Tail gas treatment device for landfill leachate evaporation

Abstract

The invention relates to the technical field of tail gas treatment after percolate evaporation, in particular to a tail gas treatment device for landfill percolate evaporation, which comprises an absorption tower and a high-energy ion deodorization purifier, an inlet and an outlet of the high-energy ion deodorization purifier are connected with a first fan and a second fan respectively, an air inlet of the first fan is connected with a tail gas emission source, an air outlet of the first fan is connected with the inlet of the high-energy ion deodorization purifier, and an air outlet of the second fan is connected with the air inlet. According to the high-energy ion deodorization purifier, a high-energy ion purification mode is adopted, a part of pollutants in tail gas are preliminarily decomposed and converted into CO2, H2O, heat and other substances, so that the purpose of preliminarily purifying a part of pollutants in the tail gas is achieved, then the tail gas discharged from the high-energy ion deodorization purifier is guided into an absorption tower, and the tail gas is subjected to spraying treatment through the absorption tower; and the purpose of separating and purifying pollutants in the tail gas again is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas treatment after leachate evaporation, in particular to a tail gas treatment device for garbage leachate evaporation. Background Art

[0002] Landfill leachate refers to a high-concentration organic wastewater formed by the water contained in the garbage itself in the landfill, rainwater and snow water entering the landfill, and other water, minus the saturated water holding capacity of the garbage and the covering soil layer, and passing through the garbage layer and the covering soil layer. If the leachate is discharged into rivers and lakes without treatment, it will pollute aquatic organisms and crops, and harm human health through the food chain and the ecological environment; Evaporation treatment technology is one of the common landfill leachate treatment technologies. It mainly separates the gas and a small amount of solids in the leachate from the mixed liquid. The tail gas discharged from the landfill leachate evaporation treatment system has a temperature of about 100-110°C, and usually includes sulfur-containing, nitrogen-containing, oxygen-containing and hydrocarbon compounds, which are divided into two categories: organic and inorganic. In the prior art, an absorption tower is usually used to purify the tail gas separated from the leachate. When the absorption tower purifies the tail gas, the tail gas is introduced from the bottom of the tower and then discharged from the top of the tower, and the separation and absorption of substances are achieved through mass transfer between gas and liquid; According to a patent application with publication number CN118454381A, an absorption tower for treating tail gas from the production of butanol and octanol is disclosed. The specification states that "as for the existing absorption tower for treating tail gas from the production of butanol and octanol, the path of the tail gas flowing through the treatment tower is relatively short, so that the tail gas cannot be fully sprayed and purified. At the same time, the inside of the treatment tower is mostly sprayed only once, that is, the tail gas will only be sprayed once when flowing through the inside of the treatment tower, and the treatment effect is relatively poor." According to a patent application with publication number CN115350582B, a spray-type reaction tower for industrial tail gas treatment is disclosed. The specification states that "the tail gas residence time of the existing spray-type reaction tower is short during use, resulting in insufficient reaction between the liquid medicine and the tail gas, which affects the tail gas treatment efficiency of the equipment"; Since parameters such as gas flow rate, liquid flow rate, temperature and pressure will affect the rate and effect of material transfer in the absorption tower, the above-mentioned patent applications all point out that the existing absorption tower has a short gas residence time and movement path in the tower, which is mainly due to the fast gas flow rate resulting in insufficient contact between the gas and the sprayed reaction liquid, thereby causing the gas purification effect to be poor. In order to make the exhaust gas stay in the tower for a longer time and purify the exhaust gas more thoroughly, the prior art generally adopts the method of increasing the tower body height to increase the movement path of the exhaust gas in the tower, thereby extending the residence time of the exhaust gas in the tower. However, the problem with this method is that it increases the volume of the tower body, increases the difficulty of transportation and installation, and at the same time increases the production and transportation and installation costs. Secondly, the absorption tower generally only performs a single spray purification treatment on the exhaust gas, and the discharged exhaust gas will also contain some polluting gas components, so the exhaust gas cannot be fully treated. Summary of the invention

