogen peroxide as raw materials, and produce peroxide through urea reaction production device to avoid gasification Slag, acid gas and wastewater pollution.
The green production of peroxide urea has been achieved, and the dependence on fossil raw materials has been eliminated, environmental pollution has been reduced, and production efficiency and corporate profitability have been improved.
Smart Images
Figure CN222111766U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of urea peroxide production, in particular to a green urea peroxide production device. Background Art
[0002] Urea peroxide is easily soluble in water. When it comes into contact with water, it releases O2, which has the functions of bleaching, sterilization and disinfection. It can be prepared into H2O2 solutions of different concentrations according to the requirements of sterilization and disinfection, which is easy to use. It has been widely used in many fields such as agriculture, medicine, textiles, daily chemicals, food, breeding, feed, printing and dyeing, metallurgy, and construction. Agricultural field: Urea peroxide is an excellent soil conditioner in agriculture. As long as a small amount of urea peroxide is added to the lower layer of the soil, it will increase the permeability of the soil, reduce the cohesive force of the soil, and reduce the flow of yellow sand. At present, the production of urea peroxide in China mainly uses petrochemical resources as raw materials. Specifically, the synthesis of urea mainly uses natural gas, coal, etc. as raw materials. The main raw materials for the production process of synthetic ammonia and hydrogen peroxide include coal, natural gas, petroleum, etc. Based on this, a large amount of non-renewable resources are needed in the production of urea peroxide, among which a large amount of gasification slag, H2S, CO2, wastewater and other wastes are also produced, which not only wastes fossil energy, but also causes environmental pollution. Utility Model Content
[0003] The purpose of the utility model is to provide a green urea peroxide production device to solve the problems raised in the above background technology.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A green urea peroxide production device comprises a CO2 tail gas pipeline of a low-temperature methanol washing device, an air separation device and a water electrolysis hydrogen production device, wherein oxygen outlets of the air separation device and the water electrolysis hydrogen production device are respectively connected to oxygen storage tanks, a nitrogen outlet of the air separation device is connected to a nitrogen storage tank, and a hydrogen outlet of the water electrolysis hydrogen production device is connected to a hydrogen storage tank; the nitrogen storage tank and the hydrogen storage tank are connected to an ammonia synthesis unit, the CO2 tail gas pipeline of the low-temperature methanol washing device and the ammonia synthesis unit are connected to a urea reaction production device; the hydrogen storage tank and the oxygen storage tank are connected to a hydrogen peroxide production unit; and the outlet of the urea reaction production device and the hydrogen peroxide production unit are connected to the urea peroxide production device.
[0006] The beneficial effects of the utility model are as follows: the utility model is used to produce urea peroxide. Through analysis and research, it can be known that the intermediate raw materials mainly contain oxygen, carbon dioxide and hydrogen. Based on this, carbon dioxide is provided by the tail gas in the low-temperature methanol washing device, hydrogen and oxygen are provided by the electrolytic water hydrogen production device, and the remaining oxygen is provided by the air separation device, so that the production of urea peroxide is freed from the dependence on fossil raw materials, which not only effectively protects non-renewable fossil raw materials, but also avoids the defects of gasification slag, acid gas and wastewater polluting the environment in the intermediate production process.
[0007] Preferably, the oxygen outlet of the air separation device is connected to the oxygen storage tank via a first pressure reducing valve.
[0008] Preferably, the outlet of the nitrogen storage tank is connected to the gas mixer inlet in the ammonia synthesis unit through a nitrogen compressor and a first valve; the outlet of the hydrogen storage tank is connected to the gas mixing inlet in the ammonia synthesis unit through a hydrogen compressor and a second valve.
[0009] Preferably, the ammonia synthesis unit comprises a gas mixer, the outlet of the gas mixer is connected to the ammonia synthesis reaction device, and the synthetic ammonia outlet of the ammonia synthesis reaction device is connected to the ammonia storage tank.
