Comprehensive treatment method for boiler smoke

A boiler flue gas and comprehensive treatment technology, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of high cost and high resource consumption, reduce desulfurization costs, save desulfurization water, and be of great social importance. benefit effect

Inactive Publication Date: 2016-05-11
南京金羚生物基纤维有限公司
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Problems solved by technology

[0002] The flue gas emitted by the current coal-fired boilers contains a certain amount of sulfur dioxide. At present, the commonly used desulfurization methods include limestone desulfurization, double-alkali desulfurization and ammonia desulfurization. These desulfurization methods need to consume more resources and cost. Higher. At present, some enterprises have a large number of mixed liquids generated by treating waste gas containing hydrogen sulfide. These mixed liquids contain a certain amount of sodium hydrosulfide and sodium sulfide. If fresh sodium hydroxide solution is used to treat hydrogen sulfide waste gas,

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  • Comprehensive treatment method for boiler smoke

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[0024] In order to describe the present invention in detail, a specific description will be given below in conjunction with the device using the present invention.

[0025] see figure 1 , an inner cavity sprayer 7 for spraying desulfurization liquid is installed in the inner cavity 2 of the desulfurization tower 30, and a folded plate mist eliminator 6 and a swirl plate removal device are installed on the upper part of the inner cavity 2 of the desulfurization tower 30. Mist device 4, on the upper and lower sides of the folded plate mist eliminator 6 is installed with a cleaning device 5 for cleaning the folded plate mist eliminator 6, the lower part of the desulfurization tower 30 has a flue gas inlet channel 1 and a grey water outlet 12, in the desulfurization tower The upper part of 30 has a flue gas outlet channel 8, the grey water outlet 12 is connected to the buffer tank 9 through the return pipe 11, the buffer tank 9 is respectively connected to the...

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Abstract

A comprehensive treatment method for boiler smoke includes the following steps that firstly, a desulphurization solution containing sodium hydrosulfide and sodium sulfide in a desulphurization tank is pumped into an inner cavity of a desulphurization tower through a desulphurization pump; secondly, sulfur dioxide in the smoke and sodium hydrosulfide and sodium sulfide in the desulphurization solution are reacted in the inner cavity of the desulphurization tower, and the reacted desulphurization solution drops into the lower part of the desulphurization tower and then flows into a buffer tank through a lye outlet; thirdly, an upper-layer solution of the desulphurization solution in the buffer tank flows into the desulphurization tank. According to the method, when the boiler smoke is desulfurated, the solution containing sodium hydrosulfide and sodium sulfide is treated at the same time; by means of the method, existing boiler smoke desulphurization equipment can be refitted without building new desulphurization equipment; by adopting the solution containing sodium hydrosulfide and sodium sulfide for removing sulfur dioxide in the boiler smoke, a lot of desulphurization water can be saved, the flue gas desulphurization cost is lowered, the effect of treating waste with waste is achieved, and great social benefits are achieved.

Description

technical field [0001] The invention relates to a method for treating boiler flue gas. Background technique [0002] The flue gas emitted by the current coal-fired boilers contains a certain amount of sulfur dioxide. At present, the commonly used desulfurization methods include limestone desulfurization, double-alkali desulfurization and ammonia desulfurization. These desulfurization methods need to consume more resources and cost. Higher. At present, some enterprises have a large number of mixed liquids generated by treating waste gas containing hydrogen sulfide. These mixed liquids contain a certain amount of sodium hydrosulfide and sodium sulfide. If fresh sodium hydroxide solution is used to treat hydrogen sulfide waste gas, The resulting mixed solution can be used to make sodium hydrosulfide slices, but some enterprises will produce a large amount of waste lye due to the process requirements in production. The waste lye contains a certain amount of sodium hydroxide and ...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 程虎得
Owner 南京金羚生物基纤维有限公司
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