Treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment

Abstract

The invention discloses a treating and recycling method of tail gas generating in sulfonated naphthaldehyde water reducing agent production and special equipment thereof. The method comprises the steps of: a, condensation; b, neutralization; c, distillation; and d, recovery of condensed and uncollected gas after spraying. The equipment comprises an intake pipe and an air outlet, both of which are connected with an outlet of tail gas generating in the sulfonated naphthaldehyde water reducing agent production, wherein a condensation kettle and a spray tower are sequentially connected between the intake pipe and the air outlet, the condensation kettle is sequentially connected with a recovery liquid bath and a distillation kettle through a pipeline, the spray tower is communicated with a first regulating tank by a pipeline, and the distillation kettle is communicated with a second regulating tank by a pipeline. The invention more completely processes harmful materials in the tail gas, basically eliminates naphthalene and acidic harmful gases, and reduces the environment pollution caused by the tail gas; the recycled liquid can be reused in the sulfonated naphthaldehyde water reducing agent production, the recovery rate of the tail gas is higher, and the cost of the sulfonated naphthaldehyde water reducing agent production is further reduced.

Description

technical field [0001] The invention relates to a tail gas treatment method in the synthesis process of a concrete admixture sulfonated naphthalene formaldehyde water reducer. Background technique [0002] The successful development of sulfonated naphthalene formaldehyde water reducer in 1965 marked that the science and engineering of cement concrete materials entered a new era. According to statistics, sulfonated naphthalene formaldehyde water reducer accounts for about 70% of my country's water reducer. As long as 0.5%-1.0% of the weight of the cement is added with a naphthalene-based water reducer, the fluidity of the concrete can be greatly improved; Then the amount of cement in concrete can be reduced by 10%-20%. The performance of concrete mixed with water reducing agent is not only greatly improved, but also a large amount of industrial solid waste can be used at the same time, such as fly ash, water-quenched blast furnace slag powder, steel slag powder, calcined co...

AI Technical Summary

Problems solved by technology

However, the current bottleneck in the development of naphthalene-based water reducers is the environmental protection issue, that is, the treatment of tail gas of naphthalene, water, and sulfuric acid gas discharged during the sulfonation process.

[0003] as attached figure 1 Shown is the existing traditional exhaust gas treatment equipment. This equipment only uses the spray method to treat the exhaust gas. The unreasonable part of this treatment method is mainly caused by the use of weak alkaline water to spray and absorb the acid gas in the exhaust gas. These salts will interfere with the quality of the condensation reaction, resulting in a large amount of spray water that cannot be recycled and used, and cannot be discharged outside, resulting in secondary pollution. The spray water cannot be replaced for a long time, and the concentration of the water increases. The higher the increase, the worse the effect of spray absorption, and finally cause pollution to the environment

Images