Heavy Oil Fuel Steam Boilers


Heavy Oil Fuel Steam Boilers

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.

Qiaqia Food adhere to "create quality products, spread happiness taste" for the mission, after two years of concentrated operations, increasingly rich product line gradually improve production management system, and improve product awareness, economic and social benefits increase year by year. 2018, Qiaqia plant selector fast fuel gas steam condensing boiler for the production of overseas projects. Fast condensing side fuel gas fuel steam boilers with a blue appearance color used, overall nice; also has energy saving, small footprint, easy operation, long life and other advantages. For the convenience of local plant operations, specifically on the fast side of the operation panel adds English and the local language (s) in the production of boiler Shihai contact contact order.

Principles of fuel steam boilerss and solutions hydraulic external gear: told you about the principles of steam boilers and solutions for steam boiler hydraulic external gear in accordance with the fuel (electricity, oil, gas) can be divided into electric steam boilers, oil steam boiler, gas steam boiler three kinds; constructed according to the steam boiler can be divided into vertical, horizontal steam boiler, steam boiler compact than a single, double return of the vertical structure, a large steam boiler plurality of three-pass horizontal structure. If the classification according to top standards, in the form of steam boilers on the lot, would like to give an ordinary packaged boiler say four tons vapor. Water in the steam drum is heated to become vapor, fire emits heat in the furnace, it is the principle of the steam boiler. Steam boiler combustion section and drive means by a chain grate, a combustion chamber together with the pan rack frame formed on a grate composition. Four weeks envelope refractories.

Safe use of chemical plant fuel steam boilerss and safe use of chemical plant maintenance measures and maintenance measures of a steam boiler, steam boiler how to prepare for chemical corrosion: preparedness, it is necessary to analyze the problem from the root, it is necessary to corrosion from steam boiler elements lead to corrosion of departure, to find a solution. In principle, resulting in steam boiler corrosion is an electrochemical corrosion. Boiler film surface layer of the electrolytic solution absorbs moisture in the air and CO2 constituted, or a metal surface composed of many small primary batteries many weakly acidic, neutral dissolution, iron as the anode, electrons are lost oxidized to Fe2 +, the positive electrode the oxygen dissolved in water to obtain an electron is restored. Corrosion biological structure is made loose, not diffusion barrier profile metal ion etching process will be performed successively. Second, how to deal with chemical steam boiler sewage: sewage is also considered an indicator of boiler steam boiler, now say environmental protection, environmental protection sewage to be called within a certain range. Sewage discharge steam boiler to do less ground row row, that is, the number of sewage to be more, but the amount of each drainage control in a small area, both to ensure that does not affect the steam supply, but also make pot of water quality has been in control It is within specifications, and a large shake does not occur, which is very beneficial for boiler maintenance. Third, the chemical plant steam boiler protection and maintenance: 1, the burner should be every two months removed from the boiler, careful eradicate coke dust and other foreign matter. Photocell light-receiving surface scrub once a month, to keep the fuel filter and clean the filter function; carefully clean the filter inside the oil pump, not to damage the gasket. Not oil-burner idle, to avoid damage to the pump. 2, the protective boiler maintenance, it is necessary to cut off the power supply, it is necessary to relieve pressure. 3, pulling the safety valve once a day, to prevent rusting failure. 4, the water level gauge should always be kept clean, flush purge valve open once a day, to ensure water clarity. 5, when the boiler suspend the operation time is longer, should cut off the power, and do maintenance work: (1), dry maintenance, shutdown after the release came out water, dirt washed clean the furnace, slow fire the pot with a burner drying (combustion time not too long, to avoid damage to the boiler), and then after all the gas boiler drain, everything pipeline valves closed, to see once every three months. (2), wet maintenance for a period not exceed one month shutdown of the boiler, furnace shutdown after water release, discharge clean fill with water, cut off the power, close the valve. 4, the water level gauge should always be kept clean, rinse the purge valve is opened, the water level in order to ensure a clear day. 5, the boiler stops longer running time, cut off the power, and do maintenance work: (1), dry maintenance, shutdown after the release came out water, dirt clean the furnace, slow fire the pot with a burner after drying (burn time not too long, to avoid damage to the boiler), then drain all of the gas boiler, all pipe valve closed, checked every three months. (2), wet maintenance for a period not exceeding one month shutdown of the boiler, furnace shutdown after water release, discharge and clean fill with water, cut off the power, close the valve.

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