Inlet air treatment device and fan provided with same

Abstract

The utility model discloses an air inlet processing device and a fan provided with the device, the air inlet processing device comprises an air inlet room, two air filtering chambers are formed in the air inlet room, a roller shutter filter is installed on the side wall of the first air filtering chamber, the two air filtering chambers are in gas communication through the roller shutter filter, and the first air filtering chamber is communicated with the second air filtering chamber. A first air inlet communicated with the outside is further formed in the side wall of the first air filtering chamber, a shutter is arranged at the first air inlet, a second-stage fine filter is arranged in the second air filtering chamber, and an air outlet of the second-stage fine filter is connected with an air inlet of the desulfurization and oxidation fan in a matched mode through an air outlet pipe; the combination of the roller shutter filter and the two-stage fine filter is adopted in the two air filtering chambers respectively, two-stage filtering does not affect each other, maintenance and replacement can be carried out respectively in the non-stop state, the risk that a filtering system is blocked is reduced, the frequency of replacement and maintenance is reduced, it is guaranteed that the performance of a fan is stable, and the service life of the fan is prolonged. And long-term stable operation of the thermal power generating unit is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of dust removal devices, and in particular to an air inlet treatment device used at the air inlet of a desulfurization and oxidation blower in a thermal power plant. Background Art

[0002] During the power generation process in thermal power plants, the flue gas produced by burning coal contains large amounts of sulfur dioxide, which needs to be treated in a desulfurization system to reduce environmental pollution. Oxidation fans play a crucial role in the desulfurization process. Their primary function is to deliver pressurized air to the absorber slurry pool, providing oxidizing air for the slurry to oxidize calcium sulfite to form stable calcium sulfate.

[0003] Currently, thermal power plant desulfurization and oxidation fans, which draw in outside air for the desulfurization and oxidation process, typically have filter plates installed at the fan inlet to filter out dust and other particulate matter. While traditional filter plate filtration solutions are low-cost, they only provide basic air purification, and their filtration efficiency and dust holding capacity remain insufficient in harsh climates. Particularly in northern regions, where poor climatic conditions and frequent seasonal weather events such as catkins, dust, and sandstorms occur, such as in Inner Mongolia, these adverse weather conditions can frequently cause the filter pads at the desulfurization and oxidation fan inlet to clog. Once the filter pads become clogged, the unit must be shut down for replacement, which not only increases maintenance costs but also impacts the long-term stable operation of the thermal power unit.

[0004] Chinese utility model patent CN201420217059.1 discloses a four-stage air filtration device, which includes a shutter, a filter chamber and a filter. The filter is composed of a first-stage filter and a second-stage filter, a third-stage filter, and a fourth-stage filter arranged in a U-shaped series on both sides of the filter chamber. The shutter in front of the first-stage filter is an air inlet. The first-stage filter is a plate filter, the second-stage filter and the third-stage filter are bag filters, and the fourth-stage filter is a box filter. Each filter chamber is equipped with an inspection door, and the filter is fixed on a stainless steel bracket, which is fixed to the filter chamber beam in multiple directions. Although the air filtration device disclosed in this patent document can effectively filter and remove dust from the air, its overall structure is a double-layer arrangement, with the first-stage filter located on the upper layer of the other three filters. The four filters are arranged in a U-shaped shape, which is inconvenient when the first-stage filter needs to be inspected.

[0005] In addition, Chinese utility model patent CN202023204775.0 discloses a window-nested air filtration device, which can filter the air entering the fan room in use to reduce suspended matter in the air in the fan room. The device mainly includes a closed box for embedding and fixing on the wall window, an air inlet is provided on the suspended part on the bottom plate of the box, and an air outlet connected to the wall vent is provided on the part of the back plate of the box near the top of the box. The space from the air inlet to the air outlet in the box is a filter duct with three-stage filtration. The three-stage filtration is a first filter layer with a plate-type primary filter, a second filter layer with a plate-type medium-efficiency filter, and a third filter layer with a plate-type medium-efficiency filter, which are arranged in sequence from bottom to top. The box is also provided with an inspection door for opening and replacing filters. Although the device disclosed in the patent document can be directly embedded and fixed on the window of an existing fan room, so that the air outlet of the filter device is just connected to the vent on the wall, when working, the outside air is sucked in from the air inlet and enters the fan room after three-stage filtration through the filter device, which effectively improves the air quality entering the fan room. However, the three-stage filtration in the patent document is all plate filters, and the replacement frequency of plate filters is relatively high, which increases maintenance costs.

