How to make the steam injection boilers clean ash automatically?
At present, there are many ash cleaning methods used in China, such as ultrasonic vibration, the weak explosion of combustible gas, etc., as well as high-pressure water gun flushing. The methods of ultrasonic vibration ash cleaning and combustible gas weak explosion ash cleaning only stay in the concept, the actual application effect is poor, and cannot fundamentally solve the problem;
high pressure water gun cleaning dust removal effect is slightly better, but it takes time, energy and water, the labor intensity of workers is large, and the environmental pollution is heavy, which does not meet the requirements of HSE. In recent years, the energy efficiency of steam injection boilers has been paid more and more attention.
The soot blowing equipment and technology without automatic control, accurate quantification and environmental pollution will be eliminated.
In view of the above defects existing in the existing technology, Sanjack company provides a method for using a complete set of automatic ash cleaning equipment for steam injection steam injection boilers.
The technical purpose is to provide a method for using the complete set of steam injection steam injection boiler automatic ash cleaning equipment in view of the above defects in the prior art, which has reasonable layout, compact structure, easy operation, maintenance and relocation, can ensure the ash cleaning effect of steam injection steam injection boiler convection section and improve steam injection steam injection boiler energy efficiency.
Air compressor 1, compressed air storage tank 2, stop valve 3, solenoid valve 4, check valve 5, automatic control system 6, rotary soot blower 7, steam pipeline 8, tee pipe 9, air pipeline 10
The technical scheme includes: air compressor, compressed air storage tank, stop valve, solenoid valve, one-way valve, automatic control system, rotary soot blower, steam pipeline, tee pipe and air pipeline. The air compressor is connected with the inlet of compressed air storage tank, and the outlet of compressed air storage tank is connected with air pipeline through stop valve, solenoid valve and one-way valve The one-way valve is controlled by an automatic control system, the rotary soot blower is connected with an air pipeline and a steam pipeline through a three-way pipe, the outlet of the rotary soot blower is connected with a convection chamber, the convection chamber is in a conical structure, and a finned tube is arranged inside the convection chamber;
The rotary soot blower comprises a valve, a medium chamber, a soot blower barrel, a hollow shaft, a big gear, a connecting shaft, a reducer, a motor and an electric control box. The valve is connected with the medium chamber, the interior of the medium chamber is connected with a soot blower barrel, the soot blower barrel is connected with the hollow shaft through a pipe joint, the hollow shaft is connected with the big gear, and the big gear is connected with the reducer and the motor through the connecting shaft, The motor is connected with an electric control box, and the outer end of the soot blower barrel is provided with a supporting plate.
The connecting key on the hollow shaft cooperates with the big gear, the hollow shaft drives the big gear to rotate, one end of the hollow shaft extends into the packing hole on the outlet side of the valve, the rotation seal between the valve is realized by the rotation of the hollow shaft and the packing, and the other end of the hollow shaft is butted with the soot blower barrel through the connecting nut.
The front end of the valve is provided with an arched plate, the hollow shaft passes through the arched plate to connect the medium cavity, the arched plate connection plays the role of connection and support, and the arched plate serves as the front fulcrum for the rotation of the hollow shaft to connect the valve, reducer, motor and convection cavity as a whole.
The soot blowing angle of the above soot blowing gun barrel is 90 ~ 335 °.
The soot blower barrel is provided with a plurality of nozzles, the front end of the soot blower barrel is provided with a spinning head, and the rear end of the soot blower barrel is butted with the hollow shaft through threads.
The use method of a complete set of steam injection boiler automatic ash cleaning equipment mentioned in the technology includes the following steps:
- A) Install the rotary soot blower at a suitable position in the convection section of the steam injection boiler, connect one end of the steam pipeline and air pipeline to the soot blowing medium, and the other end of the steam pipeline and air pipeline to the rotary soot blower, adjust the automatic control system to control the action time interval and soot blowing time length of the rotary soot blower, and the boundary between high-temperature steam and compressed air is controlled by solenoid valve and one-way valve, The automatic control system can freely select the required soot blowing medium, steam or air;
- B) According to different stages of steam injection boiler operation, appropriate soot blowing medium is selected for soot blowing. The hollow shaft guides the soot blowing medium from the valve to the soot blower barrel. The soot blower barrel is connected with the medium cavity for soot blowing. The hollow shaft drives the big gear to rotate. One end of the hollow shaft extends into the packing hole on the outlet side of the valve. The rotation of the hollow shaft and the packing realize the rotational sealing between the valves, The other end of the hollow shaft is connected with the soot blower barrel through the connecting nut. The soot blowing operation is realized by setting the soot blowing angle of the soot blower barrel to 90 ~ 335 °, adjusting the speed of the soot blower barrel to 2.5 rpm, the number of purging turns to 1 or 2, and the soot blowing radius to 1 ~ 1.5m;
- C) After the soot blowing operation is completed, the medium is introduced again to clean the soot blower barrel to prevent the blockage of the soot blower barrel, so as to remove the ash accumulation in the convection section of the steam injection boiler and improve the energy efficiency of the steam injection boiler.
The beneficial effects of the invention are: the complete set of steam injection boiler automatic ash cleaning equipment mentioned in the invention can ensure the function of the whole system, the equipment has reasonable layout, compact structure, easy operation, maintenance and relocation, and can ensure the ash cleaning effect of the convection section of the steam injection boiler.
The use method mentioned in the invention can improve the steam injection boiler energy efficiency, has high degree of automation control, low labor intensity of workers, no environmental pollution, meets the requirements of on-site construction, has high degree of automation, and can greatly reduce the labor intensity of workers.