Small-size and low-consumption fine filtration dust remover

Abstract

The utility model relates to a fine filtration dust remover with small volume and low consumption in the field of dust removal equipment, which comprises at least two cylinders arranged in parallel, two layers of filters are arranged in the cylinders, the lower layer is a coarse filtration filter, the upper layer is a fine filtration filter, the pre-filtration cavities of the cylinders are transversely connected, and the post-filtration cavities of the cylinders are transversely connected. A settling cylinder is arranged below each cylinder body, and an ash outlet is formed in the bottom of each settling cylinder; the cylinder on one side is connected with an air inlet header pipe which is connected with the pre-filtering cavity; and an air outlet header pipe is connected to the cylinder body on the other side and is connected with the post-filtration cavity. According to the device, the plurality of barrels are arranged in parallel, so that the number of the barrels can be adjusted according to the requirement of the treatment air volume, and the treatment requirements of different air volumes can be met. The arrangement number of the cylinders is flexible, the cylinders have universality, the structure is compact, and the manufacturing cost is low. The device can be used for dust removal of various industrial dust-containing gases, and is particularly suitable for a dust removal system for waste heat recovery of dried waste gas.

Description

Technical Field

[0001] The utility model relates to a dust removal device, in particular to a gaseous fluid dust collector. Background Art

[0002] Existing various industrial dust removal systems are mainly composed of a dust house and a bag low-consumption fine filter dust collector connected in series. The dust house plays a role in settling large-particle dust with a special structure of the internal air duct, and the bag low-consumption fine filter dust collector plays a fine filtering role to filter fine dust. There are also existing technologies that are composed of other coarse filter dust collectors and other fine filter dust collectors connected in series.

[0003] For solid powdery materials such as industrial solid powdery materials and waste heat gases after drying of fruits, vegetables, tea, etc. in a dryer, the waste heat needs to be recovered. However, the waste heat gases contain a large amount of fine particulate dust, which will quickly make the heat absorption fins of the evaporator in the heat pump system covered with dust, greatly reducing the efficiency of the heat pump system. Most existing technologies use a dust house as primary dust removal, and then use a bag type fine filter dust collector for fine dust removal. Its disadvantages are as follows: Since both the dust house and the bag type fine filter dust collector are large in volume, the dust removal system composed of other existing coarse filter dust collectors and other fine filter dust collectors connected in series is also large in volume. Therefore, the heat dissipation area is large, the heat loss is large, and the waste heat loss of the waste heat gases after drying in the dryer is large, so the waste heat utilization efficiency is not high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a fine filter dust collector with small volume and low consumption, and finally achieve a fine filtering effect. It has a small individual volume, a small surface area, small heat dissipation, less consumables and less working hours during operation, so the operation cost is low, and it can be mass-produced in a standardized manner. When applied in a drying system, its waste heat recovery efficiency is high.

[0005] The purpose of the utility model is realized as follows: A fine filter dust collector with small volume and low consumption includes at least two cylinders arranged in parallel. A two-layer filter is provided inside the cylinder. The lower layer is a coarse filter, and the upper layer is a fine filter. The two-layer filter divides the space inside the cylinder into a pre-filter cavity at the lower part and a post-filter cavity at the upper part. The pre-filter cavities of each cylinder are connected horizontally through interfaces, and the post-filter cavities of each cylinder are connected horizontally through interfaces. A settling cylinder is provided below each cylinder, and an ash outlet is provided at the bottom of the settling cylinder; An air inlet main pipe is connected to the cylinder at the frontmost end, and the air inlet main pipe is connected to the front interface of the pre-filter cavity of the frontmost cylinder; An air outlet main pipe is connected to the cylinder at the rearmost end, and the air outlet main pipe is connected to the rear interface of the post-filter cavity of the rearmost cylinder. The front interface of the post-filter cavity of the frontmost cylinder is closed by a front sealing plate, and the rear interface of the pre-filter cavity of the cylinder at the rearmost end is closed by a rear sealing plate.

