china cheap natural gas fired steam boiler

Water wall boiler tube leak or burst phenomenon how to do 1, the normal water flow is not greater than the steam flow. 2, the furnace pressure transient and unstable prejudiced. 3, tube leak detection alarm device. 4, the furnace may not tight at the outward discharge gas and water vapor, and a significant leakage sound. 5, the main steam pressure drop. 6, boiler combustion dark flame instability caused by severe boiler fire. 7, when the induced draft fan is automatically cast, abnormal static vane opening is increased, the current increases. 1 reason, the presence of water wall tube material defects or post-production, the installation of the damaged pipe, poor welding quality. 2, the inner tube fouling overtemperature. 3, the inner tube corrosion. 4, water wall wear. 5, the long-term high load operation, furnace coking, coal sulfur corrosion caused by high temperature water wall. 6, improper combustion, flame deflection. 7, in the possession of bad foreign body, the water cycle. 8, the wall of the long-term over-temperature operation. 9, the temperature difference between waterwall tubes, mechanical stress crack. 10, the normal exit or drain sootblower steam punctured tube. 11, smashed chunks of coke furnace water wall tube or serious explosion occurred, resulting in water wall tube suffered external damage. 12, boiler overpressure long run. 13, the boiler starts to heat up, step-up too fast. 1 process, the leakage should try waterwall tubes outage. The leakage is not serious, while still capable of maintaining operation, note that each of the automatic operation when the device, if not normal, it is cut immediately to the manual, if necessary, may be down, down-load operation. Closely monitor the development trend of damaged parts, good accident anticipation, application shutdown as soon as possible. 2, if the leak is serious, the bursting point temperature after a sharp rise in quality work, leading to serious over-temperature wall, unable to maintain the normal operation of the boiler or threaten the safety equipment, emergency shutdown provision should be processed, when the steam temperature to protect the action value, the protection does not move, should immediately hand MFT. 3, note that the operation of the electrostatic precipitator, to strengthen the inspection checks, to prevent fouling, and the electrodes ESP hopper, pipes and the like plugging air preheater ash. 4, after the shutdown, should retain ID fan, the furnace pressure is maintained constant, there is no discharge to be stopped after soda ID fan.

Gas boiler which has few parts of the main gas boiler: the enclosed pipe chimney pipe tube sheet base gas outlet steam dryer Confining the majority of the peripheral tubes to form a complete gas boiler. The main effect of gas boiler: the combustion of the fuel is heated by the feedwater temperature and the exothermic heat of the flue gas with a heated surface, so that a final water into superheated steam having a quality of qualified certain parameters. The water in the boiler to go through preheating, evaporation, overheating in three stages in order to become superheated steam. In fact, in order to improve the efficiency of the steam power cycle, there is a fourth stage, i.e. re-superheating stage, soon after the high pressure turbine expansion work to reduce the pressure and temperature of the steam back to the boiler is heated and then sent to the low pressure turbine cylinder continues to work. In order to meet these four phases change, the boiler must be arranged in the respective heating surface, i.e. the economizer, water wall, superheater and reheater. Superheater and reheater disposed in an upper horizontal flue backpass and functions of the fuel system is to ensure the desired fuel burner. The fuel oil burner system are: tubing and fittings, pumps, solenoid valves, nozzles, heavy oil preheater. The gas burner mainly a filter, pressure regulator, solenoid valve, and then firing solenoid valve, the fuel valve. Economizer disposed in the lower back pass. In order to utilize flue gas heat of heated air required for combustion, usually air preheater arranged after the economizer. Some additional preheating large boiler superheater heating surface or in the furnace, and then heat-receiving surface.

Maintenance of the boiler plant food during the maintenance shutdown has deactivated which is to prevent boiler corrosion. Since boiler shutdown, a large boiler humidity, poor ventilation, if long-term in a wet state, oxygen in the air with the metal heating surface of the wet complete contact, the inner surface layer of brown rust generated; in addition, often the heat receiving surface of the gas side accumulating ash particles during operation, after the shutdown in the humid environment, will cause corrosion of metals. In the boiler shutdown process, the main reason is the presence of moisture and corrosion of metal surfaces of the air. Thus, as long as the metal surface or a metal surface with dry air (oxygen) isolation, can effectively prevent corrosion. The length of the parking time, there are packing, Paul dry, wet security, ventilation PROTECTION. 1, pressure maintenance Pressure maintenance is suitable for up to one week shutdown of the boiler. The residue pot pressure 0.05 ~ 0.1MPa, temperature slightly above 100 ℃. Boiler pressure and temperature to maintain regular methods using steam heating the water adjacent to the boiler, a heating boiler or intermittently. 2. Dry Dry care maintenance is a method to protect the desiccant into the pot and in the furnace. Its purpose is to keep no water jug. The utility model is suitable for long-term or seasonal shutdown boiler heating boiler. Open manholes and hand holes, the header and the drum-dried. When wet boiler room, with appropriate use of the furnace heat or light burning wood, so that the furnace, the furnace wall flue drying. After drying the boiler is cooled, the opening and tray formulated desiccant tube is placed in the pot, and a collecting box grate, then tightly closes the inlet aperture, and a valve connected to the hand hole to prevent air from entering. For some Mifengbuyan valves, plug board should be increased.

August 21 this year, is located in Tai'an City, Shandong Province People's Government issued the "Tai'an City 2018-- 2020 coal consumption reduction alternative work" (the "Program"), "plan" put forward the goal: by 2020 the city's coal total consumption control in less than 16.85 million tons.

"Plan" indicated, coal and other industries to promote the advanced production capacity instead of backward production capacity, optimize the layout of the coal industry, shutting down and eliminate small coal-fired boilers. Upon completion of the city's 10 tons of steam per hour and cleared of all coal-fired boilers, the city and county levels, no new urban area per hour and 35 tons of steam coal-fired boilers; 65 tons of steam per hour and higher fuel coal boiler completed the transformation of energy-saving and ultra-low emissions, reduce coal pollution, speed up the heating pipe network construction to expand the scope of central heating. Actively expand the consumer market in natural gas, fuel structural adjustment, encourage the development of direct supply of natural gas to large users to promote key industrial enterprises, industrial parks to achieve direct supply of natural gas. By 2020, natural gas consumption in the proportion of energy consumption increased to about 7%.

It is reported that the city will strengthen the clean-up before 2017 and shut down illegal projects, energy regulation and elimination of backward small boilers, small thermal power production, and resolutely prevent their return to work to resume production. And optimizing the layout of the coal industry, in strict accordance with the State-owned power plant deploy clean up illegal construction, and resolutely shut down coal units do not meet behind environmental protection, energy consumption, safety and other requirements. Meanwhile, on the basis of improving industrial enterprises above coal consumption data networking direct reporting system, increase audit statistics and law enforcement, and strengthen the quality of statistical data management, improve the accuracy and timeliness of coal consumption statistics.

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