Energy-saving and emission-reducing device of gas-fired boiler

Abstract

The utility model relates to the technical field of energy conservation and emission reduction of boilers, and discloses an energy conservation and emission reduction device of a gas-fired boiler, which comprises a protective shell, a boiler is mounted in the protective shell, a filter box and an exhaust pipe are mounted on the protective shell, and the exhaust pipe is communicated with the filter box and the boiler; a mounting opening is formed in the filter box, a box cover is arranged at the mounting opening, and the box cover is in sliding fit with the filter box; an exhaust assisting assembly is arranged in the exhaust pipe and used for increasing the gas flowing speed. A limiting piece is arranged on the box cover and is in contact limiting fit with the box body of the filter box; a supporting plate is mounted in the filter box and is in limiting sliding fit with a box body of the filter box; a filter plate is clamped on the filter box; the box cover and the supporting plate are in linkage fit through a transmission assembly. The transmission assembly is arranged, in the process of opening the box cover, the transmission assembly drives the supporting plate to drive the filter plate to move out of the filter box, the structure is simple, the operation time is short, the time for personnel to stay in a dangerous environment is shortened, and the accident occurrence probability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conservation and emission reduction of boilers, and particularly relates to an energy conservation and emission reduction device for a gas boiler. Background Art

[0002] A gas boiler is a heating device that uses gas as fuel to generate heat. It burns natural gas, liquefied petroleum gas or other gases to convert chemical energy into heat energy, and then heats water or other media for use in the heating system. During operation, a certain amount of waste gas will be generated by the gas boiler, which mainly includes carbon monoxide, nitrogen oxides, sulfur dioxide and possible dust particles, etc. In order to meet the environmental protection requirements and reduce the pollution to the atmosphere, it is necessary to treat these waste gases.

[0003] A gas boiler device with high efficiency in energy conservation and emission reduction, disclosed in the publication number: CN215809284U, includes a sealed box body. A support column is fixedly connected to the bottom of the sealed box body. A control panel is fixedly connected to the outer surface of the sealed box body. A control button is movably connected inside the control panel. A first valve is fixedly connected to one side of the outer surface of the sealed box body close to the control panel. A water inlet is fixedly connected to the outer surface of the first valve. A diversion pipe is fixedly connected to the side of the outer surface of the first valve away from the water inlet. A second valve is fixedly connected to the end of the outer surface of the diversion pipe away from the first valve.

[0004] A gas boiler energy-saving device, disclosed in the publication number: CN219023665U, includes an energy-saving device body, a filter box connected to the top of the energy-saving device body, and three filter plates located inside the filter box. The filter box is provided with an open top. A step groove is formed on the outer side of the top of the filter box. A cover plate is sleeved on the outer side of the upper end of the filter box. The periphery of the cover plate is sleeved on the step groove. Two connecting plates are symmetrically placed on the filter box. Two groups of connecting rods are fixedly connected to the opposite surfaces of the two connecting plates. The three filter plates are connected between the two connecting plates. A fixing component is arranged on the outer side of the cover plate.

[0005] Based on the above technical features, the problems that occur are as follows: In the prior art, before cleaning the filter plate, it is necessary to first open the lid of the filter box and then remove the filter plate from the filter box. The whole disassembly and assembly process is relatively cumbersome and the operation time is too long. Since the inside of the gas furnace is in a high-temperature and high-pressure state, and there are also dangerous factors such as hot water pipes and toxic gases generated during the combustion process, the long disassembly and assembly time exposes the operator to a dangerous environment for a long time, which is likely to cause production accidents.

