Coarse and fine filtration dust remover for drying system

Abstract

The utility model discloses a coarse and fine filtration dust remover for a drying system in the field of dust removal devices. The coarse and fine filtration dust remover comprises a coarse filtration device and a fine filtration device, the rough filtration device comprises at least two cylinders which are arranged in parallel, a polyester fiber square frame filter is arranged in each cylinder, the space in each cylinder is divided into a lower pre-filtration cavity and an upper post-filtration cavity by the polyester fiber square frame filter, the pre-filtration cavities of the cylinders are connected, the post-filtration cavities of the cylinders are also connected, and a sedimentation cylinder is arranged below each cylinder; the barrel on the inlet side is provided with an air inlet pipe connected with the pre-filtration cavity, the barrel on the outlet side is provided with a confluence air outlet connected with the post-filtration cavity, a fine filtration filter is arranged in the box body of the fine filtration device, the pre-filtration cavity of the fine filtration filter is connected with the confluence air outlet, and the post-filtration cavity of the fine filtration filter is connected with a main air outlet pipe. The dust removal efficiency is high; the size is small, heat dissipation is small, and therefore the waste heat recovery efficiency is high. The device can be used for dust removal of drying systems of grains, fruits and vegetables, tea leaves and other industrial materials.

Description

Technical Field

[0001] The utility model relates to a dust removal device, in particular to a gaseous fluid dust remover used in a heat pump drying system for grains, fruits and vegetables, tea leaves and other industrial materials. Background Art

[0002] The prior art heat pump drying system mainly includes a compressor, the refrigerant outlet of the compressor is connected to the refrigerant inlet of the condenser, the hot air outlet after heat exchange of the condenser is connected to the dryer, the waste hot air at the dryer outlet is connected to the air inlet 1 of the evaporator through the dust removal system, the air inlet 2 of the evaporator is connected to the atmosphere, the refrigerant outlet of the condenser is connected to the refrigerant inlet of the evaporator through the throttling device, and the refrigerant outlet of the evaporator is connected to the compressor inlet.

[0003] The existing dust removal system is mainly composed of an ash room and a bag dust collector connected in series. The ash room uses the special structure of the internal air duct to settle large particles of dust, and the bag dust collector plays a fine filtering role to filter out fine dust.

[0004] For solid powder materials such as grain, industrial solid powder materials, fruits and vegetables, tea, etc., the waste heat gas after drying in the dryer needs to be recovered. However, the waste heat gas contains a large amount of fine dust particles. When it enters the evaporator of the heat pump system, the evaporator heat-absorbing fins will soon be covered with dust, which greatly reduces the efficiency of the heat pump system. The existing technology uses an ash room as the primary dust removal, and then uses a bag-type dust collector for fine dust removal.

[0005] The disadvantage is that the ash room is large in size, has a large heat dissipation area, and has a large heat loss. The waste heat gas after drying by the dryer has a large waste heat loss, so the waste heat utilization efficiency is not high. Bag-type dust collectors will make cleaning difficult. Utility Model Content

[0006] The utility model aims to provide a coarse and fine filter dust collector for a drying system, which has high dust removal efficiency, small volume, small heat dissipation, and high waste heat recovery efficiency.

[0007] The purpose of the utility model is achieved as follows: a coarse and fine filter dust collector for a drying system, comprising a coarse filter device and a fine filter device, wherein the coarse filter device is connected to the air outlet of the drying system, the fine filter device is connected to the outlet of the coarse filter device, the fine filter device is connected to one of the air inlets of the evaporator of the heat pump system through the total air outlet pipe, and the second air inlet of the evaporator of the heat pump system is connected to the atmosphere; the coarse filter device comprises at least two cylinders arranged in parallel, a polyester fiber frame filter is arranged in the cylinder, and the polyester fiber frame filter divides the space in the cylinder into lower and upper The pre-filter cavity at the bottom and the post-filter cavity at the top, the pre-filter cavities of each cylinder are connected, and the post-filter cavities of each cylinder are also connected. A sedimentation cylinder is provided at the bottom of each cylinder, and an ash outlet is provided at the bottom of the sedimentation cylinder; an air inlet pipe is provided on the cylinder on the inlet side, and the air inlet pipe is connected to the pre-filter cavity; a converging air outlet is provided on the cylinder on the outlet side, and the converging air outlet is connected to the post-filter cavity of the cylinder; the fine filtering device comprises a box body, a fine filter is provided in the box body, the pre-filter cavity of the fine filter is connected to the converging air outlet, and the post-filter cavity of the fine filter is connected to the main air outlet pipe.

