Tail gas treatment device and working method

Abstract

The invention provides a tail gas treatment device and a working method.The tail gas treatment device comprises a shell, a flow dividing device and at least one purging opening, the shell is provided with a cavity, a gas inlet and a gas outlet, the gas inlet and the gas outlet are communicated with the cavity, the flow dividing device is arranged in the cavity and fixedly connected with the gas inlet, and the flow dividing device is provided with a plurality of vent holes; the purging opening penetrates through the shell and is arranged in the direction perpendicular to the air inlet and facing the air outlet and externally tangent to the shell wall of the shell. According to the tail gas treatment device, the flow dividing device is arranged at the air inlet, tail gas is dispersed, the contact area between the tail gas and a tail gas treatment agent is increased, the tail gas treatment effect is improved, meanwhile, blowing gas is continuously introduced into the cavity of the tail gas treatment device through the blowing opening, gas circulation is formed in the cavity, and the tail gas treatment effect is improved. Sufficient contact between the tail gas and the tail gas treatment agent is enhanced, and the tail gas treatment effect is further improved.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas treatment technology, and in particular to an exhaust gas treatment device and its working method. Background Technology

[0002] In the industrial manufacturing sector, especially in semiconductor processing, the production process often generates a large amount of industrial exhaust gas. Some of this exhaust gas has excessive moisture content or contains corrosive gases such as acids and alkalis. If it is not treated before being emitted, it can cause corrosion and leakage in the emission pipes, releasing toxic and harmful gases that seriously threaten the personal safety of workers. Summary of the Invention

[0003] The purpose of this application is to provide an exhaust gas treatment device and working method, which can pre-treat exhaust gases generated during industrial processing to reduce their impact on exhaust pipes.

[0004] To achieve the above objectives, in a first aspect, this application provides an exhaust gas treatment device, including a housing, a diversion device, and at least one purge port. The housing has a cavity and an air inlet and an exhaust outlet communicating with the cavity. The cavity is used to contain an exhaust gas treatment agent. The diversion device is disposed inside the cavity and fixedly connected to the air inlet. The diversion device has a plurality of vent holes for dispersing the exhaust gas introduced through the air inlet. The purge port penetrates the housing and is disposed along a direction perpendicular to the air inlet and toward the exhaust outlet and tangential to the housing wall. The purge port is used to introduce purge gas into the cavity to form a gas circulation within the cavity.

[0005] Optionally, the diversion device includes a housing with an opening at one end, the opening of which faces the air inlet and is fixedly connected to the air inlet.

[0006] Optionally, the diversion device includes a pipe with openings at both ends, one end of the pipe being fixedly connected to the air inlet and the other end being fixedly connected to the exhaust outlet; the cross-sectional area of ​​the pipe gradually decreases in the direction away from the air inlet.

[0007] Optionally, the outer casing is a variable diameter pipe body, which is divided into a first section, a second section and a third section in sequence along the direction from the air inlet to the exhaust port. The diameter of the second section is larger than the diameter of the first section and the diameter of the third section. The diameter of the first section and the diameter of the third section gradually increase along the direction from the second section.

[0008] Optionally, the number of purge ports is set to two, and the two purge ports are symmetrically arranged along the direction axis from the air inlet to the exhaust port.

[0009] Optionally, the purge gas includes compressed air or an inert gas; and / or, the purge gas flow rate is, for example, 15 to 25 liters per minute.

[0010] Optionally, the exhaust gas treatment agent includes one of calcium chloride, activated carbon, alkaline absorbent, and acidic absorbent.

[0011] Optionally, the exhaust gas treatment device further includes a plurality of drain outlets penetrating the housing, the drain outlets being used to discharge liquid generated during the exhaust gas treatment process.

[0012] Optionally, the exhaust gas treatment device further includes several feed ports penetrating the outer casing, the feed ports being used to add the exhaust gas treatment agent into the cavity.

[0013] Compared with the prior art, the exhaust gas treatment device provided by the present invention has the following advantages:

[0014] First, this exhaust gas treatment device is equipped with a diversion device at the air inlet. After the exhaust gas to be treated enters the exhaust gas treatment device through the air inlet, it is dispersed by the diversion device, which can increase the contact area between the exhaust gas and the exhaust gas treatment agent and improve the exhaust gas treatment effect.

