Air distribution, flow equalization and resistance reduction control device for boiler

Abstract

The invention relates to a boiler air distribution flow-equalizing resistance-reducing control device, which belongs to the boiler air distribution technology and comprises a hot air box used for accessing hot air, a cold air box mounted on one side of the hot air box and used for accessing cold air, and a combustion seat arranged in a boiler, a gas pipeline used for supplying gas to a gas nozzle is arranged at the bottom of the combustion base, a plurality of spiral air distribution nozzles are arranged at the top of the combustion base in an annular array mode, a dust blowing disc with air outlet holes in the side face is fixedly arranged at the center of the top of the combustion base, and a plurality of rotary dust blowing nozzles are arranged at the top of the combustion base in an annular array mode. The dust blowing disc and the rotary dust blowing spray head are connected with the guide seat through the dust blowing pipeline, the air distribution spray head is connected with the guide seat through the air distribution pipeline, the combustion-supporting air and fuel gas mixing effect is good, smoke dust can be automatically cleaned, the air distribution effect is good, and the high application value is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler air distribution, and in particular to a boiler air distribution flow equalization and resistance reduction control device. Background Art

[0002] Boiler air distribution refers to the process of controlling the air intake during boiler combustion so that the fuel obtains sufficient oxygen and achieves complete combustion. In the existing boiler air distribution technology, cold air usually enters from one side of the hot air duct. The cold air cuts into the hot air duct vertically, which will cause strong disturbance to the main airflow of the hot air and increase the flow resistance of the main airflow of the hot air. At the same time, the cold and hot air cannot be fully mixed, resulting in uneven cold and hot air.

[0003] In view of the above problems, a Chinese patent with the announcement number CN221602222U discloses a device for reducing resistance of hot and cold air mixed flow at the inlet of a power station boiler coal mill, comprising a hot air pipe, a cold air pipe and an air distribution chamber, wherein the air distribution chamber is mounted on the periphery of the hot air pipe, the cold air pipe is connected to the air distribution chamber, the bottom plate of the air distribution chamber forms an angle with the flow direction of the hot air in the hot air pipe, and at least one window is provided at the adjacent part of the side wall of the hot air pipe and the bottom plate, and the upper edge of the window is not higher than the bottom of the cold air pipe. The traditional 90° cold air intake mode is changed, and the cold air is uniformly introduced into the hot air pipe along the four sides of the hot air pipe through the air distribution chamber, and the entry direction is basically consistent with the hot air flow direction. The jet not only does not disturb the main airflow, but has a suction effect, which greatly reduces the flow resistance of the hot air, and solves the problem that the cold air disturbs the main airflow of the hot air, increases the flow resistance and the corresponding fan power consumption, and the temperature and air volume cannot be accurately measured during the disturbance.

[0004] Although the above-mentioned technical solution realizes uniform mixing of cold and hot air flows by adjusting the mixing angle of cold air and hot air, the exhaust structure of the mixed combustion-supporting air has not been improved. The existing combustion-supporting air exhaust structure is basically simply arranged on one side of the gas nozzle. Although it has a certain combustion-supporting effect, the combustion-supporting air is discharged in a straight line state and mixed with the gas. The mixing effect is not good enough, which may lead to insufficient local gas combustion, and the smoke generated by the gas combustion needs to be manually cleaned regularly, which is not efficient and quick enough. In view of this, the present application is proposed. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides a boiler air distribution flow equalization and resistance reduction control device, which has the advantages of good mixing effect of combustion-supporting air and fuel gas and automatic cleaning of smoke and dust.