[0010] Preferably, the CO2 tail gas pipeline of the low-temperature methanol washing device is connected to the inlet of the urea reaction production device through a CO2 compressor, and the outlet of the ammonia storage tank is connected to the inlet of the urea reaction production device.
[0011] Preferably, a tee is provided between the outlet of the hydrogen storage tank and the hydrogen compressor, and the third end of the tee is connected to the inlet of the hydrogen peroxide production device in the hydrogen peroxide production unit through a second pressure reducing valve; the oxygen storage tank is connected to the inlet of the hydrogen peroxide production device in the hydrogen peroxide production unit through a third pressure reducing valve.
[0012] Preferably, the hydrogen peroxide production unit comprises a hydrogen peroxide production device, and an outlet of the hydrogen peroxide production device is connected to a hydrogen peroxide storage tank.
[0013] Preferably, the outlet of the hydrogen peroxide storage tank is connected to the urea peroxide production device through a fourth valve.
[0014] Preferably, the outlet of the urea reaction production device is connected to the urea peroxide production device through a third valve; and the outlet of the urea peroxide production device is connected to the urea peroxide packaging system.
[0015] A green urea peroxide production device made according to the above scheme uses clean energy such as water and air as main raw materials, and is used to produce urea peroxide in combination with carbon dioxide produced in a low-temperature methanol washing device. Specifically, nitrogen is separated from the air and hydrogen produced by a water electrolysis hydrogen production device is used as raw materials for synthesizing ammonia, and the tail gas from the synthetic ammonia and low-temperature methanol washing device is used as raw materials for producing urea; at the same time, oxygen separated from the air and hydrogen and oxygen produced by a water electrolysis hydrogen production device are used as raw materials for producing hydrogen peroxide; finally, urea peroxide is produced through hydrogen peroxide and urea; in the above process, the generation of gasified slag, acidic gas and wastewater to pollute the environment can be avoided, and water and air are used to replace traditional non-renewable fossil energy. The entire process is reasonably designed, tightly coupled, short in process and high in product added value. The low cost of raw materials can improve the profitability of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] In the figure: 1. air separation device; 2. water electrolysis hydrogen production device; 3. oxygen storage tank; 4. nitrogen storage tank; 5. nitrogen compressor; 6. hydrogen storage tank; 7. hydrogen compressor; 8. gas mixer; 9. ammonia synthesis reaction device; 10. ammonia storage tank; 11. hydrogen peroxide production device; 12. hydrogen peroxide storage tank; 13. CO2 tail gas pipeline of low-temperature methanol washing device; 14. CO2 compressor; 15. urea reaction production device; 16. urea peroxide production device; 17. urea peroxide packaging system; 18. first valve; 19. second valve; 20. third valve; 21. first pressure reducing valve; 22. second pressure reducing valve; 23. third pressure reducing valve; 24. fourth valve. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0019] Reference Figure 1As shown, a green urea peroxide production device comprises a CO2 tail gas pipeline 13 of a low-temperature methanol washing device, an air separation device 1 and a water electrolysis hydrogen production device 2, wherein the oxygen outlets of the air separation device 1 and the water electrolysis hydrogen production device 2 are respectively connected to the oxygen storage tank 3, the nitrogen outlet of the air separation device 1 is connected to the nitrogen storage tank 4, and the hydrogen outlet of the water electrolysis hydrogen production device 2 is connected to the hydrogen storage tank 6; the nitrogen storage tank 4 and the hydrogen storage tank 6 are connected to the ammonia synthesis unit, the CO2 tail gas pipeline 13 of the low-temperature methanol washing device and the ammonia synthesis unit are connected to the urea reaction production device 15; the hydrogen storage tank 5 and the oxygen storage tank 3 are connected to the hydrogen peroxide production unit; the outlet of the urea reaction production device 15 and the hydrogen peroxide production unit are connected to the urea peroxide production device 16. The utility model abandons the traditional technology of using traditional fossil energy as raw material to produce urea peroxide, and adopts clean