[0015] Secondly, this exhaust gas treatment device is equipped with a purge port, through which purge gas is introduced into the cavity of the exhaust gas treatment device, forming a gas circulation in the cavity, which enhances the full contact between the exhaust gas and the exhaust gas treatment agent, improves the exhaust gas treatment effect, can also dilute the exhaust gas, further reduce the corrosive impact of the treated exhaust gas on the subsequent exhaust pipe, and can also reduce the risk of blockage of the vent of the diversion device, ensuring the long-term operation of the exhaust gas treatment device.

[0016] Third, by setting the diversion device to a structure including a pipe with openings at both ends, and connecting the openings at both ends of the pipe to the air inlet and exhaust outlet of the exhaust gas treatment device respectively, it is beneficial to reduce the impact on the negative pressure of the plant during the actual application of connecting this device to the plant's exhaust pipeline, thus giving the device better compatibility and practical value.

[0017] Secondly, this application also provides a method for operating an exhaust gas treatment device, comprising the following steps:

[0018] A tail gas treatment device is provided, comprising a housing, a diversion device, and a purge port. The housing has a cavity and an air inlet and an exhaust port communicating with the cavity. The diversion device is disposed inside the cavity and fixedly connected to the air inlet. The diversion device has a plurality of vent holes. At least one of the purge ports penetrates the housing and is disposed along a direction perpendicular to the air inlet toward the exhaust port and tangentially to the housing wall.

[0019] The exhaust gas to be treated is introduced into the cavity through the air inlet;

[0020] Purge gas is continuously introduced into the cavity through the purge port;

[0021] The treated exhaust gas is discharged through the exhaust port.

[0022] The beneficial effects of the second aspect of the present invention or any possible implementation of the second aspect can be referred to the first aspect or any possible implementation of the first aspect, which will not be repeated here. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a side view of an exhaust gas treatment device according to an embodiment of this application;

[0025] Figure 2 This is a side sectional view of an exhaust gas treatment device according to an embodiment of this application;

[0026] Figure 3 This is a side sectional view of the exhaust gas treatment device according to another embodiment of this application;

[0027] Figure 4 for Figure 3 Schematic diagram of part A in the embodiment;

[0028] Figure 5 This is a cross-sectional view of the purge port of an exhaust gas treatment device according to an embodiment of this application.

[0029] Figure 6 This is a schematic diagram showing the internal gas and liquid flow directions during the operation of an exhaust gas treatment device according to an embodiment of this application.

[0030] Figure 7 This is a flowchart illustrating the working method of an exhaust gas treatment device according to an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100 - Exhaust gas treatment device; 10 - Intake pipe; 11 - Exhaust gas flow direction;

[0033] 20 - Exhaust pipe;

[0034] 30 - Air inlet; 35 - Drain outlet; 36 - Liquid flow direction generated by exhaust gas treatment;

[0035] 40 - Exhaust port; 45 - Perforated plate;

[0036] 50 - Outer shell; 51 - First segment; 52 - Second segment; 53 - Third segment; 55 - Cavity;

[0037] 60 - Diverter; 61 - Vent hole;

[0038] 70 - Exhaust gas treatment agent;

[0039] 80 - Purge port; 81 - Purge gas flow direction;

[0040] 90 - Feed port; 95 - Feed line. Detailed Implementation

[0041] To make the above-described objects, features, and advantages of the present invention more apparent and understandable, embodiments of the present disclosure are described below with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present disclosure.

[0042] The accompanying drawings illustrate various structural schematics according to embodiments of the present disclosure. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0043] As used herein, the singular forms “a,” “an,” and “the” include plural objects unless otherwise expressly indicated. As used herein, the term “or” is generally used to mean “and / or” unless otherwise expressly indicated. As used herein, the term “a number” is generally used to mean “at least one” unless otherwise expressly indicated. As used herein, the term “at least two” is generally used to mean “two or more” unless otherwise expressly indicated. Furthermore, the terms “first” and “second” 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, a feature defined with “first” or “second” may explicitly or implicitly include one or more of that feature.