[0006] The technical solution adopted by the present invention is: it includes a hot air box for receiving hot air, a cold air box installed on one side of the hot air box for receiving cold air, and a combustion seat arranged inside the boiler, the cold air box is provided with a cooler for water cooling, the inner cavity of the cold air box is connected to the inner cavity of the hot air box, the bottom of the hot air box is connected with a guide seat through a ventilation pipe, an air distribution pipe and a dust blowing pipe are installed on the guide seat, a regulating valve is arranged in the guide seat for controlling the direction of air flow entering after the hot air box is distributed, a plurality of gas nozzles are evenly arranged on the top of the combustion seat, a gas pipeline for supplying gas to the gas nozzle is arranged at the bottom of the combustion seat, when actually used, the gas pipeline is connected to the gas, the gas continuously flows to the gas nozzle through the combustion pipeline, and a flame can be formed on the gas nozzle by turning on the igniter, a plurality of spiral air distribution nozzles are arranged in a ring array on the top of the combustion seat, and a fixed valve is arranged at the center position of the top of the combustion seat The top of the combustion seat is provided with a plurality of rotating dust-blowing nozzles in an annular array, and the dust-blowing disk and the rotating dust-blowing nozzles are connected to the guide seat through the dust-blowing pipe, and the air distribution nozzle is connected to the guide seat through the air distribution pipe. When air distribution is needed, the guide seat controls the airflow to enter the air distribution pipe, and the airflow enters the air distribution nozzle through the air distribution pipe and is discharged. Since the air distribution nozzle is a spiral structure as a whole, the spiral structure gives the airflow angular momentum after the airflow enters, so that it forms a rotating flow in the air distribution nozzle. According to the principle of conservation of angular momentum, the airflow can continue to rotate after leaving the pipe and mix with the fuel gas in a rotating posture. When it is necessary to clean the smoke and dust, the airflow is controlled to enter the dust-blowing pipe through the guide seat, so that the airflow is sprayed out through the dust-blowing disk and the rotating dust-blowing nozzle. The dust-blowing disk can blow the smoke near the middle to the side, and the rotating dust-blowing nozzle can further blow the smoke to the outside in a rotating state, so that the smoke and dust are blown into the dust collecting tank.

[0007] Preferably, the cooler consists of a water supply seat arranged on the outside of the cold air box and a serpentine heat exchange tube arranged in the inner cavity of the cold air box. The water supply seat is provided with a water inlet and a water outlet. The two ports of the heat exchange tube are respectively connected to the water inlet and the water outlet. The constant temperature water source is connected to the heat exchange tube through the water inlet. The temperature of the cold air is guaranteed to be constant after heat exchange with the cold air through the heat exchange tube. The temperature of the cold air is secondary corrected to ensure the temperature of the cold air.

[0008] Preferably, the rotary dust blowing nozzle consists of a rotary joint installed on the top of the combustion seat, a vertical tube fixedly installed on the top of the rotary joint, and a bent tube installed on the top of the vertical tube and extending downward to the side. A conical pressurizing tube is fixedly installed at the end of the bent tube. A side nozzle is also provided on the side wall of the bent tube for providing a lateral driving force to rotate the rotary joint. The airflow enters through the rotary joint, passes through the vertical tube and the bent tube, and is discharged from the pressurizing tube, thereby blowing the smoke and dust below to push the smoke and dust into the dust collecting tank. The side nozzle is arranged on the side to generate a reverse thrust when the airflow is discharged, thereby prompting the rotary joint and the pressurizing tube to rotate.

[0009] Preferably, a dust collecting groove for smoke and dust accumulation is provided on the outer side of the top of the combustion seat, and a dust outlet is provided on one side of the dust collecting groove. A dust exhaust pipe extending to the outside of the combustion seat is installed on the dust outlet. The side of the dust collecting groove has a groove, and the groove is connected to the inner groove of the combustion seat for installing the gas nozzle, the air distribution nozzle and the rotary dust blowing nozzle, so that the smoke and dust blown to the side by the rotary dust blowing nozzle can enter the dust collecting groove through the groove.

[0010] Preferably, a dust collecting piece is installed on the combustion seat, which can push the smoke in the dust collecting trough to the dust outlet, and the dust collecting piece includes a driving motor fixedly installed on the bottom of the combustion seat and a moving block slidably arranged in the dust collecting trough, and a rotating connecting rod is installed on the output shaft of the driving motor, and the top of the rotating connecting rod is connected with a bonding piece through a lower connecting rod, and the top of the bonding piece is fixedly connected to the moving block through an upper connecting rod. The smoke accumulated in the dust collecting trough is centrally processed by the setting of the dust collecting piece. Specifically, the rotating connecting rod is driven to rotate by turning on the driving motor, and then the lower connecting rod, the bonding piece and the upper connecting rod at one end of the rotating connecting rod are driven to move on the outer side of the combustion seat, and the moving block located in the dust collecting trough moves accordingly in the dust collecting trough, so as to push the smoke accumulated in the dust collecting trough to one side.

