After gas-fired 12 ton mobile boilers for low-nitrogen transformation impact: environmental protection efforts continue to increase, the provinces and cities have introduced various environmental policies. Air pollutant emissions is one of the main issues of governance and environmental protection sectors. For gas-fired boilers for low-nitrogen transformation has also become popular, such as Beijing, Tianjin, Zhengzhou, Xi'an and other places are carrying out renovation work and out of the boiler. Natural gas as a clean energy, can be reduced nearly 100% of the sulfur dioxide and dust emissions, 60% of carbon dioxide emissions and 50% of nitrogen oxide emissions, and help to reduce acid rain, global warming alleviate, reduce proportion of the amount of coal energy important energy; corresponding gas boiler has gradually been used and popular. But not as long as the use of gas-fired boiler can, according to China's introduction of the latest air pollutant emission standards, Beijing and Tianjin, the Yangtze River Delta and other regions, and Zhengzhou, Xi'an and other cities ever to perform the most stringent air pollutant emission standards --30 mg / cubic meter. Many enterprises due to gas-fired boiler installation time relatively early, current nitrogen oxide emissions higher than this standard, however, when the burner exhaust emissions can not meet the standards formulated by the state, need to deal with the transformation of low nitrogen may continue to be put into use .
Horizontal pressure steam 12 ton mobile boiler efficiency of a number of cases China basically making impressive work of coal to gas, horizontal steam boiler with a very large reduces dust infected, the same time emissions of nitrogen oxides and other dangerous gases It has been suppressed. Efficiency is a measure of horizontal steam boiler critical navigation, a good number of cases began to say together to study the topic under pressure horizontal steam boiler efficiency. Through the analysis of relevant departments, horizontal steam boiler heat loss from two important parts: the full value is not ideal combustion and exhaust heat waste. Reducing exhaust waste heat should be modified in the tail horizontal steam boiler flue gas heat reuse install, or a more leading boiler condensate recovery system. Full combustion values are not substandard summarized: the traditional horizontal steam boiler selection ejector combustion engine, resulting in air-fuel ratio can not be flexibly adjusted. Many of the non-selected horizontal steam boiler burner blast automatic machines, air-fuel ratio does not lead to over several following cases: air-fuel ratio over the chance of the more important sub-2: An excessive gas stream, having a full cool air is excess heat acting , leading to increased energy use horizontal steam boiler, steam boiler efficiency horizontal weakened; when the airflow is not enough, will produce insufficient combustion, caused by horizontal steam boiler efficiency is reduced.
Second Session of the CPPCC National Committee Session of March 5 press conference held in the afternoon, the CPPCC National Committee of Population, Resources and Environment Committee, Democratic National Construction Association Central Committee, Environmental Management Division of the Ministry of Ecology Environment Atmospheric Liu Bingjiang said: Last year, resolve more than 30 million tons of steel production capacity, 810 million kilowatts of coal-fired units basically reached the national emission levels of natural gas, built the world's largest clean coal power base, out of 1.3 million units in industrial furnaces, coal accounts for the country's primary energy consumption the proportion of first time below the 60% to 59%, and turned off the small coal-fired 12 ton mobile boilers 23000 units.
At present the country has completed a preliminary air pollution control goals, the future will continue to promote coal-fired boilers governance, and the introduction of more stringent emission performance standards of air pollution.
Four combustion modes of 12 ton mobile boilerBoiler as an energy conversion equipment, plays a very important role in industrial production, can be said to be the core main force of production enterprises. I know the boiler, but it is estimated that most people do not know much about the combustion mode of the boiler. Today, our Fangkuai Boiler will take you to understand the four combustion modes of the boiler. It can be divided into suspended combustion, boiling combustion, layered combustion and gasification combustion. The following is one by one. First, suspension combustion, also known as fire chamber combustion, is a combustion mode in which fuel is injected into the furnace with air in the form of fog, powder or gas. Suspension combustion ignition is rapid, combustion heat The efficiency is high. It is easy to realize automatic operation. The adaptability to load variation is strong. And the adaptability to the fuel is also strong. However, this combustion mode requires a high level of operation, and should not run intermittently. Secondly, boiling combustion is a kind of fluidized boiling combustion of fuel in fluidized bed under the action of appropriate velocity of air. Boiling combustion is suitable for all kinds of coal, especially inferior coal, such as coal gangue. Stone coal, and so on, this combustion mode on the size of coal particles also have certain requirements. The coal mass must be processed and broken into particles with an average diameter less than 10mm during combustion. Delivered by coal-feeding equipment Enter the furnace. Third, layered combustion, also known as fire bed combustion, is a way of burning fuel in a certain thickness on the grate. This combustion mode is only suitable for solid fuels. However, there are certain requirements for particle size (6~50mm). Layered combustion can basically adapt to solid fuel. As long as the mixture of air and fuel layer is good, and there is a certain combustion temperature, the ideal combustion can be achieved. If the air and fuel layer do not mix well, or the local air supply is insufficient, the combustion will be incomplete and the combustion efficiency will be low. This type of combustion is generally used in chain furnaces. IV. Gasification combustion Gasification combustion mainly refers to gasification and direct combustion of coal put into furnace, and this combustion mode is not suitable for coal with low ash content. High-temperature gasification and staged combustion is different from ordinary gasification combustion. Its utilization principle is as follows: under the condition of oxygen, the fuel surface is heated with high-temperature heat source above 800 ℃, so that the fuel can be rapidly pyrolysis and gasification combustion from outside to inside. Part of the high temperature produced by combustion is then gasified at high temperature, and part of the fuel is discharged for work, thus forming a continuous high temperature gasification combustion reaction.
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