Coal-fired flue gas waste heat recycling equipment

Abstract

The invention relates to the technical field of boiler combustion, and discloses coal-fired flue gas waste heat recycling equipment which comprises a moving pipeline, a heat absorption pipeline for water to pass through is arranged in the moving pipeline, a moving assembly is arranged on the moving pipeline, a sweeping ring is arranged on the moving assembly, and the sweeping ring is arranged on the heat absorption pipeline in a sleeving mode. The cleaning ring is driven by the moving assembly to move, so that the cleaning ring can clean the heat absorption pipeline, and a worker only needs to drive the moving assembly to clean dust on the heat absorption pipeline, so that the dust outside the heat absorption pipeline can be cleaned; water in the heat absorption pipeline can fully absorb waste heat of the smoke, and the utilization efficiency of the waste heat of the smoke is improved.

Description

Technical Field

[0001] The present application relates to the technical field of boiler combustion, and in particular to a device for recycling waste heat of coal-fired flue gas. Background Art

[0002] A boiler is a device that uses the heat energy from fuel combustion or other heat energy to heat feed water or other working fluids to produce steam, hot water or organic heat carriers. The boiler will produce some flue gas when burning, and the flue gas is usually discharged to the outside through the chimney. There will be residual heat in the flue gas. The equipment uses the waste heat in the flue gas to further improve energy utilization efficiency while reducing overall operating costs.

[0003] The equipment in the related art includes a mobile pipeline, in which a plurality of heat absorbing pipelines are arranged, and water flows through the heat absorbing pipelines, and the water absorbs the residual heat in the flue gas.

[0004] Since the flue gas in the mobile pipe will cover the heat absorbing pipe, dust will accumulate outside the heat absorbing pipe, making it difficult for the heat absorbing pipe to directly contact the flue gas, resulting in lower heat transfer by the flue gas and lower utilization efficiency of the flue gas waste heat. Summary of the invention

[0005] In order to improve the problem that it is difficult to clean dust from heat absorbing pipes, the present application provides a coal-fired flue gas waste heat recycling device.

[0006] The present application provides a coal-fired flue gas waste heat recycling device, which adopts the following technical solution: A coal-fired flue gas waste heat recycling device comprises a movable pipeline, a heat absorbing pipeline for water to pass through is arranged in the movable pipeline, a movable component is arranged on the movable pipeline, a cleaning ring is arranged on the movable component, the cleaning ring is sleeved on the heat absorbing pipeline, and the movable component is used to drive the cleaning ring to move along the heat absorbing pipeline.

[0007] By adopting the above technical solution, the cleaning ring is driven to move by the moving component, so that the cleaning ring can clean the heat absorbing pipe. The staff only needs to drive the moving component to complete the cleaning of the dust in the heat absorbing pipe, so that the dust outside the heat absorbing pipe can be cleaned, and the water in the heat absorbing pipe can fully absorb the waste heat of the flue gas, thereby increasing the utilization efficiency of the waste heat of the flue gas.

[0008] Optionally, a collecting bag is provided on the movable pipe, and a movable block is slidably connected to the movable pipe, and the movable block is arranged on one end of the collecting bag; when the movable block abuts against one side of the movable pipe, the collecting bag is opened; when the movable block abuts against the other opposite side of the movable pipe, the collecting bag is closed.

[0009] By adopting the above technical solution, the moving block is moved from one side of the moving pipe to the other side opposite to the moving pipe by sliding, the collecting bag is opened, and then the cleaning ring cleans the heat absorbing pipe. The dust on the heat absorbing pipe can fall smoothly into the collecting bag, so that the collecting bag can prevent dust from accumulating in the moving pipe.

[0010] Optionally, a moving bar is rotatably connected to the moving block, and a moving hole for the moving bar to pass through is opened on the moving pipe; when the moving bar extends into the moving pipe, the collecting bag opens; when the moving bar is detached from the moving pipe, the collecting bag is closed.

[0011] By adopting the above technical solution, the staff rotates the moving bar so that the moving bar can pass through the moving hole, and the moving bar extends into the moving pipe, so that the moving block can abut one side of the moving pipe, so that the collecting bag is opened; then the staff pulls the moving bar to separate the moving bar from the moving hole to the moving pipe, and rotates the moving bar so that the moving bar is not easy to pass through the moving hole, and the moving block can abut the other side of the moving pipe, so that the collecting bag is closed; by limiting the moving block by the moving bar, the possibility of the moving block moving in the moving pipe is reduced, so that the collection bag will not occupy the moving pipe, so that the smoke can pass through the moving pipe.

