Tail gas treatment device for potash fertilizer production system

Abstract

The utility model discloses a tail gas treatment device for a potash fertilizer production system. The device comprises a washing and spraying tower, the air inlet pipe is fixed on the outer wall of the bottom of the spray tower; the number of the partition plates is four, the four partition plates are evenly arranged in the washing and spraying tower, a top plate is welded to the tops of the four partition plates, and the top plate is horizontally welded to the inner wall of the washing and spraying tower. The four partition plates are vertically fixed in the washing and spraying tower to form a plurality of flowing channels, under the action of the exchange holes, the flowing distance of tail gas entering the washing and spraying tower from the gas inlet pipe is increased, and absorption liquid in the collecting tank is conveyed into the spraying pipe to be sprayed through the pump machine, the liquid suction pipe and the liquid conveying pipe, so that the tail gas is prevented from entering the washing and spraying tower. And each spraying pipe can independently spray absorption liquid to the separated space, so that the tail gas can be sprayed and neutralized when flowing through different channels, the contact reaction time of the tail gas and the absorption liquid is prolonged, and the tail gas treatment effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical waste gas treatment, in particular to a tail gas treatment device for a potassium fertilizer production system. Background Technique

[0002] During the production process of potassium fertilizer, some toxic gases will be generated, the most common of which include ammonia, chlorine, hydrogen sulfide and sulfur dioxide, etc. Usually, a scrubbing tower can be used for purification when treating waste gas. A scrubbing tower is a common waste gas treatment device, and its main function is to absorb harmful substances in the waste gas through liquid, so as to achieve the purpose of purifying and removing harmful components in the waste gas;

[0003] Absorbing liquid is usually sprayed inside the scrubbing tower. When the waste gas contacts the liquid, mass transfer and reaction will occur, so that the pollutants in the waste gas are absorbed into the liquid. After being treated by the scrubbing tower, the discharged waste gas will become cleaner, reducing the harm to the environment and human body.

[0004] For a current fertilizer production waste gas treatment device, as described in the patent with publication number CN217016059U, the composition of this product includes: a box body, one side wall of the box body is fixedly connected with an air inlet pipe that is communicated, the top of the box body is fixedly connected with an exhaust pipe, and spray pipes are uniformly arranged on the upper side inside the box body. The utility model overcomes the deficiencies of the prior art. By setting baffles and water dropping holes, the waste gas can flow upward in a zigzag manner between each group of baffles after being discharged into the inside of the box body, thereby increasing the residence time of the waste gas inside the box body. After the treatment solution sprayed by the nozzles falls on the baffles, it can fall through the water dropping holes, thereby spraying and treating the waste gas flowing between adjacent two groups of baffles, thus effectively improving the contact rate between the waste gas and the treatment solution, and further improving the treatment effect of the waste gas.

[0005] Regarding the above related technology, the applicant believes that a fertilizer production waste gas treatment device installs multiple horizontal baffles on the inner wall of the box body to increase the length of the tail gas flow inside, so as to increase the time of the tail gas flow inside the box body. The neutralizing liquid drips from the water dropping holes opened on the baffles in sequence to neutralize with the tail gas. However, since the internal air flow is continuous and has a relatively high velocity, the flowing tail gas will increase a certain resistance to the water dropping holes, reducing the speed of the neutralizing liquid flowing down through the water dropping holes and reducing the contact and neutralizing time between the absorbing liquid and the tail gas, thereby affecting the treatment effect of the tail gas. Content of the Utility Model