[0003] To achieve the above-mentioned object, the present invention provides the following technical scheme: a tail gas treatment device for evaporation of landfill leachate, comprising an absorption tower and a high-energy ion deodorization purifier, wherein the absorption tower is provided with an air inlet, a first inlet and a second inlet, the inlet and outlet of the high-energy ion deodorization purifier are respectively connected to a first fan and a second fan, the air inlet of the first fan is connected to a tail gas emission source and the air outlet is connected to the inlet of the high-energy ion deodorization purifier, and the air outlet of the second fan is connected to the air inlet, so as to pass the tail gas after the initial purification in the high-energy ion deodorization purifier into the absorption tower for secondary purification; It also includes a water tank, a reaction liquid tank and a mixing tank arranged outside the absorption tower, wherein the outside of the water tank is connected to a first water pump for pumping water inside the water tank through a pipeline, the outside of the reaction liquid tank is connected to a second water pump for pumping reaction liquid inside the reaction liquid tank through a pipeline, the outside of the mixing tank is connected to a third water pump for pumping mixed liquid inside the mixing tank through a pipeline, the third water pump is respectively connected to a first nozzle and a second nozzle through pipelines, one end of the first nozzle is connected to the first inlet, and one end of the second nozzle is connected to the second inlet; The absorption tower is provided with a first packing layer, a second packing layer and a demister in sequence from bottom to top, a first spray pipe group connected to the first inlet is provided between the demister and the second packing layer, a second spray pipe group connected to the second inlet is provided between the second packing layer and the first packing layer, the first spray pipe group and the second spray pipe group have the same structure, and the bottom end of one of the spray pipes of the two is connected to an auxiliary diffusion mechanism; The auxiliary diffusion mechanism includes a first pipe arranged vertically, the bottom end of the first pipe is vertically connected to a second pipe communicating with the inside thereof, both ends of the second pipe are rotatably connected to a shunt pipe, the shunt pipe is communicated with the inside of the second pipe, the shunt pipes in the upper and lower diffusion mechanisms are fixedly connected by a connecting rod, and a plurality of spray heads are arranged on the first spray pipe group, the second spray pipe group and the shunt pipe; A rotating mechanism is also provided inside the absorption tower, and the rotating mechanism includes a gear ring plate corresponding to the air inlet side, a plurality of swirl blades are provided on the outer surface of the gear ring plate, and the inner rack part of the swirl blade is meshed with two gears, and the bottom ends of the two diversion pipes of the auxiliary diffusion mechanism located below are respectively fixedly connected to the tops of the two gears.

[0004] Preferably, the height of the toothed ring plate is greater than the inner diameter of the air inlet, and the outer side surface of the toothed ring plate is arranged opposite to the air inlet, a gap is provided between the swirl blade and the inner wall of the absorption tower, and the toothed ring plate and two gears are respectively rotatably connected to the bottom end of the absorption tower.

[0005] Preferably, the upper and lower shunt pipes of the auxiliary diffusion mechanism respectively penetrate the second packing layer and the first packing layer, and the first packing layer and the second packing layer have the same composition structure and are both composed of a bottom carrier plate, a ball ring packing and a top pressure plate.

[0006] Preferably, baffles are provided at the bottom edge of the bottom carrier plates of the first packing layer and the second packing layer. The cross section of the baffle is a truncated cone structure with the top surface in contact with the inner wall of the absorption tower and the bottom surface away from the inner wall of the absorption tower. The baffle is provided to reduce the wall flow phenomenon inside the absorption tower.

[0007] Preferably, the inlet of the first water pump is connected to the water tank through a pipeline, and the outlet is connected to the mixing tank through a pipeline, the inlet of the second water pump is connected to the reaction liquid tank through a pipeline, and the outlet is connected to the mixing tank through a pipeline, and the inlet of the third water pump is connected to the mixing tank through a pipeline, and the outlet is connected to one end of the first nozzle and the second nozzle through pipelines respectively.

[0008] Preferably, an electric ball valve 1 and an electronic pressure gauge 1 are provided on the pipeline connecting the first water pump outlet and the mixing box, an electric ball valve 2 and an electronic pressure gauge 2 are provided on the pipeline connecting the second water pump outlet and the mixing box, and an electric ball valve 3 and an electric ball valve 4 are provided on the first nozzle and the second nozzle, respectively.

[0009] Preferably, the reaction liquid box and the mixing box are provided with a PH detector 1 and a PH detector 2 respectively, and the mixing box is also provided with an electronic pressure gauge 3.

[0010] Preferably, the electric ball valve 1, electric ball valve 2, electric ball valve 3 and electric ball valve 4 are opened and closed by remote control of PLC, and the electronic pressure gauge 1, electronic pressure gauge 2, electronic pressure gauge 3, PH detector 1 and PH detector 2 are all connected to the PLC for remote communication through a wireless communication module.

[0011] Preferably, the top of the absorption tower is provided with an exhaust duct interconnected with the interior thereof, and a sampling port for randomly sampling the internal gas is opened on the exhaust duct. Two steel ropes connected to the bottom surface are provided at both ends of the outer surface of the exhaust duct to enhance the stability between the absorption tower and the bottom surface. An escalator is also provided on the outside of the absorption tower to facilitate workers to climb.

