Dust remover for heat pump drying system

Abstract

The utility model relates to a dust remover for a heat pump drying system in the field of dust removing devices, which comprises at least two cylinders arranged in parallel, polyester fiber square frame filters are arranged in the cylinders, the polyester fiber square frame filters divide the space in the cylinders into lower pre-filtering cavities and upper post-filtering cavities, and the pre-filtering cavities are communicated with the post-filtering cavities through the polyester fiber square frame filters. The pre-filtering cavities of the cylinders are transversely connected, the post-filtering cavities of the cylinders are transversely connected, a settling cylinder is arranged below each cylinder, and an ash outlet is formed in the bottom of each settling cylinder; a main air inlet is formed in the cylinder body on one side and is connected with the pre-filtering cavity; and a main air outlet is formed in the cylinder body on the other side and is connected with the post-filtration cavity. The device is high in dust removal efficiency; the size is small, heat dissipation is small, and therefore the waste heat recovery efficiency is high. The device can be used for drying 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 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 has a large volume, a large heat dissipation area, a large heat loss, and a large waste heat loss of the waste heat gas after drying by the dryer, so the waste heat utilization efficiency is not high. Utility Model Content

[0006] The utility model aims to provide a dust collector for a heat pump 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 dust collector for a heat pump drying system, comprising at least two cylinders arranged in parallel, a polyester fiber frame filter is provided in the cylinder, the polyester fiber 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 horizontally connected, the post-filter cavities of each cylinder are horizontally connected, a sedimentation cylinder is provided under each cylinder, and an ash outlet is provided at the bottom of the sedimentation cylinder; a total air inlet is provided on the cylinder on one side, and the total air inlet is connected to the pre-filter cavity; a total air outlet is provided on the cylinder on the other side, and the total air outlet is connected to the post-filter cavity.

[0008] When the utility model is working, the dusty hot air from the dryer outlet of the heat pump drying system enters from the main air inlet, the hot air flows horizontally in the pre-filter cavity, then passes upward through the polyester fiber frame filter into the post-filter cavity, and then leaves from the main air outlet, and the waste heat is recovered 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 make it fall 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 arranged, which can greatly increase the filtering area, and at the same time, the wind pressure loss is small.

[0009] Compared with the prior art, the heat pump drying system for waste heat recovery of the utility model has the following beneficial effects:

[0010] (1) The device has high dust removal efficiency and can basically remove dust particles larger than 5 microns in the waste heat exhaust gas flow. It can not only completely replace the ash room of the existing technology, but also partially replace the subsequent bag dust collector, reduce the number of bag dust collectors or reduce the specifications of bag dust collectors, and reduce the area of ​​the factory building occupied by the equipment.

[0011] (2) The polyester fiber square filter can be easily regenerated regularly without stopping the machine using compressed air. The polyester fiber square filter can also be quickly replaced with spare parts every few days during downtime, and then rinsed with water before being put back into use, which greatly reduces the cost of consumables and labor time during operation.

[0012] (3) The small size of the entire device results in a small heat dissipation surface and low heat loss, which in turn makes the subsequent recovery of waste heat through the evaporator highly efficient.

[0013] (4) The device is assembled from several standard units, which facilitates 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.

[0014] The device can be used in the drying system of grain, fruits and vegetables, tea and other industrial materials.

[0015] Furthermore, a placing platform for placing the polyester fiber frame filter is provided in the cylinder, and the placing platform is a hollow platform. The polyester fiber frame filter is placed horizontally on the hollow platform, and the effective filtering surface of the polyester fiber frame filter corresponds to the hollow part of the hollow platform. An openable cover for taking and placing the polyester fiber frame filter is provided on the upper part of the cylinder. After opening the cover, the polyester fiber frame filter can be easily taken out for washing or replacement, and it is also convenient to reset.

[0016] To further achieve sealing, a sealing wool strip is provided between the polyester fiber square frame filter and the shelf platform.

[0017] In order to facilitate the regeneration of the polyester fiber square filter, a back-blowing air port is provided above the polyester fiber square filter, and the back-blowing air port is connected to a compressed air source. The back-blowing air port can be a plurality of air jet holes provided on the air blowing pipe, or can be an air jet nozzle connected to the top of the polyester fiber square filter through a plurality of air pipes. The dust in the polyester fiber square filter can be blown off to the ash outlet by back-blowing, so that the polyester fiber square filter can be regenerated. A plurality of solenoid valves are provided between the back-blowing air port and the compressed air source, and the polyester fiber square filter can be frequently and automatically cleaned and blown without stopping the machine by opening and closing the solenoid valves in turn, so that the filter can be frequently and efficiently filtered.

