Dry filter for purifying carbon roasting flue gas

Abstract

The utility model relates to a dry-type filter for purifying carbon roasting flue gas, which comprises a shell, a first single-rod hydraulic cylinder is arranged at the outer top of the shell, a piston rod of the first single-rod hydraulic cylinder is fixedly connected with a cover plate in a forward manner, the cover plate is propped against the outer wall of the front side of the shell, and a metal filter screen is detachably arranged on the rear side of the cover plate; a collecting hopper is fixedly connected to the outer bottom of the shell, a steam input pipeline is arranged on one side of the exterior of the collecting hopper, and a first steam branch pipe and a second steam branch pipe are connected to the tail end of the steam input pipeline in parallel; the first steam branch pipe extends into the collecting hopper, the tail end of the first steam branch pipe extends upwards into the shell on the side, close to the air outlet, of the metal filter screen, a second single-rod hydraulic cylinder is arranged at the bottom of the shell on the side, close to the air outlet, of the metal filter screen, and a piston rod of the second single-rod hydraulic cylinder is fixedly connected with an inverted-L-shaped lifting plate upwards. The utility model can heat tar, adopts the metal filter screen which can be disassembled and assembled and can be purged by steam, and is more practical.

Description

TECHNICAL FIELD

[0001] The utility model belongs to waste gas treatment technical field, concretely relates to a dry filter for carbon baking flue gas purification. BACKGROUND

[0002] At present, when the flue gas generated by carbon baking is purified, a dry filter is usually used to filter out dust, tar and other impurities in the flue gas, but the filter material used in the conventional dry filter is mostly filter cotton or coiled filter cloth, which consumes a large amount of material in actual filtering operation, and the tar filtered out is deposited at the bottom of the filter, which needs to be cleaned manually, and the tar is also easy to harden and condense into blocks due to low temperature, further increasing the difficulty and labor intensity of manual cleaning, which needs to be improved. CONTENT OF UTILITY MODEL

[0003] Therefore, the utility model aims at providing a dry filter for carbon baking flue gas purification, which can heat tar and use a metal filter screen that can be disassembled and steam purged, to solve the above problems.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the technical scheme: a dry filter for carbon baking flue gas purification, including the shell, both ends of the shell are fixedly connected with the tapered transition pipe, the port of a tapered transition pipe is the air inlet, the port of another tapered transition pipe is the air outlet, the outer top of the shell is fixedly provided with the first single rod hydraulic cylinder along the front and back direction, the piston rod of the first single rod hydraulic cylinder is towards the front and is fixedly connected with the cover plate, the cover plate is abutted on the front side outer wall of the shell and the rear side of which is detachably provided with the metal filter screen, the front side of the shell corresponding to the metal filter screen is provided with the through slot, the metal filter screen is inserted into the shell through the through slot and the upper and lower ends and the rear side of which are all abutted with the inner wall of the shell, the bottom of the shell on the side of the metal filter screen close to the air inlet is provided with the blowdown port, the outer bottom of the shell is fixedly connected with the collecting hopper, one side of the collecting hopper is provided with the steam input pipeline, the tail end of the steam input pipeline is connected with the first steam branch pipe and the second steam branch pipe, the first steam branch pipe and the second steam branch pipe are all provided with the control valve, the first steam branch pipe is inserted into the collecting hopper and the tail end thereof is inserted into the shell on the side of the metal filter screen close to the air outlet, the bottom of the shell on the side of the metal filter screen close to the air outlet is fixedly provided with the second single rod hydraulic cylinder, the piston rod of the second single rod hydraulic cylinder is upwards and is fixedly connected with the inverted L-shaped lifting plate, the horizontal part of the lifting plate is hollow and is connected with the tail end of the first steam branch pipe through the hose, the bottom of the horizontal part of the lifting plate is connected with a plurality of spray heads which are distributed along the front and back direction, the spray heads are downwards inclinedly arranged towards the side of the metal filter screen, the inner wall of the collecting hopper is fixedly provided with the heat exchange coil, the inlet end of the heat exchange coil is connected with the second steam branch pipe, the outlet end is connected with the steam output pipeline, the bottom end of the collecting hopper is connected with the blowdown pipe with the blowdown valve.

