how does an industrial boiler work

Emergency shutdown processing steps gas how does an industrial boiler work boiler will sometimes burst some cases, faced with the handling of the emergency shutdown. Xiao Bian summary of the situation based on past experience and measures to deal with the emergency shutdown of the boiler, to help you understand more fully the boiler. First, when the following conditions requiring emergency shutdown 1, vapor pressure exceeds the allowed safety pressure, stopping for gas taken, strengthen water supply, after the wind reduction measures, the pressure is still rising. 2, boiler water, water tables have not see the water level in the steam drum water level gauge steam valve closed or measures to increase the water supply, the water level is still invisible. 3, boiler filled with water, the water level has risen to the highest level of visibility, turn on the water but still no visible water level appears. 4, all the water table or pressure gauge all does not work properly. 5, all safety valves, sewage valve does not work properly all. 6, the boiler pressure parts, such as a drum, tube, water wall tubes is damaged, or when the personal security device crisis. 7, water supply equipment failure, nor spare. 8, while the furnace wall cracks during collapse danger. 9, delivery, induced draft fan damaged, can not continue to run down. 10 other events a serious threat to the safe operation of the boiler. Second, the emergency shutdown processing step 1, quickly turn off process. First shutdown burner, and close the gas supply valve to stop gas supply, and then cut off the valve, and finally opening the air exhaust valve or safety valve down precipitation. 2, rapid cooling furnace water treatment. After the shutdown can not continue to feed water to the boiler. When there is no water leakage or water, the cooling time can be shortened, accelerated cooling rate, cooling down the sewage water through alternate methods, and maintain the level. When the boiler is severely short of water, the method can not take rapid cooling, water supply to the furnace is prohibited to continue, otherwise there will be risk of explosion occurred. When the boiler is full of water, should be reduced combustion (fire thought into a small fire), open the drain valve turn on the water, while the opening of the trap on the main and sub-cylinder steam pipe to prevent steam away large amounts of water to produce water-flushing . 3, during shutdown, so that the furnace is not cooled too fast, to prevent the flue gas, the pressure receiving member and other member by inflation port being damaged by quenching.

The waste heat recovery system raises the temperature at which absorption of SO3 , and the addition of water, takes place during the production of sulphuric acid. By operating at these higher temperatures, the heat of absorption and dilution can be used to generate steam instead of being rejected to a cooling tower. The change which makes this possible is the discovery by Monsanto Enviro-Chem that several commercial alloys are resistant to corrosion at high temperatures if sulphuric acid strengths are kept at greater than 99%. Through studies and process design changes, Monsanto developed a way to operate in the narrow band of acceptable temperatures and strengths, without degrading plant performance. The heat recovery system replaces the normal inter-pass tower with a two-stage absorbing tower, a recirculating pump, heat exchangers and a waste heat recovery how does an industrial boiler work. The tower is made from stainless steel and contains ceramic packing. Gas containing sulphur trioxide leaves the converter system and enters the heat recovery tower near the bottom. It passes upwards through two packed beds and a mist eliminator before leaving the tower at the top. The lower stage performs most of the absorption and is run at a temperature necessary to generate the steam. The upper stage uses a low flow of cool acid to provide trim absorption so the tower can meet emission targets. A special high efficiency distributor system is used in both stages because the system is operating very close to chemical equilibrium limits.

The purchase of gas-fired how does an industrial boiler work, we are more anxious shopping center, but for gas-fired boilers are not very understanding. After the introduction of others, we understand each other fast boiler more comprehensive, and more trust fast boiler. After the boiler put into use, it turns out, party fast products fully meet the needs of our shopping centers. --customer feedback

The main heat exchanger is mainly produced by the Italian company Jia XX, other brands have similar technologies and processes, there is a certain amount of use in Europe. Made of 306 stainless steel, the domestic manufacturers had a laboratory test had the relevant parameters biased in favor of 304 stainless steel. Since the factory said to be 306, we tentatively called 306 stainless steel. The card Va, B license, A licensing other manufacturers are often employed in the form of the main heat exchanger. Analysis: Starting from such a main heat exchanger requires the production process. The plant on the 306 stainless steel pipe wall thickness 0.8mm disc commercially available machine, in a cylindrical disc type, pressure at both ends, the tube was compressed into oval tubes. Because of the longer tube can not be completely uniform scratch in the end, so that during the pressing process, there will inevitably be the case of a partial cut through the flat pipe, and insufficient local flat tube, resulting in uneven diameter, so the use of the segment (cell) method pressed. Such rejection rate is reduced, the yield can be improved, but also can be designed to a fixed power (8-10KW / section) of each cell. So you can always add and subtract the number of how does an industrial boiler work according to design, adjust the power numbers. But this creates new problems, not butt weld between two units, one welding operation is no space, one is butt-welded seam is annular throughout the main heat exchanger, annular weld to half of the slit 900 in the barrel of a high temperature, to be in the half of the outer tub 200, and the same coefficient of expansion, we can not find a suitable welding consumables. Since not welded in series, so manufacturers using parallel method, several units in parallel in a sub-manifold, so that a four-way water warmed in the main heat exchanger, the problem is solved. As a result of the way just division multiple tube form, the diameter of each cell must be greatly reduced, thinner diameter, is about 30% of the normal section of the tube. In the water quality and good after-sales service in Europe, the use of relatively normal.

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