long operation life coal fired boiler

long operation life coal fired boiler

Today I saw that when the capacity is the same, the furnace of the oil-fired long operation life coal fired boiler is smaller than that of the coal-fired boiler. Why? The specific reasons are as follows: the size of furnace volume, after the boiler capacity is determined, mainly depends on the volume of heat load. The size of the volumetric heat load is mainly determined by the type of fuel. After the fuel enters the furnace, it will take a certain amount of time to burn out. Fuel is usually required to burn out before it leaves the furnace. It is obvious that pulverized coal will burn longer than oil, that is, the flame of coal combustion will be longer than that of oil. In order to ensure the long-term safe operation of the boiler, it is necessary not only to prevent the slagging of the boiler, but also to make the temperature of the flue gas at the furnace outlet begin to change compared with the ash in the flue gas The temperature is 50 ℃ lower than 100 ℃ to prevent slagging at the furnace outlet and subsequent convection heating surfaces. The ash content of coal is more than that of coal-burning furnace, and the flue gas temperature of furnace outlet is 1050 ℃ and 1100 ℃. There is no danger of slagging in the furnace because of the low ash content in the oil, and do not consider the slagging problem of the slag discharge tube at the exit of the furnace, so the smoke temperature at the exit of the furnace can be higher.

Beginning of winter is over, the whole city of Tianjin into the heating season. To protect the normal operation of the long operation life coal fired boiler for heating, Market Authority Wuqing District of heating boilers launched special safety checks to ensure that the boiler use foolproof.

District Supervisor Bureau in-depth understanding of Xintai heating station, heating station and peace in the State Central heating stations, boilers whether to register for the use of the boiler and its safety accessories, combustible gas alarm is within the test period, fireman job Are personnel certificates, if the boiler water through a rigorous inspection process and other aspects. Check the site also records the boiler operation, safety management systems, development and implementation of contingency plans to view, focus your heating boilers meets the requirements of the region's policy "ban on coal zone".

Next, Wuqing District will continue to monitor the safety inspection of heating boilers used as a focus for specific problems, increase the inspection frequency and law enforcement, to protect the safe operation of heating boilers Wuqing District.

Market Authority has in-depth Xintai district heating stations, heating stations and peace in the State Central heating station, focus on checking whether the boiler for the use of registration, boiler and safety accessories, combustible gas alarm is within the test period, fireman whether the worker certificates, if the boiler water after treatment. They also view the site log boiler, the development and implementation of safety management systems, emergency plans, and focus your heating boilers meets the requirements of the region's policy "ban on coal zone". At the same time law enforcement officers required to strictly implement the main responsibility for the safety of special equipment, strengthen emergency duty, special equipment to ensure safe operation. Up to now, law enforcement officers were deployed more than 20 times to check heating boiler unit five times, involving 22 sets of heating boilers, found 10 safety problems, has urged the relevant corrective actions. Next, the council will continue to put safety inspection of heating boilers as a priority, and focus point for the problem, increasing the frequency of inspection and enforcement, to protect the region's heating boiler safe operation.

Low NOx emission combustion long operation life coal fired boiler technology a boiler combustion boiler hypoxic hypoxia NOX emissions from combustion is the easiest way to control. And a combustion burner system does not need to make any changes, only control air flow into the furnace in operation, pulverized coal combustion process as close to the theoretical combustion air amount. Low oxygen combustion scheme can reduce NOX emissions by 20% to 30%. The program practical application subject to conditions. Low oxygen furnace, will increase the amount of unburned carbon, and more difficult for the flame of burning coal more obvious; Further, the CO concentration is also increased so that smoke, which will cause decreased boiler efficiency. Another problem is that for certain boilers, hypoxia causes the main combustion steam or reheat steam temperature is low. The burning coal to immediately, boiler efficiency and reduce the magnitude of steam temperature and other properties to determine the appropriate control value of flue gas oxygen furnace outlet (at or economizer) the specific embodiments. Second, air staged combustion technique combustion air into a plurality of strands, it is gradually mixed and pulverized coal combustion, so you can see the local area to reduce the air-fuel ratio, and the thermal decomposition of coal in the ignition phase, due to hypoxia, and thus the nitrogen oxide generation is suppressed. Air classification may be implemented within the combustor, the boiler can be completed within. 85% of the amount of air required for complete combustion is introduced to the main burner, the main burner combustion zone is insufficient oxygen for the fuel-rich conditions. Due to insufficient amount of oxygen, the flame temperature is low, the amount of nitrogen oxides to less generation of fuel nitrogen intermediates (e.g., NCH, NH3, etc.) will therefore not be oxidized NOX. Meanwhile, it has been possible to further reducing NOX generated in a reducing atmosphere to molecular nitrogen (N2 of), as a result reduces NOX emissions. An upper portion of the top floor is provided Ge overfire air (of OFA) spout into the furnace through which about 15% of the rest of the air, to avoid the high temperature flame zone, it is also possible to burn unburned carbon particles, to complete the combustion process.

At the same time, domestic coal to electric long operation life coal fired boiler company's development is also very good, and its products are also very suitable for the modern concept of social development, so everyone in the choice when space is very large, fast Boiler came to introduce several now the main point advantage domestic coal to electric boiler.

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