[0044] Untreated industrial exhaust gases often pose a risk of corroding emission pipes. Taking acidic industrial exhaust gases as an example, the high moisture content in the exhaust gas causes the moisture to easily condense into liquid on the exhaust pipes, which then mixes with the emitted acidic gases to form an acidic liquid. This acidic liquid readily corrodes the exhaust pipes, leading to damage and leaks of acidic gases. This not only causes safety accidents but also severely impacts production efficiency.

[0045] Currently, there are two conventional methods for treating acidic industrial exhaust gases: dry air dehumidification and temperature difference dehumidification. The inventors analyzed these different methods and discovered the following problems:

[0046] First, the dry air dehumidification method: dehumidification is achieved by directly introducing dry air (CDA gas) into the acidic exhaust gas discharge pipe. This method can reduce moisture condensation in the acidic exhaust gas to a certain extent. However, excessive flow rate of purge gas into the exhaust pipe will affect the plant's negative pressure, while insufficient flow rate will affect the exhaust gas treatment effect, making the exhaust gas treatment effect unstable.

[0047] Second, temperature difference dehumidification method: By adjusting the exhaust pipe, the external conditions are used to heat the exhaust pipe, so as to reduce the temperature difference between the acidic exhaust gas and the exhaust pipe, and reduce the condensation of water vapor caused by the temperature difference. However, the exhaust pipe structure in this method is complex and the cost is high.

[0048] To address the aforementioned issues, this application provides an exhaust gas treatment device. A diversion device is installed at the air inlet, and a purge port is provided on the outer casing to introduce purge gas into the device. This creates a gas circulation within the device cavity, ensuring sufficient contact between the exhaust gas and the exhaust gas treatment agent carried within the device. This improves the exhaust gas treatment effect and reduces the corrosion of the exhaust pipe by the exhaust gas. Furthermore, this device has a simple structure and can be directly installed in the plant's pipelines, minimizing its impact on the plant's negative pressure.

[0049] Figures 1-2 This is a schematic diagram of the exhaust gas treatment device provided in an embodiment of the present invention. Please refer to it. Figure 1 and Figure 2As shown, the exhaust gas treatment device 100 provided in this application embodiment includes a housing 50, a diversion device 60, and at least one purge port 80; the housing 50 has a cavity 55 and an air inlet 30 and an exhaust port 40 communicating with the cavity 55, the cavity 55 is used to contain exhaust gas treatment agent 70; the diversion device 60 is disposed inside the cavity 55 and fixedly connected to the air inlet 30; the diversion device 60 has a plurality of vent holes 61 for dispersing the exhaust gas introduced through the air inlet 30; wherein, the exhaust gas treatment agent 70 fills the area formed between the diversion device 60 and the housing 50; the purge port 80 penetrates the housing 50 and is disposed along a direction perpendicular to the air inlet 30 toward the exhaust port 40 and externally tangential to the shell wall of the housing 50, the purge port 80 is used to introduce purge gas into the cavity 55 to form a gas circulation within the cavity 55. Figure 5 This is a schematic diagram showing the positional relationship between the purge port 80 and the outer casing 50 in an embodiment of this application. The purge port 80 is tangent to the shell wall of the outer casing 50, that is, the extension direction of the purge port 80 is perpendicular to the line connecting the connection point of the purge port 80 and the outer casing 50 and the center point of the outer casing 50. This arrangement is beneficial for the purge gas introduced into the exhaust gas treatment device 100 from the purge port 80 to drive the gas in the cavity 55 to form a circulation, thereby driving the exhaust gas to fully contact the exhaust gas treatment agent 70 and preventing the vent 61 of the diversion device 60 from being blocked, thus ensuring the effective dispersion of the exhaust gas by the diversion device 60.

[0050] The exhaust gas treatment device 100 of the present invention, by providing a diversion device 60 at the air inlet 30, disperses the exhaust gas to be treated after it enters the device 100 through the air inlet 30, and then contacts the exhaust gas treatment agent 70, thereby increasing the contact area between the exhaust gas and the exhaust gas treatment agent 70 and enhancing the exhaust gas treatment effect. Furthermore, the exhaust gas treatment device 100 of the present invention is provided with a purge port 80, through which purge gas is introduced into the cavity 55, which can drive the gas in the cavity 55 to form a circulation, allowing the exhaust gas to fully contact the exhaust gas treatment agent 70, improving the exhaust gas treatment effect, and also diluting the exhaust gas, further reducing the corrosive impact on subsequent exhaust pipes after the treated exhaust gas is emitted; in addition, it can reduce the risk of blockage of the vent 61 of the diversion device 60, ensuring the long-term operation of the exhaust gas treatment device 100.

