Device and method for industrially processing nitrogen-containing waste gas

A technology for nitrogen-containing waste gas and waste gas, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve problems such as excessive smoke exhaust

CN106178876AInactive Publication Date: 2016-12-07RISEN ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A device and method for industrially treating nitrogen-containing waste gas, the device includes a sodium hydroxide liquid mixing tank, a sodium thiosulfate liquid mixing tank, a chemical tank, and a three-stage washing tower; the sodium hydroxide liquid mixing tank, sulfur The sodium sulfide dosing pool is communicated with the medicament pool by pipeline respectively; The sidewall of described medicament pool is provided with the discharge pipe that is connected with three-stage washing tower, and the lower end of described three-stage washing tower is provided with drainpipe, upper end A gas outlet pipe is provided, and a waste gas feed pipe is provided on the lower side wall; a water circulation system is provided on the three-stage washing tower. It has the advantages of reducing the precipitation of S particles to block the washing tower, reducing white smoke emission, reducing environmental pollution, no need for peripheral equipment to provide working pressure, less chemical agent usage, and lower processing costs.
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Description

technical field

[0001] The invention relates to the technical field of solar battery waste gas treatment, in particular to an industrial treatment device and method for nitrogen-containing waste gas. Background technique

[0002] Solar cell enterprises produce fluorine-containing and nitrogen-containing acid-base waste gas in the process of etching silicon wafers, which is difficult to deal with. For the original waste gas treatment, caustic soda, ammonia water and sodium sulfide are directly added to the circulating water pool, and the pump passes through the 1st-stage washing tower and 3-layer built-in nozzle spray. The shower reacts with the exhaust gas extracted by the centrifugal fan, and the PP filler is used to increase the reaction area and reaction time; the specific process diagram is attached figure 1 As shown, the reaction principle and equation are as follows:

[0003] HF+NaOH=NaF+H 2 O NO 2 +Na 2 S=4NaNO 3 +4NaNO 2 +4S+N 2 ↑

[0004] HCl+NaOH=NaCl+H 2 ...

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Embodiment Construction

[0025] Below in conjunction with embodiment the present invention is further described in detail. It should be pointed out that the following specific descriptions are all exemplary, and are intended to provide further description of the present invention. Unless otherwise specified, all scientific and technical terms used in this invention have the same meaning as commonly understood by those skilled in the art to which this invention belongs.

[0026] as attached figure 1 Shown: the device of the present invention for industrialized treatment of nitrogen-containing waste gas, the device includes a sodium hydroxide liquid mixing pool 1, a sodium thiosulfate liquid mixing pool 2, a chemical pool 3, and a three-stage washing tower 4; the sodium hydroxide mixing The liquid pool and the sodium thiosulfate mixing pool are respectively communicated with the chemical pool through pipelines; the side wall of the chemical pool is provided with a discharge pipe connected to the three-...