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Denitration system

A denitrification and urea technology, applied in the field of denitrification system, can solve the problems of large boiler exhaust smoke loss, unsatisfactory denitrification effect, high production cost, etc., and achieve the effect of small boiler exhaust smoke loss, ideal denitrification effect and low energy consumption

Active Publication Date: 2015-03-25
东莞理文造纸厂有限公司
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Problems solved by technology

However, the denitrification system in the prior art has the disadvantages of unsatisfactory denitrification effect, low denitrification efficiency, large boiler exhaust smoke loss, and high production cost.

Method used

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Embodiment Construction

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] In particular, the "first furnace" and "second furnace" used in the present invention refer to the "first boiler" and "second boiler" respectively.

[0050] Example.

[0051] See figure 1 . A denitrification system of this embodiment includes a DCS controller 1, and includes a urea dissolving tank 2, a urea solution storage tank 3, a urea high-pressure pump 4, a urea regulating valve 5, a mixer 6, a spray gun, and a feeder connected in sequence and the chimney 7; the urea dissolving tank 2 is provided with a urea concentration monitoring circuit and a dissolv...

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Abstract

The invention relates to the technical field of papermaking flue gas denitration and in particular relates to a denitration system. The denitration system comprises a DCS controller, a urea dissolving tank, a urea solution storage tank, a urea high-pressure pump, a urea regulation valve, a mixer, a spray gun, a return feeder and a chimney, wherein the urea dissolving tank, the urea solution storage tank, the urea high-pressure pump, the urea regulation valve, the mixer, a spray gun, the return feeder and the chimney are sequentially connected with one another; the DCS controller is respectively connected with the urea dissolving tank, the urea solution storage tank, the urea high-pressure pump and the urea regulation valve in a controlling mode; the chimney is internally provided with an oxynitride concentration detection circuit, the oxynitride concentration detection circuit is used for acquiring a concentration signal of oxynitride in flue gas of the chimney in real time and sending the concentration signal of the oxynitride in the flue gas of the chimney to the DCS controller, and the DCS controller is used for controlling the chimney to discharge the flue gas according to the concentration signal of the oxynitride in the flue gas of the chimney. The denitration system has the advantages of ideal denitration effect, high denitration efficiency, small loss in flue gas discharge of a boiler, and low production cost.

Description

technical field [0001] The invention relates to the technical field of papermaking flue gas denitrification, in particular to a denitrification system. Background technique [0002] In the process of papermaking, a large amount of flue gas will be produced. This type of flue gas contains a large amount of nitrogen oxides. If these nitrogen oxides are discharged into the atmosphere, they will pollute the environment, affect air quality, and thus affect human health. Therefore, the flue gas produced in the papermaking process must be denitrified before being discharged into the atmosphere. [0003] At present, according to the flue gas emission standards of various industries, it is necessary to reduce the nitrogen oxide pollutants in the flue gas. However, the denitrification system in the prior art has the disadvantages of unsatisfactory denitrification effect, low denitrification efficiency, large boiler exhaust smoke loss, and high production cost. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/79B01D53/56
Inventor 李文斌
Owner 东莞理文造纸厂有限公司
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