[0008] When the device is working, the dusty hot air from the dryer outlet of the heat pump drying system enters from the air inlet pipe, flows horizontally in the pre-filter cavity, then passes upward through the polyester fiber frame filter into the post-filter cavity, and then is further filtered by the fine filter, leaves from the main air outlet pipe, and then recovers waste heat in the evaporator of the heat pump drying system. When the hot air passes through the polyester fiber frame filter, a large amount of dust is trapped on the lower side of the polyester fiber frame filter. When the dust accumulates to a certain amount, the dust is blown back by compressed air to drop to the ash outlet. The polyester fiber frame filter can be regenerated by automatically and rapidly blowing without stopping the machine, thereby ensuring that its filtering effect is always maintained in a high-efficiency filtering state. The device has at least two cylinders arranged in parallel, so that multiple polyester fiber frame filters can be set, which can greatly increase the filtering area, and at the same time, the wind pressure loss is small. Compared with the prior art, the heat pump drying system for heat recovery of waste heat air flow of the utility model has the following beneficial effects: (1) Since the device integrates coarse filtration and fine filtration in one, it has a small volume and a small heat dissipation area, so the heat dissipation loss is greatly reduced; (2) The device has a high dust removal efficiency and can basically remove dust particles larger than 0.5 microns, so it can replace the dust removal system of the prior art with a ash room and a bag dust collector, greatly reducing the occupied plant area; (3) The cost of consumables and labor costs during operation are greatly reduced. The coarse filtration part of the device has basically removed dust particles larger than 5 microns, greatly reducing the fine filtration part. The burden of the fine filter can be extended to several months before the filter components need to be scrapped and replaced without any treatment in the middle. The filter components of the coarse filter can be automatically regenerated by back-blowing with compressed air and quickly replaced with spare parts every few days and then flushed and regenerated with water for standby use. The consumables are lower and the labor hours are also low. (4) The device is assembled from several standard units, which is convenient for standardized production and reduces production costs. The originally huge equipment is more convenient to package and transport in the form of several small parts. At the application site, it can be easily assembled into several dust collectors of different specifications suitable for different air volumes. The device is particularly suitable for fine filtration and dust removal of waste heat from drying systems of grains, fruits and vegetables, tea and other industrial materials.

[0009] Furthermore, a platform for placing the polyester fiber square filter is provided in the cylinder, and the polyester fiber square filter is placed horizontally on the platform, and an openable cover for taking and placing the polyester fiber square filter is provided on the upper part of the cylinder. This structure allows the polyester fiber square filter to be easily disassembled and assembled, and is convenient for cleaning.

[0010] To ensure sealing, a sealing strip is provided between the polyester fiber square frame filter and the shelf platform.

[0011] Furthermore, a back-blowing air port is provided above the polyester fiber frame filter, and the back-blowing air port is connected to a compressed air source.

[0012] As a further improvement of the utility model, the cylinder is a unit component with the same structure, and interfaces are respectively provided on both sides of the pre-filter cavity and the post-filter cavity. The interfaces corresponding to the pre-filter cavities of adjacent cylinders are laterally matched and connected, and the interfaces corresponding to the post-filter cavities of adjacent cylinders are also laterally matched and connected. The front interface of the post-filter cavity of the cylinder located at the front end is closed by a front sealing plate, and the rear interface of the pre-filter cavity of the cylinder located at the rear end is closed by a rear sealing plate. This patent design becomes a unitized standard component, which can be standardized and mass-produced with high efficiency, reducing manufacturing costs, and can also be quickly assembled on site into dust collectors of various specifications suitable for different filtering air volumes. The dust collector is changed from a huge one to several small pieces, which is also convenient for transportation.

[0013] Furthermore, to ensure convenient connection, the interfaces of adjacent cylinders of the coarse filter device and the cylinder of the coarse filter device and the fine filter device housing are connected by a square frame flange interface. The interfaces of adjacent cylinders can also be plug-in connected.

[0014] Furthermore, the fine filter comprises a plurality of V-shaped ultra-fine glass fiber paper square box filters arranged in parallel, the V-shaped ultra-fine glass fiber paper square box filters are tilted and placed on an inclined platform in the box body, the inclined platform is a hollow platform, the hollow part of the inclined platform corresponds to the effective filtering surface of the V-shaped ultra-fine glass fiber paper square box filter one by one, a sealing strip is arranged between the inclined platform and the V-shaped ultra-fine glass fiber paper square box filter, and an openable box cover for taking and placing the V-shaped ultra-fine glass fiber paper square box filter is arranged on the upper part of the box body. This structure ensures that the V-shaped ultra-fine glass fiber paper square box filter is easy to disassemble and assemble, and the box cover can be opened to directly take it out and replace it. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 Schematic diagram of the coarse filtration device structure.

[0017] Figure 3 It is a schematic diagram of the unit component structure.

[0018] Figure 4 This is a schematic diagram of the structure of the unit component after the cover is opened.

[0019] Figure 5 for Figure 2 A partial enlarged view of middle A.

