A composite cylinder type pre-filter

Abstract

The application discloses a composite cylinder type pre-filter in the technical field of air filtering and separating, and aims to solve the problems of complicated installation and inconvenient maintenance of a traditional bag type filter in the prior art. The pre-filter comprises a bellows for passing a gas to be treated, the inside of the bellows is provided with a first partition plate and a second partition plate, the first partition plate and the second partition plate are used for dividing the inside of the bellows into a first chamber, a second chamber and a third chamber, the second chamber is located between the first chamber and the third chamber, a plurality of first cylinder type filters and a plurality of second cylinder type filters are arranged in the second chamber, and a plurality of third cylinder type filters are arranged in the third chamber. The pre-filter is used in pre-filtering operation of organic waste gas treatment, the number content of filters of various specifications can be flexibly configured to improve the average service life of the pre-filter, the pre-filter is easier to maintain and install than the traditional bag type filter, and the pre-filter is favorable for guaranteeing equipment power consumption and reducing equipment application and maintenance cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a composite cylinder type pre-filter, belonging to the technical field of air filtration and particle separation. BACKGROUND

[0002] In the treatment system of organic waste gas by using zeolite rotary, a pre-filter (such as a traditional bag filter) is needed to pretreat and adsorb the waste gas, so as to prolong the service life of the zeolite rotary system. In order to enhance the filter area, the bag filter is usually designed with multiple flat bag opening structures for sealing on a support, and multiple groups are arranged in the wind direction in the air bellow. Meanwhile, the bag filter is supported by a support structure to avoid mutual extrusion and diffusion between the bags, which affects the filter area. First of all, the manufacturing method of the bag is relatively complicated, and there are a large number of sealing designs between a large number of bags. If any part is damaged or poorly sealed, it is easy to cause excessive wind pressure and filter failure. In addition, in the wind direction, the bag filter is divided into three specifications of coarse filter, medium filter and fine filter. Due to the influence of the cross-sectional configuration, after the coarse filter at the front end position, there is basically no large particle at the rear end. Therefore, it is required that each filter level uses a cross section of an air bellow for filtering. However, due to the different proportions of particles in different scenarios, it is easy to cause the particles in a certain particle size range to quickly block the corresponding filter layer (compared to other filter layers). This way causes the other bag filters to be affected by the filter at this position, which reduces the overall wind speed. Although there is still enough margin, the overall invalid power consumption of the equipment increases rapidly, which affects the efficiency of the device and shortens the replacement cycle of the overall filter. Although the other position layer filter does not reach the service life, it also needs to be replaced, which also leads to the increase of replacement cost. SUMMARY

[0003] The present application aims to overcome the deficiencies in the prior art and provide a composite cylinder type pre-filter for pre-filtering of organic waste gas treatment. The number of filters of each specification can be flexibly configured to improve the average service life of the pre-filter. Compared with the traditional bag filter, it is easier to maintain and install, which is beneficial to protect the equipment power consumption and reduce the equipment application and maintenance cost.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0005] The application provides a composite cylinder type pre-filter, which comprises a bellows for passing the gas to be treated, a first partition plate and a second partition plate are arranged in the bellows, the first partition plate and the second partition plate are used for dividing the bellows into a first chamber, a second chamber and a third chamber, one of the chambers is communicated with an air inlet, a zeolite runner is arranged in the third chamber, the second chamber is arranged between the first chamber and the third chamber, a primary filter plate assembly is arranged in the first chamber, the primary filter plate assembly is used for dividing the first chamber into a pre-filter space and a post-filter space, a plurality of first cylinder type filters and a plurality of second cylinder type filters are arranged in the second chamber, the inner cavities of the plurality of first cylinder type filters are communicated with the post-filter space through communication pipes, a plurality of third cylinder type filters are arranged in the third chamber, the inner cavities of the plurality of third cylinder type filters are communicated with the inner cavities of the plurality of second cylinder type filters, each of the cylinder type filters is composed of an inner support net, a fiber filter layer and an outer support net, and the arrangement density of the fiber filter layers in the first cylinder type filters, the second cylinder type filters and the third cylinder type filters increases in sequence.