[0006] When the utility model works, the dusty gas enters from the main air inlet pipe. A part of it flows horizontally into the pre-filter cavity in the adjacent cylinder body, and another part sequentially passes through the coarse filter and the fine filter upward and enters the post-filter cavity. The clean air after dust removal converges to the main air outlet pipe and then leaves. The large-particle dust accumulated on the coarse filter can be made to fall into the settling cylinder by means of air blowing, flushing, vibration, etc., and discharged from the ash outlet. When it is used in the drying system, the clean air with a large amount of waste heat can be allowed to enter the evaporator of the heat pump system for high-efficiency waste heat recovery. When it is used only as a pure dust collector, the air can be discharged into the atmosphere after meeting the national emission standards. The utility model adopts at least two cylinders arranged in parallel. No matter how many cylinders are arranged in parallel, the flow path lengths of each air flow passing through each filter in each cylinder, that is, the flow channel lengths, are basically equal. Therefore, it is called the same-way layout method. The flow resistance of each filter is automatically balanced and equal, and the degree of blockage is similar, which is convenient for adopting the same cycle to carry out regeneration treatment or renewal and scrapping in turn, and the utilization efficiency of components can be optimized. Its individual volume is small, the surface area is small, the heat dissipation is small, the consumables are less and the working hours are less during operation, so the operation cost is low, and it can be mass-produced in a standardized manner. This device can be used for gaseous fluid dust removal.

[0007] A further improvement of the utility model lies in that the cylinder body is a unit component with the same structure, and the interfaces are respectively arranged on both sides of the pre-filter cavity and both sides of the post-filter cavity. The corresponding front interfaces and rear interfaces of adjacent cylinders are directly connected horizontally in the horizontal direction. The above structure makes all cylinder bodies become standardized general components, and the number of cylinder bodies can be increased or decreased to adapt to the actual requirements of different hourly air treatment volumes, and they can be assembled into different specifications. This is convenient for standardized mass production. The production output of the same equipment factory is high and the production cost is greatly reduced.

[0008] Furthermore, in order to facilitate the replacement of the filter, a side door for taking and placing the filter is opened on the cylinder body.

[0009] Furthermore, an anti-blowing air port for compressing air to the coarse filter is arranged between the coarse filter and the fine filter, and the anti-blowing air port is connected to a compressed air source.

[0010] When the dusty gas passes through the lower - layer coarse - filter filter, a large amount of dust is intercepted on the lower side of the coarse - filter filter. When the dust accumulates to a certain amount in the filter pores, during operation, the coarse - filter filters in different areas can be cleaned quickly and reversely by compressed - air nozzles without shutting down the machine. Some of the dust blocking the filter pores is blown away, enabling the filter to be regenerated and restored to an efficient filtering state. The dust is blown into the settling cylinder and then leaves the device from the ash outlet. When the blocked dust in the filter pores of the coarse - filter filter reaches a certain degree and cannot be completely blown out by compressed - air back - blowing, the spare coarse - filter filter can be quickly replaced through the side door of the cylinder body set on one side of the cylinder. The replaced coarse - filter filter is washed with water and then reserved for standby until it is completely scrapped after several months of operation of the dust collector.

[0011] Further, the interfaces between adjacent cylinders are connected by square - shaped flange interfaces. The interfaces between adjacent cylinders can also be connected by plug - in methods.

[0012] Further, the coarse - filter filter is a polyester - fiber folded filter, and the fine - filter filter is a V - type ultra - fine glass - fiber paper combined filter. The polyester - fiber folded filter and the V - type ultra - fine glass - fiber paper combined filter can be obtained commercially.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By arranging multiple cylinders in parallel, the device can adjust the number of cylinders according to the requirements of different treatment air volumes, so that it can be arbitrarily assembled to adapt to various different specifications for different air - volume treatment requirements. Each cylinder can be mass - produced standardly, and none of the cylinders is non - standard, with high production efficiency and low production cost.

[0015] 2. The replacement of filter components is quick and convenient, and the maintenance man - hours are low.

[0016] 3. The consumables during operation are low, and the operation cost is low.

[0017] 4. The dust - removal efficiency is high. Dust with a particle size of more than 0.3 microns can be basically filtered out.

[0018] 5. The overall volume of the device is small, the surface area is small, and the heat - dissipation loss is small. Therefore, when used in a drying system, the subsequent waste - heat utilization efficiency can be greatly improved.

[0019] In short, this is a fine - filter dust collector with a smaller volume, a smaller surface area, a low heat - dissipation loss, a small floor area in the factory building, a low operation cost, a low manufacturing cost, a high dust - removal efficiency (dust with a particle size of more than 0.3 microns can be basically filtered out), and is convenient for packaging and transportation in several parts.

