Ammonium sulfate concentration device
By designing a concentrated device of ammonium sulfate, using multiple circulatory membrane concentration and electric heating and steam heat exchangers in the intermediate container to solve the problem of high energy consumption caused by low membrane concentration rate, realize efficient ammonium sulfate concentration and energy consumption consumption and energy consumption consumption reduce.
Patent Information
- Application Number
- CN202421151827.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Due to the low rate of film concentration and the low concentration after concentration of ammonium sulfate, the evaporation amount required for subsequent evaporation and crystallization processes is large, resulting in high steam consumption and high energy consumption cost in the evaporation process.
A concentrated device of ammonium sulfate is designed, concentrated through multiple cycles passed through the membrane concentrated device, and an electric heating device and steam heat exchanger are set in the intermediate container to achieve dual concentration of membrane concentration and heating and evaporation, reducing evaporation and energy. Consumption.
Through multiple cycle concentrations and heating treatment, the concentration of ammonium sulfate is significantly improved, the evaporation and energy consumption costs of subsequent evaporation crystalline processes are reduced, the concentration efficiency is improved, and steam waste is reduced.
Smart Images
Figure CN222400966U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of ammonium sulfate evaporation and crystallization technology, in particular to an ammonium sulfate concentration device. Background Art
[0002] Ammonium sulfate is mainly produced by absorbing by-products or waste gases emitted in industrial production with sulfuric acid or ammonia water (such as sulfuric acid absorbing ammonia in coke oven gas, ammonia water absorbing sulfur dioxide in smelter flue gas, ammonia in capron production or sulfuric acid waste liquid in sulfuric acid process titanium dioxide production). It is obtained by neutralizing ammonium hydroxide and sulfuric acid, crystallizing, centrifuging and drying.
[0003] In the process of preparing ammonium sulfate, the ammonium sulfate solution is usually concentrated to a certain concentration by using membrane concentration technology, then evaporated and crystallized by evaporation and crystallization, and finally separated and dried to obtain the solid ammonium sulfate product. Since the membrane concentration ratio is low, the concentration of ammonium sulfate after concentration is low, so the subsequent evaporation and crystallization process requires a large amount of evaporation, resulting in high steam consumption and high energy consumption cost of the evaporation process. Utility Model Content
[0004] Based on the above description, the utility model provides an ammonium sulfate concentration device to solve the problem that due to the low membrane concentration ratio, the concentration of ammonium sulfate after concentration is low, so the subsequent evaporation and crystallization process requires a large evaporation amount, resulting in high steam consumption and high energy consumption cost of the evaporation process.
[0005] The technical solution of the utility model to solve the above technical problems is as follows:
[0006] The present application provides an ammonium sulfate concentration device, and the technical solution adopted is as follows:
[0007] An ammonium sulfate concentration device, comprising:
[0008] A membrane concentration device, whose water production outlet is connected to a water production pool;
[0009] A water inlet pipe, one end of which is connected to the water inlet of the membrane concentration device, and the other end is connected to the stock liquid pool, and the water inlet pipe is provided with a first valve;
[0010] A water outlet pipe, one end of which is connected to the concentrated water outlet of the membrane concentration device, and the other end is connected to the concentrated water tank, and a second valve is provided on the water outlet pipe;
[0011] a first pipeline, one end of which is connected to the water outlet pipe and the other end of which is connected to an intermediate container, the connection point between the first pipeline and the water outlet pipe is located between the membrane concentration device and the second valve, and a third valve is provided on the first pipeline;
[0012] A second pipeline has one end connected to the intermediate container and the other end connected to the water inlet pipe. The connection point between the second pipeline and the water inlet pipe is located between the membrane concentration device and the first valve. A fourth valve is provided on the second pipeline.
[0013] Preferably, an electric heating device for heating the solution to evaporate it is provided in the intermediate container, and a steam exhaust pipe is connected to the intermediate container.
[0014] Preferably, a steam heat exchanger is connected to the first pipeline, and the first pipeline includes a first section and a second section, two ends of the first section are respectively connected to the water outlet pipe and the cold fluid inlet of the steam heat exchanger, two ends of the second section are respectively connected to the intermediate container and the cold fluid outlet of the steam heat exchanger, and the steam exhaust pipe is connected to the hot fluid inlet of the steam heat exchanger.
