A method for reducing the heat loss of boiler flue gas

Abstract

The present invention relates to a method for reducing heat loss of boiler flue gas, comprising: step 1, when the boiler is running, fuel needs to be burned, and burning fuel will release exhaust gas, so it is necessary to reduce the heat loss of boiler flue gas, utilize it, and increase the use efficiency of the boiler. The present invention is novel in design. When the heat is too high, mercury expands and pushes the push plate in the liquid storage tube to move up, the moving push plate moves the push rod fixed thereon to move up, and the moving push rod pushes the sliding block to move. When the sliding block moves to a certain position, it will resist the button above, and acetylene and air are mixed through two piston cylinders and pushed into the protective cylinder. Because the temperature in the furnace is high, the mixed gas explodes, generating a certain shock wave to remove the ash accumulation at the heated area, and the ash accumulation at the heated area is removed in time according to the temperature change, and the air and acetylene are accurately proportioned to keep the shock wave of the explosion stable, thereby reducing the heat loss of boiler flue gas and improving the efficiency of the boiler.

Description

Technical Field

[0001] The present invention relates to the field of boilers, and specifically to a method for reducing the heat loss of boiler flue gas. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes the chemical energy in fuel, electrical energy, and the boiler outputs steam, high-temperature water or organic heat carriers with a certain amount of heat energy. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's livelihood, or can be converted into mechanical energy through a steam power device. However, this energy conversion will result in losses, and the heat loss of the flue gas is also one of the losses;

[0003] There are many methods to reduce the heat loss of flue gas. Among them, acetylene blasting for soot cleaning is one of the methods to reduce the heat loss of flue gas. Acetylene blasting for soot cleaning mixes air and acetylene and detonates them to generate shock waves for soot cleaning. The commonly used acetylene blasting for soot cleaning uses a certain gas mixture ratio. However, the different fuels burned in the boiler result in different air contents in the boiler, making the sizes of the shock waves generated by detonation different. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for reducing the heat loss of boiler flue gas to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A method for reducing the heat loss of boiler flue gas includes the following steps:

[0007] Step 1: When the boiler is operating, fuel needs to be burned, and burning fuel will release waste gas. To reduce the heat loss of boiler flue gas and make use of it, the use efficiency of the boiler is increased;

[0008] Step 2: When the heat loss of boiler flue gas is too large, start the acetylene blasting soot cleaning device on one side;

[0009] Step 3: The acetylene blasting soot cleaning device mixes acetylene and air, and uses the shock wave generated by the explosion to remove the ash deposited on the heating surface at the tail of the boiler;

[0010] Step 4: Of course, the acetylene blasting soot cleaning device may not be able to remove the ash on the heating surface at one time, and multiple removals are carried out through the monitoring of the acetylene blasting soot cleaning device.

[0011] As a further scheme of the present invention: The acetylene blasting soot cleaning device includes a bottom plate arranged below the boiler. The boiler is fixedly installed on the bottom plate. One side of the boiler is fixedly installed with a flue gas pipe communicated with its interior. The end of the flue gas pipe far from the boiler is installed with a monitoring component;

[0012] On one side of the boiler, an installation box is fixedly installed. Multiple support legs are fixedly installed at the bottom of the installation box, and the support legs are fixedly installed on the bottom plate. A protective cylinder extending into the boiler is fixedly installed inside the installation box, and an air intake component arranged inside the installation box is fixedly installed on one side of the protective cylinder.

[0013] As a further scheme of the present invention: The monitoring component includes a support frame fixedly installed on the exhaust pipe. A circular hole is opened on the support frame, and a liquid storage pipe is fixedly installed inside the circular hole. A push plate is slidably connected inside the liquid storage pipe, and mercury is filled inside the liquid storage pipe. A cylinder is fixedly installed on the support frame, a limiting rod is fixedly installed inside the cylinder, a sliding block sliding on the limiting rod is fixedly installed at one end of the push rod away from the push plate, and a button is fixedly installed inside the cylinder.

[0014] As a further scheme of the present invention: The air intake component includes a liquid outlet pipe fixed on one side of the protective cylinder. Piston cylinders are fixedly installed at both air intake ends of the liquid outlet pipe. An air inlet pipe extending outside the installation box is fixedly installed on one side of the piston cylinder. Check valves are fixedly installed on both the air inlet pipe and the liquid outlet pipe. The piston cylinder is fixedly installed with a support column for supporting it, and the support column is fixedly installed inside the installation box.

