A tail gas absorption treatment device based on bismuth potassium citrate mother liquor

Abstract

The utility model relates to tail gas absorption treatment device technical field especially based on bismuth potassium citrate mother liquor's tail gas absorption treatment device, including tower body, the lower extreme of tower body is provided with the liquid storage seat, the outer wall one side lower extreme of tower body is fixed with the air inlet interface through the penetration, the inner wall on tower body is fixed with the shunt seat through the support, the shunt seat is annular structure, the inside of shunt seat is provided with the inner chamber, the lower extreme distribution of shunt seat is fixed with a plurality of atomizing nozzles through the penetration, this scheme through ammonia waste gas from the absorption tower lower extreme enters, and the mother liquor of tower top spray down carries out sufficient countercurrent contact, and the ammonia gas in waste gas and the acid component in mother liquor occur neutralization reaction, generate soluble ammonium salt, thereby completed ammonia gas's purification and acid mother liquor's consumption simultaneously, this method fundamentally changed the cost high, the problem of low efficiency that respectively treats waste gas and waste liquid in traditional mode faces.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas absorption and treatment devices, and in particular to an exhaust gas absorption and treatment device based on bismuth potassium citrate mother liquor. Background Technology

[0002] The generation of ammonia-containing process exhaust gases is very common in the production processes of chemicals, pharmaceuticals, fertilizers, and fine chemicals. If these exhaust gases are emitted directly without proper treatment, they will not only cause foul odor pollution and deteriorate the air quality of the surrounding environment, but may also participate in the formation of secondary particulate matter in the atmosphere, posing a threat to the ecological environment and human health. Therefore, effective purification of ammonia-containing exhaust gases is a crucial aspect of industrial waste gas treatment.

[0003] Currently, the main technologies for treating ammonia-containing waste gas include water absorption, acid absorption, adsorption, biological methods, and incineration. Among these, water absorption is widely used due to its simple operation and low cost, but its absorption efficiency for ammonia is limited, especially when the ammonia partial pressure is low. The purified exhaust gas is difficult to consistently meet stringent emission standards, and the resulting low-concentration ammonia water has little value, posing challenges for subsequent treatment and disposal.

[0004] On the other hand, in the pharmaceutical and chemical industry, especially in the production of bismuth preparations such as bismuth potassium citrate, a large amount of distinctive acidic mother liquor is generated. This mother liquor usually contains unreacted organic acid components such as citric acid, has a low pH value, a high chemical oxygen demand, and a certain amount of salt. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a tail gas absorption and treatment device based on bismuth potassium citrate mother liquor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a tail gas absorption and treatment device based on bismuth potassium citrate mother liquor, comprising a tower body, a liquid storage seat provided at the lower end of the tower body, and an air inlet fixed through the lower end of one side of the outer wall of the tower body. A flow divider is fixed to the inner wall of the tower body by a bracket. The flow divider has an annular structure and an inner cavity. Several atomizing nozzles are distributed and penetrated at the lower end of the flow divider, and any one of the atomizing nozzles is connected to the inner cavity of the flow divider. A pump body is fixed to the outer wall of the tower body by a bracket. The outlet flange of the pump body is connected to a delivery pipe. The surface of the delivery pipe is fixed to the outer wall of the tower body. The end of the delivery pipe away from the pump body is fixed to the diverter seat and is connected to the inner cavity. The inlet flange of the pump body is connected to a suction pipe. The end of the suction pipe away from the pump body is fixed to the inside of the liquid storage seat.

[0007] Preferably, a waste discharge port is fixedly installed through one side of the lower end of the liquid storage seat, and a valve is provided on the waste discharge port, with the valve core of the valve being embedded inside the waste discharge port.

[0008] Preferably, a top cover is fixedly installed at the upper end of the tower body, and an exhaust port is fixedly installed through the center of the top cover.

[0009] Preferably, a number of corrugated plates are installed in the middle of the inner wall of the tower body, and a channel for slowing the gas rise is formed between any two adjacent corrugated plates. A mist eliminator is also fixedly installed at the upper end of the inner wall of the tower body.

[0010] Preferably, a level gauge is installed on the upper end of the inner wall of the liquid storage seat, and a pH monitoring probe is installed on the bottom end of the inner wall of the liquid storage seat.