[0012] Optionally, a receiving groove for placing the cleaning ring is provided on the movable pipe, and a limiting plate for sealing the receiving groove is slidably connected to the movable pipe.

[0013] By adopting the above technical solution, the cleaning ring is placed in the containing groove, and the containing groove is sealed with a limit plate, so that the smoke in the mobile pipe will not contaminate the cleaning ring, so that the cleaning ring can stably clean the heat absorbing pipe, making the heat absorbing pipe cleaner after being cleaned by the cleaning ring.

[0014] Optionally, a moving tooth block is provided on the moving bar, a moving gear for engaging the moving tooth block is rotatably connected in the moving pipe, a moving rack is meshed on the moving gear, and the moving rack is arranged on a limiting plate; when the moving bar is located in the moving pipe, the limiting plate does not block the receiving groove; when the moving bar is separated from the moving pipe, the limiting plate blocks the receiving groove.

[0015] By adopting the above technical solution, the staff slides the moving bar to drive the moving block to move and open the collecting bag. Since the moving tooth block is engaged with the moving gear, the moving bar can drive the moving gear to rotate, and the moving gear is engaged with the moving rack, so that the moving gear can drive the moving rack to move, and the moving rack drives the limiting plate to move, so that the limiting plate can be separated from the receiving groove, so that the cleaning ring can clean the heat absorbing pipe, and the dust cleaned by the cleaning ring on the heat absorbing pipe can fall into the collecting bag, thereby avoiding the situation where the collecting bag is not opened but the cleaning ring has already cleaned the heat absorbing pipe, so that the collecting bag can collect dust more stably.

[0016] Optionally, a fixing hole for the collection bag to pass through is provided on the moving pipe, a fixing plate for blocking the fixing hole is provided on the moving pipe, and the collection bag and the moving block are detachably connected.

[0017] By adopting the above technical solution, the collecting bag is passed through the fixing hole, and the collecting bag and the movable block are detachably connected, so that the collecting bag can be taken out from the fixing hole, the collecting bag can be cleaned stably, and the dust accumulated in the collecting bag can be cleaned.

[0018] Optionally, a stop spring is provided on the movable pipe, a stop block is provided on the stop spring, a stop groove for inserting the stop block is opened on the fixed plate, and the stop spring drives the stop block to be inserted into the stop groove; when the stop block is inserted into the stop groove, the fixed plate blocks the fixed hole.

[0019] By adopting the above technical solution, the stop block is driven to move by the stop spring, and the stop block is inserted into the stop groove. The groove wall of the stop groove limits the stop block, so that the stop block can limit the movement of the fixed plate, and the fixed plate can stably block the fixed hole, thereby reducing the possibility of the fixed plate detaching from the fixed hole and causing smoke to drift from the fixed hole, making the external environment cleaner and reducing the possibility of smoke drifting.

[0020] Optionally, an operating block is provided on the movable bar, an operating hole for inserting the operating block is provided on the stop block, an operating inclined surface is provided on the hole wall of the operating hole, the operating inclined surface is located in the insertion path of the operating block, and the distance between the operating inclined surface and the stop spring gradually increases along the insertion direction of the operating block; when the operating block is located in the operating hole, the stop block disengages from the stop groove.

[0021] By adopting the above technical solution, the staff rotates the moving bar to insert the operating block into the operating hole. Since the operating slope is located on the insertion path of the operating block and the distance between the operating slope and the stop spring gradually increases along the insertion direction of the operating block, the operating block can drive the stop block to move, allowing the stop block to disengage from the stop groove, so that the stop block releases the limit on the fixed plate, allowing the collecting bag to disengage from the fixed hole.

[0022] Optionally, a placement slot is provided on the moving block, a placement block for inserting into the placement slot is provided on the collecting bag, and a placement plate for blocking the opening of the placement slot is slidably connected to the moving block; when the placement plate blocks the placement slot, the placement block is fixed in the placement slot.