[0006] Therefore, it is very necessary to solve the above problems through an energy conservation and emission reduction device for a gas boiler. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide an energy-saving and emission-reduction device for a gas boiler to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above purpose, the present utility model provides the following technical solution: An energy-saving and emission-reduction device for a gas boiler, including a protective shell, a boiler is fixedly installed inside the protective shell, a filter box and an exhaust pipe are fixedly installed on the protective shell, and the exhaust pipe is connected to the filter box and the boiler; an air outlet and an installation opening are provided on the filter box; the air outlet and the exhaust pipe are opposite to the pipe orifice of the filter box, and an auxiliary exhaust component is arranged inside the exhaust pipe, and the auxiliary exhaust component is used to accelerate the gas flow rate; a box cover is arranged at the installation opening of the filter box, the box cover covers the installation opening and is in sealed sliding fit with the filter box; a limiting member is arranged on the box cover, and the limiting member is in contact-limiting fit with the box body of the filter box; a support plate is installed inside the filter box, and the support plate is in limiting sliding fit with the box body of the filter box; a filter plate is clamped on the filter box, and the pipe orifice of the exhaust pipe facing the filter box is located; the box cover and the support plate are linked and cooperated through a transmission component to drive the support plate to slide towards the installation opening.

[0009] Preferably, the transmission component includes a rack, a gear and a first lead screw; the rack is fixedly arranged on the box cover; the first lead screw penetrates into the filter box and is rotatably connected to the filter box; the gear is coaxially and fixedly connected to the first lead screw; the rack is in contact meshing fit with the gear; the first lead screw passes through the support plate and is threadedly connected to the support plate.

[0010] Preferably, the limiting member includes a moving block, a clamping block and a sliding rod; a chute and a first groove are provided on the box cover, the moving block is slidably arranged in the chute, and the clamping block is slidably arranged in the first groove; the sliding rod is located between the moving block and the clamping block and is fixedly connected to the moving block at one end and the clamping block at the other end; the sliding rod penetrates through the box cover and is in sliding fit with the box cover; a second groove is provided on the filter box, and the clamping block is in contact plugging and limiting fit with the second groove.

[0011] Preferably, a spring is arranged in the first groove, and the spring is sleeved on the sliding rod; one end of the spring is fixedly connected to the clamping block, and the other end is fixedly connected to the box cover.

[0012] Preferably, a plurality of filter plates are clamped on the support plate.

[0013] Preferably, a water tank is fixedly arranged inside the boiler, and the water tank is fixedly communicated with a water inlet pipe and a diversion pipe; the water inlet pipe passes through the boiler and the protective shell and is connected to a water pump; the diversion pipe passes through the boiler and the protective shell and is fixedly communicated with a water outlet pipe.

[0014] Preferably, the diversion pipe is spirally wound around the boiler.

[0015] Preferably, the exhaust assisting assembly includes an air pump which is fixedly arranged in the exhaust pipe.

[0016] Preferably, the exhaust assisting assembly includes a piston and a driving unit for driving the piston to slide; the exhaust pipe is a right-angle elbow pipe, including a first pipe communicated with the filter box and a second pipe communicated with the boiler, the first pipe and the second pipe are perpendicular to each other and fixedly communicated; a piston pipe is fixedly communicated with the exhaust pipe, the piston is slidably arranged in the piston pipe and is in contact and sealing sliding fit with the second pipe of the exhaust pipe; the piston is in contact and plugging fit with the first pipe of the exhaust pipe; the driving unit is in water flow transmission fit with the water in the water tank, and the piston is in transmission connection with the driving unit.

[0017] Preferably, the driving unit includes a fan blade and a second lead screw, and the second lead screw 23 is a reciprocating lead screw; the second lead screw is located in the second pipe of the exhaust pipe and one end thereof is in threaded connection with the piston, and the other end thereof penetrates into the water tank and is in sealing rotational connection with the water tank; the fan blade is located in the water tank and is coaxially and fixedly connected with the second lead screw; the fan blade is in water flow transmission fit with the water in the water tank; the second lead screw, the piston and the ball jointly form a ball screw pair.

[0018] The technical effects and advantages of the present utility model are as follows:

[0019] First, the present utility model is provided with a transmission assembly. During the process of opening the box cover, the support plate is driven to slide towards the installation opening through the transmission assembly, thereby driving the filter plate to move out of the filter box. The structure is simple, the operation time is short, the time for the operator to be in a dangerous environment is reduced, and the probability of accidents is lowered.

