Energy-saving dust removal device for coal-fired boiler

Abstract

The energy-saving dust removal device for the coal-fired boiler comprises a box body, a water inlet part and a water outlet part are installed on the outer wall of one side of the box body, a first partition plate and a second partition plate are welded between the inner walls of the two sides of the box body, a filter screen is fixed to the bottom of the first partition plate through screws, and a spiral pipe is fixed to the top of the second partition plate; a sliding way is fixed to the inner wall of one side of the box body through screws, a floating ball assembly is movably connected to the inner wall of the sliding way, a vertical plate is fixed to the inner wall of the top of the box body, and an elastic piece is movably connected to the surface of the vertical plate. Water is injected into the upper cavity, so that water is heated by waste heat of boiler flue gas and then utilized, meanwhile, buoyancy of the water on the floating ball body can be utilized, the water in the upper cavity can be automatically guided out after reaching a certain temperature interval, and a scraper blade can be driven by the buoyancy of the water to clean particulate matter attached to the filter screen; and no control equipment is needed in the whole process, so that the device is more energy-saving during dust removal, and the use cost is lower.

Description

Technical Field

[0001] The invention relates to the technical field of energy-saving dust removal, and in particular to an energy-saving dust removal device for a coal-fired boiler. Background Art

[0002] In the prior art, a coal-fired boiler generates tail gas during use, and the tail gas contains substances such as sulfide and solid particles. Therefore, the tail gas needs to be dusted when it is discharged to reduce the content of particles in the tail gas. The existing coal-fired boiler usually adopts a spraying method when storing. Although the spraying method can achieve dust removal for the tail gas, there is a dead angle in the spraying, so that the particles in the tail gas cannot be completely treated during the treatment of the tail gas;

[0003] After searching, the Chinese patent application number 202323060444.8 discloses an integrated dust removal device for a coal-fired boiler, including a boiler dust removal cylinder, a bracket is provided at the bottom of the boiler dust removal cylinder, an air inlet is provided on one side of the boiler dust removal cylinder, a water tank is provided on the other side of the boiler dust removal cylinder, an air outlet is provided at the lower end of the water tank, a second linkage rod is provided at the top of the boiler dust removal cylinder, a third linkage rod is provided at the bottom of the boiler dust removal cylinder, a stirring rod is provided at the bottom end of the boiler dust removal cylinder, and a spray device is provided at the top end of the boiler dust removal cylinder.

[0004] The integrated dust removal device for a coal-fired boiler in the above patent has the following shortcomings: although the water sprinkler can increase the spray range, there is a spray dead angle when the water sprinkler adjusts the spray range, so that part of the flue gas is not completely treated and is discharged from the outlet, and the treatment effect on the exhaust gas cannot be guaranteed. Summary of the invention

[0005] In view of this, an embodiment of the present invention hopes to provide an energy-saving dust removal device for a coal-fired boiler to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is achieved as follows: an energy-saving dust removal device for a coal-fired boiler comprises a box body, an outer wall of one side of the box body is respectively installed with a water inlet and a water outlet, partition one and partition two are respectively welded between the inner walls on both sides of the box body, and a filter screen is fixed to the bottom of partition one by screws, and a spiral tube is fixed to the top of partition two, a slide is fixed to the inner wall of one side of the box body by screws, and a float assembly is movably connected to the inner wall of the slide, a vertical plate is fixed to the inner wall of the top of the box body, and an elastic part is movably connected to the surface of the vertical plate, a pad is fixed to the outer wall of the top of the partition two, and an inflatable driving part is connected between the top of the pad and the elastic part, the bottom of the float assembly is connected to a pulley mechanism, and one end of the pull rope is connected to a telescopic part, and a scraper for cleaning the filter screen is fixed to the output end of the telescopic part.