energy such as water and air as the main raw materials, and uses the carbon dioxide produced in the low-temperature methanol washing device to produce urea peroxide; taking the production of urea and hydrogen peroxide as important nodes, the oxygen produced in the air separation device 1 is supplemented to the oxygen produced by the electrolytic water hydrogen production device 2 to prepare hydrogen peroxide; the hydrogen produced by the electrolytic water hydrogen production device 2 can not only be used as a raw material for preparing hydrogen peroxide, but also as a raw material for preparing liquid ammonia. Through the above coupling, the purpose of preparing urea and hydrogen peroxide can be met. The utility model uses urea and hydrogen peroxide as raw materials for producing urea peroxide. The process does not produce gasified slag, acidic gas and wastewater to pollute the environment, and can save traditional non-renewable fossil energy. The air separation device 1 described in the utility model includes an air compressor, a steam turbine, a liquid expander, etc., which are prior art and therefore will not be repeated; the water electrolysis hydrogen production device 2 includes an electrolytic cell, a hydrogen (oxygen) separator, a water tank alkali tank, etc., which are prior art and therefore will not be repeated.
[0020] Furthermore, the oxygen outlet of the air separation device 1 is connected to the oxygen storage tank 3 via the first pressure reducing valve 21. The first pressure reducing valve 21 can reduce the pressure of the oxygen produced in the air separation device 1 so that the pressure of the oxygen entering the oxygen storage tank 3 is consistent with the pressure produced in the water electrolysis hydrogen production device 2.
[0021] Furthermore, the outlet of the nitrogen storage tank 4 is connected to the inlet of the gas mixer 8 in the ammonia synthesis unit through the nitrogen compressor 5 and the first valve 18; the outlet of the hydrogen storage tank 6 is connected to the inlet of the gas mixer 8 in the ammonia synthesis unit through the hydrogen compressor 7 and the second valve 19. The above arrangement can achieve the same pressure of nitrogen and hydrogen, and can achieve proportional entry into the gas mixer 8, laying the foundation for subsequent synthesis of ammonia.
[0022] Furthermore, the ammonia synthesis unit includes a gas mixer 8, the outlet of the gas mixer 8 is connected to the ammonia synthesis reaction device 9, and the synthetic ammonia outlet of the ammonia synthesis reaction device 9 is connected to the ammonia storage tank 10. The ammonia synthesis reaction device 9 mainly includes an ammonia synthesis tower, a water cooler, an ammonia cooler, etc., which are prior arts and are therefore not described in detail.
[0023] Furthermore, the CO2 tail gas pipeline 13 of the low-temperature methanol washing device is connected to the inlet of the urea reaction production device 15 through the CO2 compressor 14, and the outlet of the ammonia storage tank 10 is connected to the inlet of the urea reaction production device 15. The CO2 from the CO2 compressor 14 and the liquid in the ammonia storage tank 10 of the utility model enter the urea reaction production device 15 as raw materials for producing urea; the low-temperature methanol washing device includes a methanol washing tower, a CO2 analysis tower, a thermal regeneration tower, etc., which are prior art and therefore will not be repeated; the urea reaction production device 15 includes a synthesis tower, a CO2 stripping tower, etc., which are prior art and therefore will not be repeated.
[0024] Furthermore, a tee is provided between the outlet of the hydrogen storage tank 6 and the hydrogen compressor 7, and the third end of the tee is connected to the inlet of the hydrogen peroxide production device 11 in the hydrogen peroxide production unit through the second pressure reducing valve 22; the oxygen storage tank 3 is connected to the inlet of the hydrogen peroxide production device 11 in the hydrogen peroxide production unit through the third pressure reducing valve 23. In the utility model, a part of the hydrogen in the hydrogen storage tank 6 enters the hydrogen peroxide production device 11 through the tee and the second pressure reducing valve 22, and the oxygen in the oxygen storage tank 3 is used as a raw material for producing hydrogen peroxide, and is decompressed by the third pressure reducing valve 23 and then sent to the hydrogen peroxide production device 11. The hydrogen peroxide production device 11 mainly includes a hydrogenation tower, an oxidation tower, an extraction tower, etc., which are prior arts and are therefore not described in detail.
