Device for producing ammonium bicarbonate from high-concentration CO2

Abstract

The utility model relates to a device for producing ammonium bicarbonate from high-concentration CO2, which comprises a main carbonization tower, a standby carbonization tower, a fixed auxiliary tower, a recovery tower, a buffer tank, a synthetic ammonia gas holder and a compressor, a gas inlet of the main carbonization tower is provided with a raw material pipeline, the main carbonization tower is connected with the standby carbonization tower through a pipeline, the standby carbonization tower is connected with the fixed auxiliary tower through a pipeline, and the recovery tower is connected with the fixed auxiliary tower through a pipeline. The fixed auxiliary tower is connected with the recovery tower through a pipeline, the recovery tower is connected with the buffer tank through a pipeline, the buffer tank is connected with the synthetic ammonia gas holder and the compressor through pipelines, and a gas outlet of the compressor is provided with a circulating pipeline communicated with a raw material pipeline. The buffer tank, the synthetic ammonia gas cabinet and the compressor are arranged between the recovery tower and the main carbonization tower, and the circulating pipeline is connected with the raw material pipeline, so that the dilution of high-concentration CO2 can be realized by effectively utilizing related gas generated in the reaction process, the product quality of ammonium bicarbonate is better, the recycling of the gas is realized, and the production cost is reduced. The feed gas consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonium bicarbonate preparation, in particular to a device for producing ammonium bicarbonate by using high-concentration CO2. Background Art

[0002] Ammonium bicarbonate is a nitrogen-containing chemical fertilizer with the molecular formula NH4HCO3. It is in the form of white powder or block crystals, has a strong ammonia odor, is easily soluble in water, contains about 17.7% nitrogen, and can be used as a nitrogen fertilizer. It is suitable for all kinds of soils and can provide the ammonium nitrogen and carbon dioxide required for crop growth at the same time. It is the most widely used nitrogen fertilizer product in my country besides urea.

[0003] In the production process of ammonium bicarbonate, carbon dioxide needs to be contacted with ammonia water to react and generate ammonium bicarbonate crystals in the carbonization tower. In order to fully utilize the carbon dioxide generated in the production process, the carbon dioxide raw material is generally transported directly to the carbonization tower. However, since the concentration of the directly transported carbon dioxide is too high, its carbonization reaction is too fast, causing the carbonization tower to scabbing and worsen the working condition, making it impossible to produce normally. In addition, the product has fine crystals, low nitrogen content, high water content, and is difficult to separate, which seriously affects the product quality. Utility Model Content

[0004] Based on the above description, the utility model provides a device for producing ammonium bicarbonate with high-concentration CO2 to solve the problem that the excessively high CO2 concentration is not conducive to normal production and affects the product quality.

[0005] The utility model solves the above-mentioned technical problems with a technical solution as follows: a device for producing ammonium bicarbonate from high-concentration CO2, comprising a main carbonization tower, a standby carbonization tower, a fixed sub-tower, a recovery tower, a buffer tank, a synthetic ammonia cabinet and a compressor, wherein the air inlet of the main carbonization tower is provided with a raw material pipeline, the main carbonization tower and the standby carbonization tower are connected by a pipeline, the standby carbonization tower and the fixed sub-tower are connected by a pipeline, the fixed sub-tower and the recovery tower are connected by a pipeline, the recovery tower and the buffer tank are connected by a pipeline, the buffer tank and the synthetic ammonia cabinet and the compressor are all connected by pipelines, and the air outlet of the compressor is provided with a circulation pipeline connected to the raw material pipeline.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the recovery tower is also provided with a cleaning section, which includes a water pipe, a plurality of nozzles are provided on the surface of the water pipe, a convex plate is provided on the surface of the recovery tower, a circulating pump is provided on the surface of the convex plate, a water inlet of the circulating pump is connected to the recovery tower through a connecting pipe 1, and a water outlet of the circulating pump is connected to one end of the water pipe through a connecting pipe 2.

[0008] Furthermore, a plurality of threaded rods are provided on the surface of the recovery tower, a mounting plate is provided on the surface of the water pipe, a plurality of openings are penetrated through the surface of the mounting plate, the mounting plate is set between the plurality of threaded rods, and nuts are provided on the surface of the threaded rods.

