Tail gas pickling device for diammonium hydrogen phosphate

Abstract

The utility model relates to diammonium hydrogen phosphate production technical field discloses tail gas pickling device for diammonium hydrogen phosphate, including support, pickling tower, pickling tower fixedly connected in the middle part of support, mounting block and demisting board, mounting block fixedly connected in the upper portion of pickling tower, demisting board installs in the inside of mounting block, link pipe and processing box, link pipe fixedly connected in the bottom of pickling tower, processing box fixedly connected in the bottom of link pipe, coarse filter board and fine filter board, coarse filter board is inserted in the inside left side of processing box, fine filter board is inserted in the inside right side of processing box, circulating pipe and liquid storage bucket, circulating pipe fixedly connected in the bottom right side of processing box. In the utility model, it realizes the filtration to the liquid after the spray neutralization, and then is transported to the inside of liquid storage bucket, avoids the blockage of spray head, thereby improves the work efficiency of equipment.

Description

Technical Field

[0001] This utility model relates to the field of diammonium hydrogen phosphate production technology, and in particular to a tail gas acid washing device for diammonium hydrogen phosphate. Background Technology

[0002] Diammonium hydrogen phosphate is a chemical fertilizer, appearing as a white or slightly gray crystalline or granular solid with a slight ammonia odor. It is easily soluble in water but insoluble in alcohol. In agriculture, it is a high-concentration nitrogen-phosphorus compound fertilizer, a fast-acting fertilizer, and widely used in various crops. In industry, it is used as a fire retardant, fermentation aid, and corrosion inhibitor, and as an extinguishing agent in dry powder fire extinguishers. During the production of diammonium hydrogen phosphate, exhaust gas is generated, which requires the use of an exhaust gas acid washing device for treatment.

[0003] In existing tail gas acid washing equipment, the tail gas is first transported to the bottom of the scrubbing tower by a fan. Then, a certain concentration of acid is sprayed from the top of the tower by spray nozzles installed inside the tower, so that the acid comes into full contact with the gas and the ammonia in the gas reacts with the acid. The clean gas after the reaction is discharged from the top of the tower by an exhaust fan.

[0004] Although existing tail gas acid washing devices can complete the tail gas treatment, they lack filtration of the neutralized solution, causing impurities generated after neutralization to enter the interior of the storage tank, clogging the spray heads and reducing the equipment's efficiency. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a tail gas acid washing device for diammonium hydrogen phosphate, which aims to improve the problem in the prior art that the lack of filtration of the neutralized solution leads to impurities generated after neutralization entering the interior of the storage tank and causing clogging of the spray head.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A tail gas acid washing device for diammonium hydrogen phosphate includes:

[0008] support;

[0009] A pickling tower, which is fixedly connected to the middle of the support frame;

[0010] The mounting block and the demister plate are fixedly connected to the upper part of the pickling tower, and the demister plate is installed inside the mounting block.

[0011] A connecting pipe and a treatment box are provided, wherein the connecting pipe is fixedly connected to the bottom of the pickling tower and the treatment box is fixedly connected to the bottom of the connecting pipe.

[0012] A coarse filter plate and a fine filter plate, wherein the coarse filter plate is inserted into the inside left side of the processing box, and the fine filter plate is inserted into the inside right side of the processing box;

[0013] A circulation pipe and a storage tank are provided, wherein the circulation pipe is fixedly connected to the bottom right side of the processing tank, and the storage tank is fixedly connected to the bottom of the circulation pipe.

[0014] The system also includes a spray assembly and a disassembly assembly, wherein the spray assembly is used to treat exhaust gas and the disassembly assembly is used to replace the demister plate.

[0015] Furthermore, the spraying assembly includes a circulation pump, which is fixedly connected to the outside of the storage tank, the input end of the circulation pump is fixedly connected to the inside of the storage tank, the output end of the circulation pump is fixedly connected to a delivery pipe, the top of the delivery pipe is fixedly connected to both sides of the inside of the pickling tower, and a spray nozzle is fixedly connected to the outside of the delivery pipe.