[0006] The purpose of the utility model is to provide a tail gas treatment device for a potassium fertilizer production system to solve the problems put forward in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solution: An exhaust gas treatment device for a potassium fertilizer production system, comprising a washing tower, an intake pipe, a partition board, a funnel, a drain pipe, a collection tank, a pump, a liquid suction pipe, an infusion pipe and a spray pipe: The intake pipe is fixed on the outer wall at the bottom of the washing tower; There are four partition boards evenly placed inside the washing tower. The tops of the four partition boards are welded with a top plate, and the top plate is horizontally welded on the inner wall of the washing tower. Each of the four partition boards is provided with an exchange hole; The funnel is placed at the bottom on one side of the partition board; The top of the drain pipe is fixed to the bottom of the funnel; The collection tank is opened at the bottom of the washing tower, and the collection tank corresponds to the outlet of the drain pipe; The pump is placed on the outer wall of the washing tower; One end of the liquid suction pipe is connected to the pump, and the other end extends to the bottom of the collection tank; One end of the infusion pipe is connected to the pump, and the other end extends to the washing tower at the top position of the partition board; There are five spray pipes respectively located at the top of the spaces separated by the partition boards, and the other ends are all connected to the infusion pipe.

[0008] By adopting the above technical solution, four partition boards are vertically fixed inside the washing tower to form multiple flow channels. Under the action of the exchange holes, the exhaust gas entering the washing tower from the intake pipe has an increased flow distance. The absorption liquid in the collection tank is transported to the spray pipes by the pump, the liquid suction pipe and the infusion pipe for spraying. Each spray pipe can spray the absorption liquid on the separated space separately, so that the exhaust gas can be sprayed and neutralized when flowing through different channels, improving the contact reaction time between the exhaust gas and the absorption liquid, and thus improving the treatment effect on the exhaust gas.

[0009] Preferably, a top cover is fixed on the top of the washing tower, and the top of the partition board on the side away from the intake pipe is not sealed and connected to the top cover.

[0010] By adopting the above technical solution, the exhaust gas purified by flowing through the partition board can directly enter the top cover to be collected, and finally discharged from the top of the top cover, so that the partition board forms a rectangular channel to collect and discharge the exhaust gas.

[0011] Preferably, a three-way valve is fixedly connected to a section of the infusion pipe close to the pump, and a liquid exchange pipe is fixedly connected to the connecting nozzle in the horizontal direction of the three-way valve.

[0012] By adopting the above technical solution, the liquid exchange pipe can be opened and closed through the three-way valve, and the direction of the absorption liquid discharged by the pump is discharged from the liquid exchange pipe. At the same time, when the pump rotates in reverse, a new absorption liquid can be inhaled into the collection tank through the liquid exchange pipe. Thus, when the absorption liquid cannot neutralize, the absorption liquid can be quickly replaced by closing the three-way valve in different directions, reducing the influence of the time required to replace the absorption liquid on purifying the exhaust gas.

[0013] Preferably, the bottom of the collection tank is in the shape of an inverted quadrangular pyramid, and a circular liquid suction cover is fixed at the bottom of the liquid suction pipe close to the bottom of the collection tank.

[0014] By adopting the above technical solution, the bottom of the collection tank is formed into an inverted frustum of a pyramid shape, so that the absorption liquid will quickly concentrate at the bottom for easy suction and transportation. At the same time, the absorption hood at the bottom of the liquid suction pipe can increase the absorption area, and when replacing and discharging the waste absorption liquid, the effect of residual liquid absorption can be improved.

[0015] Preferably, funnels are fixedly arranged at the bottoms between adjacent partition plates, and the absorption liquid added to the collection tank submerges half of the length of the liquid discharge pipe.

[0016] By adopting the above technical solution, by welding funnels at the bottoms of the partition plates, the collection tank and the partition plates can be separated to form two spaces. When the absorption liquid is added and submerges the liquid discharge pipe, the tail gas transported by the air inlet pipe is blocked by the absorption liquid, so that the tail gas cannot enter the lower part from the liquid discharge pipe, ensuring that the tail gas can flow and be purified along the channels formed by the partition plates.

[0017] Preferably, spray heads are uniformly connected to the spray pipe, and the position of the exchange hole is below the spray heads.

[0018] By adopting the above technical solution, by arranging the spray pipe and the spray heads at the top of the exchange hole, the tail gas is always under the sprayed absorption liquid, improving the contact effect between the tail gas and the absorption liquid and the efficiency of purifying the tail gas.

