CN216726290U - Self-cleaning type waste gas filtering device - Google Patents

Abstract

The application relates to a self-cleaning formula exhaust gas filtering device, including filtering piece, scraper blade and spray assembly, the scraper blade with spray assembly sets up in the waste gas passageway, the scraper blade is near filter the piece setting, the scraper blade with filter piece can relative movement, spray assembly can be right filter the piece and spray and handle. This application not only can strike off the debris that filter the side automatically, can also accomplish spraying to filtering and wash to can realize filtering the thorough cleanness of piece.

Description

Self-cleaning type waste gas filtering device

Technical Field

The application relates to a self-cleaning type waste gas filtering device, which is suitable for the technical field of waste gas treatment, in particular to the technical field of waste gas treatment and waste heat recovery of a setting machine.

Background

Many industrial waste gas all contain a large amount of solid particles or battings etc. if these waste gases do not pass through filtration treatment direct discharge, not only can cause the pollution to the air and bring the environmental protection problem, but also can cause the potential safety hazard to the normal operating of equipment, especially when having downstream equipment, still can cause the interference to the normal operating of downstream equipment.

The following description will take a setting machine in the textile industry as an example. The shaping machine can generate oil smoke containing organic matters and dye auxiliaries in the operation process, the main components of the oil smoke are aldehyde, ketone, hydrocarbon, fatty acid, alcohol, ester, lactone, heterocyclic compounds, aromatic compounds and the like, especially, a lubricant is added in the manufacturing process of yarns, and the components of the dye auxiliaries are more complicated during the after-finishing of functional fabrics for water resistance, flame retardance and the like. Meanwhile, after some fabrics are shaped at high temperature, a large amount of wool fibers in the fabrics enter waste gas. Therefore, the waste gas of the high-temperature setting machine contains a large amount of oil smoke and solid particles, and can cause great pollution to the environment. The existence of the substances can easily cause potential safety hazards such as fire of the setting machine and the like. On the other hand, the setting machine is also the most energy-consuming device in the dyeing and finishing process, and a large amount of hot air is consumed during operation. However, the effective heat energy of the fabric during processing and shaping is only about 30% of the total heating amount, the heat dissipation loss is as high as 70%, wherein the heat loss of waste gas emission is about 60%, and the heat dissipation capacity of equipment and wall surfaces is about 10%. If the heat in the part of waste gas can be recovered and reused for operation, the waste of heat can be greatly reduced, and the energy utilization efficiency is improved.

The waste gas of the setting machine is filtered and cleaned, so that on one hand, oil smoke containing a large amount of organic matters and dye auxiliaries can be removed, and the discharged waste gas is cleaner; on the other hand, a large amount of waste heat in the waste gas can be recovered, so that the energy consumption of the setting machine is reduced. In the waste gas waste heat recovery process, the waste heat in the waste gas is generally recovered by adopting a heat exchange mode of a heat exchanger. The heat exchanger heat exchange is very important to the cleaning of the surface of the heat exchanger. If the waste gas and the heat exchanger are directly subjected to contact type heat exchange, the surface of the heat exchanger is easily scaled, the heat transfer resistance value is increased, and the heat exchange efficiency of the heat exchanger is reduced. Therefore, after the waste gas is filtered and cleaned, the waste gas is subjected to heat exchange with the heat exchanger, which is an effective means for improving the waste heat recovery effect.

However, in the prior art, the filtering of the exhaust gas is generally realized by arranging a filter screen at the exhaust gas discharge outlet, and as the amount of solid particles and flocs in the exhaust gas is large, the filter screen is blocked after the setting machine runs for a long time, so that the exhaust gas cannot be discharged. At this moment, the filter screen can only be cleaned manually after the setting machine is stopped, so that the cleaning efficiency is low, and the smooth operation of the printing and dyeing process is greatly influenced. On the other hand, because the exhaust gas of the setting machine contains a large amount of oily substances, the oily substances can be stuck on the filter screen. If the solid particles and the lint on the surface of the screen are simply removed during cleaning, a good cleaning effect is still not achieved, and the oily substance stuck on the screen increases the adhesion force to the solid particles and the lint, thereby making the screen more difficult to clean. Therefore, there is a need in the art for a filter device that can automatically and thoroughly clean a filter screen.