[0012] Beneficial Effects Compared with the prior art, the present invention provides a tail gas treatment device for evaporation of landfill leachate, which has the following beneficial effects: By first introducing the tail gas into the high-energy ion deodorization purifier, a part of the pollutants in the tail gas are initially decomposed and converted into substances such as CO2, H2O and heat by using the high-energy ion purification method, thereby achieving the purpose of initially purifying a part of the pollutants in the tail gas, and then the tail gas discharged from the high-energy ion deodorization purifier is introduced into the absorption tower, and the purpose of separating and purifying the pollutants in the tail gas again is achieved through the spraying treatment of the absorption tower; By setting an auxiliary diffusion mechanism in the absorption tower, the first spray pipe group and the second spray pipe group spray downwards, and the diverter pipe in the auxiliary diffusion mechanism also sprays in multiple directions at the same time. Compared with the traditional absorption tower which only sprays from the top of the tower, the sprayed mixed liquid forms a fully dispersed phase and fully collides with the continuous phase gas, thereby improving the reaction efficiency and fully purifying the pollutant gas contained in the tail gas. The PLC remote control system can automatically proportion the mixed liquid required for spraying, automatically open and close the spraying state of the mixed liquid to be sprayed, and monitor and control the pressure, PH and on / off state of the required water, reaction liquid and mixed liquid in real time, which is highly efficient and saves labor; By setting a rotating mechanism at the bottom of the auxiliary diffusion mechanism, the rotating mechanism can further increase the spray to form a multi-angle dispersed phase when driving the diverter pipe to rotate, and use the collision, capture, turbulence and other effects between the spray and the gas to complete the mixing of gas and liquid to promote the full reaction of gas and liquid, and further improve the purification efficiency of tail gas; The gas purified by the high-energy ion deodorizer is introduced into the absorption tower along the air inlet to form an airflow. The airflow first acts on the swirl blades and drives the gear ring plate to rotate, and then drives the diverter pipe in the auxiliary diffusion mechanism to rotate. The rotation power source of the diverter pipe relies on the kinetic energy provided by the gas flow to drive the gear ring plate to rotate. There is no need to add an additional drive system, which saves the cost of purification equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 This is a schematic diagram of the high-energy ion deodorizing purifier and the absorption tower combined to purify tail gas of the present invention; Figure 2 This is a schematic diagram of the absorption tower of the present invention and the connection structure of its internal and external parts; Figure 3 This is a schematic diagram of the external structure of the absorption tower of the present invention; Figure 4 This is a schematic diagram of the internal structure of the absorption tower of the present invention; Figure 5 It is a schematic cross-sectional view of the internal structure of the absorption tower of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the spraying process; Figure 7 For the present invention Figure 5 The rear side view of the display; Figure 8 For the present invention Figure 5 Bottom view of Fig. 9 A schematic diagram of dielectric barrier discharge of the high-energy ion deodorizing purifier of the present invention; Fig.10 A schematic diagram of the chemical reaction of high-energy ions in the high-energy ion deodorizing purifier of the present invention; Fig.11 It is a schematic diagram of energy transfer in the high-energy ion body of the high-energy ion deodorizing purifier of the present invention.

[0014] Description of reference numerals: 1. Absorption tower; 10. Air inlet; 101. First inlet; 102. Second inlet; 11. First packing layer; 111. Baffle; 12. Second packing layer; 13. Demister; 14. Exhaust duct; 141. Sampling port; 15. Escalator; 2. High-energy ion deodorizing purifier; 21. First fan; 22. Second fan; 3. Water tank; 31. First water pump; 4. Reaction liquid tank; 41. Second water pump; 5. Mixing box; 51. Third water pump; 52. First spray pipe; 521. First spray pipe group; 53. Second spray pipe; 531. Second spray pipe group; 54. First connecting pipe; 55. Second connecting pipe; 56. Diverter pipe; 6. Wire rope; 7. Gear ring plate; 71. Swirl blade; 72. Gear. DETAILED DESCRIPTION

