Tail gas white pollution removal device for threshing and redrying production

Abstract

The utility model relates to the technical field of tobacco processing tail gas treatment, and discloses a threshing and redrying production tail gas white pollution removal device which comprises a bearing plate, a vertical centrifugal pump is fixedly connected to the right side of the middle of the top end of the bearing plate, and the top end of the vertical centrifugal pump is communicated with a flow guide pipe. The bottom end of the flow guide pipe communicates with a plurality of evenly-distributed atomizing nozzles, and the left side of the vertical centrifugal pump communicates with a backflow pipe. According to the utility model, the spraying liquid is sprayed into the purification tower through the atomization nozzle along the flow guide pipe by virtue of the vertical centrifugal pump, and meanwhile, the right end of the circulating water tank fixed at the bottom end of the purification tower is communicated with the return pipe, so that the spraying liquid can flow back to the vertical centrifugal pump and is sprayed out again; and the tail gas can be conveyed into the fan and discharged through the air outlet pipe through the air guide pipe communicated with the top end of the purification tower, so that the treatment efficiency and the purification effect of the tail gas can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco processing tail gas treatment, in particular to a device for removing white pollution from tail gas produced by leaf threshing and re-roasting. Background Art

[0002] Leaf threshing and redrying is a key step in the tobacco processing process. Its main purpose is to improve the aroma and combustion performance of tobacco leaves by heating and drying. However, in this process, a large amount of tail gas will be produced. The tail gas contains a series of pollutants, including particulate matter, tar, nicotine, organic compounds, etc. These pollutants are usually called "white pollution". At present, the market urgently needs an efficient and low-cost leaf threshing and redrying production tail gas white pollution removal device, which can effectively treat particulate matter and organic pollutants in the tail gas, while reducing secondary pollution, to achieve a win-win situation of environmental protection and economic benefits.

[0003] After searching, the Chinese patent announcement number: CN217646611U discloses a system for eliminating condensable particulate matter and white plume in wet flue gas desulfurization, including: SCR denitrification device, heat exchanger, dust collector, SCR desulfurization device, cyclone separator, wet electrostatic precipitator, chimney, air distribution fan, fan flow control valve, air supply flow control valve. The utility model introduces dilution gas through the air distribution fan to accelerate the formation of CPM and liquid water. The conversion of CPM from gas to liquid is conducive to its removal by the cyclone separator and wet electrostatic precipitator, thereby greatly improving the removal efficiency of CPM; the cyclone separator can recycle the condensed water after the flue gas is diluted and supply it to the desulfurization system or other systems, reducing the amount of water replenishment in the system; the moisture content of the diluted flue gas is reduced, which can significantly eliminate the white plume phenomenon; after dilution, part of the flue gas is introduced into the primary air system of the coal-fired equipment, which can make full use of the waste gas surplus generated in the process of pollutant treatment and reduce the total pollutant emissions.

[0004] During the use of the above-mentioned equipment, the condensed water after flue gas dilution can be recovered through the cyclone separator and supplied to the desulfurization system or other systems, thereby reducing the amount of water to be added to the system; the moisture content of the diluted flue gas is reduced, which can significantly eliminate the white smoke plume phenomenon. However, it is difficult for the device to achieve continuous and stable operation, especially when dealing with high-concentration pollutants. The treatment efficiency is not high, and the removal effect on tiny particles and certain organic compounds is not good. Therefore, a white pollution removal device for exhaust gas from leaf threshing and re-roasting production is proposed to solve the above-mentioned problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a device for removing white pollution from exhaust gas from leaf threshing and re-roasting production, aiming to improve the problem that the device in the prior art is difficult to achieve continuous and stable operation, especially when treating high-concentration pollutants, the treatment efficiency is low, and the removal effect of tiny particles and certain organic compounds is poor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for removing white pollution from exhaust gas produced by leaf beating and re-roasting, comprising a load-bearing plate, a vertical centrifugal pump is fixedly connected to the right side of the middle top of the load-bearing plate, the top of the vertical centrifugal pump is connected to a guide pipe, the bottom end of the guide pipe is connected to a plurality of evenly distributed atomizing nozzles, the left side of the vertical centrifugal pump is connected to a return pipe, the left end of the return pipe is connected to a circulating water tank, the top of the circulating water tank is fixedly connected to a purification tower, the top of the purification tower is connected to an air guide pipe, the other end of the air guide pipe is connected to a fan, the top of the fan is connected to an air outlet pipe, the top of the air outlet pipe is fixedly connected to a wind hood, and the inner wall of the purification tower is provided with a purification component.

[0007] As a further description of the above technical solution:

[0008] The purification component includes two packing support plates, both of which are arranged on the inner wall of the purification tower, the top of the two packing support plates are provided with packing layers, the top of the two packing layers are provided with packing pressure plates, and a swirl plate is fixedly connected to the upper middle end of the inner wall of the purification tower.