[0009] Furthermore, a rubber pad is provided on the surface of the nut, and a side of the rubber pad away from the nut is in close contact with a surface of the mounting plate.

[0010] Furthermore, a handle is provided on the surface of the mounting plate.

[0011] Furthermore, a card slot is provided on the surface of the connecting pipe 1, a connecting frame is provided in the card slot, and a filter net is provided in the connecting frame.

[0012] Furthermore, a second mounting plate is provided on the surface of the connection frame, the second mounting plate is designed as an arc-shaped structure, and bolts are provided between the second mounting plate and the first connecting pipe.

[0013] Furthermore, a handle 2 is provided on the surface of the second mounting plate.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] By setting a buffer tank, a synthetic ammonia tank and a compressor between the recovery tower and the main carbonization tower, and connecting the circulating pipeline with the raw material pipeline, the relevant gases generated during the reaction process can be effectively utilized to achieve the dilution effect of high-concentration CO2, thereby reducing the concentration of CO2 entering the raw material tank, making the product quality of ammonium bicarbonate better, realizing the recycling of gas, and reducing raw gas consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall block diagram structure of the utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of the recovery tower of the utility model;

[0018] Figure 3 This is a schematic diagram of the positional relationship between the recovery tower and the cleaning section of the utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure between the water pipe and the circulation pump of the utility model;

[0020] Figure 5 For this utility model Figure 3 The enlarged structural diagram at A in the middle;

[0021] Figure 6 For this utility model Figure 4Enlarged structural diagram at B in the middle.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Main carbonization tower; 2. Backup carbonization tower; 3. Fixed auxiliary tower; 4. Recovery tower; 41. Convex plate; 42. Threaded rod; 5. Buffer tank; 6. Synthetic ammonia cabinet; 7. Compressor; 8. Raw material pipeline; 9. Circulation pipeline; 10. Water pipe; 101. Mounting plate one; 1011. Opening; 102. Nozzle; 11. Circulation pump; 111. Connecting pipe one; 112. Connecting pipe two; 12. Nut; 121. Rubber pad; 13. Handle one; 14. Slot; 15. Connection frame; 16. Filter; 17. Mounting plate two; 18. Bolt; 19. Handle two. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] This embodiment provides a device for producing ammonium bicarbonate from high-concentration CO2. The device for producing ammonium bicarbonate from high-concentration CO2 can recycle part of the gas and ensure the product quality of ammonium bicarbonate. Specifically, Figure 1As shown, it includes a main carbonization tower 1, a standby carbonization tower 2, a fixed sub-tower 3, a recovery tower 4, a buffer tank 5, a synthetic ammonia cabinet 6 and a compressor 7. The air inlet of the main carbonization tower 1 is provided with a raw material pipeline 8, the air outlet of the main carbonization tower 1 is connected to the air inlet of the standby carbonization tower 2 by a pipeline, the standby carbonization tower 2 is provided with concentrated ammonia water, the air outlet of the standby carbonization tower 2 is connected to the air inlet of the fixed sub-tower 3 by a pipeline, the air outlet of the fixed sub-tower 3 is connected to the air inlet of the recovery tower 4 by a pipeline, the fixed sub-tower 3 and the recovery tower 4 are both provided with dilute ammonia water, the air outlet of the recovery tower 4 is connected to the air inlet of the buffer tank 5 by a pipeline, the recovery tower 4 is also provided with a cleaning section, the cleaning section includes a water pipe 10, a plurality of nozzles 102 are equidistantly arranged on the surface of the water pipe 10, a convex plate 41 is provided on the surface of the recovery tower 4, a circulating pump 11 is installed on the surface of the convex plate 41, and the model of the circulating pump 11 is YL -zyb4, the water inlet of the circulation pump 11 is connected to the recovery tower 4 through the connecting pipe 111, and the water outlet of the circulation pump 11 is connected to one end of the water pipe 10 through the connecting pipe 2 112, so as to realize the recycling of the dilute ammonia water in the recovery tower 4, thereby utilizing the dilute ammonia water to realize the bottom cleaning effect of CO2, a buffer solution is provided in the buffer tank 5, and two air outlets are provided on the surface of the buffer tank 5, and the two air outlets of the buffer tank 5 are respectively connected to the air inlets of the synthetic ammonia cabinet 6 and the compressor 7 through pipelines, the synthetic ammonia cabinet 6 is filled with reaction medium, and the air outlet of the compressor 7 is provided with a circulation pipeline 9 connected to the raw material pipeline 8, so as to effectively utilize the buffer tank 5, the synthetic ammonia cabinet 6 and the compressor 7 arranged between the recovery tower 4 and the main carbonization tower 1 to realize the circulation of the gas, realize the dilution effect of the high-purity CO2, ensure the product quality, and reduce the raw gas consumption.