[0011] Preferably, a liquid addition pipe for adding reagents to adjust pH concentration and for adding mother liquor is fixed through one side of the tower body. The liquid addition pipe has a single-opening structure, and a pH adjustment liquid interface and a mother liquor interface are respectively embedded and fixed on the liquid addition pipe.

[0012] Preferably, the pH adjustment liquid interface is provided with a second valve, the valve core of the second valve being embedded inside the pH adjustment liquid interface.

[0013] Preferably, the mother liquor interface is provided with a valve three, and the valve core of the valve three is embedded inside the mother liquor interface.

[0014] The design scheme proposed in this utility model has the following beneficial effects in application: 1. This solution involves ammonia waste gas entering from the bottom of the absorption tower and coming into full countercurrent contact with the mother liquor sprayed down from the top of the tower. The ammonia in the waste gas and the acidic components in the mother liquor undergo a neutralization reaction to generate soluble ammonium salts, thereby simultaneously purifying the ammonia and consuming the acidic mother liquor. This method fundamentally changes the problems of high cost and low efficiency faced by traditional methods that treat waste gas and waste liquid separately. 2. It is also equipped with an automatic pH monitoring probe and a level gauge, which can monitor the acidity and level of the circulating absorption liquid in real time. When the pH value is detected to be rising, indicating that the acidity of the absorption liquid is weakening, the control system can automatically or prompt the operator to open the mother liquor replenishment port and the pH adjustment liquid addition port to replenish fresh mother liquor or regulator in time to restore the activity of the absorption liquid. At the same time, the system can also automatically discharge the waste liquid that is saturated by the reaction according to the settings. Attached Figure Description

[0015] Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a schematic diagram of the rear of the overall structure of this utility model; Figure 3 This is a schematic diagram of the internal front structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the liquid filling interface of this utility model.

[0016] In the diagram: 1. Tower body; 11. Liquid storage base; 12. Air inlet; 13. Diverter; 14. Atomizing nozzle; 15. Delivery pipe; 16. Pump body; 17. Liquid extraction pipe; 101. Waste discharge port; 102. Valve 1; 2. Top cover; 21. Exhaust port; 22. Corrugated plate; 23. Mist eliminator; 3. Liquid level gauge; 31. pH monitoring probe; 32. Liquid addition pipe; 33. pH adjustment liquid port; 34. Mother liquor port; 35. Valve 2; 36. Valve 3. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1 Reference Figures 1-4 A tail gas absorption and treatment device based on bismuth potassium citrate mother liquor includes a tower body 1, a liquid storage seat 11 is provided at the lower end of the tower body 1, and an air inlet 12 is fixed through the lower end of one side of the outer wall of the tower body 1. The liquid storage seat 11 can store the mother liquor for spraying, and the air inlet 12 can be used to transport the ammonia gas to be treated. A diversion seat 13 is fixed to the inner wall of the tower body 1 by a bracket. The diversion seat 13 has an annular structure and an inner cavity. Several atomizing nozzles 14 are distributed and installed through the lower end of the diversion seat 13. Any one of the atomizing nozzles 14 is connected to the inner cavity of the diversion seat 13. Mother liquor can be introduced into the inside of the diversion seat 13 and sprayed downwards through the atomizing nozzles 14 to fully cover the ammonia gas, which can ensure the contact effect with the ammonia gas and thus ensure the ammonia gas treatment capacity. A pump body 16 is fixed to the outer wall of the tower body 1 by a bracket. The outlet flange of the pump body 16 is connected to a delivery pipe 15. The surface of the delivery pipe 15 is fixed to the outer wall of the tower body 1. The end of the delivery pipe 15 away from the pump body 16 is fixed to the distribution seat 13 and is connected to the inner cavity. The inlet flange of the pump body 16 is connected to a suction pipe 17. The end of the suction pipe 17 away from the pump body 16 is fixed to the inside of the storage seat 11. The pump body 16 plays the role of circulating mother liquor. The suction pipe 17 can extract the mother liquor from the storage seat 11 for recycling. The delivery pipe 15 can ensure that the mother liquor is stably delivered to the inside of the distribution seat 13.

[0019] Among them, a waste discharge port 101 is fixed through the lower end of one side of the liquid storage seat 11. A valve 102 is provided on the waste discharge port 101. The valve core of the valve 102 is embedded inside the waste discharge port 101. When the mother liquid circulates for a certain period of time or the liquid storage seat 11 exceeds the standard, the valve 102 can be opened to discharge the waste liquid appropriately or completely through the waste discharge port 101.