[0009] As a further description of the above technical solution:

[0010] A regulating valve is fixedly connected to the outer side of the middle part of the flow guide pipe, and a reflux valve is fixedly connected to the outer side of the middle part of the reflux pipe.

[0011] As a further description of the above technical solution:

[0012] A support seat is fixedly connected to the right side of the middle portion of the top end of the load-bearing plate near the edge, and a limiting groove is provided in the middle portion of the top end of the support seat.

[0013] As a further description of the above technical solution:

[0014] The inner side wall of the limiting groove is slidably connected with a medicine adding barrel, and the left end of the medicine adding barrel is connected with a liquid adding pipe.

[0015] As a further description of the above technical solution:

[0016] The right end of the liquid adding pipe is connected to the right side of the middle part of the vertical centrifugal pump, and a flange is fixed to the middle part of the liquid adding pipe.

[0017] As a further description of the above technical solution:

[0018] The rear end of the middle part of the circulating water tank is connected with an air intake pipe, and the middle part of the air intake pipe is fixedly connected with an air intake valve.

[0019] As a further description of the above technical solution:

[0020] A control panel is fixedly connected to the front end of the top right side of the load-bearing plate, a mounting groove is opened on the left side of the top end of the load-bearing plate, threaded holes are opened at the four corners of the bottom end of the fan, and the inner walls of multiple threaded holes are threadedly connected with threaded nails, and the bottom end of the fan is slidably connected to the inner wall of the mounting groove.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the spray liquid is sprayed into the purification tower along the guide pipe through the atomizing nozzle by a vertical centrifugal pump, and at the same time, the right end of the circulating water tank fixed at the bottom of the purification tower is connected with a reflux pipe, so that the spray liquid can flow back to the vertical centrifugal pump and be sprayed out again, so that the spray liquid can be recycled while completing the exhaust gas purification treatment, and the exhaust gas can be transported into the fan and discharged through the outlet pipe through the air guide pipe connected to the top of the purification tower, thereby effectively improving the treatment efficiency and purification effect of the exhaust gas.

[0023] 2. In the utility model, a packing support plate is installed inside the purification tower, and the packing layer is placed on the packing support plate in a random pile manner. A packing pressure plate is installed above the packing layer to prevent it from being blown by the rising airflow. The spray liquid is sprayed from the guide pipe through the atomizing nozzle onto the packing layer and flows down along the surface of the packing. The tail gas is sent into the purification tower from the bottom and continuously passes through the gaps in the packing layer in countercurrent with the spray liquid. On the surface of the packing, the gas-liquid two phases are in close contact for mass transfer, thereby completing the purification of the tail gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front view of the white pollution removal device for tail gas from leaf threshing and redrying production proposed by the utility model;

[0025] Figure 2 A schematic diagram of a vertical centrifugal pump of a white pollution removal device for tail gas from leaf threshing and redrying production proposed by the utility model;

[0026] Figure 3 It is a cross-sectional view of the purification tower of the device for removing white pollution from tail gas in leaf threshing and redrying production proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the fan of the device for removing white pollution from tail gas in leaf threshing and re-roasting production proposed by the utility model.

[0028] Legend:

[0029] 1. Load-bearing plate; 2. Vertical centrifugal pump; 3. Guide pipe; 4. Atomizing nozzle; 5. Return pipe; 6. Circulating water tank; 7. Purification tower; 8. Air guide pipe; 9. Purification component; 901. Packing support plate; 902. Packing layer; 903. Packing pressure plate; 904. Swirl plate; 10. Fan; 11. Air outlet pipe; 12. Air hood; 13. Regulating valve; 14. Return valve; 15. Support seat; 16. Limiting groove; 17. Dosing barrel; 18. Dosing pipe; 19. Flange; 20. Inlet pipe; 21. Inlet valve; 22. Control panel; 23. Installation groove; 24. Threaded hole; 25. Threaded nail. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1 , Figure 2 and Figure 4 The utility model provides an embodiment: a device for removing white pollution from tail gas produced by leaf threshing and redrying, comprising a bearing plate 1, a vertical centrifugal pump 2 is fixedly connected to the right side of the middle of the top of the bearing plate 1, a guide pipe 3 is connected to the top of the vertical centrifugal pump 2, a plurality of evenly distributed atomizing nozzles 4 are connected to the bottom of the guide pipe 3, a return pipe 5 is connected to the left side of the vertical centrifugal pump 2, a circulating water tank 6 is connected to the left end of the return pipe 5, a purification tower 7 is fixedly connected to the top of the circulating water tank 6, an air guide pipe 8 is connected to the top of the purification tower 7, a fan 10 is connected to the other end of the air guide pipe 8, and the fan 10 is connected to the bottom of the air guide pipe 8. The top is connected with an air outlet pipe 11, the top of the air outlet pipe 11 is fixedly connected with a wind cap 12, and the inner wall of the purification tower 7 is provided with a purification component 9; the middle rear end of the circulating water tank 6 is connected with an air inlet pipe 20, and the middle of the air inlet pipe 20 is fixedly connected with an air inlet valve 21; the front end of the top right side of the load-bearing plate 1 is fixedly connected with a control panel 22, and the left side of the top of the load-bearing plate 1 is provided with a mounting groove 23, and the four corners of the bottom end of the fan 10 are provided with threaded holes 24, and the inner walls of the multiple threaded holes 24 are threadedly connected with threaded nails 25, and the bottom end of the fan 10 is slidably connected to the inner wall of the mounting groove 23;