[0011] Preferably, an ash scooping bucket is provided on one side of the sliding block, and the setting of the ash scooping bucket helps to more fully scoop up and clean the smoke and dust at the bottom of the dust collecting trough, thereby improving the smoke and dust cleaning effect. The side curvature of the bonding sheet is the same as the curvature of the outer wall of the combustion seat.

[0012] Preferably, an upward pipe extending into the hot air box is installed on the air outlet of the cold air box, and a rotating mixing nozzle is installed at one end of the upward pipe located in the hot air box to continuously change the position of the cold air discharged into the hot air box. Through the setting of the rotating mixing nozzle, the cold air can be mixed more evenly with the hot air when discharged into the hot air box.

[0013] Preferably, the rotating mixing nozzle is composed of a hollow fixed seat installed on the upper extension pipe, a rotating ventilation seat connected to the fixed seat through a rotating joint, and an oblique jet pipe fixedly arranged on the outer side of the rotating ventilation seat. The cold air enters through the fixed seat, and then passes through the rotating ventilation seat and is discharged by the oblique jet pipe.

[0014] Preferably, the cold air box is fixedly provided with a plurality of wrapping and insulation parts which can selectively wrap and insulate the heat exchange tube partially, the wrapping and insulation parts include an air pump fixedly mounted on the outer wall of the cold air box, an air pipe fixed on the inner wall of the cold air box, and a hollow fixing plate fixedly arranged at one end of the air pipe, the air pipe is connected to the air pump, a lower wrapping plate is arranged on the fixing plate, the top of the lower wrapping plate is connected to the upper wrapping plate via a telescopic tube, the telescopic tube is connected to the cavity of the fixing plate via a conduit embedded in the lower wrapping plate, and the telescopic tube, the fixing plate and the air pipe are in a connected state.

[0015] Preferably, the air pump is an integrated air pump for extracting and discharging air, which controls the extension and retraction of the telescopic tube and further controls the position between the upper wrapping sheet and the lower wrapping sheet. When the telescopic tube is retracted, the upper wrapping sheet and the lower wrapping sheet come close to each other and can wrap a part of the heat exchange tube, thereby reducing the heat exchange effect.

[0016] The beneficial effects of the present invention are:

[0017] 1. The airflow after air distribution in the present invention enters the air distribution nozzle through the air distribution pipe and is then discharged. The air distribution nozzle is a spiral structure as a whole. After the airflow enters, the spiral structure gives the airflow angular momentum, so that it forms a rotating flow in the air distribution nozzle. The airflow can continue to rotate after leaving the pipe and mix with the fuel gas in a rotating posture, which can be more fully mixed with the fuel gas, ensuring the combustion-supporting effect and ensuring that the fuel gas is fully burned.

[0018] 2. The present invention controls the airflow entering the dust blowing duct through the guide seat, so that the airflow is ejected through the dust blowing plate and the rotating dust blowing nozzle. The dust blowing plate can blow the smoke and dust near the middle to the side, and the rotating dust blowing nozzle can blow the smoke and dust further to the outside in a rotating state, so that the smoke and dust are blown into the dust collecting tank, which is convenient for centralized cleaning.

[0019] 3. The present invention can centrally process the smoke accumulated in the dust collecting trough through the dust collecting piece. The moving block located in the dust collecting trough can move to one side when driven by the driving motor, and push the smoke accumulated in the dust collecting trough to the dust outlet, and then discharge it through the dust exhaust pipe. In actual use, it is only necessary to collect the smoke discharged from the dust exhaust pipe through the container to prevent the smoke from accumulating in the combustion seat and affecting the combustion effect.

