Calcium carbide furnace furnace flue recycling system

Abstract

The utility model relates to a calcium carbide furnace flue gas recycling system, including bottom plate and install in bottom plate top calcium carbide production main part, heat recovery tank and purification main part, the output of calcium carbide production main part is fixed with heat recovery pipe, the output of heat recovery pipe is connected with the input of purification main part, is provided with heat recovery circulation water supply mechanism on heat recovery tank, the upper and lower ends of heat recovery tank inner chamber all are provided with cleaning part, and heat recovery pipe bottom installs dust collection spare, is provided with two crosspieces in bottom plate inner chamber, the upper crosspiece is provided with through -hole, the lower crosspiece is provided with blanking hole, is provided with the push -plate between two crosspieces, and the push -plate is provided telescopic pneumatic cylinder away from the side of through -hole, is provided with the through groove on the outside wall of bottom plate, is provided with the receiving hopper in the through groove. The utility model has not only can conveniently recycle and utilize the waste heat in flue gas, but also can avoid the influence of dust on heat transfer, and also can conveniently clean the dust in the inner chamber of bottom plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to calcium carbide production technical field, specifically point to a kind of calcium carbide furnace flue gas recycling system. BACKGROUND

[0002] At present, in calcium carbide furnace production of chemical industry, the flue gas treatment generated during low load operation and abnormal calcium carbide furnace operation has become the most concerned problem of environmental protection department. In the process of calcium carbide production, a large amount of smoke dust is generated, and a large amount of waste heat is wrapped in these smoke dust, and the existing dust-containing flue gas treatment device for calcium carbide production is not ideal for waste heat recovery.

[0003] In order to solve this technical problem, the prior art provides CN218329353U a kind of dust-containing flue gas treatment device for calcium carbide production, the heat contained in flue gas is transferred to tap water in heat recovery tank through heat recovery pipe, the heat recovery pipe meanders in heat recovery tank, this prolongs the time of flue gas staying in heat recovery pipe, so that the heat in flue gas can be better absorbed by tap water in heat recovery tank, the transmission rod is rotated by driving motor, the scraper is rotated by transmission rod, the dust on the side wall in the inner cavity of heat recovery pipe is scraped off, and then under the action of collection fan, the dust is sucked into the inner cavity of bottom plate through collection pipe, which effectively avoids the influence of dust on heat transfer.

[0004] But it may have certain technical problems in use process, for example: the device needs to send the dust scraped off from the side wall in the inner cavity of heat recovery pipe into the inner cavity of bottom plate under the driving of collection fan through collection pipe, and then the dust in the inner cavity of bottom plate is taken out through the ash hole provided on the bottom plate, and because there is no mechanism for dust guiding in the inner cavity of bottom plate, the dust will not be concentrated in one place when entering the inner cavity of bottom plate, which may cause inconvenience to workers when taking ash, and it is inconvenient for workers to clean the dust in the inner cavity of bottom plate. UTILITY MODEL CONTENTS

[0005] The utility model provides a calcium carbide furnace flue gas recycling system which can not only conveniently recycle waste heat in flue gas, but also avoid the influence of dust on heat transfer, and conveniently clean the dust in the inner cavity of bottom plate.

[0006] The utility model discloses a calcium carbide furnace flue gas recycling system, including bottom plate and install in bottom plate top and along left and right direction distribution calcium carbide production main body, heat recovery tank and purification main body in proper order, the output of calcium carbide production main body is fixed with heat recovery pipe, heat recovery pipe extends to heat recovery tank inside, the output of heat recovery pipe is linked with the input of purification main body, be provided with heat recovery circulation water supply mechanism on heat recovery tank, the upper and lower both ends of heat recovery tank inner chamber all are provided with cleaning part, and the cleaning end of cleaning part extends to heat recovery pipe inner chamber, the bottom of heat recovery pipe is installed with dust collection spare with heat recovery pipe inside lead through, the output of dust collection spare extends to bottom plate inner chamber, be provided with two horizontal plates in bottom plate inner chamber and with the circumferential closure of bottom plate inner chamber lateral wall and distribute along the vertical, the through -hole that is suitable for with dust collection spare output is seted up on the upper horizontal plate on the upper side, the blanking port that is located the right side of through -hole is seted up on the lower side horizontal plate, and the push -plate that is located the side that through -hole is away from blanking port is seted up between two horizontal plates, and the front and back both ends of blanking port and push -plate all with the front and back lateral wall of horizontal plate are in line, and the upper and lower both ends of push -plate are respectively with the upper and lower two horizontal plates and stick together, and the side that push -plate is away from through -hole is provided with telescopic pneumatic cylinder of making push -plate left and right movement, be provided with the receiving hopper of the position that is located blanking port below on the lateral wall of bottom plate on the through -groove.

