Industrial waste gas treatment device

Abstract

The utility model discloses an industrial waste gas treatment device, and relates to the technical field of gas separation, the industrial waste gas treatment device comprises a spraying tank and a liquid storage box, a plurality of treatment assemblies are sequentially arranged in the spraying tank from top to bottom, each treatment assembly comprises a filler layer, the treatment assembly further comprises a separation unit, the separation unit is provided with a plurality of micropores, and the micropores are communicated with the liquid storage box. A collecting pipe is arranged in the side wall of the spraying tank, the upper end of the collecting pipe is flush with and communicated with the upper surface of the separation unit, the lower end of the collecting pipe is communicated with the liquid storage tank, and liquid on the upper surface of the separation unit flows into the liquid storage tank through the collecting pipe. After the separation unit and the collecting pipe are arranged, the micropores in the separation unit can prevent liquid from flowing towards the filler layer below, but gas still can flow upwards, the liquid gathered on the separation unit flows back to the liquid storage tank through the collecting pipe, and the liquid can be repeatedly used after being filtered by the liquid storage tank, so that the separation effect is improved. And it is ensured that each treatment assembly is not affected by the upper-layer treatment assembly, so that the filler layer is not blocked.

Description

Technical Field

[0001] The present application relates to the technical field of gas separation, and in particular to an industrial waste gas treatment device. Background Art

[0002] Industrial waste gas is the exhaust gas generated during industrial production. It contains a large amount of gaseous or solid harmful substances. If it is directly discharged into the air, it will cause serious environmental pollution. Therefore, factories are currently required to treat the waste gas in advance and only discharge it after it meets the requirements.

[0003] For waste gas, after solid-gas separation treatment, most of the solid particles in the waste gas have been processed, and the remaining gas that contains almost no solid particles can dissolve most of the harmful substances in the gas in the liquid after spraying treatment, achieving the effect of waste gas treatment. However, waste gas and liquid may produce water-insoluble solid substances during the reaction process. These solid substances plus a small amount of solid particles in the original waste gas will cause the nozzle to be blocked during the liquid recycling process. In order to solve the problem of nozzle blockage, CN221358796U proposed a spray reaction tower for industrial waste gas treatment. The patent sets a filter screen in the filter box to filter solid impurities in the liquid, which has the effect of avoiding nozzle blockage.

[0004] However, in the prior art including the above-mentioned patent, after increasing the contact surface and contact time between gas and liquid by using multiple packing layers arranged in sequence from top to bottom, the liquid that has fully reacted with the gas will flow downward. At this time, these liquids will mix with the liquid sprayed below. Since the liquid that has reacted with the gas contains a large amount of impurities that cannot react with the gas again, the liquid sprayed below will also contain a large amount of impurities after mixing, which can easily cause blockage of the packing layer below, thereby reducing the treatment effect of the liquid sprayed below on the gas. Utility Model Content

[0005] An embodiment of the present application provides an industrial waste gas treatment device to solve the problem in the prior art that the downward flow of liquid in the upper packing layer easily causes blockage of the lower packing layer.

[0006] An embodiment of the present application provides an industrial waste gas treatment device, including a spray tank and a liquid storage tank, the liquid storage tank is connected to the inlet of a booster pump, the outlet of the booster pump is connected to a spray pipe located inside the spray tank through a water pipe, a spray pipe is provided with a nozzle, a plurality of treatment components are arranged in sequence from top to bottom inside the spray tank, each treatment component includes a packing layer, the treatment component also includes a separation unit, the separation unit is located below the packing layer, the separation unit has a plurality of micropores, a collecting pipe is provided in the side wall of the spray tank, the upper end of the collecting pipe is flush with and connected to the upper surface of the separation unit, the lower end of the collecting pipe is connected to the liquid storage tank, the liquid on the upper surface of the separation unit flows into the liquid storage tank through the collecting pipe.

[0007] In a possible implementation, the separation unit includes an upper pressing plate, a lower pressing plate, and a separation membrane, and the separation membrane is sandwiched between the upper pressing plate and the lower pressing plate.

[0008] In a possible implementation, both the upper pressing plate and the lower pressing plate are spherical structures.

[0009] In a possible implementation, the separation membrane is a PET (polyethylene terephthalate) membrane, and the micropores on the separation membrane are formed by heavy ion bombardment.

[0010] In a possible implementation, the separation unit is arranged obliquely inside the spray tank, and the upper end of the collecting pipe is flush with the lowest position of the separation unit.

[0011] In a possible implementation, the processing assembly further includes a holding plate, which is fixedly disposed on the inner side of the spray tank, and the filler layer is placed on the holding plate.

[0012] In a possible implementation, a plurality of through holes are provided on the containing plate.

[0013] In a possible implementation, a filter plate is disposed inside the liquid storage tank, and an inlet of the liquid storage tank and an inlet of the pressure pump are respectively located on two sides of the filter plate.

[0014] In a possible implementation, a conical air collecting hood is provided on the top of the spray tank, and an air outlet pipe is connected to the upper end of the air collecting hood.

[0015] An industrial waste gas treatment device in this application has the following advantages:

[0016] After setting up the separation unit and the collecting pipe, the micropores on the separation unit can prevent the liquid from flowing to the packing layer below, but the gas can still flow upward. The liquid gathered on the separation unit will flow back to the liquid storage tank through the collecting pipe. The liquid can be reused after being filtered by the liquid storage tank, ensuring that each processing component will not be affected by the upper processing components and cause the packing layer to be blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the overall structure of an industrial waste gas treatment device provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a processing component inside a spray tank provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the composition structure of the separation unit provided in an embodiment of the present application.

[0021] Explanation of the accompanying drawings: 100, spray tank; 101, holding plate; 102, packing layer; 103, separation unit; 104, collecting pipe; 105, upper pressure plate; 106, lower pressure plate; 107, separation membrane; 110, air inlet pipe; 120, air collecting hood; 130, air outlet pipe; 200, liquid storage tank; 210, pressure pump; 220, water pipe; 230, spray pipe; 231, nozzle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Figure 1-3 A schematic diagram of the structure of an industrial waste gas treatment device provided in an embodiment of the present application. The embodiment of the present application provides an industrial waste gas treatment device, including a spray tank 100 and a liquid storage tank 200, the liquid storage tank 200 is connected to the inlet of a booster pump 210, the outlet of the booster pump 210 is connected to a spray pipe 230 located inside the spray tank 100 through a water pipe 220, a spray pipe 230 is provided with a nozzle 231, a plurality of treatment components are arranged in sequence from top to bottom inside the spray tank 100, each treatment component includes a packing layer 102, the treatment component also includes a separation unit 103, the separation unit 103 is located below the packing layer 102, the separation unit 103 has a plurality of micropores, a collecting pipe 104 is arranged in the side wall of the spray tank 100, the upper end of the collecting pipe 104 is flush with and connected to the upper surface of the separation unit 103, the lower end of the collecting pipe 104 is connected to the liquid storage tank 200, and the liquid on the upper surface of the separation unit 103 flows into the liquid storage tank 200 through the collecting pipe 104.

[0024] Exemplarily, the spray tank 100 is a hollow cylindrical structure, and an air inlet pipe 110 is connected to the bottom of its outer side. The exhaust gas after solid-gas separation treatment is transported to the spray tank 100 through the air inlet pipe 110. During the spraying process, the gas flows upward inside the spray tank 100, and finally the treated exhaust gas is discharged from the exhaust pipe 130 at the top of the spray tank 100.

[0025] In the embodiment of the present application, a conical gas collecting hood 120 is provided on the top of the spray tank 100, and the gas outlet pipe 130 is connected to the upper end of the gas collecting hood 120. The diameter of the lower end of the gas collecting hood 120 is equal to the diameter of the spray tank 100, and the two are connected together through a flange structure. The diameter of the upper end of the gas collecting hood 120 is equal to the diameter of the gas outlet pipe 130, and the two are also connected together through a flange structure. After adopting the conical structure of the gas collecting hood 120, the treated exhaust gas will be collected through the gas collecting hood 120, so that all exhaust gas can be quickly discharged.

[0026] The number of spray pipes 230 is the same as the number of treatment components. A spray pipe 230 is arranged above each treatment component. Multiple spray pipes 230 are arranged in sequence from top to bottom. Each spray pipe 230 extends from the side wall of the spray tank 100 and is connected to the water pipe 220. After the pressure pump 210 draws liquid from the liquid storage tank 200, the liquid is pressurized and finally sprayed out from the nozzle 231. The sprayed liquid is tiny droplets with a large contact area, so it can fully contact with the exhaust gas, thereby having a better treatment effect.

[0027] The packing layer 102 is composed of a large number of Raschig rings. The Raschig rings have a large surface area. When a large number of Raschig rings are stacked together, they have a large number of pores. The liquid can flow through these pores from top to bottom, and the exhaust gas can also flow through these pores from bottom to top. After the liquid adheres to the surface of the Raschig ring, it can fully contact with the exhaust gas. In addition, the path length formed by the pores between the Raschig rings is large, so the contact time and area between the liquid and the exhaust gas are large, which further enhances the treatment effect of the exhaust gas.

[0028] In the embodiment of the present application, the processing assembly further includes a holding plate 101, which is fixedly arranged on the inner side of the spray tank 100, and the packing layer 102 is placed on the holding plate 101. The holding plate 101 can be fixed on the inner side of the spray tank 100 by welding or integral molding, and a plurality of through holes are arranged on the holding plate 101, and after the sprayed liquid flows down from the packing layer 102, it can continue to flow downward through the through holes on the holding plate 101.

[0029] There are at least two processing components in the embodiment of the present application, and the number of manifolds 104 is one less than the number of processing components, because the liquid gathered on the separation unit 103 in the processing component located at the bottom will flow directly to the inner bottom of the spray tank 100, and there is no need to use the manifold 104 for drainage. When there are multiple manifolds 104, it is necessary to stagger the multiple manifolds 104, that is, the multiple manifolds 104 are distributed at different positions in the side wall of the spray tank 100, but the multiple manifolds 104 will be connected to the liquid storage tank 200 at the lower end through the collection pipe. The liquid in the collection pipe and the bottom of the spray tank 100 flows into the liquid storage tank 200 through the inlet of the liquid storage tank 200. In the embodiment of the present application, a filter plate is arranged inside the liquid storage tank 200, and the inlet of the liquid storage tank 200 and the inlet of the booster pump 210 are respectively located on both sides of the filter plate. The number of filter plates may be one or more, and the filter holes on the filter plates can intercept solid impurities with larger diameters in the liquid, ensuring that the liquid transported by the pressure pump 210 will not cause clogging of the nozzle 231 .

[0030] In a possible embodiment, the separation unit 103 includes an upper pressing plate 105 , a lower pressing plate 106 , and a separation membrane 107 , and the separation membrane 107 is sandwiched between the upper pressing plate 105 and the lower pressing plate 106 .

[0031] Exemplarily, the separation membrane 107 is a PET membrane, and the micropores on the separation membrane 107 are formed by heavy ion bombardment. In the embodiment of the present application, the diameter of the micropores on the PET membrane is less than 50 microns, preferably 10 to 40 microns. The liquid used in the spraying process is water. Since PET is a hydrophobic material, the micropores below 50 microns can ensure that water will not pass through the separation membrane 107, but the gas can pass through, thereby intercepting the water. At the same time, during the flow of the exhaust gas from bottom to top, the exhaust gas can also be divided into a large number of tiny bubbles through the micropores, and these bubbles can contact with the sprayed tiny droplets, further improving the exhaust gas treatment effect.

[0032] After adopting the separation unit 103 and the collecting pipe 104, the water in each treatment unit can be gathered on the upper surface of the separation unit 103, and after being drained by the collecting pipe 104, the water in all treatment components will be concentrated in the liquid storage tank 200, and the water flowing down from the upper packing layer 102 will not enter the lower packing layer 102, so it will not cause the lower packing layer 102 to be blocked due to the accumulation of a large amount of solid impurities, thereby effectively improving the exhaust gas treatment effect.