[0020] The top cover 2 is fixedly installed at the upper end of the tower body 1. An exhaust port 21 is fixedly installed through the center of the top cover 2. The exhaust port 21 can be used to discharge the ammonia gas from the inside of the tower body 1 after the ammonia gas is purified.

[0021] The tower body 1 has several corrugated plates 22 installed in the middle of its inner wall. A channel for slowing the gas rise is formed between any two adjacent corrugated plates 22. A mist eliminator 23 is also fixedly installed at the upper end of the inner wall of the tower body 1. The corrugated plates 22 can increase the path of ammonia gas rise, thereby achieving the effect of slowing down the gas rise. The mist eliminator 23 can adsorb liquid particles in the purified gas after the mother liquor reacts with ammonia gas.

[0022] The upper inner wall of the liquid storage base 11 is equipped with a level gauge 3, and the bottom inner wall of the liquid storage base 11 is equipped with a pH monitoring probe 31. The level gauge 3 can monitor the liquid level of the mother liquor inside the liquid storage base 11, and the pH monitoring probe 31 can monitor the acidity and alkalinity of the mother liquor. Both the level gauge 3 and the pH monitoring probe 31 are connected to an external central control terminal, so that the staff can receive monitoring information in real time and operate according to the current situation.

[0023] One side of the tower body 1 is fixed with a liquid addition pipe 32 for adding reagents to adjust pH concentration and for adding mother liquor. The liquid addition pipe 32 has a single opening structure. A pH adjustment liquid interface 33 and a mother liquor interface 34 are respectively embedded and fixed on the liquid addition pipe 32. The pH adjustment liquid interface 33 can add pH adjustment liquid into the liquid addition pipe 32, and the mother liquor interface 34 can replenish mother liquor into the liquid addition pipe 32.

[0024] The pH adjustment liquid interface 33 is equipped with a second valve 35. The valve core of the second valve 35 is embedded inside the pH adjustment liquid interface 33. The second valve 35 can control the opening and closing of the pH adjustment liquid interface 33.

[0025] Among them, the mother liquor interface 34 is equipped with a valve 36, the valve core of which is embedded inside the mother liquor interface 34, and the valve 36 can control the opening and closing of the mother liquor interface 34.