[0005] Preferably, the upper and lower parts of the front side of the metal filter screen are fixedly provided with the plug, the opposite sides of the two plugs are both provided with the limiting blind hole, the cover plate corresponding to the plug is provided with the insertion slot, the front side of the cover plate between the two insertion slots is fixedly provided with the double rod hydraulic cylinder, the front side of the metal filter screen is abutted on the rear side of the cover plate, the plug is inserted into the corresponding insertion slot, the two piston rods of the double rod hydraulic cylinder are corresponding and connected with the two limiting blind holes.

[0006] Preferably, the plug is matched with the corresponding insertion slot, the piston rod of the double rod hydraulic cylinder is matched with the corresponding limiting blind hole.

[0007] Preferably, the upper and lower parts of the front side outer wall of the shell on one side of the cover plate are fixedly provided with the motor, the output shaft of the motor is fixedly sleeved with the locking plate towards the front, and the locking plate is abutted on the front side of the cover plate.

[0008] Preferably, the rear side of the cover plate and the upper and lower and rear side of the metal filter screen are all fixedly provided with the sealing gasket.

[0009] Preferably, the inner and outer walls of the shell, the conical transition pipe and the collecting hopper are provided with a foamed aluminum coating.

[0010] The beneficial effects of the utility model are as follows: when the flue gas generated by roasting flows through the shell from the air inlet to the air outlet, the metal filter screen in the shell can effectively intercept and filter out the dust and tar impurities in the waste gas, part of the filtered dust and tar can directly fall into the collecting hopper through the blowdown port, and the other part remains on the metal filter screen. At the same time, the control valve on the second steam branch pipe can be opened to input steam into the heat exchange coil, so that the heat exchange coil can heat the inside of the collecting hopper, the tar falling into the collecting hopper can be kept at a certain temperature and be in a softened and flowable state, and the tar can be prevented from hardening and coagulating into blocks. After a period of time, the control valve on the first steam branch pipe can be opened after temporary shutdown to input steam into the inside of the horizontal part of the lifting plate through the first steam branch pipe and the hose, and the steam can be sprayed towards the metal filter screen through the spray head, and the reciprocating movement of the lifting plate driven by the extension and retraction of the piston rod of the second single-rod hydraulic cylinder can realize the overall steam blowing treatment of the metal filter screen, and the dust and tar remaining on the metal filter screen can be effectively blown off and fall into the collecting hopper through the blowdown port. After a certain period of time, the blowdown valve can be opened to discharge the collected dust, tar and other impurities through the blowdown pipe. In this way, the metal filter screen is used to replace the original filter cotton or filter cloth and other filter materials, and the metal filter screen can be regularly subjected to overall steam blowing and cleaning treatment, the filter efficiency and quality can be ensured, the consumption of filter materials can be avoided, the utility model is more economical and practical, the dust and tar filtered and blown off can be collected in the collecting hopper, the tar can be effectively heated to keep the tar in a softened and flowable state, the blowdown valve can be regularly opened to automatically discharge the dirt in the collecting hopper, manual cleaning is not needed, the overall operation is simpler and more convenient, the labor intensity and difficulty of workers can be greatly reduced, and the utility model is more convenient and practical. In addition, the extension of the piston rod of the first single-rod hydraulic cylinder can drive the cover plate and the metal filter screen to move forward as a whole, so that the metal filter screen can be completely pulled out of the shell, and the metal filter screen can be disassembled through the detachable connection between the metal filter screen and the cover plate, the metal filter screen can be conveniently replaced when the metal filter screen is damaged, the filter effect can be further ensured, and the use of the filter is more flexible and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is the front view structural schematic diagram of the utility model;

[0012] Figure 2 is the front view sectional structure schematic diagram of the shell and the collecting hopper of the utility model;

[0013] Figure 3 is the left view sectional structure schematic diagram of the shell of the utility model;

[0014] Figure 4 Fig. 3 is a left view of the shell when the metal filter is extracted;

[0015] Figure 5 Fig. 4 is a top view of the shell;

[0016] Figure 6 Fig. 5 is a left view of the cover plate;

[0017] Figure 7 Fig. 6 is a left view of the metal filter;

[0018] Figure 8 Fig. 7 is a left view of the metal filter and the cover plate when they are connected;

[0019] Figure 9 Fig. 8 is a front view of the lifting plate.