[0016] Furthermore, the disassembly and assembly assembly includes an installation cavity, which is opened on both sides inside the installation block. A movable block is slidably connected inside the installation cavity. An insert block is fixedly connected to the left side of the movable block, a spring is fixedly connected to the right side of the movable block, and a crossbar is fixedly connected to the front side of the movable block.

[0017] Furthermore, a fan is fixedly connected to the top left side of the support, the output end of the fan is fixedly connected to the inside of the pickling tower, and the input end of the fan is fixedly connected to a connecting pipe for collecting exhaust gas.

[0018] Furthermore, an exhaust fan is installed at the top of the pickling tower, and an air outlet pipe is fixedly connected to the output end of the exhaust fan.

[0019] Furthermore, a filling port is fixedly connected to the top of the liquid storage tank, and a sealing cap is installed on the outside of the filling port.

[0020] Furthermore, the mounting block has an external mounting hole, the demister plate is inserted into the mounting hole, and the demister plate has an external slot, the insertion block is inserted into the slot.

[0021] Furthermore, a through hole one is provided on the left side inside the mounting block, and the insert block is slidably connected inside the through hole one. A through hole two is provided on the front side outside the mounting block, and the crossbar is slidably connected inside the through hole two.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the sprayed liquid flows into the bottom of the pickling tower under gravity, enters the treatment tank through the connecting pipe, and passes through the coarse filter plate and the fine filter plate to filter impurities of different sizes. Then, it is transported to the storage tank by the circulation pipe. When cleaning, the filter plate can be pulled out directly from the top. When installing, simply insert it into the aligned hole. This design facilitates the filtration of liquid, prevents the spray head from clogging, and improves work efficiency.

[0024] 2. In this utility model, when replacing the demister plate, first move the crossbars to both sides simultaneously, causing the moving block to slide and compress the spring. After the insert block disengages from the slot, the demister plate can be removed by the handle. During installation, align the demister plate with the mounting hole of the mounting block and insert it. Release the crossbar, and under the reaction of the spring, the insert block will re-engage into the slot, completing the installation. This structure is easy to replace, ensures demister efficiency, prevents acid mist from escaping, and extends the service life of the acid washing tower. Attached Figure Description

[0025] Figure 1 This is a perspective view of the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the storage tank structure of the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the circulation pipe structure of the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the internal structure of the treatment box of the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the disassembled structure of the demister plate in the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model.

[0030] Figure 6 This is a schematic diagram of the internal structure of the mounting block of the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model.

[0031] Figure 7 This is a schematic diagram of the internal structure of the acid washing tower in the tail gas acid washing device for diammonium hydrogen phosphate proposed in this utility model.

[0032] Figure 8 for Figure 6 Enlarged view of the structure at point A in the middle.

[0033] Legend:

[0034] 1. Support frame; 2. Pickling tower; 3. Fan; 4. Connecting pipe; 5. Mounting block; 6. Demisting plate; 7. Air outlet pipe; 8. Exhaust fan; 9. Circulating pump; 10. Storage tank; 11. Filling port; 12. Delivery pipe; 13. Nozzle; 14. Connecting pipe; 15. Treatment box; 16. Circulating pipe; 17. Coarse filter plate; 18. Fine filter plate; 19. Mounting hole; 20. Mounting cavity; 21. Moving block; 22. Spring; 23. Crossbar; 24. Insert block; 25. Slot; 26. Through hole one; 27. Through hole two. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Reference Figures 1-4 This utility model provides an embodiment of a tail gas acid washing device for diammonium hydrogen phosphate, comprising: a support frame 1; an acid washing tower 2, fixedly connected to the middle of the support frame 1; a mounting block 5 and a demister plate 6, the mounting block 5 being fixedly connected to the upper part of the acid washing tower 2, and the demister plate 6 being installed inside the mounting block 5; a connecting pipe 14 and a treatment tank 15, the connecting pipe 14 being fixedly connected to the bottom of the acid washing tower 2, and the treatment tank 15 being fixedly connected to the bottom of the connecting pipe 14; a coarse filter plate 17 and a fine filter plate 18, the coarse filter plate 17 being inserted into the left side of the inside of the treatment tank 15, and the fine filter plate 18 being inserted into the right side of the inside of the treatment tank 15; a circulation pipe 16 and a storage tank 10, the circulation pipe 16 being fixedly connected to the bottom right side of the treatment tank 15, and the storage tank 10 being fixedly connected to the bottom of the circulation pipe 16; and a spray assembly and a disassembly assembly, the spray assembly being used for... For treating exhaust gas, the disassembly and assembly components are used to replace the demister plate 6. A fan 3 is fixedly connected to the top left side of the bracket 1. The output end of the fan 3 is fixedly connected to the inside of the pickling tower 2. The input end of the fan 3 is fixedly connected to the connecting pipe 4. The connecting pipe 4 is used to collect exhaust gas. When treating exhaust gas, firstly, the exhaust gas is sucked in through the connecting pipe 4 by starting the fan 3, and then transported to the inside of the pickling tower 2. An exhaust fan 8 is installed on the top of the pickling tower 2. The output end of the exhaust fan 8 is fixedly connected to the air outlet pipe 7. When discharging the treated gas, the exhaust fan 8 is started. The treated gas is sucked in by the rotation of the exhaust fan 8, and then discharged through the air outlet pipe 7. A filling port 11 is fixedly connected to the top of the liquid storage tank 10. A sealing cap is installed on the outside of the filling port 11. The filling port 11 facilitates the addition of liquid into the liquid storage tank 10.