[0020] Second, the present utility model is provided with an exhaust assisting assembly in the exhaust pipe, so as to accelerate the rapid discharge of the waste gas generated by gas combustion from the exhaust pipe and improve the treatment efficiency. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of Embodiment 1 of the present utility model;

[0022] Figure 2 is a partial sectional schematic diagram of Embodiment 1 of the present utility model;

[0023] Figure 3 is a schematic diagram of the filter box of Embodiment 1 of the present utility model;

[0024] Figure 4 is an internal schematic diagram of the filter box of Embodiment 1 of the present utility model;

[0025] Figure 5 is an enlarged schematic diagram at A of Embodiment 1 of the present utility model;

[0026] Figure 6 is a half-sectional schematic diagram of Embodiment 2 of the present utility model.

[0027] In the figure: 1. protective shell; 2. water outlet pipe; 3. water inlet pipe; 4. filter box; 5. exhaust pipe; 6. air pump; 7. box cover; 8. rack; 9. gear; 10. water tank; 11. boiler; 12. diversion pipe; 13. moving block; 14. chute; 15. support plate; 16. first lead screw; 17. filter plate; 18. first groove; 19. clamping block; 20. slide bar; 21. spring; 22. piston; 23. second lead screw; 24. fan blade; 25. second groove. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1: The present invention provides an energy-saving and emission-reduction device for a gas boiler, including a protective shell 1. As Figure 1 shown, the protective shell 1 is a cylindrical shape with both ends closed. The bottom of the protective shell 1 is welded with support legs. The top of the protective shell 1 is fixedly assembled with a filter box 4. An installation opening is cut at the top of the filter box 4, and a box cover 7 is assembled in the installation opening. The box cover 7 covers the installation opening. A reversed T-shaped limiting groove is cut horizontally along the top box body of the filter box 4, and the limiting groove communicates with the installation opening. The box cover 7 matches the limiting groove and is slidably assembled in the limiting groove. The box cover 7 is in limiting sliding fit with the filter box 4 through the limiting groove to control the opening and closing of the installation opening.

[0030] As Figure 2 shown, a boiler 11 is fixedly assembled in the protective shell 1. The boiler 11 is communicated with the filter box 4 through an exhaust pipe 5. The exhaust pipe 5 is a right-angle elbow pipe. The intake end of the exhaust pipe 5 is fixedly connected to the top of the boiler 11, and the outlet end of the exhaust pipe 5 is fixedly connected to the filter box 4. The exhaust pipe 5 is used to discharge the waste gas generated by the combustion of gas in the boiler 11. An air outlet is cut on the filter box 4, and the air outlet corresponds to the outlet end of the exhaust pipe 5.

[0031] An auxiliary exhaust component is fixedly assembled in the exhaust pipe 5. The auxiliary exhaust component is used to accelerate the flow rate of the gas in the exhaust pipe 5. The auxiliary exhaust component includes an air pump 6, and the air pump 6 is fixedly assembled in the exhaust pipe 5.

[0032] As Figure 4As shown, a support plate 15 is limitedly slidably engaged in the filter box 4, and the support plate 15 can slide up and down in the filter box 4. A plurality of vertical filter plates 17 are clamped on the support plate 15 through a clamping groove, and the plurality of filter plates 17 are parallel to each other and arranged in a straight line. The plurality of filter plates 17 are located between the gas outlet and the gas outlet end of the exhaust pipe 5 and are perpendicular to the flow direction of the gas, and are used to filter particulate matter in the exhaust gas.