[0007] In some embodiments, the elastic member includes a limit plate and a sliding rod, the sliding rod is movably connected to the inner wall of the through hole opened on the surface of the vertical plate, and the limit plate and the sliding rod are welded and fixed, a rolling ball is movably connected to the bottom of the limit plate, one end of the sliding rod is fixed with a movable plate by screws, and a spring is clamped between the outer wall of one side of the movable plate and the limit plate.

[0008] In some embodiments, the float assembly includes a mounting column, a slide plate and a float body, the slide plate is movably connected to the inner wall of the slide, and the mounting column is welded to the outer wall of the slide plate, and the float body is fixed to the bottom of the mounting column by screws, and a connecting column fixedly connected to the pull rope is welded to the bottom of the float body.

[0009] In some embodiments, the inflatable drive component includes an inflation cylinder and a mounting shell, the mounting shell is embedded in the inner wall of a through hole opened on the surface of the vertical plate, and an airbag is bonded to the inner wall of one side of the mounting shell, and the airbag and the inflation cylinder are connected by a conveying tube, a driving rod is fixed between the movable plate and the airbag, and the driving rod and the mounting shell are movably connected.

[0010] In some embodiments, the pulley mechanism includes a pulley body and a receiving plate, the receiving plate is fixed to a bottom outer wall of the partition by screws, and the pulley body is movably connected to an outer wall of one side of the receiving plate.

[0011] In some embodiments, the telescopic member includes a piston cylinder and a accommodating plate, the piston cylinder is fixed to the inner wall of one side of the box body by screws, and the piston rod is movably connected to the circumferential inner wall of the piston cylinder, and a spring 2 is clamped between the piston rod and the piston cylinder, and the piston rod and the pull rope are fixedly connected, and the scraper and the piston rod are fixedly connected.

[0012] In some embodiments, a one-way valve 1 is fixed at one end of the piston cylinder, and the one-way valve 1 and the box body are connected by a connecting pipe, a one-way valve 2 is fixed at the top of the piston cylinder, and a spray plate is fixed on the outer wall of one side of the scraper, and the spray plate and the one-way valve 2 are connected by a water spray pipe.

[0013] In some embodiments, the water inlet part includes a ball valve 1 and a pipe 1, the pipe 1 is welded to the outer wall of one side of the box body, and the ball valve 1 and the pipe 1 are fixedly connected, and the water outlet part includes a pipe 2 and a ball valve 2, the pipe 2 is fixed to the outer wall of one side of the box body, and the ball valve 2 and the pipe 2 are fixedly connected.

[0014] In some embodiments, a discharge door is connected to one side of the box body via a hinge, and a ramp is fixed to the inner wall of the bottom of the box body.

[0015] In some embodiments, a smoke exhaust pipe is welded to one side of the box.

[0016] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0017] 1. An energy-saving dust removal device for a coal-fired boiler, which injects water into an upper chamber so that the water is heated by the waste heat of the boiler flue gas and then utilized. At the same time, the buoyancy of the water on the float body can also be utilized, so that when the water in the upper chamber reaches a certain temperature range, it is automatically discharged, and the buoyancy of the water can be used to drive a scraper to clean the particles attached to the filter screen. No control equipment is required throughout the process, so that the device is more energy-efficient in dust removal and has a lower cost of use.

[0018] 2. An energy-saving dust removal device for a coal-fired boiler utilizes the characteristic of gas expansion due to heat, so that after the airbag expands, it drives the limit plate and the slide rod to move, thereby releasing the limit on the mounting column. When the water temperature reaches a certain temperature range, the slide plate follows the floating ball body to rise and is misaligned with the pipe 2, so that the heated water is automatically discharged through the pipe 2 and the ball valve 2.

[0019] 3. An energy-saving dust removal device for a coal-fired boiler, which is provided with three chambers, namely, upper, middle and lower chambers, which can respectively realize the utilization of waste heat of boiler flue gas, the discharge of purified boiler flue gas and the collection of filtered particulate matter, thereby improving the integration of the device.

