Industrial tail gas treatment device

Abstract

The utility model provides an industrial tail gas treatment device. The industrial tail gas treatment device comprises a tower body, the tower body is sequentially provided with a gas inlet section, a first filler section, a spraying section, a second filler section, a demisting section and a gas outlet from bottom to top; a spraying device is arranged in the spraying section; the spraying device is connected with an alkali liquor tank through an alkali liquor conveying pipe; the spraying device comprises a rotating joint, a rotating chamber, a rotating cover and a distribution pool which are sequentially arranged from top to bottom; and an ultrasonic nebulizer is arranged in the distribution pool. The industrial tail gas treatment device disclosed by the utility model is reasonable in internal design, realizes atomizing rotational flow tangential circle arrangement through the spraying device with a specific structure, greatly improves the desulfurization and denitrification effects, and is low in treatment cost, remarkable in environmental protection benefit and suitable for wide-range popularization and application.

Description

TECHNICAL FIELD

[0001] The utility model relates to exhaust treatment device technical field especially relates to an industrial tail gas treatment device. BACKGROUND

[0002] In recent years, with the continuous development of science and technology, the resulting environmental problems cannot be ignored. Among them, nitrogen oxide, sulfur dioxide and other tail gas emissions are one of the important reasons for air pollution.

[0003] The current management methods mainly include catalytic reduction technology, selective catalytic reduction technology, adsorption removal technology, introduction of regeneration technology, etc. However, these technologies still have some problems, such as high cost, low efficiency, complex operation process, etc.

[0004] CN118987930A discloses a desulfurization and denitrification dust removal system, comprising: a denitrification reactor, a desulfurization tower, a dust removal device, a chimney, a waste liquid treatment tank and an alkali tank. The denitrification reactor improves the denitrification efficiency and reduces the cost; a plurality of curved flue gas passages are arranged in the filler layer, which increases the distance of flue gas passing through the filler layer, prolongs the contact time of flue gas and filler layer, and improves the absorption effect of flue gas by the filler layer, thereby improving the desulfurization effect of the filler layer on flue gas; a spraying device is also provided for blowing light dust to one side of the light dust outlet, and heavy dust cannot be blown up by the spraying device due to its own weight, and falls naturally into the heavy dust outlet side, which can realize the separation of light dust and heavy dust; the desulfurization tower can desulfurize flue gas multiple times, improve the desulfurization efficiency of the system, and also can remove mist from the desulfurized flue gas, thereby reducing the water content of flue gas at the chimney outlet.

[0005] CN214075898U discloses an absorption cabin for skid-mounted desulfurization and denitrification integrated complete equipment, comprising a control unit, a cabin, a circulating pump and an alkali liquid storage tank. The cabin is arranged horizontally and has an air inlet and an air outlet. A liquid leakage partition is arranged in the cabin, which divides the space in the cabin into an upper space and a lower space. A portal frame, a spoiler and a filler layer are arranged in the upper space, and the portal frame is provided with a plurality of spray heads. A circulating water tank is arranged in the lower space. The circulating pump has an inlet and an outlet, and the outlet is connected with the spray heads. The circulating water tank and the alkali liquid storage tank are connected with the inlet through pipelines. The absorption cabin adopts a horizontal structure and can be applied to skid-mounted desulfurization and denitrification integrated dust removal device, which is convenient to assemble, disassemble and move, so it is more flexible to use, and the internal structure is arranged reasonably, so the treatment efficiency of flue gas is high and the use effect is good.

[0006] CN210138593U discloses an environment-friendly spraying device, which comprises a spraying tower, a filler layer, a wire mesh demister and a liquid removal plate. The filler layer is arranged in the middle of the spraying tower, the wire mesh demister is arranged above the filler layer, and the liquid removal plate is arranged above the wire mesh demister. The filler layer comprises a filler plate and a spraying head, and the spraying head is arranged above the filler plate. The filler plate is filled with structured packing. The bottom of the spraying tower is provided with a lye tank and a main air pipe, one end of the main air pipe is connected to the lye tank, and an alkali adding device is arranged outside the lye tank. A PH detector and a booster pump are arranged in the lye tank, the PH detector is connected to the booster pump, and the booster pump is connected to the spraying head. A condenser is arranged outside the spraying tower. The device can effectively remove the mist entrained in the gas, avoid corrosion of the components in the spraying device due to long-term exposure to a humid environment, improve the safety performance of the spraying device, reduce the maintenance cost, and enable the spraying device to operate for a long period of time.

