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Combustion characteristics and operation of steam heating steam atmospheric pressure fire tube boiler steam for steam boilers everyone know how much will the following to let everyone have a preliminary understanding of the steam boiler by two aspects, but also hope to give a friend wanted to buy a steam boiler of some help. Chain-type layer is generally fixed combustible fuel steam boiler chain grate or a grate (the traveling), it is fixed only for small coal-fired boilers. The most commonly used medium-sized coal-fired boilers or for chain grate, as the chain travels will gradually sent to the tail of the coal grate in the process of moving complete fuel combustion tube from the inlet to the lower part of the grate grate internal supplemental air required for combustion, ignition top-down, no ventilation grate uneven seam and around the relative movement, through non-flammable. After heating area of the heating flue gas temperature of the working fluid designed to flow through the same furnace hot flue gas and heating surface arranged in the other exhaust flue boiler. Incidental chain grate type, scale type, beams, and other means, the current domestic applications mainly for small and medium-sized joint type and scale type chain grate, generally large chain grate beam type. Former steam boiler steam boiler system to start all waterproof steam cylinder valve open, let go condensate. The inlet steam valve slightly open, to warm up the cylinder, drain cocks to be out after closing the steam, drain cocks. The steam valve was then opened progressively larger until drainage tank vent cock and water out there, and closed vent cock drain cocks. Turn on the water supply valve to the boiler feed water. Steam boiler in operation if there is gas in timely attention tank, water tank periodically open the air discharge valve, in order to avoid air resistance tank, the influent. Pump flow regulator bypass should be adjusted to achieve the degree of opening of the valve, and not with a method of adjusting the outlet valve is adjusted. At the rated discharge pressure of the pump, which inlet pressure should not exceed a predetermined value. Inlet and exhaust pressure difference should be maintained within a predetermined range. Steam boiler steam valve should be shut down first, then turn off the water valve and turn on the water valve is open, then turn on the water faucet open the lower part of the tank and cylinder, the cylinder water drain. Of steam cylinder reciprocating pump, which cylinder two stroke difference should not exceed 5% of rated travel.
Accessories szs system and heating steam atmospheric pressure fire tube boiler water tube boilers which (1) the fuel system the fuel system of pumps pumping fuel from the fuel tank to the day tank, is then withdrawn from the daily tank fuel pump, through a pressurized, heated, and sprayed into the filter oil atomization. This system is usually divided into the border daily service tank and oil supply system and fuel system. (2) feedwater, condensate water, steam condensate system piping system comprising pipes and valves and piping and other equipment from the deaerator. Steam system comprises a steam pipe and various valves. (3) the ventilation system features a ventilation system external air into the furnace for combustion of fuel, and the products of combustion (flue gases) discharged from the boiler to the atmosphere. In the process of air and flue gas flow, there will be a variety of flow resistance, if the natural ventilation generated by a chimney to overcome the resistance to flow, called natural ventilation. Obviously, this ventilation air flow generated is small, can be improved by increasing the height of the chimney natural ventilation. Using a fan to overcome the flow resistance of various ventilation systems, called mechanical ventilation. Mechanical ventilation is divided into positive pressure ventilation, ventilation and negative balanced ventilation. The so-called positive pressure ventilation means for sending air to the boiler and the flue gas discharged from the boiler to the atmosphere. Primer furnace boiler flue gas exhaust blower suction chamber, known as negative pressure ventilation. (4) boiler auxiliaries and monitoring instrumentation and monitoring instrumentation, boiler accessories boiler safe and economic operation are necessary, including: (A) as an annex to ensure the safe operation of the boiler: water level gauge, safety valve, pressure gauge and thermometer indicating steam parameters ; B) combustion supervision parts: pressure gauge, carbon dioxide indicator, oxygen table, smoking view mirror.
Impact of vertical steam heating steam atmospheric pressure fire tube boiler efficiency is basically a bunch of the root causes of the country are carrying out high-profile coal to natural gas national movement, using the vertical steam boiler, very large cuts infected micro particles, toxic gases such as nitrogen oxides same time smoke has also been suppressed. Vertical steam boiler efficiency is a measure of critical standards, common look behind a pile of roots of the impact of vertical steam boiler efficiency. After investigation authorities, vertical steam boiler heat loss is probably due to include these two: undesirable heat loss and flue gas emissions than adequate combustion air. Emission reduction in heat loss can be retrofitted aft vertical steam boiler exhaust heat recirculation installation, or use more advanced types of condensing boiler. Combustion air is not sufficiently analyze the problem over the ratio: generally vertical steam boiler burner ejector, causing the air-fuel ratio can not maneuver scheduling. Lot of non-vertical steam boiler with automatic blower burner, leading to undesirable air-fuel ratio has the following several roots: air-fuel ratio does not contain points over about two cases: when oxygen is in excess, the excess cold air will have unlimited the effect of heat, resulting in increased operating costs vertical steam boiler, low vertical steam boiler efficiency; when oxygen is insufficient, will have insufficient incineration conditions, to produce low vertical steam boiler efficiency.
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