An exhaust gas denitrification device and method

Abstract

The invention discloses a waste-gas denitration device. The waste-gas denitration device comprises a waste-gas absorption device and a waste-gas removing device. The waste-gas absorption device is a spraying tower or a bubble tower. The waste-gas removing device is an electrochemistry device which is of an integrated structure, and comprises negative poles, positive poles and a reaction channel; the negative poles are negative-pole three-dimensional electrodes, and the negative poles and the positive poles are arranged in scroll shapes; a water inlet channel is formed in one side of the electrochemistry device, a water outlet channel is formed in the other corresponding side of the electrochemistry device, a gas exhausting hole is formed in the upper portion of the electrochemistry device, electric fields are externally added on the negative poles and the positive poles, absorption liquid in the electrochemistry device is regenerated, and meanwhile nitrogen oxide in waste gas is reduced nitrogen. According to the waste-gas denitration device, nitrogen oxide in the waste gas is absorbed and removed through the absorption liquid, the absorption liquid can be efficiently regenerated, and is continuously cycled in a waste-gas denitration system, and the stable and efficient effect on removing NO in the waste gas is achieved; the high temperature, the mild reaction condition and the like are not required, cost is saved, the storage volume of the absorption liquid is reduced, the device space is saved, and zero pollution to the environment is achieved.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a waste gas denitrification device and method. Background technique [0002] Nitrogen oxides (NOx) are one of the toxic substances in the exhaust gases of chemical industry, national defense industry, electric power industry, boilers and internal combustion engines, etc. major factor of pollution. However, the domestic denitrification technology is still immature, and the treatment of NOx pollution is relatively lagging behind, and the corresponding denitrification market is developing slowly for the time being. The development of waste gas denitrification technology is a major issue to be solved urgently. For this reason, it is imminent to research and develop new technologies for flue gas denitrification, which have the advantages of good treatment effect, low investment and operating costs, and no secondary pollution. [0003] The so-called NOx mainl...

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Problems solved by technology

[0005] Aiming at the problems in the prior art that the denitrification process requires a catalyst, and the catalyst cannot be regenerated, it is easy to cause poisoning, the temperature requirement is high, and raw materials such as urea or ammonia need to be consumed, the purpose of the present invention is to provide a waste gas denitrification device and method , using the method of electrolysis to regenerate the electrolyte, realize the recycling of the absorption liquid, save costs, reduce the storage volume, and maintain an efficient NO removal rate. In the electrolysis device, the adsorbed NO can be reduced to non-toxic and harmless N 2 take off

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