[0006] Specifically, a transfer air chamber is arranged outside the bellows, and a plurality of communication pipes are arranged on the transfer air chamber and communicated with the inner cavities of the plurality of second cylinder type filters and the inner cavities of the plurality of third cylinder type filters.

[0007] Specifically, a return air system is arranged on the third chamber in communication, the hot air system of the zeolite runner is not communicated with the inner cavity of the third chamber, and a flow sensor and an electromagnetic valve are arranged on each of the communication pipes.

[0008] Specifically, a plurality of hollow column type quick-release positioning sleeves are arranged at the bottom of the bellows, and the first cylinder type filters, the second cylinder type filters and the third cylinder type filters can be installed in the corresponding chambers through the quick-release positioning sleeves.

[0009] Specifically, the bottom of each quick-release positioning sleeve is provided with a hollow pipe structure penetrating through the bottom of the bellows, and each hollow pipe arranged below the bellows is provided with a discharge valve.

[0010] Specifically, a horizontal air blowing chamber is arranged on one side below the bellows, the horizontal air blowing chamber is in a flat hollow structure and is communicated with the bottom layer position of the second chamber or the third chamber of the bellows, a plurality of fans for supplying air to the horizontal air blowing chamber are arranged on the horizontal air blowing chamber, and a sewage discharge opening capable of being opened is arranged on the side of the bellows opposite to the horizontal air blowing chamber.

[0011] Specifically, the front filter space is provided with a plurality of low-temperature filter screens, the top of the air bellow is provided with a cooling liquid tank, the top end of the low-temperature filter screen is inserted into the gap at the bottom of the cooling liquid tank, the bottom of the low-temperature filter screen is provided with a liquid return tray, the liquid inlet pipeline of the cooling water machine is connected with the liquid return tray, and the liquid outlet pipeline of the cooling water machine is connected with the cooling liquid tank.

[0012] Specifically, the downstream position of the low-temperature filter screen is provided with a mounting strip, a plurality of V-shaped baffles are arranged on the mounting strip in the vertical direction and transversely connected to the two sides of the air bellow, a liquid leakage groove is arranged at the bottom end of each V-shaped baffle, and the uppermost position of the end of the V-shaped baffle away from the low-temperature filter screen is higher than the bottom end position of the V-shaped baffle above it.

[0013] Specifically, the mesh of the low-temperature filter screen is in a rhombus shape, and the connecting line of the upper and lower two corner points of the rhombus-shaped mesh is in a vertical state.

[0014] Specifically, the lower end position of the discharge valve of the first and third cylinder type filters is also connected with a vacuum device.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The present application is designed by special design of the cylinder type filter, which can correspond to the filtering of particles of different size and can be configured in the specially designed air bellow according to the specifications, so that each cylinder type filter can work together to realize the rough and fine filtration of the contaminated particles, and the number of filters can be freely configured according to the specific gravity of the pollutant particles, so as to avoid the problem that the local filter is quickly blocked, the wind speed of the whole device is affected, the power consumption of the device is increased, but the processing air volume is still low; the wind speed is balanced by balancing the number of filters, so that the wind speed can be optimized within a certain use cycle, thereby reducing the energy consumption of the device; in addition, the setting of the cylinder type filter is also easier to install and clean than the bag type dust collector, and can be conveniently maintained, replaced or other back flushing actions.

[0017] The present application is designed by special design of the cylinder type filter, which can correspond to the filtering of particles of different size and can be configured in the specially designed air bellow according to the specifications, so that each cylinder type filter can work together to realize the rough and fine filtration of the contaminated particles, and the number of filters can be freely configured according to the specific gravity of the pollutant particles, so as to avoid the problem that the local filter is quickly blocked, the wind speed of the whole device is affected, the power consumption of the device is increased, but the processing air volume is still low; the wind speed is balanced by balancing the number of filters, so that the wind speed can be optimized within a certain use cycle, thereby reducing the energy consumption of the device; in addition, the setting of the cylinder type filter is also easier to install and clean than the bag type dust collector, and can be conveniently maintained, replaced or other back flushing actions. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the overall structure schematic diagram of the front filter provided by the embodiment of the present application;

[0019] Figure 2 is the pre-filter provided by the present application Figure 1 is an enlarged view of structure A of the pre-filter provided by the present application;