[0006] Therefore, existing air dust removal and filtration devices still have many drawbacks. The aforementioned solutions cannot effectively address the problem of high levels of impurities in the incoming air of thermal power plant desulfurization and oxidation fans in inclement weather, which can easily clog the filter cotton and lead to frequent filter replacement. Therefore, it is necessary to propose a new technical solution to address this problem. Utility Model Content

[0007] The present application provides an air inlet treatment device and a fan equipped with the device to solve the problem that the air inlet of the desulfurization oxidation fan in the thermal power plant is easily blocked in bad weather, resulting in frequent shutdown for maintenance.

[0008] In order to achieve the above objectives, this application provides the following technical solutions:

[0009] On the one hand, the present application provides an air intake processing device, including an air intake room, in which a first air filter chamber and a second air filter chamber are formed. A mounting hole is provided on the side wall of the first air filter chamber, and a roller filter is installed in the mounting hole. The first air filter chamber and the second air filter chamber are connected to each other through the roller filter. A first air inlet connected to the outside world is also provided on the side wall of the first air filter chamber, and a debris filtering component is provided at the first air inlet. A secondary fine filter is provided in the second air filter chamber, and an air outlet pipe is provided at the air outlet of the secondary fine filter. The air outlet pipe passes through the end of the second air filter chamber to form a connection port that is compatible with the air inlet of the desulfurization oxidation fan.

[0010] Furthermore, in the above technical solution, an inspection door for inspecting the rolling filter is installed on the side wall of the first air filter chamber, and an inspection door for inspecting the secondary fine filter is installed on the side wall of the second air filter chamber.

[0011] Furthermore, the air inlet room is a rectangular box-type structure, and a partition wall is provided in the air inlet room. The partition wall separates the air inlet room into a first air filter room and a second air filter room, and the roller filter is installed on the partition wall.

[0012] Furthermore, the first air inlet is arranged opposite to the rolling filter, and the debris filtering component includes a shutter installed at the first air inlet.

[0013] Furthermore, the secondary fine filter is a plate filter, a pleated filter, a bag filter or a box filter, and the secondary fine filter is a G4 grade filter.

[0014] Furthermore, a through hole is provided on the top of the second air filter chamber to allow the air outlet pipe to pass through.

[0015] On the other hand, the present application also provides a fan equipped with the above-mentioned air inlet treatment device, the fan is a desulfurization and oxidation fan, and the air inlet of the fan is connected to the air outlet pipe of the air inlet treatment device.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] This application is based on further analysis and research on existing technical problems, and recognizes that the filter cotton at the air inlet of the desulfurization oxidation fan of a thermal power plant is easily clogged by debris such as catkins and dust under severe weather conditions, resulting in frequent equipment shutdown and maintenance. To this end, this application provides an air intake treatment device, which realizes step-by-step filtration through two air filter chambers in the air intake room. The first air filter chamber is equipped with a roller filter and a debris filtering component, which can first block larger particles (such as catkins, dust, etc.) and reduce the impact of these debris on subsequent filters. The second air filter chamber is equipped with a secondary fine filter, which can more efficiently filter out the remaining smaller particles, such as fine dust and tiny particles, to ensure the cleanliness of the fan intake quality. The roller filter has an automatic cleaning and replacement function. , which can reduce the frequency of manual maintenance; furthermore, double air filtration can not only effectively prevent clogging by debris, but also maintain a relatively large air flow channel, avoid excessive air flow loss, and achieve high filtration efficiency without affecting the air intake flow; in addition, since a combination of roller filters and two-stage fine filters are respectively used in the two air filter chambers, the two-stage filtration does not affect each other, and can be maintained and replaced separately without stopping the machine. The two-stage filtration also reduces the risk of the filter system being blocked, thereby reducing the frequency of replacement and maintenance; therefore, the present application can effectively solve the problem of blockage of the air inlet of the desulfurization oxidation fan, and brings higher operating efficiency, less maintenance requirements and more stable fan performance, which is beneficial to the long-term stable operation of the thermal power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, based on the technical concepts and exemplary drawings disclosed in this application, those skilled in the art are able to easily make routine adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, and dimensional ratios of certain units (components).

