Steam-injection boiler heating pipeline cleaning, descaling and repairing equipment and method

Abstract

The invention discloses steam-injection boiler heating pipeline cleaning, descaling and repairing equipment and method, the equipment comprises an executing mechanism, an air compressor, an air storage tank, a differential pressure cyclone generator, a sand water supply mechanism and a sand water recycling box, and the executing mechanism comprises a porous spraying pipe, a supporting and guiding outer sleeve, a single-hole spraying pipe and a pipe body posture adjusting and positioning assembly. According to the method, a differential pressure cyclone sand blasting cleaning descaling method is adopted, compressed air serves as power, fine steel sand wrapped by differential pressure cyclone serves as a grinding material to remove scales on the inner wall of the heating pipeline, then clean water is used for cleaning the inner wall of the heating pipeline subjected to descaling, and the purpose of repairing the heating pipeline of the steam-injection boiler is achieved; by adjusting the pressure of the compressed air and the model and size of the refined corundum, the device is not influenced and limited by the turning diameter change of the pipeline, and the device can meet the cleaning, descaling and repairing requirements of pipelines with different pipe diameters, different lengths and different turning directions; and meanwhile, the method has the characteristics of simplicity in operation, environmental protection, energy conservation, small damage to the inner wall of the pipeline, high safety and high cleaning, descaling and repairing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of pipeline cleaning technology, and in particular relates to a cleaning, descaling and repair equipment and method for heating pipelines of steam injection boilers. Background Technology

[0002] Steam injection boilers are crucial equipment in heavy oil production in oilfields. The water used in these boilers is either groundwater or recycled water. Due to the high hardness of groundwater and the high impurity and poor quality of recycled water, scale and rust will accumulate on the inner surface of the heating pipes after a period of operation. This gradually leads to aging and blockage of the heating pipes, seriously affecting the safe operation of the steam injection boiler. Therefore, steam injection boilers require a well-planned production schedule to regularly conduct health checks on the heating pipes. When health problems are detected, targeted overhauls and repairs must be carried out according to plan, including cleaning and descaling of the heating pipes.

[0003] Currently, the main methods for cleaning and descaling heating pipes in steam injection boilers include chemical cleaning, ultrasonic cleaning, ball cleaning, and high-pressure water cleaning. Chemical cleaning poses risks of environmental pollution and causes significant thinning and damage to the inner surface of the pipe. Ultrasonic cleaning is often incomplete, and large pieces of scale can easily cause blockages. Ball cleaning causes significant damage to the inner pipe wall, reducing its pressure resistance, and its adaptability to pipe bends and diameter changes is extremely poor. High-pressure water cleaning can only remove loosely bonded scale from the pipe surface, failing to remove denser, more firmly bonded scale, resulting in poor cleaning and descaling effects. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a cleaning, descaling, and repair equipment and method for heating pipes in steam injection boilers. It employs a differential pressure cyclone sandblasting cleaning and descaling method, using compressed air as power. The fine steel abrasive carried by the differential pressure cyclone acts as the abrasive to remove scale buildup on the inner wall of the heating pipes. Clean water is then used to rinse the descaled inner wall of the heating pipes, achieving the purpose of repairing the heating pipes in steam injection boilers. By adjusting the pressure of the compressed air, the type and size of the fine steel abrasive, and without being affected or limited by pipe bends or diameter changes, it can adapt to the cleaning, descaling, and repair needs of pipes with different diameters, lengths, and bend directions. It also features simple operation, environmental friendliness and energy saving, minimal damage to the inner wall of the pipes, high safety, and high efficiency in cleaning, descaling, and repair operations.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cleaning, descaling, and repair equipment for heating pipes of a steam injection boiler, comprising an actuator, an air compressor, an air storage tank, a differential pressure cyclone generator, a sand and water supply mechanism, and a sand and water recovery tank; the air outlet of the air compressor is connected to the air inlet of the air storage tank, the air outlet of the air storage tank is connected to the air inlet of the differential pressure cyclone generator, the air outlet of the differential pressure cyclone generator is connected to the air inlet of the sand and water supply mechanism, and the air-material mixing outlet of the sand and water supply mechanism is connected to the air-material mixing inlet of the actuator; the actuator is assembled with the upper maintenance pipe of the steam injection boiler; the air-material mixing inlet of the sand and water recovery tank is connected to the lower maintenance pipe of the steam injection boiler.