[0037] Specifically, in the process of treating the sprayed liquid, firstly, the liquid generated by the spray falls naturally under the action of gravity and eventually collects at the bottom of the pickling tower 2. Then, through the connecting pipe 14, the liquid is transported to the treatment tank 15 located below. After entering the treatment tank 15, the liquid undergoes two-stage filtration for purification. First, the liquid is initially filtered by the coarse filter plate 17 to remove larger, easily deposited impurities and suspended particles. Then, it passes through the fine filter plate 18 to further filter out smaller, hard-to-visible contaminants, ensuring a more thorough filtration and a cleaner liquid. After the above two-stage filtration, the liquid is circulated through the circulation pipe located between the treatment tank 15 and the storage tank 10. 16. The liquid flows steadily into the storage tank 10 for temporary storage or later use. When the coarse filter plate 17 and fine filter plate 18 need to be cleaned or replaced for maintenance, the operator can directly pull out the coarse filter plate 17 and fine filter plate 18 from the top through the open structure at the top of the treatment box 15. The whole process is quick and simple, without disassembling other parts, thus effectively shortening the maintenance time. During the installation process, simply align the coarse filter plate 17 and fine filter plate 18 with the preset insertion holes on the upper part of the treatment box 15 and insert them stably to complete the installation. This achieves the filtration treatment of the spray neutralization liquid, avoids the clogging of the spray head by unfiltered impurities, ensures the normal operation and service life of the spray structure, and further improves the working efficiency of the entire equipment.

[0038] Reference Figures 1-7 The spray assembly includes a circulating pump 9, which is fixedly connected to the outside of the liquid storage tank 10. The input end of the circulating pump 9 is fixedly connected to the inside of the liquid storage tank 10. The output end of the circulating pump 9 is fixedly connected to a delivery pipe 12. The top of the delivery pipe 12 is fixedly connected to both sides inside the pickling tower 2. A nozzle 13 is fixedly connected to the outside of the delivery pipe 12. The nozzle 13 facilitates the spraying of liquid for the neutralization of exhaust gas.

[0039] Specifically, when treating the exhaust gas, the exhaust gas is transported to the interior of the pickling tower 2 by the blower 3. At this time, the circulation pump 9 is started, and the liquid is drawn from the interior of the storage tank 10 through the circulation pump 9. Then, the liquid is transported to the interior of the nozzle 13 through the delivery pipe 12. Finally, the liquid is sprayed out through the nozzle 13 and comes into contact with the exhaust gas inside the pickling tower 2, so that the ammonia in the exhaust gas and the acid liquid undergo a neutralization reaction, thereby completing the treatment of the exhaust gas. Finally, the exhaust fan 8 is started, and the treated gas is filtered through the demister plate 6 to remove the droplets and acid mist carried in the airflow, making the treated gas drier and cleaner. Finally, the gas is discharged through the exhaust pipe 7, thus completing the exhaust gas treatment.

