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Low-nitrogen retrofit plan for natural gas boilers, cost of nitrogen reduction for gas boilers

2021-04-01 09:37    page view:

Guide: In order to protect the environment and the homes we depend on for survival, my country has successively introduced some environmental protection policies, such as the garbage classification in Shanghai, the national coal-to-gas, low-nitrogen transformation and other policies, all to protect our homes and maintain our country. Continuous development. What is the low-nitrogen retrofit plan for the boiler coal-to-gas, natural gas boiler, and what is the cost of nitrogen reduction for gas-fired boilers?

In order to protect the environment and the homes we depend on for survival, my country has successively introduced some environmental protection policies, such as the garbage classification in Shanghai, the national coal-to-gas, low-nitrogen transformation and other policies, all to protect our homes and maintain our country. Continuous development. What is the low-nitrogen retrofit plan for the boiler coal-to-gas, natural gas boiler, and what is the cost of nitrogen reduction for gas-fired boilers? 1. Low nitrogen retrofit plan for natural gas boilers

  Gas boiler flue gas NOx is produced due to the high temperature of gas combustion, which ensures that the center temperature of the furnace flame is lowered and the formation of NOx is suppressed under the condition that the combustion status of the furnace does not change much. Our company adopts FGR low-nitrogen combustion technology. We upgrade and upgrade the boilers and use ultra-low-nitrogen burners to reduce the excess coefficient of cold air entering the furnace to the lowest possible level, and finally achieve the reduction of exhaust heat loss and reduce The energy-saving and emission-reduction effects of the NOx content of exhaust smoke. After the transformation, the NOx content discharged into the atmosphere can reach ≤80mg/m³; if the local environmental protection policy in Xianyang later requires NOx≤30mg, the ultra-low nitrogen NOx≤30mg emission can be met by adding flue gas recirculation pipes.

  FGR low-nitrogen combustion technology uses the pressure head of the combustion-supporting air to suck back part of the combustion flue gas, enter the burner, and mix and burn with the air. Due to the recirculation of the flue gas, the heat capacity of the combustion flue gas is large, the combustion temperature is reduced, and the NOx is reduced. Another type of self-recirculating burner is to recirculate part of the flue gas directly in the burner and add it to the combustion process. This kind of burner has the dual effects of suppressing nitrogen oxides and energy saving.

  FGR flue gas is recirculated and burned. Part of the flue gas is mixed with air and sent to the combustion chamber for combustion. The mixed combustion air can effectively reduce the temperature and oxygen concentration in the combustion chamber. Since the activation energy of the combustion reaction between fuel gas and oxygen is far less than the activation energy of the reaction between oxygen and nitrogen, the combustion reaction of fuel gas and oxygen occurs first. When oxygen is left, the fuel gas reacts with nitrogen to form nitrogen oxides, but the lower temperature in the reaction zone makes the reaction with nitrogen extremely slow, thereby effectively inhibiting the formation of thermal nitrogen oxides.

Natural gas boiler

2. Nitrogen reduction cost of gas boiler

  The cost of low-nitrogen retrofitting of gas-fired boilers needs to be combined with the actual situation of the gas-fired boiler, measuring the diameter of the bladder and related parameters, and formulating a corresponding low-nitrogen retrofitting plan for the boiler. It is necessary to measure the diameter of the furnace and the length of the furnace during the on-site construction. When the burner head is too large and the furnace door needs to be enlarged, the gap around the burner head should be filled with refractory cement after the burner is installed and fixed after expansion. According to the situation of the boiler, an excessive flange is made to ensure that the size requirements of the combustion head extending into the furnace to form an internal circulation are met.

  Our company will make a reasonable cost according to the formulated low-nitrogen transformation plan. If you need to know the detailed cost, you can directly call our company for detailed communication and consultation.

The above is a brief introduction to the low-nitrogen transformation plan of natural gas boilers, and the cost of nitrogen reduction of gas boilers. I hope it will be helpful to you.

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