[0015] As a further scheme of the present invention: A piston block is slidably connected inside the piston cylinder. A piston rod extending outside the piston cylinder is fixedly installed on one side of the piston block. A fixing plate is fixedly installed at one end of the piston rod away from the piston block. A compression spring sleeved on the piston rod is abutted between the fixing plate and the piston cylinder.

[0016] As a further scheme of the present invention: A push plate is arranged inside the installation box. Multiple telescopic rods are fixedly installed on one side of the push plate. The movable ends of the telescopic rods are abutted against the fixing plate on one side. Threaded holes are opened at the fixed ends of the telescopic rods, and threaded knobs abutted against the movable ends of the telescopic rods are threadedly connected inside the threaded holes. A push block is fixedly installed on the other side of the push plate, and a connecting column is fixedly installed on one side of the push block.

[0017] As a further scheme of the present invention: A servo motor is fixedly installed inside the installation box. A turntable is fixedly installed on the output shaft of the servo motor. A through chute is opened on the turntable. A threaded rod is rotatably connected inside the through chute. A slider sliding inside the through chute is threadedly connected to the threaded rod. A cylinder is fixedly installed on the slider. A connecting rod is rotatably connected to the cylinder. The other side of the connecting rod away from the cylinder is rotatably connected to the connecting column.

[0018] As a further scheme of the present invention: A circular hole is opened on one side of the boiler, a feed inlet is fixedly installed on the circular hole, a liquid outlet pipe is fixedly installed on one side of the boiler, and a liquid inlet pipe is fixedly installed on the boiler.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the present invention is novel in design, when the heat is too high, the mercury expands and pushes the push plate in the liquid storage tube to move up, the moving push plate moves the push rod fixed thereon to move up, the moving push rod pushes the sliding block to move, and when the sliding block moves to a certain position, it will resist the button above, and acetylene and air are mixed through two piston cylinders and pushed into the protective cylinder. Because the temperature in the furnace is high, the mixed gas explodes, generating a certain shock wave to remove the ash accumulated on the heated area, and the ash accumulated in the heated area is removed in time according to the temperature change, and the air and acetylene are accurately proportioned to keep the shock wave of the explosion stable, thereby reducing the heat loss of boiler exhaust and improving boiler efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a method for reducing heat loss from boiler exhaust gas.

[0021] Figure 2 A schematic diagram of the side structure of a boiler in one embodiment of a method for reducing heat loss from boiler exhaust gas.

[0022] Figure 3 A schematic diagram of the internal structure of a boiler in one embodiment of a method for reducing heat loss from boiler exhaust gas.

[0023] Figure 4 A schematic diagram of the internal structure of a smoke exhaust pipe in one embodiment of a method for reducing heat loss from boiler smoke exhaust.

[0024] Figure 5 A schematic diagram of the internal structure of an installation box in one embodiment of a method for reducing heat loss from boiler exhaust gas.

[0025] Figure 6 A schematic diagram of the enlarged structure of a telescopic rod in one embodiment of a method for reducing heat loss from boiler exhaust gas.

[0026] Figure 7 A schematic diagram of the enlarged structure of a turntable in one embodiment of a method for reducing heat loss from boiler exhaust gas.

[0027] In the figure: 1. bottom plate; 2. boiler; 3. feed port; 4. smoke exhaust pipe; 5. cylinder; 6. installation box; 7. servo motor; 10. air inlet pipe; 11. protective cylinder; 12. liquid storage tube; 13. support frame; 15. push rod; 16. limit rod; 17. sliding block; 18. liquid outlet pipe; 19. one-way valve; 20. piston cylinder; 21. piston rod; 22. compression spring; 23. fixing plate; 24. telescopic rod; 25. threaded knob; 26. push plate; 27. push block; 28. connecting column; 29. ​​turntable; 30. connecting rod; 31. threaded rod; 32. sliding block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation manner.

