20ton heavy oil fired steam boiler

Check the work before the start fuel gas-fired boiler in order to protect the safe operation of the gas boiler, improve operational efficiency boiler, make sure to check the work before the boiler starts, every detail can not be ignored. 1, check the safety accessories, thermal instrumentation, electrical instrument should be intact; 2, check the connections, whether the water leakage and the furnace body line; 3, check the waste line, the water line, return line should be smooth; 4 , should check the line voltage is 380V, the fluctuation should be within ± 5%; 5, oil-fired boiler and a filter pump check whether normal oil, gas boiler check the gas pressure is normal, not too high or too low, the oil supply opening valves; 6, check whether the pump Sheung Shui, or opening the purge valve, until the Sheung Shui so far. Water Supply System opens each valve (including the water pump and water valve before and after the boiler); 7, check level gauge, the water level should be in the normal position, to prevent false water level, if the water can be manually Sheung; 8, check the pressure conduit the valve must be opened, the wind deflector must all flue opening; 9, each knob inspection control cabinet are in their normal position; 10, a check valve should be 20ton fired steam boiler in a closed state, the hot water boiler circulating pump valves should be closed state; 11, check water softening equipment is operating correctly, create a variety of indicators of soft water meets national standards. Carefully do the above inspection, the basic conditions for the fuel gas boiler safe and economic operation.

Fangkuai Group has more than 60 independent intellectual property rights, advanced clean fuel boiler manufacturing technology, and jointly established a clean fuel boiler production, research and research cooperation base with Tsinghua University and Xi'an Jiaotong University. An enterprise with a R & D and test center for clean fuel boilers. The thermal efficiency of “Fangkuai” boilers can reach 107%, which has been included in the national special equipment energy-saving catalog. The company developed ultra-low nitrogen full premixed combustion condensing boilers and ultra low nitrogen emission fuel gas boilers, which are developed by the company using Ultran condensation technology.

Why boiler furnace exhaust gas temperature increases heat losses the heat loss is largest in a boiler, furnace 6% is generally fed to the heat, the exhaust gas temperature increasing every 12 ~ 15 ℃, heat losses to an increase of 0.5%. Therefore, the exhaust gas temperature is one of the most important indicators boiler operation. Here are a few reasons may cause the furnace exhaust gas temperature rise: (1) heating surface slagging, fouling. Whether waterwall slagging furnace fouling, or superheater, convection bank, and economizer preheater fouling are due to increased resistance measured smoke, heat deterioration of the cooling effect deteriorates the flue gas, resulting in increased exhaust gas temperature. (2) the excess air ratio is too large. Under normal circumstances, the furnace outlet increases as the excess air ratio of the exhaust gas temperature rises. After the excess air ratio increases, while the amount of smoke increases, the speed increase of smoke, heat strengthening of exiled, but less than the degree of increase in heat transfer gas volume increases more. It will be appreciated as the tobacco rate increased, the time to heat to the flue gas working fluid left the heating surface. (3) leakage factor is too large. Tail shaft furnace and boiler flue negative pressure leakage is inevitable, and provides a heating surface allowed leakage coefficient. When the coefficient of air leakage increases, the influence of the exhaust gas temperature and overfire air coefficient increases similarly. And the closer the leakage furnace, exhaust gas temperature raising effect on the greater. (4) water temperature. When the turbine load is low or high pressure splitting when the heater temperature of the boiler feedwater will decrease. Generally, when the water temperature rises, if the amount of fuel is maintained constant, the temperature difference decreases economizer, economizer heat absorption decreases the exhaust gas temperature rises. (5) the fuel moisture. The fuel in the flue gas to increase the amount of water increases, and therefore the exhaust gas temperature rises. (6) boiler load. Although the boiler load increases, the amount of smoke, the amount of steam to the water, the air amount increases in proportion, but since the furnace exit gas temperature is increased, so that the exhaust gas temperature rises. After the load is increased to increase the furnace outlet temperature, followed by convection heating surface temperature difference increases, an increase in heat absorption, the more so the convection heating surface, the smaller the impact load change of a boiler exhaust gas temperature. (7) The fuel species. When burning low calorific value gas, since the furnace temperature is lowered to reduce the radiation heat transfer in the furnace, the low calorific value gas in a non-combustible components, mainly N2, CO2, H2O more, the amount of flue gas increases, the exhaust gas temperature rise high. Pulverized after burning oil, although oil-fired furnace outlet when the excess air ratio than the coal is low, but the little ash fuel oil, and no larger soot particles, larger ash particles in the flue gas absent the cleaning action of surface heating, convection heating surface more polluting. So bad combustion, often black smoke boiler flue gas temperature. When the tail has means ash ball, since the tail cleaner, the exhaust gas temperature is slightly lower than the burning coal. (8) milling system operation. Bunker has a reservoir of closed milling system is concerned, when the pulverizing system is running, because a portion of the water in the fuel into the furnace, the furnace temperature is reduced and the amount of smoke increases, the leakage into the pulverizing system is running as the primary cold air air into the furnace, to reduce the amount of air flowing through the air preheater to the exhaust gas temperature rises. Conversely, when the exhaust gas temperature is reduced pulverizing system outage.

Natural gas boiler is a kind of thermal energy conversion equipment, which uses natural gas, liquefied gas, city gas and other gas fuels as fuel to burn the heat released from the furnace, heat the water in the pot, and make it vaporize into steam. Water in a pot (drum) is constantly heated by the burning of gas fuel in the furnace to heat up the temperature and produce pressurized steam. Because the boiling point of water increases with the increase of pressure, the pot is sealed, and the expansion of steam in the boiler is restricted to produce pressure to form a thermal force. Strictly speaking, the steam of a boiler is heated to saturated water and vaporized in the drum at constant pressure. It is widely used as an energy source. Natural gas boiler heating In order to protect indoor warmth and human health, so when choosing natural gas boilers, safety issues are very important, and quality issues can not be ignored, only with good quality, in the use of more assured. Some services can also be done better, the choice of heating is customer satisfaction. Understanding natural gas boilers is certainly a need to know the sales situation of the products, if the natural gas boiler reputation is good, it is still very good in comprehensive aspects, worthy of consumer choice, the conversion of performance and thermal energy can also be consulted. There will be no problems when used like this, and there will be no need to worry about electricity during installation The pressure is not enough. Natural gas boiler shut-down method: after stopping the powder feeder, blow the primary duct for 5 minutes before stopping the oil gun. Oil guns should be blown one at a time, not multiple at the same time. After blowing the gun, ventilate the furnace of natural gas boiler for 5 minutes for 8 minutes, and the air volume is not less than 20% of the rated load. To remove combustible material from the furnace. According to the fuel, natural gas boiler can be divided into natural gas 20ton fired steam boiler, city gas steam boiler, coke oven gas steam boiler, liquefied petroleum gas steam boiler, etc. According to the structure form, it can be divided into vertical steam boiler and horizontal steam boiler. Natural gas boiler is shell type Full wet backflow three-way pyrotechnic tube structure, flame combustion in large combustion chamber micro positive pressure combustion, complete extension, low combustion heat load, high combustion heat efficiency, effectively reduce the exhaust temperature, energy saving and consumption reduction, use more economical, The heat absorption strength of the boiler is improved by adopting the structure of corrugated furnace tank and threaded smoke pipe, and the heat exchange surface is expanded to meet the need of heat expansion. It is scientific, reasonable and durable.

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