[0023] By adopting the above technical solution, the placement block is located in the placement groove, and the placement plate blocks the opening of the placement groove, so that the placement block is located in the placement groove, so that the moving block and the collecting bag can be fixed to each other, and the collecting bag can be removed from the moving block to facilitate subsequent cleaning of the collecting bag by the staff.

[0024] Optionally, a third magnet is provided on the fixing plate, a first magnet is provided on the placement plate, and the third magnet attracts the first magnet; when the fixing plate is separated from the fixing hole, the placement plate does not block the placement groove.

[0025] By adopting the above technical solution, the first magnet attracts the third magnet, so that the fixed plate can drive the placement plate to move. When the fixed plate does not block the fixed hole, the fixed plate can drive the placement plate to move. The placement plate does not block the placement slot, so the staff does not need to drive the placement plate to move again, which reduces the staff's operating steps and speeds up the staff's operation of cleaning the collection bag.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The cleaning ring is driven to move by the moving component so that the cleaning ring can clean the heat absorbing pipe. The staff only needs to drive the moving component to clean the dust on the heat absorbing pipe, so that the dust outside the heat absorbing pipe can be cleaned, and the water in the heat absorbing pipe can fully absorb the waste heat of the flue gas, thereby increasing the utilization efficiency of the waste heat of the flue gas.

[0027] 2. The staff rotates the moving bar so that it can pass through the moving hole and extend into the moving pipe, so that the moving block can abut one side of the moving pipe, so that the collecting bag is opened; then the staff pulls the moving bar to separate the moving bar from the moving hole to the moving pipe, rotates the moving bar so that it is not easy for the moving bar to pass through the moving hole, and the moving block can abut the other side of the moving pipe, so that the collecting bag is closed; the moving bar limits the moving block, reducing the possibility of the moving block moving in the moving pipe, so that the collecting bag will not occupy the moving pipe, so that the smoke can pass through the moving pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 is along Figure 1 Sectional view along line AA; Figure 3 is a structural schematic diagram highlighting the moving bar in an embodiment of the present application; Figure 4 is along Figure 3 Sectional view along the midline BB; Figure 5 is along Figure 1 Partial cross-sectional view along the CC line.

[0029] Reference numerals: 1, moving pipe; 11, moving assembly; 111, moving motor; 112, screw rod; 113, connecting plate; 12, cleaning ring; 13, receiving groove; 131, limiting plate; 14, moving hole; 15, fixing hole; 151, groove; 152, stop spring; 153, stop block; 154, operating hole; 155, operating inclined surface; 16, concave hole; 2, heat absorbing pipe; 3, moving bar; 31, moving block; 311, Placement slot; 312, placement plate; 313, movable hole; 314, magnetic hole; 315, first magnet; 316, second magnet; 32, collection bag; 321, placement block; 322, dovetail block; 323, dovetail slot; 33, operation block; 34, moving gear block; 341, moving gear; 342, moving rack; 4, fixing plate; 41, accommodating slot; 411, third magnet; 42, clamping strip; 421, clamping slot; 43, stop slot. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-5 This application is described in further detail.

[0031] This embodiment discloses a coal-fired flue gas waste heat recycling device. Figure 1 A waste heat recycling device for coal-fired flue gas comprises a mobile pipeline 1, through which flue gas passes. A plurality of heat absorbing pipelines 2 are arranged in the mobile pipeline 1, and the plurality of heat absorbing pipelines 2 are arranged in an array along the length direction of the mobile pipeline 1. The heat absorbing pipeline 2 is for water flow to pass through, and the water flow can absorb waste heat in the flue gas through the heat absorbing pipeline 2.

[0032] Reference Figure 2The mobile pipe 1 is provided with a mobile assembly 11, which includes a mobile motor 111 and a screw rod 112. The screw rod 112 is rotatably connected to the mobile pipe 1, and the mobile motor 111 is fixedly connected to the mobile pipe 1. The driving shaft of the mobile motor 111 is fixedly connected to the screw rod 112. When the mobile motor 111 is started, the screw rod 112 rotates.

[0033] Reference Figure 2 The screw rod 112 is rotatably connected to a connecting plate 113, and a plurality of cleaning rings 12 are fixedly connected to the connecting plate 113. Each cleaning ring 12 is respectively sleeved on a different heat absorbing pipe 2. When the moving motor 111 is started, the screw rod 112 drives the cleaning ring 12 to move along the heat absorbing pipe 2 through the connecting plate 113, so that the cleaning ring 12 cleans the outer surface of the heat absorbing pipe 2.

