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Resource utilization and treatment method of alkynol wastewater

A treatment method and resource recovery technology, which is applied in the field of resource utilization and treatment of acetylenic alcohol wastewater, can solve the problems of organic impurities in wastewater that cannot be treated, and achieve the effect of resource recovery and zero discharge

Active Publication Date: 2021-11-26
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can save energy and efficiently realize the deammonization, nitrogen and desalination treatment of high-ammonia nitrogen and high-salt wastewater. At the same time, it can realize zero discharge and resource utilization of high-ammonia nitrogen and high-salt wastewater. However, it is inevitable that the ammonium salt obtained by this method contains other metal salt impurities. , and this method cannot treat organic impurities in wastewater

Method used

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  • Resource utilization and treatment method of alkynol wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Alkyne alcohol wastewater composition: COD value is 45960mg / L, ammonia nitrogen value is 18051mg / L, the content of potassium carbonate is 25.2wt.%, the content of potassium bicarbonate is 0.5wt.%, the content of organic matter is 1.53wt.%, the rest is moisture.

[0044] Such as figure 1 , a resource utilization and treatment method of acetylenic alcohol wastewater, the steps are as follows:

[0045] Step (1), pump the above-mentioned acetylenic alcohol wastewater into the stripping tower, the waste water circulates from top to bottom with a flow rate of 1500kg / h, and the stripping air takes a gas volume of 120m 3 / h backflushing from bottom to top; the stripping tower discharges the ammonia blown out by the air, enters three ammonia gas absorption towers connected in series, and uses water as the absorption liquid for three-stage water absorption, and each stage of the absorption tower The absorption liquid is independently circulated and absorbed, and the circulation...

Embodiment 2

[0051] Alkyne alcohol wastewater composition: COD value is 62198mg / L, ammonia nitrogen value is 25043mg / L, the content of potassium carbonate is 31.6wt.%, the content of potassium bicarbonate is 0.3wt.%, the content of organic matter is 2.07wt.%, the rest is moisture.

[0052] A resource utilization and treatment method of acetylenic alcohol wastewater, the steps are as follows:

[0053] Step (1), pump the above-mentioned acetylenic alcohol wastewater into the stripping tower, the waste water circulates from top to bottom with a flow rate of 1800kg / h, and the stripping air takes a gas volume of 144m 3 / h backflushing from bottom to top; the stripping tower discharges the ammonia blown out by the air, enters three ammonia gas absorption towers connected in series, and uses water as the absorption liquid for three-stage water absorption, and each stage of the absorption tower The absorption liquid is independently circulated and absorbed, and the circulation flow rate of the ab...

Embodiment 3

[0059]Composition of acetylenic alcohol wastewater: COD value is 52080mg / L, ammonia nitrogen value is 20619mg / L, potassium carbonate content is 28.1wt.%, potassium bicarbonate content is 0.4wt.%, organic matter content is 1.74wt.%, and the rest is water.

[0060] A resource utilization and treatment method of acetylenic alcohol wastewater, the steps are as follows:

[0061] Step (1), pump the above-mentioned acetylenic alcohol wastewater into the stripping tower, the waste water circulates from top to bottom with a flow rate of 2000kg / h, and the stripping air takes a gas volume of 160m 3 / h backflushing from bottom to top; the stripping tower discharges the ammonia blown out by the air, enters three ammonia gas absorption towers connected in series, and uses water as the absorption liquid for three-stage water absorption, and each stage of the absorption tower The absorption liquid is independently circulated and absorbed, and the circulation flow rate of the absorption liquid...

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Abstract

The invention discloses a resource utilization and treatment method of alkynol wastewater. The method comprises the following steps: air stripping: stripping free ammonia molecules in the alkynol wastewater by using large-air-volume air; water absorption: absorbing ammonia gas blown off by air in the wastewater by adopting multi-stage water absorption to obtain ammonia water; evaporating and crystallizing to evaporate out part of water and organic matters in the deaminated saline water, so that potassium carbonate and potassium bicarbonate in the wastewater are supersaturated and partially crystallized; filtering, cooling and crystallizing the potassium carbonate and potassium bicarbonate supersaturated solution, filtering to obtain potassium carbonate and potassium bicarbonate crude salt containing organic matters, and combining mother liquor with deaminated wastewater to be subjected to evaporative crystallization; alcohol washing: carrying out alcohol washing on the crude salt; and performing thermal decomposition, namely performing thermal decomposition on wet salt obtained by alcohol washing to obtain a dry potassium carbonate byproduct. According to the invention, ammonia nitrogen in the alkynol wastewater can be prepared into ammonia water, potassium carbonate and potassium bicarbonate can be prepared into a potassium carbonate byproduct, the purified water can be recycled, the purified gas can be discharged after reaching the standard, and recycling and zero discharge of the wastewater can be realized.

Description

technical field [0001] The invention belongs to the field of acetylenic alcohol wastewater treatment, and relates to a method for resource utilization and treatment of acetylenic alcohol wastewater, in particular to a method for resource utilization and purification of acetylenic alcohol wastewater containing free ammonia, organic impurities, and high-concentration potassium carbonate . Background technique [0002] In the production process of acetylenic alcohol (2-methyl-3-butyn-2-ol), under the catalysis of basic catalyst, acetone and acetylene react to form acetylenic alcohol, and the reaction liquid enters the rectification system, from the top of the finished product tower Recover acetylenic alcohol containing water, add liquid caustic soda to decompose and recover useful components in the bottom of the tower, then it will be acetylenic alcohol wastewater. This type of wastewater has the characteristics of high COD, high ammonia nitrogen, and high salt. The COD value ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01D53/86B01D53/44B01D53/14C01C1/02C01C1/10C01D7/00C01D7/12C02F101/16C02F101/30C02F101/34C02F103/36
CPCC02F1/20C02F1/048B01D53/1406B01D53/8668B01D53/8687C01C1/022C01C1/10C01D7/12C01D7/00C02F2101/16C02F2101/30C02F2101/34C02F2103/36
Inventor 崔咪芬乔旭周泽润徐希化陈献周哲齐敏
Owner NANJING UNIV OF TECH
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