[0033] The box cover 7 and the support plate 15 are linked by the transmission assembly to ensure that the support plate 15 can slide up in the filter box 4 when the box cover 7 opens the installation port; and the support plate 15 can slide down in the filter box 4 when the box cover 7 closes the installation port. The transmission assembly includes a rack 8, a gear 9 and a first screw rod 16. The rack 8 is welded and fixed to the top of the box cover 7 and arranged along the sliding direction of the box cover 7. A clearance groove is chiseled in the vertical direction on the box body of the filter box 4, which is close to the air outlet on the filter box 4 and communicated with the inside of the filter box 4. A slider is welded on the support plate 15, and the slider is inserted into the clearance groove and limitedly slidably cooperates with the clearance groove. The first screw rod 16 is vertically placed in the clearance groove, the bottom of the first screw rod 16 is rotatably connected to the box body of the filter box 4, and the top of the first screw rod 16 passes through the filter box 4 and is rotatably connected to the box body of the filter box 4. The first screw rod 16 passes through the support plate 15 and is threadedly connected to the support plate 15. The gear 9 is coaxially fixedly connected to the top of the first screw rod 16. The rack 8 and the gear 9 are in contact meshing cooperation.

[0034] like Figure 3 and Figure 5 As shown, a slide groove 14 and a first groove 18 are cut out of the top of the box cover 7. A moving block 13 is slidably matched in the slide groove 14, and the top of the moving block 13 protrudes from the slide groove 14. A block 19 is slidably matched in the first groove 18. The first groove 18 is a notch groove, and the notch is perpendicular to the box body of the filter box 4 along the horizontal direction, and the block 19 can slide out from the notch. The sliding direction of the block 19 is perpendicular to the sliding direction of the box cover 7. The sliding direction of the moving block 13 is the same as the sliding direction of the block 19. The moving block 13 and the block 19 are connected by a sliding rod 20. The sliding rod 20 passes through the cover body of the box cover 7 along the sliding direction of the moving block 13 and the block 19 and slides with the cover body. The sliding rod 20 is fixedly connected to the moving block 13 and the block 19 for synchronous sliding of the moving block 13 and the block 19. A second groove 25 is cut out of the box body of the filter box 4, and the second groove 25 is also a notch groove. The notch of the second groove 25 is connected to the notch of the first groove 18 in a butt-jointed manner. The clamping block 19 is engaged with the second groove 25 in a contact-jointed position-limiting manner, and is used for limiting the position of the box cover 7.

[0035] A spring 21 is placed in the first groove 18. The spring 21 is sleeved on the sliding rod 20 and is fixedly connected to the lid body of the box lid 7 at one end and fixedly connected to the clamping block 19 at the other end, and is used for the clamping block 19 to automatically insert into the second groove 25. The end face of the clamping block 19 away from the spring 21 is an inclined surface, and this inclined surface is in contact and sliding abutment fit with the box body of the filter box 4. When this inclined surface contacts the box body of the filter box 4, it is used to push the clamping block 19 back into the first groove 18.

[0036] As Figure 2 shown, a water tank 10 is fixedly assembled in the boiler 11, and the water tank 10 is fixedly communicated with the water inlet pipe 3 and the diversion pipe 12. The water inlet pipe 3 passes through the boiler 11 and the protective shell 1 in sequence and is connected to a water pump for filling water into the water tank 10. The water inlet pipe 3 is hermetically and fixedly connected to the shell of the boiler 11 and the shell of the protective shell 1. The diversion pipe 12 passes through the boiler 11 and the protective shell 1 in sequence and is fixedly communicated with the water outlet pipe 2 for discharging hot water. The diversion pipe 12 is hermetically and fixedly connected to the shell of the boiler 11 and the shell of the protective shell 1. The pipe body of the diversion pipe 12 that is both outside the boiler 11 and inside the protective shell 1 spirally surrounds the boiler 11 with the central axis of the boiler 11 as the spiral center line, ensuring that the hot water flowing out of the boiler 11 can be continuously heated by the boiler 11 and maintain the temperature.

[0037] Working principle of Embodiment 1: During use, water is filled into the water tank 10 through the water pump and the water inlet pipe 3. At this time, the gas sprayed into the boiler 11 burns to heat the water in the water tank 10, and the heated hot water flows out of the water tank 10 through the diversion pipe 12 and the water outlet pipe 2. The hot water flowing through the diversion pipe 12 is continuously heated by the boiler 11 to maintain the temperature of the hot water.