[0034] Reference Figure 2 The inner wall of the mobile pipe 1 is provided with a receiving groove 13, and the cleaning ring 12 and the connecting plate 113 can both be located in the receiving groove 13. A limiting plate 131 is slidably connected to the inner wall of the mobile pipe 1, and the limiting plate 131 can block the receiving groove 13. When the cleaning ring 12 is located in the receiving groove 13, the limiting plate 131 can block the receiving groove 13.

[0035] Reference Figure 1 and Figure 2 Two moving holes 14 are provided on the surface of the moving pipe 1, and two moving bars 3 are provided on the moving pipe 1, and the moving bars 3 can pass through the moving holes 14. A moving block 31 is rotatably connected on the surface of the moving bar 3, and the moving block 31 is slidably connected to the inner wall of the moving pipe 1.

[0036] Reference Figure 2 and Figure 3 A collecting bag 32 is provided on the moving pipe 1 , and the collecting bag 32 is used to collect the dust swept by the cleaning ring 12 .

[0037] Reference Figure 2 and Figure 4 , two placement blocks 321 are fixedly connected on one side of the collection bag 32, and the other side of the collection bag 32 is detachably connected to the moving pipe 1. A placement groove 311 is provided on the surface of the moving block 31 for inserting the placement block 321, a dovetail block 322 is integrally formed on the placement block 321, and a dovetail groove 323 is provided on the groove wall of the placement groove 311 for inserting the dovetail block 322. When the dovetail block 322 is inserted into the dovetail groove 323, the placement block 321 is fixed in the placement groove 311.

[0038] Reference Figure 4A placement plate 312 is slidably connected to the surface of the placement block 321, and the placement plate 312 is used to block the opening of the placement groove 311. A movable hole 313 is opened on the surface of the placement plate 312, and one end of the collection bag 32 passes through the movable hole 313.

[0039] Reference Figure 4 A magnetic hole 314 is provided on the surface of the placement plate 312, a first magnet 315 is fixedly connected in the magnetic hole 314, and a second magnet 316 is fixedly connected on the surface of the moving block 31. The first magnet 315 attracts the second magnet 316. When the second magnet 316 attracts the first magnet 315, the placement plate 312 moves, and the placement plate 312 can block the opening of the placement slot 311, and at this time, one end of the collection bag 32 is located in the movable hole 313.

[0040] Reference Figure 1 , Figure 2 and Figure 3 When the moving bar 3 extends into the moving pipe 1, the moving block 31 abuts against the inner wall of the moving pipe 1 away from the moving hole 14, and the collecting bag 32 is opened; when the moving bar 3 is separated from the moving pipe 1, the moving block 31 abuts against the inner wall of the moving hole 14 opened in the moving pipe 1, and the collecting bag 32 is closed.

[0041] Reference Figure 1 and Figure 2 A fixing hole 15 is provided on the side of the moving pipe 1 for the collection bag 32 to pass through, and the fixing hole 15 is located between the two moving holes 14. One end of the collection bag 32 is connected to the moving block 31, and the other end of the collection bag 32 is bonded to the fixing hole 15. A fixing plate 4 for inserting into the fixing hole 15 is provided on the surface of the moving pipe 1, and the fixing plate 4 is used to completely block the opening of the fixing hole 15.

[0042] Reference Figure 2 and Figure 4 Two receiving grooves 41 are provided on the surface of the fixing plate 4 facing the fixing hole 15, and a third magnet 411 is fixedly connected in the receiving groove 41. The third magnet 411 can absorb the first magnet 315, and the magnetic force of the third magnet 411 is greater than that of the second magnet 316. When the fixing plate 4 is separated from the fixing hole 15, the third magnet 411 absorbs the first magnet 315, allowing the placement plate 312 to move, so that the placement plate 312 does not block the placement groove 311.

[0043] Reference Figure 1 A clamping strip 42 is rotatably connected on the surface of the fixed plate 4, and a clamping groove 421 for inserting the clamping strip 42 is provided on the outer surface of the mobile pipe 1. When the clamping strip 42 is inserted into the clamping groove 421, the fixed plate 4 completely blocks the fixing hole 15.

