A cwo and mvr combined wastewater pretreatment system and a pretreatment method

A technology for pretreatment and wastewater, applied in the fields of neutralization water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high cost, difficulty and poor effect of chemical synthesis pharmaceutical wastewater pretreatment

Active Publication Date: 2021-04-23
华夏碧水环保科技股份有限公司北京分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the disadvantages of high cost, difficulty and poor effect in the pretreatment of chemical synthesis pharmaceutical wastewater in the prior art, the present invention proposes the combination of CWO technology and MVR evaporation technology

Method used

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  • A cwo and mvr combined wastewater pretreatment system and a pretreatment method

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0052] (T1) Add 20 parts of halloysite nanotubes to the mixed acid of hydrochloric acid and nitric acid, the concentration of hydrochloric acid in the mixed acid is 3M, the concentration of nitric acid is 2M, ultrasonically disperse for 0.5h, and then add 1 part of silane coupling agent KH-550 , continue ultrasonic dispersion;

[0053] (T2) Add 50 parts of activated carbon powder to the halloysite nanotube dispersion in step (1), stir at a constant temperature of 70°C for 3h, wash with deionized water until neutral, and dry to obtain halloysite nanotube modified activated carbon Composite carrier;

[0054] (T3) Immerse the halloysite nanotube modified activated carbon composite carrier in an aqueous solution containing 0.7M copper nitrate, 0.2M manganese nitrate, and 0.1M cerium nitrate, add 1M ammonia water under stirring conditions, and immerse at 60°C for 24h , dried at 90°C for 2 hours, preheated at 220°C for 2 hours, and then heated to 520°C for 10 hours at a rate of 10°...

preparation example 2

[0056] Other conditions are the same as in Preparation Example 1, except that the aqueous solution in step (T3) is 1M copper nitrate, ie does not contain manganese nitrate and cerium nitrate.

preparation example 3

[0058] The other conditions are the same as in Preparation Example 1, except that step (T3) does not carry out preheating, and directly heats up to 520° C. for 10 h at a heating rate of 10° C. / min after drying.

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Abstract

The invention relates to a wastewater pretreatment system combined with CWO and MVR, including a CWO pretreatment system, an air delivery system, and an MVR evaporation system; wherein the CWO pretreatment system includes a regulating tank, a first heat exchanger, and a pretreatment system connected in sequence. Reaction tower, second heat exchanger, main reaction tower; Described MVR evaporation system comprises flash tank, MVR evaporator connected in sequence; Described air conveying system comprises air compressor, air heat exchanger, air preheater Heater; the steam evaporated under reduced pressure in the flash tank exchanges heat with the air heat exchanger, and the high-temperature air of the air heat exchanger enters the air preheater for preheating, and then enters the pre-reaction tower and the main reaction tower , the high-temperature liquid flowing out of the main reaction tower exchanges heat with the first heat exchanger, preheats the outlet water of the regulating tank, and cools the outlet water of the main reaction tower into the flash tank, and the liquid at the bottom of the flash tank enters the MVR evaporator for evaporation, concentration and crystallization , if the condensed liquid meets the standard, it can be discharged, otherwise it will enter the biochemical unit for further processing.

Description

technical field [0001] The invention belongs to the technical field of chemical wastewater treatment, and in particular relates to a chemical synthesis pharmaceutical wastewater pretreatment system and a pretreatment method. Background technique [0002] Chemical synthesis pharmaceutical wastewater is mostly high-salt, high-COD wastewater with complex components and contains a large number of biologically toxic or difficult to be biodegradable pollutants. BOD 5 The / COD value is very low, and the industry currently recognizes that it is difficult to biochemically treat wastewater BOD 5 / COD is less than 0.3, BOD of wastewater that is not easy to biochemically treat 5 / COD is less than 0.25, while chemical synthesis pharmaceutical wastewater is often BOD 5 / COD is less than 0.1 or even lower, and the biodegradability is poor, so it is difficult to meet the standard through traditional biochemical treatment. If it is discharged directly, it will cause serious pollution to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F9/14B01J23/889B01J23/72B01J21/18B01J32/00
CPCB01J21/18B01J23/002B01J23/72B01J23/8892B01J2523/00C02F1/041C02F1/06C02F1/66C02F1/725C02F3/00C02F9/00C02F2303/10B01J2523/17B01J2523/3712B01J2523/72
Inventor 张传兵张冰赵曙光朱利孙振洲刘雄飞侯亚平张新艳龚涛关亚坤赵尚民张海森张文杰吴少杰
Owner 华夏碧水环保科技股份有限公司北京分公司
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