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A kind of resource utilization and treatment method of alkynol wastewater

A treatment method and a resource-recycling technology, applied in the field of resource utilization and treatment of alkynol wastewater, can solve problems such as inability to treat organic impurities in wastewater, and achieve the effect of resource utilization and zero discharge

Active Publication Date: 2022-07-29
NANJING TECH UNIV +1
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  • 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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  • A kind of resource utilization and treatment method of alkynol wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0045] Step (1), pump into above-mentioned alkynyl alcohol waste water in stripping tower, waste water circulates from top to bottom with flow 1500kg / h, stripping air is 120m with gas volume 3 / h backflushing from bottom to top; the stripping tower discharges the ammonia gas blown out by the air, and enters into three ammonia absorption towers connected in series in sequence, and uses water as the absorption liquid for three-stage water absorption. The absorption liquid is independently circulated and absorbed, and the circulation flow of the absorption liquid is 2.4m 3 / h, the first-stage absorption tower recovers...

Embodiment 2

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

[0052] A kind of resource utilization and treatment method of alkynol waste water, the steps are as follows:

[0053] Step (1), pump into above-mentioned alkynyl alcohol waste water in stripping tower, waste water circulates from top to bottom with flow 1800kg / h, stripping air is 144m with gas volume 3 / h backflushing from bottom to top; the stripping tower discharges the ammonia gas blown out by the air, and enters into three ammonia absorption towers connected in series in sequence, and uses water as the absorption liquid for three-stage water absorption. The absorption liquid is independently circulated and absorbed, and the circulation flow of the absorption liquid is 2.9m 3 / h, the first-stage absorption tower recovers 170.2kg...

Embodiment 3

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

[0060] A kind of resource utilization and treatment method of alkynol waste water, the steps are as follows:

[0061] Step (1), pump into above-mentioned alkynyl alcohol waste water in stripping tower, waste water circulates from top to bottom with flow 2000kg / h, stripping air is 160m with gas volume 3 / h backflushing from bottom to top; the stripping tower discharges the ammonia gas blown out by the air, and enters into three ammonia absorption towers connected in series in sequence, and uses water as the absorption liquid for three-stage water absorption. The absorption liquid is independently circulated and absorbed, and the circulation flow of the absorption liquid is 3.2m 3 / h, the first-stage absorption tower recovers 161.9kg / h of ammonia...

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Abstract

The invention discloses a method for resource utilization and treatment of alkynol waste water, which comprises the following steps: air stripping, using large air volume to strip free ammonia molecules in alkynol waste water; water absorption, using multi-stage water absorption to absorb air in the waste water Blow off the ammonia gas to obtain ammonia water; evaporate and crystallize, evaporate part of the water and organic matter in the deaminated brine, supersaturate potassium carbonate and potassium bicarbonate in the wastewater, and partially crystallize; filter, supersaturated solution of potassium carbonate and potassium bicarbonate Through cooling crystallization and filtration, potassium carbonate and potassium bicarbonate crude salt containing organic matter are obtained, and the mother liquor is combined with the deamination waste water to be subjected to evaporative crystallization; alcohol washing is carried out to alcohol washing the crude salt; Thermal decomposition yields a dry potassium carbonate by-product. The method not only can make ammonia nitrogen in alkynol waste water into ammonia water, but also can make potassium carbonate and potassium bicarbonate into potassium carbonate by-product, the purified water can be reused, the purified gas can be discharged up to the standard, and the resource utilization and zero-efficiency of waste water can be realized. emission.

Description

technical field [0001] The invention belongs to the field of alkynol wastewater treatment, relates to a method for resource utilization and treatment of alkynol wastewater, and in particular relates to a method for resource utilization and purification of alkynol wastewater containing free ammonia, organic impurities and high-concentration potassium carbonate . Background technique [0002] In the production process of alkynol (2-methyl-3-butyn-2-ol), under the catalysis of basic catalyst, acetone reacts with acetylene to form alkynol, and the reaction liquid enters the rectification system, from the top of the finished tower The water-containing alkynol is recovered, and the alkynol wastewater is obtained after adding liquid alkali to the tower kettle liquid to decompose and recover the useful components. This type of wastewater has the characteristics of high COD, high ammonia nitrogen and high salt. The COD value of the wastewater is 10000-100000mg / L, and the ammonia nit...

Claims

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Application Information

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Patent Type & Authority Patents(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 TECH UNIV
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