[0044] Reference Figure 5A groove 151 is provided on the hole wall of the fixing hole 15, and a stop spring 152 is fixedly connected to the bottom wall of the groove 151. A stop block 153 is fixedly connected to the end surface of the stop spring 152 away from the bottom wall of the groove 151, and the stop spring 152 drives the stop block 153 to protrude from the groove 151. A stop groove 43 for the stop block 153 to be inserted is provided on the surface of the fixing plate 4. When the stop block 153 is inserted into the stop groove 43, the stop spring 152 is in a non-stressed state; when the stop block 153 is located in the groove 151, the stop spring 152 is in a compressed state.

[0045] Reference Figure 3 and Figure 5 A concave hole 16 connected to the groove 151 is provided on the outer surface of the moving pipe 1, and an operating block 33 is fixedly connected to the surface of the moving bar 3, and the operating block 33 can be inserted into the concave hole 16. An operating hole 154 for inserting the operating block 33 is provided on the surface of the stop block 153, and an operating inclined surface 155 is provided on the hole wall of the operating hole 154 close to the stop spring 152. The distance between the operating inclined surface 155 and the stop spring 152 gradually increases from the concave hole 16 to the groove 151, and the operating inclined surface 155 is located on the insertion path of the operating block 33.

[0046] Reference Figure 3 and Figure 5 When the moving bar 3 is separated from the moving pipe 1, the moving bar 3 rotates on the moving block 31. At this time, the operating block 33 can pass through the recessed hole 16 and be inserted into the operating hole 154, so that the operating block 33 drives the stop block 153 to move through the operating inclined surface 155, so that the stop block 153 is separated from the stop groove 43, and the stop block 153 is released from the limit of the fixed plate 4.

[0047] Reference Figure 2 and Figure 3 A moving tooth block 34 is integrally formed on the surface of the moving bar 3, and the moving tooth block 34 extends along the length direction of the moving bar 3, and the moving tooth block 34 extends to the surface of the moving block 31. Two moving gears 341 are rotatably connected in the moving pipe 1, and each moving gear 341 is respectively engaged with a different moving tooth block 34. The moving gear 341 extends in a direction perpendicular to the length direction of the moving bar 3, and a moving rack 342 is engaged with the moving gear 341. The moving rack 342 extends along the height direction of the moving pipe 1, and the end of the moving rack 342 away from the ground is fixedly connected to the limit plate 131.

[0048] Reference Figure 2 and Figure 3When the moving bar 3 is separated from the moving pipe 1, the moving bar 3 drives the moving gear 341 to rotate through the moving gear block 34, so that the moving gear 341 drives the moving rack 342 to move. At this time, the moving rack 342 drives the limiting plate 131 to move, so that the limiting plate 131 blocks the receiving groove 13. At this time, the limiting plate 131 restricts the cleaning ring 12 from separating from the receiving groove 13.

[0049] Reference Figure 2 and Figure 3 When the moving bar 3 is inserted into the moving pipe 1, the collecting bag 32 is opened, and the moving bar 3 drives the moving gear 341 to rotate through the moving gear block 34, so that the moving gear 341 drives the moving rack 342 to move. At this time, the moving rack 342 drives the limiting plate 131 to move, so that the limiting plate 131 does not block the receiving groove 13. At this time, the cleaning ring 12 can clean the heat absorption pipe 2.

[0050] The implementation principle of a coal-fired flue gas waste heat recycling device in an embodiment of the present application is: the staff first pushes the moving bar 3 to allow the moving bar 3 to be located in the moving pipe 1, and the moving bar 3 drives the collecting bag 32 to open through the moving block 31. At this time, the moving bar 3 drives the limiting plate 131 to move through the moving gear 341 and the moving bar 3, so that the cleaning ring 12 can clean the heat absorption pipe 2, so that the dust can fall into the collecting bag 32.

[0051] The staff pulls the moving bar 3 to disengage the moving bar 3 from the moving pipe 1. The moving bar 3 rotates on the moving block 31 to insert the operating block 33 into the operating hole 154. The operating block 33 drives the stop block 153 to disengage from the stop groove 43 through the operating inclined surface 155. The staff then rotates the clamping bar 42 to allow the fixing plate 4 to move on the moving pipe 1, and the staff can clean the collecting bag 32.