[0007] However, the above-mentioned device using lye and filler for desulfurization and denitrification still has the problem that the droplet size of the lye generated by spraying is large, and the reaction effect with the waste gas is poor. Practical new type content

[0008] In view of the problems in the prior art, the utility model provides an industrial tail gas treatment device, wherein the spraying device comprises a rotary joint, a rotating chamber, a rotating cover and a distribution pool arranged in sequence from top to bottom, and an ultrasonic atomizer is arranged in the distribution pool. By using the atomizing cyclone tangential arrangement technology, a spraying cyclone field is formed in the tower body, so that the industrial tail gas and the lye are fully mass transfer mixed. Moreover, under the action of the ultrasonic atomizer, the particle size of the lye droplets is significantly reduced, so that the lye and the industrial tail gas are fully contacted and reacted, the desulfurization and denitrification capacity is greatly improved, and the industrial tail gas treatment cost is reduced.

[0009] To achieve this purpose, the utility model adopts the following technical scheme:

[0010] The utility model provides an industrial tail gas treatment device, the industrial tail gas treatment device includes the tower body, the tower body from top to bottom sequentially is provided with the air inlet section, first packing section, spraying section, second packing section, demisting section and gas outlet,

[0011] The spraying section is provided with a spraying device, and the spraying device is connected with a lye tank through a lye conveying pipe.

[0012] The spraying device comprises a rotary joint, a rotating chamber, a rotating cover and a distribution pool arranged in sequence from top to bottom, and an ultrasonic atomizer is arranged in the distribution pool.

[0013] The industrial exhaust gas treatment device of this invention features packing sections at both the upper and lower parts of the spray section. Under the reaction force of the water flow, the alkaline solution drives the rotating chamber and rotating cover to rotate, uniformly entering the distribution tank and flowing downwards to the packing. This allows the industrial exhaust gas to react with the alkaline solution under the action of the packing, achieving the treatment of the industrial exhaust gas. Simultaneously, the alkaline solution is atomized by an ultrasonic atomizer in the distribution tank, reducing the particle size of the sprayed alkaline solution from the traditional 1500-3000μm to 50-80μm, forming a cloud-like mist. This increases the surface area of ​​contact between the alkaline solution and the exhaust gas, making the chemical reaction between them more complete and rapid. The atomized alkaline solution and the industrial exhaust gas from the inlet section are evenly distributed upwards to the second packing section, where the industrial exhaust gas reacts with the alkaline solution again, significantly improving the efficiency of desulfurization and denitrification of the industrial exhaust gas. The uppermost part of the tower body of this invention is a demisting section, which removes alkaline droplets entrained in the treated gas, preventing them from being discharged with the purified gas and ensuring the quality of the emitted gas.

[0014] The first packing section, spraying section and second packing section of this utility model not only carry out two-phase contact between alkali solution and industrial tail gas, but also carry out heat and mass transfer processes. The fullness and stability of this process can be ensured by controlling the empty tower flow rate and storage time.

[0015] The reaction equations for the main chemical reactions occurring inside the tower body described in this invention are as follows:

[0016] 2NO2+2NaOH=NaNO3+NaNO2+H2O.

[0017] Preferably, an air intake pipe is provided on one side of the air intake section.

[0018] Preferably, the air intake pipe is connected to the fan.

[0019] Preferably, the alkali delivery pipe is equipped with a delivery pump.

[0020] Preferably, the alkali tank is connected in sequence to a rotary joint and an outlet pipe.