[0030] Please refer to Figures 1 to 7 , in the embodiment of the present invention, a method for reducing the heat loss of boiler flue gas includes:

[0031] Step 1: When the boiler 2 operates, fuel needs to be burned, and burning fuel will release waste gas. It is necessary to reduce the heat loss of the boiler 2 flue gas and utilize it to increase the use efficiency of the boiler 2;

[0032] Step 2: When the heat loss of the boiler 2 flue gas is too large, start the acetylene blasting soot cleaning device on one side;

[0033] Step 3: The acetylene blasting soot cleaning device mixes acetylene and air, and uses the shock wave generated by the explosion to remove the ash deposited on the heating surface at the tail of the boiler 2;

[0034] Step 4: Of course, the acetylene blasting soot cleaning device may not be able to remove the ash on the heating surface at one time, and it is cleared multiple times through the monitoring of the acetylene blasting soot cleaning device.

[0035] The acetylene blasting soot cleaning device includes a bottom plate 1 disposed below the boiler 2, the boiler 2 is fixedly installed on the bottom plate 1, a smoke exhaust pipe 4 communicating with the inside of the boiler 2 is fixedly installed on one side of the boiler 2, and a monitoring component is installed at one end of the smoke exhaust pipe 4 away from the boiler 2.

[0036] Please refer to Figure 1 , Figure 4The monitoring component includes a support frame 13 fixedly mounted on the smoke exhaust pipe 4, a circular hole is opened on the support frame 13, a liquid storage tube 12 is fixedly mounted in the circular hole, a push plate is slidably connected in the liquid storage tube 12, and mercury is filled in the liquid storage tube 12, a cylinder 5 is fixedly mounted on the support frame 13, a limit rod 16 is fixedly mounted in the cylinder 5, a sliding block 17 sliding on the limit rod 16 is fixedly mounted on one end of the push rod 15 away from the push plate, and a button is fixedly mounted in the cylinder 5.

[0037] The smoke exhaust pipe 4 is set up because the operation of the boiler 2 generates smoke ash, and the smoke is discharged from the inside of the boiler 2 through the smoke exhaust pipe 4. Because the liquid storage tube 12 is filled with mercury, the smoke discharged through the smoke exhaust pipe 4 has a certain amount of heat. When the heat is too high, the mercury expands and pushes the push plate in the liquid storage tube 12 to move up. The moving push plate moves the push rod 15 fixed thereon to move up, and the moving push rod 15 pushes the sliding block 17 to move. When the sliding block 17 moves to a certain position, it will resist the button above, so that the acetylene blasting cleaning device is operated to clean the boiler and reduce the temperature of the boiler exhaust smoke.

[0038] Preferably, a temperature sensor is installed in the cylinder 5, and the temperature sensor is connected to the acetylene explosion cleaning device through a wire, and the operation time of the acetylene explosion cleaning device is controlled by the temperature sensor.

[0039] A mounting box 6 is fixedly installed on one side of the boiler 2, a plurality of supporting legs are fixedly installed on the bottom of the mounting box 6, the supporting legs are fixedly installed on the base plate 1, a protective cylinder 11 extending into the boiler 2 is fixedly installed in the mounting box 6, an air intake assembly arranged in the mounting box 6 is fixedly installed on one side of the protective cylinder 11.

[0040] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 The air intake assembly includes a liquid outlet pipe 18 fixed on one side of the protective cylinder 11, and piston cylinders 20 are fixedly installed on both air intake ends of the liquid outlet pipe 18. An air intake pipe 10 extending to the outside of the installation box 6 is fixedly installed on one side of the piston cylinder 20. A one-way valve 19 is fixedly installed on the air intake pipe 10 and the liquid outlet pipe 18. A support column is fixedly installed on the piston cylinder 20 to support it, and the support column is fixedly installed in the installation box 6.

[0041] Specifically, one piston cylinder 20 sucks air into its interior, while the other piston cylinder 20 is connected to an external acetylene storage device. Acetylene and air are mixed by the two piston cylinders 20 and then pushed into the protection cylinder 11. Because the temperature in the furnace is relatively high, the mixed gas explodes, generating a certain shock wave to remove the ash accumulation at the heat-receiving area. The piston cylinder 20 sucks through the intake pipe 10. Since a one-way valve 19 is installed on the intake pipe 10, the intake pipe 10 can only intake air, and the one-way valve 19 installed at the air outlet end of the liquid outlet pipe 18 enables the liquid outlet pipe 18 to only discharge gas.

