Recycling and incineration treatment method of purified terephthalic acid residue

Abstract

The invention discloses a resource recovery and incineration treatment method for purified terephthalic acid residues. An incinerator is used as the incineration treatment equipment, and a reaction kettle is used as the resource recovery treatment equipment. The reaction kettle has a rectification tower, a first condenser and a second condenser. Two condensers, the first condenser has a gas inlet and a liquid outlet, the second condenser has a gas inlet and a liquid outlet, the gas inlet of the first condenser, the gas inlet of the second condenser are respectively connected with the gas inlet of the rectifying tower The outlet is connected, and the method includes the following steps: feeding, dehydration, benzoic acid recovery, waste residue crushing, waste residue grinding and waste residue incineration. The invention can not only effectively extract the useful resources in the residue, realize resource recycling, and recycle the residue, but also increase the amount of incineration by more than three times compared with the prior art, greatly increasing the amount of incineration, and the residue is burned more fully , the harmless treatment is more thorough, more environmentally friendly, the energy consumption is low during treatment, the process is simple and easy, and the cost of residue treatment is lower.

Description

technical field [0001] The invention relates to a treatment method for chemical residues, in particular to a recycling and incineration treatment method for purified terephthalic acid residues. Background technique [0002] Purified terephthalic acid (PTA) is the basic raw material for the production of polyester fiber and PET resin, and the residue of purified terephthalic acid is the chemical waste discharged during the process of preparing purified terephthalic acid. Landfill disposal or random stacking will cause pollution to the environment. The applicant applied for a patent of invention to the China Patent Office on October 10, 2001. The patent application number is 01134015.0, and the name is a method for incinerating purified terephthalic acid residues. Dehydration treatment is carried out to make the water content lower than 60%. The dehydrated material is heated by heating equipment to melt it into a paste material, and the melted paste material is sprayed into t...

AI Technical Summary

Problems solved by technology

[0003] (1) Due to direct incineration without recycling the residue, the useful resources in the residue are greatly wasted;

[0004] (2) Due to the use of paste material injection incineration method, not only the amount of incineration is small, but also the combustion is not sufficient;

[0005] (3) Since the pasty material has a certain amount of moisture, the flue gas processing capacity and processing difficulty of the incinerator are increased;

[0006] (4) Due to the spraying and incineration method of paste-like materials, the paste-like materials fall onto the grate of the incinerator, causing coking, and the furnace needs to be shut down frequently for cleaning, which increases the workload of operators and reduces the efficiency of residue treatment ;

[0007] (5) Since the molten paste material is sprayed into the incinerator for incineration, it is necessary to apply external compressed air with a temperature not lower than 50°C, which increases the cost of residue treatment

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