[0040] Reference Figures 5-8The assembly includes a mounting cavity 20, which is located on both sides of the mounting block 5. A movable block 21 is slidably connected inside the mounting cavity 20. An insert block 24 is fixedly connected to the left side of the movable block 21, and a spring 22 is fixedly connected to the right side of the movable block 21. A crossbar 23 is fixedly connected to the front side of the movable block 21. The crossbar 23 facilitates the use of the operator. A mounting hole 19 is provided on the outside of the mounting block 5, and the demisting plate 6 is inserted into the mounting hole 19. The mounting hole 19 facilitates the movement of the demisting plate 6. A slot 25 is provided on the outside of the demisting plate 6, and the insert block 24 is inserted into the slot 25. A through hole 26 is provided on the left side of the inside of the mounting block 5, and the insert block 24 is slidably connected inside the through hole 26. The through hole 26 facilitates the movement of the insert block 24. A through hole 27 is provided on the front side of the outside of the mounting block 5, and the crossbar 23 is slidably connected inside the through hole 27. The through hole 27 facilitates the movement of the crossbar 23.

[0041] Specifically, when it is necessary to replace the demister plate 6 installed inside the pickling tower 2, the operator first needs to move the two horizontal bars 23 to both sides simultaneously with both hands. As the two horizontal bars 23 move, the two movable blocks 21 fixedly connected below them will also slide in the installation cavity 20 along the left and right direction. During this movement, the two movable blocks 21 will drive the two externally fixed inserts 24 to move synchronously. At the same time, due to the pushing action of the movable blocks 21, the two externally connected springs 22 are also continuously compressed, causing the springs 22 to deform under force and be in a compressed state. When the two inserts 24 gradually disengage from the two originally embedded slots 25 during the movement, the locking of the demister plate 6 can be released. At this time, the operator can pass through the demister plate. 6. External handle: Remove the demister plate 6 from the inside of the mounting block 5 for cleaning, replacement, or maintenance. When installing a new demister plate 6, the operator only needs to align the new demister plate 6 with the pre-set mounting hole 19 on the outside of the mounting block 5, and then firmly insert the demister plate 6 into the inside of the mounting block 5. After completing the initial positioning, release the two crossbars 23 that were previously moved to both sides. Under the elastic restoring force of the two springs 22, the two moving blocks 21 automatically return to their original positions, and the fixed inserts 24 on them also spring back and insert into the slots 25, forming a locked state. This completes the installation of the demister plate 6, making it easy to replace the demister plate 6 installed inside the acid washing tower 2, effectively maintaining its demisting efficiency, preventing acid mist from being carried out, and avoiding environmental pollution.

[0042] Working principle: When treating the sprayed liquid, the sprayed liquid first falls to the bottom of the pickling tower 2 under the action of gravity. Then, the liquid is transported to the inside of the treatment tank 15 through the connecting pipe 14. The liquid entering the treatment tank 15 first passes through the coarse filter plate 17 to filter out larger impurities, then passes through the fine filter plate 18 to filter out smaller contaminants. Finally, the filtered liquid is transported to the inside of the storage tank 10 through the circulation pipe 16. When it is necessary to clean the coarse filter plate 17 and the fine filter plate 18, they can be pulled out from the top of the treatment tank 15. During installation, the coarse filter plate 17 and the fine filter plate 18 are aligned with the insertion holes opened on the upper part of the treatment tank 15, and then inserted to complete the installation. This facilitates the filtration of the sprayed and neutralized liquid before it is transported to the inside of the storage tank 10, avoiding the clogging of the spray head and thus improving the working efficiency of the equipment.