[0020] 4. An energy-saving dust removal device for a coal-fired boiler utilizes the reciprocating motion of a piston rod relative to a piston cylinder so that a small amount of water in an upper chamber flushes a filter screen through a spray plate, thereby improving the cleaning effect of particulate matter on the filter screen.

[0021] 5. An energy-saving dust removal device for a coal-fired boiler, which stores filtered and trapped particles by providing a lower chamber, and when the discharge door is opened, the inclined platform facilitates the discharge of the particles.

[0022] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is the overall structure diagram of the present invention;

[0025] Figure 2It is a cross-sectional structural diagram of the present invention;

[0026] Figure 3 This is the overall structural diagram of the waste heat recovery unit of the present invention;

[0027] Figure 4 It is a partial structural diagram of the waste heat recovery unit of the present invention;

[0028] Figure 5 It is a structural diagram of the driving member of the present invention;

[0029] Figure 6 The overall structure diagram of the dust removal part of the present invention;

[0030] Figure 7 The bottom structure diagram of the dust removal part of the present invention;

[0031] Figure 8 It is a partial structural diagram of the dust removal part of the present invention;

[0032] Reference numerals:

[0033] Box body 1; ball valve 1 2; pipe 1 3; pipe 2 4; ball valve 2 5; spiral tube 6; connecting pipe 7; discharge door 8; partition 1 9; partition 2 10; limit plate 11; slide rod 12; vertical plate 13; moving plate 14; mounting column 15; slide plate 16; float body 17; pad 18; inflator 19; spring 1 20; slideway 21; delivery pipe 22; air bag 23; mounting shell 24; piston rod 25; driving rod 26; connecting column 27; filter screen 28; one-way valve 1 29; exhaust pipe 30; spray plate 31; scraper 32; pulley body 33; accommodating plate 34; pull rope 35; piston cylinder 36; water spray pipe 37; one-way valve 1 38; spring 2 39. DETAILED DESCRIPTION

[0034] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Embodiment 1:

[0038] like Figure 1-8 As shown, an energy-saving dust removal device for a coal-fired boiler comprises a box body 1, a water inlet and a water outlet are respectively installed on the outer wall of one side of the box body 1, a partition 9 and a partition 2 10 are respectively welded between the inner walls on both sides of the box body 1, and a filter screen 28 is fixed to the bottom of the partition 9 by screws, and a spiral tube 6 is fixed to the top of the partition 2 10, a slide 21 is fixed to the inner wall of one side of the box body 1 by screws, and a float assembly is slidably connected to the inner wall of the slide 21, a vertical plate 13 is fixed to the inner wall of the top of the box body 1 by bolts, and an elastic member is slidably connected to the surface of the vertical plate 13, a pad 18 is fixed to the outer wall of the top of the partition 2 10 by bolts, and an inflatable driving member is connected between the top of the pad 18 and the elastic member, a pull rope 35 is connected to the bottom of the float assembly through a pulley mechanism, and one end of the pull rope 35 is connected to a telescopic member, and a scraper 32 for cleaning the filter screen 28 is fixed to the output end of the telescopic member;

[0039] The interior of the box body 1 is divided into three chambers, namely, an upper chamber, a middle chamber and a lower chamber, by providing a partition 1 9 and a partition 2 10. The upper chamber is connected to the water inlet and the water outlet. The spiral tube 6 is used to transport the boiler flue gas, and the gas outlet end of the spiral tube 6 is connected to the lower chamber. By setting the spiral tube 6 in a spiral shape, the time the boiler flue gas stays in the upper chamber can be increased. When water enters the upper chamber from the water inlet, the high temperature of the boiler flue gas in the spiral tube 6 can be used to heat the water, thereby utilizing the waste heat of the boiler flue gas, thereby improving the energy-saving and environmental protection effect.