[0015] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0016] Embodiment 1, as Figure 1-11 As shown, in order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tail gas treatment device for evaporation of landfill leachate, comprising an absorption tower 1 and a high-energy ion deodorization purifier 2, the absorption tower 1 is provided with an air inlet 10, a first inlet 101 and a second inlet 102, the inlet and outlet of the high-energy ion deodorization purifier 2 are respectively connected with a first fan 21 and a second fan 22, the first fan 21 and the second fan 22 are both glass fiber reinforced plastic fans, the air inlet of the first fan 21 is connected to the tail gas emission source and the air outlet is connected to the inlet of the high-energy ion deodorization purifier 2, the air outlet of the second fan 22 is connected to the air inlet 10, and is used to pass the tail gas after the initial purification in the high-energy ion deodorization purifier 2 into the absorption tower 1 for secondary purification, and the tail gas is purified twice in succession by the two devices, thereby improving the purification effect of the tail gas; like Figure 1 As shown, the tail gas discharged from the evaporation treatment system is first introduced into the high-energy ion deodorization purifier 2 through the first fan 21. The high-energy ion deodorization purifier 2 is a kind of ion deodorization equipment. According to the prior art, the high-energy ion deodorization purifier 2 has the advantages of small size and light weight. Its floor area is only 1 / 5-1 / 10 of that of the biological deodorization equipment. It is suitable for special spaces such as compact layout and small site. It also has the advantages of low power, low noise, low energy consumption and convenient installation and commissioning. like Fig. 9 As shown, the high-energy ion deodorizing purifier 2 adopts a dielectric barrier discharge method when purifying and separating pollutants in the tail gas. The dielectric barrier discharge is a discharge method for obtaining high-energy ions under high pressure. This discharge is generated between two electrodes. The dielectric barrier discharge has the high-pressure operation characteristics of uniform discharge and corona discharge. The role of the dielectric layer on the discharge is mainly: first, to limit the movement of charged particles in the micro-discharge, so that the micro-discharge becomes a short pulse; second, to make the micro-discharge evenly and stably distributed between the entire planar electrodes to prevent spark discharge; Among them, high-energy plasma is the fourth state of matter after solid, liquid and gas. When the external voltage reaches the discharge voltage of the gas, the gas is broken down to produce a mixture including electrons, various ions, atoms and free radicals. The high-energy plasma degrades pollutants by using these high-energy electrons, free radicals and other active particles to interact with the pollutants in the exhaust gas, so that the molecules of the pollutants are decomposed in a very short time. The principle of high energy plasma purifying tail gas is: Fig.10 and Fig.11 As shown in the figure, during the dielectric barrier discharge process, electrons obtain energy from the electric field, and convert the energy into the internal energy or kinetic energy of the pollutant molecules through collision. These molecules that obtain energy are excited or ionized to form active groups. At the same time, the oxygen and water in the air can also produce a large number of new ecological hydrogen, ozone, hydroxyl oxygen and other active groups under the action of high-energy electrons. After these active groups collide with each other, they trigger a series of complex physical and chemical reactions. From the composition of the active groups of the high-energy ions, it can be seen that the high-energy ions are rich in particles with extremely high chemical activity, such as electrons, ions, free radicals and excited molecules. The pollutants in the exhaust gas react with these active groups with higher energy and are finally converted into substances such as CO2, H2O and heat, thereby achieving the purpose of purifying part of the pollutants in the exhaust gas. Furthermore, an exhaust duct 14 communicating with the interior of the absorption tower 1 is provided at the top thereof for discharging purified gas. A sampling port 141 for randomly sampling the internal gas is provided on the exhaust duct 14. Two steel wire ropes 6 connected to the bottom surface are provided at both ends of the outer surface of the exhaust duct 14 for strengthening the stability between the absorption tower 1 and the bottom surface. An escalator 15 is also provided outside the absorption tower 1 for workers to climb easily.