[0015] Preferably, the hot fluid outlet of the steam heat exchanger is connected to the water production pool through a condensation pipe.
[0016] Preferably, the steam exhaust pipe is connected to a third pipe, one end of the third pipe is connected to the steam exhaust pipe, and the other end is used to be connected to the plant steam system, the steam exhaust pipe is provided with a fifth valve located between the third pipe and the steam heat exchanger, and the third pipe is provided with a sixth valve.
[0017] Preferably, the first valve, the second valve, the third valve, the fourth valve, the fifth valve and the sixth valve are all electrically controlled valves.
[0018] Preferably, a conductivity meter for detecting the conductivity of the solution is provided in the intermediate container.
[0019] Preferably, a liquid level meter for detecting the liquid level is provided in the intermediate container.
[0020] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:
[0021] 1. When the present application is in operation, the first valve and the second valve are first opened, and the ammonium sulfate solution in the stock solution pool enters the membrane concentration device through the water inlet pipe. The concentrated water after being concentrated by the membrane concentration device is discharged from the water outlet pipe and enters the intermediate container through the first pipe. After the solution in the intermediate container reaches a certain amount, the first valve is closed and the fourth valve is opened. The solution in the intermediate container enters the water inlet pipe through the second pipe and is input into the membrane concentration device for further concentration. The concentrated concentrated water is returned to the intermediate container through the first pipe. After circulating for many times so that the concentration of the ammonium sulfate solution reaches the set value, the third valve is closed and the second valve is opened. The concentrated water in the intermediate container is input into the water inlet pipe through the second pipe and input into the membrane concentration device. After passing through the membrane concentration device, it is output from the water outlet pipe to the concentrated water pool. The concentrated water in the concentrated water pool is supplied to the ammonium sulfate evaporation and crystallization system for evaporation and crystallization. The water separated by the membrane concentration device enters the water production pool for subsequent treatment. By controlling the switch of the valve, the present application can make the ammonium sulfate solution circulate through the membrane concentration device for multiple times for concentration treatment, thereby obtaining concentrated water with a higher ammonium sulfate concentration, so as to reduce the evaporation amount required for the subsequent evaporation and crystallization process, and reduce steam consumption and energy consumption costs.
[0022] 2. The present application heats the solution concentrated by the membrane concentration device by arranging an electric heating device in the intermediate container, so that part of the water therein evaporates to form water vapor, and the water vapor is discharged through the steam discharge pipe, so that the concentrated water is further concentrated, and the solution circulates through the membrane concentration device and the intermediate container, and is quickly concentrated to the set concentration through membrane concentration and heating evaporation concentration; and by arranging a steam heat exchanger on the first pipeline, the steam generated by the evaporation of the solution in the intermediate container is used as the working medium of the steam heat exchanger to heat the concentrated water entering the intermediate container through the first pipeline, and the concentrated water entering the intermediate container is preheated by the steam heat, so that the concentrated water quickly reaches the evaporation temperature in the intermediate container, and the waste of heat is reduced; and by arranging a third pipeline, when the sixth valve is closed, during the process of the solution circulating through the membrane concentration device and the intermediate container, the steam generated by the evaporation of the concentrated water in the intermediate container heats the water entering the intermediate container through the steam heat exchanger, so that the concentrated water quickly reaches the evaporation temperature in the intermediate container, and the concentration efficiency is improved. When the sixth valve is opened and the fifth valve is closed, the steam can be input into the steam system in the plant through the third pipeline, and can be used as steam for subsequent evaporation and crystallization, thereby avoiding steam waste and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic structural diagram of an ammonium sulfate concentration device provided in an embodiment of the utility model.