[0033] Furthermore, both the upper pressure plate 105 and the lower pressure plate 106 are spherical structures. After adopting the upper pressure plate 105 and the lower pressure plate 106 with spherical structures, the separation membrane 107 is also a spherical structure. Moreover, the upper pressure plate 105 and the lower pressure plate 106 are connected together at the edge, and the edge of the lower pressure plate 106 is fixedly connected to the inner side of the spray tank 100. The separation membrane 107 with a spherical structure can make the pressure exerted by the exhaust gas on each part of the separation membrane 107 basically equal, avoiding the separation membrane 107 being damaged due to excessive concentration of pressure. The upper pressure plate 105 and the lower pressure plate 106 are both mesh structures, and their function is to provide support for the separation membrane 107, while reducing the impact on the flow rate of the exhaust gas passing through the separation membrane 107.

[0034] Furthermore, the separation unit 103 is tilted inside the spray tank 100, and the upper end of the manifold 104 is flush with the lowest position of the separation unit 103. The tilted separation unit 103 can quickly collect the collected water and flow it into the manifold 104, thereby increasing the circulation speed of the water.

[0035] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An industrial waste gas treatment device, comprising a spray tank (100) and a liquid storage tank (200), wherein the liquid storage tank (200) is connected to the inlet of a booster pump (210), and the outlet of the booster pump (210) is connected to a spray pipe (230) located inside the spray tank (100) through a water pipe (220), and a spray head (231) is arranged on the spray pipe (230), and a plurality of treatment components are arranged in sequence from top to bottom inside the spray tank (100), and each of the treatment components comprises a packing layer (102), characterized in that: The treatment component further comprises a separation unit (103), wherein the separation unit (103) is located below the packing layer (102), and the separation unit (103) has a plurality of micropores. A collecting pipe (104) is arranged in the side wall of the spray tank (100), and the upper end of the collecting pipe (104) is flush with and connected to the upper surface of the separation unit (103), and the lower end of the collecting pipe (104) is connected to the liquid storage tank (200), and the liquid on the upper surface of the separation unit (103) flows into the liquid storage tank (200) through the collecting pipe (104).

2. The industrial waste gas treatment device according to claim 1, characterized in that: The separation unit (103) includes an upper pressing plate (105), a lower pressing plate (106), and a separation membrane (107), wherein the separation membrane (107) is sandwiched between the upper pressing plate (105) and the lower pressing plate (106).

3. An industrial waste gas treatment device according to claim 2, characterized in that: The upper pressing plate (105) and the lower pressing plate (106) are both spherical structures.

4. The industrial waste gas treatment device according to claim 2, characterized in that: The separation membrane (107) is a PET membrane, and the micropores on the separation membrane (107) are formed by heavy ion bombardment.

5. The industrial waste gas treatment device according to claim 2, characterized in that: The separation unit (103) is arranged obliquely inside the spray tank (100), and the upper end of the collecting pipe (104) is flush with the lowest position of the separation unit (103).

6. The industrial waste gas treatment device according to claim 1, characterized in that: The processing assembly further comprises a holding plate (101), wherein the holding plate (101) is fixedly arranged on the inner side of the spray tank (100), and the filler layer (102) is placed on the holding plate (101).

7. An industrial waste gas treatment device according to claim 6, characterized in that: The containing plate (101) is provided with a plurality of through holes.

8. The industrial waste gas treatment device according to claim 1, characterized in that: A filter plate is arranged inside the liquid storage tank (200), and an inlet of the liquid storage tank (200) and an inlet of the pressure pump (210) are respectively located on both sides of the filter plate.

9. The industrial waste gas treatment device according to claim 1, characterized in that: A conical air collecting hood (120) is provided on the top of the spray tank (100), and an air outlet pipe (130) is connected to the upper end of the air collecting hood (120).

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