Environment-friendly efficient waste gas washing tower

Abstract

The utility model relates to the technical field of washing towers, in particular to an environment-friendly efficient waste gas washing tower which comprises a water tower and a gas tower, purification liquid is filled in the water tower, a gas inlet pipe is arranged on the side wall of the gas tower and communicated with the inside of the gas tower, and a gas filtering layer is arranged at the top of the gas tower and located above the gas inlet pipe. A recovery layer is arranged at the top of the gas tower and located above the gas filtering layer, the recovery layer is communicated with the gas inlet pipe and comprises a mounting ring mounted on the top surface of the gas tower, a blocking layer is arranged on the surface, away from the gas tower, of the mounting ring, a pipeline is arranged in the mounting ring, and the gas filtering layer, the blocking layer and the inner ring wall of the mounting ring jointly define a recovery cavity; according to the waste gas purification device disclosed by the utility model, secondary recovery and purification are carried out on waste gas which is subjected to spraying purification, toxic and harmful gases and solid particles are further reduced, and the purification sufficiency is ensured.

Description

Technical Field

[0001] This utility model relates to the field of scrubbing tower technology, and in particular to an environmentally friendly and efficient waste gas scrubbing tower. Background Technology

[0002] Waste gases generated during chemical production processes need to be purified and recovered or discharged only after meeting emission standards. For example, the flue gas produced after combustion in incinerators contains various harmful substances, such as sulfur dioxide, nitrogen oxides, particulate matter (e.g., fly ash), heavy metals (e.g., lead, mercury), and organic pollutants (e.g., dioxins). If these are discharged directly into the atmosphere without effective treatment, they will pose a serious threat to the environment and human health. Therefore, gas scrubbing towers are needed to preliminarily wash acidic or alkaline gases before discharge to ensure environmental safety. For example, Chinese patent document CN201520568407.4 discloses an environmentally friendly and efficient waste gas scrubbing tower, including a waste gas inlet pipe, an open flame furnace, and a tail gas treatment device. The waste gas inlet pipe is connected to the open flame furnace. An oxygen supply device is installed on the outer wall of the right side of the furnace. The open flame furnace is connected to the air inlet of the scrubbing tower through a gas supply pipe. A first exhaust fan is installed on the gas supply pipe. Two V-shaped gas buffer filter plates are installed in the middle section of the interior of the scrubbing tower. The two V-shaped gas buffer filter plates are arranged opposite each other. A spray pipe is horizontally installed on the upper side of the V-shaped gas buffer filter plates. The above patent fully combusts the exhaust gas before scrubbing, which ensures the scrubbing effect and improves the scrubbing efficiency. The washing liquid is circulated and further improves the exhaust gas treatment effect, saves washing liquid, and reduces the operating cost. However, because the washing liquid is circulated, small particles in the wastewater are prone to clogging the nozzles during the circulation process, which leads to uneven spraying and insufficient scrubbing of some flue gas, affecting the purification effect.

[0003] Therefore, it is necessary for those skilled in the art to provide an environmentally friendly and efficient waste gas scrubbing tower that can recycle and purify the flue gas after spraying and purification, improve the purification effect through repeated washing, and ensure that the waste gas emissions meet the standards. Utility Model Content

[0004] The purpose of this utility model is to provide an environmentally friendly and efficient exhaust gas scrubbing tower to solve the technical problem in the prior art where small particles in the wastewater easily clog the nozzles during the circulation of the scrubbing liquid, resulting in uneven spraying, insufficient scrubbing of some flue gas, and affecting the purification effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an environmentally friendly and efficient waste gas scrubbing tower, including a water tower and a gas tower. The water tower is filled with a purification liquid. An air inlet pipe is provided on the side wall of the gas tower and connects to the interior of the gas tower. An air filter layer is provided at the top of the gas tower and is located above the air inlet pipe. A recovery layer is provided at the top of the gas tower above the air filter layer and is connected to the air inlet pipe. The recovery layer includes an installation ring installed on the top surface of the gas tower. A blocking layer is provided on the side of the installation ring away from the gas tower. A pipe is provided inside the installation ring. The air filter layer, the blocking layer and the inner ring wall of the installation ring together form a recovery cavity. One end of the pipe is located in the recovery cavity and the other end of the pipe is connected to the air inlet pipe.