[0006] The actuator includes a multi-hole spray pipe, a supporting guide outer sleeve, a single-hole spray pipe, and a pipe body adjustment and positioning assembly. The multi-hole spray pipe has several external nozzles evenly spaced along a straight line, with the spacing between the nozzles matching the spacing of the heating pipes in the steam injection boiler. The supporting guide outer sleeve is coaxially and fixedly connected to the multi-hole spray pipe via a pipe joint. The single-hole spray pipe is coaxially inserted inside the supporting guide outer sleeve and the multi-hole spray pipe, with its outer opening extending beyond the outer opening of the supporting guide outer sleeve. The single-hole spray pipe is positioned relative to the supporting guide outer sleeve and the multi-hole spray pipe... The feed tube has axial sliding freedom, and a positioning locking nut is provided between the outer opening of the supporting guide sleeve and the single-hole feed tube; a sealing plug is fixedly installed at the inner opening of the single-hole feed tube, and a sealing sleeve is fixedly installed on the tube body of the single-hole feed tube adjacent to the sealing plug; an inner feed port is provided on the tube body of the single-hole feed tube between the sealing sleeve and the sealing plug; the sealing sleeve and the sealing plug slide in contact with the inner surface of the multi-hole feed tube; the tube body attitude adjustment and positioning assembly is located between the supporting guide sleeve and the opening of the maintenance tube on the steam injection boiler.

[0007] The outer opening of the single-hole spray pipe serves as the gas-material mixing inlet of the actuator, and the outer nozzle of the multi-hole spray pipe serves as the gas-material mixing outlet of the actuator.

[0008] The number of the supporting guide outer sleeve is two, and the two supporting guide outer sleeves are distributed symmetrically at both ends of the porous spray pipe.

[0009] The number of single-hole spray tubes is two, and the two single-hole spray tubes are distributed symmetrically in mirror image on the inner side of the supporting guide outer tube and the multi-hole spray tube.

[0010] A first control valve is installed on the pipeline between the outer opening of the first single-hole spray pipe and the air-material mixing outlet of the sand-water supply mechanism; a second control valve is installed on the pipeline between the outer opening of the second single-hole spray pipe and the air-material mixing outlet of the sand-water supply mechanism.

[0011] The number of the tube body adjustment and positioning components is two sets. The two sets of tube body adjustment and positioning components are respectively installed at the two ends of the inspection tube on the steam injection boiler, and the two sets of tube body adjustment and positioning components are distributed in a mirror symmetrical manner.

[0012] The tube body adjustment and positioning assembly includes a bottom sleeve adapter, an end sleeve adapter, an end cap, a tube body lifting and adjusting bolt, a tube body positioning and clamping bolt, a first pressure-bearing gasket, and a second pressure-bearing gasket. The bottom sleeve adapter is coaxially fixed to the inlet of the maintenance tube on the steam injection boiler. The end sleeve adapter is coaxially fixed to the bottom sleeve adapter. The end cap is fixedly installed on the end sleeve adapter. The tube body lifting and adjusting bolt is vertically screwed to the bottom of the end sleeve adapter. The tube body positioning and clamping bolt is vertically screwed to the top of the end sleeve adapter. A lifting guide hole is provided on the end cap, and the supporting guide outer sleeve passes through the lifting guide hole. The first pressure-bearing gasket is located between the supporting guide outer sleeve and the tube body lifting and adjusting bolt. The second pressure-bearing gasket is located between the supporting guide outer sleeve and the tube body positioning and clamping bolt.