[0020] The utility model can be used for removing dust from the dust contained in the waste heat exhaust gas of a dryer. After dust removal, it is used for high-efficiency waste heat recovery, and effectively prevents the evaporator heat absorption fins of the heat pump system from being affected by dust coverage and affecting its operation. The high efficiency of waste heat utilization of the dust collector of the utility model cannot be achieved by various existing dust collectors. In addition to being used for removing dust from the dust-containing waste heat gas after the material is dried in the dryer and efficiently recovering heat energy, the utility model can also be used as a pure dust collector and is widely used for removing dust from various industrial dust-containing gases, dust-containing gases in the agricultural product processing process, or dust in public spaces, and is discharged into the atmosphere after fully meeting the national emission standards. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of the internal structure of the unit component.

[0023] Figure 3 It is a schematic diagram of the external structure of the unit component.

[0024] In the figure, 1 is the ash discharge port, 2 is the settling cylinder, 3 is the main air inlet pipe, 4 is the first interface before filtration, 5 is the coarse filter, 6 is the fine filter, 7 is the first interface after filtration, 8 is the front sealing plate, 9 is the cover plate, 10 is the second interface after filtration, 11 is the reverse blowing air port, 12 is the main air outlet pipe, 13 is the rear sealing plate, 14 is the second interface before filtration, 15 is the cylinder body, 16 is the side door, and 17 is the handle. Detailed Embodiment

[0025] As Figures 1-3 shown, it is a small-sized and low-consumption fine filter dust collector, including at least two cylinder bodies 15 arranged in parallel. There are two layers of filters inside the cylinder body 15. The lower layer is the coarse filter 5, and the upper layer is the fine filter 6. The top of the cylinder body 15 is provided with a cover plate 9, and the cover plate 9 is a detachable structure for easy cleaning and maintenance; the two layers of filters divide the space inside the cylinder body 15 into a pre-filtration cavity at the lower part and a post-filtration cavity at the upper part. The pre-filtration cavities of each cylinder body 15 are connected horizontally, and the post-filtration cavities of each cylinder body 15 are connected horizontally. A settling cylinder 2 is provided below each cylinder body 15, and an ash discharge port 1 is provided at the bottom of the settling cylinder 2; a main air inlet pipe 3 is connected to one side of the cylinder body 15, and the main air inlet pipe 3 is connected to the pre-filtration cavity; a main air outlet pipe 12 is connected to the other side of the cylinder body 15, and the main air outlet pipe 12 is connected to the post-filtration cavity.

[0026] The cylinder body 15 is a unit component with the same structure. Interfaces are provided on both sides of the cavity before filtration, namely the first interface before filtration 4 and the second interface before filtration 14; interfaces are also provided on both sides of the cavity after filtration, namely the first interface after filtration 7 and the second interface after filtration 10. The corresponding interfaces of the cavities before filtration of adjacent cylinder bodies 15 are transversely and matchingly connected, and the corresponding interfaces of the cavities after filtration of adjacent cylinder bodies 15 are also transversely and matchingly connected. The front interface of the cavity after filtration of the cylinder body 15 at the frontmost end is closed by the front sealing plate 8, and the rear interface of the cavity before filtration of the cylinder body 15 at the rearmost end is closed by the rear sealing plate 13.

[0027] On the cylinder body 15, side doors 16 are provided through which the coarse filter 5 and the fine filter 6 can be taken out and placed. The coarse filter 5 and the fine filter 6 are inserted and installed in the cylinder body 15 and can be directly pulled out or inserted. Handles 17 are provided on the side doors 15 to facilitate the opening and closing of the side doors 15. To ensure good sealing and support, the lower sides of the coarse filter 5 and the fine filter 6 can be supported by a hollowed-out square frame, and sealing wool strips can also be provided around for sealing.

[0028] An anti-blowing air port 11 for blowing air into the coarse filter 5 is provided between the coarse filter 5 and the fine filter 6. The anti-blowing air port 11 is connected to a compressed air source. The anti-blowing air port 11 can be a number of small holes provided on a metal pipe or an independent nozzle.

[0029] The interfaces between adjacent cylinder bodies 15 can be connected by a square flange interface or by an insertion connection method.

[0030] The coarse filter 5 is a polyester fiber folded filter, and the fine filter 6 is a V-shaped ultra-fine glass fiber paper combined filter. Dust particles larger than 5 microns in the air flow are basically removed by the polyester fiber folded filter, and the V-shaped ultra-fine glass fiber paper combined filter of the fine filter can filter almost all dust particles larger than 0.3 microns.