[0006] Furthermore, an air intake nozzle is provided on the wall of the pipeline located inside the recovery cavity. The air intake nozzle is funnel-shaped and is connected to the pipeline and the recovery cavity. The air intake nozzle is directly facing the upper surface of the air filter layer.

[0007] Furthermore, the end of the pipe away from the mounting ring is provided with an exhaust shell, which is sleeved on the air inlet pipe. An air inlet channel is provided in the middle of the exhaust shell, which penetrates the wall of the exhaust shell and is arranged coaxially with the air inlet pipe. The air inlet channel is connected to the exhaust pipe of the incinerator.

[0008] Furthermore, an installation cavity is formed inside the exhaust shell around the intake pipe. The pipe passes through the shell of the exhaust shell and extends into the installation cavity. A through hole is provided on the wall of the intake channel. An exhaust fan is also provided in the installation cavity. The air inlet of the exhaust fan is connected to the pipe, and the air outlet of the exhaust fan is connected to the through hole.

[0009] Furthermore, the barrier layer is made of glass fiber and has pores.

[0010] Furthermore, a top cover is provided above the recycling layer, and an exhaust port is provided at the top of the top cover. The exhaust port penetrates the top cover wall and connects to the recycling cavity.

[0011] Furthermore, a filtration cavity is formed inside the water tower, and a drain outlet is provided on the top surface of the water tower. The drain outlet penetrates the water tower wall and connects to the filtration cavity on the water tower. A purification cavity is formed inside the gas tower, and the lower opening of the gas tower abuts against the upper top surface of the water tower. The purification cavity and the filtration cavity are interconnected.

[0012] Furthermore, a nozzle is provided on the surface of the air filter layer facing the purification cavity, and the nozzle is connected to the purification liquid inside the water tower.

[0013] Furthermore, a slag discharge pipe is provided on the bottom wall of the water tower. One end of the slag discharge pipe penetrates the bottom wall of the water tower and extends into the interior of the filter cavity. The other end of the slag discharge pipe extends away from the bottom wall of the water tower. A one-way valve is provided on the end of the slag discharge pipe away from the bottom wall of the water tower.

[0014] The beneficial effects of this utility model are as follows: This utility model performs secondary recycling and purification on the waste gas after spray purification, further reducing toxic and harmful gases and solid particles, ensuring sufficient purification. An additional barrier layer is added above the gas tower to fully intercept and filter the purified gas, preventing solid particles from escaping and facilitating repeated recycling. At the same time, this utility model utilizes the characteristic that solid particles easily settle to fully realize self-circulating filtration. Even after the waste gas is stopped being transported, multiple circulation filtrations of the internal gas can still be achieved, greatly improving the washing and purification effect. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the environmentally friendly and efficient waste gas scrubbing tower of this utility model.

[0016] Figure 2 This is an exploded view of the environmentally friendly and efficient waste gas scrubbing tower of this utility model.

[0017] Figure 3 This is the front view of the environmentally friendly and efficient waste gas scrubbing tower of this utility model.

[0018] Figure 4 This is a front sectional view of the environmentally friendly and efficient waste gas scrubbing tower of this utility model.

[0019] Figure 5 yes Figure 4 A magnified view of part A in the middle.

[0020] The components in the attached diagram are labeled as follows: 10. Water tower; 11. Drain outlet; 12. Slag discharge pipe; 13. Nozzle; 15. Filter cavity; 20. Gas tower; 21. Purification cavity; 23. Recovery layer; 231. Mounting ring; 232. Pipeline; 233. Recovery cavity; 234. Exhaust shell; 235. Mounting cavity; 236. Air inlet channel; 237. Exhaust fan; 238. Air inlet; 239. Through hole; 25. Air inlet pipe; 26. Barrier layer; 27. Top cover; 28. Exhaust outlet; 29. ​​Air filter layer. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] Please see Figure 1 , Figure 3This utility model provides an environmentally friendly and efficient waste gas scrubbing tower, including a water tower 10 and a gas tower 20. The water tower 10 is located below the gas tower 20 and is interconnected with it. The water tower 10 and the gas tower 20 can be detachably connected as a single unit. This utility model reduces the overall volume of the equipment by using a top-bottom arrangement. The water tower 10 is filled with a purification liquid, which includes, but is not limited to, lime slurry and alkaline solution, used to balance the acidic substances in the emitted flue gas to achieve neutral emission requirements. The water tower 10 is also equipped with a water pump (not shown in the figure), which pumps the purification liquid in the water tower 10 into and sprays it into the gas tower 20 to achieve purification liquid circulation. The side wall of the gas tower 20 is provided with an air inlet pipe 25, which is tubular and connects to the interior of the gas tower 20. At the same time, the gas tower 20 is connected to the exhaust pipe of an incinerator (not shown in the figure) through the air inlet pipe 25. The waste gas generated after combustion in the incinerator is introduced into the gas tower 20. The waste gas includes substances such as sulfur dioxide, nitrogen oxides, and heavy metals. The water pump sprays the purification liquid in the water tower 10 into the gas tower 20 to neutralize and purify the waste gas in the gas tower 20, reduce harmful and toxic gases, and ensure the safety of gas discharge. At the same time, the purification liquid after the purification spraying is completed flows back into the water tower 10, is filtered, and then recycled and sprayed again, realizing the recycling of the purification liquid.