[0020] 4. The present invention arranges a rotating mixing nozzle so that the cold air can be mixed with the hot air more evenly when discharged into the hot air box. Compared with the cold air introduction structure in the prior art, the cold air of the present application is mixed with the hot air at an inclined angle, and the cold air discharge port changes continuously, so the mixing effect is better. At the same time, the cold air diffuses from the center to the outside, which can ensure that the central area of ​​the hot air can also be fully mixed, preventing the situation where the hot air in the central area cannot be mixed due to the side air intake.

[0021] 5. The present invention can wrap a part of the heat exchange tube by bringing the upper wrapping sheet and the lower wrapping sheet of the wrapping insulation component close to each other, thereby reducing the heat exchange effect, and providing a technical means for changing the air distribution temperature different from the prior art. The wrapping insulation component of the present invention can provide an adjustment structure with simpler and faster operation, which is convenient for quickly changing the air distribution temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 It is a schematic diagram of the back structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the bottom structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the structure inside the combustion seat of the present invention.

[0026] Figure 5 It is a schematic diagram of the structure of the rotary dust blowing nozzle in the present invention.

[0027] Figure 6 It is a schematic diagram of the structure of the dust collecting member in the present invention.

[0028] Figure 7 It is a schematic diagram of the internal structure of the hot air box in the present invention.

[0029] Figure 8 It is a schematic diagram of the structure of the rotary mixing nozzle in the present invention.

[0030] Fig. 9 It is a schematic diagram of the internal structure of the cooling air box in the present invention.

[0031] Fig.10 It is a schematic diagram of the structure of the thermal insulation package in the present invention.

[0032] Explanation of the reference numerals: In the figure: 1, hot air box; 2, cold air box; 3, cooler; 31, water supply seat; 32, heat exchange tube; 4, combustion seat; 5, dust collecting tank; 6, dust outlet; 7, dust exhaust pipe; 8, dust collecting member; 81, driving motor; 82, rotating connecting rod; 83, lower connecting rod; 84, bonding sheet; 85, upper connecting rod; 86, moving block; 87, ash shovel; 9, guide seat; 10, gas pipeline; 11, air distribution pipeline; 12, dust blowing pipeline; 13, gas nozzle; 14, air distribution nozzle; 15. Rotating dust-blowing nozzle; 151. Rotating joint; 152. Vertical pipe; 153. Bending pipe; 154. Pressurizing pipe; 155. Side nozzle; 16. Dust-blowing plate; 17. Ventilation duct; 18. Upward extension duct; 19. Rotating mixing nozzle; 191. Fixed seat; 912. Rotating ventilation seat; 193. Oblique jet pipe; 20. Wrapping insulation; 201. Air pump; 202. Inflating pipe; 203. Fixed plate; 204. Lower wrapping plate; 205. Upper wrapping plate; 206. Telescopic tube. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Example 1