[0032] Specifically: A vertical centrifugal pump 2 is fixedly installed on the right side of the middle of the top of the load-bearing plate 1. The top of the vertical centrifugal pump 2 is connected through a guide pipe 3, so that the spray liquid can flow smoothly in the guide pipe 3. The bottom of the guide pipe 3 is respectively connected with a plurality of evenly distributed atomizing nozzles 4. These nozzles 4 can effectively atomize the spray liquid for better spraying. The left side of the vertical centrifugal pump 2 is connected through a return pipe 5, so that the spray liquid can be effectively refluxed in the circulation. The left end of the flow tube 5 is connected to a circulating water tank 6. The function of the circulating water tank 6 is to store the spray liquid flowing down after spraying. The top of the circulating water tank 6 is fixedly connected to a purification tower 7. The main function of the purification tower 7 is to purify the exhaust gas and remove impurities and pollutants therein. The top of the purification tower 7 is connected to the fan 10 through the air guide pipe 8. The top of the fan 10 is connected to the air outlet pipe 11. The top of the air outlet pipe 11 is fixedly connected to a wind hood 12. The wind hood 12 plays a protective role to prevent foreign matter from entering the air outlet pipe 11.

[0033] Reference Figure 3 The purification component 9 includes two packing support plates 901, both of which are arranged on the inner side wall of the purification tower 7, and the tops of the two packing support plates 901 are provided with packing layers 902, and the tops of the two packing layers 902 are provided with packing pressure plates 903, and the upper middle end of the inner side wall of the purification tower 7 is fixedly connected with a swirl plate 904;

[0034] Specifically: two packing support plates 901 are installed on the inner wall of the purification tower 7 to ensure the effectiveness of its supporting function. The top part of each packing support plate 901 is provided with a fine packing layer 902. The main function of this packing layer 902 is to increase the contact area and improve the purification efficiency. Above the packing layer 902, a packing pressure plate 903 is provided. Its purpose is to maintain the shape and stability of the packing layer 902 so that it can play the best effect in the purification process. In addition, at the upper middle end of the inner wall of the purification tower 7, there is a swirl plate 904 installed by a fixed connection. The design of this swirl plate 904 is unique. It can enhance the mixing of the gas-liquid two phases by generating a swirl flow, thereby further improving the purification efficiency. The design of the entire purification component 9 embodies the principles of high efficiency, science and practicality, and can achieve deep purification of the exhaust gas.

[0035] Reference Figure 1 and Figure 2 A support seat 15 is fixedly connected to the right side of the middle of the top of the load-bearing plate 1 near the edge, and a limiting groove 16 is provided in the middle of the top of the support seat 15; a dosing barrel 17 is slidably connected to the inner side wall of the limiting groove 16, and a liquid adding pipe 18 is connected to the left end of the dosing barrel 17; the right end of the liquid adding pipe 18 is connected to the right side of the middle part of the vertical centrifugal pump 2, and a flange 19 is fixed to the middle of the liquid adding pipe 18.

[0036] Specifically: a support seat 15 is installed on the right side of the middle part of the top of the load-bearing plate 1 near the edge. The support seat 15 is provided with a limit groove 16 in the middle part of its top, so that the dosing barrel 17 can move flexibly in the limit groove 16. The left end of the dosing barrel 17 is connected to the vertical centrifugal pump 2 through a liquid adding pipe 18, so that the spray liquid can be conveniently delivered to the vertical centrifugal pump 2 through the liquid adding pipe 18. In order to ensure the stability of the liquid adding pipe 18, a flange 19 is fixed in the middle of the liquid adding pipe 18 to prevent the liquid adding pipe 18 from shifting during the process of conveying the liquid medicine.

