Process waste water discharging free method for the production of furfural

A technology of wastewater discharge and new method, applied in heating water/sewage treatment, organic chemistry and other directions, can solve the problems of high operating cost, large investment in wastewater treatment, and difficulty in reaching the standard of sewage, saving sewage charges, saving cooling water, and solving The effect of difficult sewage treatment

Inactive Publication Date: 2005-06-22
刘显臣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a new method for discharging waste water without process in furfural production, so as to solve the problems of large investment in waste water treatment, high operation cost and difficulty in reaching the standard of treated sewage in furfural production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Collect the bottom waste liquid discharged from the bottom of the distillation tower in furfural production, introduce the waste liquid at the bottom of the tower into the heat exchange pool as a cooling liquid, and place the condensed furfural gas in the condenser pipe, and transfer the heated and concentrated The waste liquid is added to the acid matching tank in furfural production.

Embodiment 2

[0009] Collect the tower bottom waste liquid discharged from the bottom of the distillation tower, introduce the tower bottom waste liquid into the heat exchange tank respectively, as a cooling liquid, and locate in the condensation pipe as condensed furfural gas, after the tower bottom waste liquid is evaporated and concentrated, It can also be discharged into the neutralization reaction pool, neutralized by adding sodium hydroxide to generate sodium acetate.

Embodiment 3

[0011] In embodiment 2, the waste liquid at the bottom of the tower after concentration is discharged into the neutralization reaction tank, and calcium hydroxide is added for neutralization to generate calcium acetate.

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PUM

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Abstract

The invention discloses a novel method for eliminating waste water discharge during furfural production which comprises, collecting waste liquid exhaust on the distillation tower bottom during furfural production, introducing the waste liquid into a heat exchange pool as cooling liquid, wherein the condensed furfural gas is located in the condensation pipe, heating and condensating the tower bottom waste liquid and charging into the acid trough for furfural production. The invention effectively solve the sewage treatment problem in the furfural production process.

Description

technical field [0001] The invention belongs to a method for treating organic acid wastewater. In particular, it refers to the improvement of the furfural wastewater treatment method. Background technique [0002] The process wastewater produced in the existing furfural production contains a certain amount of furfural, acetic acid, sulfuric acid and various organic substances. Emission Standards. At present, the treatment of furfural wastewater has been plagued by various production enterprises. Many developed countries have stopped producing in their own country and turned to purchase furfural products from developing countries. The improvement of production has also made these enterprises pay attention to the treatment of furfural wastewater, but they have not been able to find a better treatment method. If the acetic acid recovery method is used, and then biochemical treatment can only reduce the degree of pollution, but still cannot meet the emission standards. There...

Claims

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Application Information

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IPC IPC(8): C02F1/02C07D307/50
Inventor 刘显臣
Owner 刘显臣
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