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Acetic acid residue harmless treatment method

A technology of harmless treatment and residue, which is applied in solid fuel, petroleum industry, solid waste removal, etc., to achieve significant economic benefits.

Inactive Publication Date: 2017-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The conventional treatment method of acetic acid residue is outsourcing treatment, and the cost is about 2000 yuan / ton, which causes a certain economic burden to the enterprise. With the improvement of environmental protection requirements, further requirements are put forward for the treatment of waste
[0006] The patent "A Treatment Method for Acetic Acid Residue" (application number: 201310378878.4) proposes a method for treating acetic acid residue by alkali digestion. Further solutions for the reprocessing of acetic acid residues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the ratio of acetic acid residue, slaked lime and water 100:50:50, mix and stir the slaked lime and water in proportion, then add the acetic acid residue and stir. After the reaction, the pH is 7.1.

[0035] According to the proportion, 65 parts of coal powder, 0.3 part of sodium lignosulfonate, 35 parts of water and 1 part of neutralized acetic acid residue were added to the mixer and stirred for 10 minutes at a stirring rate of 400 rpm to prepare coal water slurry.

[0036] The prepared coal-water slurry has good fluidity. After measurement, the viscosity of the coal-water slurry is 700mPa.S, and the solid content is 62%.

Embodiment 2

[0038] According to the ratio of acetic acid residue, slaked lime and water 90:50:50, mix and stir the slaked lime and water in proportion, then add the acetic acid residue and stir. After the reaction, the pH is 8.2.

[0039] Proportionally add 60 parts of coal powder, 0.5 parts of sodium polystyrene sulfonate, 35 parts of water and 5 parts of neutralized acetic acid residue into the mixer and stir for 20 minutes at a stirring rate of 500 rpm to prepare coal water slurry.

[0040] The prepared coal-water slurry has good fluidity. After measurement, the viscosity of the coal-water slurry is 1100mPa.S, and the solid content is 61%.

Embodiment 3

[0042] According to the ratio of acetic acid residue, slaked lime and water 95:50:50, mix and stir the slaked lime and water in proportion, and then add the acetic acid residue for stirring. After the reaction, the pH is 7.6.

[0043] Proportionally add 63 parts of coal powder, 0.1 part of sodium lignosulfonate, 35 parts of water and 2 parts of neutralized acetic acid residue into the mixer and stir for 15 minutes at a stirring rate of 300 rpm to prepare coal water slurry.

[0044] The prepared coal-water slurry has good fluidity. After measurement, the viscosity of the coal-water slurry is 800mPa.S, and the solid content is 60.5%.

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Abstract

The invention relates to an acetic acid residue harmless treatment method, which comprises: (1) acetic acid residue neutralizing: mixing slaked lime and water according to a certain ratio, adding to acetic acid residue, and completely stirring to form a mixture; (2) coal water slurry preparing: mixing coal powder and the mixture obtained in the step (1) according to a certain mass part ratio, adding the obtained mixed material, an additive and matching water to a stirrer, and stirring for a certain time to prepare the coal water slurry; and (3) gasification treatment: conveying the prepared coal water slurry into a Texaco gasifier, and carrying out high temperature gasification, such that the acetic acid residue is subjected to harmless treatment. According to the present invention, the mixture obtained after the neutralization is weakly alkaline and is used to prepare the coal water slurry so as not to corrode the Texaco gasifier; the calcium ion of the slaked lime added to the acetic acid residue can reduce the ash melting point of the coal water slurry, such that the residue discharging after the gasification of the coal water slurry is easily achieved; and the acetic acid residue releases the heat after the burning, such that the generated heat energy has the significant economic benefits.

Description

technical field [0001] The invention relates to industrial solid waste treatment technology, in particular to a treatment method for acetic acid residue produced in the production process of polyvinyl alcohol, especially a harmless treatment method for acetic acid residue. Background technique [0002] Polyvinyl alcohol (PVA) is a water-soluble polymer with good stability, adhesion and mechanical properties. It is widely used as a chemical slurry in textile, chemical and other industries. The rectification process in the synthesis of industrial PVA is used to separate vinyl acetate and unreacted acetic acid and acetylene in the reaction liquid, and harmful pollutants such as acetic acid residues are produced during the separation process. Acetic acid residue belongs to the hazardous waste specified in the "National Hazardous Waste List". Improper treatment will pollute water, soil and air. [0003] The common treatment method for acetic acid residue is field incineration, b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00C10L5/48
Inventor 李昕阳邱松杨芳芳魏令勇万国晖
Owner CHINA PETROLEUM & CHEM CORP