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Environmental-friendly desulfurization process of smoke

A desulfurization process and flue gas technology, applied in gas treatment, use of liquid separation agent, membrane technology, etc., can solve the problems of high suspended impurity content, high equipment investment, system blockage, etc., to improve purity and cleanliness, save desulfurization cost, efficiency

Inactive Publication Date: 2017-08-22
HEFEI DAZHUO ELECTRIC POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the existing ionic liquid desulfurization process, the recovery of the desulfurization solution is performed using the conventional resin desalination process
Therefore, the existing desulfurization process has a series of problems such as high content of suspended impurities in the desulfurization solution, system blockage, low desulfurization rate, and high equipment investment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An environmentally friendly flue gas desulfurization process, comprising the following steps:

[0026] (1) Dust removal and washing of flue gas: the flue gas is passed into the gravity settling chamber to remove most of the sludge and large particles of impurities, and then part of the dust is removed through the dust removal flue; Medium-contact washing, the washing liquid includes the following raw materials in parts by weight: 46 parts of hydrogen peroxide, 8 parts of sodium hydroxide particles, 3 parts of lauryl betaine, and 2 parts of sodium carboxymethyl cellulose.

[0027] (2) Crude hydrogen sulfide removal: Use iron oxide desulfurizer at room temperature for crude desulfurization, when the hydrogen sulfide sulfur content in the effluent of the crude hydrogen sulfide reactor is ≥15μg.g -1 Switch to the spare reactor at any time, heat the original reactor to 65°C, and ventilate naturally to regenerate the iron oxide desulfurizer at room temperature; the operating ...

Embodiment 2

[0032] An environmentally friendly flue gas desulfurization process, comprising the following steps:

[0033] (1) Dust removal and washing of flue gas: the flue gas is passed into the gravity settling chamber to remove most of the sludge and large particles of impurities, and then part of the dust is removed through the dust removal flue; Medium-contact washing, the washing liquid includes the following raw materials in parts by weight: 40 parts of hydrogen peroxide, 6 parts of sodium hydroxide particles, 2 parts of lauryl betaine, and 1 part of sodium carboxymethyl cellulose.

[0034] (2) Crude hydrogen sulfide removal: Use iron oxide desulfurizer at room temperature for crude desulfurization, when the hydrogen sulfide sulfur content in the effluent of the crude hydrogen sulfide reactor is ≥15μg.g -1 Switch to the standby reactor at any time, heat the original reactor to 65°C, and ventilate naturally to regenerate the iron oxide desulfurizer at room temperature; the operating...

Embodiment 3

[0039] An environmentally friendly flue gas desulfurization process, comprising the following steps:

[0040](1) Dust removal and washing of flue gas: the flue gas is passed into the gravity settling chamber to remove most of the sludge and large particles of impurities, and then part of the dust is removed through the dust removal flue; Medium-contact washing, the washing liquid includes the following raw materials in parts by weight: 50 parts of hydrogen peroxide, 10 parts of sodium hydroxide particles, 5 parts of lauryl betaine, and 2 parts of sodium carboxymethyl cellulose.

[0041] (2) Crude hydrogen sulfide removal: Use iron oxide desulfurizer at room temperature for crude desulfurization, when the hydrogen sulfide sulfur content in the effluent of the crude hydrogen sulfide reactor is ≥15μg.g -1 Switch to the standby reactor at any time, heat the original reactor to 76°C, and ventilate naturally to regenerate the iron oxide desulfurizer at room temperature; the operatin...

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PUM

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Abstract

The invention discloses an environmental-friendly desulfurization process of smoke. The desulfurization process comprises the steps of (1) dust elimination and cleaning of smoke: making smoke pass through a dedusting channel to eliminate a part of dust, and adding a scrubbing solution into the channel, wherein the scrubbing solution is prepared from, by weight, 40-50 parts of hydrogen peroxide, 5-10 parts of sodium hydroxide particles, 1-5 parts of dodecyl dimethyl betaine, and 1-3 parts of sodium carboxymethylcellulose; (2) primary removal of hydrogen sulfide: adopting iron oxide desulfurizer under a normal temperature in the primary removal of hydrogen sulfide; (3) first-level fine desulfurization: adopting active carbon desulfurizer under a normal temperature in the first-level fine desulfurization; (4) second-level fine desulfurization: adopting molecular sieve desulfurizer in the second-level fine desulfurization. The multiple types of organic sulfur adsorbent adopted in the environmental-friendly desulfurization process of smoke are all reproducible and capable of being recycled, and the environmental-friendly desulfurization process of smoke has the advantages of getting rid of interference conducted on adsorption and desorption of absorbent by inorganic sulfur impurities, improving efficiency of desulfurization, saving energy to protect environment, decreasing consumption, and increasing the purity and cleanliness of smoke after desulfurization.

Description

technical field [0001] The invention relates to the technical field of desulfurization processing, in particular to an environmentally friendly flue gas desulfurization process. Background technique [0002] In the existing flue gas desulfurization process, most of the ammonia liquid is used to absorb sulfur dioxide in the flue gas, and the ammonia liquid absorbing sulfur dioxide is desorbed during the high-temperature desorption process to obtain sulfur dioxide gas with higher purity, and the ammonia liquid is recycled repeatedly. . At present, there is another process for ionic liquid desulfurization, which usually includes one-stage absorption and one-stage desorption, and in the case of a large amount of dust in the flue gas, a flue gas pre-washing process is used. In addition, in the existing ionic liquid desulfurization process, the recovery of the desulfurization solution is performed using the conventional resin desalination process. Therefore, the existing desulfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/02B01D53/78B01D53/40B01D47/00
CPCB01D53/02B01D47/00B01D53/40B01D53/78B01D2251/106B01D2251/304B01D2251/604B01D2251/80B01D2253/102B01D2253/1124B01D2253/116B01D2257/30B01D2257/304B01D2258/0283B01D2259/40086B01D2259/40088B01D2259/403B01D2259/414
Inventor 杨自芬
Owner HEFEI DAZHUO ELECTRIC POWER CO LTD
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