A kind of sncr denitrification method and device thereof
A technology of denitrification and electric heating device, which is applied in the field of SNCR denitrification method and its device, can solve problems such as undiscovered, and achieve the effects of sufficient reaction, reduced escape amount, and precise temperature control
Active Publication Date: 2015-10-28
广西建筑材料科学研究设计院有限公司
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Problems solved by technology
However, there is no literature report on improving the denitrification efficiency by controlling the atomization effect of reducing agent by temperature.
Method used
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[0037] The present invention will be further described in detail below in conjunction with the examples, which are only to illustrate the present invention more clearly, rather than to limit the present invention.
[0038] like figure 1 As shown, the process flow chart of the denitrification method of the present invention includes the following sequential steps: firstly, the reducing agent is delivered to the reducing agent delivery pipe at room temperature, and then the reducing agent is heated by the reducing agent temperature control system to reach and control the required atomization temperature, Finally, the reducing agent is sprayed into the denitrification reactor after the reducing agent is atomized by boosting the pressure of the booster device to perform the denitrification reaction. Wherein, the ideal atomization temperature is 85-100°C, preferably in the temperature range of 90-95°C. At the same time, the denitrification efficiency in the denitrification process ...
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The invention discloses an SNCR (selective non-catalytic reduction) denitration method and an SNCR denitration device, belonging to the technical field of denitration of flue gas at the tails of kilns. The method comprises the following steps of delivering a reducing agent at normal temperature; controlling the temperature of the reducing agent to ideal atomization temperature; increasing pressure to atomize the reducing agent, and spraying the atomized reducing agent into a denitration reactor for denitration reaction. According to the denitration device corresponding to the method, a reducing agent temperature control system is additionally arranged, so that a reducing agent solution needing to be atomized can be atomized at the ideal atomization temperature, atomization effects are improved, the particle sizes of atomized particles are reduced, the contact area of the particles with nitric oxide in flue gas is enlarged, the reducing agent can be fully reacted with nitric oxide, the escape amount of the reducing agent is reduced, and the denitration efficiency is improved.
Description
technical field [0001] The invention belongs to the technical field of kiln tail flue gas denitrification, and in particular relates to an SNCR denitrification method and a device thereof. Background technique [0002] In order to prevent excessive nitrogen oxides (NOX) polluting the environment from coal combustion in boilers, the kiln tail flue gas should be denitrified. At present, the denitrification of kiln tail gas at home and abroad is mainly based on selective non-catalytic reduction (SNCR) and selective catalytic reduction (SCR). SNCR is a method of reducing nitrogen oxides in the flue gas to nitrogen and water by spraying a reducing agent in the temperature window suitable for denitrification reaction (850-1100°C) without catalyst. The commonly used reducing agents in this method are ammonia water, Urea and hydrogen acid, etc., the reducing agent is directly sprayed into the reaction zone through high-pressure steam or compressed air. Under high temperature condit...
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IPC IPC(8): B01D53/79B01D53/56
Inventor 李学东梁燕飞陈向荣陈霏叶丹玫韦红焰
Owner 广西建筑材料科学研究设计院有限公司