[0013] A method for cleaning, descaling, and repairing heating pipes in a steam injection boiler, using the aforementioned equipment, includes the following steps: Step 1: Complete the matching installation of the actuator on the maintenance pipe of the steam injection boiler, adjust the first control valve to the open state, and adjust the second control valve to the closed state; Step 2: Adjust the axial position of the support guide sleeve and the multi-hole spray pipe so that the multi-hole spray pipe moves inside the inspection pipe of the steam injection boiler to the side closer to the first control valve, until the outermost nozzle of the multi-hole spray pipe is aligned with the outermost pipe opening of the steam injection boiler heating pipe. Step 3: Tighten the pipe body lifting adjustment bolt to lower the height of the support guide outer sleeve and the multi-hole spray pipe until the outer spray nozzle on the multi-hole spray pipe is connected to the pipe opening on the steam injection boiler heating pipe, thus realizing the conductive connection between the multi-hole spray pipe and the steam injection boiler heating pipe. Step 4: Tighten the pipe body positioning and clamping bolts to clamp and position the support guide outer sleeve and the multi-hole spray pipe above the steam injection boiler heating pipe; Step 5: Adjust the axial position of the single-hole spray tube within the support guide sleeve and the multi-hole spray tube so that the inner spray nozzle on the single-hole spray tube is aligned with one of the outer spray nozzles. Step 6: Tighten the positioning lock nut to lock and fix the single-hole spray pipe onto the support guide sleeve; Step 7: Start the air compressor, air tank and differential pressure cyclone generator in sequence to generate differential pressure cyclone in the pipeline; Step 8: Start the sand and water supply mechanism to put fine steel sand abrasive into the pipeline. The fine steel sand abrasive is directly carried by the differential pressure cyclone and enters the single-hole spray pipe. Then, it enters the heating pipe of the steam injection boiler through the inner spray port and the outer spray nozzle in sequence. The spiral-moving fine steel sand abrasive removes the scale on the inner wall of the heating pipe of the steam injection boiler. Then, the fine steel sand abrasive and the removed scale enter the sand and water recovery tank through the lower maintenance pipe of the steam injection boiler. Step 9: Loosen the positioning lock nut to release the locking fixation of the single-hole spray pipe on the support guide sleeve; Step 10: Adjust the axial position of the single-hole spray tube within the support guide sleeve and the multi-hole spray tube so that the inner nozzle on the single-hole spray tube is aligned with the next outer nozzle. Step 11: Repeat steps 6 to 10 until the scale removal work on the inner wall of the remaining steam injection boiler heating pipes is completed; Step 12: Tighten the pipe body lifting adjustment bolt to raise the height of the support guide outer sleeve and the multi-hole spray pipe until the outer spray nozzle on the multi-hole spray pipe is disengaged from the pipe opening on the steam injection boiler heating pipe. Step 13: Adjust the second control valve to the open position and the first control valve to the closed position; Step Fourteen: Adjust the axial position of the support guide sleeve and the multi-hole spray pipe so that the multi-hole spray pipe moves inside the inspection pipe on the steam injection boiler to the side closer to the second control valve, until the outermost nozzle of the multi-hole spray pipe is aligned with the outermost pipe opening on the heating pipe of the steam injection boiler. Step 15: Repeat steps 3 to 11 until all scale removal work on the inner walls of the steam injection boiler heating pipes is completed; Step sixteen: Repeat all the steps of the scale removal operation, except that the abrasive steel grit put into the pipeline is replaced with clean water. The clean water is directly carried by the differential pressure cyclone and cleans the scale on the inner wall of the steam injection boiler heating pipe through the spiral movement of the clean water until the cleaning operation is completed. The repair work of the steam injection boiler heating pipe is then completed.

[0014] The beneficial effects of this invention are: The equipment and method for cleaning, descaling, and repairing heating pipes of steam injection boilers of this invention employs a differential pressure cyclone sandblasting cleaning and descaling method. Compressed air is used as power, and the high-precision steel abrasive carried by the differential pressure cyclone acts as an abrasive to remove scale buildup on the inner wall of the heating pipe. Clean water is then used to rinse the inner wall of the descaled heating pipe, achieving the purpose of repairing the heating pipes of the steam injection boiler. By adjusting the pressure of the compressed air, the type and size of the high-precision steel abrasive, and without being affected or limited by pipe bends or diameter changes, it can adapt to the cleaning, descaling, and repair needs of pipes with different diameters, lengths, and bend directions. It also features simple operation, environmental friendliness and energy saving, minimal damage to the inner wall of the pipe, high safety, and high efficiency in cleaning, descaling, and repair operations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a steam injection boiler heating pipe cleaning, descaling and repair equipment according to the present invention; Figure 2 This is a cross-sectional structural schematic diagram of a steam injection boiler heating pipe cleaning, descaling and repair equipment (air compressor, air tank, differential pressure cyclone generator, sand and water supply mechanism and sand and water recovery tank not shown) according to the present invention. Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 BB section view; Figure 5 for Figure 2 Enlarged view of the middle section (I); Figure 6 for Figure 2 Enlarged view of Part II; In the diagram, 1—Actuator, 2—Air compressor, 3—Air tank, 4—Differential pressure cyclone generator, 5—Sand and water supply mechanism, 6—Sand and water recovery tank, 7—Upper maintenance pipe of steam injection boiler, 8—Lower maintenance pipe of steam injection boiler, 9—Multi-hole spray pipe, 10—Support guide outer sleeve, 11—Single-hole spray pipe, 12—External spray nozzle, 13—Heating pipe of steam injection boiler, 14—Pipe joint, 15—Positioning lock nut, 16—Sealing plug, 17—Sealing sleeve, 18—Inner spray port, 19—First control valve, 20—Second control valve, 21—Bottom sleeve adapter, 22—End sleeve adapter, 23—End cover, 24—Pipe body lifting adjustment bolt, 25—Pipe body positioning clamping bolt, 26—First pressure bearing gasket, 27—Second pressure bearing gasket, 28—Lifting guide hole. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 1-6 As shown, a cleaning, descaling, and repair equipment for heating pipes of a steam injection boiler includes an actuator 1, an air compressor 2, an air storage tank 3, a differential pressure cyclone generator 4, a sand and water supply mechanism 5, and a sand and water recovery tank 6. The air outlet of the air compressor 2 is connected to the air inlet of the air storage tank 3, the air outlet of the air storage tank 3 is connected to the air inlet of the differential pressure cyclone generator 4, the air outlet of the differential pressure cyclone generator 4 is connected to the air inlet of the sand and water supply mechanism 5, and the air-material mixing outlet of the sand and water supply mechanism 5 is connected to the air-material mixing inlet of the actuator 1. The actuator 1 is assembled with the upper maintenance pipe 7 of the steam injection boiler. The air-material mixing inlet of the sand and water recovery tank 6 is connected to the lower maintenance pipe 8 of the steam injection boiler.

[0018] The actuator 1 includes a multi-hole spray pipe 9, a support and guide outer sleeve 10, a single-hole spray pipe 11, and a pipe body adjustment and positioning assembly. The multi-hole spray pipe 9 has several external spray nozzles 12 evenly distributed along a straight line on its body, with the spacing of the external spray nozzles 12 being the same as the spacing of the steam injection boiler heating pipes 13. The support and guide outer sleeve 10 is coaxially and fixedly connected to the multi-hole spray pipe 9 via a pipe joint 14. The single-hole spray pipe 11 is coaxially inserted inside the support and guide outer sleeve 10 and the multi-hole spray pipe 9, with its outer opening extending beyond the outer opening of the support and guide outer sleeve 10. The single-hole spray pipe 11 is positioned relative to the support and guide outer sleeve 10 and the multi-hole spray pipe 9. The tube 9 has axial sliding freedom. A positioning locking nut 15 is provided between the outer opening of the supporting guide sleeve 10 and the single-hole spray pipe 11. A sealing plug 16 is fixedly installed at the inner opening of the single-hole spray pipe 11. A sealing sleeve 17 is fixedly installed on the tube body of the single-hole spray pipe 11 adjacent to the sealing plug 16. An inner spray port 18 is provided on the tube body of the single-hole spray pipe 11 between the sealing sleeve 17 and the sealing plug 16. The sealing sleeve 17 and the sealing plug 16 slide in contact with the inner surface of the tube body of the multi-hole spray pipe 9. The tube body attitude adjustment and positioning assembly is provided between the supporting guide sleeve 10 and the opening of the maintenance tube 7 on the steam injection boiler.

[0019] The outer port of the single-hole spray pipe 11 serves as the air-material mixing inlet of the actuator 1, and the outer nozzle 12 of the multi-hole spray pipe 9 serves as the air-material mixing outlet of the actuator 1.

[0020] The number of the supporting guide outer sleeves 10 is two, and the two supporting guide outer sleeves 10 are distributed symmetrically at both ends of the porous spray pipe 9.

[0021] The number of single-hole spray tubes 11 is two, and the two single-hole spray tubes 11 are mirror-symmetrically distributed inside the supporting guide outer sleeve 10 and the multi-hole spray tube 9.

[0022] A first control valve 19 is installed on the pipeline between the outer opening of the first single-hole spray pipe 11 and the air-material mixing outlet of the sand-water supply mechanism 5; a second control valve 20 is installed on the pipeline between the outer opening of the second single-hole spray pipe 11 and the air-material mixing outlet of the sand-water supply mechanism 5.

[0023] The number of the tube body adjustment and positioning components is two sets. The two sets of tube body adjustment and positioning components are respectively installed at the two ends of the inspection tube 7 on the steam injection boiler, and the two sets of tube body adjustment and positioning components are distributed in a mirror symmetrical manner.

[0024] The tube body adjustment and positioning assembly includes a bottom sleeve adapter 21, an end sleeve adapter 22, an end cap 23, a tube body lifting and adjusting bolt 24, a tube body positioning and clamping bolt 25, a first pressure-bearing gasket 26, and a second pressure-bearing gasket 27. The bottom sleeve adapter 21 is coaxially fixed to the inlet of the inspection tube 7 on the steam injection boiler. The end sleeve adapter 22 is coaxially fixed to the bottom sleeve adapter 21. The end cap 23 is fixedly installed on the end sleeve adapter 22. The tube body lifting and adjusting bolt 24... 24 is vertically screwed to the bottom of the end sleeve adapter 22; the tube body positioning and clamping bolt 25 is vertically screwed to the top of the end sleeve adapter 22; a lifting guide hole 28 is provided on the end cover 23, and the supporting guide outer tube 10 passes through the lifting guide hole 28; the first pressure-bearing gasket 26 is located between the supporting guide outer tube 10 and the tube body lifting adjustment bolt 24; the second pressure-bearing gasket 27 is located between the supporting guide outer tube 10 and the tube body positioning and clamping bolt 25.

[0025] A method for cleaning, descaling, and repairing heating pipes in a steam injection boiler, using the aforementioned equipment, includes the following steps: Step 1: Complete the matching installation of actuator 1 on the inspection pipe 7 of the steam injection boiler, adjust the first control valve 19 to the open state, and adjust the second control valve 20 to the closed state; Step 2: Adjust the axial position of the support guide sleeve 10 and the multi-hole spray pipe 9 so that the multi-hole spray pipe 9 moves inside the inspection pipe 7 of the steam injection boiler to the side closer to the first control valve 19, until the outermost nozzle 12 of the multi-hole spray pipe 9 is aligned with the upper pipe opening of the outermost steam injection boiler heating pipe 13. Step 3: Tighten the pipe body lifting adjustment bolt 24 to lower the height of the support guide outer sleeve 10 and the multi-hole spray pipe 9 until the outer spray nozzle 12 on the multi-hole spray pipe 9 is connected to the pipe opening on the steam injection boiler heating pipe 13, so as to realize the conductive connection between the multi-hole spray pipe 9 and the steam injection boiler heating pipe 13. Step 4: Tighten the pipe body positioning clamping bolt 25 to clamp and position the support guide outer sleeve 10 and the multi-hole spray pipe 9 above the steam injection boiler heating pipe 13; Step 5: Adjust the axial position of the single-hole spray pipe 11 within the support guide sleeve 10 and the multi-hole spray pipe 9 so that the inner spray nozzle 18 on the single-hole spray pipe 11 is aligned with one of the outer spray nozzles 12. Step 6: Tighten the positioning lock nut 15 to lock and fix the single-hole spray pipe 11 onto the support guide outer sleeve 10; Step 7: Start the air compressor 2, air tank 3 and differential pressure cyclone generator 4 in sequence to generate a differential pressure cyclone in the pipeline; Step 8: Start the sand and water supply mechanism 5 to put fine steel sand abrasive into the pipeline. The fine steel sand abrasive is directly carried by the differential pressure cyclone and enters the single-hole spray pipe 11. Then, it enters the steam injection boiler heating pipe 13 through the inner spray port 18 and the outer spray nozzle 12 in sequence. The spiral-moving fine steel sand abrasive removes the scale on the inner wall of the steam injection boiler heating pipe 13. Then, the fine steel sand abrasive and the removed scale enter the sand and water recovery tank 6 through the steam injection boiler lower maintenance pipe 8. Step 9: Loosen the positioning lock nut 15 to release the locking fixation of the single-hole spray pipe 11 on the support guide sleeve 10; Step 10: Adjust the axial position of the single-hole spray pipe 11 within the support guide sleeve 10 and the multi-hole spray pipe 9 so that the inner spray nozzle 18 on the single-hole spray pipe 11 is aligned with the next outer spray nozzle 12. Step 11: Repeat steps 6 to 10 until the scale removal work on the inner wall of the remaining steam injection boiler heating pipe 13 is completed; Step 12: Tighten the pipe body lifting adjustment bolt 24 to raise the height of the support guide outer sleeve 10 and the multi-hole spray pipe 9 until the outer spray nozzle 12 on the multi-hole spray pipe 9 is disengaged from the pipe opening on the steam injection boiler heating pipe 13. Step 13: Adjust the second control valve 20 to the open state and the first control valve 19 to the closed state; Step Fourteen: Adjust the axial position of the support guide sleeve 10 and the multi-hole spray pipe 9 so that the multi-hole spray pipe 9 moves inside the inspection pipe 7 of the steam injection boiler to the side closer to the second control valve 20, until the outermost nozzle 12 of the multi-hole spray pipe 9 is aligned with the upper opening of the outermost steam injection boiler heating pipe 13. Step 15: Repeat steps 3 to 11 until the scale removal work on the inner wall of all steam injection boiler heating pipes 13 is completed; Step sixteen: Repeat all the steps of the scale removal operation, except that the abrasive steel grit put into the pipeline is replaced with clean water. The clean water is directly carried by the differential pressure cyclone and cleans the scale on the inner wall of the steam injection boiler heating pipe 13 through the spiral movement of the clean water until the cleaning operation is completed. The repair work of the steam injection boiler heating pipe 13 is then completed.

[0026] Taking the Xinjiang Oilfield steam injection circulating fluidized bed boiler with model number TG-130-9.5-M as an example, the rated evaporation capacity of this steam injection boiler is 130 tons / hour, the outer diameter of the steam injection boiler heating pipe is 51mm, and the inner diameter of the steam injection boiler heating pipe is 41mm. The multi-hole spray pipe 9 in this invention needs to be customized to match the size of the external spray nozzle 12 on the customized multi-hole spray pipe 9 with the size of the steam injection boiler heating pipe. In addition, in this embodiment, the air compressor 2 is a diesel air compressor with a supply capacity of 25 cubic meters / minute, the air storage tank 3 is a horizontal air storage tank with a volume of 20 cubic meters, the rated pressure of the air storage tank 3 is 0.8 MPa, the main pipe diameter of the differential pressure cyclone generator 4 is DN100mm, the branch pipe diameter of the differential pressure cyclone generator 4 is DN50mm, and the fine steel abrasive and clean water of the sand and water supply mechanism 5 are supplied in tank storage form.

[0027] The solutions described in the embodiments are not intended to limit the scope of protection of the present invention. All equivalent implementations or modifications that do not depart from the present invention are included within the scope of protection of the present invention.

Claims

1. A cleaning, descaling, and repair equipment for heating pipes of a steam injection boiler, characterized in that: The system includes an actuator, an air compressor, an air tank, a differential pressure cyclone generator, a sand and water supply mechanism, and a sand and water recovery tank. The air compressor's outlet is connected to the air tank's inlet, the air tank's outlet is connected to the differential pressure cyclone generator's inlet, the differential pressure cyclone generator's outlet is connected to the sand and water supply mechanism's inlet, and the sand and water supply mechanism's air-material mixing outlet is connected to the actuator's air-material mixing inlet. The actuator is mounted on the upper maintenance pipe of the steam injection boiler. The sand and water recovery tank's air-material mixing inlet is connected to the lower maintenance pipe of the steam injection boiler.

2. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 1, characterized in that: The actuator includes a multi-hole spray pipe, a supporting guide outer sleeve, a single-hole spray pipe, and a pipe body adjustment and positioning assembly. The multi-hole spray pipe has several external nozzles evenly spaced along a straight line, with the spacing between the nozzles matching the spacing of the heating pipes in the steam injection boiler. The supporting guide outer sleeve is coaxially and fixedly connected to the multi-hole spray pipe via a pipe joint. The single-hole spray pipe is coaxially inserted inside the supporting guide outer sleeve and the multi-hole spray pipe, with its outer opening extending beyond the outer opening of the supporting guide outer sleeve. The single-hole spray pipe is positioned relative to the supporting guide outer sleeve and the multi-hole spray pipe... The feed tube has axial sliding freedom, and a positioning locking nut is provided between the outer opening of the supporting guide sleeve and the single-hole feed tube; a sealing plug is fixedly installed at the inner opening of the single-hole feed tube, and a sealing sleeve is fixedly installed on the tube body of the single-hole feed tube adjacent to the sealing plug; an inner feed port is provided on the tube body of the single-hole feed tube between the sealing sleeve and the sealing plug; the sealing sleeve and the sealing plug slide in contact with the inner surface of the multi-hole feed tube; the tube body attitude adjustment and positioning assembly is located between the supporting guide sleeve and the opening of the maintenance tube on the steam injection boiler.

3. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 2, characterized in that: The outer opening of the single-hole spray pipe serves as the gas-material mixing inlet of the actuator, and the outer nozzle of the multi-hole spray pipe serves as the gas-material mixing outlet of the actuator.

4. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 2, characterized in that: The number of the supporting guide outer sleeve is two, and the two supporting guide outer sleeves are distributed symmetrically at both ends of the porous spray pipe.

5. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 2, characterized in that: The number of single-hole spray tubes is two, and the two single-hole spray tubes are distributed symmetrically in mirror image on the inner side of the supporting guide outer tube and the multi-hole spray tube.

6. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 5, characterized in that: A first control valve is installed on the pipeline between the outer opening of the first single-hole spray pipe and the air-material mixing outlet of the sand-water supply mechanism; a second control valve is installed on the pipeline between the outer opening of the second single-hole spray pipe and the air-material mixing outlet of the sand-water supply mechanism.

7. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 2, characterized in that: The number of the tube body adjustment and positioning components is two sets. The two sets of tube body adjustment and positioning components are respectively installed at the two ends of the inspection tube on the steam injection boiler, and the two sets of tube body adjustment and positioning components are distributed in a mirror symmetrical manner.

8. The equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler according to claim 2, characterized in that: The tube body adjustment and positioning assembly includes a bottom sleeve adapter, an end sleeve adapter, an end cap, a tube body lifting and adjusting bolt, a tube body positioning and clamping bolt, a first pressure-bearing gasket, and a second pressure-bearing gasket. The bottom sleeve adapter is coaxially fixed to the inlet of the maintenance tube on the steam injection boiler. The end sleeve adapter is coaxially fixed to the bottom sleeve adapter. The end cap is fixedly installed on the end sleeve adapter. The tube body lifting and adjusting bolt is vertically screwed to the bottom of the end sleeve adapter. The tube body positioning and clamping bolt is vertically screwed to the top of the end sleeve adapter. A lifting guide hole is provided on the end cap, and the supporting guide outer sleeve passes through the lifting guide hole. The first pressure-bearing gasket is located between the supporting guide outer sleeve and the tube body lifting and adjusting bolt. The second pressure-bearing gasket is located between the supporting guide outer sleeve and the tube body positioning and clamping bolt.