[0023] Please see Figure 2 , Figure 4 The water tower 10 has a hollow, square shell structure with a filter cavity 15 inside. A drain port 11 is located on the top surface of the water tower 10, penetrating the wall of the water tower 10 and connecting to the filter cavity 15. The drain port 11 also connects to the internal cavity of the gas tower 20. A sludge discharge pipe 12 is provided on the bottom wall of the water tower 10. One end of the sludge discharge pipe 12 penetrates the bottom wall of the water tower 10 and extends into the filter cavity 15. The other end of the sludge discharge pipe 12 extends away from the bottom wall of the water tower 10. A one-way valve (not shown in the figure) is provided at the end of the sludge discharge pipe 12 away from the bottom wall of the water tower 10. Preferably, the one-way valve 19 includes, but is not limited to, an electromagnetic one-way valve. The one-way valve controls the opening and closing of the sludge discharge pipe 12, thereby discharging the sludge deposited in the sludge discharge pipe 12.

[0024] In this embodiment, the bottom wall of the water tower 10 is funnel-shaped, meaning its cross-section is bottomed in the center and higher at both ends. The sludge discharge pipe 12 is installed at the center of the bottom wall of the water tower 10, allowing the sludge deposited on the bottom wall of the water tower 10 to flow quickly and stably into the sludge discharge pipe 12 under its own weight. This invention, through the funnel-shaped bottom wall of the water tower 10, prevents sludge accumulation and ensures the filtration and recycling effect of this invention. When the sludge reaches a fixed amount, the one-way valve is activated to discharge the sludge, ensuring filtration stability and achieving quantitative sludge discharge.

[0025] Furthermore, please refer again. Figure 2 , Figure 4 The gas tower 20 is a cylindrical structure with openings at both ends. A purification cavity 21 is formed inside the gas tower 20. The lower opening of the gas tower 20 abuts against the upper top surface of the water tower 10. The purification cavity 21 is interconnected with the filter cavity 15 through a drain port 11. An air filter layer 29 is provided at the upper opening of the gas tower 20, located above the air inlet pipe 25. During use, exhaust gas generated after combustion in the incinerator is introduced into the purification cavity 21 using an air extraction device (not shown), such as an air pump. Then, the purification liquid from the water tower 10 is sprayed into the purification cavity 21 using a water pump, achieving neutralization and purification of the exhaust gas, reducing harmful and toxic gases, and ensuring the safety of gas discharge. Simultaneously, particulate matter in the exhaust gas mixes with the purification liquid to form a mixture, which flows into the water tower 10 through the drain port 11, achieving the recovery of the purification liquid. The treated gas passes through the air filter layer 29 to complete the exhaust.

[0026] In this embodiment, the air filter layer 29 is made of activated carbon filter mesh to block and filter out particulate matter in the exhaust gas, ensuring the stability and safety of gas discharge. At the same time, the activated carbon filter mesh can also adsorb water vapor, thereby reducing the moisture content in the discharged gas, reducing the total emissions, and improving the stability of use.

[0027] In this embodiment, a nozzle 13 is provided on the surface of the air filter layer 29 facing the purification cavity 21. The nozzle 13 is connected to the purification liquid in the water tower 10. The nozzle 13 is used to atomize and spray the purification liquid into the purification cavity 21 to purify the exhaust gas.

