Dust purification and recovery device for feeding

Abstract

The utility model discloses a dust purification and recovery device for feeding, which belongs to the technical field of gas purification equipment and comprises a backwash filter and an exhaust fan, an air inlet of the backwash filter is connected with an exhaust pipe of a feeding tank, and an air outlet of the backwash filter is connected with the exhaust fan. A water inlet is formed in the top of the backwashing filter; a bottom outlet is connected with the feeding tank through a return pipe; and the backwashing filter is also provided with a scraping mechanism. Exhaust gas of the feeding tank is filtered through the backwashing filter, so that flying dust generated during feeding is avoided, and safe production is ensured; the filtered gas is conveyed to a tail gas treatment system through an exhaust fan for further purification treatment, so that up-to-standard emission is realized; a filter element in the backwashing filter is subjected to backwashing through a water inlet so as to improve the filtering effect, and discharged material-containing liquid flows back to the feeding tank to be recycled, so that material waste is reduced; powder which cannot be washed off on the surface of the filter element is removed by the scraping mechanism, so that the filter element is thoroughly cleaned; cleaning is not needed after feeding, and the labor amount of workers is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas purification equipment technical field, especially relate to a dust purification and recovery device for feeding. BACKGROUND

[0002] In the production of chemical enterprises, the powdery material will inevitably produce dust in the feeding process, and the dust will not only cause material waste, but also pollute the working environment, which is not conducive to the health of the workers.

[0003] In addition, the dust of some materials reaches a certain concentration in the workshop, which also has the risk of explosion. Once the dust explosion occurs due to a fire source, it will cause extremely serious consequences.

[0004] Therefore, it is urgent to develop a purification device to recover and process the dust generated in the feeding process, to reduce material waste and environmental pollution, and to achieve the purpose of safe production and standard emission. UTILITY MODEL CONTENT

[0005] In order to solve the above problems, the utility model provides a dust purification and recovery device for feeding.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A dust purification and recovery device for feeding, comprising a backwash filter and an exhaust fan connected to a tail gas treatment system, the gas inlet of the backwash filter is connected to the exhaust pipe of the feeding tank, the gas outlet of the backwash filter is connected to the inlet of the exhaust fan, the top of the backwash filter is provided with a water inlet for backwashing the filter element in the backwash filter, the bottom outlet of the backwash filter is connected to the feeding tank through a backflow pipe, and the backwash filter is also provided with a scraping mechanism for removing the material adhered to the surface of the filter element.

[0008] Further, the backwash filter comprises a shell and a plurality of filter elements inside the shell, the inner cavities of the filter elements are communicated with a main pipe, one end of the main pipe is connected to the water inlet through a valve I and the other end is connected to the air outlet through a valve II and the exhaust fan, the lower end of the filter element is sealed and fixed on the support plate, the support plate between adjacent filter elements is provided with mesh holes for the cleaning liquid to pass through, the valve III is arranged at the gas inlet and the gas inlet is arranged on the side wall of the shell above the support plate, and the valve IV is arranged at the middle outlet of the bottom of the shell.

[0009] Further, the bottom of the shell is provided with a discharging cavity with a large upper part and a small lower part, the support plate is arranged at the top of the discharging cavity, and the valve IV is arranged outside the bottom outlet of the discharging cavity.

[0010] Further, the shell is cylindrical, one filter core is arranged in the middle of the shell, and other filter cores are arranged in a circumferential direction; the main pipe comprises an annular pipe and a radial connecting pipe in communication with the annular pipe, the annular pipe is in communication with the inner cavities of the circumferentially arranged filter cores through branch pipes, and the connecting pipe can be in communication with the inner cavity of the middle filter core; the air inlet is arranged at the bottom of the side wall of the shell.