[0051] Furthermore, in some embodiments of this application, the diversion device includes a housing with an opening at one end, the opening of which faces the air inlet and is fixedly connected to the air inlet. Please refer to... Figure 2In this embodiment, the diversion device 60 of the exhaust gas treatment device 100 is a housing with an opening at one end, which faces the air inlet 30 and is fixedly connected to the air inlet 30. With this configuration, after the exhaust gas enters the exhaust gas treatment device 100 of this embodiment through the air inlet 30, it is dispersed through the vent 61 of the diversion device 60, which can increase the contact area between the exhaust gas and the exhaust gas treatment agent 70 and improve the exhaust gas treatment effect.

[0052] In another embodiment of this application, the flow divider includes a pipe with openings at both ends. One end of the pipe is fixedly connected to an air inlet, and the other end is fixedly connected to an exhaust outlet. The cross-sectional area of ​​the flow divider gradually decreases in the direction away from the air inlet. Please refer to... Figure 3 The diversion device 60 of the exhaust gas treatment device 100 provided in this embodiment is a tube with openings at both ends. The end opening near the inlet 30 is connected to the inlet 30, and the end opening away from the inlet 30 is connected to the exhaust port 40. The cross-sectional area of ​​the tubular diversion device 60 gradually decreases in the direction away from the inlet 30, forming a cone shape. By setting the diversion device 60 to a cone shape, the dispersion effect on the exhaust gas entering the device from the inlet 30 is improved, promoting sufficient contact and reaction between the exhaust gas and the exhaust gas treatment agent 70. Furthermore, by connecting the diversion device 60 between the inlet 30 and the exhaust port 40, a small portion of the exhaust gas entering the device can be directly discharged from the exhaust port 40 without accumulating inside the exhaust gas treatment device 100. In this embodiment, when the exhaust gas treatment device 100 is installed in an actual gas pipeline system, it can reduce the impact on the internal pressure of the original gas pipeline system, giving the device better compatibility and practical value.

[0053] It should be understood that the above embodiments only describe two specific structures of the diversion device as preferred embodiments. In other embodiments, the diversion device may also have other structures, and the present invention is not limited thereto.

[0054] Furthermore, in some embodiments of the diversion device that include a pipe with openings at both ends, the opening at the end of the diversion device near the exhaust port is located in the same plane as the exhaust port, and the projection of this opening onto the plane where the exhaust port is located is covered by the exhaust port. The opening at the end of the diversion device near the exhaust port is fixedly connected to the exhaust port by a perforated plate. Please refer to... Figure 3 , Figure 4 As shown, the diameter of the opening of the diverter 60 near the exhaust port 40 is smaller than the diameter of the exhaust port 40, and it is located inside the exhaust port 40. In this case, the opening of the diverter 60 near the exhaust port 40 can be fixedly connected to the exhaust port 40 by a perforated plate 45, which is disposed between the exhaust port 40 and the opening of the diverter 60 near the exhaust port 40.

[0055] Furthermore, in some embodiments, the outer casing is a variable-diameter pipe, sequentially divided into a first section, a second section, and a third section along the direction from the air inlet to the exhaust outlet. The diameter of the second section is larger than the diameters of both the first and third sections, while the diameters of the first and third sections gradually increase towards the second section. Please refer to [link / reference]. Figure 1 The exhaust gas treatment device 100 provided in this embodiment of the invention has a housing 50 that is a variable-diameter pipe, which includes a first section 51, a second section 52, and a third section 53 sequentially along the direction from the air inlet 30 to the exhaust outlet 40. The first section 51 and the third section 53 are conical in shape, while the second section 52 is cylindrical in shape. The diameter of the second section 52 is larger than the diameters of the first section 51 and the third section 53. The diameters of the first section 51 and the third section 53 gradually increase along the direction towards the second section 52. This configuration, designing the housing 50 as an outward-expanding structure, helps to increase the accommodating space of the internal cavity 55 of the exhaust gas treatment device 100, thereby expanding the contact space between the exhaust gas and the exhaust gas treatment agent 70 and enhancing the exhaust gas treatment effect. In other embodiments, the housing 50 may also have other structures, which are not limited by this invention.