[0021] Preferably, the outlet of the outlet pipe is tangential, so that the reaction force of the alkaline solution sprayed from the outlet pipe can drive the rotating cover and rotating chamber to rotate, thereby achieving uniform distribution of the alkaline solution in the distribution tank.

[0022] Preferably, the outflow pipe is connected to the rotating chamber.

[0023] Preferably, the upper part of the rotating chamber is provided with an outlet slit. The alkaline solution atomized by the ultrasonic atomizer is discharged through the outlet slit. Combined with the rotation of the rotating chamber and the rising airflow of the tower, the atomized alkaline solution rises to the second packing section. Under the catalytic action of the packing, it fully reacts with the industrial exhaust gas to achieve desulfurization and denitrification treatment of the industrial exhaust gas.

[0024] Preferably, the bottom of the distribution tank is provided with a distribution hole, and the alkaline solution flowing out of the outlet pipe flows into the first packing section through the distribution hole.

[0025] Preferably, the middle part of the distribution pool is provided with an inner enclosure and an outer enclosure from the inside to the outside.

[0026] Preferably, the bottoms of the inner and outer enclosures are connected by a channel.

[0027] Preferably, the ultrasonic atomizer is installed inside the inner enclosure, so that part of the alkaline solution flowing out from the outlet pipe enters the outer and inner enclosures through the channel, and is then atomized by the ultrasonic atomizer installed inside the inner enclosure.

[0028] Preferably, the rotating cover is disposed on the outer perimeter.

[0029] Preferably, the rotating cover is in communication with the rotating chamber.

[0030] Preferably, a demister is provided in the demister section.

[0031] The method of using the industrial exhaust gas treatment device described in this utility model includes:

[0032] Industrial exhaust gas enters the inlet section of the tower through a fan and moves upward. Simultaneously, a pump delivers alkali solution from the alkali tank to the alkali solution delivery pipe in the spray section. After passing through a rotary joint, the alkali solution is sprayed out from the outlet pipe. Under the reaction force of the water flow, the alkali solution drives the rotating chamber and rotating cover to rotate and enter the distribution tank. It then flows down through the distribution hole to the first packing section, where the industrial exhaust gas reacts with the alkali solution on the packing. At the same time, some of the alkali solution in the distribution tank enters the outer and inner baffles through the channel, where it is atomized by the ultrasonic atomizer. Then, under the action of the airflow between the inner and outer baffles, it rises and is discharged through the outlet slot. Combined with the rotation of the rotating chamber and the rising airflow in the tower, the atomized water mist rises to the second packing section. The packing increases the water mist path and allows it to fully react with the industrial exhaust gas. Finally, the treated gas enters the demisting section, is demisted by the demister, and is discharged from the outlet.

[0033] Compared with the prior art, the present invention has at least the following beneficial effects:

[0034] (1) The industrial exhaust gas treatment device provided by this utility model atomizes the alkaline solution through an ultrasonic atomizer, which greatly reduces the particle size of the sprayed liquid and increases the surface area of ​​contact between the alkaline solution and the exhaust gas, making the chemical reaction between the two more complete and rapid, and improving the reaction efficiency.

[0035] (2) The internal design of the industrial exhaust gas treatment device provided by this utility model is reasonable. By utilizing the design of the rotating chamber and the outlet slit, it is ensured that the atomized water mist can be evenly distributed in the tower body and fully mixed with the gas during the rising process, which improves the utilization efficiency of the alkali solution and enhances the desulfurization and denitrification capabilities.

[0036] (3) The industrial exhaust gas treatment device provided by this utility model adopts an integrated design, which integrates multiple functional components, such as rotary joints and ultrasonic atomizers, which simplifies the operation process and facilitates daily maintenance.

[0037] (4) In the spray section and packing section of the industrial exhaust gas treatment device provided by this utility model, the two-phase contact process is accompanied by the exchange of heat and mass transfer. By controlling the empty tower flow rate and storage time, the sufficiency and stability of this process are ensured, which helps to improve the overall treatment efficiency.