[0042] Please refer to Figure 5 、 Figure 6 , a piston block is slidably connected inside the piston cylinder 20. One side of the piston block is fixedly installed with a piston rod 21 extending outside the piston cylinder 20. The side of the piston rod 21 away from the piston block is fixedly installed with a fixing plate 23. A compression spring 22 sleeved on the piston rod 21 is abutted between the fixing plate 23 and the piston cylinder 20.

[0043] Specifically, by pushing the fixing plate 23 to move, the moving fixing plate 23 pushes the piston rod 21 to move. While the fixing plate 23 is moving, the compression spring 22 is compressed. The moving piston rod 21 pushes the piston block sliding inside the piston cylinder 20 to move for discharging gas. When the fixing plate 23 is released, the compressed compression spring 22 pushes the fixing plate 23 back to its original position. The fixing plate 23 that returns to its original position pulls the piston block through the piston rod 21 for air intake.

[0044] Preferably, an electric telescopic rod is fixedly installed inside the [6]. The movable end of the electric telescopic rod is fixedly installed with the

[21] . The

[21] is controlled to move through the electric telescopic rod.

[0045] Please refer to Figure 5 、 Figure 6 , a push plate 26 is arranged inside the installation box 6. One side of the push plate 26 is fixedly installed with a plurality of telescopic rods 24. The movable ends of the telescopic rods 24 are abutted against one side of the fixing plate 23. Threaded holes are formed in the fixed ends of the telescopic rods 24. Threaded knobs 25 abutted against the movable ends of the telescopic rods 24 are threadedly connected in the threaded holes. The other side of the push plate 26 is fixedly installed with a push block 27. One side of the push block 27 is fixedly installed with a connecting column 28.

[0046] The set connecting column 28 moves. The moving connecting column 28 drives the connected push plate 26 to move to one side through the push block 27 fixed to it. The moving push plate 26 pushes the telescopic rod 24 on one side to move, so that the movable end of the telescopic rod 24 abuts against the fixed plate 23 and pushes the fixed plate 23 to move. Since the threaded knob 25 is threadedly connected to the telescopic rod 24, the movable end of the telescopic rod 24 will not expand or contract. Rotate the threaded knob 25 in the reverse direction, and the rotating threaded knob 25 moves away from the abutting movable end of the telescopic rod 24. At this time, the length of the telescopic rod 24 can be adjusted to change the mixing ratio of air and acetylene. Rotate 25 in the forward direction to keep the overall length of the telescopic rod 24 fixed.

[0047] Please refer to Figure 6 、 Figure 7 In the installation box 6, a servo motor 7 is fixedly installed. The output shaft of the servo motor 7 is fixedly installed with a turntable 29. A through groove is formed in the turntable 29. A threaded rod 31 is rotatably connected in the through groove. A slider 32 that slides in the through groove is threadedly connected to the threaded rod 31. A cylinder is fixedly installed on the slider 32. A connecting rod 30 is rotatably connected to the cylinder. The side of the connecting rod 30 away from the cylinder is rotatably connected to the connecting column 28.

[0048] Specifically, when the button in the cylinder 5 is turned on, the servo motor 7 operates. The output shaft of the servo motor 7 drives the turntable 29 to rotate. The rotating turntable 29 drives the fixed slider 32 on it to drive the cylinder to rotate around the central axis of the turntable 29. The rotating cylinder drives the connecting column 28 on one side to move back and forth through the connecting rod 30 rotatably connected to it. When it is necessary to frequently clean the ash at the heated part, less acetylene is required, and the intake of the mixed gas is reduced. Rotate the threaded rod 31, and the rotating threaded rod 31 drives the slider 32 threaded on it to move. The moving slider 32 drives the cylinder to approach or move away from the central axis of the turntable 29.

[0049] A circular hole is formed on one side of the boiler 2. A feed port 3 is fixedly installed on the circular hole. A liquid outlet pipe is fixedly installed on one side of the boiler 2. A liquid inlet pipe is fixedly installed on the boiler 2.