[0007] The utility model discloses a bottom plate and install the bottom plate top and distribute in order along left and right direction's electric stone production main part, heat recovery tank and purification main part, the output of electric stone production main part is fixed with heat recovery pipe, and heat recovery pipe extends to heat recovery tank inside, and the output of heat recovery pipe is linked with the input of purification main part, is provided with heat recovery circulation water supply mechanism on heat recovery tank, and both ends of heat recovery tank inner chamber all are provided with cleaning part, and the cleaning end of cleaning part extends to heat recovery pipe inner chamber, and the dust collection piece that is communicated with heat recovery pipe inside is installed at heat recovery pipe bottom, and the output of dust collection piece extends to bottom plate inner chamber, and the two horizontal plates that are distributed along the vertical direction and are closed with the lateral wall of bottom plate inner chamber are provided in bottom plate inner chamber, the through -hole that is matched with the output of dust collection piece is seted up on the upper horizontal plate, the blanking port that is located the right side of through -hole is seted up on the lower horizontal plate, and the push -plate that is located the side of through -hole away from blanking port is seted up between the two horizontal plates, and the front and back two ends of blanking port and push -plate all are with the front and back two lateral walls of horizontal plate, and the upper and lower two ends of push -plate are respectively with the upper and lower two horizontal plates that adhere, and the telescopic pneumatic cylinder that makes push -plate left and right movement is seted up on the side of push -plate away from through -hole, and the through -slot is seted up on the lateral wall of bottom plate, and the receiving hopper that is located the position below blanking port is seted up in through -slot, when using, through starting electric stone production main part, makes the flue gas that electric stone production main part discharges into heat recovery pipe, from heat recovery pipe into purification main part to the outside from purification main part, and then start heat recovery circulation water supply mechanism, and water is supplied to heat recovery tank, and the heat contained in flue gas is transferred to the tap water in heat recovery tank through heat recovery pipe, and the tap water after heat exchange is discharged to the outside from heat recovery tank under the drive of heat recovery circulation water supply mechanism, after using the device for a period of time, the dust that the flue gas is wrapped in sticks on the inner chamber lateral wall of heat recovery pipe, through control cleaning part, and the dust on the inner chamber lateral wall of heat recovery pipe is scraped, and then control dust collection piece, and the dust is sucked into the inner chamber of bottom plate in dust collection interval, after the dust is sucked, then again through control telescopic pneumatic cylinder, and the push -plate is driven to move on the horizontal plate towards blanking port direction, so that the dust on the horizontal plate is also moved towards blanking port direction under the drive of push -plate, and falls into receiving hopper through blanking port, and then the receiving hopper is taken out from through -slot, so that the dust in receiving hopper is cleaned, which not only can conveniently recycle the waste heat in flue gas, but also can avoid the influence of dust on heat transfer, and conveniently clean the dust in the inner chamber of bottom plate.

[0008] As preferred, the heat recovery circulating water supply mechanism comprises a second water pump installed on the top of the heat recovery tank, the input end of the second water pump is communicated with the external tap water pipe, the output end of the second water pump extends into the heat recovery tank, the first water pump is installed on the top of the bottom plate, the input end of the first water pump extends into the heat recovery tank and is communicated with the output end of the second water pump, and the output end of the first water pump is communicated with the external domestic water pipe. The heat recovery circulating water supply mechanism comprises a second water pump installed on the top of the heat recovery tank, the input end of the second water pump is communicated with the external tap water pipe, the output end of the second water pump extends into the heat recovery tank, the first water pump is installed on the top of the bottom plate, the input end of the first water pump extends into the heat recovery tank and is communicated with the output end of the second water pump, and the output end of the first water pump is communicated with the external domestic water pipe. When the device is in use, tap water is extracted from the external tap water pipe by the second water pump, and the tap water is delivered into the heat recovery tank for heat exchange. Then, the first water pump extracts the tap water after heat exchange and delivers it into the external domestic water pipe. In this way, the heat recovery circulating water supply mechanism can conveniently supply water to the heat recovery tank for heat exchange.