[0027] like Figure 2 , Figure 3 and Figure 5 As shown, in this embodiment, two threaded rods 42 are provided on the surface of the recovery tower 4, and a mounting plate 101 is provided on the surface of the water pipe 10. Two openings 1011 are formed through the surface of the mounting plate 101. The mounting plate 101 is sleeved between the two threaded rods 42. Nuts 12 are provided on the surface of the threaded rods 42. Rubber pads 121 are provided on the surface of the nut 12. The side of the rubber pad 121 away from the nut 12 is in close contact with the surface of the mounting plate 101, so that the water pipe 10 included in the cleaning section and the recovery tower 4 have a detachable effect, which is convenient for the cleaning and maintenance of the water pipe 10 in the later stage.

[0028] like Figure 2 , Figure 4 and Figure 6As shown, in this embodiment, a groove 14 is provided on the surface of the connecting pipe 111, and a connecting frame 15 with a diameter matched with the diameter of the connecting pipe 111 is provided in the groove 14. A filter screen 16 is provided in the connecting frame 15, and a mounting plate 17 is provided on the surface of the connecting frame 15. The mounting plate 17 is designed as an arc structure, and bolts 18 are provided between the mounting plate 17 and the connecting pipe 111, so as to achieve a filtering effect on impurities in the connecting pipe 111, and avoid accidental blockage of the nozzle 102 due to the decomposed impurities in the dilute ammonia water when the circulating pump 11 is used to circulate the dilute ammonia water.

[0029] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, a handle 13 is provided on the surface of the mounting plate 101, and a handle 2 19 is provided on the surface of the mounting plate 17, so that it is more convenient for the staff to disassemble the water pipe 10 and the filter 16 later.

[0030] During the use of the above-mentioned device for producing ammonium bicarbonate from high-concentration CO2, the compressor 7 is turned on, and high-concentration CO2 with a concentration of ≥98% is introduced into the main carbonization tower 1 through the raw material pipeline 8, and then enters the standby carbonization tower 2 through the outlet of the main carbonization tower 1 through a pipeline, so that the high-concentration CO2 contacts and reacts with the concentrated ammonia water in the standby carbonization tower 2 to generate heat, and gradually generates ammonium bicarbonate crystals, and the ammonia gas at high temperature will also generate part of nitrogen and hydrogen. Subsequently, part of the residual CO2 and ammonia gas and a certain amount of nitrogen and hydrogen enter the fixed sub-tower 3 and the recovery tower 4 in turn through the pipeline, and the residual CO2 and ammonia gas are absorbed and treated in turn by the dilute ammonia water inside, and part of the residual CO2 reacts with the dilute ammonia water to produce a small amount of ammonium bicarbonate. Finally, the residual CO2 and ammonia gas are finally cleaned by the cleaning part on the recovery tower 4, so that the concentration is reduced to within the range of relevant process indicators, and then the tail gas discharged from the top of the recovery tower 4 enters the buffer tank 5 through a pipeline, and the buffer solution in the buffer tank 5 is used to realize the various The buffering effect of impurities is achieved by buffering impurities to protect the compressor 7. Subsequently, part of the hydrogen and nitrogen enter the synthetic ammonia cabinet 6 and react with the reaction medium inside it to generate a certain amount of synthetic ammonia and store it for subsequent use. Part of the nitrogen and ammonia in the flow process enter the compressor 7, and the compressor 7 is used to push the nitrogen and ammonia to the raw material pipeline 8 through the circulation pipeline 9 to achieve the dilution effect of the high concentration of CO2, so that the high-purity CO2 is reduced, so that the CO2 with reduced purity enters the main carbonization tower 1 again to react and generate carbonized liquid, so that the relatively low CO2 can circulate in the main carbonization tower 1, the standby carbonization tower 2, the fixed sub-tower 3 and the recovery tower 4 and the pipelines of each equipment, and the diluted CO2 gas is respectively absorbed by the carbonization liquid in the main carbonization tower 1 and the concentrated ammonia water in the standby carbonization tower 2, and crystallization is achieved in each tower, so as to ensure the service life of each preparation tower, improve product quality, reduce the consumption of raw gas, and reduce the loss of ammonia. The overall practicality is stronger and more conducive to popularization and use.