[0038] (5) The uppermost demisting section of the industrial exhaust gas treatment device provided by this utility model effectively removes the absorbent liquid droplets entrained in the gas, preventing them from being discharged with the purified gas, ensuring the quality of the emitted gas, and achieving significant environmental benefits.

[0039] (6) Compared with the traditional multi-layer spray structure, the industrial exhaust gas treatment device provided by this utility model simplifies the operation process and reduces the complexity of the equipment. At the same time, due to the improved reaction efficiency, it also indirectly reduces the amount of chemicals required, thereby reducing the overall cost of industrial exhaust gas treatment. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the industrial exhaust gas treatment device in a specific embodiment of this utility model.

[0041] Figure 2 This is a schematic diagram of the spraying device in a specific embodiment of this utility model.

[0042] Figure 3 This is an exploded view of the spraying device in a specific embodiment of this utility model.

[0043] Figure 4 This is a side view of the spraying device in a specific embodiment of this utility model.

[0044] Figure 5 This is a cross-sectional view (AA) of the spraying device in a specific embodiment of this utility model.

[0045] In the diagram: 1-Inlet section; 2-First packing section; 3-Spray section; 4-Second packing section; 5-Demisting section; 6-Outlet; 7-Alkali tank; 8-Inlet pipe; 9-Fan; 10-Transfer pump; 11-Demister; 12-Rotary joint; 13-Rotating chamber; 14-Rotating cover; 15-Distribution tank; 16-Ultrasonic atomizer; 17-Alkali delivery pipe; 18-Outlet pipe; 19-Outlet slit; 20-Distribution hole; 21-Inner enclosure; 22-Outer enclosure; 23-Channel. Detailed Implementation

[0046] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0047] The present invention will now be described in further detail. However, the examples described below are merely simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be determined by the claims.

[0048] It should be understood that in the description of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0049] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] Those skilled in the art should understand that this utility model necessarily includes the necessary pipelines, conventional valves and general pump equipment for achieving complete process, but the above content is not the main utility model point of this utility model. Those skilled in the art can add layouts based on process flow and equipment structure selection. This utility model does not make any special requirements or specific limitations in this regard.

[0051] As a specific embodiment of this utility model, an industrial exhaust gas treatment device is provided, the structural schematic diagram of which is shown below. Figure 1 As shown.

[0052] The industrial exhaust gas treatment device includes a tower body; the tower body is provided with an air inlet section 1, a first packing section 2, a spray section 3, a second packing section 4, a demisting section 5 and an air outlet 6 from bottom to top;

[0053] The spray section 3 is equipped with a spray device, the structural diagram of which is shown below. Figure 2 As shown, its exploded structural diagram is as follows: Figure 3 As shown, its side view is as follows Figure 4 As shown, its AA cross-sectional view is as follows Figure 5 As shown.

[0054] The spraying device is connected to the alkali tank 7 via the alkali delivery pipe 17.

[0055] The spraying device includes a rotary joint 12, a rotating chamber 13, a rotating cover 14 and a distribution pool 15 arranged sequentially from top to bottom; an ultrasonic atomizer 16 is provided in the distribution pool 15.

[0056] An air intake pipe 8 is provided on one side of the air intake section 1; the air intake pipe 8 is connected to the fan 9.

[0057] A delivery pump 10 is installed on the alkali delivery pipe 17.

[0058] The alkali tank 7 is connected in sequence to the rotary joint 12 and the outlet pipe 18.

[0059] The outlet of the outflow pipe 18 is tangential. The outflow pipe 18 is connected to the rotating chamber 13.

[0060] An outflow slit 19 is provided on the upper part of the rotating chamber 13.

[0061] The bottom of the distribution pool 15 is provided with a distribution hole 20.

[0062] The distribution pool 15 is provided with an inner enclosure 21 and an outer enclosure 22 arranged sequentially from the inside to the outside in the middle; the bottoms of the inner enclosure 21 and the outer enclosure 22 are connected by a channel 23.

[0063] The ultrasonic atomizer 16 is installed inside the inner enclosure 21.

[0064] The rotating cover 14 is mounted on the outer perimeter 22. The rotating cover 14 is connected to the rotating chamber 13.

