High-temperature roasting device and treatment method thereof

Abstract

The invention relates to a high-temperature roasting device. The device comprises a waste liquid tank, a high-pressure pump, a cooling tank, a spray combustion system, a combustion fan and a spraying device, wherein the spray combustion system comprises a waste liquid pipeline, a combustion gas pipeline, a combustion-supporting gas pipeline, a spray combustion device, an atomization roasting furnace and a mist pipeline. The high-temperature roasting device has the advantages and the benefits as follows: 1, through filtration and ultrasonic dispersion of a waste liquid, a uniform slurry system is obtained, and the slurry is roasted more sufficiently by means of a special combustion device; 2, in the roasting process, combustible substances such as organic matter and the like are combusted to generate high temperature, compounds difficult to decompose are pyrolysed, the pyrolysis efficiency is high, and recovery is easy to realize; 3, neutralization agents are not required to be added, and new salt components are not introduced; 4, high-concentration organic matters in the waste liquid can be sufficiently utilized and combusted to supply heat, only a little fuel is required to be supplemented, system energy consumption is low, waste heat of high-temperature smoke can be recovered, resources are saved, and the environment is protected; 5, the technological procedure is simple, the system operates stably, the production safety performance is high and the like.

Description

technical field [0001] The invention belongs to the field of waste acid treatment, and in particular relates to a high-temperature roasting device and a treatment method thereof. Background technique [0002] Energy saving and emission reduction has become a major national policy of my country's industrial development. In my country, nearly one million cubic meters of waste acid solution is discharged every year. The waste acid solution is divided into organic acid and inorganic acid. In addition to a considerable amount of residual acid, the inorganic waste acid is also rich in ferrous iron. Salt, while organic waste acid has high COD value and deep color. Some enterprises use acid as auxiliary raw material for the production of waste acid or the waste acid produced in the process of producing other substances cannot be processed, some use acid-base comprehensive treatment, and some use the method of hoarding and storage, which wastes resources and harms The environment is...

AI Technical Summary

Problems solved by technology

[0005] 1) Ion exchange resin method: the pH value has a great influence on it during application, and the coexistent acids in the wastewater have a great influence on the resin, often destroying the resin, so the cost is very high;

[0006] 2) There are still a large amount of organic matter mixed in the regenerated acid in the waste acid treated by the extraction method, and the treatment is not thorough; in addition, the regeneration of crude phenol is difficult. If the crude phenol is not recovered and reused, new organic matter will be added to the organic pollutants. Pollutants (crude phenol);

[0007] 3) The disadvantage of the concentration method is that the production capacity is small, the equipment is corroded seriously, the maintenance cycle is short, and the cost is high, and it takes 50 kg of fuel oil to process one ton of waste acid;

[0008] 4) Neutralization method: Although the treatment by acid-base neutralization can meet the requirements of environmental protection and discharge, the waste acid formed in the production workshop is highly acidic and difficult to deal with. Not only is the workload large, but also the operating cost is high and the waste is serious. New ions are introduced during the neutralization process, therefore, the treated substances cannot be recovered, and the subsequent treatment of the neutralized wastewater is more difficult

Traditional neutralization treatment not only consumes a large amount of neutralizing agent, but also the separation of grease in wastewater after neutralization and the separation of ultrafine particles of titanium dioxide produced by hydrolysis are difficult. The chlorine ions in the treated wastewater are high, and the subsequent treatment costs are high.

Due to the high concentration of titanium-containing suspended particles in the sample, the conventional high-temperature spray treatment method is not only easy to block and damage the combustion device, but also cannot recover the suspended particles, which makes it difficult to treat the exhaust gas after combustion, and the acid components cannot be recovered.

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