[0043] When the defogger plate 6 needs to be replaced, firstly, move the two crossbars 23 synchronously to both sides. The movement of the two crossbars 23 carries the two movable blocks 21 fixed at the bottom inside the two mounting cavities 20. As the two movable blocks 21 move, they also move the two externally fixed insert blocks 24 synchronously. Simultaneously, the two movable blocks 21 compress the two externally fixed springs 22, causing the springs 22 to deform under pressure. Then, when the two insert blocks 24 disengage from the two slots 25, the defogger plate 6 can be removed from the mounting cavity using the externally fixed handle. The internal parts of block 5 are removed for replacement. During installation, the demister plate 6 is aligned with the mounting hole 19 on the outside of the mounting block 5. Then, the demister plate 6 is inserted into the interior of the mounting block 5. Next, the two crossbars 23 are released. Under the reaction force of the two springs 22, the two insert blocks 24 are inserted into the interior of the two slots 25, thus completing the installation of the demister plate 6. This facilitates the replacement of the demister plate 6 installed inside the acid washing tower 2, effectively maintaining its demisting efficiency, preventing acid mist from being carried out, avoiding environmental pollution, and thus extending the service life of the acid washing tower 2.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tail gas acid washing device for diammonium hydrogen phosphate, characterized in that, include: Scaffold (1); Pickling tower (2), which is fixedly connected to the middle of the support (1); Mounting block (5) and demister plate (6), wherein the mounting block (5) is fixedly connected to the upper part of the pickling tower (2), and the demister plate (6) is installed inside the mounting block (5); A connecting pipe (14) and a processing box (15) are provided, wherein the connecting pipe (14) is fixedly connected to the bottom of the pickling tower (2), and the processing box (15) is fixedly connected to the bottom of the connecting pipe (14); A coarse filter plate (17) and a fine filter plate (18) are provided, wherein the coarse filter plate (17) is inserted into the inside left side of the processing box (15) and the fine filter plate (18) is inserted into the inside right side of the processing box (15); A circulation pipe (16) and a storage tank (10) are provided, wherein the circulation pipe (16) is fixedly connected to the bottom right side of the processing tank (15), and the storage tank (10) is fixedly connected to the bottom of the circulation pipe (16); The system includes a spray assembly and a disassembly assembly, wherein the spray assembly is used to treat exhaust gas and the disassembly assembly is used to replace the demister (6).

2. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 1, characterized in that: The spray assembly includes a circulation pump (9), which is fixedly connected to the outside of the storage tank (10). The input end of the circulation pump (9) is fixedly connected to the inside of the storage tank (10). The output end of the circulation pump (9) is fixedly connected to a delivery pipe (12). The top of the delivery pipe (12) is fixedly connected to both sides inside the pickling tower (2). A nozzle (13) is fixedly connected to the outside of the delivery pipe (12).

3. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 1, characterized in that: The assembly and disassembly assembly includes an installation cavity (20), which is located on both sides of the inside of the installation block (5). A movable block (21) is slidably connected inside the installation cavity (20). An insert block (24) is fixedly connected to the left side of the movable block (21). A spring (22) is fixedly connected to the right side of the movable block (21). A crossbar (23) is fixedly connected to the front side of the movable block (21).

4. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 1, characterized in that: A fan (3) is fixedly connected to the top left side of the support (1). The output end of the fan (3) is fixedly connected to the inside of the pickling tower (2). A connecting pipe (4) is fixedly connected to the input end of the fan (3). The connecting pipe (4) is used to collect exhaust gas.

5. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 1, characterized in that: The top of the pickling tower (2) is equipped with an exhaust fan (8), and the output end of the exhaust fan (8) is fixedly connected to an air outlet pipe (7).

6. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 1, characterized in that: The top of the liquid storage tank (10) is fixedly connected to a filling port (11), and a sealing cap is installed on the outside of the filling port (11).

7. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 3, characterized in that: The mounting block (5) has a mounting hole (19) on its outside. The defogging plate (6) is inserted into the mounting hole (19). The defogging plate (6) has a slot (25) on its outside. The insert block (24) is inserted into the slot (25).

8. The tail gas acid washing device for diammonium hydrogen phosphate according to claim 3, characterized in that: The mounting block (5) has a through hole 1 (26) on the left side inside, and the insert block (24) is slidably connected inside the through hole 1 (26). The mounting block (5) has a through hole 2 (27) on the front side outside, and the crossbar (23) is slidably connected inside the through hole 2 (27).

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