[0025] Furthermore, the hydrogen peroxide production unit comprises a hydrogen peroxide production device 11 , and an outlet of the hydrogen peroxide production device 11 is connected to a hydrogen peroxide storage tank 12 .
[0026] Furthermore, the outlet of the hydrogen peroxide storage tank 12 is connected to the urea peroxide production device 16 through a fourth valve 24; the urea peroxide production device 16 mainly includes a reactor, a centrifuge, etc., which is the prior art and will not be described in detail.
[0027] Furthermore, the outlet of the urea reaction production device 15 is connected to the urea peroxide production device 16 through a third valve 20 ; the outlet of the urea peroxide production device 16 is connected to the urea peroxide packaging system 17 .
[0028] The working principle of the utility model is as follows: air enters the air separation device 1 to separate oxygen and nitrogen, wherein the pressure of oxygen is 6-9MPa, the purity is 99-99.9%, the pressure of nitrogen is 5-8MPa, the purity is 99-99.9%; the oxygen enters the oxygen storage tank 3 after being reduced to 1-2MPa by the first pressure reducing valve 21, and the nitrogen directly enters the nitrogen storage tank 4; the desalted water is decomposed into hydrogen and oxygen under the action of the water electrolysis hydrogen production device 2, the pressure of hydrogen and oxygen are both 1-2MP, and the purity is 99-99.999%; they enter the corresponding hydrogen storage tank 6 and oxygen storage tank 3 respectively; a part of the hydrogen storage tank 6 The hydrogen gas is decompressed to 0.2-0.6 MPa by the second pressure reducing valve 22 and then sent to the hydrogen peroxide production device 11. The oxygen in the oxygen storage tank 3 is decompressed to 0.2-0.6 MPa by the third pressure reducing valve 23 and then sent to the hydrogen peroxide production device 11. The hydrogen peroxide production device 11 includes equipment such as a hydrogenation tower and an oxidation tower, and its operating pressure is 0.2-0.6 MPa. The concentration of hydrogen peroxide produced by the hydrogen peroxide production device 11 is 27.5-35%. The hydrogen peroxide with a concentration of 27.5-35% enters the hydrogen peroxide storage tank 12. The nitrogen in the nitrogen storage tank 4 is pressurized to 12-18 MPa by the nitrogen compressor 5 and then enters the gas mixer 8. , another part of the hydrogen in the hydrogen storage tank 6 is pressurized to 12-18 MPa by the hydrogen compressor 7 and then enters the gas mixer 8; the N2:H2 in the gas mixer 8 is 1:3, and the mixed gas in the gas mixer 8 is passed through the ammonia synthesis reaction device 9 to obtain liquid ammonia, and the liquid ammonia enters the ammonia storage tank 10; the operating pressure in the ammonia synthesis reaction device 9 is 12-18 MPa; the CO2 tail gas in the CO2 tail gas pipeline 13 of the low-temperature methanol washing device mainly comes from the tail gas of the analytical tower in the low-temperature methanol washing device, and the CO2 purity in the tail gas is>97%, and the pressure is 0.1-0.7 MPa; the above tail gas passes through the CO2 compressor 14 After being pressurized to 13-16MPa, it enters the urea reaction production device 15 as a raw material; the liquid ammonia in the aforementioned ammonia storage tank 10 enters the urea reaction production device 15, the operating pressure inside the urea reaction production device 15 is 13-16MPa, and the outlet of the urea reaction production device 15 is a urea solution with a concentration of 65-80%; the aforementioned urine with a concentration of 65-80% and hydrogen peroxide with a concentration of 27.5-35% enter the urea peroxide production device 16 to produce urea peroxide, the reaction pressure is 0-0.5MPa (G), and the reaction temperature is 20-40°C; the produced urea peroxide enters the urea peroxide packaging system 17 for sale. The utility model uses water, air and CO2 as raw materials, synthesizes urea and hydrogen peroxide as two intermediate products, and then synthesizes urea peroxide; the above process has the advantages of reasonable and simple process design, tight coupling, short process, and high product added value.