Chemical atomization waste gas purification device

Abstract

The utility model provides a chemical atomization waste gas purification device. The chemical atomization waste gas purification device comprises a tank body, and a filler layer, a chemical agent atomization device and a liquid collection tank which are positioned in the tank body, wherein the liquid collecting tank is located below the filler layer, an atomizing chamber is formed between the liquid collecting tank and the filler layer, the chemical agent atomizing device is located in the atomizing chamber, and the chemical agent atomizing device is connected with an agent storage tank located outside the tank body through a dosing pipeline and used for atomizing chemical agents. The chemical agent atomization device is arranged below the packing layer, chemical agents are atomized into small molecule water mist, waste gas carries the chemical agent water mist to enter the packing layer together to be purified, a spraying device in a traditional waste gas purification device is replaced, and the device is simpler in structure, convenient to operate and low in cost. A large amount of circulating liquid and chemical agents do not need to be consumed, energy consumption and cost are greatly reduced, and meanwhile the purification efficiency of the waste gas is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental purification, and in particular relates to a chemical atomization waste gas purification device. Background Art

[0002] Traditional chemical waste gas purification devices are Figure 1 The chemical spray tower shown in the figure has a packing layer 01, a circulating liquid storage tank 02 located below the packing layer 01, a circulating liquid pump 03 and a spray device 04 arranged in the tower body. The circulating liquid pump 03 transports the circulating liquid in the circulating liquid storage tank 02 to the spray device 04, and evenly sprays the circulating liquid in the packing layer 01. The malodorous gas enters the gas distribution space at the bottom of the chemical spray tower from the gas collecting air duct 07, enters the packing layer 01 from the bottom of the packing layer 01 for purification, and the spray liquid is sprayed from the spray device 04 onto the packing. On the surface of the packing, the gas and liquid phases are fully in contact, generating After biochemical absorption and neutralization reaction, the purified gas is discharged through the gas collecting duct 08, and the circulating liquid finally flows back to the circulating liquid storage tank 02 at the bottom of the tower for recycling. The circulating liquid pump 03 transports the circulating liquid in the circulating liquid storage tank 02 to the spray device 04. A reagent supply pipe 06 is set on the pipeline path for replenishing fresh chemical agents. A water replenishment pipe 05 is also set in the chemical spray tower body for replenishing fresh circulating liquid. The purpose of removing waste gas is achieved through the combination of continuous circulation spraying of this chemical spray tower and chemical dosing device.

[0003] However, this traditional chemical waste gas purification device has a complex structure, consumes a large amount of circulating fluid and chemical agents, is energy-consuming and time-consuming, and has a low waste gas purification efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a chemical atomization exhaust gas purification device.

[0005] To achieve the above purpose, the solution adopted by the utility model is as follows:

[0006] The utility model provides a chemical atomization waste gas purification device, comprising a tank body and a packing layer located inside the tank body, a chemical agent atomization device and a liquid collecting tank; wherein the liquid collecting tank is located below the packing layer, an atomization chamber is formed between the liquid collecting tank and the packing layer, the chemical agent atomization device is located in the atomization chamber, and the chemical agent atomization device is connected to a medicine storage tank located outside the tank body through a medicine adding pipeline for atomizing the chemical agent.

[0007] Preferably, an air inlet and an air outlet are provided on the tank body, the air inlet is located at the position of the atomization chamber and close to the chemical agent atomization device, and the air outlet is located at the top of the tank body.

[0008] Preferably, the air inlet is located below the chemical agent atomization device.

[0009] Preferably, the chemical agent atomization device is in a flat plane shape and is fixed in the atomization chamber of the tank body perpendicular to the central axis of the tank body.

[0010] Preferably, the chemical agent atomization device comprises a plurality of annular atomization sheets arranged at intervals from large to small diameters, and the entire annular structure of each annular atomization sheet is covered with spray holes at equal intervals.