[0020] Figure 3 is a schematic view of internal partial structure of the pre-filter provided by the present application;

[0021] Figure 4 is the pre-filter provided by the present application Figure 3 is an enlarged view of structure B of the pre-filter provided by the present application;

[0022] Figure 5 is a side view of the pre-filter provided by the present application;

[0023] Figure 6 is the pre-filter provided by the present application Figure 5 is a C-C direction sectional view of the pre-filter provided by the present application;

[0024] Figure 7 is the pre-filter provided by the present application Figure 6 is an enlarged view of structure D of the pre-filter provided by the present application;

[0025] Figure 8 is the pre-filter provided by the present application Figure 6 is an enlarged view of structure E of the pre-filter provided by the present application;

[0026] Fig. 1 is a wind box; Fig. 2 is a second partition plate; Fig. 3 is a first partition plate; Fig. 4 is a first cylinder filter; Fig. 5 is a second cylinder filter; Fig. 6 is a third cylinder filter; Fig. 7 is a liquid return tray; Fig. 8 is a primary filter plate assembly; Fig. 9 is a communication pipe; Fig. 10 is a transfer air chamber; Fig. 11 is a mounting strip; Fig. 12 is a low temperature filter screen; Fig. 13 is a cooling liquid tank; Fig. 14 is a V-shaped baffle; Fig. 15 is a water chiller; Fig. 16 is a quick release positioning sleeve; Fig. 17 is a discharge valve; Fig. 18 is a horizontal blowing air chamber; and Fig. 19 is a fan. DETAILED DESCRIPTION

[0027] The present application will be further described below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0028] In the description of the present application, it is to be understood by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0029] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances. Embodiment one

[0030] The composite cylinder type pre-filter provided by the embodiment of the present application is used in the pre-filtering operation of organic waste gas treatment, and the number content of each specification filter can be flexibly configured to improve the average service life of the pre-filter. Compared with the traditional bag filter, it is easier to maintain and install, which is conducive to protecting the equipment power consumption, reducing the equipment application and maintenance cost. In order to realize the structure and function of the device, the configuration device includes a bellows 1 for passing the gas to be treated, and according to Figure 6As shown, the first partition plate 3 and the second partition plate 2 are arranged in the interior of the wind box 1, and the first partition plate 3 and the second partition plate 2 are used to divide the interior of the wind box 1 into a first chamber, a second chamber and a third chamber, one of which is communicated with the air inlet, and the zeolite runner is arranged in the third chamber, the second chamber is located between the first chamber and the third chamber, the first chamber is provided with a primary filter plate assembly 8 for pretreating the exhaust gas, and the primary filter plate assembly 8 is used to divide the first chamber into a pre-filtering space and a post-filtering space, at this time, a plurality of first cylinder filters 4 and a plurality of second cylinder filters 5 are arranged in the second chamber, and the inner cavities of the plurality of first cylinder filters 4 are communicated with the post-filtering space through the communication pipe 9, a plurality of third cylinder filters 6 are arranged in the third chamber, and the inner cavities of the plurality of third cylinder filters 6 are communicated with the inner cavities of the plurality of second cylinder filters 5, so as to form a stable gas filtering channel, under the arrangement of the channel, the gas to be treated will first pass through the primary filter plate assembly 8, and then enter the first cylinder filter 4, the first cylinder filter 4 filters the gas from inside to outside, and the blown gas enters the second cylinder filter 5 in the second chamber, at this time, the second cylinder filter 5 filters the impurities from outside to inside, and is finally guided into the third cylinder filter 6 through the communication effect, and the third cylinder filter 6 realizes the filtration from inside to outside again, the three filters are arranged in sequence and are respectively used to filter impurity particles with particle sizes greater than 5um, 1-5um and 0.3-1um, therefore, each cylinder filter is composed of an internal support net, a fiber filter layer and an external support net, and the filtering level is divided by the tightness of the fiber filter layer, and the material can be glass fiber or composite non-woven fabric, at this time, the arrangement density of the fiber filter layer in the first cylinder filter 4, the second cylinder filter 5 and the third cylinder filter 6 increases in turn, in order to ensure that the adsorption surface of the zeolite runner can uniformly adsorb the gas containing organic matter and ensure the effective utilization rate of the surface of the zeolite runner, the third cylinder filter 6 should be uniformly distributed in the interior of the third chamber and only be arranged for the gas to flow from inside to outside, through this flow mode, the gas can be uniformly diffused in the internal space of the third chamber, avoiding the local uneven diffusion of the gas to cause the adsorption efficiency of other positions of the zeolite runner to decrease. In the above arrangement mode, the newly designed cylinder filter makes the equipment realize normal filtering function without needing a bag filter, the cylinder filter is more convenient to disassemble and assemble than the bag filter, has a stable support structure that the bag filter does not have, is more conducive to back blowing, and can be freely arranged in a corresponding number according to the demand compared with the bag filter, so as to realize multi-stage filtering while reducing the situation that the actual working efficiency of the equipment is affected by the rapid blocking of part of the filters, and is also conducive to ensuring that each filter reaches the replacement service life at the same time, thereby reducing the replacement and maintenance cost.The device is designed by the position of the partition plate, so that the first cylinder filter 4 and the second cylinder filter 5 can realize two different levels of filtration in one chamber, which can effectively shorten the floor area of the equipment, thereby reducing the production and maintenance cost of the equipment.

[0031] The composite cylinder pre-filter provided by the embodiment of the application can effectively reduce the difference between the air flow and the filtering effect of the third cylinder filter 6.

[0032] The composite cylinder pre-filter provided by the embodiment of the application can effectively reduce the difference between the air flow and the filtering effect of the third cylinder filter 6. Figure 3The vertical direction setting cylinder filter shown, the dust blown will accumulate in the bottom position of the cavity of the bellows 1, the dust is not easy to reattach to the surface of the cylinder filter, and the dust will not re-enter the bag inside like the bag type dust collector, so it has good timeliness for the reverse dust cleaning of the equipment, which can greatly prolong the maintenance period, for this purpose, a return air system (not shown in the figure) is provided on the third chamber, the zeolite runner hot air system is not connected with the inner cavity of the third chamber, and the reverse blowing is carried out in the bellows 1 through the return air system, so that the airflow flows reversely to realize the reverse passing of the airflow, and the reverse cleaning action of the attached impurities is realized. In order to monitor the energy efficiency of each cylinder filter, a flow sensor and an electromagnetic valve (not shown in the figure) can be arranged on each communication pipe 9. This structure can be applied in the reverse blowing system at the same time. Because when the whole pipeline is reversed, the gas will preferentially pass through the position that has been blown out (the resistance of reverse flow is small), so that other blocked positions cannot be well reversed. At this time, by adjusting the opening and closing of the electromagnetic valve, only the local cylinder filter can pass through the gas during the reverse blowing process, which increases the gas pressure of this part of the filter, thereby helping to perform comprehensive reverse blowing action on the corresponding cylinder filter and improving the reverse blowing effect. At this time, the flow sensor is used to judge the blocking condition, so as to provide a corresponding standard basis for whether the reverse blowing action is completed.

[0033] The composite cylinder filter provided by the embodiment of the application is convenient and fast to install the cylinder filter. A plurality of hollow column quick-release positioning sleeves 16 are arranged at the bottom of the bellows 1. Figure 8 As shown, the first cylinder filter 4, the second cylinder filter 5 and the third cylinder filter 6 can be installed in the corresponding chambers through the quick-release positioning sleeves 16. The support net plate structure outside the filter is used for clamping and closed installation, which can provide corresponding support and quickly position and install different cylinder filters, and is also beneficial to disassemble the cylinder filter.

[0034] The composite cylinder type pre-filter provided by the embodiment of the present application considers that the hollow pipe structure is arranged at the bottom of each quick-release positioning sleeve 16 to facilitate the cleaning of the dust accumulated in the pipeline during back blowing, the inner cavity of the cylinder type filter is in communication with the hollow pipe structure, each hollow pipe structure penetrates the bottom of the bellow 1, and each hollow pipe below the bellow 1 is provided with an exhaust valve 17, the wind direction of the first cylinder type filter 4 and the third cylinder type filter 6 is back blown, which causes the particles in the interior to be easily accumulated at the bottom of the pipeline, and the dust particles are easily entrained and fall in the interior of the second cylinder type filter 5 when the third cylinder type filter 6 is back blown, so that the second cylinder type filter 5 also needs to be cleaned regularly, but the ash content is obviously reduced and is easily diffused in the second chamber, so that the maintenance frequency can be lower than that of the first cylinder type filter 4 and the third cylinder type filter 6.