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A green urea peroxide production device, comprising a CO2 tail gas pipeline (13) of a low-temperature methanol washing device, an air separation device (1) and a water electrolysis hydrogen production device (2), characterized in that: The oxygen outlets of the air separation device (1) and the water electrolysis hydrogen production device (2) are respectively connected to the oxygen storage tank (3), the nitrogen outlet of the air separation device (1) is connected to the nitrogen storage tank (4), and the hydrogen outlet of the water electrolysis hydrogen production device (2) is connected to the hydrogen storage tank (6); The nitrogen storage tank (4) and the hydrogen storage tank (6) are connected to the ammonia synthesis unit, and the CO2 tail gas pipeline (13) of the low-temperature methanol washing device and the ammonia synthesis unit are connected to the urea reaction production device (15); The hydrogen storage tank (6) and the oxygen storage tank (3) are connected to the hydrogen peroxide production unit; The outlet of the urea reaction production device (15) and the hydrogen peroxide production unit are connected to the urea peroxide production device (16).
2. A green urea peroxide production device according to claim 1, characterized in that: The oxygen outlet of the air separation device (1) is connected to the oxygen storage tank (3) via a first pressure reducing valve (21).
3. A green urea peroxide production device according to claim 1, characterized in that: The outlet of the nitrogen storage tank (4) is connected to the inlet of the gas mixer (8) in the ammonia synthesis unit through the nitrogen compressor (5) and the first valve (18); The outlet of the hydrogen storage tank (6) is connected to the inlet of the gas mixer (8) in the ammonia synthesis unit through the hydrogen compressor (7) and the second valve (19).
4. A green urea peroxide production device according to claim 1 or 3, characterized in that: The ammonia synthesis unit comprises a gas mixer (8), the outlet of the gas mixer (8) is connected to an ammonia synthesis reaction device (9), and the synthetic ammonia outlet of the ammonia synthesis reaction device (9) is connected to an ammonia storage tank (10).
5. A green urea peroxide production device according to claim 4, characterized in that: The CO2 tail gas pipeline (13) of the low-temperature methanol washing device is connected to the inlet of the urea reaction production device (15) through the CO2 compressor (14), and the outlet of the ammonia storage tank (10) is connected to the inlet of the urea reaction production device (15).
6. A green urea peroxide production device according to claim 3, characterized in that: A tee is provided between the outlet of the hydrogen storage tank (6) and the hydrogen compressor (7), and the third end of the tee is connected to the inlet of the hydrogen peroxide production device (11) in the hydrogen peroxide production unit through a second pressure reducing valve (22); The oxygen storage tank (3) is connected to the inlet of the hydrogen peroxide production device (11) in the hydrogen peroxide production unit through a third pressure reducing valve (23).
7. A green urea peroxide production device according to claim 1 or 6, characterized in that: The hydrogen peroxide production unit comprises a hydrogen peroxide production device (11), and the outlet of the hydrogen peroxide production device (11) is connected to a hydrogen peroxide storage tank (12).
8. A green urea peroxide production device according to claim 7, characterized in that: The outlet of the hydrogen peroxide storage tank (12) is connected to the urea peroxide production device (16) via a fourth valve (24).
9. A green urea peroxide production device according to claim 1, characterized in that: The outlet of the urea reaction production device (15) is connected to the urea peroxide production device (16) via a third valve (20); The outlet of the urea peroxide production device (16) is connected to the urea peroxide packaging system (17).