[0050] In detail, liquid is discharged into the boiler 2 through the liquid inlet pipe, and the liquid in the boiler 2 can be discharged through the liquid outlet pipe.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for reducing the heat loss of boiler flue gas, characterized in that, It includes the following steps: Step 1: When the boiler (2) is in operation, fuel needs to be burned, and burning fuel will release waste gas. It is necessary to reduce the heat loss of the boiler (2) during smoke exhaust and utilize it to increase the usage efficiency of the boiler (2). Step 2: When the heat loss of the boiler (2) during smoke exhaust is too large, start the acetylene blasting soot cleaning device on one side. Step 3: The acetylene blasting soot cleaning device mixes acetylene and air, and uses the shock wave generated by the explosion to remove the ash deposited on the heating surface at the tail of the boiler (2). Step 4: When the acetylene blasting soot cleaning device cannot remove the ash on the heating surface at one time, perform multiple removals through the monitoring of the acetylene blasting soot cleaning device. The acetylene blasting soot cleaning device includes a bottom plate (1) arranged below the boiler (2), the boiler (2) is fixedly installed on the bottom plate (1), and a smoke exhaust pipe (4) communicating with its interior is fixedly installed on one side of the boiler (2). A monitoring component is installed at the end of the smoke exhaust pipe (4) away from the boiler (2). An installation box (6) is fixedly installed on one side of the boiler (2). A plurality of support legs are fixedly installed at the bottom of the installation box (6), and the support legs are fixedly installed on the bottom plate (1). A protective cylinder (11) extending into the boiler (2) is fixedly installed in the installation box (6), and an air intake component arranged in the installation box (6) is fixedly installed on one side of the protective cylinder (11). The air intake component includes an air outlet pipe (18) fixed on one side of the protective cylinder (11). Piston cylinders (20) are fixedly installed at both air intake ends of the air outlet pipe (18). An air inlet pipe (10) extending outside the installation box (6) is fixedly installed on one side of the piston cylinder (20). Check valves (19) are fixedly installed on both the air inlet pipe (10) and the air outlet pipe (18). The piston cylinder (20) is fixedly installed with a support column for supporting it, and the support column is fixedly installed in the installation box (6). A piston block is slidably connected in the piston cylinder (20). A piston rod (21) extending outside the piston cylinder (20) is fixedly installed on one side of the piston block. A fixing plate (23) is fixedly installed on the side of the piston rod (21) away from the piston block. A compression spring (22) sleeved on the piston rod (21) is abutted between the fixing plate (23) and the piston cylinder (20). A first pushing plate (26) is arranged in the installation box (6). A plurality of telescopic rods (24) are fixedly installed on one side of the first pushing plate (26). The movable ends of the telescopic rods (24) are abutted against the fixing plate (23) on one side. A threaded hole is opened at the fixed end of the telescopic rod (24), and a threaded knob (25) abutted against the movable end of the telescopic rod (24) is threadedly connected in the threaded hole. A pushing block (27) is fixedly installed on the other side of the first pushing plate (26), and a connecting column (28) is fixedly installed on one side of the pushing block (27).

2. A method for reducing the heat loss of boiler flue gas according to claim 1, characterized in that, The monitoring component includes a support frame (13) fixedly installed on the exhaust pipe (4). A circular hole is provided on the support frame (13), and a liquid storage pipe (12) is fixedly installed in the circular hole. A second push plate is slidably connected in the liquid storage pipe (12), and mercury is filled in the liquid storage pipe (12). A cylinder (5) is fixedly installed on the support frame (13), and a limiting rod (16) is fixedly installed in the cylinder (5). A push rod (15) is fixed on the second push plate, and a sliding block (17) slidably mounted on the limiting rod (16) is fixedly installed at one end of the push rod (15) away from the second push plate. A button is fixedly installed in the cylinder (5).

3. A method for reducing the heat loss of boiler flue gas according to claim 1, characterized in that, A servo motor (7) is fixedly installed in the installation box (6). The output shaft of the servo motor (7) is fixedly installed with a turntable (29). A through chute is provided on the turntable (29), and a threaded rod (31) is rotatably connected in the through chute. A slider (32) slidably mounted in the through chute is threadedly connected to the threaded rod (31). A cylinder is fixedly installed on the slider (32), and a connecting rod (30) is rotatably connected to the cylinder. One side of the connecting rod (30) away from the cylinder is rotatably connected to the connecting column (28).

4. A method for reducing the heat loss of boiler flue gas according to claim 1, characterized in that, A circular hole is provided on one side of the boiler (2), and a feed inlet (3) is fixedly installed on the circular hole. An outlet pipe is fixedly installed on one side of the boiler (2), and an inlet pipe is fixedly installed on the boiler (2).

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