[0035] The composite cylinder type pre-filter provided by the embodiment of the present application, in the second chamber and the third chamber, especially in the second chamber, the dust is easily accumulated at the bottom of the chamber to form an accumulation state, in order to facilitate the removal of the dust at the bottom, a horizontal blowing chamber 18 is arranged on one side below the bellow 1, as shown in Figure 2 The horizontal blowing chamber 18 is configured in a flat hollow structure, is in communication with the bottom layer position of the second chamber or the third chamber of the bellow 1, and is further provided with a plurality of fans 19 for supplying air to the horizontal blowing chamber 18, the size of the air outlet can be collected by the collection plate structure, so that the high-pressure gas is blown out, so that the horizontal blowing chamber 18 can supply the blowing force to the dust accumulated at the bottom of the interior of the bellow 1, and in order to guide the dust out, a blow-off opening capable of being opened is arranged on the side of the bellow 1 opposite to the horizontal blowing chamber 18, in some other embodiments, a spraying and settling container and the like can be arranged at the position of the blow-off opening to avoid the secondary pollution of the pollutants to the air.

[0036] The composite cylinder type pre-filter provided by the embodiment of the present application considers that the hollow pipe structure is arranged at the bottom of each quick-release positioning sleeve 16 to facilitate the cleaning of the dust accumulated in the pipeline during back blowing, the inner cavity of the cylinder type filter is in communication with the hollow pipe structure, each hollow pipe structure penetrates the bottom of the bellow 1, and each hollow pipe below the bellow 1 is provided with an exhaust valve 17, the wind direction of the first cylinder type filter 4 and the third cylinder type filter 6 is back blown, which causes the particles in the interior to be easily accumulated at the bottom of the pipeline, and the dust particles are easily entrained and fall in the interior of the second cylinder type filter 5 when the third cylinder type filter 6 is back blown, so that the second cylinder type filter 5 also needs to be cleaned regularly, but the ash content is obviously reduced and is easily diffused in the second chamber, so that the maintenance frequency can be lower than that of the first cylinder type filter 4 and the third cylinder type filter 6. Figure 6 and Figure 7The low-temperature filter screen 12 is arranged in the pre-filter space in a manner of several layers, and a cooling liquid tank 13 is arranged at the top of the air bellow 1, the top end of the low-temperature filter screen 12 is inserted into the gap arranged at the bottom of the cooling liquid tank 13, so that the cooling liquid in the cooling liquid tank 13 can be guided by the low-temperature filter screen 12 and attached to the surface of the low-temperature filter screen 12, the low-temperature filter screen 12 is cooled by real-time water flow, and when the air passes through the screen plate, the air is in contact with the attached water flow and the low-temperature screen plate, so that heat exchange and cooling are realized, so that the gas can be cooled efficiently without water mist, and the small occupation area is conducive to reducing the equipment space, in some embodiments, the cooling liquid can be a solution with a high boiling point, such as ethylene glycol, propylene glycol or glycerol, according to the temperature requirement of the gas, so as to avoid the cooling liquid being brought into the air due to the vaporization of the cooling liquid caused by the high-temperature gas, and the liquid blockage of the filter screen caused by the pre-cooling of the cylindrical filter, in order to realize the circulation of the cooling liquid, a liquid return tray 7 can be arranged at the bottom of the low-temperature filter screen 12, the liquid inlet pipeline of the cold water machine 15 is connected with the liquid return tray 7, the liquid outlet pipeline of the cold water machine 15 is connected with the cooling liquid tank 13, so that the cooling liquid is circulated to cool the gas, and the organic matter attached to the low-temperature gas is also conducive to the adsorption of the zeolite wheel.

