Novel ammonium hydroxide mixer for boiler denitration

Abstract

The invention discloses a novel ammonium hydroxide mixer for boiler denitration, which is designed by adopting a tangent circle concept, a certain quantity of spray guns are arranged on a mixer tank according to related indexes of the size of the boiler, original discharge of nitric oxides and local environment requirements, the spray guns are mounted according to certain angles, and high concentration ammonium hydroxide and desalting water pass by the spray guns at intervals on the same floor. The high concentration ammonium hydroxide and desalting water have certain pressure and speed under respective pumping actions, a specific tangent circle is formed in the mixed tank body, and the tangent circle direction of an adjacent layer is opposite, so that a well mixing effect is achieved and the problem of pressure offset is eliminated. In addition, the spray guns of the mixer are provided with switches, and the variable load denitration adjustment of a boiler can be realized by symmetrically closing partial spray guns of the mixer at intervals. The novel ammonium hydroxide mixer is good in effect, low in equipment manufacturing cost, convenient to mount and use, and solves the problem of the pressure offset of the high concentration ammonium hydroxide and the desalting water in the mixer and the problem of incapability of adaption to the denitration under the variable load condition of the boiler.

Description

technical field [0001] The invention belongs to the field of denitrification of coal-fired boilers, and relates to a denitrification device using ammonia water as a reducing agent, in particular to equipment for adjusting the mixed concentration of ammonia and water. Background technique [0002] my country is rich in coal resources, and coal occupies a large share in China's energy structure. According to relevant reports, in 2010, my country's thermal power generation accounted for about 75% of the total power generation, hydropower accounted for about 22%, nuclear power accounted for 1.5%, wind power and solar energy accounted for about 1.5%, and coal-fired units accounted for 90% of the total thermal power generation. about. The consequence of a large amount of coal-fired power generation is high pollution, such as the current smog, acid rain, and the hole in the ozone layer. The emergence of these problems has a lot to do with coal-fired power generation. The governme...

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Problems solved by technology

[0004] The present invention is proposed based on the experience and problems of many engineering projects, and is dedicated to solving the problem that the ammonia water mixer does not have the function of adjusting the ammonia water concentration to adapt to variable loads in the prior art system that uses ammonia water as a reducing agent for denitrification, and the ammonia water mixer The problem of mutual topping of pressure and discontinuous injection of ammonia water

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