[0038] During the combustion of the gas in the boiler 11, waste gas is generated, and the waste gas flows into the filter box 4 through the exhaust pipe 5. At the same time, the air pump 6 is turned on, and the air pump 6 extracts the waste gas in the boiler 11. After the waste gas enters the filter box 4, it blows towards the filter plate 17. After being filtered layer by layer by multiple filter plates 17, the pollution particles in the waste gas are adsorbed on the filter plate 17 to achieve emission reduction. The filtered waste gas is discharged through the air outlet of the filter box 4.

[0039] When it is necessary to clean the filter plate 17 after using for a period of time, the water pump, the air pump 6 and the boiler 11 stop working. At this time, the worker pushes the moving block 13, and the moving block 13 slides along the sliding groove 14 in a direction away from the second groove 25. The moving block 13 drives the sliding rod 20 to slide in a direction away from the second groove 25, the sliding rod 20 drives the clamping block 19 to slide in a direction away from the second groove 25, and the clamping block 19 slides out of the second groove 25 and slides into the first groove 18. At this time, the limit of the box lid 7 is released, and the spring 21 is compressed.

[0040] Then, the pushing force on the moving block 13 is maintained, and the moving block 13 is pulled at the same time, so that the moving block 13 drives the box cover 7 to slide along the limiting groove to open the installation opening. The box cover 7 drives the rack 8 to move closer to the gear 9 until it contacts the gear 9. At this time, all the filter plates 17 are exposed at the installation opening and do not cross the box cover 7.

[0041] As the box cover 7 continues to slide, the rack 8 drives the gear 9 to rotate, the gear 9 drives the first screw 16 to rotate, the first screw 16 drives the slider to slide upward along the clearance groove, the slider drives the support plate 15 to move upward in the filter box 4, and the support plate 15 drives all the filter plates 17 to pass through the installation opening. When the rack 8 and the gear 9 are about to lose contact, all the filter plates 17 are moved out of the filter box 4. At this time, the slider is in contact with the top box body of the filter box 4.

[0042] Then stop the effect of applying force to the moving block 13 and take out all the filter plates 17 from the drawer slot for cleaning. In the process, the spring 21 stretches and drives the drawer block 19 to slide out from the notch of the first groove 18.

[0043] After cleaning the filter plate 17, install the filter plate 17 into the card slot. Then push the moving block 13, and the moving block 13 drives the box cover 7 to slide and close the installation port. The box cover 7 drives the rack 8 to drive the gear 9 to rotate again, and this time the rotation direction of the gear 9 is reversed relative to the previous direction. The gear 9 drives the first screw rod 16 to reverse relative to the previous direction. The first screw rod 16 pushes the slider to slide down along the give way groove, and the slider drives the support plate 15 to slide downward in the filter box 4, and the support plate 15 drives all the filter plates 17 to move into the filter box 4. When the rack 8 and the gear 9 are completely disengaged, the support plate 15 abuts against the bottom box body of the filter box 4, and all the filter plates 17 are completely moved into the filter box 4. During this process, the box cover 7 and the filter plates 17 do not cross-contact.

[0044] As the box cover 7 continues to slide to close the installation opening, the block 19 contacts the body of the filter box 4. Subsequently, the body of the filter box 4 pushes the block 19 to slide into the first groove 18, and the spring 21 is compressed. When the box cover 7 completely closes the installation opening, the notch of the first groove 18 and the notch of the second groove 25 are butted and completely overlapped. At this time, under the action of the elastic force of the spring 21, the block 19 slides out of the first groove 18 again and is inserted into the second groove 25. At this point, the block 19 forms a snap connection with the body of the filter box 4 and the box cover 7 is re-fixed.