[0028] Further, please refer to Figure 4 , Figure 5 The top of the gas tower 20, above the air filter layer 29, has a recovery layer 23. The recovery layer 23 includes a mounting ring 231, which is a ring-shaped structure with openings on both sides. The inner ring wall of the mounting ring 231 forms a recovery cavity 233. One side of the mounting ring 231 abuts against the top surface of the gas tower 20, and the side of the mounting ring 231 away from the gas tower 20 has a barrier layer 26. The barrier layer 26 is made of glass fiber and is used to intercept particulate matter in the air. The barrier layer 26 has pores (not shown in the figure) to ensure that the gas passes through while reducing the speed of the gas passing through. In use, the exhaust gas after spray filtration passes through the air filter layer 29 and enters the recovery cavity 233. The exhaust gas containing small particles gradually settles to the bottom of the recovery cavity 233, i.e., the top of the air filter layer 29, under the obstruction of the barrier layer 26, thus achieving secondary filtration.

[0029] In this embodiment, the recovery cavity 233 is formed by the air filter layer 29, the barrier layer 26, and the inner ring wall of the mounting ring 231. To ensure the recovery cavity 233 is sealed, a top cover 27 is provided above the recovery layer 23, and an exhaust port 28 is provided at the top of the top cover 27. The exhaust port 28 penetrates the wall of the top cover 27 and connects to the recovery cavity 233. During use, the exhaust gas passes through the barrier layer 26 and is discharged into the atmosphere through the exhaust port 28, completing the exhaust gas washing and purification process.

[0030] The mounting ring 231 is provided with multiple pipes 232, one end of which is located inside the recovery cavity 233, and the other end of which is located outside the mounting ring 231. An air intake 238 is provided on the wall of the pipe 232 within the recovery cavity 233. The air intake 238 is funnel-shaped and communicates with the pipe 232. Simultaneously, the pipe 232 communicates with the recovery cavity 233 through the air intake 238. The air intake 238 faces the upper surface of the air filter layer 29. An air extraction device is used to recycle the dust-laden exhaust gas and small particles that have passed through the air filter layer 29, achieving cyclic filtration.

[0031] The end of the pipe 232 away from the mounting ring 231 is provided with an exhaust shell 234, which is sleeved on the air inlet pipe 25. An air inlet channel 236 is provided in the middle of the exhaust shell 234. The air inlet channel 236 penetrates the wall of the exhaust shell 234 and is arranged coaxially with the air inlet pipe 25. The air inlet channel 236 is connected to the exhaust pipe of the incinerator. An installation cavity 235 is formed inside the exhaust shell 234 around the air inlet pipe 25. The pipe 232 passes through the shell of the exhaust shell 234 and extends into the installation cavity 235. A through hole 239 is provided on the wall of the air inlet channel 236. An exhaust fan 237 is also provided in the installation cavity 235. The air inlet of the exhaust fan 237 is connected to the pipe 232, and the air outlet of the exhaust fan 237 is connected to the through hole 239. The exhaust fan 237 is a common smoke exhaust fan on the market, which is used to draw the air in the pipe 232 into the air inlet channel 236.

[0032] In use, by starting the exhaust fan 237, the air in the pipe 232 is drawn into the air intake channel 236, thereby drawing the dust-laden exhaust gas and small particles in the recovery cavity 233 into the air intake channel 236. The dust-laden exhaust gas and particulate matter are then introduced into the gas tower 20 along with the exhaust gas from the incinerator to achieve spray purification.

[0033] In another embodiment, the waste gas from the incinerator is stopped, and only the dust-laden waste gas and particulate matter in the recovery cavity 233 are subjected to circulating spray treatment to increase the number of purification cycles and ensure the adequacy of purification.

[0034] The specific operation method of this utility model is as follows: Step 1: The waste gas generated after incineration in the incinerator is introduced into the gas tower 20, and the purification liquid in the water tower 10 is sprayed into the gas tower 20 by the water pump to neutralize and purify the waste gas in the gas tower 20 and reduce harmful and toxic gases.

[0035] Step 2: By starting the exhaust fan 237, the air in the pipe 232 is drawn into the air intake channel 236, thereby drawing the dust-laden waste gas and small particles in the recovery cavity 233 into the air intake channel 236. The dust-laden waste gas and particulate matter are then introduced into the gas tower 20 along with the waste gas from the incinerator to achieve secondary spray purification.

[0036] This invention performs secondary recycling and purification of the exhaust gas after spray purification, further reducing toxic and harmful gases and solid particles, ensuring sufficient purification. An additional barrier layer 26 is added above the gas tower 20 to fully intercept and filter the purified gas, preventing solid particles from escaping and facilitating repeated recycling. At the same time, this invention utilizes the characteristic that solid particles easily settle to fully realize self-circulating filtration. Even after the exhaust gas is stopped, the internal gas can still be circulated and filtered multiple times, greatly improving the washing and purification effect.

