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Naphthalene water reducer sulfonation condensation tail gas recovery process

A naphthalene-based water-reducing agent and tail gas recovery technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve the problems of large loss of naphthalene, inability to effectively recover naphthalene vapor, etc., and achieve the effect of increasing water solubility

Pending Publication Date: 2022-04-08
莱芜市兆信新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the water reducer exhaust gas treatment device in the prior art is mainly used to treat acid mist, and cannot effectively recover naphthalene vapor, resulting in a large loss of naphthalene, the present invention provides a naphthalene-based water reducer sulfonation condensation tail gas recovery process According to the characteristics of the sulfonated condensation tail gas of naphthalene-based water reducers, the present invention adopts the method of cooling, adsorption, spraying and restraining to treat the tail gas at the same time, which can effectively treat the tail gas to the standard of safe discharge

Method used

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  • Naphthalene water reducer sulfonation condensation tail gas recovery process
  • Naphthalene water reducer sulfonation condensation tail gas recovery process
  • Naphthalene water reducer sulfonation condensation tail gas recovery process

Examples

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Effect test

Embodiment 1

[0033] refer to figure 1 , a naphthalene-based water reducer sulfonation condensation tail gas recovery process is characterized in that it includes a condenser, an lye spray tower, a formaldehyde-removing adsorption spray tower, and an emptying tower 8; a condenser, an lye spray tower 1. The formaldehyde-removing adsorption spray tower and the emptying tower 8 are connected by pipelines, and the gas enters from the bottom of each device and is discharged from the top of the device. The pipeline connecting the emptying tower 8 and the formaldehyde-removing adsorption spray tower is installed with Fan 15, fan 15 attracts the gas of the previous step, and at the same time gives a thrust when the gas is evacuated. The body recovery process includes the following steps:

[0034] a. First, the mixed gas enters the condenser-1 to cool the gas;

[0035] B, the gas after cooling enters lye spray tower one 2 and lye spray tower two 3 successively, and the middle and upper parts of des...

Embodiment 2

[0041] refer to figure 1, a naphthalene-based water reducer sulfonation condensation tail gas recovery process is characterized in that it includes a condenser, an lye spray tower, a formaldehyde-removing adsorption spray tower, and an emptying tower 8; a condenser, an lye spray tower 1. The formaldehyde-removing adsorption spray tower and the emptying tower 8 are connected by pipelines, and the gas enters from the bottom of each device and is discharged from the top of the device. The pipeline connecting the emptying tower 8 and the formaldehyde-removing adsorption spray tower is installed with Fan 15, fan 15 attracts the gas of the previous step, and at the same time gives a thrust when the gas is evacuated. The body recovery process includes the following steps:

[0042] a. First, the mixed gas enters the condenser-1 to cool the gas;

[0043] B, the gas after cooling enters lye spray tower one 2 and lye spray tower two 3 successively, and the middle and upper parts of desc...

Embodiment 3

[0049] refer to figure 1 , a naphthalene-based water reducer sulfonation condensation tail gas recovery process is characterized in that it includes a condenser, an lye spray tower, a formaldehyde-removing adsorption spray tower, and an emptying tower 8; a condenser, an lye spray tower 1. The formaldehyde-removing adsorption spray tower and the emptying tower 8 are connected by pipelines, and the gas enters from the bottom of each device and is discharged from the top of the device. The pipeline connecting the emptying tower 8 and the formaldehyde-removing adsorption spray tower is installed with Fan 15, fan 15 attracts the gas of the previous step, and at the same time gives a thrust when the gas is evacuated. The body recovery process includes the following steps:

[0050] a. First, the mixed gas enters the condenser-1 to cool the gas;

[0051] B, the gas after cooling enters lye spray tower one 2 and lye spray tower two 3 successively, and the middle and upper parts of des...

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Abstract

The invention relates to a naphthalene water reducer sulfonation condensation tail gas recovery process, which comprises a condenser, an alkali liquor spray tower, a formaldehyde removal adsorption spray tower and an emptying tower, by aiming at the characteristics of naphthalene water reducer sulfonation condensation tail gas, cooling, adsorption, alkali liquor spray, formaldehyde removal spray and blocking are carried out on the tail gas at the same time, so that the tail gas can be recovered, and the recovery efficiency of the naphthalene water reducer sulfonation condensation tail gas is improved. Gas is fully adsorbed and collected, and the tail gas treated through monitoring and detection completely reaches the emission standard; the regular corrugated packing placed at the middle lower part of the adsorption spray tower for removing formaldehyde can adsorb and prevent flowing gas; a certain volume of water is injected into the lower part of the formaldehyde removal adsorption spray tower, the water passes through a pump and a spray head, and the temperature of the water is reduced through a condenser before atomization, so that the volatilization of formaldehyde liquid and formaldehyde gas in the water is reduced, and the water solubility of formaldehyde is improved.

Description

technical field [0001] The invention relates to the field of production tail gas treatment and recovery, in particular to a process for recovering tail gas from sulfonation and condensation of naphthalene-based water reducers. Background technique [0002] The production process of naphthalene-based water reducers is usually formed by industrial naphthalene being sulfonated with concentrated sulfuric acid at high temperature, hydrolyzed, condensed with formaldehyde, and then neutralized with alkali. Therefore, during the production process of naphthalene-based water-reducers, sublimated naphthalene, Tail gas such as sulfuric acid and formaldehyde volatiles, among which the tail gas produced by the sulfonation process is composed of sublimated naphthalene and sulfuric acid volatiles, the tail gas produced by the condensation process is composed of sublimated naphthalene and formaldehyde volatiles, and the tail gas produced by the neutralization process is composed of formaldeh...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D53/00
Inventor 李传贵王平吴震张文峰李军蔺健全
Owner 莱芜市兆信新材料股份有限公司
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