[0019] Figure 1 This is a schematic diagram of the overall structure of the air intake processing device provided by the present application in an embodiment;

[0020] Figure 2 It is demolished Figure 1 Schematic diagram of the structure of the remaining part behind the front wall of the central air inlet room. The arrows in the figure indicate the direction of air flow.

[0021] Description of reference numerals:

[0022] 1. Air intake room; 11. First air filter chamber; 12. Second air filter chamber; 13. Rolling filter access door; 14. Secondary fine filter access door;

[0023] 2. Venetian blinds;

[0024] 3. Rolling filter;

[0025] 4. Secondary fine filter;

[0026] 5. Air outlet duct. DETAILED DESCRIPTION

[0027] The present application will be further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0028] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", etc. in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (for example, they should not be understood as emphasizing the degree of importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0029] Terms such as "upper," "lower," "left," "right," and "center" used in this application are generally intended to facilitate intuitive understanding when compared with the accompanying drawings and are not intended to be absolute limitations on positional relationships in actual products. Changes to these relative positional relationships are considered within the scope of this application without departing from the technical concepts disclosed herein.

[0030] Example 1

[0031] This embodiment provides an air intake processing device, see Figure 1 , which mainly includes an air intake room 1, in which a first air filter chamber 11 and a second air filter chamber 12 are formed, which are connected in sequence. The first air filter chamber 11 and the second air filter chamber 12 are arranged adjacent to each other on the left and the right. Figure 2 A mounting hole is provided on the side wall of the first air filter chamber 11, and a rolling filter 3 is installed in the mounting hole. The first air filter chamber 11 and the second air filter chamber 12 are in gas communication through the rolling filter 3. A first air inlet communicating with the outside is also provided on the side wall of the first air filter chamber 11. A debris filtering component for filtering large particles of impurities is provided at the first air inlet. A secondary fine filter 4 for filtering tiny particles is provided in the second air filter chamber 12. An air outlet pipe 5 is provided at the air outlet of the secondary fine filter 4. The air outlet pipe 5 passes through the end of the second air filter chamber 12 to form a connection port adapted to the air inlet of the desulfurization oxidation fan.

[0032] The present application achieves step-by-step filtration by providing two air filter chambers within the air inlet chamber 1. A debris filter component is provided at the first air inlet of the first air filter chamber 11, which can initially intercept large debris (such as catkins, leaves, paper, plastic bags, etc.), preventing these larger debris from directly entering the first air filter chamber 11, effectively reducing the burden on subsequent filters. A rolling screen filter 3 is used as a primary filter component within the first air filter chamber 11, effectively addressing the interception of large particles of debris. The rolling screen filter 3 in the present application is a commercially available rolling screen filter 3 with an automatic cleaning and filter replacement function. The use of this rolling screen filter 3 can reduce the frequency of filter maintenance and reduce fan downtime caused by excessive contamination. A secondary fine filter 4 is provided in the second air filter chamber 12 to handle the remaining fine particles, avoiding the problem of a single filter being quickly clogged, thereby reducing the frequency of downtime for replacement and cleaning. In severe weather conditions, especially when there is a large amount of easily dispersed materials such as catkins, the present application can effectively prevent these debris from blocking the air inlet of the desulfurization and oxidation fan through two-stage filtration, ensuring the normal operation of the fan.