9. A method for cleaning, descaling, and repairing heating pipes of a steam injection boiler, comprising the equipment for cleaning, descaling, and repairing heating pipes of a steam injection boiler as described in claim 1, characterized in that, Includes the following steps: Step 1: Complete the matching installation of the actuator on the maintenance pipe of the steam injection boiler, adjust the first control valve to the open state, and adjust the second control valve to the closed state; Step 2: Adjust the axial position of the support guide sleeve and the multi-hole spray pipe so that the multi-hole spray pipe moves inside the inspection pipe of the steam injection boiler to the side closer to the first control valve, until the outermost nozzle of the multi-hole spray pipe is aligned with the outermost pipe opening of the steam injection boiler heating pipe. Step 3: Tighten the pipe body lifting adjustment bolt to lower the height of the support guide outer sleeve and the multi-hole spray pipe until the outer spray nozzle on the multi-hole spray pipe is connected to the pipe opening on the steam injection boiler heating pipe, thus realizing the conductive connection between the multi-hole spray pipe and the steam injection boiler heating pipe. Step 4: Tighten the pipe body positioning and clamping bolts to clamp and position the support guide outer sleeve and the multi-hole spray pipe above the steam injection boiler heating pipe; Step 5: Adjust the axial position of the single-hole spray tube within the support guide sleeve and the multi-hole spray tube so that the inner spray nozzle on the single-hole spray tube is aligned with one of the outer spray nozzles. Step 6: Tighten the positioning lock nut to lock the single-hole spray pipe onto the support guide sleeve; Step 7: Start the air compressor, air tank and differential pressure cyclone generator in sequence to generate differential pressure cyclone in the pipeline; Step 8: Start the sand and water supply mechanism to put fine steel sand abrasive into the pipeline. The fine steel sand abrasive is directly carried by the differential pressure cyclone and enters the single-hole spray pipe. Then, it enters the heating pipe of the steam injection boiler through the inner spray port and the outer spray nozzle in sequence. The spiral-moving fine steel sand abrasive removes the scale on the inner wall of the heating pipe of the steam injection boiler. Then, the fine steel sand abrasive and the removed scale enter the sand and water recovery tank through the lower maintenance pipe of the steam injection boiler. Step 9: Loosen the positioning lock nut to release the locking fixation of the single-hole spray pipe on the support guide sleeve; Step 10: Adjust the axial position of the single-hole spray tube within the support guide sleeve and the multi-hole spray tube so that the inner nozzle on the single-hole spray tube is aligned with the next outer nozzle. Step 11: Repeat steps 6 to 10 until the scale removal work on the inner wall of the remaining steam injection boiler heating pipes is completed; Step 12: Tighten the pipe body lifting adjustment bolt to raise the height of the support guide outer sleeve and the multi-hole spray pipe until the outer spray nozzle on the multi-hole spray pipe is disengaged from the pipe opening on the steam injection boiler heating pipe. Step 13: Adjust the second control valve to the open position and the first control valve to the closed position; Step Fourteen: Adjust the axial position of the support guide sleeve and the multi-hole spray pipe so that the multi-hole spray pipe moves inside the inspection pipe on the steam injection boiler to the side closer to the second control valve, until the outermost nozzle of the multi-hole spray pipe is aligned with the outermost pipe opening on the heating pipe of the steam injection boiler. Step 15: Repeat steps 3 to 11 until all scale removal work on the inner walls of the steam injection boiler heating pipes is completed; Step sixteen: Repeat all the steps of the scale removal operation, except that the abrasive steel grit put into the pipeline is replaced with clean water. The clean water is directly carried by the differential pressure cyclone and cleans the scale on the inner wall of the steam injection boiler heating pipe through the spiral movement of the clean water until the cleaning operation is completed. The repair work of the steam injection boiler heating pipe is then completed.

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