[0017] Embodiment 2, as Figure 1 , Figure 2 and Figure 4 As shown, a tail gas treatment device for evaporation of landfill leachate also includes a water tank 3, a reaction liquid tank 4 and a mixing tank 5 arranged outside the absorption tower 1, the outside of the water tank 3 is connected to a first water pump 31 for pumping water inside the water tank 3 through a pipeline, the outside of the reaction liquid tank 4 is connected to a second water pump 41 for pumping the reaction liquid inside the reaction liquid tank 4 through a pipeline, the outside of the mixing tank 5 is connected to a third water pump 51 for pumping the mixed liquid inside the mixing tank 5 through a pipeline, the third water pump 51 is respectively connected to a first nozzle 52 and a second nozzle 53 through pipelines, one end of the first nozzle 52 is connected to the first inlet 101, and one end of the second nozzle 53 is connected to the second inlet 102, by adding water into the water tank 3 and adding reaction liquid into the reaction liquid tank 4, the two are pumped into the mixing tank 5 by the water pump, so as to facilitate mixing and proportioning the two inside the mixing tank 5, and a stirring mechanism can be arranged in the mixing tank 5 to facilitate uniform mixing of the mixed liquid of the two, and then the mixed liquid is pumped into the first nozzle 52 and the second nozzle 53 by the water pump through the pipeline; Furthermore, the inside of the absorption tower 1 is provided with a first packing layer 11, a second packing layer 12 and a demister 13 in sequence from bottom to top, a first spray pipe group 521 connected to the first inlet 101 is provided between the demister 13 and the second packing layer 12, a second spray pipe group 531 connected to the second inlet 102 is provided between the second packing layer 12 and the first packing layer 11, the first spray pipe group 521 and the second spray pipe group 531 have the same structure and one of the spray pipes of the two is connected to an auxiliary diffusion mechanism at the bottom end, and the mixed liquid in the first spray pipe 52 and the second spray pipe 53 is pumped into the first spray pipe group 521 and the second spray pipe group 531 respectively; Furthermore, a baffle 111 is provided at the bottom edge of the bottom carrier plate of the first packing layer 11 and the second packing layer 12. The cross section of the baffle 111 is a truncated cone structure with the top surface in contact with the inner wall of the absorption tower 1 and the bottom surface away from the inner wall of the absorption tower 1. The baffle 111 is provided to reduce the wall flow phenomenon inside the absorption tower 1. Further, the inlet of the first water pump 31 is connected to the water tank 3 through a pipeline, and the outlet is connected to the mixing tank 5 through a pipeline, the inlet of the second water pump 41 is connected to the reaction liquid tank 4 through a pipeline, and the outlet is connected to the mixing tank 5 through a pipeline, the inlet of the third water pump 51 is connected to the mixing tank 5 through a pipeline, and the outlet is connected to one end of the first nozzle 52 and the second nozzle 53 through pipelines, respectively, an electric ball valve 1 and an electronic pressure gauge 1 are provided on the pipeline connecting the outlet of the first water pump 31 and the mixing tank 5, and the pipeline connecting the outlet of the second water pump 41 and the mixing tank 5 is connected to the mixing tank 5 through a pipeline. The first nozzle 52 and the second nozzle 53 are respectively provided with an electric ball valve 3 and an electric ball valve 4. The reaction liquid tank 4 and the mixing tank 5 are respectively provided with a PH detector 1 and a PH detector 2. The mixing tank 5 is also provided with an electronic pressure gauge 3. The reaction liquid tank 4 is mainly used to contain acidic or alkaline solutions, such as sulfuric acid or sodium hydroxide solutions. Therefore, the PH detectors provided on the reaction liquid tank 4 and the mixing tank 5 can intuitively display the PH values ​​of the reaction liquid and the mixed liquid, which brings certain convenience to the preparation of the mixed liquid. Furthermore, the electric ball valve 1, the electric ball valve 2, the electric ball valve 3 and the electric ball valve 4 are opened and closed by the PLC remote control, and the electronic pressure gauge 1, the electronic pressure gauge 2, the electronic pressure gauge 3, the PH detector 1 and the PH detector 2 are all connected to the PLC remote communication module through the wireless communication module. The electronic pressure gauge 1 and the electronic pressure gauge 2 are monitored in real time by the PLC remote control system, so that water is automatically added to the water tank 3 and the reaction liquid is added to the reaction liquid tank 4 according to the pressure values ​​of the two, so that the water tank 3 and the reaction liquid tank 4 are kept within a constant pressure range, and the concentration of the mixed liquid in the mixing box 5 is adjusted by the set value of the automatic proportioning system of the PLC, and the adjusted concentration value is compared with the display value of the PH detector 2 on the mixing box 5. If the set concentration value of the mixed liquid is consistent with the display value of the PH detector 2, the adjustment is qualified, if not, the concentration is considered unqualified and the adjustment is continued; When preparing the mixed liquid: remotely control the electric ball valve 1 and the electric ball valve 2 to open at the same time through the PLC, and control the first water pump 31 and the second water pump 41 to open at the same time to pump the water in the water tank 3 and the reaction liquid in the reaction liquid tank 4 into the mixing box 5 at the same time, and cooperate with the stirring mechanism provided in the mixing box 5 to stir and mix, and monitor the concentration of the mixed liquid in real time according to the display value of the PH detector 2 on the mixing box 5. When the display value of the PH detector 2 is consistent with the set value of the automatic proportioning system of the PLC, close the electric ball valve 1 and the electric ball valve 2 to complete the proportioning of the mixed liquid.