[0037] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An environmentally friendly and efficient waste gas scrubbing tower, comprising a water tower (10) and a gas tower (20), wherein the water tower (10) is filled with a purification liquid, and the gas tower (20) has an air inlet pipe (25) on its side wall, the air inlet pipe (25) connecting to the interior of the gas tower (20), and the top of the gas tower (20) is provided with an air filter layer (29), the air filter layer (29) being located above the air inlet pipe (25), characterized in that, The top of the gas tower (20) is provided with a recovery layer (23) above the air filter layer (29). The recovery layer (23) is connected to the air inlet pipe (25). The recovery layer (23) includes an installation ring (231) installed on the top surface of the gas tower (20). The side of the installation ring (231) away from the gas tower (20) is provided with a blocking layer (26). A pipe (232) is provided inside the installation ring (231). The air filter layer (29), the blocking layer (26) and the inner ring wall of the installation ring (231) together form a recovery cavity (233). One end of the pipe (232) is located inside the recovery cavity (233), and the other end of the pipe (232) is connected to the air inlet pipe (25).

2. The environmentally friendly and efficient waste gas scrubbing tower according to claim 1, characterized in that, The pipe (232) is provided with an air intake (238) on the wall inside the recovery cavity (233). The air intake (238) is funnel-shaped and is connected to the pipe (232). At the same time, the air intake (238) is connected to the recovery cavity (233). The air intake (238) is directly facing the upper surface of the air filter layer (29).

3. The environmentally friendly and efficient waste gas scrubbing tower according to claim 1, characterized in that, The pipe (232) is provided with an exhaust shell (234) at one end away from the mounting ring (231). The exhaust shell (234) is sleeved on the air inlet pipe (25). An air inlet channel (236) is provided in the middle of the exhaust shell (234). The air inlet channel (236) penetrates the wall of the exhaust shell (234) and is arranged coaxially with the air inlet pipe (25). The air inlet channel (236) is connected to the exhaust pipe of the incinerator.

4. The environmentally friendly and efficient waste gas scrubbing tower according to claim 3, characterized in that, The exhaust shell (234) has an installation cavity (235) formed inside the air inlet pipe (25). The pipe (232) passes through the shell of the exhaust shell (234) and extends into the installation cavity (235). The wall of the air inlet channel (236) is provided with a through hole (239). The installation cavity (235) is also provided with an exhaust fan (237). The air inlet of the exhaust fan (237) is connected to the pipe (232), and the air outlet of the exhaust fan (237) is connected to the through hole (239).

5. The environmentally friendly and efficient waste gas scrubbing tower according to claim 1, characterized in that, The barrier layer (26) is made of glass fiber and has pores.

6. The environmentally friendly and efficient waste gas scrubbing tower according to claim 1, characterized in that, The recycling layer (23) is provided with a top cover (27), and the top of the top cover (27) is provided with an exhaust port (28). The exhaust port (28) penetrates the wall of the top cover (27) and connects to the recycling cavity (233).

7. The environmentally friendly and efficient waste gas scrubbing tower according to claim 1, characterized in that, The water tower (10) has a filter cavity (15) inside, and a drain port (11) is provided on the top surface of the water tower (10). The drain port (11) penetrates the wall of the water tower (10) and connects to the filter cavity (15) on the water tower (10). The gas tower (20) has a purification cavity (21) inside, and the lower opening of the gas tower (20) abuts against the upper top surface of the water tower (10). The purification cavity (21) and the filter cavity (15) are interconnected.

8. The environmentally friendly and efficient waste gas scrubbing tower according to claim 7, characterized in that, The air filter layer (29) has a nozzle (13) on its surface facing the purification cavity (21), and the nozzle (13) is connected to the purification liquid in the water tower (10).

9. The environmentally friendly and efficient waste gas scrubbing tower according to claim 7, characterized in that, The bottom wall of the water tower (10) is provided with a slag discharge pipe (12). One end of the slag discharge pipe (12) penetrates the bottom wall of the water tower (10) and extends into the interior of the filter cavity (15). The other end of the slag discharge pipe (12) extends away from the bottom wall of the water tower (10). A one-way valve is provided at the end of the slag discharge pipe (12) away from the bottom wall of the water tower (10).

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