[0020] Figure 6 This is a working principle diagram of the utility model.

[0021] In the figure, 1 is the ash outlet, 2 is the sedimentation cylinder, 3 is the first interface before the filter, 4 is the front sealing plate, 5 is the first interface after the filter, 6 is the cover plate, 7 is the polyester fiber frame filter, 8 is the air outlet, 9 is the second interface after the filter, 10 is the second interface before the filter, 11 is the rear sealing plate, 12 is the cylinder, 13 is the air inlet pipe, 14 is the sealing strip, 15 is the converging air outlet, 16 is the V-type ultra-fine glass fiber paper square box filter, 17 is the main air outlet pipe, 18 is the box body, and 19 is the box cover. DETAILED DESCRIPTION

[0022] like Figure 1-6 As shown, a coarse and fine filter dust collector for a drying system comprises a coarse filter device and a fine filter device, wherein the coarse filter device is connected to the air outlet of the drying system, and the fine filter device is connected to the outlet of the coarse filter device, and the fine filter device is connected to one of the air inlets of the evaporator of the heat pump system through the main air outlet pipe 17, and the second inlet of the evaporator of the heat pump system is connected to the atmosphere; the coarse filter device comprises at least two cylinders 12 arranged in parallel, and a polyester fiber frame filter 7 is arranged in the cylinder 12, and the polyester fiber frame filter 7 divides the space in the cylinder 12 into a lower pre-filter cavity and an upper post-filter cavity, and each cylinder The pre-filter cavities of the cylinders 12 are connected, and the post-filter cavities of each cylinder 12 are also connected. A settling cylinder 2 is provided under each cylinder 12, and an ash outlet 1 is provided at the bottom of the settling cylinder 2; an air inlet pipe 13 is provided on the cylinder 12 on the inlet side, and the air inlet pipe 13 is connected to the pre-filter cavity; a converging air outlet 15 is provided on the cylinder 12 on the outlet side, and the converging air outlet 15 is connected to the post-filter cavity of the cylinder 12; the fine filtering device includes a box 18, and a fine filter is provided in the box 18, the pre-filter cavity of the fine filter is connected to the converging air outlet 15, and the post-filter cavity of the fine filter is connected to the main air outlet 17.

[0023] A platform for placing the polyester fiber square filter 7 is provided in the cylinder 12. On the platform where the polyester fiber square filter 7 is placed horizontally, a cover plate 6 is provided on the upper part of the cylinder 12 for opening and placing the polyester fiber square filter 7. A sealing strip 14 is provided between the polyester fiber square filter 7 and the placing platform.

[0024] A back-blowing air port 8 is provided above the polyester fiber frame filter 7, and the back-blowing air port 8 is connected to a compressed air source.

[0025] The cylinder 12 is a unit component with the same structure. Interfaces are respectively provided on both sides of the pre-filter cavity and the post-filter cavity. The interfaces are pre-filter interface 1 3, pre-filter interface 2 10, post-filter interface 1 5, and post-filter interface 2 9. The interfaces corresponding to the pre-filter cavities of adjacent cylinders 12 are transversely matched and connected, that is, the pre-filter interface 2 10 of the previous cylinder 12 is connected to the pre-filter interface 3 of the next cylinder; the interfaces corresponding to the post-filter cavities of adjacent cylinders 12 are also transversely matched and connected, that is, the post-filter interface 2 9 of the previous cylinder 12 is connected to the post-filter interface 1 5 of the next cylinder 12. The post-filter interface 1 5 of the post-filter cavity of the cylinder 12 at the front end is closed by the front sealing plate 4, and the pre-filter interface 2 10 of the pre-filter cavity of the cylinder 12 at the rear end is closed by the rear sealing plate 11. The unit component is easy to manufacture and has low cost. It can be quickly assembled into dust collectors with different filtering air volumes. The interfaces of adjacent cylinders 12 are plug-in connected. The interfaces of adjacent cylinders and the cylinder of the coarse filtration device and the box of the fine filtration device can also be connected by using square frame flange interfaces.

[0026] The fine filter includes a plurality of V-shaped ultra-fine glass fiber paper square box filters 16 arranged in parallel. The V-shaped ultra-fine glass fiber paper square box filters 16 are tilted and placed on an inclined platform in a box body 18. The inclined platform is a hollow platform. The hollow part of the inclined platform corresponds one to one with the effective filtering surface of the V-shaped ultra-fine glass fiber paper square box filter 16. A sealing strip 14 is arranged between the inclined platform and the V-shaped ultra-fine glass fiber paper square box filter 16. A switchable box cover 19 is arranged on the upper part of the box body 18.