[0018] Embodiment three, as Figure 4 , Figure 5 and Figure 6As shown, the auxiliary diffusion mechanism includes a vertically arranged first connecting pipe 54, the bottom end of the first connecting pipe 54 is vertically connected to a second connecting pipe 55 which is interconnected with the inside thereof, and the two ends of the second connecting pipe 55 are respectively rotatably connected to it with a shunt pipe 56, the shunt pipe 56 is interconnected with the inside of the second connecting pipe 55, and the shunt pipe 56 in the upper and lower diffusion mechanisms are fixedly connected by a connecting rod, and the first spray pipe group 521, the second spray pipe group 531 and the shunt pipe 56 are all provided with a plurality of spray heads, and the shunt pipes 56 of the upper and lower auxiliary diffusion mechanisms are respectively movable through the second packing layer 12 and the first packing layer 11, and the composition structure of the first packing layer 11 and the second packing layer 12 is the same and is composed of a bottom carrier plate, a ball ring packing and a top pressure plate. After the mixed liquid in the mixing box 5 is proportioned, the electric ball valve 3 is opened by remote control of the PLC, and at this time, the first spray pipe The mixed liquid in 52 is pumped into the first spray pipe group 521, and the mixed liquid in the second spray pipe 53 is pumped into the second spray pipe group 531. The mixed liquid in the first spray pipe group 521 and the second spray pipe group 531 is sprayed through their several spray heads. At the same time, the mixed liquid in the first spray pipe group 521 and the second spray pipe group 531 are respectively transported to the diversion pipe 56 through the first connecting pipe 54 and the second connecting pipe 55, and the mixed liquid in the diversion pipe 56 is sprayed through its several spray heads. Compared with the traditional absorption tower which only sprays from the top of the tower, the sprayed mixed liquid forms a sufficient dispersed phase, fully collides with the continuous phase gas, improves the reaction efficiency, and fully purifies the contained pollutant gas. The process is automatically carried out through the PLC remote control system without the need for manual supervision and operation. It is not only efficient but also saves labor costs.

[0019] Embodiment 4, as Figure 5-8 As shown, a rotating mechanism is also provided inside the absorption tower 1, and the rotating mechanism includes a toothed ring plate 7 corresponding to one side of the air inlet 10, and a plurality of swirl blades 71 are provided on the outer surface of the toothed ring plate 7, and the inner rack part of the swirl blade 71 is meshed with two gears 72, and the bottom ends of the two shunt pipes 56 of the auxiliary diffusion mechanism located below are respectively fixedly connected to the tops of the two gears 72, and when the toothed ring plate 7 rotates, the two gears 72 can be driven to rotate at the same time, thereby driving the shunt pipe 56 to rotate, and when the shunt pipe 56 rotates, the multi-angle dispersed phase formed by the spray can be further increased, and the collision, capture, turbulence and other effects between the spray and the gas are used to complete the mixing of the gas and liquid to promote the full reaction of the gas and liquid, and further improve the purification efficiency of the tail gas; Furthermore, the height of the toothed ring plate 7 is greater than the inner diameter of the air inlet 10, and the outer side surface of the toothed ring plate 7 is arranged opposite to the air inlet 10. A gap is provided between the swirl blade 71 and the inner wall of the absorption tower 1. The toothed ring plate 7 and the two gears 72 are rotatably connected to the bottom end of the absorption tower 1 respectively. The gas purified by the high-energy ion deodorizer 2 is introduced into the absorption tower 1 along the air inlet 10 to form an airflow. The airflow first acts on the swirl blade 71 and drives the toothed ring plate 7 to rotate, and then drives the diverter pipe 56 in the auxiliary diffusion mechanism to rotate. The rotation power source of the diverter pipe 56 relies on the kinetic energy provided by the gas flow to drive the toothed ring plate 7 to rotate. There is no need to add an additional drive system, which has the effect of saving the cost of purification equipment.