[0026] In practice This scheme utilizes the mother liquor stored in the liquid storage seat 11 at the lower end of the tower body. The mother liquor is extracted by the pump body 16 through the extraction pipe 17 and pumped via the delivery pipe 15 to the distribution seat 13 at the upper part of the tower body 1. The distribution seat 13 has an annular structure with an inner cavity. The mother liquor received there is uniformly atomized into fine droplets through multiple atomizing nozzles 14 distributed at its lower end and sprayed downwards. Simultaneously, the ammonia-containing industrial tail gas to be treated enters the tower through the air inlet 12 at the lower end of the tower body 1. The gas rises naturally within the tower, forming a counter-current flow with the mother liquor droplets sprayed downwards. This counter-current contact method greatly increases the contact area and contact time between the gas and liquid phases. During the contact process, the mother liquor... The acidic components, such as citric acid, contained in the liquid react rapidly with ammonia in the tail gas to form soluble ammonium citrate, thereby efficiently transferring and fixing ammonia molecules in the gas phase to the liquid phase, thus purifying the ammonia. The gas after preliminary purification continues to rise, while the absorbent liquid that has participated in the reaction falls into the storage base 11 at the bottom of the tower, waiting to be pumped out again by the pump body 16 for recycling, forming a continuous absorption cycle. The purified gas is finally discharged through the exhaust port 21 on the top cover 2. The level gauge 3 and the pH monitoring probe 31 monitor the liquid level and pH in the storage base 11 in real time, respectively, providing data support for the stable operation of the system. During continuous absorption cycles, the mother liquor continuously consumes its acidic components, causing its pH value to gradually increase and the absorption efficiency to decrease. A pH monitoring probe 31, installed at the bottom of the reservoir 11, continuously monitors the acidity and alkalinity of the circulating mother liquor and transmits the signal to the external central control system. When the pH value exceeds the preset optimal operating range, the central control system issues a command to automatically open valve 36 on the mother liquor interface 34, replenishing the reservoir 11 with fresh, highly acidic bismuth potassium citrate mother liquor through the liquid addition pipe 32 to restore the acidity and reactivity of the absorbent. In some cases, if simply adding mother liquor is insufficient to adjust the pH value to the ideal range, the system can also add additional pH adjusting liquid to the system by opening valve 35 on pH adjusting liquid interface 33 for fine adjustment. Conversely, when the absorption reaction proceeds to a certain extent and the concentration of soluble ammonium salts in the circulating liquid reaches saturation or too many impurities accumulate, even adjusting the pH value may not guarantee efficient absorption. In this case, it is necessary to open valve 102 on waste discharge interface 101 to discharge part or all of the saturated waste liquid from the system and send it to subsequent wastewater treatment facilities. After the ammonia-containing tail gas enters the tower body 1 through the inlet 12, it first undergoes a major neutralization reaction with the mother liquor droplets sprayed down during its ascent. In order to further prolong the gas-liquid contact time and make the airflow distribution more uniform, several corrugated plates 22 are installed in the middle of the inner wall of the tower body 1. These corrugated plates 22 are arranged in an alternating manner, so that the rising gas cannot rise in a straight line, but must move around along the tortuous channel formed between the corrugated plates 22. This design forces the gas path to be longer and the flow rate to be slower, thereby providing ammonia molecules with more opportunities for contact and reaction with the mother liquor droplets. After passing through the corrugated plate 22 area, the gas continues to rise to the upper part of the tower body. Due to the spraying effect, the purified gas may carry a small amount of micron-sized mist droplets. In order to remove these droplets, prevent liquid loss and possible impact on downstream equipment, a mist eliminator 23 is installed at the upper end of the inner wall of the tower body 1, before the exhaust port 21.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tail gas absorption and treatment device based on bismuth potassium citrate mother liquor, comprising a tower body (1), characterized in that: The lower end of the tower body (1) is provided with a liquid storage seat (11), and an air inlet (12) is fixed through the lower end of one side of the outer wall of the tower body (1). A flow divider seat (13) is fixed on the inner wall of the tower body (1) by a bracket. The flow divider seat (13) has an annular structure and an inner cavity. Several atomizing nozzles (14) are distributed and penetrated at the lower end of the flow divider seat (13). Any one of the atomizing nozzles (14) is connected to the inner cavity of the flow divider seat (13). A pump body (16) is fixed to the outer wall of the tower body (1) by a bracket. The outlet flange of the pump body (16) is connected to a delivery pipe (15). The surface of the delivery pipe (15) is fixed to the outer wall of the tower body (1). The end of the delivery pipe (15) away from the pump body (16) is fixed to the diverter seat (13) and the delivery pipe (15) is connected to the inner cavity. The inlet flange of the pump body (16) is connected to a suction pipe (17). The end of the suction pipe (17) away from the pump body (16) is fixed to the inside of the liquid storage seat (11).

2. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 1, characterized in that: The lower end of one side of the liquid storage seat (11) is fixed with a waste discharge port (101), and a valve (102) is provided on the waste discharge port (101). The valve core of the valve (102) is embedded inside the waste discharge port (101).

3. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 2, characterized in that: The top cover (2) is fixedly installed on the upper end of the tower body (1), and an exhaust port (21) is fixedly installed through the center of the top cover (2).

4. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 3, characterized in that: Several corrugated plates (22) are installed in the middle of the inner wall of the tower body (1). A channel for slowing up the gas rise is formed between any two adjacent corrugated plates (22). A mist eliminator (23) is also fixedly installed at the upper end of the inner wall of the tower body (1).

5. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 4, characterized in that: A level gauge (3) is installed on the upper end of the inner wall of the liquid storage seat (11), and a pH monitoring probe (31) is installed on the bottom end of the inner wall of the liquid storage seat (11).

6. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 5, characterized in that: One side of the tower body (1) is fixed with a liquid addition pipe (32) for adding reagents to adjust pH concentration and for adding mother liquor. The liquid addition pipe (32) has a single opening structure, and a pH adjustment liquid interface (33) and a mother liquor interface (34) are respectively embedded and fixed on the liquid addition pipe (32).

7. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 6, characterized in that: The pH adjustment liquid interface (33) is provided with a valve two (35), and the valve core of the valve two (35) is embedded inside the pH adjustment liquid interface (33).

8. The tail gas absorption and treatment device based on bismuth potassium citrate mother liquor according to claim 7, characterized in that: The mother liquor interface (34) is provided with a valve three (36), and the valve core of the valve three (36) is embedded inside the mother liquor interface (34).

Images