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Method for treating sulfonation tail gas generated during production of water reducing agent from naphthalene

A technology for tail gas treatment and water reducing agent, which is applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of high replacement frequency, difficulty in eliminating atmospheric pollution, and high operating costs.

Pending Publication Date: 2021-06-29
HUIZHOU JIANKE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this treatment method is that the sublimated naphthalene in the lye will still volatilize into the atmosphere, and it is difficult to eliminate the pollution to the atmospheric environment. In addition, due to the existence of a large amount of naphthalene, the adsorption of activated carbon is invalid, and the replacement frequency is extremely high. high cost

Method used

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  • Method for treating sulfonation tail gas generated during production of water reducing agent from naphthalene

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: The method for the treatment of sulfonated tail gas produced when naphthalene produces water reducing agent, wherein, the method for producing water reducing agent from naphthalene is as above; The processing method of sulfonated tail gas comprises the following steps:

[0025] (1) Pass the tail gas in the sulfonation reactor into the first-level spray tower, spray methylnaphthalene with the first-level spray tower, and the methylnaphthalene spray flow rate is 2M 3 / H; Detect that the non-methane total hydrocarbon content in the tail gas of this 1st stage spray tower is: 13.4mg / m 3 , VOCs content: 7.35mg / m 3 ;

[0026] (2) The tail gas in the 1-stage spray tower is passed into the lye 1-stage spray tower, and the spray tower spray concentration is 32% liquid alkali, and the spray flow rate is 3M 3 / H. Detect the content of non-methane total hydrocarbons in the tail gas of the first-stage spray tower of this lye: 13.0mg / m 3 , VOCs content: 4.35mg / m 3 ....

Embodiment 2

[0032] Embodiment two: the method for the treatment of sulfonated tail gas produced when naphthalene produces water reducing agent, wherein, the method for producing water reducing agent from naphthalene is as above; The processing method of sulfonated tail gas comprises the following steps:

[0033] (1) Pass the tail gas in the sulfonation reactor into the first-level spray tower, spray methylnaphthalene with the first-level spray tower, and the methylnaphthalene spray flow rate is 1.5M 3 / H; Detect that the non-methane total hydrocarbon content in the tail gas of this 1st stage spray tower is: 13.4mg / m 3 , VOCs content: 7.35mg / m 3 ;

[0034] (2) The tail gas coming out from the 1-stage spray tower is further passed into the 2-stage spray tower, and the 2-stage spray tower sprays methylnaphthalene, and the spray flow rate is 1.5M 3 / H; Detect that the non-methane total hydrocarbon content in the tail gas of the first-stage spray tower is: 6.7mg / m 3 , VOCs content: 3.8mg / m ...

Embodiment 3

[0040] Embodiment three: the method for the treatment of sulfonated tail gas produced when naphthalene produces water reducer, wherein, the method for producing water reducer by naphthalene is as above; the treatment method of sulfonated tail gas comprises the following steps:

[0041] (1) Pass the tail gas in the sulfonation reactor into the first-level spray tower, spray methylnaphthalene with the first-level spray tower, and the methylnaphthalene spray flow rate is 2.5M 3 / H; Detect that the non-methane total hydrocarbon content in the tail gas of this 1st stage spray tower is: 13.4mg / m 3 , VOCs content: 7.35mg / m 3 ;

[0042] (2) The tail gas coming out from the 1-stage spray tower is further passed into the 2-stage spray tower, and the 2-stage spray tower sprays methylnaphthalene, and the spray flow rate is 3M 3 / H; Detect that the non-methane total hydrocarbon content in the tail gas of the first-stage spray tower is: 6.7mg / m 3 , VOCs content: 3.8mg / m 3 ;

[0043] (3...

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Abstract

The invention provides a method for treating sulfonation tail gas generated during production of a water reducing agent from naphthalene. The method for producing the water reducing agent from industrial naphthalene comprises a sulfonation reaction stage in a sulfonation reaction kettle, a condensation reaction stage in which an obtained sulfonated substance is transferred into a condensation reaction kettle, and a neutralization reaction stage in a neutralization reaction kettle. The method for treating the sulfonation tail gas is characterized by comprising the steps that (1) the tail gas in a sulfonation reaction kettle is introduced into a first-stage spray tower, wherein the first-stage spray tower is used for spraying methylnaphthalene, and the spraying flow of the methylnaphthalene is 2M < 3 > / H; and (2) the tail gas in the first-stage spray tower is introduced into an alkali liquid first-stage spray tower, the spray concentration of the spray tower is 32%, and the spray flow is 1.5-3 M < 3 > / H; According to the method, on the basis that original sulfonation equipment is not changed, a naphthalene adsorption device is additionally arranged in a tail gas treatment system, and the requirement for naphthalene-free emission is met.

Description

technical field [0001] The invention relates to the technical field of sulfonated tail gas treatment, in particular to a method for treating sulfonated tail gas generated when naphthalene is used to produce a water reducer. Background technique [0002] Naphthalene-based water reducer is a high-efficiency water reducer with simple production process and wide source of raw materials. It is used in machine-made sand concrete. It has the advantages of good adaptability and insensitive dosage. It is currently in great demand in the market. [0003] However, in the production process of naphthalene-based superplasticizers, the treatment of waste gas takes up a lot of resources. Especially in the sulfonation process of industrial naphthalene and concentrated sulfuric acid, a large amount of naphthalene vapor and sulfur dioxide are produced. The usual treatment method is to carry out acid-base neutralization reaction through a liquid alkali spray device, and desublimate the naphtha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/86B01D53/75
CPCB01D53/78B01D53/86B01D53/75B01D2255/802B01D2257/708B01D2257/7027
Inventor 徐大勇曾锦涛曾娘发
Owner HUIZHOU JIANKE IND
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