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1. What is a vacuum? Divided into physical vacuum and vacuum industrial vacuum. Vacuum means that no physical space of any particle. Industrial vacuum means a pressure lower than the atmospheric gas space standard. It refers to a thin gas state. It is usually obtained by a special pump. Vacuum vacuum boilers are industrial vacuum.

2. What are vacuum hot water boiler? Vacuum boiler is a vacuum environment, the sealed furnace body negative pressure, so that the furnace body is filled with heating medium water. The heating medium water heated by burning or otherwise, and then evaporated by the heat medium and condensed water into a heat exchanger, then heating the water to be heated by the heat medium water. Vacuum heat boiler indicated: oil, gas, natural gas, natural gas, electricity -> combustion (heat conversion)> heat medium water -> steam condensation heat after boiling -> heat -> Heat Conduction -> vacuum boiler water working principle: the use of water at low pressure characteristics of a low boiling point, rapid heating of the heat medium water sealed furnace body, the heat medium temperature steam generated by the boiling water, the steam condenses on the heat transfer tubes within the heat transfer tubes heating the cold water, to supply hot water purposes. Vacuum boiling point of water and the corresponding table: structural diagram of the degree of vacuum (Kpa) 0-31-54-70-81-89-94-97-99-101 boiling point of water (℃) 10090807060504030200 vacuum hot water boiler:

Hot water boilers, electrical control box may not be water vapor or flammable gas and electrical control box may not be water or steam and flammable gas, shut the door 6,7 good cabinet in the boiler operation, when using the boiler, to ensure replenishment of water inside. Remove the monthly level sensor cleaning prevents the low water level sensor water level should not affect the normal operation of the boiler. 8, boiler stop a long running time, cut off the power, while the water in the boiler tubes put the net, to prevent frost damage, rusting. 9, through "Listen, smell, see, touch," do normal maintenance of the control box, such as abnormal phenomenon should immediately cut off the power timely maintenance. 10, periodically heating tube fastening nut and the screw connections on the flange, to prevent overheating of the oxidation loose, even burn line. 11, the scale on the heating tube is attached easily, especially in hard water, more fouling. If there is no electric water boiler softening equipment, it recommended every 30-40 days, heating pipe disassembly for scale removal process, if the heating treatment equipment should be disassembled for a descaling process tube 6 months. Replace the heating tubes should pay attention to the connection restoration, replacement of bad sealing gasket, good fastening screws on the flange, the fastening screws should be fastened symmetrically repeatedly tightened in order to avoid water leakage. 12, when not the usual boiler, cut off the power, the control box is opened, check all the electrical connections of the nut member, looseness should be tightened to prevent bad burning ignition wires and electrical devices. The body may have a dry boiler maintenance can have a wet maintenance. Letter user 2, boiler water quality should comply with GB1576-2001 "low-pressure boiler water quality," the. When required because of the use of forced overpressure, vacuum measures must be used so as not to exceed the specified pressure. 3,4,5,6, for safety reasons, the boiler must be grounded. Boiler room must be well ventilated to ensure that the boiler house and its surroundings must not be placed flammable and explosive materials. In order to prolong the service life of the boiler and the heating pipe, it is recommended to install on a silicon Regent softener inlet duct. 7, all of which run the boiler, the furnace body should always check furring scale, if the local labor offices should contact quality dosing station or pickling treatment, or because the user does not perform desmutting treatment furnace to cause local overheating causing cracking furnace, the consequences of the users themselves. 8, when the non-blocked drains installed.

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.

Conventional hot water boiler types are: one condensing gas hot water boiler, separate condensing gas water boiler, water gas hot water boiler, a vacuum condensing gas hot water boiler, premix gas hot water boiler fully condensed, ultra-low emissions coupled vacuum boiler, electric heating water boiler, and the like.

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