[0009] As preferred, the cleaning member comprises a cleaning motor fixedly installed in the inner cavity of the heat recovery tank, and a transmission rod connected to the output end of the cleaning motor, and a plurality of scrapers arranged at equal intervals on the outer surface of the transmission rod. The cleaning member comprises a cleaning motor fixedly installed in the inner cavity of the heat recovery tank, a transmission rod connected to the output end of the cleaning motor, and a plurality of scrapers arranged at equal intervals on the outer surface of the transmission rod. When the device is in use, the transmission rod is rotated by the cleaning motor, and the scrapers are rotated by the transmission rod. In this way, the scrapers can scrape off the dust on the side wall of the inner cavity of the heat recovery pipe.

[0010] As preferred, the dust collecting member comprises a collecting pipe communicated with the bottom of the heat recovery pipe, a collecting fan fixedly installed in the inner cavity of the collecting pipe, and a discharge valve arranged above the collecting fan on the collecting pipe. The dust collecting member comprises a collecting pipe communicated with the bottom of the heat recovery pipe, a collecting fan fixedly installed in the inner cavity of the collecting pipe, and a discharge valve arranged above the collecting fan on the collecting pipe. When the device is in use, the discharge valve is opened and the collecting fan is started. The dust is sucked into the inner cavity of the bottom plate through the collecting pipe under the action of the collecting fan, and enters between the two horizontal plates through the through hole. After the dust is collected, the collecting fan and the discharge valve are closed to prevent the smoke from entering the inner cavity of the bottom plate. In this way, the staff can conveniently collect the dust in the heat recovery pipe, and the smoke can not enter the inner cavity of the bottom plate when the device is not collecting the dust in the heat recovery pipe.

[0011] Preferably, the upper and lower ends of the receiving hopper are respectively attached to the bottom of the lower transverse plate and the inner bottom wall of the bottom plate, and the left and right inner side walls of the receiving hopper are flush with the left and right ends of the material falling port. By making the upper and lower ends of the receiving hopper respectively attached to the bottom of the lower transverse plate and the inner bottom wall of the bottom plate, and the left and right inner side walls of the receiving hopper are flush with the left and right ends of the material falling port, it is convenient to push the plate to drive the dust into the receiving hopper.

[0012] Preferably, a handle is fixed on the outer side wall of the receiving hopper. By fixing a handle on the outer side wall of the receiving hopper, the worker can easily take out the receiving hopper from the through slot by using the handle.

[0013] Preferably, the output end of the calcium carbide production main body is communicated with the input end of the heat recovery pipe through a contraction pipe. By making the output end of the calcium carbide production main body communicated with the input end of the heat recovery pipe through a contraction pipe, the contraction pipe can reduce the activity space of the flue gas and increase the contact area of the flue gas with the inner cavity of the heat recovery pipe.

[0014] The utility model discloses beneficial effect is: through setting up bottom plate and install in bottom plate top and along left and right direction distribution's electric stone production main part, heat recovery tank and purification main part, the output of electric stone production main part is fixed with heat recovery pipe, and heat recovery pipe extends to heat recovery tank inside, and the output of heat recovery pipe is connected with the input of purification main part, and heat recovery tank is provided with heat recovery circulation water supply mechanism, and the upper and lower ends of heat recovery tank inner chamber all are provided with cleaning part, and the cleaning end of cleaning part extends to heat recovery pipe inner chamber, and the bottom of heat recovery pipe is provided with dust collection piece that leads to heat recovery pipe inside, and the output of dust collection piece extends to bottom plate inner chamber, and bottom plate inner chamber is provided with two horizontal plates that distribute along the vertical direction and are closed with bottom plate inner chamber side wall, and the upper horizontal plate is provided with the through -hole that is suitable for the output of dust collection piece, and the lower horizontal plate is provided with the blanking port that is located the right side of through -hole, and the push -plate is located the side that is away from blanking port between two horizontal plates, and the front and back two ends of blanking port and push -plate all are with the front and back two side walls of horizontal plate, and the upper and lower ends of push -plate are respectively with the upper and lower two horizontal plates, and the side that is away from through -hole of push -plate is provided with telescopic pneumatic cylinder that makes push -plate left and right movement, and the outside wall of bottom plate is provided with the through groove, and the through -hole is provided with the receiving hopper that is located blanking port below position, and when using, through starting electric stone production main part, makes the flue gas that electric stone production main part discharges into heat recovery pipe, from heat recovery pipe into purification main part to the outside from purification main part, and then starts heat recovery circulation water supply mechanism, and supplies water to heat recovery tank, and the heat contained in flue gas is transferred to tap water in heat recovery tank through heat recovery pipe, and the tap water after heat exchange is discharged to the outside from heat recovery tank under the drive of heat recovery circulation water supply mechanism, and after using a period of time, the dust that flue gas carries will adhere to the inner chamber side wall of heat recovery pipe, and through controlling cleaning part, the dust on the inner chamber side wall of heat recovery pipe is scraped, and then controls dust collection piece, and makes dust collection interval inhale dust into bottom plate inner chamber, and after inhaling dust, then through controlling telescopic pneumatic cylinder, and the push -plate is driven to move on horizontal plate towards blanking port direction, so that the dust on horizontal plate is also driven to move towards blanking port direction under the drive of push -plate, and falls into receiving hopper through blanking port, and then takes out receiving hopper from the through -hole, so that the dust in receiving hopper is cleaned, which not only can conveniently recover and utilize the waste heat in flue gas, but also can avoid the influence of dust on heat transfer, and conveniently clean the dust in bottom plate inner chamber for staff. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic view of the utility model;

