Waste gas treatment system

Abstract

The utility model discloses a waste gas treatment system and belongs to the technical field of waste gas treatment. The spray tower comprises a spray device, the spray device comprises a spray tower body and a circulating water tank, and the circulating water tank is communicated with a nozzle in the spray tower body through a spray pump and a spray main pipe; the water spraying direction of the nozzles is opposite to the circulation direction of waste gas in the spray tower body; the pesticide supply device comprises a pesticide dispensing barrel and a metering pump, and the metering pump pumps a pesticide in the pesticide dispensing barrel into the circulating water tank through a pipeline to form a spraying mixed solution; the inlet end of the demister is communicated with the gas outlet in the spray tower body, and the demister is used for carrying out water vapor removal treatment on the sprayed and purified gas, so that the water content of the gas entering back-end equipment is greatly reduced, and the phenomenon that the back-end equipment is damaged due to water vapor is avoided; and the service life of rear-end equipment can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to waste gas treatment technical field, more specifically, relate to a waste gas treatment system. BACKGROUND

[0002] Waste gas refers to the toxic and harmful gas discharged in the process of production and life. Especially in chemical plants, steel plants, pharmaceutical plants, and coking plants and oil refineries, the odor of the exhaust gas is large, which seriously pollutes the environment and affects human health.

[0003] As a kind of efficient waste gas treatment equipment, spray tower plays an increasingly important role in modern industrial production. Through countercurrent contact, spray tower can efficiently remove pollutants in waste gas and achieve waste gas purification treatment. At the same time, spray tower has the advantages of high treatment efficiency, wide application range, stable and reliable operation, simple and convenient maintenance, environmental protection and energy saving, etc., and is an ideal choice in the field of industrial waste gas treatment.

[0004] For example, in the patent CN214764401U, a waste gas spray tower equipment for waste gas treatment is disclosed. The application includes a support seat, a tower body is bolted on the top of the support seat, a collection box is bolted at the center of the bottom of the support seat, a fixed plate is bolted on the top of both sides of the inner cavity of the tower body, through holes are formed around the top of the fixed plate, and support columns are slidably connected on both sides of the top of the tower body. The utility model discloses a cooperation mode of conveying pipe, water outlet disc, connecting column, first gear and second gear, the rotation of the second gear can drive the whole rotating plate to rotate, so that the water outlet disc and the spray head can rotate to fully spray the waste gas in the tower body, and through the cooperation of the first activated carbon adsorption net, the waste gas after spraying and purification can be effectively adsorbed and filtered, so that the discharged waste gas can meet the qualified emission standard, and the problem of poor purification effect of traditional waste gas spray tower equipment is solved.

[0005] For example, in the patent CN221085086U, a circulating spray tower for organic waste gas treatment is disclosed. The application includes a spray tower body for waste gas treatment, a base is fixedly connected to the bottom end of the spray tower body, a water pump is arranged on the top of the base and located on one side of the spray tower body, a dust removal mechanism is arranged on the top of the base, the dust removal mechanism includes a dust removal box, the dust removal box is arranged on one side of the spray tower body, a first air inlet pipe is connected to one side of the dust removal box, and two rotating vanes are arranged inside the dust removal box and symmetrically distributed. The application provides a circulating spray tower for organic waste gas treatment, which solves the problem that the existing organic waste gas spray tower does not have a pretreatment device, which makes it inconvenient to remove particulate impurities in organic waste gas, and the particulate impurities in organic waste gas enter the interior of the spray tower body, which affects the treatment effect of the spray tower body on organic waste gas to some extent.

[0006] The above applications all relate to technical improvements of the spray tower system, but there is still room for optimization. For example, the gas after spraying carries a large amount of water vapor, which directly enters the downstream equipment, easily accelerating the damage of the equipment and causing the phenomenon of leakage, which does not meet the requirements of environmental protection inspection, etc. Practical new type content

[0007] 1. The problem to be solved

[0008] In view of at least some of the problems existing in the above prior art, the present utility model provides a waste gas treatment system, which aims to solve the problem that a large amount of water vapor is carried by the waste gas after being treated by the spray tower system, which easily accelerates the damage of the downstream equipment.

[0009] 2. Technical scheme

[0010] In order to solve the above problems, the technical scheme adopted by the present utility model is as follows:

[0011] The waste gas treatment system of the present utility model comprises a spraying device, wherein the spraying device comprises a spray tower body and a circulating water tank, the circulating water tank is connected in communication with a nozzle in the interior of the spray tower body through a spraying pump and a spraying main pipe; wherein the water spraying direction of the nozzle is opposite to the flow direction of the waste gas in the interior of the spray tower body.

[0012] The medicine supply device comprises a dispensing barrel and a metering pump, the metering pump pumps the medicine in the dispensing barrel into the circulating water tank through a pipeline to form a spraying mixed solution.

[0013] And a demister, the inlet end of the demister is connected in communication with the gas outlet on the spray tower body, and is used for water vapor treatment of the gas after being purified by spraying.

[0014] Further, a water collecting area is formed at the bottom of the spray tower body, the water collecting area is connected in communication with the circulating water tank through a pipeline, and is used for returning the spraying mixed solution after spraying to the circulating water tank.

[0015] Further, a pH meter is arranged in the circulating water tank, which is used for monitoring the acidity and alkalinity of the spraying mixed solution in the circulating water tank, so as to determine whether to supplement the medicine into the circulating water tank.

[0016] Further, the gas outlet of the spray tower body is arranged at the top of the spray tower body, and the gas inlet of the spray tower body is arranged close to the bottom; the nozzle is arranged at an upper position in the middle of the interior of the spray tower body, and the water spraying direction of the nozzle is downward.

[0017] Further, the spraying main pipe is connected with at least two spraying branch pipes, and the plurality of spraying branch pipes are distributed in an up-down manner; a plurality of nozzles are arranged on the spraying branch pipe, and a first filler layer is arranged below the nozzles on the spraying branch pipe.

[0018] Further, the second packing layer is arranged in the spray tower body near the top and between the nozzle and the gas outlet of the spray tower body.

[0019] Further, the first packing layer is provided with the Pall ring packing, and the second packing layer is provided with the foam packing, the fiber packing or the Pall ring packing.

[0020] Further, the gas outlet of the demister is connected with the UV photocatalytic equipment.

[0021] Further, the circulating water tank and the dosing barrel are both provided with the stirrer.

[0022] Further, the spray tower body is provided with the window and the inspection hole, wherein the window is arranged on the peripheral wall of the spray tower body, and the inspection hole is arranged on the top of the spray tower body.

[0023] 3, beneficial effects

[0024] Compared with the prior art, the utility model has the beneficial effects that:

[0025] (1) the utility model discloses a waste gas treatment system, which is communicated with a demister at the gas outlet of the spray tower body, the gas purified through spraying enters the demister, the mist droplets are captured by the demister blades and gathered to form water droplets, the water droplets fall to the bottom of the demister due to gravity and are collected and discharged through the bottom drain pipe, so that the water content in the gas entering the rear-end equipment is greatly reduced, thereby avoiding the phenomenon that the rear-end equipment is damaged due to water vapor, and the service life of the rear-end equipment is ensured.

[0026] (2) the utility model discloses a waste gas treatment system, the circulating water tank and the water collecting area at the bottom of the spray tower body are communicated with each other, so that the spraying mixed solution after spraying can be returned to the circulating water tank for recycling, so as to improve the use efficiency of the spraying mixed solution, and the PH meter is arranged in the circulating water tank, so as to monitor the acidity and alkalinity of the spraying mixed solution in the circulating water tank, when it is monitored that the spraying mixed solution cannot meet the demand, the metering pump is started to supplement the reagent into the circulating water tank, so as to improve the concentration of the reagent in the spraying mixed solution and ensure the spraying effect.

[0027] (3) the utility model discloses a waste gas treatment system, the nozzle adopts the reverse flow type spraying, so that the waste gas and the spraying mixed solution can be fully contacted, and the spraying effect is ensured, and the Pall ring packing is arranged below the nozzle, so as to further extend the residence time of the waste gas in the tower, increase the gas-liquid contact area, and also improve the spraying effect.

[0028] (4) The utility model discloses a waste gas treatment system, and the outlet of the demister is connected with UV photocatalytic equipment, and the organic matter after the decomposition of ozone under the irradiation of the ultraviolet lamp tube has very strong oxidizing capacity and is used for the last oxidation treatment of the residual pollutant factor in waste gas, and finally the waste gas is discharged in the form of low molecular compound, water, carbon dioxide and the like, to further improve the purification effect on waste gas. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of the waste gas treatment system of the utility model;

[0030] Figure 2 It is a structural enlarged schematic view in Figure 1

[0031] In the drawing: 1, spraying device;11, spraying tower body;12, circulating water tank;13, spraying pump;14, spraying main pipe;15, nozzle;16, spraying branch pipe;171, first filler layer;172, second filler layer;18, window;19, manhole;

[0032] 2, medicine supply device;21, medicine preparation barrel;22, metering pump;3, demister;4, UV photocatalytic equipment. DETAILED DESCRIPTION

[0033] In order to further understand the content of the utility model, the utility model is described in detail in combination with the drawings.