[0065] A demister 11 is installed in the demister section 5.

[0066] As a specific embodiment of this utility model, a method for using the above-mentioned industrial exhaust gas treatment device is also provided, including the following steps:

[0067] Industrial exhaust gas enters the inlet section 1 of the tower body through the fan 9 and inlet pipe 8 and moves upward. Simultaneously, the delivery pump 10 delivers the alkali solution from the alkali tank 7 to the alkali solution delivery pipe 17 in the spray section 3. The alkali solution passes through the rotary joint 12 and is sprayed out from the outlet pipe 18. Under the reaction force of the water flow, the alkali solution drives the rotating chamber 13 and rotating cover 14 to rotate and enter the distribution tank 15. It then flows down through the distribution hole 20 to the first packing section 2, where the industrial exhaust gas reacts with the alkali solution on the packing. Meanwhile, within the distribution tank 15… Part of the alkaline solution enters the outer baffle 22 and inner baffle 21 through channel 23, and is atomized by the ultrasonic atomizer 16. Then, under the action of the airflow between the inner baffle 21 and the outer baffle 22, it rises and is discharged through the outlet slit 19. Combined with the rotation of the rotating chamber 13 and the rising airflow in the tower, the atomized water mist rises to the second packing section 4. The packing increases the water mist path and reacts fully with the industrial exhaust gas. Finally, the treated gas enters the demisting section 5, is demisted by the demister 11, and is discharged from the outlet 6.

[0068] In summary, the industrial exhaust gas treatment device provided by this utility model has a reasonable internal design, strong desulfurization and denitrification capabilities, high reaction efficiency, low treatment cost, and significant environmental benefits, making it suitable for widespread application.

[0069] The applicant declares that the detailed structural features of this utility model are illustrated through the above embodiments, but this utility model is not limited to the above detailed structural features, that is, it does not mean that this utility model must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions of selected components, additions of auxiliary components, and selection of specific methods, etc., all fall within the protection and disclosure scope of this utility model.

[0070] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

Claims

1. An industrial exhaust gas treatment device, characterized in that, The industrial exhaust gas treatment device includes a tower body; the tower body is provided with an air inlet section, a first packing section, a spray section, a second packing section, a demisting section and an air outlet from bottom to top; The spraying section is equipped with a spraying device; the spraying device is connected to the alkali tank via an alkali delivery pipe. The spraying device includes a rotary joint, a rotating chamber, a rotating cover, and a distribution tank arranged sequentially from top to bottom; an ultrasonic atomizer is installed in the distribution tank.

2. The industrial exhaust gas treatment device according to claim 1, characterized in that, An air intake pipe is provided on one side of the air intake section; The air intake pipe is connected to the fan.

3. The industrial exhaust gas treatment device according to claim 1, characterized in that, A delivery pump is installed on the alkali delivery pipe.

4. The industrial exhaust gas treatment device according to claim 1, characterized in that, The alkali tank is connected in sequence to a rotary joint and an outlet pipe.

5. The industrial exhaust gas treatment device according to claim 4, characterized in that, The outlet of the outflow pipe is in the tangential direction; The outflow pipe is connected to the rotating chamber.

6. The industrial exhaust gas treatment device according to claim 1, characterized in that, An outflow slit is provided at the top of the rotating chamber.

7. The industrial exhaust gas treatment device according to claim 1, characterized in that, The bottom of the distribution pool is provided with a distribution hole.

8. The industrial exhaust gas treatment device according to claim 1, characterized in that, The middle part of the distribution pool is provided with an inner enclosure and an outer enclosure from the inside out; The bottoms of the inner and outer enclosures are connected by a channel.

9. The industrial exhaust gas treatment device according to claim 1, characterized in that, The ultrasonic atomizer is installed inside the inner enclosure. The rotating cover is mounted on the outer perimeter; The rotating cover is connected to the rotating chamber.

10. The industrial exhaust gas treatment device according to claim 1, characterized in that, A demister is installed in the demisting section.

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