[0040] As water continuously enters the upper chamber through the water inlet, the liquid level in the upper chamber rises, causing the float assembly to rise along the slide 21 under the action of the buoyancy of the water. The water inlet is located above the water outlet, so that the float assembly gradually blocks the water inlet during the rising process, reducing the amount of water entering the water inlet. This can prevent excessive water from entering the upper chamber at one time, and prolong the time it takes for the water to be heated to the set temperature range. The float assembly always keeps in contact with the water outlet during the rising process, and the water outlet is temporarily blocked by the float assembly, thereby preventing water from overflowing from the water outlet during the water inlet.

[0041] During the rising process, the float assembly pulls the pull rope 35 through the pulley mechanism, and during the movement of the pull rope 35, the output end of the telescopic member is pulled, thereby synchronously driving the scraper 32 to move along the filter screen 28. Since the gas outlet end of the spiral tube 6 and the lower chamber are connected, when the boiler smoke is led out from the gas outlet end into the lower chamber, the filter screen 28 is used to filter and clean the larger particles in the boiler smoke. The filtered boiler smoke passes through the filter screen 28 and enters the middle chamber. The scraper 32 scrapes off the particles attached to the filter screen 28 while sliding along the bottom of the filter screen 28, thereby preventing the particles from clogging the filter holes on the filter screen 28 and affecting the passage of the filtered boiler smoke.

[0042] When the top of the float assembly moves to the bottom of the elastic member, the elastic member is used to limit the float assembly. At this time, a small gap is left between the float assembly and the water inlet, so that the water in the water inlet enters the upper chamber at a small flow rate. As the water continues to enter the upper chamber through the gap, the float assembly is limited by the elastic member, so that the bottom of the float assembly is gradually immersed in the water. At the same time, the water level in the upper chamber gradually covers the pad 18 and contacts the pneumatic drive member. At the same time, as the high-temperature boiler flue gas in the spiral tube 6 heats the water, when the pneumatic drive member is heated, the pneumatic drive member drives the elastic member to slide along the vertical plate 13 to release the limit on the float assembly by utilizing the thermal expansion principle. After the float assembly loses its limit, the bottom portion originally immersed in water will rise rapidly under the buoyancy of water, and the float assembly will no longer remain in contact with the water outlet during the continued rise. At the same time, the float assembly blocks the small gap between it and the water inlet, so that the water inlet is no longer inlet with water, and the water heated by the high-temperature boiler flue gas is discharged through the water outlet for utilization. As the water is discharged, the liquid level in the upper chamber gradually decreases. When the float assembly moves down to fit the water outlet again, the liquid level in the upper chamber no longer decreases, so that the water inlet again introduces water into the upper chamber through the gap. In this way, the water is periodically heated and utilized, and the filter screen 28 can be cleaned reciprocatingly.

[0043] The elastic member includes a limit plate 11 and a slide rod 12, the slide rod 12 is slidably connected to the inner wall of the through hole opened on the surface of the vertical plate 13, and the limit plate 11 and the slide rod 12 are welded and fixed, a rolling ball is movably connected to the bottom of the limit plate 11, one end of the slide rod 12 is fixed with a moving plate 14 by a screw, and a spring 20 is clamped between the outer wall of one side of the moving plate 14 and the limit plate 11;

[0044] The maximum moving height of the float assembly in the vertical direction can be limited by providing the limit plate 11 .

[0045] The water inlet portion includes a ball valve 2 and a pipe 3, the pipe 3 is welded to the outer wall of one side of the box body 1, and the ball valve 2 and the pipe 3 are fixedly connected by bolts, and the water outlet portion includes a pipe 2 4 and a ball valve 2 5, the pipe 2 4 is fixed to the outer wall of one side of the box body 1 by bolts, and the ball valve 2 5 and the pipe 2 4 are fixed by bolts;

[0046] By providing a ball valve 2 and a pipe 3, water can be introduced into the upper chamber, and the heated water can be discharged for use using a pipe 4 and a ball valve 5.

[0047] The float assembly includes a mounting post 15, a slide plate 16 and a float body 17, wherein the slide plate 16 is slidably connected to the inner wall of the slideway 21, and the mounting post 15 is welded to the outer wall of the slide plate 16, and the float body 17 is fixed to the bottom of the mounting post 15 by screws, and a connecting post 27 fixedly connected to the pull rope 35 is welded to the bottom of the float body 17;

[0048] In the initial stage, when there is no water in the upper chamber, the float body 17 fits against the outer wall of the top of the partition 10 under the action of its own gravity. At this time, the slide 16 blocks the end of the pipe 24. As water is introduced into the upper chamber from the pipe 13 and the ball valve 12, the float body 17 drives the slide 16 to rise along the slideway 21 under the buoyancy of the water. When the top of the mounting column 15 moves to fit the limit plate 11, it is limited by the limit plate 11. At this time, the top of the slide 16 is as shown in FIG. Figure 3 A certain gap is retained between the ends of the pipe 1 and 3, so that water continues to enter the upper chamber at a smaller flow rate.

[0049] The inflatable driving member includes an inflatable cylinder 19 and a mounting shell 24, the mounting shell 24 is embedded in the inner wall of a through hole opened on the surface of the vertical plate 13, and an air bag 23 is bonded to the inner wall of one side of the mounting shell 24, and the air bag 23 and the inflatable cylinder 19 are connected by a delivery pipe 22, a driving rod 26 is fixed between the moving plate 14 and the air bag 23, and the driving rod 26 and the mounting shell 24 are slidably connected;

[0050] When the water in the upper chamber gradually rises and covers the inflation tube 19, as the water temperature rises, the gas stored in the inflation tube 19 expands due to the heat, and the airbag 23 is deformed under the push of the expanding gas, thereby driving the driving rod 26 and the movable plate 14 to move laterally to drive the slide bar 12, so that the limit plate 11 slides along the top of the mounting column 15, thereby detaching from the mounting column 15, so that the mounting column 15 and the float body 17 rise under the buoyancy of the water. In this example, the limiting distance of the rolling ball at the bottom of the limit plate 11 to the top of the mounting column 15 is preferably 5mm, so that the airbag 23 drives the slide bar 12 and the limit plate 11 to move a shorter distance after expansion and deformation, that is, the limit plate 11 is detached from the mounting column 15.

[0051] The pulley mechanism includes a pulley body 33 and a receiving plate 34, wherein the receiving plate 34 is fixed to the outer wall of the bottom of the partition 9 by screws, and the pulley body 33 is rotatably connected to the outer wall of one side of the receiving plate 34;

[0052] The pulley body 33 can guide the moving path of the pull rope 35 .

[0053] The telescopic member includes a piston cylinder 36 and a receiving plate 34, wherein the piston cylinder 36 is fixed to the inner wall of one side of the box body 1 by screws, and the piston rod 25 is slidably connected to the inner wall of the circumference of the piston cylinder 36, and a spring 2 39 is clamped between the piston rod 25 and the piston cylinder 36, and the piston rod 25 and the pull rope 35 are fixedly connected, and the scraper 32 and the piston rod 25 are fixedly connected;

[0054] The piston cylinder 36 and the piston rod 25 can be used to guide the moving path of the scraper 32 so that the scraper 32 can remain stable during the movement along the filter screen 28 .

[0055] A discharge door 8 is connected to one side of the box body 1 through a hinge, and an inclined platform is fixed to the inner wall of the bottom of the box body 1;

[0056] The lower chamber is provided to store the filtered and retained particles, and when the discharge door 8 is opened, the inclined platform facilitates the discharge of the particles.

[0057] A smoke exhaust pipe 30 is welded to one side of the box body 1;

[0058] The smoke exhaust pipe 30 is connected to the middle chamber, and the filtered boiler smoke can be discharged through the smoke exhaust pipe 30.