[0011] Further, the scraping mechanism comprises a flat plate, a plurality of push-pull rods and a plurality of annular scrapers, the annular scrapers are sleeved on the outer wall of the filter core, the edges of the middle annular scrapers are connected with the annular scrapers around through connecting rods, the push-pull rods are vertically fixed on the connecting rods, the push-pull rods are sealingly and slidably matched with rod holes on the top wall of the shell, and the top portions of the plurality of push-pull rods are connected with the bottom surface of the flat plate above the shell; the number of the push-pull rods is not greater than the number of the annular scrapers.

[0012] Further, the flat plate is connected with a lifting mechanism, and the lifting mechanism is used for driving the flat plate to lift to drive the annular scrapers to slide up and down along the surface of the filter core.

[0013] Further, the lifting mechanism is an electric push rod or an air cylinder, and the movable end of the electric push rod or the air cylinder is connected with the flat plate.

[0014] Further, a wire mesh trap is arranged on the pipeline between the air extractor and the backwashing filter, and is used for filtering impurities in the air inlet of the air extractor.

[0015] Compared with the prior art, the technical progress achieved by the utility model lies in that:

[0016] The device filters the exhaust gas of the feeding tank through the backwashing filter, avoids the dust raising phenomenon, and realizes the purpose of reaching the discharge standard by conveying the filtered gas to the tail gas treatment system for further purification treatment, and improving the filtering effect by backwashing the filter core in the backwashing filter through the water inlet, and recycling the material liquid backflowed from the flushing discharge, and reducing the material waste; meanwhile, the powder on the surface of the filter core which cannot be washed off is removed by the scraping mechanism, and the filter core is completely cleaned. The utility model can solve the problems of dust pollution of the environment and serious material waste during feeding, and realizes the purposes of safe production and tail gas discharge reaching the standard; meanwhile, the work staff's labor intensity is reduced after feeding without cleaning, and the utility model is convenient to popularize and apply. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used together with the embodiments of the utility model to explain the utility model, and do not constitute a limitation on the utility model.

[0018] In the drawings:

[0019] Figure 1 A structure schematic view of the dust purification and recovery device for feeding is provided for the embodiment of the utility model;

[0020] Figure 2 An internal structure schematic view of the backwashing filter in the embodiment of the utility model;

[0021] Figure 3 A structure schematic view of the main pipe in the embodiment of the utility model;

[0022] Figure 4 A Figure 2 Filter gas state diagram of the backwashing filter in the embodiment of the utility model;

[0023] Figure 5 A Figure 2 Backwashing state diagram of the backwashing filter in the embodiment of the utility model;

[0024] Figure 6 Cooperation schematic view of the backwashing filter and the scraping mechanism in another embodiment of the utility model;

[0025] Figure 7 A Figure 6 Cooperation schematic view of the filter core and the annular scraper in the embodiment of the utility model;

[0026] In the figure,

[0027] 00 - feeding tank; 01 - exhaust pipe; 02 - stirring mechanism; 03 - feeding port;

[0028] 1 - backwashing filter; 2 - exhaust fan; 3 - return pipe; 4 - filter core; 5 - shell; 6 - main pipe, 60 - branch pipe, 61 - annular pipe, 62 - connecting pipe; 7 - valve I; 8 - water inlet pipe; 9 - valve II; 10 - support plate; 11 - mesh; 12 - valve III; 13 - valve IV; 14 - discharging cavity; 15 - flat plate; 16 - push-pull rod; 17 - annular scraper; 18 - connecting rod; 19 - wire mesh trap. DETAILED DESCRIPTION

[0029] The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described repeatedly in some embodiments. The embodiments of the utility model will be described below with reference to the drawings.

