Electric Combustion Boiler and Separation Overburning Air Adjustment Method Based on Numerical Simulation Technology
A numerical simulation technology, a technology for separating the burnout wind, applied in the combustion method, combustion air/fuel supply, combustion type, etc., can solve the problems of low cost, imperfect technology, high cost, and ensure the effectiveness and guarantee. Accuracy, low cost effect
Active Publication Date: 2016-08-31
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology
[0007] Aiming at the problems that the existing technologies for controlling and reducing NOx of various power plant boilers are not perfect, or the effect is not ideal, or the cost is high, the present invention proposes an electric combustion boiler, through the unique structure of the burner and combustion pulverization system, and Various primary and secondary air, burn-off air nozzle settings, increasing SOFA air to reduce NOx emission concentration, can effectively reduce NOx emissions, and do not need to change too much hardware structure, the cost is not high
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Embodiment Construction
[0039] see figure 1 , figure 1 It is a structural schematic diagram of an embodiment of the electric combustion boiler of the present invention.
[0040] The electric combustion boiler includes 4 direct-flow swing burners with a wide adjustment ratio and a combustion pulverizing system;
[0041] The four direct-flow wide-adjustment ratio swing burners are arranged at the four corners of the lower part of the furnace of the electric combustion boiler according to the tangential combustion method to form a tangential combustion method; each direct-flow wide-adjustment ratio swing burner The included angles between the axis of the furnace and the front and rear walls of the furnace are 43° and 35° respectively; each direct-flow wide-adjustment ratio swing burner is arranged with 2 exhaust air nozzles, 6 primary air nozzles and 7 supply air nozzles in the height direction. Secondary air nozzles for fuel combustion air, the primary air nozzles and secondary air nozzles are arrang...
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The invention provides an electric combustion boiler and an SOFA (separated over fire air) adjustment method based on a numerical simulation technique. According to the electric combustion boiler, by means of a unique combustor, a combusting coal pulverizing system structure as well as arrangement of various primary air, secondary air and over fire air nozzles, the SOFA proportion is increased, the NOx emission concentration is reduced by increasing SOFA, further, more hardware structure improvement is not required, and the cost is not high; due to the fact that the SOFA is increased to reduce the NOx emission concentration, the combustion characteristic rule after low-nitrogen transformation of a power plant is subjected to numerical simulation, a numerical simulation result and field operating data are strictly compared and verified, and effectiveness of numerical simulation is guaranteed; therefore, distribution rules of a velocity field, a temperature field, a component field and pollutants are obtained, an NOx distribution rule of a combustor area and the hearth height direction is obtained under the SOFA throttle opening, and the best SOFA throttle opening is obtained through the numerical simulation test.
Description
technical field [0001] The present invention relates to the technical field of electric combustion boilers, in particular to an electric combustion boiler and a method for regulating separated overburning air of the electric combustion boiler based on numerical simulation technology. Background technique [0002] With the severe situation of environmental governance, the emission limit of NOx will become increasingly strict. At present, there are mainly two kinds of NOx control technologies for power plant boilers at home and abroad: one is to control the generation, mainly to change the combustion conditions of coal through various technical means in the combustion process, so as to reduce the amount of NOx generated, that is, various low NOx technologies; The second is the conversion after generation, which mainly removes the generated NOx from the flue gas through technical means, such as selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). ...
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IPC IPC(8): F23C5/32F23L1/00F23L9/00B02C21/00
Inventor 李德波徐齐胜沈跃良
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID