Filtering device suitable for treating high-concentration chlorine

Abstract

The utility model provides a filtering device suitable for treating high-concentration chlorine, which comprises a shell and a blowing circulating system, a grating plate is arranged in the shell to divide the internal space of the shell into a first space for accommodating gas to be filtered and a second space for accommodating filtered gas, a filter bag is arranged in a mounting hole on the grating plate, and the first space and the second space are communicated with each other. A nozzle of the blowing circulating system is arranged in the second space, corresponds to the filter bag and is communicated with the air storage bag; and the air storage bag sucks and sprays air through the nozzle. When the filter bag needs to be cleaned, the gas storage bag firstly collects and pressurizes part of gas in the first space through the nozzle, and then releases the gas to the filter bag through the nozzle, so that dust attached to the filter bag is cleaned. In the process of cleaning the dust on the filter bag, compressed air and other gases outside the shell do not need to be introduced, so that the possibility that moisture enters the shell is reduced, and the corrosion to a filter device suitable for treating high-concentration chlorine due to acid liquid drops generated by the combination of the moisture and the chlorine is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gas purification and environmental protection, specifically to a filtration device suitable for treating high-concentration chlorine gas. Background Technology

[0002] When handling chlorine gas, especially high-concentration chlorine gas (greater than 93%), filter bags are needed to separate dust particles from the chlorine. As the filtration process continues, a large amount of dust accumulates on the surface of the filter bags, affecting filtration efficiency. Therefore, related technologies typically use compressed air jet cleaning to remove the dust accumulated on the filter bag surface. In-line jet cleaning dust removal technology is widely used because it does not require stopping the filtration process and has high efficiency. However, compressed air may mix with a small amount of moisture during its transport from the gas source to the filtration device. When mixed with chlorine, this moisture produces acidic droplets that easily corrode the filtration device. This is especially true for in-line jet cleaning dust removal technology, which operates in a high-concentration chlorine environment, making it even more susceptible to corrosion and affecting the lifespan of the filtration device. Utility Model Content

[0003] This invention provides a filtration device suitable for processing high-concentration chlorine gas. It improves upon the technical problem in the prior art where compressed air easily mixes with moisture, leading to a decrease in the lifespan of the filtration device. It can reduce the mixing of chlorine gas and moisture, thereby increasing the lifespan of the filtration device.

[0004] To achieve the above objectives, this utility model provides a filtration device suitable for treating high-concentration chlorine gas, comprising:

[0005] The housing has a grid plate along its axial cross-section, which divides the interior of the housing into a first space and a second space. The grid plate has a plurality of mounting holes spaced apart, and filter bags are installed in the mounting holes, with the openings of the filter bags facing the second space. The housing has an air inlet and an air outlet, with the air inlet connected to the first space and the air outlet connected to the second space.

[0006] The pulse-jet circulation system includes a nozzle and a gas storage tank connected to each other. The nozzle is located in the second space and corresponds to the filter bag. The gas storage tank is connected to the second space through the nozzle and is connected to an air pump. The gas storage tank is used for drawing in and releasing air through the nozzle. In use, the gas to be filtered enters the second space through the inlet, is filtered by the filter bag on the grid plate, and then enters the first space. When the filter bag needs cleaning, the gas storage tank first collects and pressurizes a portion of the gas in the first space through the nozzle, and then releases the gas to the filter bag through the nozzle, thereby cleaning the dust adhering to the filter bag. Since it is not necessary to introduce compressed air or other gases from outside the housing during the dust cleaning process, the possibility of moisture entering the housing is reduced, which helps to avoid moisture combining with chlorine to form acidic droplets that could corrode the filter device for treating high-concentration chlorine. Furthermore, filtration can be performed simultaneously during the dust cleaning process, which helps to improve the efficiency of chlorine filtration.

[0007] As an optional technical solution, the device also includes an ash hopper, which is disposed corresponding to the grid plate. The ash hopper is connected to the first space along the direction from the second space to the first space, and an ash discharge port is provided at the end of the ash hopper facing away from the grid plate. Dust that is detached from the filter bag by the airflow ejected from the nozzle will fall into the ash hopper through the first space and finally be transferred out of the ash discharge port of the filtration device suitable for treating high-concentration chlorine gas.