[0019] Preferably, the exchange holes opened in the partition plate on one side of the air inlet pipe are located at the top, and the exchange holes are opened at opposite positions in the remaining partition plates in turn.

[0020] By adopting the above technical solution, through the above opening of the positions of the exchange holes, the tail gas first enters from the bottom and rises, flowing up and down on one side, increasing the flow time of the tail gas in the scrubbing tower and the reaction time with the absorption liquid, and improving the effect of tail gas purification.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] (1) By vertically fixing four partition plates inside the scrubbing tower, multiple flow channels can be formed. Under the action of the exchange holes, the flow distance of the tail gas entering the scrubbing tower from the air inlet pipe is increased. The absorption liquid in the collection tank is transported to the spray pipe by the pump, the liquid suction pipe and the liquid delivery pipe for spraying. Each spray pipe can separately spray the absorption liquid on the separated space, so that the tail gas can be sprayed and neutralized when flowing through different channels, increasing the contact reaction time between the tail gas and the absorption liquid, and thus improving the effect of tail gas treatment;

[0023] (2) The liquid exchange pipe can be opened and closed through a three-way valve, and the absorption liquid discharged by the pump can be discharged from the liquid exchange pipe. At the same time, when the pump runs in reverse, a new absorption liquid can be inhaled into the collection tank through the liquid exchange pipe. Therefore, when the absorption liquid cannot be neutralized, the absorption liquid can be quickly replaced by closing the three-way valve in different directions, reducing the impact of the time required to replace the absorption liquid on purifying the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the device of the present utility model;

[0025] Figure 2 It is a sectional view of the structure of the scrubbing tower of the present utility model;

[0026] Figure 3 It is a schematic diagram of the structure of the spray pipe and the partition plate of the present utility model;

[0027] Figure 4 It is a sectional view of the bottom structure of the scrubbing tower of the present utility model.

[0028] In the figure: 1, scrubbing tower; 2, intake pipe; 3, partition plate; 4, exchange hole; 5, funnel; 6, drain pipe; 7, collection tank; 8, pump; 9, liquid suction pipe; 10, liquid delivery pipe; 11, spray pipe; 12, top cover; 13, three-way valve; 14, liquid exchange pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] The following is a further detailed description of the present utility model in conjunction with the attached Figures 1-4 drawings.

[0031] Embodiment 1

[0032] Please refer to Figures 1 to 4 , an embodiment provided by the present utility model: a tail gas treatment device for a potassium fertilizer production system, including a scrubbing tower 1, an intake pipe 2, a partition plate 3, an exchange hole 4, a funnel 5, a drain pipe 6, a collection tank 7, a pump 8, a liquid suction pipe 9 and a liquid delivery pipe 10: The intake pipe 2 is fixed on the outer wall of the bottom of the scrubbing tower 1, and the intake pipe 2 is fixed at the bottom of the scrubbing tower 1 by welding, and is used to transport tail gas into the scrubbing tower 1; There are four partition plates 3 evenly placed inside the scrubbing tower 1, the tops of the four partition plates 3 are welded with a top plate, and the top plate is horizontally welded on the inner wall of the scrubbing tower 1, and the four partition plates 3 are all provided with exchange holes 4.