[0045] Embodiment 2: Figure 6An energy-saving and emission-reduction device for a gas boiler as shown. The difference between this embodiment and the first embodiment is that the exhaust assistance component includes a piston 22 and a driving unit for driving the piston 22 to move. The exhaust pipe 5 includes a first pipe and a second pipe, and the first pipe and the second pipe are perpendicular to each other and fixedly connected. The first pipe is horizontally arranged and fixedly connected to the filter box 4. The second pipe is vertically arranged and fixedly connected to the boiler 11. A piston pipe is coaxially and fixedly connected to the top of the second pipe, and the piston 22 is coaxially and sealingly slidably arranged in the piston pipe. The piston 22 is used to open and close the first pipe.

[0046] The driving unit is in transmission cooperation with the water flow in the water tank 10. The piston 22 is in transmission connection with the driving unit and is used to drive the piston 22 to slide along the second pipe and the piston pipe. The driving unit includes a second lead screw 23 and a fan blade 24. The second lead screw 23 is a vertical reciprocating lead screw. The second lead screw 23 is located in the second pipe of the exhaust pipe 5 and is coaxially threadedly connected to the piston 22. The second lead screw 23, the piston 22 and the ball jointly form a ball screw pair. Ensure that the second lead screw 23 can push the piston 22 to move.

[0047] The fan blade 24 is located in the water tank 10 and is close to the connection between the water tank 10 and the diversion pipe 12. The second lead screw 23 penetrates downward into the water tank 10 and is sealingly rotatably connected to the water tank 10. The fan blade 24 is coaxially fixed on the second lead screw 23 and is in transmission cooperation with the water flow in the water tank 10.

[0048] The working principle of the second embodiment: The difference in the working principle from that of the first embodiment lies in the different working process of the exhaust assistance component. Only this working process will be described below.

[0049] When the heated hot water in the water tank 10 flows out of the water tank 10, the hot water impacts the fan blade 24, and the fan blade 24 rotates and drives the second lead screw 23 to rotate. The second lead screw 23 pushes the piston 22 to perform reciprocating sealing sliding along the piston pipe and the second pipe of the exhaust pipe 5.

[0050] During the sliding process of the piston 22, the connection and sealing between the first pipe and the second pipe are controlled. When the piston 22 blocks the first pipe, the waste gas in the boiler 11 increases and the air pressure rises; when the piston 22 releases the block of the first pipe, the high-pressure gas blows towards the filter plate 17 through the first pipe, thereby increasing the speed of the waste gas blowing towards the filter plate 17 and improving the filtering efficiency.

[0051] Other processes are the same as those in the first embodiment and will not be described in detail in this working principle.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving and emission-reduction device for a gas boiler, comprising a protective shell (1), wherein a boiler (11) is fixedly installed inside the protective shell (1), and it is characterized in that: A filter box (4) and an exhaust pipe (5) are fixedly installed on the protective shell (1). The exhaust pipe (5) is connected to the filter box (4) and the boiler (11). An air outlet and an installation opening are provided on the filter box (4). The air outlet and the exhaust pipe (5) are opposite to each other at the pipe orifice of the filter box (4). An auxiliary exhaust component is arranged in the exhaust pipe (5) for accelerating the gas flow rate. A box cover (7) is arranged at the installation opening of the filter box (4). The box cover (7) covers the installation opening and is in sealing sliding fit with the filter box (4). A limiting member is arranged on the box cover (7), and the limiting member is in contact limiting fit with the box body of the filter box (4). A support plate (15) is installed in the filter box (4), and the support plate (15) is in limiting sliding fit with the box body of the filter box (4). A filter plate (17) is clamped on the filter box (4), and the pipe orifice of the exhaust pipe (5) located in the filter box (4) faces the filter plate (17). The box cover (7) and the support plate (15) are linked and cooperated through a transmission component for driving the support plate (15) to slide towards the installation opening.