[0011] Preferably, the end section of the drug adding pipeline extends along the diameters of the plurality of annular atomizing sheets to the annular atomizing sheet with the largest diameter.

[0012] Preferably, the chemical agent atomization device atomizes the chemical agent in the atomization chamber by ultrasonic atomization.

[0013] Preferably, a dosing pump is also provided on the path of the dosing pipeline.

[0014] Preferably, a liquid level sensor is provided in the liquid collecting tank for sensing the liquid level of the liquid collected in the liquid collecting tank.

[0015] Preferably, a demister is provided at the air outlet.

[0016] Beneficial Effects

[0017] The utility model provides a chemical atomization exhaust gas purification device, which arranges a chemical agent atomization device below the packing layer to atomize the chemical agent into the form of small molecule water mist. The exhaust gas carries the chemical agent water mist into the packing layer for purification, thereby replacing the spray device in the traditional exhaust gas purification device. The device has a simpler structure and does not need to consume a large amount of circulating fluid and chemicals, which greatly saves energy consumption and cost, and also significantly improves the purification efficiency of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a traditional chemical spray tower mentioned in the background technology of the present utility model.

[0019] Figure 2 It is a schematic structural diagram of the chemical atomization waste gas purification device involved in the utility model.

[0020] Figure 3 The utility model is a schematic diagram of the three-dimensional structure of the tank body of the chemical atomization waste gas purification device.

[0021] Figure 4 It is a top view of the tank body of the chemical atomization exhaust gas purification device involved in the utility model.

[0022] Figure 5 It is a side view of the tank body of the chemical atomization exhaust gas purification device involved in the utility model.

[0023] Figure 6 for Figure 5 Middle AA section view.

[0024] Figure 7 It is a side view of the tank body of the chemical atomization exhaust gas purification device involved in the utility model from another direction.

[0025] Figure 8 for Figure 7 Middle BB section view.

[0026] Fig. 9 for Figure 7 Middle CC section view. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] To this end, the following solutions are proposed:

[0034] See also Figure 2-4 The utility model provides a chemical atomization waste gas purification device, comprising a tank body 1 and a packing layer 2 located inside the tank body 1, a chemical agent atomization device 3 and a liquid collecting tank 4, wherein the liquid collecting tank 4 is located below the packing layer 2, and an atomization chamber A is formed between the liquid collecting tank 4 and the packing layer 2, the chemical agent atomization device 3 is located in the atomization chamber A, and the chemical agent atomization device 3 is connected to a medicine storage tank 6 located outside the tank body 1 through a dosing pipeline 5, and the chemical agent atomization device 3 atomizes the chemical agent in the medicine storage tank 6 into the form of small molecule water mist in the atomization chamber A.

[0035] In the chemical atomization waste gas purification device of the present invention, an air inlet 11, an air outlet 12 and an atomization pipeline connection port 13 are provided on the tank body 1. The air inlet 11 is located in the atomization chamber A, near the chemical atomization device 3, the air outlet 12 is located at the top of the tank body 1, and the atomization pipeline connection port 13 is located at the position where the chemical atomization device 3 is fixed to the inner wall of the tank body 1, and is connected to the dosing pipeline 5. Figure 5 and Figure 6 It can be seen that as a more preferred embodiment, the air inlet 11 is located below the chemical agent atomization device 3, so that after the exhaust gas enters the atomization chamber A from the air inlet 11, it can first contact the chemical agent atomized by the chemical agent atomization device 3 during the upward process. Figure 3 , Figure 4 , Figure 8 and Fig. 9 It can be seen that, as a preferred embodiment, the air intake pipe located at the air intake port 11 is connected to the tank body 1 in a horizontal rotary cut structure.