[0030] As Figure 1 , 2As shown, a dust purification and recovery device for feeding includes a backwash filter 1 and an exhaust fan 2 for connection to a tail gas treatment system. The air inlet of the backwash filter 1 is connected to the exhaust pipe 01 of the feeding tank 00, and the air outlet of the backwash filter 1 is connected to the inlet of the exhaust fan 2. The top of the backwash filter 1 is provided with a water inlet for backwashing the filter element 4 inside the backwash filter 1. The bottom outlet of the backwash filter 1 is connected to the feeding tank 00 through a return pipe 3. The backwash filter 1 is also provided with a scraping mechanism for removing material adhering to the surface of the filter element 4 inside the backwash filter. The exhaust gas during the feeding process is drawn to the backwash filter for filtration by the exhaust fan. The material adheres to the surface of the filter element. The filtered gas is then drawn into the tail gas treatment system for further purification, ultimately achieving compliant emissions. When the filter element becomes clogged to a certain extent, it will affect the filtration effect. At this time, the backwashing step can be initiated to backwash the filter element, and the scraping mechanism is used to remove the material that is difficult to remove from the surface of the filter element. The filtration state and backwashing state of the backwash filter are as follows. Figure 4 , Figure 5 As shown, Figure 4 The hollow arrows in the diagram indicate the direction of gas flow. Figure 5 The arrows in the diagram indicate the direction of liquid flow.

[0031] In specific embodiments of this utility model, such as Figure 2 As shown, the backwash filter 1 includes a housing 5 and multiple filter elements 4 inside. The upper end of the inner cavity of each filter element 4 is connected to a main pipe 6. One end of the main pipe 6 has an inlet connected to an inlet pipe 8 via valve I7, and the other end has an outlet connected to an exhaust fan 2 via valve II9. The lower end of each filter element 4 is sealed and fixed to a support plate 10. The support plate 10 between adjacent filter elements 4 is provided with mesh holes 11 for the cleaning fluid to pass through. Figure 7 As shown; valve III12 is provided at the air inlet, and the air inlet is located on the side wall of the housing 5 above the support plate 10; valve IV13 is provided at the bottom middle outlet of the housing 5. When feeding and filtering dust, valves II9 and III12 are opened, and valves I7 and IV13 are closed. The exhaust gas containing material and dust enters the housing, and the gas enters the inner cavity of the filter element 4 after being filtered. The material is trapped on the outside of the filter element 4. The filtered gas flows from the end of the filter element 4 to the main pipe 6 and is discharged. During backwashing, valves I7 and IV13 are opened, and valves II9 and III12 are closed. Drinking water enters the housing 5 from the water inlet pipe 8 to rinse the material on the outer wall of the filter element 4. The cleaning liquid is discharged from the bottom outlet and returned to the feeding tank 00. This structure can improve the filtration effect.

[0032] Further optimize the above solution, such as Figure 2As shown, the bottom of the shell 5 is provided with a discharging cavity 14 with a large top and a small bottom, the support plate 10 is arranged on the top of the discharging cavity 14, and the valve IV 13 is arranged outside the bottom outlet of the discharging cavity 14. With the structure, the material washed down by the filter element can be prevented from being retained at the bottom of the shell, and the material recovery rate is improved.

[0033] Specifically, as shown in the drawings, Figure 3 , Figure 7 The shell 5 is cylindrical, one filter element 4 is arranged in the middle of the shell 5, and the other filter elements 4 are arranged in a circumferential direction at intervals; the main pipe 6 comprises an annular pipe 61 and a radial connecting pipe 62 in communication with the annular pipe 61, the annular pipe 61 is in communication with the inner cavities of the circumferentially arranged filter elements 4 through branch pipes 60, the connecting pipe 62 can be in communication with the inner cavity of the middle filter element 4; and the air inlet is arranged at the bottom of the side wall of the shell 5. In production, the main pipe and the branch pipe can be connected by a stainless steel pipe or a steel wire hose; the filter element is a titanium rod filter element, and the shell is made of stainless steel. With the above structure, the design is more compact, the volume is small, and the processing and production are convenient.