[0031] During operation, the dusty gas enters from the main inlet pipe 3. A part of it flows horizontally into the pre-filter cavity in the adjacent cylinder 15, and another part successively passes upward through the coarse filter 5 and the fine filter 6, enters the post-filter cavity, and then leaves from the main outlet pipe 12. When the dusty gas passes through the coarse filter, a large amount of dust is intercepted on the lower side of the polyester fiber square filter. Within several hours of operation, when the dust accumulates to a certain amount, the coarse filters in different areas, that is, the polyester fiber folded filters, are alternately regenerated to their highly efficient filtering state by reverse blowing with compressed air. The dust is then blown into the settling cylinder 2 and leaves the device from the ash outlet 1. After several days of operation, when the coarse filter 5 is severely blocked to a certain extent, the side door 16 can be opened to remove the coarse filter 5 for replacement with spare parts. The coarse filter 5 can be regenerated by flushing with water and then kept for standby. The coarse filter 5 can be washed with water multiple times and only needs to be completely replaced after several months. The side door 16 provides convenience for the regular and rapid replacement of spare parts for the coarse filter 5 and the regeneration by flushing with water (for standby). When the fine filter 6, that is, the V-shaped ultra-fine fiberglass paper combined filter, needs to be scrapped after several months of use, it is replaced by opening the top cover plate 9 of the cylinder. Of course, it can also be replaced through the side door 16 of the cylinder.

[0032] This device can be used for dust removal in drying systems and various industrial or agricultural dusty gases. It is especially suitable for recovering waste heat after dust removal from an air stream containing a large amount of waste heat. It not only recovers a large amount of waste heat but also prevents the heat-absorbing fins of the evaporator of the heat pump system from being covered by dust, thus avoiding a reduction in the efficiency of the heat pump system.

[0033] The present utility model is not limited to the above embodiments. Based on the technical solutions disclosed in the present utility model, those skilled in the art can make some substitutions and deformations to some of the technical features without creative labor according to the disclosed technical content. These substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A fine filtration dust collector with small volume and low consumption, comprising at least two cylinders arranged in parallel, characterized in that: There are two layers of filters inside the cylinder body. The lower layer is a coarse filter, and the upper layer is a fine filter. The two layers of filters divide the space inside the cylinder body into a pre-filter cavity in the lower part and a post-filter cavity in the upper part. The pre-filter cavities of each cylinder body are connected horizontally through interfaces, and the post-filter cavities of each cylinder body are connected horizontally through interfaces. A settling cylinder is provided below each cylinder body, and an ash discharge port is provided at the bottom of the settling cylinder. An air inlet main pipe is connected to the cylinder body at the frontmost end, and the air inlet main pipe is connected to the front interface of the pre-filter cavity of the cylinder body at the frontmost end. An air outlet main pipe is connected to the cylinder body at the rearmost end, and the air outlet main pipe is connected to the rear interface of the post-filter cavity of the cylinder body at the rearmost end. The front interface of the post-filter cavity of the cylinder body at the frontmost end is closed by a front sealing plate, and the rear interface of the pre-filter cavity of the cylinder body at the rearmost end is closed by a rear sealing plate.

2. The fine filtration dust collector with small volume and low consumption according to claim 1, characterized in that: The cylinder body is a unit component with the same structure. The interfaces are respectively arranged on both sides of the pre-filter cavity and both sides of the post-filter cavity. The corresponding front interfaces and rear interfaces of adjacent cylinder bodies are directly connected horizontally in the horizontal direction.

3. The fine filtration dust collector with small volume and low consumption according to claim 1 or 2, characterized in that: A side door for taking out and placing the filter is provided on the cylinder body.

4. The fine filtration dust collector with small volume and low consumption according to claim 3, characterized in that: An anti-blowing air port for blowing air to the coarse filter is provided between the coarse filter and the fine filter, and the anti-blowing air port is connected to a compressed air source.

5. The fine filtration dust collector with small volume and low consumption according to claim 3, characterized in that: The interfaces between adjacent cylinder bodies are connected by square flange interfaces.

6. The fine filtration dust collector with small volume and low consumption according to claim 3, characterized in that: The interfaces between adjacent cylinder bodies are connected by a plug-in method.

7. The fine filtration dust collector with small volume and low consumption according to claim 3, characterized in that: The coarse filter is a polyester fiber folded filter, and the fine filter is a V-shaped ultra-fine glass fiber paper combined filter.

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