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Method for flue gas desulfurization by using dyeing wastewater, and absorption tower

A technology for printing and dyeing wastewater and absorption tower, which is applied in separation methods, chemical instruments and methods, and textile industry wastewater treatment, etc., can solve the problems of high desulfurization operation cost, impact on implementation and application, unfavorable environmental protection, etc. The effect of saving resources and promoting governance

Inactive Publication Date: 2007-12-26
JIANGSU ZHENGTONG HONGTAI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for some small and medium-sized enterprises, even the most economical sodium-alkali method, because sodium-alkali such as caustic soda (containing 30% NaHO) and soda ash (NaCO 3 ) The price is high, which makes the operation cost of desulfurization high, affects its implementation and application, and is not good for environmental protection

Method used

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  • Method for flue gas desulfurization by using dyeing wastewater, and absorption tower
  • Method for flue gas desulfurization by using dyeing wastewater, and absorption tower

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The tower diameter D=3.6~3.8m of the absorption tower T101 of the present embodiment, tower body is made of marble, its diameter Dx=3.4m of ring plate 4 of swirl plate mist eliminator, gets blind plate diameter Dm=0.33Dx= 1.1m, using 84 blades 1, blade elevation angle α=25°.

[0033] The printing and dyeing wastewater is sent to the waste lye pool V101 by the waste lye pump P101 from the collection place, and the pH of the waste lye pool is measured to be 10, and sodium alkali (containing 30% NaHO) is added to make the pH value of the waste lye in the pool Adjusted to 12.5, the alkali concentration is 0.0316mol / L, the waste lye is filtered through the filter L201, and the short fibers of the printing and dyeing wastewater are filtered out, and pumped to the spray pipes L101 and L102 located on the upper side of the absorption tower T101. The shower pipes L101 and L102 spray downward through 12 nozzles connected to them, spraying and dispersing the waste caustic soda int...

Embodiment 2

[0036] The tower diameter D=2.5~2.6m of the absorption tower T101 of the present embodiment, the tower body is made of marble, its diameter Dx=2.4m of the ring plate 4 of the swirl plate mist eliminator, get the blind plate diameter Dm=0.33Dx=0.79 m, 42 blades 1 are used, and the blade elevation angle α=25°.

[0037] The printing and dyeing wastewater is sent from the collection place to the waste lye pool V101 with the waste lye pump P101, and the pH of the waste lye pool is measured to be 11. Add lime milk to adjust the pH value of the waste lye in the pool to 13.5. The concentration is 0.3656mol / L. The waste lye is filtered through the filter L201 to filter out the short fibers of the printing and dyeing wastewater, and is pumped to the spray pipes L101 and L102 located on the upper side of the absorption tower T101. The waste water is passed through the spray pipes L101 and L102 It is sprayed downwards through the 7 nozzles connected to it, and the waste lye is sprayed and...

Embodiment 3

[0040]The tower diameter D=1.5m of the absorption tower T101 of the present embodiment, the tower body is made of granite, its diameter Dx=1.4m of the annular plate 4 of swirl plate mist eliminator, gets blind plate diameter Dm=0.33Dx=0.46m, 24 blades 1 are used, and the blade elevation angle α=25°.

[0041] The printing and dyeing wastewater is sent from the collection place to the waste lye pool V101 with the waste lye pump P101, and the pH of the waste lye pool is measured to be 12. Add lime milk to adjust the pH value of the waste lye in the pool to 12. The concentration is 0.0100mol / L. The waste lye is filtered through the filter L201 to filter out the short fibers of the printing and dyeing wastewater. It is pumped to the spray pipes L101 and L102 located on the upper side of the absorption tower T101. The waste water is passed through the spray pipes L101 and L102. Spray downwards through the 5 nozzles connected to it, and spray and disperse the waste lye into droplets....

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Abstract

The invention relates to a method of desulphurization of the waste water and the absorption tower. Its desulphurization method includes: 1) printing waste water pretreatment; 2) the desulphurization about the printing waste water sprays; 3) doctor solution output and so on main steps. The absorption tower contains a tower body, an air outlet on the top of the tower body. The drawing fan is on the outside of the air outlet. The tower in vivo upper side equipped with two defogging levels with two spray levels below. The tower body breast is equipped with the smoke mouth; the tower body base is equipped with the overflow gate. The merit of the invention is that with the printing waste water removing haze in SO2, not only can meet the emission standards, but also can save the sulfuric acid in the printing waste water. Also it can largely reduce chemistry oxygen consumption, which is advantageous in further processing in water disposal plant, and makes the waste water and the waste gas under the comprehensive program of public order. The invention greatly reduces the anti-pollution cost, promotes the business economic benefit, promotes enterprise to implement the waste water and gas governing.

Description

technical field [0001] The invention relates to the technical field of wastewater and waste gas treatment, in particular to a method for desulfurizing flue gas with printing and dyeing wastewater and an absorption tower thereof Background technique [0002] my country is a country where coal is the main energy source, and the annual emission of sulfur dioxide (SO 2 ) volume reaches more than 20 million tons, reducing SO emissions 2 is an urgent task at present. [0003] Wet desulfurization is one of the commonly used methods at present. For small and medium-sized boilers, the flue gas desulfurization methods mainly include: sodium-alkali method, lime-gypsum method, magnesium oxide method and double-alkali method, among which sodium-alkali method has the least investment. However, for some small and medium-sized enterprises, even the most economical sodium-alkali method, because sodium-alkali such as caustic soda (containing 30% NaHO) and soda ash (NaCO 3 ) The price is h...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50C02F1/00C02F103/30
Inventor 胡俊华
Owner JIANGSU ZHENGTONG HONGTAI INC
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