[0035] like Figure 1-Figure 5As shown, this embodiment provides a boiler air distribution flow equalization and resistance reduction control device, including a hot air box 1 for receiving hot air, a cold air box 2 installed on one side of the hot air box 1 for receiving cold air, and a combustion seat 4 arranged inside the boiler, a water-cooled cooler 3 is arranged in the cold air box 2, and the inner cavity of the cold air box 2 is connected with the inner cavity of the hot air box 1. In actual use, the hot air source is introduced into the hot air box 1, and the cold air is introduced into the cold air box 2. Constant temperature liquid is continuously introduced into the cooler 3 to correct the temperature of the cold air to ensure that the temperature of the cold air is constant. The mixed hot and cold air is introduced into the combustion seat 4, and the gas is discharged in combination to realize the basic boiler air distribution function. The bottom of the hot air box 1 is passed through A guide seat 9 is connected to the ventilation duct 17, and an air distribution duct 11 and a dust blowing duct 12 are installed on the guide seat 9. A regulating valve is arranged in the guide seat 9 to control the flow direction of the airflow entering the hot air box 1 after air distribution. A plurality of gas nozzles 13 are evenly arranged on the top of the combustion seat 4, and a gas pipeline 10 for supplying gas to the gas nozzle 13 is arranged at the bottom of the combustion seat 4. When actually used, the gas pipeline 10 is connected to the gas, and the gas continuously flows to the gas nozzle 13 through the combustion pipeline. By turning on the igniter, a flame can be formed on the gas nozzle 13. A plurality of spiral air distribution nozzles 14 are arranged in a circular array on the top of the combustion seat 4, and a fixed gas nozzle 13 is arranged at the center of the top of the combustion seat 4. A dust blowing plate 16 with air outlet holes on the side is fixedly provided, and a plurality of rotating dust blowing nozzles 15 are provided in a circular array on the top of the combustion seat 4. The dust blowing plate 16 and the rotating dust blowing nozzles 15 are connected to the guide seat 9 through the dust blowing pipe 12, and the air distribution nozzle 14 is connected to the guide seat 9 through the air distribution pipe 11. In actual use, when air distribution is required, the guide seat 9 controls the airflow to enter the air distribution pipe 11, and the airflow enters the air distribution nozzle 14 through the air distribution pipe 11 and is then discharged. Since the air distribution nozzle 14 is a spiral structure as a whole, the spiral structure gives the airflow angular momentum after the airflow enters, so that it forms a rotating flow in the air distribution nozzle 14. According to the principle of conservation of angular momentum, the airflow leaves the pipe. After that, it can continue to rotate and mix with the gas in a rotating posture. Compared with the method of mixing by linearly impacting the gas in the prior art, it can be more fully mixed with the gas to ensure the combustion-supporting effect and ensure that the gas is fully burned. In addition, after a period of use, smoke and dust may accumulate on the combustion seat 4. At this time, the guide seat 9 can be used to control the airflow to enter the dust blowing pipe 12, so that the airflow is ejected through the dust blowing plate 16 and the rotating dust blowing nozzle 15. The dust blowing plate 16 can blow the smoke and dust near the middle to the side, and the rotating dust blowing nozzle 15 can blow the smoke and dust further to the outside in a rotating state, so that the smoke and dust are blown into the dust collecting tank 5, which is convenient for centralized cleaning.

[0036] The cooler 3 is composed of a water supply seat 31 arranged on the outside of the cold air box 2 and a serpentine heat exchange tube 32 arranged in the inner cavity of the cold air box 2. A water inlet and a water outlet are arranged on the water supply seat 31. The two ports of the heat exchange tube 32 are respectively connected to the water inlet and the water outlet. In actual use, the constant temperature water source is connected to the heat exchange tube 32 through the water inlet. After the heat exchange tube 32 exchanges heat with the cold air, the temperature of the cold air is guaranteed to be constant. The temperature of the cold air is secondary corrected to ensure the temperature of the cold air. The water after heat exchange returns to the water source through the water outlet for constant temperature treatment, and the cycle is repeated to achieve continuous cooling.

[0037] The rotary dust blowing nozzle 15 consists of a rotary joint 151 installed on the top of the combustion seat 4, a vertical pipe 152 fixedly installed on the top of the rotary joint 151, and a bent pipe 153 installed on the top of the vertical pipe 152 and extending to the side and downward. A conical pressurizing pipe 154 is fixedly installed at the end of the bent pipe 153, and a side nozzle 155 is also provided on the side wall of the bent pipe 153 for providing a lateral driving force to rotate the rotary joint 151. The airflow enters through the rotary joint 151, passes through the vertical pipe 152 and the bent pipe 153, and is discharged from the pressurizing pipe 154, thereby blowing the smoke below to push the smoke into the dust collecting tank 5. The side nozzle 155 is set on the side to generate a reverse thrust when the airflow is discharged, thereby prompting the rotary joint 151 and the pressurizing pipe 154 to rotate, so that the pressurizing pipe 154 can blow the smoke while rotating, ensuring that the smoke can be fully blown into the dust collecting tank 5.