[0036] As an embodiment of the utility model, the chemical agent atomization device 3 atomizes the chemical agent injected into the dosing pipeline 5 into small molecule water mist in the atomization chamber A in advance. After the exhaust gas enters the atomization chamber A from the air inlet 11, the exhaust gas carries the atomized chemical agent water mist in the atomization chamber A and enters the packing layer 2 from the bottom of the packing layer 2. On the surface of the packing, the odorous components in the exhaust gas undergo chemical absorption and neutralization reaction with the chemical agent, and condense on the surface of the packing to form droplets. The gas purified by the packing layer by layer rises from the channel formed by the gaps between the packing particles in the packing layer 2 and is finally discharged from the air outlet 12 on the top of the tank body 1. The droplets formed after the chemical neutralization reaction between the odorous components and the chemical agent flow down with the action of gravity and drip into the liquid collecting tank 4 located below the packing layer 2.

[0037] In some embodiments, a demister 10 (such as Figure 4 As shown), it is used to intercept part of the water mist of chemicals that may be carried in the gas after purification by the packing layer 2 and enter the next process, thereby avoiding the influence of the chemicals on the next process.

[0038] In some embodiments, in the tank body 1, at the bottom of the packing layer 2, a grid plate 14 for supporting the packing layer 2 is provided, and the waste gas carrying small molecule water mist of chemical agents passes upward through the grid plate 13 into the packing layer 2 for purification.

[0039] In the chemical atomization exhaust gas purification device of the utility model, Figure 5 , Figure 6 As shown, the chemical agent atomization device 3 is flat and fixed in the atomization chamber A of the tank body 1 perpendicular to the central axis of the tank body 1. In some embodiments, as Figure 7-9 As shown, the chemical agent atomization device 3 includes several annular atomization sheets 31 arranged at intervals from large to small diameters, and the entire annular structure of each annular atomization sheet 31 is covered with spray holes 311 at equal intervals, and the end section of the dosing pipeline 5 extends along the diameter of the several annular atomization sheets 31 to the annular atomization sheet with the largest diameter. In a more preferred embodiment, the chemical agent atomization device 3 atomizes the chemical agent in the atomization chamber A into a small molecule water mist by ultrasonic atomization. In addition, since the chemical agent atomization device 3 needs to continuously pass the chemical agent, in order to avoid the corrosive effect of the chemical agent, the chemical agent atomization device 3 can be designed to be integrated with the inner wall of the tank body 1 to avoid forming a connection gap with the inner wall of the tank body 1 and causing corrosion of the chemical agent.

[0040] In the chemical atomization exhaust gas purification device of the utility model, the chemical agent can be selected according to the properties of the pollution source gas. Generally speaking, for example, the malodorous gas of the urban sewage treatment plant mainly comes from the decomposition process of organic matter. Ammonia, hydrogen sulfide, methyl mercaptan and other malodorous substances are produced in the water inlet pump station, grille room, sand settling tank, primary settling tank, aeration tank, sludge concentration tank, digestion tank, dehydration room and other places. The main components of malodorous gas can be divided into three categories: sulfur-containing compounds (hydrogen sulfide, methyl mercaptan, methyl sulfide, etc.); nitrogen-containing compounds (ammonia, diamines, methyl indole, etc.); compounds composed of carbon, hydrogen, oxygen, etc. (lower alcohols, aldehydes, fatty acids, etc.). If the acidic gas such as hydrogen sulfide is the main component in the malodor source, the chemical agent can be selected as alkali solution; if the ammonia concentration in the malodor source is high, the chemical agent can be selected as dilute sulfuric acid; if the volatile organic components in the malodor source are mostly, the chemical agent can be selected as sodium hypochlorite solution or other oxidant products. In addition, the concentration of the chemical agent can be determined according to the concentration of the malodorous gas in the exhaust gas.

[0041] In the chemical atomization exhaust gas purification device of the utility model, the filler in the filler layer 2 is generally composed of particles formed by polyurethane foam, calcium silicate particles, columnar polyethylene plastic cotton, multi-faceted hollow plastic balls, plastic pall rings or bamboo charcoal. The surface of these particles can also be coated with a coating layer such as enzymes, microorganisms, etc. that promotes chemical reactions between chemical agents and odorous components in the exhaust gas.