[0034] In the description of the utility model, it is explained that the orientation or position relation of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation of the utility model. The terms "first", "second", "third" are only for the description purpose, and cannot be understood as indicating or implying relative importance.

[0035] The utility model will be further described in combination with specific embodiments.

[0036] For example, Figure 1 ​As shown, the waste gas treatment system of the embodiment comprises a spraying device 1, a medicine supply device 2 and a demister 3. The spraying device 1 is used for spraying and removing waste of the waste gas to realize purification of the waste gas. The spraying device 1 comprises a spraying tower body 11 and a circulating water tank 12. The spraying tower body 11 is a hollow cylindrical structure as a whole, and is provided with a gas inlet for the waste gas to enter and a gas outlet for the purified gas to be discharged. The spraying tower body 11 is provided with a nozzle 15. The circulating water tank 12 is located at one side of the spraying tower body 11. The circulating water tank 12 is connected with the nozzle 15 in the spraying tower body 11 through a spraying pump 13 and a spraying main pipe 14.

[0037] The medicine supply device 2 is used for supplying the medicine used in the spraying operation to the circulating water tank 12. The medicine supply device 2 comprises a medicine preparation barrel 21 and a metering pump 22. The metering pump 22 pumps the medicine in the medicine preparation barrel 21 into the circulating water tank 12 through a pipeline to form a spraying mixed liquid.

[0038] The demister 3 is used for removing water vapor from the gas purified by spraying to reduce the influence on the downstream equipment. The inlet of the demister 3 is connected with the gas outlet of the spraying tower body 11. After the purified gas is separated into gas and liquid by the demister 3, the gas enters the downstream equipment, and the liquid is collected and discharged through a drain pipe at the bottom of the demister 3.

[0039] The waste gas treatment system of the embodiment is used for removing water vapor from the gas purified by spraying to reduce the influence on the downstream equipment. The demister 3 is used for removing water vapor from the gas purified by spraying to reduce the influence on the downstream equipment. The inlet of the demister 3 is connected with the gas outlet of the spraying tower body 11. After the purified gas is separated into gas and liquid by the demister 3, the gas enters the downstream equipment, and the liquid is collected and discharged through a drain pipe at the bottom of the demister 3.

[0040] Specifically, in the embodiment, the gas outlet of the spraying tower body 11 is arranged at the top of the spraying tower body 11, and the gas inlet of the spraying tower body 11 is arranged near the bottom. The nozzle 15 is arranged at an upper middle position in the spraying tower body 11, and the water spraying direction of the nozzle 15 is downward. In this way, the water spraying direction of the nozzle 15 is opposite to the flow direction of the waste gas in the spraying tower body 11, so that the waste gas and the spraying mixed liquid can be fully contacted, and the spraying effect is ensured.

[0041] Meanwhile, the spray tower body 11 is provided with a viewing window 18 and an inspection hole 19. The viewing window 18 is arranged on the outer peripheral wall of the spray tower body 11 to facilitate observation of the working condition inside the spray tower body 11. The inspection hole 19 is arranged on the top of the spray tower body 11 to facilitate maintenance and replacement of the components inside the spray tower body 11. In addition, a stirrer can also be arranged in the circulating water tank 12 and the dosing barrel 21 to ensure uniform mixing of the medicament.

[0042] To further improve the spraying effect of the spray mixture on the exhaust gas, in the embodiment, the spray main pipe 14 is connected with at least two spray branch pipes 16, and a plurality of nozzles 15 are arranged on each spray branch pipe 16. Meanwhile, the two spray branch pipes 16 are arranged in an up-down distribution to form multi-level spraying. In addition, a first filler layer 171 is arranged below the nozzles 15 on the spray branch pipe 16, and the first filler layer 171 can be filled with Pall ring fillers. This design makes the exhaust gas pass through the Pall ring fillers during the rising process, thereby extending the residence time of the exhaust gas in the tower, increasing the gas-liquid contact area, and thus being beneficial to improving the spraying effect.

[0043] In addition, a second filler layer 172 is arranged between the nozzles 15 (the uppermost layer) and the gas outlet of the spray tower body 11 in the spray tower body 11. The second filler layer 172 can be filled with water-absorbing fillers, such as foam fillers, fiber fillers, etc. The water vapor in the gas after being purified by spraying can be adsorbed once before being discharged from the spray tower body 11, so as to reduce the water content in the gas. Of course, the second filler layer 172 can also be provided with Pall ring fillers.