[0038] A dust collecting groove 5 for smoke accumulation is provided on the outer side of the top of the combustion seat 4, and a dust outlet 6 is provided on one side of the dust collecting groove 5. A dust exhaust pipe 7 extending to the outside of the combustion seat 4 is installed on the dust outlet 6. The side of the dust collecting groove 5 has a groove, which is connected to the inner groove of the combustion seat 4 for installing the gas nozzle 13, the air distribution nozzle 14 and the rotary dust blowing nozzle 15, so that the smoke blown to the side by the rotary dust blowing nozzle 15 can enter the dust collecting groove 5 through the groove, which is convenient for centralized cleaning.

[0039] Example 2

[0040] like Figure 6As shown, this embodiment adds a structure that can efficiently clean the smoke accumulated in the dust collecting trough 5 on the basis of Embodiment 1. Specifically, a dust collecting piece 8 that can push the smoke in the dust collecting trough 5 to the dust outlet 6 is installed on the combustion seat 4. The dust collecting piece 8 includes a driving motor 81 fixedly installed at the bottom of the combustion seat 4 and a moving block 86 slidably arranged in the dust collecting trough 5. A rotating connecting rod 82 is installed on the output shaft of the driving motor 81. The top of the rotating connecting rod 82 is connected to a bonding piece 84 through a lower connecting rod 83. The top of the bonding piece 84 is fixedly connected to the moving block 86 through an upper connecting rod 85. The smoke accumulated in the dust collecting trough 5 is centrally processed through the setting of the dust collecting piece 8. Specifically, the rotating connecting rod 82 is driven to rotate by turning on the driving motor 81, thereby driving the lower connecting rod 83, the bonding piece 84 and the upper connecting rod 85 at one end of the rotating connecting rod 82. The rod 85 moves on the outer side of the combustion seat 4, and the moving block 86 located in the dust collecting groove 5 moves accordingly in the dust collecting groove 5, so that the smoke accumulated in the dust collecting groove 5 can be pushed to one side, and the smoke can be pushed into the dust outlet 6, and then discharged through the dust exhaust pipe 7. In actual use, it is only necessary to collect the smoke discharged from the dust exhaust pipe 7 through a container to prevent the smoke from accumulating in the combustion seat 4 and affecting the combustion effect. A shovel hopper 87 is provided on one side of the sliding block. The setting of the shovel hopper 87 helps to more fully shovel and clean the smoke at the bottom of the dust collecting groove 5, thereby improving the smoke cleaning effect. The side curvature of the bonding sheet 84 is the same as the curvature of the outer wall of the combustion seat 4. In actual application, a connecting structure with the bonding sheet 84, such as a slide rail, can be added to the outer wall of the combustion seat 4, which can reduce the shaft load of the drive motor 81 to a certain extent and prevent the motor shaft from being damaged by excessive load.

[0041] Example 3

[0042] like Figure 7 and Figure 8As shown, this embodiment improves the mixing structure of the cold air box 2 entering the hot air box 1 on the basis of embodiment 1. Specifically, an upward extension pipe 18 extending into the hot air box 1 is installed on the air outlet of the cold air box 2, and a rotating mixing nozzle 19 is installed at one end of the upper extension pipe 18 located in the hot air box 1, so that the position of the cold air discharged into the hot air box 1 is continuously changed. Through the setting of the rotating mixing nozzle 19, the cold air is more evenly mixed with the hot air when discharged into the hot air box 1. Compared with the cold air introduction structure of the prior art, the cold air of this application is mixed with the hot air at an inclined angle, and the cold air discharge port is continuously changed, so that the mixing effect is better. At the same time, the cold air diffuses from the center to the outside, which can ensure that the central area of ​​the hot air can also be fully mixed. In order to prevent the situation where the hot air in the center area cannot be mixed due to the side air intake, the rotating mixing nozzle 19 is composed of a hollow fixed seat 191 installed on the upper extension pipe 18, a rotating ventilation seat 192 connected to the fixed seat 191 through a rotating joint, and an oblique jet pipe 193 fixedly arranged on the outer side of the rotating ventilation seat 192. The cold air enters through the fixed seat 191, and then passes through the rotating ventilation seat 192 and is discharged by the oblique jet pipe 193. The oblique jet pipe 193 is not only inclined in the longitudinal direction, but also in the transverse direction, so that a certain reverse thrust can be generated when the cold air is discharged, thereby prompting the rotating ventilation seat 192 to rotate, so as to realize the continuous change of the cold air discharge port, which is conducive to a more uniform mixing of the cold and hot air.