[0020] In the figure, 1 is the shell, 2 is the conical transition pipe, 3 is the air inlet, 4 is the air outlet, 5 is the first single-rod hydraulic cylinder, 6 is the cover plate, 7 is the metal filter, 8 is the through slot, 9 is the blowdown port, 10 is the collecting hopper, 11 is the steam input pipeline, 12 is the first steam branch pipe, 13 is the second steam branch pipe, 14 is the control valve, 15 is the second single-rod hydraulic cylinder, 16 is the lifting plate, 17 is the hose, 18 is the spray head, 19 is the heat exchange coil, 20 is the steam output pipeline, 21 is the blowdown valve, 22 is the blowdown pipe, 23 is the plug, 24 is the limiting blind hole, 25 is the insertion slot, 26 is the double-rod hydraulic cylinder, 27 is the motor, 28 is the locking plate, and 29 is the sealing gasket. DETAILED DESCRIPTION

[0021] The utility model will be described in further detail below in combination with the drawings and specific embodiments:

[0022] As Figures 1 to 9As shown, a kind of carbon calcination flue gas purification dry filter, including shell 1, the left and right ends of shell 1 are fixedly connected with conical transition pipe 2, the port of one conical transition pipe 2 is air inlet 3, the port of another conical transition pipe 2 is air outlet 4. The outer top of shell 1 is fixed with first single-rod hydraulic cylinder 5 along front-back direction, the piston rod of first single-rod hydraulic cylinder 5 faces forward and is fixedly connected with cover plate 6, cover plate 6 is abutted on the front side outer wall of shell 1 and detachably provided with metal filter screen 7 on its back side, metal filter screen 7 is correspondingly provided with through slot 8 on the front side of shell 1, metal filter screen 7 extends into shell 1 through through slot 8 and its upper and lower ends and back side are all abutted with the inner wall of shell 1. The bottom of shell 1 on the side of metal filter screen 7 close to air inlet 3 is provided with blowdown port 9. The outer bottom of shell 1 is fixedly connected with collecting hopper 10, the outer side of collecting hopper 10 is provided with steam input pipeline 11, the tail end of steam input pipeline 11 is connected with first steam branch pipe 12 and second steam branch pipe 13 in parallel, control valve 14 is arranged on first steam branch pipe 12 and second steam branch pipe 13, first steam branch pipe 12 extends into collecting hopper 10 and its tail end extends into the shell 1 on the side of metal filter screen 7 close to air outlet 4 upward. The bottom of shell 1 on the side of metal filter screen 7 close to air outlet 4 is vertically fixed with second single-rod hydraulic cylinder 15, the piston rod of second single-rod hydraulic cylinder 15 faces upward and is fixedly connected with inverted L-shaped lifting plate 16, the horizontal part of lifting plate 16 is hollowly arranged and is connected with the tail end of first steam branch pipe 12 through hose 17, the bottom of horizontal part of lifting plate 16 is connected with several spray heads 18 distributed along front-back direction, spray heads 18 are downwardly inclinedly arranged towards the side of metal filter screen 7. Heat exchange coil 19 is fixed on the inner wall of collecting hopper 10, the inlet end of heat exchange coil 19 is connected with second steam branch pipe 13 and the outlet end is connected with steam output pipeline 20. The bottom end of collecting hopper 10 is connected with blowdown pipe 22 with blowdown valve 21;

