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Method and system for treating residue-containing wastewater of dehydropregnenolone acetate

A technology for treating dienolone acetate and waste water, which is applied in the field of medicine and chemical industry, can solve the problems of difficulty in centrifugation and plate-and-frame filtration, unsatisfactory treatment cost and effect, large equipment investment, etc., so as to reduce the pressure of sewage treatment, The effect of eliminating secondary pollution and reducing water content

Active Publication Date: 2016-11-23
湖北民生生物医药有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main methods for the treatment of oily scum wastewater from dienolone acetate production in China include centrifugation after sedimentation and plate-and-frame filter press, but a certain amount of flocculant is usually used, so the activity after treatment will be limited. Reuse of sludge; at the same time, the equipment investment of centrifugal method and plate-and-frame filter method is also relatively large, and because a large amount of oily by-products also enter the sewage treatment station with acid water and alkaline water, it brings great harm to centrifugal and plate-frame filter press. The water content of the waste residue is as high as 30-40%, and there are volatile organic pollutants in the incineration process
[0003] For many years, various manufacturers have used the above-mentioned process to treat dienolone acetate production waste residue, and the treatment cost and effect are not ideal

Method used

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  • Method and system for treating residue-containing wastewater of dehydropregnenolone acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Extract and wash 2500L of slag-containing waste water after dienolone acetate is extracted and washed, and the raw water COD is 35685mg / L. Heat and stir. During heating, the steam is heated to 65°C through the inner coil, and the ultrasonic equipment is turned on at the same time, power: 2.5Kw , frequency: 19.6Khz, time: 15min. At the end of the ultrasonic wave, turn off the steam, stop the agitation, settle naturally for 2 hours, let stand to separate the phases, separate out 2190L of waste water, its COD is 15056mg / L, and the COD is reduced by 57.81%.

[0029] 2. Pump the remaining oil scum into the distillation tank, start stirring, turn on the steam jacket to raise the temperature, control the temperature at 65~80°C, and recover 150.5L of cyclohexane by vacuum distillation, the solvent recovery rate: 86%.

[0030] 3. Put the remaining oil scum into the tray while it is hot, cool down and solidify naturally, and then do solid waste incineration.

Embodiment 2

[0032] 1. Extract and wash 2500L of slag-containing waste water after dienolone acetate is extracted and washed. The COD of the raw water is 37619mg / L, and it is heated and stirred. During heating, the steam is heated to 60°C through the inner coil, and the ultrasonic equipment is turned on at the same time, power: 2.5Kw , frequency: 20Khz, time: 15min. At the end of the ultrasound, turn off the steam, stop stirring, settle naturally for 1 hour, stand still for phase separation, and separate 2214L of waste water, its COD is 17466mg / L, and the COD is reduced by 53.57%.

[0033] 2. Pump the residual oil scum into the distillation tank, start stirring, turn on the steam jacket to raise the temperature, control the temperature at 65~80°C, and recover 151L of cyclohexane by vacuum distillation. The solvent recovery rate is 86.29%.

[0034] 3. Put the remaining oil scum into the tray while it is hot, cool down and solidify naturally, and then do solid waste incineration.

Embodiment 3

[0036] 1. Heat and stir 2500L of slag-containing wastewater in the treatment of dienolone acetate mother liquor, and the raw water COD is 36769mg / L. During heating, the steam is heated to 65°C through the inner coil, and the ultrasonic equipment is turned on at the same time. Power: 2.5Kw, frequency: 19Khz, time: 15min. At the end of the ultrasound, turn off the steam, stop stirring, settle naturally for 1.5 hours, stand still and separate the phases, and separate out 2205L of waste water, its COD is 16640mg / L, and the COD is reduced by 54.74%.

[0037] 2. Pump the residual oil scum into the distillation tank, start stirring, turn on the steam jacket to raise the temperature, control the temperature at 65~80°C, and recover 150L of cyclohexane by vacuum distillation. The solvent recovery rate is 85.71%.

[0038] 3. Put the remaining oil scum into the tray while it is hot, cool down and solidify naturally, and then do solid waste incineration.

[0039] Such as figure 1 Shown, ...

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Abstract

The invention discloses a method and system for treating residue-containing wastewater of dehydropregnenolone acetate. The method comprises the following steps: subjecting wastewater, generated from a production process of the dehydropregnenolone acetate, to heated stirring, then, carrying out precipitation, subjecting a precipitated aqueous phase to further treatment at a sewage treatment section, carrying out distillation at other sections so as to recover cyclohexane, finally, cooling obtained oil scum, and then, carrying out solid waste incineration treatment. According to the method and the system, by an additional ultrasonic treatment step, the rate of mass transfer of a multiphase system is increased by using mechanical action and cavitation of ultrasonics, so that oil-bearing scum and emulsified substances are broken to release moisture, and later-stage precipitation layering is promoted; water-residue separation is carried out through precipitation; residues are distilled to dryness through distillation so as to recover cyclohexane from the residues; many defects of a treatment process can be overcome, the sewage treating pressure is alleviated, the cost is reduced, and thus the method and the system are energy-saving and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of medicine and chemical industry, and relates to the treatment of slag-containing wastewater from the production of steroid hormone drug intermediates, in particular to a treatment system and method for dienolone acetate slag-containing wastewater. Background technique [0002] At present, the traditional process of domestic production of dienolone acetate is to use diosgenin as raw material, undergo pressure cracking, oxidation, hydrolysis (elimination), extraction, refining, mother liquor treatment and recycling. Wherein, a large amount of waste water containing oily scum will be produced in the dienolone acetate extraction process. At present, the main methods for the treatment of oily scum wastewater from dienolone acetate production in China include centrifugation after sedimentation and plate-and-frame filter press, but a certain amount of flocculant is usually used, so the activity after treatment wi...

Claims

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Application Information

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IPC IPC(8): C02F9/10C07C7/04C07C13/18C02F103/34
CPCC02F9/00C07C7/04C02F2103/343C02F2209/08C02F2209/02C02F2209/44C02F1/52C02F1/02C02F1/36C02F1/40C07C13/18Y02P20/10
Inventor 陈孝华邓海锋杨圣华尤晓燕
Owner 湖北民生生物医药有限公司
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