[0043] Example 4

[0044] like Fig. 9 and Fig.10As shown, this embodiment adds a structure for changing the temperature of cold air on the basis of embodiment 1, specifically, a plurality of wrapping insulation parts 20 are fixedly arranged in the cold air box 2, which can selectively wrap and insulate the heat exchange tube 32 locally, and the wrapping insulation parts 20 include an air pump 201 fixedly installed on the outer wall of the cold air box 2, an air tube 202 fixed on the inner wall of the cold air box 2, and a hollow fixing plate 203 fixedly arranged at one end of the air tube 202, the air tube 202 is connected to the air pump 201, and a lower wrapping plate 204 is arranged on the fixing plate 203, and the top of the lower wrapping plate 204 is connected to the upper wrapping plate 205 through a telescopic tube 206, and the telescopic tube 206 is connected to the cavity of the fixing plate 203 through a conduit embedded in the lower wrapping plate 204, and the telescopic tube 206, the fixing plate 203 and the air tube 202 are in a connected state, and the air pump 201 is an integrated air extraction and exhausting pump, and the expansion and contraction of the telescopic tube 206 is controlled by the air pump 201, thereby controlling The position between the upper wrapping sheet 205 and the lower wrapping sheet 204 is made. When the telescopic tube 206 is retracted, the upper wrapping sheet 205 and the lower wrapping sheet 204 are close to each other and can wrap a part of the heat exchange tube 32, thereby reducing the heat exchange effect. In actual use, the cold air source can directly introduce room temperature gas without the need to use cold air preparation equipment. The heat exchange tube 32 can be introduced with a coolant at a lower temperature to achieve the cold air generation effect. When the upper wrapping sheet 205 and the lower wrapping sheet 204 are close to each other, the heat exchange efficiency of the heat exchange tube 32 can be reduced to increase the temperature of the cold air. This design aims to provide a technical means for changing the air distribution temperature that is different from the prior art. In the prior art, in order to change the air distribution temperature, only the flow rate of cold air or hot air can be adjusted. The existing adjustment method requires changing the source equipment of the hot air or cold air from the source, which is relatively cumbersome. The wrapping insulation component 20 of the present invention can provide an adjustment structure that is simpler and faster to operate, thereby facilitating the rapid change of the air distribution temperature.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A boiler air distribution flow equalization and resistance reduction control device, comprising a hot air box (1) for receiving hot air, a cold air box (2) installed on one side of the hot air box (1) for receiving cold air, and a combustion seat (4) arranged inside the boiler, wherein a water-cooled cooler (3) is arranged inside the cold air box (2), and the inner cavity of the cold air box (2) is connected to the inner cavity of the hot air box (1), characterized in that: The bottom of the hot air box (1) is connected to a guide seat (9) via a ventilation duct (17); an air distribution duct (11) and a dust blowing duct (12) are installed on the guide seat (9); a plurality of gas nozzles (13) are evenly arranged on the top of the combustion seat (4); a gas pipeline (10) for supplying gas to the gas nozzles (13) is arranged at the bottom of the combustion seat (4); a plurality of spiral air distribution nozzles (14) are arranged in an annular array on the top of the combustion seat (4); a dust blowing disk (16) having air outlet holes on the side is fixedly arranged at the center position of the top of the combustion seat (4); a plurality of rotating dust blowing nozzles (15) are arranged in an annular array on the top of the combustion seat (4); the dust blowing disk (16) and the rotating dust blowing nozzle (15) are both connected to the guide seat (9) via the dust blowing duct (12); and the air distribution nozzle (14) is connected to the guide seat (9) via the air distribution duct (11).

