Incineration boiler for saline waste liquid

Abstract

The invention discloses an incineration boiler for saline waste liquid, which mainly structurally comprises a combustor, a waste liquid spray gun, a heat-insulation hearth combustion chamber, a radiation cooling chamber, an upper boiler barrel (a steam drum), a lower boiler barrel, a convection tube bundle, an ash hopper, a boiler wall and a steel frame. As a heat-insulation hearth and a space of the hearth of the incineration boiler are large, the saline waste liquid is preheated, dissolved and combusted quickly and thoroughly after being sprayed into the boiler, noxious substances in the waste liquid can be effectively removed by means of incineration, melted sodium salt alkali liquor is gathered on the lower portion of the hearth along four walls of the hearth and then is drained out of the boiler via an alkali liquor outlet to be recycled, and high-temperature flue gas generated by the incineration boiler sequentially enters the multi-stage radiation cooling chamber and the convection tube bundle so that heat energy is recycled. The incineration boiler is simple in manufacturing process, convenient in maintenance and safe and stable in running, chemical waste gas can be simultaneously incinerated, and the incineration boiler is applicable to popularization and application in terms of treatment of saline waste liquid and waste gas in the industries of chemical engineering and paper making.

Description

technical field [0001] The invention relates to a boiler for incinerating and recovering heat from salt-containing waste liquid in chemical industry and papermaking industry. Background technique [0002] In the production process of chemical industry, papermaking and other industries, a large amount of saline waste water and black liquor are often produced. These waste liquids contain a large amount of harmful chemical substances, such as: liquid hydrogen cyanide, ammonium sulfate, etc., in order to avoid these high-risk pollutants It poses a threat to human health and the natural environment, and it needs to be harmless, reduced and resourced. Due to the high salt content and high toxicity of these waste liquids, they can hardly be treated biochemically. Therefore, it is of great significance to find a reasonable and effective treatment technology to reduce the pollution of the waste liquid to the environment and promote the sustainable development of the industry. [000...

AI Technical Summary

Problems solved by technology

These substances have a strong corrosive effect on the furnace lining and heat exchange surface, which will cause the furnace lining to be burned or the heating surface to be fouled and blocked, resulting in the system not operating normally.

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