[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:
[0025] 1. Membrane concentration device; 2. Water inlet pipe; 21. First valve; 3. Water outlet pipe; 31. Second valve; 4. First pipeline; 41. Third valve; 5. Intermediate container; 6. Second pipeline; 61. Fourth valve; 62. Circulation pump; 7. Electric heating device; 8. Steam discharge pipe; 81. Fifth valve; 9. Steam heat exchanger; 10. Condensation pipeline; 11. Third pipeline; 111. Sixth valve; 12. Conductivity meter; 13. Liquid level meter; 14. Raw liquid tank; 15. Water production tank; 16. Concentrated water tank. DETAILED DESCRIPTION
[0026] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0028] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.
[0029] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.
[0030] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.
[0031] Reference Figure 1 As shown, an embodiment of the present application provides an ammonium sulfate concentration device, which includes a membrane concentration device 1, an inlet pipe 2, an outlet pipe 3, an intermediate container 5, a first pipeline 4 and a second pipeline 6, the water output outlet of the membrane concentration device 1 is connected to the water output pool 15, one end of the inlet pipe 2 is connected to the water inlet of the membrane concentration device 1, and the other end is connected to the raw liquid pool 14, a first valve 21 is provided on the inlet pipe 2, one end of the outlet pipe 3 is connected to the concentrated water outlet of the membrane concentration device 1, and the other end is connected to the concentrated water pool 16, a second valve 31 is provided on the outlet pipe 3, one end of the first pipeline 4 is connected to the outlet pipe 3, and the other end is connected to the intermediate container 5, the connection point between the first pipeline 4 and the outlet pipe 3 is located between the membrane concentration device 1 and the second valve 31, a third valve 41 is provided on the first pipeline 4, one end of the second pipeline 6 is connected to the intermediate container 5, and the other end is connected to the inlet pipe 2, the connection point between the second pipeline 6 and the inlet pipe 2 is located between the membrane concentration device 1 and the first valve 21, and a fourth valve 61 is provided on the second pipeline 6.
[0032] Through the above arrangement, during operation, the first valve 21 and the second valve 31 are first opened, and the ammonium sulfate solution in the stock solution pool 14 enters the membrane concentration device 1 through the water inlet pipe 2. The concentrated water after being concentrated by the membrane concentration device 1 is discharged from the water outlet pipe 3 and enters the intermediate container 5 through the first pipeline 4. After the solution in the intermediate container 5 reaches a certain amount, the first valve 21 is closed and the fourth valve 61 is opened. The solution in the intermediate container 5 enters the water inlet pipe 2 through the second pipeline 6 and is input into the membrane concentration device 1 for further concentration. The concentrated concentrated water is returned to the intermediate container 5 through the first pipeline 4. After the ammonium sulfate solution concentration reaches the set value after multiple cycles, The third valve 41 is closed and the second valve 31 is opened. The concentrated water in the intermediate container 5 is input into the water inlet pipe 2 through the second pipe 6 and then into the membrane concentration device 1. After passing through the membrane concentration device 1, it is output from the water outlet pipe 3 to the concentrated water pool 16. The concentrated water in the concentrated water pool 16 is supplied to the ammonium sulfate evaporation and crystallization system for evaporation and crystallization. The water separated by the membrane concentration device 1 enters the water production pool 15 for subsequent treatment. By controlling the opening and closing of the valve, the ammonium sulfate solution can be circulated through the membrane concentration device 1 for concentration treatment for multiple times, thereby obtaining concentrated water with a higher ammonium sulfate concentration, so as to reduce the evaporation amount required for the subsequent evaporation and crystallization process, and reduce steam consumption and energy consumption costs.
[0033] Reference Figure 1As shown, specifically, a circulation pump 62 is connected to the second pipeline 6 to pump out the solution in the intermediate container 5 and transport it to the water inlet pipe 2 .
[0034] Reference Figure 1 As shown, further, an electric heating device 7 for heating the solution to make it evaporate is provided in the intermediate container 5, and a steam exhaust pipe 8 is connected to the intermediate container 5; specifically, the electric heating device 7 is arranged at the bottom of the intermediate container 5, and can be arranged in a coiled manner using an electric heating wire or an electric heating tube, so that it has a sufficiently large contact area with the solution. By arranging the electric heating device 7 in the intermediate container 5, the solution concentrated by the membrane concentration device 1 is heated, so that part of the water therein evaporates to form water vapor, and the water vapor is discharged through the steam exhaust pipe 8, so that the concentrated water is further concentrated, and the solution circulates through the membrane concentration device 1 and the intermediate container 5, and is double concentrated by membrane concentration and heating evaporation concentration, so as to be quickly concentrated to the set concentration, thereby reducing the number of cycles.