[0059] In this embodiment: in the initial stage, the upper chamber remains dry, and the float body 17 fits against the partition 2 10 under the action of its own gravity. Then, the boiler flue gas is introduced into the spiral tube 6, and the ball valve 12 and the ball valve 25 are both opened. Then, water enters the upper chamber through the ball valve 2 and the pipe 13. As the liquid level in the upper chamber continues to rise, the float body 17 drives the slide 16 to move up along the slide 21 under the action of buoyancy. When the mounting column 15 moves to the bottom of the limit plate 11, it no longer moves. At this time, a certain gap is retained between the top of the slide 16 and the opening of the pipe 3, so that water continues to enter the upper chamber through the gap at a lower flow rate. As the water level in the upper chamber continues to rise, the water gradually submerges the float body 17. At the same time, the waste heat of the boiler flue gas is used to heat the water. Heating, when the water submerges the air cylinder 19, the high temperature is used to expand the gas in the air cylinder 19, and the expanded gas causes the air bag 23 to drive the limit plate 11 and the slide rod 12 to move after deformation, and the rolling ball at the bottom of the limit plate 11 moves along the top of the mounting column 15 and detaches from the mounting column 15. At this time, the float body 17 immersed in the water rises rapidly under the action of buoyancy until the top of the mounting column 15 and the top inner wall of the box body 1 fit together and no longer move. At this time, the slide plate 16 closes the pipeline 13, and an opening is generated between the bottom of the slide plate 16 and the pipeline 24 so that the water is discharged through the pipeline 24 and the ball valve 25 for use. As the liquid level in the upper chamber decreases, the float body 17 moves downward under the action of its own gravity, and at the same time, the water no longer submerges the air cylinder 19, so that the air bag 23 gradually returns to its initial state;

[0060] In the process of floating up and down, the float body 17 drives the pull rope 35 and the scraper 32 to move along the bottom of the filter screen 28 through the connecting column 27, so as to scrape off the particles attached to the filter screen 28.

[0061] Embodiment 2:

[0062] An energy-saving dust removal device for a coal-fired boiler. This embodiment makes the following supplements on the basis of embodiment 1: Figure 1-8 As shown, a one-way valve 29 is fixed at one end of the piston cylinder 36, and the one-way valve 29 and the box body 1 are connected through a connecting pipe 7, a one-way valve 38 is fixed on the top of the piston cylinder 36, and a spray plate 31 is fixed on the outer wall of one side of the scraper 32, and the spray plate 31 and the one-way valve 38 are connected through a water spray pipe 37;

[0063] When the piston rod 25 moves along the piston cylinder 36, the water in the upper chamber is sucked through the one-way valve 29 and the connecting pipe 7 by negative pressure. When the piston rod 25 moves back, the water is introduced into the spray plate 31 through the one-way valve 38 and the water spray pipe 37, and finally sprayed onto the surface of the filter screen 28.

[0064] Water is sprayed toward the surface of the filter screen 28 through the spray plate 31 , so that the particles in the filter holes of the filter screen 28 can be washed. The water and the scraper 32 can improve the effect of cleaning the particles on the filter screen 28 .

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An energy-saving dust removal device for a coal-fired boiler, comprising a housing (1), characterized in that: The outer wall of one side of the box body (1) is respectively provided with a water inlet and a water outlet. A partition plate 1 (9) and a partition plate 2 (10) are respectively welded between the inner walls on both sides of the box body (1). A filter screen (28) is fixed to the bottom of the partition plate 1 (9) by screws. A spiral tube (6) is fixed to the top of the partition plate 2 (10). A slideway (21) is fixed to the inner wall of one side of the box body (1) by screws. A float assembly is movably connected to the inner wall of the slideway (21). A vertical plate (13) is fixed to the inner wall of the top of the box body (1). An elastic member is movably connected to the surface of the vertical plate (13). A pad (18) is fixed to the outer wall of the top of the partition plate 2 (10). An inflatable driving member is connected between the top of the pad (18) and the elastic member. A pull rope (35) is connected to the bottom of the float assembly through a pulley mechanism. One end of the pull rope (35) is connected to a telescopic member. A scraper (32) for cleaning the filter screen (28) is fixed to the output end of the telescopic member.