[0037] Working principle: When the device is needed to treat exhaust gas, the exhaust gas passes through the intake pipe 20, and the intake pipe 20 enters the circulating water tank 6. An intake valve 21 is installed at the center of the intake pipe 20. The function of the intake valve 21 is to adjust and control the speed of the exhaust gas entering the intake pipe 20. At the same time, the atomizing nozzles 4 evenly distributed on the guide pipe 3 fixed at the top of the vertical centrifugal pump 2 can effectively atomize the spray liquid so that it can be better sprayed into the purification tower 7. At the same time, the right end of the circulating water tank 6 fixed at the bottom of the purification tower 7 is connected to a reflux pipe 5, which can make the spray liquid return to the vertical centrifugal pump 2 and be sprayed out again, so as to complete the exhaust gas purification treatment and recycle the spray liquid. The purification tower 7 is fixedly connected to the top of the circulating water tank 6, and two packing support plates 901 are installed on the inner wall of the purification tower 7. The top part of each packing support plate 901 is provided with a layer of fine The packing layer 902 mainly increases the contact area and improves the purification efficiency. A packing pressure plate 903 is arranged above the packing layer 902. Its purpose is to maintain the shape and stability of the packing layer 902 so that it can play the best effect in the purification process. In addition, a swirl plate 904 is installed at the upper middle end of the inner wall of the purification tower 7. The swirl plate 904 can enhance the mixing of the gas-liquid two phases by generating a swirl flow, thereby further improving the purification efficiency. The design of the entire purification component 9 embodies the principles of high efficiency, science and practicality, and can achieve deep purification of the exhaust gas. Then, the purification tower 7 is connected to the fan 10 through the air guide pipe 8. The top of the fan 10 is connected to the air outlet pipe 11, and the top of the air outlet pipe 11 is fixedly connected to the wind cap 12. The wind cap 12 plays a protective role to prevent foreign matter from entering the air outlet pipe 11, thereby effectively improving the treatment efficiency and purification effect of the exhaust gas.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. 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 removing white pollution from tail gas from leaf threshing and re-roasting production, comprising a bearing plate (1), characterized in that: A vertical centrifugal pump (2) is fixedly connected to the right side of the middle of the top of the load-bearing plate (1); the top of the vertical centrifugal pump (2) is connected to a guide pipe (3); the bottom of the guide pipe (3) is connected to a plurality of evenly distributed atomizing nozzles (4); the left side of the vertical centrifugal pump (2) is connected to a return pipe (5); the left end of the return pipe (5) is connected to a circulating water tank (6); the top of the circulating water tank (6) is fixedly connected to a purification tower (7); the top of the purification tower (7) is connected to an air guide pipe (8); the other end of the air guide pipe (8) is connected to a fan (10); the top of the fan (10) is connected to an air outlet pipe (11); the top of the air outlet pipe (11) is fixedly connected to a wind cap (12); and a purification component (9) is provided on the inner side wall of the purification tower (7).

2. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 1 is characterized by: The purification component (9) comprises two packing support plates (901), the two packing support plates (901) are both arranged on the inner side wall of the purification tower (7), the top ends of the two packing support plates (901) are both provided with packing layers (902), the top ends of the two packing layers (902) are both provided with packing pressure plates (903), and a swirl plate (904) is fixedly connected to the upper middle end of the inner side wall of the purification tower (7).

3. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 1 is characterized by: A regulating valve (13) is fixedly connected to the outer side of the middle part of the flow guide pipe (3), and a reflux valve (14) is fixedly connected to the outer side of the middle part of the reflux pipe (5).

4. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 1 is characterized by: A support seat (15) is fixedly connected to the right side of the middle of the top end of the load-bearing plate (1) near the edge, and a limiting groove (16) is provided in the middle of the top end of the support seat (15).

5. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 4 is characterized by: The inner side wall of the limiting groove (16) is slidably connected to a medicine adding barrel (17), and the left end of the medicine adding barrel (17) is connected to a liquid adding pipe (18).

6. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 5 is characterized by: The right end of the liquid adding pipe (18) is connected to the right side of the middle part of the vertical centrifugal pump (2), and a flange (19) is fixed to the middle part of the liquid adding pipe (18).

7. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 1 is characterized by: The rear end of the middle part of the circulating water tank (6) is connected to an air intake pipe (20), and the middle part of the air intake pipe (20) is fixedly connected to an air intake valve (21).

8. The device for removing white pollution from tail gas from leaf threshing and redrying production according to claim 1 is characterized by: A control panel (22) is fixedly connected to the front end of the top right side of the load-bearing plate (1), a mounting groove (23) is provided on the left side of the top of the load-bearing plate (1), threaded holes (24) are provided at four corners of the bottom end of the fan (10), the inner side walls of the plurality of threaded holes (24) are threadedly connected with threaded nails (25), and the bottom end of the fan (10) is slidably connected to the inner side wall of the mounting groove (23).

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