[0035] Reference Figure 1 As shown, further, in order to avoid heat waste of exhaust steam, a steam heat exchanger 9 is connected to the first pipe 4, and the first pipe 4 includes a first section and a second section. The two ends of the first section are respectively connected to the water outlet pipe 3 and the cold fluid inlet of the steam heat exchanger 9, and the two ends of the second section are respectively connected to the intermediate container 5 and the cold fluid outlet of the steam heat exchanger 9. The steam exhaust pipe 8 is connected to the hot fluid inlet of the steam heat exchanger 9; the hot fluid outlet of the steam heat exchanger 9 is connected to the water production pool 15 through the condensation pipe 10. Specifically, the steam exhaust pipe 8 is connected to the top of the intermediate container 5, and the steam in the intermediate container 5 is input into the steam heat exchanger 9 through the steam exhaust pipe 8. The steam is used as a heating working medium to heat the solution in the cold fluid pipeline flowing through the steam heat exchanger 9, so that the temperature of the solution entering the intermediate container 5 is increased, and the solution in the intermediate container 5 is quickly heated to the evaporation temperature, that is, the water vapor generated by evaporation by the heating device is used to pre-heat the solution entering the intermediate container 5, thereby avoiding the waste of steam heat, accelerating the evaporation rate of the solution in the intermediate container 5, and improving the concentration efficiency; the steam and condensed water after passing through the steam heat exchanger 9 are discharged into the water production pool 15 through the condensation pipe 10 for subsequent treatment.
[0036] Reference Figure 1As shown, further, the steam discharge pipe 8 is also connected to a third pipe 11, one end of the third pipe 11 is connected to the steam discharge pipe 8, and the other end is used to connect to the steam system in the plant area. The steam discharge pipe 8 is provided with a fifth valve 81 located between the third pipe 11 and the steam heat exchanger 9, and the third pipe 11 is provided with a sixth valve 111. When the sixth valve 111 is closed, during the process of the solution circulating through the membrane concentration device 1 and the intermediate container 5, the steam generated by the evaporation of the concentrated water in the intermediate container 5 heats the water entering the intermediate container 5 through the steam heat exchanger 9, so that the concentrated water in the intermediate container 5 quickly reaches the evaporation temperature, thereby improving the concentration efficiency. When the sixth valve 111 is opened and the fifth valve 81 is closed, the steam can be input into the steam system in the plant area through the third pipe 11, and can be used as steam for subsequent evaporation and crystallization, thereby avoiding steam waste and reducing energy consumption.
[0037] Reference Figure 1 As shown, further, in order to realize the automatic operation of the entire concentration process, a conductivity meter 12 for detecting the conductivity of the solution and a liquid level meter 13 for detecting the liquid level are provided in the intermediate container 5, and the first valve 21, the second valve 31, the third valve 41, the fourth valve 61, the fifth valve 81 and the sixth valve 111 are all electrically controlled valves.
[0038] When concentrating the solution, during the initial liquid inflow, the control system controls the second valve 31, the fourth valve 61 and the sixth valve 111 to be closed, and the other valves to be opened. The raw liquid is output from the raw liquid pool 14 and input into the membrane concentration device 1 through the water inlet pipe 2 for concentration. The concentrated water input of the membrane concentration device 1 is input into the intermediate container 5 through the water outlet pipe 3 and the first pipeline 4. The conductivity meter 12 in the intermediate container 5 detects the solution conductivity in real time to obtain the solution concentration, and the liquid level meter 13 detects the liquid level in the intermediate container 5 in real time. After the liquid level in the intermediate container 5 reaches the set value, the control system controls the first valve 21, the second valve 31 and the sixth valve 111 to be closed, and the other valves to be opened, and the circulation pump 62 is turned on to transfer the solution in the intermediate container 5. The solution is pumped out to the second pipeline 6, and then enters the water inlet pipe 2 again and is input into the membrane concentration device 1. At the same time, the electric heating device 7 is turned on to heat the solution in the intermediate container 5 to evaporate the water. The solution circulates through the membrane concentration device 1 and the intermediate container 5 to concentrate the solution multiple times. When the conductivity of the solution in the intermediate container 5 reaches the set value, the concentration of the solution reaches the set requirement, the control system controls the first valve 21, the third valve 41 and the fifth valve 81 to be closed, and the other valves to be opened. The concentrated water is output from the intermediate container 5, passes through the second pipeline 6, the water inlet pipe 2 and the membrane concentration device 1, and is then output from the water outlet pipe 3 and input into the concentrated water pool 16. The concentrated water in the concentrated water pool 16 is supplied to the ammonium sulfate evaporation and crystallization system for evaporation and crystallization.
