Novel process for treating maleic anhydride wastewater

A technology for wastewater treatment and new process, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Reliable, no secondary pollution effect

Active Publication Date: 2015-09-23
PUYANG SHENGYUAN ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at a series of problems caused by the unstable effluent quality of the above-mentioned existing maleic anhy

Method used

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  • Novel process for treating maleic anhydride wastewater
  • Novel process for treating maleic anhydride wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The process flow diagram is as follows figure 1 As shown, a new process for maleic anhydride wastewater treatment, comprising the following steps:

[0021] 1) The wastewater from the maleic anhydride workshop first passes through the grease trap to remove most of the floating oil;

[0022] 2) The waste water after oil separation passes through the waste water pump at a distance of 12m 3 The flow rate of / h enters the centrifugal extractor, turn on the extractant pump, set the flow rate of the extractant and the waste water to enter the centrifugal extractor at the same time according to the flow ratio of wastewater to extractant of 10:1, and set the frequency of the centrifugal extractor to 30Hz; the extractant used is : N,N-bis(1-methylhexyl)hexamide;

[0023] 3) The treated wastewater from the heavy phase outlet of the centrifugal extractor can be discharged up to the standard after further aerobic biological treatment;

[0024] 4) The extract from the light phase ...

Embodiment 2

[0026] The process flow diagram is as follows figure 1 As shown, a new process for maleic anhydride wastewater treatment, comprising the following steps:

[0027] 1) The wastewater from the maleic anhydride workshop first passes through the grease trap to remove most of the floating oil;

[0028] 2) The waste water after oil separation passes through the waste water pump at a distance of 15m 3 The flow rate of / h enters the centrifugal extractor, turn on the extractant pump, set the flow rate of the extractant and the waste water to enter the centrifugal extractor at the same time according to the flow ratio of wastewater to extractant of 15:1, and set the frequency of the centrifugal extractor to 35Hz; the extractant used is : P204;

[0029] 3) The treated wastewater from the heavy phase outlet of the centrifugal extractor can be discharged up to the standard after further aerobic biological treatment;

[0030] 4) The extract from the light phase outlet of the centrifugal ...

Embodiment 3

[0032] The process flow diagram is as follows figure 1 As shown, a new process for maleic anhydride wastewater treatment, comprising the following steps:

[0033] 1) The wastewater from the maleic anhydride workshop first passes through the grease trap to remove most of the floating oil;

[0034] 2) The waste water after oil separation passes through the waste water pump at a distance of 18m 3 The flow rate of / h enters the centrifugal extractor, turn on the extractant pump, set the flow rate of the extractant and the waste water to enter the centrifugal extractor at the same time according to the flow ratio of wastewater to extractant of 18:1, and set the frequency of the centrifugal extractor to 37Hz; the extractant used is : sec-octanol;

[0035] 3) The treated wastewater from the heavy phase outlet of the centrifugal extractor can be discharged up to the standard after further aerobic biological treatment;

[0036] 4) The extract from the light phase outlet of the centr...

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Abstract

The invention relates to a novel process for treating maleic anhydride wastewater. Aiming at the characteristics of high salinity, high COD, high oil content and low biodegradability, most of organic matters and oils can be effectively removed; the influence on a treatment mode of a physical method is smaller compared with an anaerobic treatment process, an extraction effect cannot be influenced by the change of materials, and the organic matters and the oils can be efficiently and stably removed; the method is simple in process and easy to operate, devices can be intermittently operated in an individual manner or in a series connection manner according to process requirements, the number of the devices is unlimited, the devices are easy to mount, operate and maintain, the number of needed staff is small, the labor intensity of workers can be remarkably alleviated, and the labor environment can be improved; moreover, starting up and shutdown are convenient, and online analysis and automatic control are easily implemented.

Description

technical field [0001] The invention relates to the field of maleic anhydride wastewater treatment, in particular to a new process for maleic anhydride wastewater treatment. Background technique [0002] Maleic anhydride wastewater mainly contains maleic acid, fumaric acid, acetic acid, acrylic acid, maleic anhydride, tar, p-hydroxyanisole, DIBE and other organic substances and oils. The most significant four characteristics of this type of wastewater are: (1) High salt, (2) high COD, (3) average biodegradability, (4) high oil content. Several existing maleic anhydride wastewater treatment processes mainly use pretreatment + anaerobic + aerobic treatment processes, and the effluent quality is unstable. Once impacted, it is very likely to cause irreparable damage to the biochemical treatment system, especially the anaerobic system. In addition, in the face of the increasingly severe environmental situation and the improvement of national environmental protection awarenes...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 张立权马广生李洪亮武永生张可阳张书录
Owner PUYANG SHENGYUAN ENERGY TECH
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