[0033] In this embodiment, see Figure 1 A roller filter access door 13 is installed on the side wall of the first air filter chamber 11, and a secondary fine filter access door 14 is installed on the side wall of the second air filter chamber 12. After the access doors are installed, maintenance personnel can conveniently enter the filter chamber to inspect and replace the filters without disassembling the entire air intake treatment device. This greatly shortens maintenance time and allows maintenance personnel to complete routine maintenance and repair sudden faults more quickly, thereby reducing the risk of fan downtime maintenance.

[0034] In this embodiment, the air intake room 1 is a rectangular box-like structure. A partition wall is provided within the air intake room 1, dividing the air intake room 1 into a first air filter chamber 11 and a second air filter chamber 12. The roller filter 3 is mounted on the partition wall. By providing a partition wall to divide the air intake room 1 into two independent air filter chambers, the air filtration process at different stages can be better managed. The first air filter chamber 11 can be equipped with a primary filter, while the second air filter chamber 12 can be equipped with a more efficient fine filter. Different air circulation areas can be adjusted and optimized as needed to improve the filtration efficiency of the entire system.

[0035] In order to maintain a high filtration efficiency without affecting the air flow rate, the present application selects two-stage filtration. In other embodiments, the number of filtration stages can also be increased according to specific needs.

[0036] The present application installs the rolling filter 3 directly on the partition wall, which can make the arrangement of the filter more reasonable, optimize the air circulation path, reduce the resistance and loss in the air flow, and the rolling filter 3 can be easily cleaned, inspected and replaced regularly, thereby ensuring that the filter is always in an efficient working state. In addition, installing the rolling filter 3 on the partition wall not only facilitates the staff to regularly inspect, clean and replace the filter, but also improves the convenience and efficiency of maintenance operations. The staff can quickly enter the relevant area for maintenance without frequently disassembling other components, thereby improving the overall operating efficiency of the equipment.

[0037] In this embodiment, the first air inlet is arranged opposite to the roller filter 3, and the debris filtering component includes a venetian blind 2 installed at the first air inlet. As a preliminary protective component, the venetian blind 2 can effectively intercept larger debris in the air (such as dust, leaves, small particles, etc.) to prevent these debris from directly entering the filtration system. This can reduce the burden on the roller filter 3, reduce its pollution accumulation, extend the service life of the filter, and improve the filtration efficiency. In addition, the venetian blind 2 can not only block debris, but also adjust the direction of the airflow to a certain extent. By reasonably adjusting the opening and closing angles of the venetian blind 2, the airflow distribution entering the air inlet room 1 can be optimized, the air flow can be guided, and the vortex phenomenon caused by irregular or uneven air intake can be reduced, avoiding waste and unstable flow in the air flow, making the air flow more uniform, thereby optimizing the efficiency of the overall airflow system.

[0038] Of course, in other embodiments, the debris filtering component arranged opposite to the rolling filter 3 can also be one or more layers of filter screens capable of filtering large particles of impurities, and the pore size of the filter screens can be selected and adapted according to the air conditions in the area of ​​use.

[0039] In this embodiment, a mounting bracket for a secondary fine filter 4 is provided within the second air filter chamber 12. The secondary fine filter 4 can be any commercially available plate filter, pleated filter, bag filter, or box filter, as long as it meets the filtration requirements. Preferably, the secondary fine filter 4 is a G4 filter. A G4 filter effectively removes smaller particulate matter (such as dust and pollen), ensuring cleaner air.