[0037] The composite cylindrical pre-filter provided by the embodiment of the present application can avoid the influence of wind speed on the water droplets attached to the low-temperature filter screen 12, so that the water droplets are blown out and splash to affect the normal use of the primary filter plate assembly 8, therefore, a mounting strip 11 can be arranged at the downstream position of the low-temperature filter screen 12, and the mounting strip 11 is arranged to be in contact with the low-temperature filter screen 12, so that the water droplets attached to the low-temperature filter screen 12 are blown to the mounting strip 11, and the water droplets are prevented from splashing to the primary filter plate assembly 8. Figure 7As shown, a plurality of V-shaped baffles 14 are arranged on the mounting strip 11 in the vertical direction and are connected transversely on both sides inside the wind box 1, and a liquid leakage groove is arranged at the position of the folded corner of the bottom end of each V-shaped baffle 14, so that when the liquid droplets are blown out due to high layout wind speed, the liquid droplets can be intercepted by the V-shaped baffle 14, in order to avoid missing interception, the uppermost position of the end of the V-shaped baffle 14 away from the low-temperature filter screen 12 is higher than the bottommost position of the V-shaped baffle 14 above it, through this setting mode, the intercepted liquid droplets will fall in the V-shaped baffle 14 and finally leak out of the liquid leakage groove, so that it can be avoided to splash on the primary filter plate assembly 8 to affect its normal use.

[0038] In some other embodiments, in order to enable the low-temperature filter screen 12 to uniformly and accurately drain from top to bottom, ensure a large enough cooling surface, and enable the liquid to be uniformly distributed at different positions of the screen body structure for cooling, and ensure maximum energy utilization, the mesh of the low-temperature filter screen 12 can be configured in a diamond shape, and the connecting line of the upper and lower corner points of the diamond-shaped mesh is in a relative vertical state. In this mode, the liquid will relatively uniformly diffuse to both sides when encountering the corner point position above the mesh during the falling process, the liquid has better flow and diffusion properties, and the liquid is less likely to encounter sudden resistance and directly fall down during the falling process, and has better ability to adhere to the screen plate structure.

[0039] In some other embodiments, in order to efficiently clean or accurately backflush the impurities inside the first cylindrical filter 4 and the third cylindrical filter 6, in addition to the corresponding flow sensor and electromagnetic valve arranged on the communication pipe 9, a vacuum device (which can also be configured to be opened and closed by driving the corresponding electromagnetic valve) is also connected and arranged at the lower end position of the corresponding discharge valve 17. In combination with the above-mentioned electromagnetic valve located on the communication pipe 9, the backflushing effect of the corresponding pipeline is realized by using the vacuumizing effect, and the dust wrapped by the backflushed gas is directly extracted by the vacuum device, avoiding the tedious situation of secondary dust cleaning. Embodiment two

[0040] The pre-filtering method provided by the embodiment of the present application can reasonably configure the filter according to the types of the polluted gas of the customer, and aims to solve the problem that the service life of the corresponding filter layer is quickly reached compared with other filter layers due to the excessive concentration of a certain particle. The method comprises the following steps:

[0041] Three cylindrical filters of different specifications are prepared, the arrangement density of different fiber filter layers is used to enable them to filter polluted particles with particle sizes greater than 5 um, between 1-5 um and between 0.3-1 um, respectively, and the net structure is used to coat and stabilize the cylindrical structure;

[0042] The particle size ratio of the particle size greater than 5um, between 1-5um and 0.3-1um in the exhaust gas discharged from the construction site is detected;

[0043] According to the proportion of the pollutant particles in the construction site, the three different specifications of the cylinder filter are configured in a corresponding number ratio according to the mass ratio of the particle size;

[0044] The pre-filter is assembled according to the configuration mode of the pre-filter in any one of the embodiments, and the assembled device is put into use for filtering;

[0045] The composite cylinder filter is regularly maintained and replaced.

[0046] Through the configuration of the above method, the proportion of various different particle impurities can be determined according to the type of the polluted gas produced by the customer, and the service life of the corresponding filter layer under the corresponding area can be estimated (the specific estimation method is not limited here). By changing the number of cylinder filters to change the filtering area, the service life is adjusted, which is conducive to its application in various pre-filter systems, guarantees the service life of each filter level, can replace all filter layers at one time without causing waste of filter layers, can save costs, and avoid situations such as serious blockage of individual filter layers, affecting the processing wind speed, increasing the energy consumption of the equipment, etc.