[0008] As an optional technical solution, a plurality of mounting holes are arranged in a row tangentially along the housing, and multiple rows of mounting holes are arranged at intervals radially along the housing;

[0009] The jet-blowing circulation system also includes jet pipes disposed in the second space. Multiple jet pipes are arranged corresponding to each row of mounting holes. Each jet pipe is connected to the gas storage tank, and nozzles are disposed on the jet pipes. During gas filtration, jetting gas into the filter bags to remove dust causes a decrease in the gas filtration rate of the filter bags. By using nozzles on different jet pipes to spray gas separately, the filter bags in a specific row of mounting holes can be cleaned selectively, thereby maintaining the filtration efficiency of the filtration device suitable for treating high-concentration chlorine gas while cleaning the dust from the filter bags.

[0010] As an optional technical solution, two air storage bags are provided, positioned on either side of the housing along the extension direction of the blowpipe. The blowpipe, arranged radially at intervals along the housing, is alternately connected to the two air storage bags. Each air storage bag requires a cycle of intake-pressurization-expulsion to supply air to the nozzle. When the dust content in the gas to be filtered is high, the efficiency of a single air storage bag's cycle may be insufficient. Alternating airflow from the two air storage bags facilitates timely cleaning of dust accumulated on the filter bag when the dust content in the gas to be filtered is high.

[0011] As an optional technical solution, the jetting circulation system also includes a pulse valve connected to the jetting pipe.

[0012] As an optional technical solution, the housing is provided with multiple manholes, which are connected to the second space, and the multiple manholes are spaced apart along the circumference of the housing.

[0013] As an optional technical solution, the outer periphery of the housing is provided with multiple reinforcing rings, which are spaced apart along the axial direction of the housing.

[0014] As an optional technical solution, the deviation between the center of the nozzle and the center of the mounting hole is less than or equal to 0.5 mm. This technical solution facilitates the smooth blowing of the accumulated dust on the filter bag into the ash hopper according to the resistance setting requirements.

[0015] As an optional technical solution, the filter bag is made of polyester needle-punched felt with a tetrafluoroethylene coating.

[0016] As an optional technical solution, the filter bag is integrally molded.

[0017] One or more technical solutions provided by this utility model have at least the following technical effects or advantages:

[0018] This utility model discloses a filtration device suitable for treating high-concentration chlorine gas. It comprises a housing and a pulse-jet circulation system. The housing contains a grid plate that divides the internal space into a first space for receiving the gas to be filtered and a second space for receiving the filtered gas. Filter bags are installed in mounting holes on the grid plate. Nozzles of the pulse-jet circulation system are positioned in the second space, corresponding to the filter bags and connected to a gas storage tank. The gas storage tank draws in and releases air through the nozzles. When the filter bags need cleaning, the gas storage tank first collects and pressurizes a portion of the gas in the first space through the nozzles, then releases the gas back to the filter bags through the nozzles, thereby cleaning the dust adhering to the filter bags. Since the cleaning process does not require the introduction of compressed air or other gases from outside the housing, the possibility of moisture entering the housing is reduced. This helps prevent moisture from combining with chlorine gas to form acidic droplets that could corrode the filtration device for treating high-concentration chlorine gas. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the embodiments of the present invention, constitute a part of the present invention and do not limit the embodiments of the present invention.

[0020] Figure 1 This is a front view of the filtration device of this utility model suitable for treating high concentrations of chlorine gas;

[0021] Figure 2 yes Figure 1 A magnified view of a portion of region L in the middle;

[0022] Figure 3 yes Figure 1 Top sectional view of a filtration device suitable for treating high concentrations of chlorine gas;

[0023] Figure 4 yes Figure 1 A top view schematic diagram of a filtration device suitable for treating high concentrations of chlorine gas.