[0056] Furthermore, in some embodiments, the number of purge ports is set to two, and the two purge ports are symmetrically arranged along the direction from the air inlet to the exhaust port. Please refer to... Figure 1 , Figure 2 and Figure 5 , Figure 5 for Figure 1 , Figure 2 The top view of the embodiment shown shows two purge ports 80 symmetrically arranged along the direction from the inlet 30 toward the outlet 40. This arrangement facilitates the formation of a circulation of gas within the exhaust gas treatment device 100 by the purge gas introduced through the purge ports 80 (purge gas flow direction 81 is referenced). Figure 5 As shown in the figure, this increases the contact area between the exhaust gas and the exhaust gas treatment agent 70, thereby improving the exhaust gas treatment effect. In other embodiments of this application, the purge port 80 may be set to one or more, and may have other structures, orientations, and positions, which are not limited in this application.

[0057] Furthermore, the purge gas introduced into the exhaust gas treatment device provided in this embodiment of the invention includes compressed air or an inert gas. For example, when the exhaust gas to be treated by the exhaust gas treatment device provided in this embodiment of the invention is an acidic gas with a high water content, compressed air (CDA gas) can be used as the purge gas. Compressed air is a drying gas, which can dilute the water vapor in the exhaust gas, reduce the moisture content in the exhaust gas, and further improve the exhaust gas treatment effect. In other embodiments, the purge gas can also be other gases that are not likely to have dangerous interactions with the exhaust gas, such as nitrogen or other inert gases, and this application is not limited to this.

[0058] Furthermore, in some embodiments, the flow rate of the purge gas is 15-20 liters per minute, and more preferably 20 liters per minute. This setting ensures that the purge gas can drive the gas in the cavity to form a circulation, while also preventing the flow rate of the purge gas from being too high, which could affect the overall negative pressure of the tailpipe.

[0059] Furthermore, the exhaust gas treatment agent contained in the exhaust gas treatment device provided in this embodiment of the invention includes one of calcium chloride, activated carbon, alkaline absorbent, and acidic absorbent. For example, when the exhaust gas to be treated by the exhaust gas treatment device provided in this embodiment of the invention is an acidic gas with a high water content, the exhaust gas treatment agent contained in the device can be calcium chloride to reduce the water content of the acidic exhaust gas. Dry calcium chloride is highly soluble in water, forming a liquid compound (calcium chloride dihydrate) after dissolving in water. It is non-toxic, harmless, and stable, and will not interact with the acidic exhaust gas or produce harmful byproducts. In other embodiments, the type of exhaust gas treatment agent can be flexibly adjusted according to the type of exhaust gas to be treated and the desired treatment effect; this invention is not limited in this respect.

[0060] Furthermore, the exhaust gas treatment device of this embodiment also includes several drain outlets penetrating the outer casing. Please refer to... Figure 2 In this embodiment, the drain outlet 35 is located at the connection between the bottom opening of the diversion device 60 and the air inlet 30 of the housing 50, for discharging the liquid generated during the exhaust gas treatment process. For example, when the exhaust gas is an acidic gas with high water content and the exhaust gas treatment agent 70 is calcium chloride, the calcium chloride reacts with the water in the acidic exhaust gas to form a liquid compound (calcium chloride dihydrate), which can be discharged through the drain outlet 35 located between the air inlet 30 and the bottom opening of the diversion device 60, avoiding additional cleaning of the exhaust gas treatment device 100. The liquid flow direction 36 generated during exhaust gas treatment can be referenced. Figure 6 As shown. In other embodiments, the drain outlet may also be configured in other structures or locations, and the present invention is not limited thereto.

[0061] Furthermore, the exhaust gas treatment device of this embodiment also includes several feed ports penetrating the outer shell for adding the exhaust gas treatment agent into the cavity. Please refer to... Figure 2 In this embodiment, the exhaust gas treatment device 100 is provided with a feeding port 90, which is disposed through the side wall of the outer shell 50, for adding exhaust gas treatment agent 70 to the cavity 55. By providing the feeding port 90, it is convenient for the operator to periodically add exhaust gas treatment agent 70 to the cavity 55 of the exhaust gas treatment device 100, so as to maintain the continuous operation of the exhaust gas treatment device 100.