[0047] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A composite cylindrical pre-filter, characterized in that, The system includes a bellows (1) for supplying gas to be treated. The bellows (1) has a first partition plate (3) and a second partition plate (2) inside. The first partition plate (3) and the second partition plate (2) divide the bellows (1) into a first chamber, a second chamber, and a third chamber. One chamber is connected to an air inlet. The third chamber contains a zeolite rotor. The second chamber is located between the first and third chambers. The first chamber contains a primary filter assembly (8), which divides the first chamber into a pre-filter space and a post-filter space. The second chamber contains multiple first cylinders. The first cylindrical filter (4) and a plurality of second cylindrical filters (5) are provided in the third chamber. The inner cavities of the plurality of first cylindrical filters (4) are connected to the post-filter space through a connecting pipe (9). The third chamber is provided with a plurality of third cylindrical filters (6). The inner cavities of the plurality of third cylindrical filters (6) are connected to the inner cavities of the plurality of second cylindrical filters (5). Each cylindrical filter is composed of an internal support mesh, a fiber filter layer and an external support mesh. The arrangement density of the fiber filter layer inside the first cylindrical filter (4), the second cylindrical filter (5) and the third cylindrical filter (6) increases sequentially. The air box (1) is provided with a transfer air chamber (10) on the outside. The transfer air chamber (10) is provided with multiple connecting pipes (9) that are respectively connected to the inner cavity of multiple second cylindrical filters (5) and the inner cavity of third cylindrical filters (6). The third chamber is connected to a return air system, and each of the connecting pipes (9) is equipped with a flow sensor and a solenoid valve; It also includes a chiller (15), the pre-filter space is provided with several layers of low temperature filter screens (12), the top of the air box (1) is provided with a coolant tank (13), the top of the low temperature filter screen (12) is inserted into the gap at the bottom of the coolant tank (13), the bottom of the low temperature filter screen (12) is provided with a return tray (7), the inlet pipe of the chiller (15) is connected to the return tray (7), and the outlet pipe of the chiller (15) is connected to the coolant tank (13); A mounting strip (11) is provided downstream of the low-temperature filter (12). Multiple V-shaped baffles (14) are arranged vertically on the mounting strip (11) and are horizontally connected to both sides of the inside of the wind box (1). Each V-shaped baffle (14) has a leakage groove at the corner of its bottom end. The uppermost position of the end of the V-shaped baffle (14) away from the low-temperature filter (12) is higher than the bottommost position of the V-shaped baffle (14) above it.

2. The composite cylindrical pre-filter according to claim 1, characterized in that, The hot air system of the zeolite rotor is not connected to the inner cavity of the third chamber.

3. A composite cylindrical pre-filter according to claim 1, characterized in that, The bottom of the air box (1) is provided with multiple hollow cylindrical quick-release positioning sleeves (16), and the first cylindrical filter (4), the second cylindrical filter (5) and the third cylindrical filter (6) can all be installed in the corresponding chambers through the quick-release positioning sleeves (16).

4. A composite cylindrical pre-filter according to claim 3, characterized in that, The bottom of each of the quick-release positioning sleeves (16) is configured as a hollow tube structure and the hollow tube structure penetrates the bottom of the air box (1). Each hollow tube located below the air box (1) is provided with a discharge valve (17).

5. A composite cylindrical pre-filter according to claim 4, characterized in that, A horizontal blowing chamber (18) is provided on one side below the air box (1). The horizontal blowing chamber (18) has a flat hollow structure and is connected to the bottom of the second or third chamber of the air box (1). Several fans (19) for supplying air to the horizontal blowing chamber (18) are also provided on the horizontal blowing chamber (18). A drain port that can be opened is provided on the side of the air box (1) opposite to the horizontal blowing chamber (18).

6. A composite cylindrical pre-filter according to claim 5, characterized in that, The low-temperature filter (12) has a rhomboid mesh, wherein the line connecting the upper and lower corners of the rhomboid mesh is vertical.

7. A composite cylindrical pre-filter according to claim 6, characterized in that, A vacuum device is also connected to the lower end of the discharge valve (17) of the first cylindrical filter (4) and the third cylindrical filter (6).

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