[0024] Explanation of reference numerals in the attached figures

[0025] Housing-1; Grille-12; Mounting hole-121; First space-13; Air inlet-131; Second space-14; Air outlet-141; Manhole-142; Reinforcing ring-15; Vent spare port-16;

[0026] Nozzle-21; Air reservoir-22; Blowpipe-23;

[0027] Ash hopper-3; Ash discharge port-31. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In this invention, the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0031] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a direct connection, an indirect connection via an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0032] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0033] Example 1

[0034] This embodiment provides a filtration device suitable for treating high-concentration chlorine gas, including a housing 1 and a pulse-jet circulation system. A grid plate 12 is provided along the axial cross-section inside the housing 1, dividing the interior of the housing 1 into a first space 13 and a second space 14. Multiple mounting holes 121 are spaced apart on the grid plate 12, and filter bags are mounted on the mounting holes 121, with the openings of the filter bags facing the second space 14. The housing 1 has an air inlet 131 and an air outlet 141, with the air inlet 131 connected to the first space 13 and the air outlet 141 connected to the second space 14. The pulse-jet circulation system includes a connected nozzle 21 and an air storage tank 22. The nozzle 21 is located in the second space 14, corresponding to the filter bags. The air storage tank 22 is connected to the second space 14 through the nozzle 21 and is connected to an air pump. The air storage tank 22 is used for drawing in and expelling air through the nozzle 21.

[0035] In use, the filtration device for treating high-concentration chlorine gas of this application involves the gas to be filtered entering the second space 14 through the inlet 131, being filtered by the filter bags on the grid plate 12, and then entering the first space 13. When the filter bags need cleaning, the gas storage tank 22 first collects and pressurizes a portion of the gas in the first space 13 through the nozzle 21, and then releases the gas to the filter bags through the nozzle 21, thereby cleaning the dust adhering to the filter bags. Since it is not necessary to introduce compressed air or other gases from outside the housing 1 during the dust cleaning process, the possibility of moisture entering the housing 1 is reduced, which helps to avoid the formation of acidic droplets by moisture combining with chlorine gas, which could corrode the filtration device for treating high-concentration chlorine gas. In addition, filtration can be performed simultaneously during the dust cleaning process, which helps to improve the efficiency of chlorine gas filtration.

[0036] Optionally, the top of the housing 1 is also provided with a vent 16 that communicates with the second space 14.

[0037] Example 2

[0038] As an optional technical solution, the device also includes an ash hopper 3, which is disposed corresponding to the grid plate 12. The ash hopper 3 is connected to the first space 13 along the direction from the second space 14 to the first space 13. An ash discharge port 31 is provided at the end of the ash hopper 3 facing away from the grid plate 12. The dust that falls off the filter bag due to the airflow ejected from the nozzle 21 will fall into the ash hopper 3 through the first space 13 and finally be transferred out through the ash discharge port 31. This is suitable for a filtration device that can handle high concentrations of chlorine gas.

[0039] As an optional technical solution, multiple mounting holes 121 are arranged in a row tangentially along the housing 1, and multiple rows of mounting holes 121 are arranged at intervals radially along the housing 1;

[0040] The pulse-jet circulation system also includes pulse-jet pipes 23, which are disposed in the second space 14. Multiple pulse-jet pipes 23 are provided, corresponding to each row of mounting holes 121. The pulse-jet pipes 23 are connected to the gas storage tank 22, and nozzles 21 are disposed on the pulse-jet pipes 23. During gas filtration, spraying gas onto the filter bags to remove dust will cause a decrease in the gas filtration rate of the filter bags. By spraying gas from the nozzles 21 on different pulse-jet pipes 23, the filter bags in a specific row of mounting holes 121 can be cleaned selectively, thereby maintaining the filtration efficiency suitable for handling high-concentration chlorine gas while cleaning the dust from the filter bags.

[0041] As an optional technical solution, two air storage tanks 22 are used, positioned on both sides of the housing 1 along the extension direction of the blowpipe 23. The blowpipe 23, arranged radially at intervals along the housing 1, is alternately connected to the two air storage tanks 22. Supplying air to the nozzle 21 from a single air storage tank 22 requires a cycle of intake-pressurization-exhaust. When the dust content in the gas to be filtered is high, the efficiency of a single air storage tank 22 in this cycle may be insufficient. Alternating exhaust from the nozzle 21 by the two air storage tanks 22 facilitates timely cleaning of dust accumulated on the filter bag when the dust content in the gas to be filtered is high.