[0062] Furthermore, the feed port 90 is equipped with a sealing cap (not shown). During the exhaust gas treatment process by the exhaust gas treatment device 100, the feed port 90 is sealed by the sealing cap to prevent the escape of toxic and harmful exhaust gases. When the exhaust gas treatment device 100 is not in use, the operator can open the sealing cap and add the exhaust gas treatment agent 70 into the device through the feed port 90. The sealing cap is made of, for example, transparent PVC material, allowing the operator to observe the remaining amount of exhaust gas treatment agent 70 in the device through the feed port 90, so as to add the exhaust gas treatment agent 70 at the appropriate time. Further details can be found in the following sections. Figure 2 In some embodiments, the exhaust gas treatment device 100 is also provided with a feeding line 95, which is marked on the inner side wall of the housing 50 to confirm the remaining amount of exhaust gas treatment agent 70.

[0063] Furthermore, in this embodiment, the main body of the exhaust gas treatment device is made of stainless steel. Furthermore, the inner wall of the exhaust gas treatment device can be coated with a Teflon (tetrafluoroethylene, PTFE) coating, making the device less susceptible to corrosion by acidic or alkaline exhaust gases and extending its service life.

[0064] Furthermore, in this embodiment, the diameters of the air inlet and exhaust outlet of this exhaust gas treatment device can be set with reference to the diameter of the plant exhaust pipe to be connected. For example... Figure 2 As shown, in this embodiment of the exhaust gas treatment device 100, the air inlet 30 is fixedly connected to the air inlet pipe 10, and the diameter of the air inlet 30 is the same as the diameter of the air inlet pipe 10; the exhaust outlet 40 is fixedly connected to the exhaust pipe 20, and the diameter of the exhaust outlet 40 is the same as the diameter of the exhaust pipe 20. The air inlet pipe 10 and the exhaust pipe 20 can be factory exhaust pipes that require the installation of the exhaust gas treatment device 100.

[0065] In summary, the exhaust gas treatment device provided by the present invention includes a housing, a diversion device, and at least one purge port. The housing has a cavity and an air inlet and an exhaust outlet communicating with the cavity. The cavity is used to contain exhaust gas treatment agents. The diversion device is disposed inside the cavity and fixedly connected to the air inlet. The diversion device has several vent holes for dispersing the exhaust gas introduced through the air inlet. The purge port penetrates the housing and is disposed along a direction perpendicular to the air inlet and toward the exhaust outlet and tangential to the housing wall. The purge port is used to introduce purge gas into the cavity to form a gas circulation within the cavity. This invention uses a diversion device to disperse the exhaust gas entering the exhaust gas treatment device through the inlet, ensuring sufficient contact between the exhaust gas and the exhaust gas treatment agent, thus improving the treatment effect. Simultaneously, purge gas is introduced into the exhaust gas treatment device through several purge ports penetrating the outer shell, causing the gas within the device to circulate, increasing the contact area between the exhaust gas and the treatment agent, further enhancing the treatment effect, and diluting the exhaust gas to reduce its impact on subsequent exhaust pipes. Furthermore, by configuring the diversion device as a pipe with openings at both ends, connecting the two ends to the inlet and outlet of the exhaust gas treatment device respectively, this design helps reduce the impact on negative pressure in the factory's exhaust pipeline during practical applications, giving the invention strong compatibility and practicality.

[0066] On the other hand, embodiments of this application also provide a method for operating an exhaust gas treatment device, including the process described in the following steps. Figure 7 The following steps are shown:

[0067] Step 201: A tail gas treatment device is provided. The tail gas treatment device includes a housing, a diversion device, and a purge port. The housing has a cavity and an air inlet and an exhaust port communicating with the cavity. The diversion device is disposed inside the cavity and fixedly connected to the air inlet. The diversion device has a plurality of vent holes. At least one of the purge ports passes through the housing and is disposed along a direction perpendicular to the air inlet toward the exhaust port and tangentially to the housing wall.