[0052] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0053] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. A coal-fired flue gas waste heat recycling device, comprising a mobile pipeline (1), wherein a heat absorbing pipeline (2) for water to pass through is arranged in the mobile pipeline (1), characterized in that: The movable pipe (1) is provided with a movable component (11), the movable component (11) is provided with a cleaning ring (12), the cleaning ring (12) is sleeved on the heat absorbing pipe (2), and the movable component (11) is used to drive the cleaning ring (12) to move along the heat absorbing pipe (2).

2. The coal-fired flue gas waste heat recycling device according to claim 1, characterized in that: The movable pipe (1) is provided with a collecting bag (32), and a movable block (31) is slidably connected to the movable pipe (1), and the movable block (31) is arranged on one end of the collecting bag (32); when the movable block (31) abuts against one side of the movable pipe (1), the collecting bag (32) is opened; when the movable block (31) abuts against the other side opposite to the movable pipe (1), the collecting bag (32) is closed.

3. The coal-fired flue gas waste heat recycling device according to claim 2, characterized in that: The moving block (31) is rotatably connected to a moving bar (3), and the moving pipe (1) is provided with a moving hole (14) for the moving bar (3) to pass through; when the moving bar (3) extends into the moving pipe (1), the collecting bag (32) opens; when the moving bar (3) is separated from the moving pipe (1), the collecting bag (32) closes.

4. The coal-fired flue gas waste heat recycling device according to claim 3, characterized in that: The movable pipe (1) is provided with a receiving groove (13) for placing the cleaning ring (12), and a limiting plate (131) for sealing the receiving groove (13) is slidably connected to the movable pipe (1).

5. The coal-fired flue gas waste heat recycling device according to claim 4, characterized in that: The moving bar (3) is provided with a moving tooth block (34); a moving gear (341) for meshing with the moving gear block (34) is rotatably connected in the moving pipe (1); a moving rack (342) is meshedly connected to the moving gear (341); the moving rack (342) is arranged on a limiting plate (131); when the moving bar (3) is located in the moving pipe (1), the limiting plate (131) does not block the receiving groove (13); when the moving bar (3) is separated from the moving pipe (1), the limiting plate (131) blocks the receiving groove (13).

6. The coal-fired flue gas waste heat recycling equipment according to claim 3, characterized in that: The movable pipe (1) is provided with a fixing hole (15) for the collection bag (32) to pass through, and the movable pipe (1) is provided with a fixing plate (4) for blocking the fixing hole (15). The collection bag (32) and the movable block (31) are detachably connected.

7. The coal-fired flue gas waste heat recycling device according to claim 6, characterized in that: The movable pipe (1) is provided with a stop spring (152), the stop spring (152) is provided with a stop block (153), the fixed plate (4) is provided with a stop groove (43) for the stop block (153) to be inserted, the stop spring (152) drives the stop block (153) to be inserted into the stop groove (43); when the stop block (153) is inserted into the stop groove (43), the fixed plate (4) blocks the fixed hole (15).

8. The coal-fired flue gas waste heat recycling device according to claim 7, characterized in that: An operating block (33) is provided on the moving bar (3); an operating hole (154) for inserting the operating block (33) is provided on the stop block (153); an operating inclined surface (155) is provided on the hole wall of the operating hole (154); the operating inclined surface (155) is located in the insertion path of the operating block (33); and the distance between the operating inclined surface (155) and the stop spring (152) gradually increases along the insertion direction of the operating block (33); when the operating block (33) is located in the operating hole (154), the stop block (153) is separated from the stop groove (43).

9. The coal-fired flue gas waste heat recycling device according to claim 6, characterized in that: The moving block (31) is provided with a placement groove (311), the collecting bag (32) is provided with a placement block (321) for inserting into the placement groove (311), and the moving block (31) is slidably connected with a placement plate (312) for blocking the opening of the placement groove (311); when the placement plate (312) blocks the placement groove (311), the placement block (321) is fixed in the placement groove (311).

10. The coal-fired flue gas waste heat recycling device according to claim 9, characterized in that: The fixing plate (4) is provided with a third magnet (411), the placement plate (312) is provided with a first magnet (315), and the third magnet (411) attracts the first magnet (315); when the fixing plate (4) is separated from the fixing hole (15), the placement plate (312) does not block the placement groove (311).

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