2. The boiler air distribution flow equalization and resistance reduction control device according to claim 1 is characterized in that: The cooler (3) is composed of a water supply seat (31) arranged outside the cold air box (2) and a serpentine heat exchange tube (32) arranged in the inner cavity of the cold air box (2); a water inlet and a water outlet are arranged on the water supply seat (31); two ports of the heat exchange tube (32) are respectively connected to the water inlet and the water outlet.

3. The boiler air distribution flow equalization and resistance reduction control device according to claim 1 is characterized in that: The rotary dust blowing nozzle (15) comprises a rotary joint (151) mounted on the top of the combustion seat (4), a vertical pipe (152) fixedly mounted on the top of the rotary joint (151), and a bent pipe (153) mounted on the top of the vertical pipe (152) and extending downward to the side, wherein a conical pressure pipe (154) is fixedly mounted at the end of the bent pipe (153), and a side nozzle (155) is also mounted on the side wall of the bent pipe (153) for providing a lateral driving force to rotate the rotary joint (151).

4. The boiler air distribution flow equalization and resistance reduction control device according to claim 1 is characterized in that: A dust collecting groove (5) for dust accumulation is provided on the outer side of the top of the combustion seat (4), a dust outlet (6) is provided on one side of the dust collecting groove (5), and a dust exhaust pipe (7) extending to the outside of the combustion seat (4) is installed on the dust outlet (6).

5. The boiler air distribution flow equalization and resistance reduction control device according to claim 4 is characterized in that: The combustion seat (4) is provided with a dust collecting member (8) capable of pushing the smoke in the dust collecting groove (5) into the dust outlet (6); the dust collecting member (8) comprises a driving motor (81) fixedly mounted on the bottom of the combustion seat (4) and a moving block (86) slidably arranged in the dust collecting groove (5); a rotating connecting rod (82) is mounted on the output shaft of the driving motor (81); the top of the rotating connecting rod (82) is connected to a bonding sheet (84) via a lower connecting rod (83); the top of the bonding sheet (84) is fixedly connected to the moving block (86) via an upper connecting rod (85).

6. The boiler air distribution flow equalization and resistance reduction control device according to claim 5 is characterized in that: An ash shovel (87) is provided on one side of the sliding block, and the curvature of the side surface of the fitting sheet (84) is the same as the curvature of the outer wall of the combustion seat (4).

7. The boiler air distribution flow equalization and resistance reduction control device according to claim 1 is characterized in that: An upward pipe (18) extending into the hot air box (1) is installed on the air outlet of the cold air box (2); a rotating mixing nozzle (19) is installed at one end of the upward pipe (18) located inside the hot air box (1), so that the position where the cold air is discharged into the hot air box (1) continuously changes.

8. The boiler air distribution flow equalization and resistance reduction control device according to claim 7 is characterized in that: The rotary mixing nozzle (19) is composed of a hollow fixed seat (191) mounted on the upward extension pipe (18), a rotary ventilation seat (192) connected to the fixed seat (191) via a rotary joint, and an oblique air injection pipe (193) fixedly arranged on the outer side of the rotary ventilation seat (192).

9. The boiler air distribution flow equalization and resistance reduction control device according to claim 2, characterized in that: A plurality of wrapping and insulating components (20) are fixedly arranged in the cold air box (2) for selectively wrapping and insulating the heat exchange tube (32) locally. The wrapping and insulating components (20) include an air pump (201) fixedly mounted on the outer wall of the cold air box (2), an air pipe (202) fixedly mounted on the inner wall of the cold air box (2), and a hollow fixing plate (203) fixedly arranged at one end of the air pipe (202). The air pipe (202) is connected to the air pump (201). A lower wrapping plate (204) is arranged on the fixing plate (203). The top of the lower wrapping plate (204) is connected to an upper wrapping plate (205) via a telescopic tube (206). The telescopic tube (206) is connected to the cavity of the fixing plate (203) via a conduit embedded in the lower wrapping plate (204).

10. The boiler air distribution flow equalization and resistance reduction control device according to claim 9, characterized in that: The inflation pump (201) is an integrated pump for pumping and releasing air.

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