[0023] When the flue gas generated by the roasting flows through the shell 1 from the air inlet 3 to the air outlet 4, the dust and tar impurities in the waste gas can be effectively intercepted and filtered out by using the metal filter screen 7 in the shell 1. Part of the filtered dust and tar can directly fall into the collecting hopper 10 through the pollution discharge port 9, and the other part remains on the metal filter screen 7. At the same time, the control valve 14 on the second steam branch pipe 13 can be opened to input steam into the heat exchange coil 19, so that the inside of the collecting hopper 10 can be heated by the heat exchange coil 19 to keep the tar falling into the collecting hopper 10 at a certain temperature and in a softened and flowable state, avoiding the hardening and coagulation of the tar into blocks. After a period of time, the control valve 14 on the first steam branch pipe 12 can be opened after temporary shutdown to input steam into the inside of the horizontal part of the lifting plate 16 through the first steam branch pipe 12 and the hose 17, and sprayed towards the metal filter screen 7 through the spray head 18, cooperating with the extension and retraction of the piston rod of the second single-rod hydraulic cylinder 15 to drive the up-and-down reciprocating movement of the entire lifting plate 16, so as to realize the overall steam blowing treatment of the metal filter screen 7, which can effectively blow off the dust and tar remaining on the metal filter screen 7 and make them fall into the collecting hopper 10 through the pollution discharge port 9. After a certain period of time, the pollution discharge valve 21 can be opened to discharge the collected dust, tar and other impurities through the pollution discharge pipe 22. In this way, the metal filter screen 7 replaces the original filter cotton or filter cloth and other filter materials, and can be regularly subjected to overall steam blowing and cleaning treatment, which can ensure the filtering efficiency and quality while avoiding the large consumption of filter materials, and is more economical and practical. The dust and tar filtered and blown off can be collected in the collecting hopper 10, and the tar can be effectively heated to keep it in a softened and flowable state, so that the pollution in the collecting hopper 10 can be automatically discharged by regularly opening the pollution discharge valve 21, without the need for manual and manual cleaning, which is more simple and convenient, and can greatly reduce the labor intensity and difficulty of workers, and is more convenient and practical. In addition, by extending the piston rod of the first single-rod hydraulic cylinder 5, the cover plate 6 and the metal filter screen 7 can be moved forward as a whole, so that the metal filter screen 7 can be completely extracted from the shell 1, and then the metal filter screen 7 can be disassembled through the detachable connection between the metal filter screen 7 and the cover plate 6, so that the metal filter screen 7 can be conveniently replaced when it is damaged or fails, thereby ensuring the filtering effect and making the use of the filter more flexible and convenient.

[0024] In the embodiment, the upper and lower parts of the front side of the metal filter screen 7 are fixedly provided with the insertion plates 23, the opposite sides of the two insertion plates 23 are each provided with a limiting blind hole 24, the corresponding cover plate 6 is provided with an insertion slot 25, the front side of the cover plate 6 between the two insertion slots 25 is vertically fixedly provided with a double-rod hydraulic cylinder 26, the front side of the metal filter screen 7 abuts against the rear side of the cover plate 6, the insertion plate 23 is inserted and connected with the corresponding insertion slot 25, and the two piston rods of the double-rod hydraulic cylinder 26 are correspondingly connected with the two limiting blind holes 24, so that after the metal filter screen 7 is pulled out, the double-rod hydraulic cylinder 26 can be operated to make the two piston rods retract, the insertion of the insertion plate 23 is released, the insertion plate 23 is pulled out, and the original metal filter screen 7 can be disassembled. Then, after a new metal filter screen 7 is taken, the insertion plate 23 on the new metal filter screen 7 can be aligned with the insertion slot 25 and inserted into the insertion slot 25, the limiting blind hole 24 is aligned with the piston rod of the double-rod hydraulic cylinder 26, then the double-rod hydraulic cylinder 26 is operated to make the two piston rods extend and be inserted into the corresponding limiting blind hole 24, the insertion plate 23 is fixed, and the fixing and installation of the new metal filter screen 7 can be completed. Then, the first single-rod hydraulic cylinder 5 is operated again to make the piston rod retract, drive the cover plate 6 and the metal filter screen 7 to move backward, and abut against the front side of the shell 1, so that the metal filter screen 7 is inserted into the shell 1 through the through slot 8 and is fixed, and the use can be continued. In this way, the metal filter screen 7 can be conveniently disassembled and replaced, and is more practical.

[0025] In the embodiment, the insertion plate 23 is matched with the corresponding insertion slot 25, and the piston rod of the double-rod hydraulic cylinder 26 is matched with the corresponding limiting blind hole 24.

[0026] In the embodiment, the upper and lower parts of the front side of the shell 1 on one side of the cover plate 6 are fixedly provided with motors 27, the output shafts of the motors 27 are fixedly sleeved with locking plates 28, the locking plates 28 abut against the front side of the cover plate 6, the motors 27 can be operated when the cover plate 6 abuts against the front side of the shell 1, the locking plates 28 are driven to rotate to the horizontal state, the locking plates 28 abut against the front side of the cover plate 6, the cover plate 6 is effectively locked and positioned, and when the metal filter screen 7 needs to be replaced, the motors 27 can be operated to drive the locking plates 28 to rotate to the vertical state, the cover plate 6 is unlocked, and the metal filter screen 7 can be pulled out and replaced according to the foregoing steps. In this way, the cover plate 6 can be further locked and positioned, and the filtration and purification operation of flue gas can be more smoothly performed.