[0027] When the device is working, the dusty hot air from the dryer outlet of the heat pump drying system enters from the air inlet pipe 13, the hot air flows horizontally in the pre-filter cavity, then passes upward through the polyester fiber frame filter 7 to enter the post-filter cavity, and then leaves from the main air outlet pipe 17 after further filtering by the fine filter, and then recovers the waste heat in the evaporator of the heat pump drying system. When the hot air passes through the polyester fiber frame filter 7, a large amount of dust is trapped on the lower side of the polyester fiber frame filter 7. When the dust accumulates to a certain amount, the dust is blown back to the ash outlet 1, and the polyester fiber frame filter 7 is regenerated, thereby ensuring that its filtering effect is always maintained in a high-efficiency filtering state. The device has at least two cylinders 12 arranged in parallel, so that multiple polyester fiber frame filters 7 can be set, which can greatly increase the filtering area, and at the same time, the wind pressure loss is small.

[0028] The beneficial effects are: the device has high dust removal efficiency and can replace the existing ash room and bag filter, and the polyester fiber frame filter 7 is easy to regenerate and easy to manage; the whole device is small in size, so that its heat dissipation surface is small and the heat loss is low, so that the subsequent recovery of waste heat through the evaporator is efficient. The device is specially used for dust removal in heat pump drying systems.

[0029] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A coarse and fine filter dust collector for a drying system, characterized in that: The invention comprises a coarse filter device and a fine filter device, wherein the coarse filter device is connected to the air outlet of the drying system, the fine filter device is connected to the outlet of the coarse filter device, the fine filter device is connected to one of the air inlets of the evaporator of the heat pump system through the main air outlet pipe, and the second air inlet of the evaporator of the heat pump system is connected to the atmosphere; the coarse filter device comprises at least two cylinders arranged in parallel, a polyester fiber square frame filter is arranged in the cylinder, the polyester fiber square frame filter divides the space in the cylinder into a lower pre-filter cavity and an upper post-filter cavity, the pre-filter cavities of each cylinder are connected, the post-filter cavities of each cylinder are also connected, a settling cylinder is arranged below each cylinder, and an ash outlet is arranged at the bottom of the settling cylinder; an air inlet pipe is arranged on the cylinder on the inlet side, and the air inlet pipe is connected to the pre-filter cavity; a converging air outlet is arranged on the cylinder on the outlet side, and the converging air outlet is connected to the post-filter cavity of the cylinder; the fine filter device comprises a box, a fine filter is arranged in the box, the pre-filter cavity of the fine filter is connected to the converging air outlet, and the post-filter cavity of the fine filter is connected to the main air outlet pipe.

2. A coarse and fine filter dust collector for a drying system according to claim 1, characterized in that: The cylinder is provided with a platform for placing the polyester fiber frame filter, the polyester fiber frame filter is placed horizontally on the platform, and the upper part of the cylinder is provided with a cover plate which can be opened to take out and place the polyester fiber frame filter.

3. A coarse and fine filter dust collector for a drying system according to claim 2, characterized in that: A sealing wool strip is arranged between the polyester fiber square frame filter and the placing platform.

4. A coarse and fine filter dust collector for a drying system according to any one of claims 1 to 3, characterized in that: A back-blowing air port is arranged above the polyester fiber frame filter, and the back-blowing air port is connected to a compressed air source.

5. A coarse and fine filter dust collector for a drying system according to any one of claims 1 to 3, characterized in that: The cylinder is a unit component with the same structure. Interfaces are respectively provided on both sides of the pre-filter cavity and both sides of the post-filter cavity. The interfaces corresponding to the pre-filter cavities of adjacent cylinders are laterally matched and connected, and the interfaces corresponding to the post-filter cavities of adjacent cylinders are also laterally matched and connected. The front interface of the post-filter cavity of the cylinder located at the front end is closed by a front sealing plate, and the rear interface of the pre-filter cavity of the cylinder located at the rear end is closed by a rear sealing plate.

6. A coarse and fine filter dust collector for a drying system according to claim 5, characterized in that: The interfaces of adjacent cylinders and the coarse filtering device and the box body are connected by square frame flange interfaces.

7. The coarse and fine filter dust collector for a drying system according to claim 5, characterized in that: The interfaces of adjacent cylinders are plug-connected.

8. A coarse and fine filter dust collector for a drying system according to any one of claims 1 to 3, characterized in that: The fine filter comprises a plurality of V-shaped ultra-fine glass fiber paper square box filters arranged in parallel, the V-shaped ultra-fine glass fiber paper square box filters are tilted and placed on an inclined platform in a box body, the inclined platform is a hollow platform, the hollow part of the inclined platform corresponds one to one with the effective filtering surface of the V-shaped ultra-fine glass fiber paper square box filter, a sealing wool strip is arranged between the inclined platform and the V-shaped ultra-fine glass fiber paper square box filter, and an openable box cover for taking and placing the V-shaped ultra-fine glass fiber paper square box filter is arranged on the upper part of the box body.

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