SUMMERY OF THE UTILITY MODEL

The application provides a automatically cleaning formula exhaust gas filtering device, it not only can strike off the debris on filtering the piece automatically, but also can accomplish spraying to filtering the piece and wash to can realize filtering the automatic thorough cleanness of piece.

The application relates to a self-cleaning formula exhaust gas filtering device, including filtering piece, scraper blade and spray assembly, the scraper blade with spray assembly sets up in waste gas channel, the scraper blade is near filter the piece setting, the scraper blade with filter piece can relative movement, spray assembly is right filter the piece and spray and handle.

Wherein, the scraping plates can be arranged on both sides of the filtering element, or the scraping plates are arranged on one side of the filtering element, and the baffle plate is arranged on the other side; the filter element can be a plate filter element or a cylinder filter element; a receiving and separating unit can be arranged below the waste gas filtering device; the receiving and separating unit comprises a receiving disc and a separating box, and the scraped sundries and the sprayed liquid are separated in the separating box; the receiving separation unit may further comprise a circulation pump that circulates a spray liquid to the spray assembly.

Wherein the spray assembly may be disposed on one or both sides of the filter pack; a plurality of filter elements can be arranged in the waste gas filtering device in a grading way, and the filter elements at each grade are arranged in the same way or in different ways; the installation position of the filter element can be provided with a travel switch; the inside of the exhaust gas passage may be provided with a sensor that detects the flow rate of exhaust gas.

The self-cleaning waste gas filtering device has the following technical advantages:

(1) the scraper and the filter element can mutually generate reciprocating movement, so that sundries on the filter element can be continuously scraped and cleaned, and the waste gas can be ensured to continuously flow through the filter element;

(2) according to the waste gas treatment device, the spraying assembly and the scraper plate assembly are arranged in the waste gas channel, so that the space occupancy rate of the device is greatly reduced, and the operation space is saved;

(3) according to the filter element cleaning device, the receiving and separating unit is arranged to separate the scraped impurities from the spraying liquid, so that the spraying liquid is recycled, the temperature of the spraying liquid can be kept, and the impurities of the filter element can be washed away conveniently;

(4) this application can be according to actual need, with spray assembly and scraper blade subassembly setting in one side or both sides of exhaust gas passageway to can set up filtering piece in grades, set up conveniently and nimble.

Drawings

FIG. 1 is a schematic view of a self-cleaning exhaust gas filtering device according to the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict. The drawings of the present application are for illustration purposes only.

The application discloses automatically cleaning formula exhaust gas filtering device, including filtering piece 1, scraper blade subassembly 2 and spray set 3. Wherein the filter element 1 is arranged in the exhaust gas channel; the scraper assembly 2 is arranged close to the filter element 1 and can move along the surface of the filter element 1 to scrape off solid particles, flocks and other impurities attached to the filter element. It should be noted that, in the embodiments of the present application, the scraper assembly is described as an example of moving relative to the filter element, and those skilled in the art will understand that the filter element may be configured to move relative to the scraper assembly, or both, and all of them are within the protection scope of the present application.

The scraper assembly 2 may include scrapers 21 and baffles 22 disposed on both sides of the filter member 1, respectively, or scrapers 21 may be disposed on both sides of the filter member. Wherein the scraper 21 is capable of scraping the impurities from the surface of the filter element while moving, and the baffle or scraper on the opposite side is used to maintain good contact between the scraper 21 and the filter element 1. Due to the low rigidity of the filter screen on the surface of the filter element, if there is no baffle or scraper on the opposite side when scraping the impurities, the scraper may not be in close contact with the filter element, and thus the impurities on the surface of the filter element cannot be effectively scraped.

In the embodiment shown in fig. 1, the filter element 1 is a plate-type filter element, and an opening for mounting and dismounting the plate-type filter element is formed on the side wall of the exhaust gas passage, and the outer wall is sealed by an end cover 12 to prevent the exhaust gas from leaking. The filter element may be configured in a cylindrical configuration as desired, and the scraper assembly may be configured to move circumferentially along the cylindrical filter element.