[0068] Step 202: The exhaust gas to be treated is introduced into the cavity through the air inlet. The exhaust gas to be treated may be a gas with excessive moisture content, or a corrosive gas such as acidic or alkaline gas.

[0069] Step 203: Purge gas is continuously introduced into the cavity through the purge port. The exhaust gas to be treated enters the exhaust gas treatment device through the inlet, is dispersed by the diversion device, and then reacts with the exhaust gas treatment agent. The exhaust gas flow direction 11 can be referenced. Figure 6As shown. At this time, continuously introducing purge gas into the cavity of the exhaust gas treatment device through the purge port causes the gas inside the device to form a circulation, which can further enhance the full contact between the exhaust gas and the exhaust gas treatment agent, improve the exhaust gas treatment effect, and also purge the vents of the diversion device, reducing the risk of vent blockage. The purge gas flow direction 81 can be referenced. Figure 5 , Figure 6 As shown.

[0070] Step 204: The treated exhaust gas is discharged through the exhaust port. After being treated by the exhaust gas treatment device provided in this embodiment, the industrial exhaust gas can reduce its corrosive impact on subsequent exhaust pipes, reduce the risk of exhaust pipe leakage, and ensure the personal safety of workers.

[0071] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An exhaust gas treatment device, characterized by, The tail gas treatment device comprises: a shell, a shunt device and at least one purge port; the shell has a cavity and an air inlet and an air outlet connected to the cavity, the cavity is used to contain tail gas treatment reagents; the shunt device is arranged inside the cavity and fixedly connected to the air inlet, the shunt device has a plurality of air holes for dispersing the tail gas entering from the air inlet; the purge port penetrates through the shell and is arranged along a direction perpendicular to the air inlet towards the air outlet and outside the shell wall, the purge port is used to introduce purge gas into the cavity to form a gas circulation in the cavity.

2. The exhaust treatment device of claim 1, wherein, The shunt device comprises a shell with an opening at one end, and the opening of the shell is directed towards the air inlet and fixedly connected to the air inlet.

3. The exhaust treatment device of claim 1, wherein, The shunt device comprises a tube body with openings at both ends, one end of the tube body is fixedly connected to the air inlet, and the other end is fixedly connected to the air outlet; the cross-sectional area of the tube body gradually decreases in the direction away from the air inlet.

4. The exhaust treatment device of claim 1, wherein, The shell is a variable-diameter tube body, which is sequentially divided into a first segment, a second segment and a third segment in the direction from the air inlet to the air outlet, the pipe diameter of the second segment is larger than the pipe diameters of the first segment and the third segment, and the pipe diameters of the first segment and the third segment gradually increase in the direction towards the second segment.

5. The exhaust treatment device of claim 1, wherein, The number of purge ports is two, and the two purge ports are arranged in axial symmetry in the direction from the air inlet to the air outlet.

6. The exhaust treatment device of claim 1, wherein, The purge gas comprises compressed air or inert gas; and / or, the flow rate of the purge gas is 15-25 liters per minute.

7. The exhaust treatment device of claim 1, wherein, The tail gas treatment reagents comprise one of calcium chloride, activated carbon, alkaline absorbent and acidic absorbent.

8. The exhaust treatment device of claim 1, wherein, The tail gas treatment device further comprises a plurality of drainage ports penetrating through the shell, which are used to drain the liquid generated during the tail gas treatment process.

9. The exhaust treatment device of claim 1, wherein, The tail gas treatment device further comprises a plurality of charging ports penetrating through the shell, which are used to add the tail gas treatment reagents into the cavity.

10. A method of operating a tail gas treatment apparatus, characterized by, The tail gas treatment device comprises the following steps: providing a tail gas treatment device, which comprises a shell, a shunt device and a purge port, the shell has a cavity and an air inlet and an air outlet connected to the cavity, the shunt device is arranged inside the cavity and fixedly connected to the air inlet, the shunt device has a plurality of air holes, and at least one purge port penetrates through the shell and is arranged along a direction perpendicular to the air inlet towards the air outlet and outside the shell wall; introducing the tail gas to be treated into the cavity through the air inlet; continuously introducing purge gas into the cavity through the purge port; discharging the treated tail gas through the air outlet.

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