[0033] The partition plate 3 is fixed on the inner wall of the scrubbing tower 1 by welding, and the partition plates 3 are in a vertical and parallel state, forming separate purification channels inside; the exchange holes 4 are opened on the four partition plates 3, and the exchange holes 4 can connect the channels formed by each partition plate 3, extending the length of the tail gas flow when flowing, and improving the purification effect; the funnel 5 is placed at the bottom of the partition plate 3, and there are multiple funnels 5 welded to the bottom between the partition plates 3 to shield the bottom of the partition plate 3; the top of the drain pipe 6 is fixed to the bottom of the funnel 5, and the top of the drain pipe 6 is welded to the bottom of the funnel 5 for discharging the absorption liquid collected by the funnel 5 downward from the drain pipe 6 for collection; the collection tank 7 is opened at the bottom of the scrubbing tower 1, and the collection tank 7 corresponds to the outlet of the drain pipe 6, and the collection tank 7 is used to store the absorption liquid; the pump 8 is placed on the outer wall of the scrubbing tower 1, and the pump 8 is a corrosion-resistant water pump for two-way transportation, facilitating the discharge or addition of the absorption liquid into the collection tank 7; one end of the liquid suction pipe 9 is connected to the pump 8, and the other end extends to near the bottom of the collection tank 7, and the liquid suction pipe 9 is fixed to the pump 8 by bolts for sucking the absorption liquid; one end of the liquid delivery pipe 10 is connected to the pump 8, and the other end extends to the scrubbing tower 1 at the top position of the partition plate 3

[0034] Embodiment 2

[0035] Please refer to Figures 1 to 4 , an embodiment provided by the present utility model: a tail gas treatment device for a potassium fertilizer production system, including a spray pipe 11. There are five spray pipes 11 located at the top of the space separated by the partition plate 3, and the other ends are all connected to the liquid delivery pipe 10. The absorption liquid in the collection tank 7 is transported to the spray pipe 11 by the pump 8, the liquid suction pipe 9 and the liquid delivery pipe 10 for spraying. Each spray pipe 11 can spray the absorption liquid on the separated space separately, so that the tail gas can be sprayed and neutralized when flowing through different channels, increasing the contact reaction time between the tail gas and the absorption liquid, and further improving the effect of tail gas treatment.

[0036] Please refer to Figures 2 to 4, a top cover 12 is fixed to the top of the scrubbing tower 1, and the top of the partition 3 on the side away from the intake pipe 2 is not sealed and connected to the top cover 12. The purified tail gas flowing through the partition 3 can directly enter the top cover 12 to be collected, and finally discharged from the top of the top cover 12, so that the partition 3 forms a rectangular channel to collect and discharge the discharged tail gas. A three-way valve 13 is fixedly connected to a section of the infusion pipe 10 near the pump 8. The connecting nozzle in the horizontal direction of the three-way valve 13 is fixedly connected to a liquid changing pipe 14. The three-way valve 13 can open and close the liquid changing pipe 14 to discharge the absorption liquid discharged by the pump 8 from the liquid changing pipe 14. At the same time, when the pump 8 rotates in reverse, a new absorption liquid can be inhaled through the liquid changing pipe 14 into the collection tank 7. Thus, when the absorption liquid cannot be neutralized, the absorption liquid can be quickly replaced by closing the three-way valve 13 in different directions, reducing the impact of the time required to replace the absorption liquid on the purification of the tail gas. The bottom of the collection tank 7 is in the shape of an inverted quadrangular pyramid. The bottom of the collection tank 7 is opened in the shape of an inverted quadrangular pyramid, and the absorption liquid will quickly concentrate at the bottom for easy suction and transportation. A circular liquid suction cover is fixed to the bottom of the liquid suction pipe 9 near the bottom of the collection tank 7. The liquid suction cover at the bottom of the liquid suction pipe 9 can increase the absorption area, and when replacing and discharging the waste absorption liquid, the absorption effect of the residual liquid can be improved.

[0037] Please refer to Figure 2 and Figure 4 , funnels 5 are fixedly installed at the bottoms between adjacent partitions 3, and the absorption liquid added to the collection tank 7 submerges half of the length of the drain pipe 6. By welding funnels 5 to the bottoms of the partitions 3, the collection tank 7 and the partitions 3 can be separated to form two spaces. When the absorption liquid is added to submerge the drain pipe 6, the tail gas transported by the intake pipe 2 is blocked by the absorption liquid, so that the tail gas cannot enter the lower part through the drain pipe 6, ensuring that the tail gas can flow and be purified along the channel formed by the partitions 3. Sprayers are evenly connected to the spray pipe 11, and the position of the exchange hole 4 is below the sprayers. By arranging the spray pipe 11 and the sprayers above the exchange hole 4, the tail gas is always under the sprayed absorption liquid, improving the contact effect between the tail gas and the absorption liquid and the efficiency of purifying the tail gas. The exchange hole 4 opened in the partition 3 on one side of the intake pipe 2 is located at the top, and the exchange holes 4 are opened at opposite positions in the remaining partitions 3 in turn. Through the above arrangement of the positions of the exchange holes 4, the tail gas first enters from the bottom and rises, flowing up and down on one side, increasing the flow time of the tail gas in the scrubbing tower 1 and the reaction time with the absorption liquid, and improving the effect of purifying the tail gas.