[0020] When the above embodiment is working, the tail gas discharged from the evaporation treatment system is first introduced into the high-energy ion deodorization purifier 2 through the first fan 21. During the blocking discharge process of the tail gas inside the high-energy ion deodorization purifier 2, the electrons obtain energy from the electric field, and convert the energy into the internal energy or kinetic energy of the pollutant molecules through collision. These molecules that obtain energy are excited or ionized to form active groups. At the same time, the oxygen and moisture in the air can also produce a large number of new ecological hydrogen, ozone and hydroxyl oxygen and other active groups under the action of high-energy electrons. After these active groups collide with each other, they trigger a series of complex physical and chemical reactions. It can be seen from the active group composition of the high-energy ion body that the high-energy ion body is rich in particles with extremely high chemical activity, such as electrons, ions, free radicals and excited molecules. The pollutants in the tail gas react with these active groups with higher energy and are finally converted into substances such as CO2, H2O and heat, thereby achieving the purpose of purifying part of the pollutants in the tail gas; Subsequently, the tail gas after the initial purification in the high-energy ion deodorizing purifier 2 is introduced into the absorption tower 1 through the second blower 22, and the electric ball valve 1 and the electric ball valve 2 are opened simultaneously through the PLC remote control, and the first water pump 31 and the second water pump 41 are controlled to be opened simultaneously to pump the water in the water tank 3 and the reaction liquid in the reaction liquid tank 4 into the mixing box 5 at the same time, and the stirring mechanism provided in the mixing box 5 is cooperated to stir and mix, and the concentration value of the mixed liquid is monitored in real time according to the display value of the PH detector 2 on the mixing box 5. When the display value of the PH detector 2 is consistent with the set value of the automatic proportioning system of the PLC, the electric ball valve 1 and the electric ball valve 2 are closed to complete the proportioning of the mixed liquid; When the proportioning of the mixed liquid in the mixing box 5 is completed, the electric ball valve 3 is opened by remote control of the PLC. At this time, the mixed liquid in the first nozzle 52 is pumped into the first spray pipe group 521, and the mixed liquid in the second nozzle 53 is pumped into the second spray pipe group 531. The mixed liquid in the first spray pipe group 521 and the second spray pipe group 531 is sprayed through their several spray heads. At the same time, the mixed liquid in the first spray pipe group 521 and the second spray pipe group 531 are respectively transported to the diverter pipe 56 through the first connecting pipe 54 and the second connecting pipe 55. The mixed liquid in the diverter pipe 56 is sprayed through its several spray heads. After the gas is introduced into the absorption tower 1 along the air inlet 10, an airflow is formed. The airflow first acts on the swirl blades 71 and drives the toothed ring plate 7 to rotate, and then drives the diverter pipe 56 in the auxiliary diffusion mechanism to rotate. The rotation power source of the diverter pipe 56 depends on the kinetic energy provided by the gas flow to drive the toothed ring plate 7 to rotate. When the diverter pipe 56 rotates, the spray can be further increased to form a multi-angle dispersed phase. Compared with the traditional absorption tower that only sprays from the top of the tower, the sprayed mixed liquid forms a sufficient dispersed phase and fully collides with the continuous phase gas, thereby improving the reaction efficiency and fully purifying the pollutant gas contained in the exhaust gas. Finally, the purified gas is discharged outward along the exhaust pipe 14.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device for evaporation of landfill leachate, comprising an absorption tower (1) and a high-energy ion deodorization purifier (2), characterized in that: The absorption tower (1) is provided with an air inlet (10), a first inlet (101) and a second inlet (102); the inlet and outlet of the high-energy ion deodorizing purifier (2) are respectively connected to a first fan (21) and a second fan (22); the air inlet of the first fan (21) is connected to an exhaust gas emission source and the air outlet is connected to the inlet of the high-energy ion deodorizing purifier (2); the air outlet of the second fan (22) is connected to the air inlet (10), so as to pass the exhaust gas after primary purification in the high-energy ion deodorizing purifier (2) into the absorption tower (1) for secondary purification; It also includes a water tank (3), a reaction liquid tank (4) and a mixing tank (5) arranged outside the absorption tower (1); the outside of the water tank (3) is connected to a first water pump (31) for pumping water inside the water tank (3) through a pipeline; the outside of the reaction liquid tank (4) is connected to a second water pump (41) for pumping reaction liquid inside the water tank (4) through a pipeline; the outside of the mixing tank (5) is connected to a third water pump (51) for pumping mixed liquid inside the mixing tank (5) through a pipeline; the third water pump (51) is respectively connected to a first nozzle (52) and a second nozzle (53) through pipelines; one end of the first nozzle (52) is connected to the first inlet (101), and one end of the second nozzle (53) is connected to the second inlet (102); The absorption tower (1) is provided with a first packing layer (11), a second packing layer (12) and a demister (13) in sequence from bottom to top; a first spray pipe group (521) connected to the first inlet (101) is provided between the demister (13) and the second packing layer (12); a second spray pipe group (531) connected to the second inlet (102) is provided between the second packing layer (12) and the first packing layer (11); the first spray pipe group (521) and the second spray pipe group (531) have the same structure and the bottom end of one of the spray pipes is connected to an auxiliary diffusion mechanism; The auxiliary diffusion mechanism comprises a first pipe (54) arranged vertically, the bottom end of the first pipe (54) being vertically connected to a second pipe (55) communicating with the inside thereof, the two ends of the second pipe (55) being rotatably connected to a shunt pipe (56) respectively, the shunt pipe (56) communicating with the inside of the second pipe (55), the shunt pipe (56) in the upper and lower diffusion mechanisms being fixedly connected via a connecting rod, and a plurality of spray heads being arranged on the first spray pipe group (521), the second spray pipe group (531) and the shunt pipe (56); A rotating mechanism is also provided inside the absorption tower (1), the rotating mechanism comprising a toothed ring plate (7) corresponding to one side of the air inlet (10), a plurality of swirl blades (71) being provided on the outer surface of the toothed ring plate (7), and two gears (72) being meshed with the inner rack portion of the swirl blade (71), and the bottom ends of the two diverter pipes (56) of the auxiliary diffusion mechanism located below are respectively fixedly connected to the tops of the two gears (72).