2. The energy-saving and emission-reduction device for a gas boiler according to claim 1, wherein: The transmission component includes a rack (8), a gear (9) and a first lead screw (16). The rack (8) is fixedly arranged on the box cover (7). The first lead screw (16) penetrates into the filter box (4) and is rotatably connected to the filter box (4). The gear (9) is coaxially and fixedly connected to the first lead screw (16). The rack (8) is in contact meshing fit with the gear (9). The first lead screw (16) passes through the support plate (15) and is in threaded connection with the support plate (15).

3. The energy-saving and emission-reduction device for a gas boiler according to claim 1, characterized in that: The limiting member includes a moving block (13), a clamping block (19) and a sliding rod (20). A sliding groove (14) and a first groove (18) are provided on the box cover (7). The moving block (13) is slidably arranged in the sliding groove (14), and the clamping block (19) is slidably arranged in the first groove (18). The sliding rod (20) is located between the moving block (13) and the clamping block (19) and is fixedly connected to the moving block (13) at one end and fixedly connected to the clamping block (19) at the other end. The sliding rod (20) penetrates through the box cover (7) and is in sliding fit with the box cover (7). A second groove (25) is provided on the filter box (4), and the clamping block (19) is in contact plugging limiting fit with the second groove (25).

4. The energy-saving and emission-reduction device for a gas boiler according to claim 3, characterized in that: A spring (21) is arranged in the first groove (18). The spring (21) is sleeved on the sliding rod (20). One end of the spring (21) is fixedly connected to the clamping block (19), and the other end is fixedly connected to the box cover (7).

5. The energy-saving and emission-reduction device for a gas boiler according to claim 1, wherein: A plurality of filter plates (17) are clamped on the support plate (15).

6. The energy-saving and emission-reduction device for a gas boiler according to claim 1, wherein: A water tank (10) is fixedly arranged in the boiler (11). The water tank (10) is fixedly communicated with a water inlet pipe (3) and a diversion pipe (12). The water inlet pipe (3) penetrates through the boiler (11) and the protective shell (1) and is connected to a water pump. The diversion pipe (12) penetrates through the boiler (11) and the protective shell (1) and is fixedly communicated with a water outlet pipe (2).

7. The energy-saving and emission-reduction device for a gas boiler according to claim 6, characterized in that: The diversion pipe (12) spirally surrounds the boiler (11).

8. The energy-saving and emission-reduction device for a gas boiler according to claim 6, characterized in that: The exhaust assisting component comprises an air pump (6), and the air pump (6) is fixedly arranged in the exhaust pipe (5).

9. The energy-saving and emission-reduction device for a gas boiler according to claim 6, characterized in that: The exhaust assisting assembly comprises a piston (22) and a driving unit for driving the piston (22) to slide; the exhaust pipe (5) is a right-angled elbow pipe, comprising a No. 1 pipe connected to the filter box (4) and a No. 2 pipe connected to the boiler (11), the No. 1 pipe and the No. 2 pipe being perpendicular to each other and fixedly connected; a piston pipe is fixedly connected to the exhaust pipe (5), the piston (22) is slidably arranged in the piston pipe and is in contact-sealed sliding cooperation with the No. 2 pipe of the exhaust pipe (5); the piston (22) is in contact-sealed cooperation with the No. 1 pipe of the exhaust pipe (5); the driving unit is in transmission cooperation with the water flow in the water tank (10), and the piston (22) is in transmission connection with the driving unit.

10. An energy-saving and emission-reduction device for a gas boiler according to claim 9, characterized in that: The drive unit comprises a fan blade (24) and a second screw rod (23), wherein the second screw rod (23) is a reciprocating screw rod; the second screw rod (23) is located in the No. 2 pipe of the exhaust pipe (5) and one end of the second screw rod is threadedly connected to the piston (22), and the other end of the second screw rod penetrates into the water tank (10) and is sealed and rotatably connected to the water tank (10); the fan blade (24) is located in the water tank (10) and is coaxially fixedly connected to the second screw rod (23); the fan blade (24) cooperates with the water flow transmission in the water tank (10); the second screw rod (23), the piston (22) and the ball together constitute a ball screw pair.

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