[0016] Figure 2 It is Figure 1 Structure perspective view;

[0017] Figure 3 It is Figure 2 Structure schematic view of A part in;

[0018] The figure shows:

[0019] 1, transmission rod, 2, calcium carbide production main body, 3, bottom plate, 4, contraction pipe, 5, second water pump, 6, purification main body, 7, first water pump, 8, heat recovery tank, 9, heat recovery pipe, 10, handle, 11, telescopic air cylinder, 12, cross plate, 13, cleaning motor, 14, push plate, 15, through hole, 16, collection pipe, 17, receiving hopper, 18, discharging port, 19, scraper, 20, collection fan, 21, discharge valve, 22, through slot. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of the scheme, the following through specific embodiments, the scheme is described.

[0021] As Figures 1-3 The calcium carbide furnace flue gas recycling system of the utility model, including bottom plate 3 and install in bottom plate 3 top and along left and right direction distribution calcium carbide production main body 2, heat recovery tank 8 and purification main body 6 in proper order, the output of calcium carbide production main body 2 is fixedly connected with heat recovery pipe 9, heat recovery pipe 9 extends to heat recovery tank 8 inside, the output of heat recovery pipe 9 is connected with the input of purification main body 6, heat recovery tank 8 is provided with heat recovery cycle water supply mechanism, the upper and lower ends of heat recovery tank 8 inner chamber are all provided with cleaning piece, the cleaning end of cleaning piece extends to heat recovery pipe 9 inner chamber, the bottom of heat recovery pipe 9 is provided with dust collection piece that is communicated with heat recovery pipe 9 inside, the output of dust collection piece extends to bottom plate 3 inner chamber, the inner chamber of bottom plate 3 is provided with two cross plates 12 that are distributed along the vertical direction and are circumferentially closed with the side wall of bottom plate 3 inner chamber, the through hole 15 that is matched with the output of dust collection piece is formed in the upper cross plate 12, the discharging port 18 that is located at the right side of through hole 15 is formed in the lower cross plate 12, the push plate 14 that is located at the side of through hole 15 away from discharging port 18 is arranged between the two cross plates 12, the front and back ends of discharging port 18 and push plate 14 are all aligned with the front and back side walls of cross plate 12, the upper and lower ends of push plate 14 are respectively attached with the upper and lower cross plates 12, the telescopic air cylinder 11 that makes push plate 14 move left and right is arranged at the side of push plate 14 away from through hole 15, the through slot 22 is formed in the outer side wall of bottom plate 3, the receiving hopper 17 that is located at the position below discharging port 18 is arranged in through slot 22.