[0042] In the chemical atomization exhaust gas purification device of the utility model, Figure 2 As shown, the chemical agent in the agent storage tank 6 can be quantitatively pumped into the chemical agent atomization device 3 through the dosing pump 7. In addition, a liquid level sensor (not shown in the figure) is provided in the liquid collecting tank 4, which is used to sense the liquid level of the liquid collected in the liquid collecting tank. A drain port 41 is provided on the side of the liquid collecting tank 4, and the drain port 41 is connected to the drain pipe 8. A drain valve 9 is provided on the path of the drain pipe 8. During the exhaust gas purification process, the liquid droplets that have undergone chemical reactions dripping from the packing layer 2 drip into the liquid collecting tank 4, which will cause the liquid level of the liquid collecting tank 4 to rise. The rise of the liquid level of the liquid collecting tank 4 will cause the compression of the atomization chamber A, affecting the atomization effect. Therefore, it is necessary to automatically open and close the drain valve 9 and the dosing pump 7 for the agent delivery in real time through the signal transmission of the liquid level sensor set in the liquid collecting tank 4, so as to ensure that the liquid level of the liquid collecting tank 4 remains roughly stable. Compared with the traditional exhaust gas purification device, this setting replaces the original spray device and does not require the consumption of a large amount of circulating fluid and chemicals. The metering of the delivered chemicals and the control of the discharged waste liquid are more accurate and precise, which greatly saves energy consumption and costs.

[0043] In terms of the purification efficiency of exhaust gas, the utility model atomizes the chemical agents into the form of small molecule water mist, and the exhaust gas carries these chemical agent water mist into the packing layer, and a chemical reaction occurs on the surface of the packing to remove the odorous components in the exhaust gas. Compared with the spraying method of the traditional exhaust gas purification device, the spraying method is to spray the liquid chemical agent on the surface of the packing, and then the chemical agent contacts the rising gas to produce a chemical reaction, while the chemical agent in the form of water mist is in closer contact with the odorous components in the exhaust gas, which can significantly improve the chemical reaction efficiency, thereby significantly improving the purification efficiency of the exhaust gas.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A chemical atomization exhaust gas purification device, characterized in that: The invention comprises a tank body and a packing layer located inside the tank body, a chemical agent atomization device and a liquid collecting tank; wherein the liquid collecting tank is located below the packing layer, an atomization chamber is formed between the liquid collecting tank and the packing layer, the chemical agent atomization device is located in the atomization chamber, and the chemical agent atomization device is connected to a medicine storage tank located outside the tank body through a medicine adding pipeline for atomization of chemical agents; an air inlet and an air outlet are provided on the tank body, the air inlet is located at the position of the atomization chamber, close to the chemical agent atomization device, and the air inlet is located at the position of the atomization chamber, close to the chemical agent atomization device. The gas outlet is located at the top of the tank body; the gas inlet is located below the chemical agent atomization device; the chemical agent atomization device is in a flat plane shape and is fixed in the atomization chamber of the tank body perpendicular to the central axis of the tank body; the chemical agent atomization device includes a plurality of annular atomization sheets arranged at intervals from large to small in diameter, and the entire annular structure of each annular atomization sheet is covered with spray holes at equal intervals, and the end section of the dosing pipeline extends along the diameters of the plurality of annular atomization sheets to the annular atomization sheet with the largest diameter.

2. The chemical atomization exhaust gas purification device according to claim 1, characterized in that: The chemical agent atomization device atomizes the chemical agent in the atomization chamber by ultrasonic atomization.

3. The chemical atomization exhaust gas purification device according to claim 1, characterized in that: A dosing pump is also provided on the path of the dosing pipeline.

4. The chemical atomization exhaust gas purification device according to claim 1, characterized in that: A liquid level sensor is provided in the liquid collecting tank for sensing the liquid level of the liquid collected in the liquid collecting tank.

5. The chemical atomization exhaust gas purification device according to claim 1, characterized in that: A demister is provided at the air outlet.

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