[0027] In the embodiment, the rear side of the cover plate 6 and the upper and lower and rear sides of the metal filter screen 7 are fixedly provided with sealing pads 29, so as to ensure the sealing effect between the cover plate 6 and the shell 1 and between the metal filter screen 7 and the shell 1, the filtration operation can be smoothly performed, and gas leakage can be avoided.

[0028] In the embodiment, the inner and outer walls of the shell 1, the conical transition pipe 2 and the collecting hopper 10 are all provided with a foamed aluminum coating (not shown in the figure), which is a prior material and has the characteristics of small density, high specific rigidity, high impact absorption capacity, high damping shock absorption, high temperature resistance, strong fireproof performance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding property, strong weather resistance, filtering capacity, easy processing, easy installation, high forming precision, surface coating and the like, which can effectively improve the working stability and corrosion resistance of the whole filter, ensure the service life and be more practical.

[0029] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dry filter for cleaning carbon baking flue gas, comprising a shell, a tapered transition pipe is fixedly communicated with the left and right ends of the shell, the port of one tapered transition pipe is an air inlet, and the port of the other tapered transition pipe is an air outlet, characterized in that, The outer top of the shell is fixed with a first single-rod hydraulic cylinder in the front-rear direction, the piston rod of the first single-rod hydraulic cylinder is forward and fixedly connected with a cover plate, the cover plate abuts on the front side outer wall of the shell and a metal filter screen is detachably arranged on the rear side of the cover plate, a through slot is formed on the front side of the shell corresponding to the metal filter screen, the metal filter screen extends into the shell through the through slot and the upper and lower ends and the rear side of the metal filter screen abut on the inner wall of the shell, a blowdown port is formed through the bottom of the shell on the side of the metal filter screen close to the air outlet, a collecting hopper is fixedly connected to the outer bottom of the shell, a steam input pipeline is arranged on one side of the outer portion of the collecting hopper, a first steam branch pipe and a second steam branch pipe are connected in parallel at the tail end of the steam input pipeline, control valves are arranged on the first steam branch pipe and the second steam branch pipe, the first steam branch pipe extends into the collecting hopper and the tail end thereof extends upward into the shell on the side of the metal filter screen close to the air outlet, a second single-rod hydraulic cylinder is fixedly arranged vertically through the bottom of the shell on the side of the metal filter screen close to the air outlet, the piston rod of the second single-rod hydraulic cylinder is upward and fixedly connected with an inverted L-shaped lifting plate, the horizontal portion of the lifting plate is hollow and communicates with the tail end of the first steam branch pipe through a hose, the bottom of the horizontal portion of the lifting plate communicates with a plurality of nozzles which are distributed at intervals in the front-rear direction, the nozzles are downwardly inclined towards the side of the metal filter screen, a heat exchange coil is fixedly arranged on the inner wall of the collecting hopper, the inlet end of the heat exchange coil communicates with the second steam branch pipe and the outlet end thereof communicates with a steam output pipeline, and a blowdown pipe with a blowdown valve is connected to the bottom end of the collecting hopper.

2. The dry filter for cleaning carbon baking off-gas according to claim 1, characterized by The front side of the metal filter screen is fixed with two plug plates, limit blind holes are formed on the opposite sides of the two plug plates, plug slots are formed through the cover plate corresponding to the plug plates, a double-rod hydraulic cylinder is fixed vertically on the front side of the cover plate between the two plug slots, the front side of the metal filter screen abuts on the rear side of the cover plate, the plug plates are inserted through the plug slots, and the two piston rods of the double-rod hydraulic cylinder correspond to and are connected to the two limit blind holes.

3. The dry filter for cleaning carbon baking off-gas according to claim 2, characterized by The plug plates correspond to the plug slots, and the piston rods of the double-rod hydraulic cylinder correspond to the limit blind holes.

4. The dry filter for cleaning carbon baking off-gas according to claim 1, characterized by The front side outer wall of the shell on one side of the cover plate is fixed with two motors, the output shafts of the motors are forward and fixedly sleeved with locking plates, and the locking plates abut on the front side of the cover plate.

5. The dry filter for cleaning carbon baking off-gas according to claim 1, characterized by Sealing gaskets are fixed on the rear side of the cover plate and the upper and lower sides and the rear side of the metal filter screen.

6. The dry filter for cleaning carbon baking off-gas according to claim 1, characterized by Foamed aluminum coatings are arranged on the inner and outer walls of the shell, the conical transition pipe and the collecting hopper.

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