[0044] As another embodiment of the present embodiment, a water collecting area is formed at the bottom of the spray tower body 11, which is used for collecting the spray mixture after spraying. Meanwhile, the water collecting area is connected with the circulating water tank 12 through a pipeline, so that the spray mixture after spraying can be returned to the circulating water tank 12 for recycling, thereby improving the use efficiency of the spray mixture.

[0045] Since the content of the medicament in the spray mixture will decrease after spraying, when the content of the medicament in the spray mixture decreases to a certain level, it will directly affect the spraying effect in the later stage. Therefore, in the present embodiment, a pH meter is arranged in the circulating water tank 12 to monitor the acidity and alkalinity of the spray mixture in the circulating water tank 12, so as to obtain the content of the medicament in the spray mixture. When it is monitored that the spray mixture cannot meet the requirements, at this time, the metering pump 22 is started to supplement the medicament into the circulating water tank 12, so as to increase the concentration of the medicament in the spray mixture and ensure the spraying effect.

[0046] In addition, it should be noted that in the present embodiment, it is not possible to continuously recycle the spray mixture. According to the SOP, the circulating water tank needs to be replaced periodically. That is, after a certain number of cycles of recycling the spray mixture, it needs to be replaced.

[0047] The exhaust gas treatment system of the present embodiment is provided with a UV photocatalytic device 4 connected to the outlet of the mist eliminator 3 to further improve the purification effect on the exhaust gas. The UV photocatalytic device uses the strong oxidizing ability of the organic matter after the decomposition of ozone under the irradiation of a UV lamp tube to perform the final oxidation treatment on the residual pollutants in the exhaust gas, and finally the exhaust gas is mainly discharged in the form of low molecular compounds, water, carbon dioxide, etc.

[0048] The above describes the present application and its embodiments in a schematic manner, and the description is not limiting. The embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the present application, without departing from the spirit of the present application, similar structural modes and embodiments can be designed without creativity, which should all belong to the protection scope of the present application.

Claims

1. An exhaust gas treatment system, characterized in that: include A spray device (1), the spray device (1) comprising a spray tower body (11) and a circulating water tank (12), the circulating water tank (12) being connected to a nozzle (15) inside the spray tower body (11) via a spray pump (13) and a spray main pipe (14); wherein the water spraying direction of the nozzle (15) is opposite to the flow direction of the exhaust gas in the spray tower body (11); A medicine supply device (2), the medicine supply device (2) comprising a medicine dispensing barrel (21) and a metering pump (22), wherein the metering pump (22) pumps the medicine in the medicine dispensing barrel (21) into the circulating water tank (12) through a pipeline to form a spray mixture; and a demister (3), the inlet end of which is connected to the gas outlet on the spray tower body (11), and is used to remove water vapor from the gas after spray purification; wherein, The spray main pipe (14) is connected to at least two spray branch pipes (16), and the multiple spray branch pipes (16) are distributed in an upper and lower manner; the spray branch pipes (16) are provided with multiple nozzles (15), and a first filler layer (171) is provided below the nozzles (15) on the spray branch pipes (16); A second packing layer (172) is provided near the top of the spray tower body (11), and the second packing layer (172) is located between the nozzle (15) and the air outlet of the spray tower body (11); The first packing layer (171) is provided with ball ring packing; the second packing layer (172) is provided with foam packing or fiber packing.

2. The exhaust gas treatment system according to claim 1, characterized in that: A water collection area is formed at the bottom of the spray tower body (11), and the water collection area is connected to the circulating water tank (12) through a pipeline, and is used to return the spray mixed liquid after spraying to the circulating water tank (12).

3. The exhaust gas treatment system according to claim 2, characterized in that: The circulating water tank (12) is provided with a pH meter for monitoring the pH value of the spray mixture in the circulating water tank (12) to determine whether to add the reagent to the circulating water tank (12).

4. The exhaust gas treatment system according to claim 3, characterized in that: The air outlet of the spray tower body (11) is arranged at the top of the spray tower body (11), and the air inlet of the spray tower body (11) is arranged near the bottom; the nozzle (15) is arranged at an upper middle position inside the spray tower body (11), and the water spraying direction of the nozzle (15) is downward.

5. An exhaust gas treatment system according to any one of claims 1 to 4, characterized in that: The air outlet of the demister (3) is connected to a UV photocatalytic device (4).

6. The exhaust gas treatment system according to claim 5, characterized in that: Agitators are provided in the circulating water tank (12) and the medicine dispensing barrel (21).

7. The exhaust gas treatment system according to claim 5, characterized in that: The spray tower body (11) is provided with a viewing window (18) and an inspection hole (19); wherein the viewing window (18) is provided on the outer peripheral wall of the spray tower body (11), and the inspection hole (19) is provided on the top of the spray tower body (11).

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