[0022] The heat recovery circulating water supply mechanism comprises a second water pump 5 installed on the top of the heat recovery tank 8, the input end of the second water pump 5 is communicated with the external tap water pipe, the output end of the second water pump 5 extends into the heat recovery tank 8, a first water pump 7 is installed on the top of the bottom plate 3, the input end of the first water pump 7 extends into the heat recovery tank 8 and is communicated with the output end of the second water pump 5, and the output end of the first water pump 7 is communicated with the external domestic water pipe. When the device is in use, tap water is extracted from the external tap water pipe by the second water pump 5, and then the tap water is delivered into the heat recovery tank 8 for heat exchange. Then the tap water after heat exchange is extracted by the first water pump 7 and delivered into the external domestic water pipe, so that the heat recovery circulating water supply mechanism can conveniently supply water into the heat recovery tank 8 for heat exchange. The cleaning element comprises a cleaning motor 13 fixedly installed in the inner cavity of the heat recovery tank 8, and the output end of the cleaning motor 13 is connected with a transmission rod 1, and a plurality of scrapers 19 are arranged on the outer side surface of the transmission rod 1 at equal intervals. When the device is in use, the transmission rod 1 is driven to rotate by the cleaning motor 13, and the scrapers 19 are driven to rotate by the transmission rod 1, so that the scrapers 19 can scrape off the dust on the side wall in the inner cavity of the heat recovery pipe 9. The dust collecting element comprises a collecting pipe 16 communicated with the bottom of the heat recovery pipe 9, and a collecting fan 20 is fixedly installed in the inner cavity of the collecting pipe 16. The lower end of the collecting pipe 16 is located in the through hole 15, and a discharge valve 21 located above the collecting fan 20 is arranged on the collecting pipe 16. When the device is in use, the discharge valve 21 is opened, and the collecting fan 20 is started, so that the dust is sucked into the inner cavity of the bottom plate 3 through the collecting pipe 16 under the action of the collecting fan 20, and then enters between the two cross plates 12 through the through hole 15. After the dust is collected, the collecting fan 20 and the discharge valve 21 are closed, so that the flue gas cannot enter the inner cavity of the bottom plate 3. In this way, the dust in the heat recovery pipe 9 can be conveniently collected by the staff, and the flue gas cannot enter the inner cavity of the bottom plate 3 when the device does not collect the dust in the heat recovery pipe 9. The upper end and the lower end of the receiving hopper 17 are respectively attached to the bottom of the lower cross plate 12 and the inner bottom wall of the bottom plate 3, and the left and right inner side walls of the receiving hopper 17 are flush with the left and right ends of the discharging port 18, so that the push plate 14 can conveniently drive the dust into the receiving hopper 17. The handle 10 is fixedly connected to the outer side wall of the receiving hopper 17, so that the staff can conveniently take out the receiving hopper 17 from the through slot 22 by the handle 10. The output end of the calcium carbide production main body 2 and the input end of the heat recovery pipe 9 are communicated through the contraction pipe 4, so that the contraction pipe 4 can reduce the activity space of the flue gas and increase the contact area between the flue gas and the inner cavity of the heat recovery pipe 9.

[0023] Combining the drawings Figures 1-3The use method of the utility model is as follows: firstly, the calcium carbide production main body 2 is started, the flue gas discharged from the calcium carbide production main body 2 enters the heat recovery pipe 9 through the contraction pipe 4, enters the purification main body 6 from the heat recovery pipe 9 and is discharged to the outside from the purification main body 6, then the heat recovery circulating water supply mechanism is started, the second water pump 5 extracts tap water from the external tap water pipe and delivers the tap water into the heat recovery tank 8, the heat contained in the flue gas is transferred to the tap water in the heat recovery tank 8 through the heat recovery pipe 9, the tap water after heat exchange is extracted by the first water pump 7 and is delivered into the external domestic water pipe, after the device is used for a period of time, the dust wrapped in the flue gas adheres to the inner cavity side wall of the heat recovery pipe 9, at this time, the transmission rod 1 is rotated by the cleaning motor 13, the scraper 19 is rotated by the transmission rod 1, so that the dust on the inner cavity side wall of the heat recovery pipe 9 is scraped off, after the dust is scraped off, the unloading valve 21 is opened and the collecting fan 20 is started, so that the dust is sucked into the inner cavity of the bottom plate 3 through the collecting pipe 16 under the action of the collecting fan 20 and enters between the two horizontal plates 12 through the through hole 15, after the dust is sucked, the collecting fan 20 and the unloading valve 21 are closed, so that the flue gas does not enter the inner cavity of the bottom plate 3, the push plate 14 is moved on the horizontal plate 12 towards the discharging port 18 direction by controlling the telescopic pneumatic cylinder 11 to extend, so that the dust on the horizontal plate 12 is also moved towards the discharging port 18 direction under the drive of the push plate 14 and falls into the receiving hopper 17 through the discharging port 18, then the receiving hopper 17 is taken out from the through slot 22 by the handle 10, so that the dust in the receiving hopper 17 is cleaned.