[0040] Therefore, the air intake processing device provided by the present application realizes step-by-step filtration through the two air filter chambers in the air intake room 1. The first air filter chamber 11 is equipped with a roller filter 3 and is provided with a debris filtering component, which can first block larger particles (such as catkins, dust, etc.) and reduce the impact of these debris on subsequent filters. The second air filter chamber 12 is provided with a secondary fine filter 4, which can more efficiently filter out the remaining smaller particles, such as fine dust and tiny particles, to ensure the cleanliness of the fan intake quality. The roller filter 3 has an automatic cleaning and replacement function, which can reduce the frequency of manual maintenance. Furthermore, the present application can not only effectively prevent debris blockage through double air filtration, At the same time, it can also maintain a relatively large air flow channel, avoid excessive air flow loss, and achieve high filtration efficiency without affecting the air intake flow; in addition, since a combination of a roller filter 3 and a secondary fine filter 4 is used in the two air filter chambers respectively, the two-stage filtration does not affect each other, and can be maintained and replaced separately without stopping the machine. The two-stage filtration also reduces the risk of the filtration system being blocked, thereby reducing the frequency of replacement and maintenance; therefore, the present application can effectively solve the problem of blockage of the air inlet of the desulfurization oxidation fan, and brings higher operating efficiency, less maintenance requirements and more stable fan performance, which is beneficial to the long-term stable operation of the thermal power unit.

[0041] Example 2

[0042] Based on the air intake treatment device provided in the first embodiment above, the present application further provides a desulfurization and oxidation blower equipped with the air intake treatment device, wherein the air inlet of the desulfurization and oxidation blower is connected to the air outlet pipe of the air intake treatment device.

[0043] The fan equipped with this air intake treatment device can adapt to adverse air conditions. The two-stage filtration reduces the risk of the filter system being blocked, thereby reducing the frequency of frequent replacement and maintenance. The two-stage filtration does not affect each other, and there is no need to shut down the machine for replacement and maintenance. Furthermore, after adopting the two-stage filtration, the filter cotton at the fan air inlet can be replaced directly without shutting down the machine, and the service life of the filter cotton is extended. In addition, the application of the roller filter further reduces the frequency of manual maintenance and replacement, ensuring that the filter is always in a good filtering state, reducing the maintenance requirements of the device, ensuring the stability of the fan performance, and being conducive to the long-term stable operation of the thermal power unit.

[0044] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0045] The present application has been described in a relatively specific and detailed manner through general explanations and specific embodiments. It should be understood that, based on the technical concept of the present application, several conventional adjustments or further innovations may be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present application, the technical solutions obtained by such conventional adjustments or further innovations also fall within the scope of protection of the claims of the present application.

Claims

1. An air intake processing device, characterized in that: It includes an air inlet room, in which a first air filter chamber and a second air filter chamber are formed, a mounting hole is provided on the side wall of the first air filter chamber, a roller filter is installed in the mounting hole, the first air filter chamber and the second air filter chamber are in gas communication through the roller filter, a first air inlet connected to the outside is also provided on the side wall of the first air filter chamber, a debris filtering component is provided at the first air inlet, a secondary fine filter is provided in the second air filter chamber, an air outlet pipe is provided at the air outlet of the secondary fine filter, the air outlet pipe passes through the end of the second air filter chamber to form a connection port adapted to the air inlet of the desulfurization oxidation blower.

2. The air intake processing device according to claim 1, characterized in that: An inspection door for inspecting the rolling filter is installed on the side wall of the first air filter chamber, and an inspection door for inspecting the secondary fine filter is installed on the side wall of the second air filter chamber.

3. The air intake processing device according to claim 1, characterized in that: The air intake room is a rectangular box-type structure. A partition wall is provided in the air intake room. The partition wall divides the air intake room into a first air filter room and a second air filter room. The rolling filter is installed on the partition wall.

4. The air intake processing device according to claim 1, characterized in that: The first air inlet is arranged opposite to the rolling filter, and the debris filtering component includes a shutter installed at the first air inlet.

5. The air intake processing device according to claim 1, characterized in that: The secondary fine filter is a plate filter, a pleated filter, a bag filter or a box filter, and the secondary fine filter is a G4 grade filter.

6. The air intake processing device according to claim 1, characterized in that: A through hole is provided on the top of the second air filter chamber to allow the air outlet pipe to pass through.

7. A fan equipped with the air inlet processing device according to any one of claims 1 to 6, characterized in that: The fan is a desulfurization and oxidation fan, and the air inlet of the fan is connected to the air outlet pipe of the air inlet processing device.

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