[0039] The above process can be controlled automatically by the control system, and the raw liquid input into the concentration device of the present application is concentrated to a set concentration and then output, thereby realizing automatic control of the concentration process and improving the concentration efficiency.
[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An ammonium sulfate concentration device, characterized in that: include: A membrane concentration device (1), wherein the water production outlet is connected to a water production pool (15); A water inlet pipe (2), one end of which is connected to the water inlet of the membrane concentration device (1), and the other end of which is connected to the stock solution pool (14), and a first valve (21) is provided on the water inlet pipe (2); A water outlet pipe (3), one end of which is connected to the concentrated water outlet of the membrane concentration device (1), and the other end of which is connected to the concentrated water tank (16), and a second valve (31) is provided on the water outlet pipe (3); a first pipeline (4), one end of which is connected to the water outlet pipe (3) and the other end of which is connected to an intermediate container (5); the connection point between the first pipeline (4) and the water outlet pipe (3) is located between the membrane concentration device (1) and the second valve (31); and a third valve (41) is provided on the first pipeline (4); A second pipeline (6) has one end connected to the intermediate container (5) and the other end connected to the water inlet pipe (2); the connection point between the second pipeline (6) and the water inlet pipe (2) is located between the membrane concentration device (1) and the first valve (21); and a fourth valve (61) is provided on the second pipeline (6).
2. The ammonium sulfate concentration device according to claim 1, characterized in that: An electric heating device (7) for heating the solution to evaporate it is arranged inside the intermediate container (5), and a steam exhaust pipe (8) is connected to the intermediate container (5).
3. The ammonium sulfate concentration device according to claim 2, characterized in that: The first pipeline (4) is connected to a steam heat exchanger (9), and the first pipeline (4) comprises a first section and a second section, wherein two ends of the first section are respectively connected to the water outlet pipe (3) and the cold fluid inlet of the steam heat exchanger (9), and two ends of the second section are respectively connected to the intermediate container (5) and the cold fluid outlet of the steam heat exchanger (9), and the steam discharge pipe (8) is connected to the hot fluid inlet of the steam heat exchanger (9).
4. The ammonium sulfate concentration device according to claim 3, characterized in that: The hot fluid outlet of the steam heat exchanger (9) is connected to the water production pool (15) through a condensation pipe (10).
5. The ammonium sulfate concentration device according to claim 3, characterized in that: The steam discharge pipe (8) is connected to a third pipe (11); one end of the third pipe (11) is connected to the steam discharge pipe (8), and the other end is used to be connected to a plant steam system; a fifth valve (81) located between the third pipe (11) and the steam heat exchanger (9) is provided on the steam discharge pipe (8); and a sixth valve (111) is provided on the third pipe (11).
6. The ammonium sulfate concentration device according to claim 5, characterized in that: The first valve (21), the second valve (31), the third valve (41), the fourth valve (61), the fifth valve (81) and the sixth valve (111) are all electrically controlled valves.
7. The ammonium sulfate concentration device according to claim 1, characterized in that: The intermediate container (5) is provided with a conductivity meter (12) for detecting the conductivity of the solution.
8. The ammonium sulfate concentration device according to claim 1, characterized in that: A liquid level meter (13) for detecting the liquid level is arranged in the intermediate container (5).