[0018] Furthermore, 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 at the front end is closed by a front sealing plate, and the rear interface of the pre-filter cavity of the cylinder 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.

[0019] Furthermore, the interfaces of adjacent cylinders are plug-connected or the interfaces of adjacent cylinders are connected by using a square frame flange interface. In this way, assembly can be performed quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model.

[0021] Figure 2 It is a schematic diagram of the unit component structure.

[0022] Figure 3 This is a schematic diagram of the structure of the unit component after the cover is opened.

[0023] Figure 4 for Figure 1 A partial enlarged view of middle A.

[0024] 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 main air inlet, 14 is the sealing strip, and 15 is the main air outlet. DETAILED DESCRIPTION

[0025] like Figure 1-4 As shown, a dust collector for a heat pump drying system comprises at least two cylinders 12 arranged in parallel, wherein 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, the pre-filter cavities of each cylinder 12 are connected transversely, and the post-filter cavities of each cylinder 12 are connected transversely, and a sedimentation cylinder 2 is arranged below each cylinder 12, and an ash outlet 1 is arranged at the bottom of the sedimentation cylinder 2; a total air inlet 13 is arranged on the cylinder 12 on one side, and the total air inlet 13 is connected to the pre-filter cavity; a total air outlet 15 is arranged on the cylinder 12 on the other side, and the total air outlet 15 is connected to the post-filter cavity.

[0026] A placing platform for placing the polyester fiber frame filter 7 is provided in the cylinder 12, and the placing platform is a hollow platform. The polyester fiber frame filter 7 is placed horizontally on the hollow platform, and the effective filtering surface of the polyester fiber frame filter 7 corresponds to the hollow part of the hollow platform. A cover plate 6 is provided on the upper part of the cylinder 12, which can be opened and the polyester fiber frame filter 7 can be taken out. After opening the cover plate 6, the polyester fiber frame filter 7 can be easily taken out for washing or replacement, and it is also convenient to reset it.

[0027] To further achieve sealing, a sealing wool strip 14 is provided between the polyester fiber frame filter 7 and the placement platform.

[0028] In order to facilitate the regeneration of the polyester fiber square filter 7, a back-blowing air port 8 is provided above the polyester fiber square filter 7, and the back-blowing air port 8 is connected to a compressed air source. The back-blowing air port 8 can be a plurality of air jet holes provided on the air blowing pipe, or can be an air jet nozzle connected to the polyester fiber square filter 7 via a plurality of air pipes. The dust in the polyester fiber square filter 7 can be blown off to the ash outlet 1 by back-blowing, so that the polyester fiber square filter 7 is regenerated.

[0029] 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, which 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, low in cost, and can be quickly assembled into dust collectors with different filtering air volumes.

[0030] Furthermore, the interfaces of adjacent cylinders 12 are plug-connected, and assembly can be performed quickly in this way.

[0031] When the device is working, the dust-containing hot air from the dryer outlet of the heat pump drying system enters from the main air inlet 13, flows horizontally in the pre-filter cavity, then passes upward through the polyester fiber frame filter 7 into the post-filter cavity, and then leaves from the main air outlet 15, and the waste heat is recovered 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. The beneficial effects are: the device has high dust removal efficiency, can replace the existing ash room and part of the bag filter, and the polyester fiber frame filter 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.

[0032] 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 dust collector for a heat pump drying system, characterized in that: It comprises at least two cylinders arranged in parallel, wherein a polyester fiber frame filter is arranged in the cylinder, and the polyester fiber 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 transversely, and the post-filter cavities of each cylinder are connected transversely, a sedimentation cylinder is arranged under each cylinder, and an ash outlet is arranged at the bottom of the sedimentation cylinder; a total air inlet is arranged on the cylinder on one side, and the total air inlet is connected to the pre-filter cavity; a total air outlet is arranged on the cylinder on the other side, and the total air outlet is connected to the post-filter cavity.

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

3. A dust collector for a heat pump 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 dust collector for a heat pump 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 dust collector for a heat pump drying system according to claim 4, characterized in that: The back-blowing air ports are a plurality of air-jet holes arranged on the air-blowing pipe.

6. A dust collector for a heat pump drying system according to claim 4, characterized in that: The back-blowing air port is an air jet nozzle connected to the top of the polyester fiber square frame filter via a plurality of air pipes.

7. A dust collector for a heat pump 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 frontmost end is closed by a front sealing plate, and the rear interface of the pre-filter cavity of the cylinder located at the rearmost end is closed by a rear sealing plate.

8. A dust collector for a heat pump drying system according to claim 7, characterized in that: The interfaces of adjacent cylinders are connected by square-frame flange interfaces.

9. A dust collector for a heat pump drying system according to claim 7, characterized in that: The interfaces of adjacent cylinders are plug-connected.

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