Method for treating condensate wastewater in VB1 synthesis process

A synthesis process and condensate technology, applied in filtration treatment, special treatment targets, water/sewage treatment, etc., can solve problems such as clogged pumps and thick kettles

Inactive Publication Date: 2020-10-16
CHIFENG PHARMA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above existing problems, a method for treating condensate waste water in the VB1 synthesis process is provided, which can simplify the difficulty of waste water treatment, improve the treatment efficiency, and solve the problem of solidification of organic matter in the process of waste water treatment, clogging pumps, pipelines, evaporation equipment and thick kettles The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: a kind of method for processing condensate waste water in the synthetic process of VB1, it may further comprise the steps:

[0020] (1) Charcoal column filling: mix 20-60 mesh granular activated carbon and 80-200 mesh powdered activated carbon in a mass ratio of 1:2, and fill it in a stainless steel column with a diameter of 80 cm and a height of 200 cm to make an activated carbon column;

[0021] (2) Adsorption filtration: Add the condensate mother liquor in the VB1 synthesis process to the activated carbon column for filtration, and the filtrate is 20ml / min / cm 2 Speed ​​through the activated carbon column, when the outlet liquid gradually becomes darker from colorless, and when the light transmittance is detected by a spectrophotometer with a detection wavelength of 444nm is greater than 50%, stop filtering and collect the filtrate;

[0022] (3) Concentration and separation: the filtrate is concentrated in a three-effect evaporator, cooled and crystalliz...

Embodiment 2

[0025] Embodiment 2: a kind of method for processing condensate waste water in the synthetic process of VB1, it may further comprise the steps:

[0026] (1) Charcoal column filling: mix 20-60 mesh granular activated carbon and 80-200 mesh powdered activated carbon in a mass ratio of 1:1.8, and pack them in a stainless steel column with a diameter of 60 cm and a height of 250 cm to make an activated carbon column;

[0027] (2) Adsorption filtration: Add the condensate mother liquor in the VB1 synthesis process to the activated carbon column for filtration, and the filtrate is 15ml / min / cm 2 Speed ​​through the activated carbon column, when the outlet liquid gradually becomes darker from colorless, and when the light transmittance is detected by a spectrophotometer with a detection wavelength of 444nm is greater than 50%, stop filtering and collect the filtrate;

[0028] (3) Concentration and separation: the filtrate is concentrated in a three-effect evaporator, cooled and crysta...

Embodiment 3

[0031] Embodiment 3: a kind of method for processing condensate waste water in the synthetic process of VB1, it may further comprise the steps:

[0032] (1) Charcoal column filling: mix 20-60 mesh granular activated carbon and 80-200 mesh powdered activated carbon in a mass ratio of 1:2.2, and pack them in a stainless steel column with a diameter of 100 cm and a height of 150 cm to make an activated carbon column;

[0033] (2) Adsorption filtration: Add the condensate mother liquor in the VB1 synthesis process to the activated carbon column for filtration, and the filtrate is 25ml / min / cm 2 Speed ​​through the activated carbon column, when the outlet liquid gradually becomes darker from colorless, and when the light transmittance is detected by a spectrophotometer with a detection wavelength of 444nm is greater than 50%, stop filtering and collect the filtrate;

[0034] (3) Concentration and separation: the filtrate is concentrated in a three-effect evaporator, cooled and cryst...

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Abstract

The invention discloses a method for treating condensate wastewater in VB1 synthesis process, which comprises the following steps: (1) carbon column filling: uniformly mixing granular activated carbonand powdered activated carbon according to a mass ratio of 1: (1.8-2.2), and filling a stainless steel column with an obtained mixture to prepare an activated carbon column; (2) adsorption and filtration: adding a condensate mother liquor in the VB1 synthesis process into the activated carbon column for filtration; (3) concentration and separation: enabling a filtrate to enter a triple-effect evaporator for concentration, cooling crystallization and centrifugal separation to obtain a deep yellow solid and centrifugal mother liquor; (4) carbon column regeneration: introducing air into the activated carbon column, blow-drying, soaking with methanol, and eluting the activated carbon column with methanol; and (5) methanol recovery: carrying out reduced pressure concentration on a methanol eluent, and recovering methanol. According to the method, the wastewater treatment difficulty is simplified, the treatment efficiency is improved, and the problem that organic matters are solidified to block pumps, pipelines, evaporation equipment and thickening kettles in the wastewater treatment process is solved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for treating condensate wastewater in the synthesis process of VB1. Background technique [0002] Vitamin B1 production wastewater mainly comes from condensate mother liquor, thiothiamine mother liquor and thiamine nitrate mother liquor. The quality of wastewater discharged from each process varies greatly, and the composition of organic impurities in wastewater varies. Among them, the waste water of the condensate mother liquor in the VB1 synthesis process contains a large amount of organic impurities with low polarity and insoluble in water. It is found through research that such substances are the main substances that block pipelines and equipment during concentration treatment. [0003] The condensate mother liquid wastewater contains methanol, salt, organic impurities and water. Wastewater first removes methanol and then the three-effect e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/30C02F103/36
CPCC02F9/00C02F1/04C02F1/283C02F1/38C02F2101/30C02F2103/36C02F2303/16C02F1/001
Inventor 杨梓剑沈贵华孙皓王志伟史宇浩
Owner CHIFENG PHARMA CO LTD
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