The spray assembly 3 is disposed inside the exhaust gas passage and includes a spray head 31 and a pipe 32 for periodically or intermittently or continuously performing a spray process for washing and cleaning the filter elements. The spraying liquid can be water or liquid containing degreasing agent according to the requirement. The spray assembly 3 may be disposed on one or both sides of the filter pack 1. Preferably, the spray assembly is arranged to spray the liquid against the direction of flow of the exhaust gas. As shown in fig. 1, shower assemblies 3 are respectively provided on the lower sides of the filter elements 1 shown in the drawing to wash away foreign materials adhered to the opposite sides of the filter elements. Through the reciprocating motion of scraper blade for filtering piece, scrape debris such as the batting fibre of adhesion on filtering piece, then wash and wash the back through spray assembly, can thoroughly get rid of and filter debris and oily material on piece surface. And a receiving and separating unit can be arranged below the filtering device, and the scraped impurities can fall into the receiving and separating unit and be separated and collected. The spray head 31 of the spray assembly 3 can be in communication with the liquid separated in the receiving separation unit so that the spray liquid can be recycled.

Specifically, the receiving and separating unit may include a receiving tray, a circulating pump 33 and a separating box, the receiving tray is used for receiving the sundries scraped off by the cleaning scraper and the spraying liquid sprayed from the spraying assembly, the spraying liquid mixed with the sundries flows into the separating box to separate the sundries from the liquid, and the separated spraying liquid is conveyed to the nozzle of the spraying assembly through the circulating pump 33, so that the spraying liquid can be continuously recycled.

As shown in fig. 1, the filter element of the present application can be arranged in a plurality of stages as required, and each stage can be arranged in the same or different manner to filter and remove different substances in the exhaust gas in stages. The figure comprises two filter members 1 which are arranged in parallel, and scraper assemblies on the two filter members 1 reciprocate in a staggered mode. In the self-cleaning waste gas filtering device in the embodiment, the scraper component and the spraying component are both arranged in the waste gas channel, so that the working space is reduced to the greatest extent.

As shown in fig. 1, a travel switch 41 may be provided at the installation position of the filter element 1 to control whether the filter element is installed in place, the spraying interval time, the spraying pressure, etc., and the exhaust gas flow rate may be detected by a sensor 42 to estimate the clogging of the filter element, thereby further adjusting the operating parameters of the scraper assembly and the spraying assembly.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims (10)

1. A self-cleaning waste gas filtering device is characterized by comprising a filtering piece, a scraping plate and a spraying assembly, wherein the scraping plate and the spraying assembly are arranged in a waste gas channel, the scraping plate is close to the filtering piece, the scraping plate and the filtering piece can move relatively, and the spraying assembly is used for spraying the filtering piece.

2. The exhaust gas filtering device according to claim 1, wherein the scraper is provided on both sides of the filter member, or the scraper is provided on one side of the filter member and the baffle is provided on the other side of the filter member.

3. The exhaust gas filtering device according to claim 1, wherein the filter member is a plate-type filter member or a cartridge-type filter member.

4. An exhaust gas filtering device according to any one of claims 1-3, characterized in that a receiving and separating unit is provided below the exhaust gas filtering device.

5. The exhaust gas filtering apparatus according to claim 4, wherein the receiving and separating unit includes a receiving tray and a separating tank in which the scraped impurities and the spray liquid are separated.

6. The exhaust gas filtering device of claim 5, wherein the accepting separation unit further comprises a circulation pump that circulates spray liquid to the spray assembly.

7. An exhaust gas filtering device according to any one of claims 1 to 3 and 5 to 6, wherein the spray assembly is provided on one or both sides of the filter element.

8. The exhaust gas filtering device according to claim 7, wherein a plurality of the filter members are provided in stages in the exhaust gas filtering device, and the filter members of each stage are provided in the same arrangement or in different arrangements.

9. An exhaust gas filtering device according to any one of claims 1 to 3, 5 to 6 and 8, wherein the mounting position of the filter element is provided with a travel switch.

10. The exhaust gas filtering device according to any one of claims 1 to 3, 5 to 6, and 8, wherein a sensor that detects the flow rate of exhaust gas is provided inside the exhaust gas passage.

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