[0034] In the specific embodiment of the utility model, as shown in the drawings, Figure 6 The scraping mechanism comprises a flat plate 15, a plurality of push-pull rods 16 and a plurality of annular scrapers 17, the annular scrapers 17 are sleeved on the outer wall of the filter element 4, the edges of the middle annular scraper 17 are connected with the annular scrapers 17 around through connecting rods 18, the push-pull rods 16 are vertically fixed on the connecting rods 18, the push-pull rods 16 are sealingly and slidingly matched with the rod holes on the top wall of the shell 5, the top of the plurality of push-pull rods 16 is connected with the bottom surface of the flat plate 15 above the shell 5; and the number of the push-pull rods 16 is not greater than the number of the annular scrapers 17. The plurality of annular scrapers can be synchronously lifted and lowered by the lifting of the flat plate, the material outside the filter element can be completely scraped, and the filtering effect of the filter element is further improved.

[0035] In production, the flat plate 15 is connected with a lifting mechanism, and the lifting mechanism is used to drive the flat plate 15 to lift and drive the annular scrapers 17 to slide up and down along the surface of the filter element 4. The lifting mechanism can be an electric push rod or an air cylinder, the electric push rod or the air cylinder is installed on a fixed object outside the backwashing filter, and the movable end of the electric push rod or the air cylinder is connected with the flat plate, so that the flat plate and the plurality of annular scrapers below the flat plate can be synchronously lifted and lowered after being started.

[0036] Further optimization of the above scheme, as shown in the drawings, Figure 1 A wire mesh trap 19 is arranged on the pipeline between the air suction machine 2 and the backwashing filter 1, and is used to filter impurities in the air inlet of the air suction machine 2. The wire mesh trap can be purchased, and the wire mesh trap can intercept the particulate impurities in the gas, so that the air suction machine is prevented from being damaged or blocked, and the service life of the air suction machine is improved.

[0037] In conclusion, the utility model has the advantages of compact structure and good filtering effect, filters dust in the feeding process through backwashing filter, and further purifies the filtered gas through the exhaust fan to be delivered to the tail gas treatment system, so that the purpose of reaching the discharge standard is achieved; when the filtering effect is reduced, the filtering effect is improved by backwashing the filter element, and the washing liquid is returned to the feeding tank for recycling, thereby reducing material waste; meanwhile, the powder on the surface of the filter element that cannot be washed off is removed by the scraping mechanism, thereby thoroughly cleaning the filter element.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the utility model, and not for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model, should be included in the scope of protection of the utility model claims.

Claims

1. A dust purification and recovery device for feeding, characterized by: The backflush filter is connected with the exhaust pipe of the feeding tank, and the air outlet of the backflush filter is connected with the air inlet of the air extractor.

2. The dust purification and recovery device for feeding according to claim 1, characterized in that: The backflush filter comprises a shell and a plurality of filter cores inside the shell.

3. The dust purification and recovery device for feeding according to claim 2, characterized in that: The bottom of the shell is provided with a discharging cavity which is large at the top and small at the bottom.

4. The dust purification and recovery device for feeding according to claim 2, characterized in that: The shell is cylindrical, and one filter core is arranged in the middle of the shell, and the other filter cores are arranged in a circumferential direction.

5. The dust purification and recovery device for feeding according to claim 4, characterized in that: The backflush mechanism comprises a flat plate, a plurality of push-pull rods and a plurality of annular scrapers.

6. The dust purification and recovery device for feeding according to claim 5, characterized in that: The flat plate is connected with a lifting mechanism.

7. The dust purification and recovery device for feeding according to claim 6, characterized in that: The lifting mechanism is used to drive the flat plate to lift and drive the annular scrapers to slide up and down along the surface of the filter core.

8. A dust purification and recovery device for feeding according to any one of claims 1 to 7, characterized in that: The lifting mechanism is an electric push rod or a pneumatic cylinder. A wire mesh trap is arranged on the pipeline between the air extractor and the backflush filter.

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