[0042] As an optional technical solution, the jetting circulation system also includes a pulse valve, which is connected to the jetting pipe 23.

[0043] Preferably, the jetting circulation system further includes a separator and a valve, which are connected to the jetting pipe 23.

[0044] As an optional technical solution, the housing 1 is provided with multiple manholes 142, which are connected to the second space 14, and the multiple manholes 142 are spaced apart along the circumference of the housing 1.

[0045] As an optional technical solution, the outer periphery of the housing 1 is provided with a plurality of reinforcing rings 15, which are spaced apart along the axial direction of the housing 1.

[0046] As an optional technical solution, the deviation between the center of nozzle 21 and the center of mounting hole 121 is less than or equal to 0.5 mm. This technical solution facilitates the smooth blowing of accumulated dust on the filter bag into the ash hopper 3 according to the resistance setting requirements.

[0047] As an optional technical solution, the filter bag is made of polyester needle-punched felt with a tetrafluoroethylene coating.

[0048] As an optional technical solution, the filter bag is integrally molded. Preferably, the filter bag consists of a bag body and a bag cage. The filtration efficiency of the bag body needs to reach 96% or higher. The raw materials used to make the bag body are cut as a whole, and the bag body is reasonably cut without seams to ensure the bottom strength and erosion resistance of the bag body. The bag body material has good acid and alkali resistance, wear resistance, hydrolysis resistance and oxidation resistance.

[0049] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A filtration device suitable for treating high-concentration chlorine gas, characterized in that, include: The housing has a grid plate along its axial cross-section, which divides the interior of the housing into a first space and a second space. The grid plate has a plurality of mounting holes spaced apart, and filter bags are installed in the mounting holes, with the openings of the filter bags facing the second space. The housing has an air inlet and an air outlet, with the air inlet connected to the first space and the air outlet connected to the second space. The jetting circulation system includes a nozzle and an air storage tank connected to each other. The nozzle is disposed in the second space and corresponds to the filter bag. The air storage tank is connected to the second space through the nozzle and is connected to an air pump. The air storage tank is used to draw in and release air through the nozzle.

2. The filtration device for treating high-concentration chlorine gas according to claim 1, characterized in that, It also includes an ash hopper, which is provided corresponding to the grid plate. The ash hopper is connected to the first space along the direction from the second space to the first space, and the end of the ash hopper away from the grid plate is provided with an ash discharge port.

3. A filtration device suitable for treating high-concentration chlorine gas according to claim 1, characterized in that, The mounting holes are arranged in a row tangentially to the housing, and the multiple rows of mounting holes are arranged at intervals radially to the housing; The jetting circulation system further includes jetting pipes, which are disposed in the second space. There are multiple jetting pipes, which are disposed corresponding to each row of mounting holes. The jetting pipes are connected to the gas storage tank, and the nozzles are disposed on the jetting pipes.

4. A filtration device suitable for treating high-concentration chlorine gas according to claim 3, characterized in that, The number of gas storage bags is two, and the two gas storage bags are arranged on both sides of the housing along the extension direction of the blow pipe. The blow pipes, which are arranged radially at intervals along the housing, are alternately connected to the two gas storage bags.

5. A filtration device suitable for treating high-concentration chlorine gas according to claim 3, characterized in that, The jetting circulation system also includes a pulse valve connected to the jetting pipe.

6. A filtration device suitable for treating high-concentration chlorine gas according to claim 1, characterized in that, The housing is provided with multiple manholes, which are connected to the second space, and the multiple manholes are spaced apart along the circumference of the housing.

7. A filtration device suitable for treating high-concentration chlorine gas according to claim 1, characterized in that, The outer periphery of the housing is provided with a plurality of reinforcing rings, which are spaced apart along the axial direction of the housing.

8. A filtration device suitable for treating high-concentration chlorine gas according to claim 1, characterized in that, The deviation between the center of the nozzle and the center of the mounting hole is less than or equal to 0.5 mm.

9. A filtration device suitable for treating high-concentration chlorine gas according to claim 1, characterized in that, The filter bag is made of polyester needle-punched felt with a tetrafluoroethylene coating.

10. A filtration device suitable for treating high-concentration chlorine gas according to claim 1, characterized in that, The filter bag is integrally molded.

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