[0024] Of course, the above description is not limited to the above examples, the technical features not described in the utility model can be realized by or using the prior art, which will not be described here; the above examples and drawings are only used to illustrate the technical scheme of the utility model and are not limited to the utility model, the ordinary skilled in the art should understand that the changes, modifications, additions or replacements made by the ordinary skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model and should belong to the protection scope of the claims of the utility model.

Claims

1. A calcium carbide furnace flue gas recycling system, comprising a bottom plate (3) and a calcium carbide production main body (2), a heat recovery tank (8) and a purification main body (6) installed on the top of the bottom plate (3) and sequentially distributed along the left-right direction, the output end of the calcium carbide production main body (2) is fixedly connected with a heat recovery pipe (9), the heat recovery pipe (9) extends to the inside of the heat recovery tank (8), the output end of the heat recovery pipe (9) is connected with the input end of the purification main body (6), the heat recovery tank (8) is provided with a heat recovery circulating water supply mechanism, the upper and lower ends of the inner cavity of the heat recovery tank (8) are both provided with a cleaning piece, the cleaning end of the cleaning piece extends into the inner cavity of the heat recovery pipe (9), the bottom of the heat recovery pipe (9) is provided with a dust collecting piece in communication with the inside of the heat recovery pipe (9), the output end of the dust collecting piece extends into the inner cavity of the bottom plate (3), characterized in that: Two transverse plates (12) are arranged in the inner cavity of the bottom plate (3) and are distributed vertically and closed in the circumferential direction of the side wall of the inner cavity of the bottom plate (3), a through hole (15) is formed in the upper transverse plate (12) and is matched with the output end of the dust collecting part, a discharging port (18) is formed in the lower transverse plate (12) and is located on the right side of the through hole (15), a push plate (14) is arranged between the two transverse plates (12) and is located on the side away from the discharging port (18) of the through hole (15), the front and rear ends of the discharging port (18) and the push plate (14) are flush with the front and rear side walls of the transverse plate (12), the upper and lower ends of the push plate (14) are respectively attached to the upper and lower transverse plates (12), and the side away from the through hole (15) of the push plate (14) is provided with a telescopic air cylinder (11) for moving the push plate (14) left and right, a through groove (22) is formed in the outer side wall of the bottom plate (3), and a receiving hopper (17) is arranged in the through groove (22) and is located below the discharging port (18).

2. The calcium carbide furnace off-gas recycling system according to claim 1, characterized in that: The hot recovery circulating water supply mechanism comprises a second water pump (5) mounted on the top of the hot recovery tank (8), the input end of the second water pump (5) is in communication with an external tap water pipe, and the output end of the second water pump (5) extends into the hot recovery tank (8), a first water pump (7) is mounted on the top of the bottom plate (3), the input end of the first water pump (7) extends into the hot recovery tank (8) and is in conduction with the output end of the second water pump (5), and the output end of the first water pump (7) is in communication with an external domestic water pipe.

3. The calcium carbide furnace off-gas recycling system of claim 1, wherein: The cleaning part comprises a cleaning motor (13) fixedly installed in the inner cavity of the hot recovery tank (8), and a transmission rod (1) is connected to the output end of the cleaning motor (13), and a plurality of scrapers (19) are arranged at equal intervals on the outer surface of the transmission rod (1).

4. The calcium carbide furnace off-gas recycling system of claim 1, wherein: The dust collecting part comprises a collecting pipe (16) in communication with the bottom of the hot recovery pipe (9), a collecting fan (20) is fixedly installed in the inner cavity of the collecting pipe (16), the lower end of the collecting pipe (16) is located in the through hole (15), and a discharging valve (21) is arranged above the collecting fan (20) on the collecting pipe (16).

5. The calcium carbide furnace off-gas recycling system of claim 4, wherein: The upper and lower ends of the receiving hopper (17) are respectively attached to the bottom of the lower transverse plate (12) and the inner bottom wall of the bottom plate (3), and the left and right inner side walls of the receiving hopper (17) are flush with the left and right ends of the discharging port (18).

6. The calcium carbide furnace off-gas recycling system of claim 4, wherein: A handle (10) is fixedly connected to the outer side wall of the receiving hopper (17).

7. The calcium carbide furnace off-gas recycling system of claim 4, wherein: The output end of the calcium carbide production main body (2) is communicated with the input end of the hot recovery pipe (9) through a contraction pipe (4).

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