[0031] 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. A device for producing ammonium bicarbonate from high-concentration CO2, characterized in that: It comprises a main carbonization tower (1), a standby carbonization tower (2), a fixed auxiliary tower (3), a recovery tower (4), a buffer tank (5), a synthetic ammonia tank (6) and a compressor (7), wherein the air inlet of the main carbonization tower (1) is provided with a raw material pipeline (8); The main carbonization tower (1) and the auxiliary carbonization tower (2) are connected via a pipeline, the auxiliary carbonization tower (2) and the fixed auxiliary tower (3) are connected via a pipeline, the fixed auxiliary tower (3) and the recovery tower (4) are connected via a pipeline, the recovery tower (4) and the buffer tank (5) are connected via a pipeline, the buffer tank (5) and the synthetic ammonia tank (6) and the compressor (7) are all connected via pipelines, and the gas outlet of the compressor (7) is provided with a circulation pipeline (9) connected to the raw material pipeline (8).

2. The device for producing ammonium bicarbonate from high-concentration CO2 according to claim 1, characterized in that: The recovery tower (4) is also provided with a cleaning section, the cleaning section comprising a water pipe (10), a surface of the water pipe (10) being provided with a plurality of nozzles (102), a surface of the recovery tower (4) being provided with a convex plate (41), a surface of the convex plate (41) being provided with a circulation pump (11), a water inlet of the circulation pump (11) being connected to the recovery tower (4) via a connecting pipe 1 (111), and a water outlet of the circulation pump (11) being connected to one end of the water pipe (10) via a connecting pipe 2 (112).

3. A device for producing ammonium bicarbonate from high-concentration CO2 according to claim 2, characterized in that: The surface of the recovery tower (4) is provided with a plurality of threaded rods (42), the surface of the water pipe (10) is provided with a mounting plate 1 (101), the surface of the mounting plate 1 (101) is penetrated by a plurality of openings (1011), the mounting plate 1 (101) is sleeved between the plurality of threaded rods (42), and the surface of the threaded rods (42) is provided with nuts (12).

4. The device for producing ammonium bicarbonate from high-concentration CO2 according to claim 3, characterized in that: A rubber pad (121) is provided on the surface of the nut (12), and a surface of the rubber pad (121) away from the nut (12) is in close contact with the surface of the first mounting plate (101).

5. The device for producing ammonium bicarbonate from high-concentration CO2 according to claim 3, characterized in that: A handle 1 (13) is provided on the surface of the mounting plate 1 (101).

6. The device for producing ammonium bicarbonate from high-concentration CO2 according to claim 2, characterized in that: A slot (14) is provided on the surface of the connecting pipe 1 (111), a connecting frame (15) is provided in the slot (14), and a filter screen (16) is provided in the connecting frame (15).

7. The device for producing ammonium bicarbonate from high-concentration CO2 according to claim 6, characterized in that: A second mounting plate (17) is provided on the surface of the connection frame (15); the second mounting plate (17) is designed as an arc-shaped structure; bolts (18) are provided between the second mounting plate (17) and the first connection pipe (111).

8. The device for producing ammonium bicarbonate from high-concentration CO2 according to claim 7, characterized in that: A second handle (19) is provided on the surface of the second mounting plate (17).

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