2. The energy-saving dust removal device for a coal-fired boiler according to claim 1, characterized in that: The elastic member comprises a limit plate (11) and a slide rod (12), wherein the slide rod (12) is movably connected to the inner wall of a through hole opened on the surface of the vertical plate (13), and the limit plate (11) and the slide rod (12) are welded and fixed, a rolling ball is movably connected to the bottom of the limit plate (11), a movable plate (14) is fixed to one end of the slide rod (12) by screws, and a spring (20) is clamped between the outer wall of one side of the movable plate (14) and the limit plate (11) 3.

3. The energy-saving dust removal device for a coal-fired boiler according to claim 2 is characterized in that: The float assembly comprises a mounting column (15), a slide plate (16) and a float body (17); the slide plate (16) is movably connected to the inner wall of the slideway (21); the mounting column (15) is welded to the outer wall of the slide plate (16); the float body (17) is fixed to the bottom of the mounting column (15) by screws; and a connecting column (27) fixedly connected to the pull rope (35) is welded to the bottom of the float body (17).

4. The energy-saving dust removal device for a coal-fired boiler according to claim 3 is characterized in that: The inflatable driving member comprises an inflatable cylinder (19) and a mounting shell (24), wherein the mounting shell (24) is embedded in the inner wall of a through hole opened on the surface of the vertical plate (13), and an air bag (23) is bonded to the inner wall of one side of the mounting shell (24), and the air bag (23) and the inflatable cylinder (19) are connected via a delivery pipe (22), and a driving rod (26) is fixed between the movable plate (14) and the air bag (23), and the driving rod (26) and the mounting shell (24) are movably connected.

5. The energy-saving dust removal device for a coal-fired boiler according to claim 3 is characterized in that: The pulley mechanism comprises a pulley body (33) and a receiving plate (34); the receiving plate (34) is fixed to the bottom outer wall of the partition plate (9) by screws, and the pulley body (33) is movably connected to the outer wall of one side of the receiving plate (34).

6. The energy-saving dust removal device for a coal-fired boiler according to claim 5, characterized in that: The telescopic member comprises a piston cylinder (36) and a receiving plate (34); the piston cylinder (36) is fixed to the inner wall of one side of the box body (1) by means of screws, and the piston rod (25) is movably connected to the circumferential inner wall of the piston cylinder (36); a second spring (39) is clamped between the piston rod (25) and the piston cylinder (36); the piston rod (25) and the pull rope (35) are fixedly connected; and the scraper (32) and the piston rod (25) are fixedly connected.

7. The energy-saving dust removal device for a coal-fired boiler according to claim 6, characterized in that: A one-way valve (29) is fixed to one end of the piston cylinder (36), and the one-way valve (29) and the box body (1) are connected via a connecting pipe (7). A one-way valve (38) is fixed to the top of the piston cylinder (36), and a spray plate (31) is fixed to the outer wall of one side of the scraper (32), and the spray plate (31) and the one-way valve (38) are connected via a water spray pipe (37).

8. The energy-saving dust removal device for a coal-fired boiler according to claim 7, characterized in that: The water inlet portion comprises a ball valve (2) and a pipe (3), wherein the pipe (3) is welded to the outer wall of one side of the box body (1), and the ball valve (2) and the pipe (3) are fixedly connected, and the water outlet portion comprises a pipe (4) and a ball valve (5), wherein the pipe (4) is fixed to the outer wall of one side of the box body (1), and the ball valve (5) and the pipe (4) are fixedly connected.

9. The energy-saving dust removal device for a coal-fired boiler according to claim 8, characterized in that: One side of the box body (1) is connected to a discharge door (8) via a hinge, and an inclined platform is fixed to the inner wall of the bottom of the box body (1).

10. The energy-saving dust removal device for a coal-fired boiler according to claim 9, characterized in that: A smoke exhaust pipe (30) is welded to one side of the box body (1).

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