2. The tail gas treatment device for evaporation of landfill leachate according to claim 1, characterized in that: The height of the toothed ring plate (7) is greater than the inner diameter of the air inlet (10), and the outer side surface of the toothed ring plate (7) is arranged opposite to the air inlet (10). A gap is provided between the swirl blade (71) and the inner wall of the absorption tower (1). The toothed ring plate (7) and the two gears (72) are respectively rotatably connected to the bottom end of the absorption tower (1).

3. The tail gas treatment device for evaporation of landfill leachate according to claim 1, characterized in that: The upper and lower flow dividers (56) of the auxiliary diffusion mechanism respectively movably penetrate the second packing layer (12) and the first packing layer (11); the first packing layer (11) and the second packing layer (12) have the same composition structure and are both composed of a bottom carrier plate, a ball ring packing and a top pressure plate.

4. The tail gas treatment device for evaporation of landfill leachate according to claim 1, characterized in that: Baffles (111) are provided at the bottom edge of the bottom carrier plates of the first packing layer (11) and the second packing layer (12); the cross section of the baffles (111) is a truncated cone structure with the top surface in contact with the inner wall of the absorption tower (1) and the bottom surface away from the inner wall of the absorption tower (1); the baffles (111) are provided to reduce the wall flow phenomenon inside the absorption tower (1).

5. The tail gas treatment device for evaporation of landfill leachate according to claim 1, characterized in that: The inlet of the first water pump (31) is connected to the water tank (3) through a pipeline, and the outlet is connected to the mixing tank (5) through a pipeline. The inlet of the second water pump (41) is connected to the reaction liquid tank (4) through a pipeline, and the outlet is connected to the mixing tank (5) through a pipeline. The inlet of the third water pump (51) is connected to the mixing tank (5) through a pipeline, and the outlet is connected to one end of the first nozzle (52) and one end of the second nozzle (53) through pipelines.

6. The tail gas treatment device for evaporation of landfill leachate according to claim 1, characterized in that: An electric ball valve 1 and an electronic pressure gauge 1 are provided on the pipeline connecting the outlet of the first water pump (31) and the mixing box (5), an electric ball valve 2 and an electronic pressure gauge 2 are provided on the pipeline connecting the outlet of the second water pump (41) and the mixing box (5), and an electric ball valve 3 and an electric ball valve 4 are provided on the first nozzle (52) and the second nozzle (53), respectively.

7. The tail gas treatment device for evaporation of landfill leachate according to claim 6, characterized in that: The reaction liquid box (4) and the mixing box (5) are respectively provided with a pH detector 1 and a pH detector 2, and the mixing box (5) is also provided with an electronic pressure gauge 3.

8. The tail gas treatment device for evaporation of landfill leachate according to claim 7, characterized in that: The electric ball valve 1, electric ball valve 2, electric ball valve 3 and electric ball valve 4 are opened and closed by remote control of PLC, and the electronic pressure gauge 1, electronic pressure gauge 2, electronic pressure gauge 3, PH detector 1 and PH detector 2 are all connected to the PLC for remote communication through a wireless communication module.

9. The tail gas treatment device for evaporation of landfill leachate according to claim 1, characterized in that: The top of the absorption tower (1) is provided with an exhaust pipe (14) communicating with the interior thereof. The exhaust pipe (14) is provided with a sampling port (141) for randomly sampling the internal gas. Two steel wire ropes (6) connected to the bottom surface are provided at both ends of the outer surface of the exhaust pipe (14) for strengthening the stability between the absorption tower (1) and the bottom surface. An escalator (15) is also provided outside the absorption tower (1) for workers to climb up.

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