[0038] Working principle: When in use, tail gas is conveyed into the scrubbing tower 1 through the air inlet pipe 2. The tail gas flows through the exchange holes 4 on the partition plate 3 in sequence. The pump 8, the liquid suction pipe 9 and the liquid delivery pipe 10 are used to convey the absorption liquid in the collection tank 7 into the spray pipe 11 for spraying. Each spray pipe 11 can spray the absorption liquid on the separated space separately, so that the tail gas can be sprayed and neutralized when flowing through different channels. Finally, the purified tail gas is collected and discharged at the top hood 12. At the same time, the absorption liquid after spraying and absorption falls into the bottom funnel 5 and flows into the collection tank 7 through the liquid discharge pipe 6 for reuse until absorption saturation.

[0039] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model.

Claims

1. An exhaust gas treatment device for a potassium fertilizer production system, characterized in that, Including: A scrubbing tower; An intake pipe fixed to the outer wall at the bottom of the scrubbing tower; Partition boards, four of which are evenly placed inside the scrubbing tower. The tops of the four partition boards are welded with a top plate, and the top plate is horizontally welded to the inner wall of the scrubbing tower. Each of the four partition boards is provided with an exchange hole; A funnel placed at the bottom of the partition board; A drain pipe, the top of which is fixed to the bottom of the funnel; A collection tank opened at the bottom of the scrubbing tower, and the collection tank corresponds to the outlet of the drain pipe; A pump placed on the outer wall of the scrubbing tower; A liquid suction pipe, one end of which is connected to the pump and the other end extends to near the bottom of the collection tank; A liquid delivery pipe, one end of which is connected to the pump and the other end extends to the scrubbing tower at the top position of the partition board; Five spray pipes are respectively located at the top of the spaces separated by the partition boards, and the other ends are all connected to the liquid delivery pipe.

2. The tail gas treatment device for a potassium fertilizer production system according to claim 1, characterized in that: A top cover is fixed to the top of the scrubbing tower, and the top of the partition board on the side far from the intake pipe is not sealed and communicated with the top cover.

3. The tail gas treatment device for a potassium fertilizer production system according to claim 1, characterized in that: A three-way valve is fixedly connected to a section of the liquid delivery pipe near the pump, and a liquid changing pipe is fixedly connected to the connecting nozzle in the horizontal direction of the three-way valve.

4. An exhaust gas treatment device for a potassium fertilizer production system according to claim 1, characterized in that: The bottom of the collection tank is in the shape of an inverted quadrangular pyramid, and a circular liquid suction cover is fixed to the bottom of the liquid suction pipe near the bottom of the collection tank.

5. An exhaust gas treatment device for a potassium fertilizer production system according to claim 1, characterized in that: Funnels are fixedly installed at the bottoms between adjacent partition boards, and the absorption liquid added to the collection tank submerges half of the length of the drain pipe.

6. The tail gas treatment device for a potassium fertilizer production system according to claim 1, characterized in that: Spray heads are evenly connected to the spray pipes, and the exchange holes are located below the spray heads.

7. The tail gas treatment device for a potassium fertilizer production system according to claim 1, characterized in that: The exchange holes opened in the partition board on the side of the intake pipe are located at the top, and the exchange holes in the remaining partition boards are opened at opposite positions in turn.

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