Unlock instant, AI-driven research and patent intelligence for your innovation.

Device and method for treating dichloromethane-containing wastewater

A technology for dichloromethane and a treatment device is applied in the field of treatment devices for waste water containing methylene chloride, and can solve problems such as explosion, increase in internal pressure of a container, and environmental pollution around a human body.

Inactive Publication Date: 2020-11-17
安徽省巨仁环境技术有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On October 27, 2017, the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference. Dichloromethane was included in the list of 2A carcinogens. On January 23, 2019, dichloromethane was included in the toxic and harmful atmosphere. Inventory of Pollutants (2018), on July 23, 2019, dichloromethane was included in the list of toxic and harmful water pollutants. Dichloromethane is flammable when exposed to high heat in an open flame, and can emit highly toxic phosgene when heated. The internal pressure increases, there is a risk of cracking and explosion, direct discharge will cause harm to the human body and pollute the surrounding environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for treating dichloromethane-containing wastewater
  • Device and method for treating dichloromethane-containing wastewater
  • Device and method for treating dichloromethane-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A treatment method for waste water containing dichloromethane, comprising the following steps:

[0034] A. Eliminate large impurities: Artificial grids are used to filter impurities, and the gap between the grids is generally 20mm.

[0035] B. Oil separation adjustment: Wastewater enters the oil separation adjustment tank to separate water and oil, and the design flow rate is Q=5m 3 / h, water velocity v=2mm / s, oil removal rate is 40%.

[0036] C. Sedimentation: Add flocculants to the sedimentation tank to destroy the colloidal stability in the wastewater, form flocs, and remove part of the organic matter in the wastewater.

[0037] D. Hydrolytic acidification: Use anaerobic bacteria to hydrolyze, acidify and methanate organic matter, remove organic matter in wastewater, and facilitate subsequent aerobic treatment. Design flow Q=5m 3 / h, residence time t=10h, maximum ascending velocity v(max)=2.5m / h.

[0038] E. Biological oxidation: The contact oxidation process is u...

Embodiment 2

[0044] A treatment method for waste water containing dichloromethane, comprising the following steps:

[0045] A. Eliminate large impurities: Artificial grids are used to filter impurities, and the gap between the grids is generally 20mm.

[0046] B. Oil separation adjustment: Wastewater enters the oil separation adjustment tank to separate water and oil, and the design flow rate is Q=5m 3 / h, water velocity v=3mm / s, oil removal rate is 50%.

[0047] C. Sedimentation: Add flocculants to the sedimentation tank to destroy the colloidal stability in the wastewater, form flocs, and remove part of the organic matter in the wastewater.

[0048] D. Hydrolytic acidification: Use anaerobic bacteria to hydrolyze, acidify and methanate organic matter, remove organic matter in wastewater, and facilitate subsequent aerobic treatment. Design flow Q=5m 3 / h, residence time t=12h, maximum ascending velocity v(max)=2.5m / h.

[0049] E. Biological oxidation: The contact oxidation process is u...

Embodiment 3

[0055] A treatment method for waste water containing dichloromethane, comprising the following steps:

[0056] A. Eliminate large impurities: Artificial grids are used to filter impurities, and the gap between the grids is generally 20mm.

[0057] B. Oil separation adjustment: Wastewater enters the oil separation adjustment tank to separate water and oil. The design flow Q=5m 3 / h, the water flow velocity v=2mm / s, and the oil removal rate is 40%.

[0058] C. Sedimentation: Add flocculants to the sedimentation tank to destroy the colloidal stability in the wastewater, form flocs, and remove part of the organic matter in the wastewater.

[0059] D. Hydrolytic acidification: Use anaerobic bacteria to hydrolyze, acidify and methanate organic matter, remove organic matter in wastewater, and facilitate subsequent aerobic treatment. Design flow Q=5m 3 / h, residence time t=12h, maximum ascending velocity v(max)=2.5m / h.

[0060] E. Biological oxidation: The contact oxidation process ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of wastewater treatment, particularly to a dichloromethane-containing wastewater treatment device and method. According to the device, an artificial grid is used for removing large impurities in wastewater; an oil separation tank is used for achieving the purpose of separation by utilizing different specific gravities of suspended matters and water in the wastewater; a flocculating agent can destroy the colloid steady state in the wastewater, form flocs and remove part of organic matters in the wastewater; then the wastewater enters a horizontal-flow air flotation machine to further remove SS; by using anaerobic bacteria, organic matters are hydrolyzed, acidified and methanated to remove the organic matters in the wastewater; a filler is arranged in a contact oxidation tank, microorganisms are partially fixed and partially suspended to form a biological membrane by an aeration method, sewage is contacted with the biological membrane on the filler, and the sewage is purified through biological degradation; and the principle that suspended impurity particles in a water flow can be separated from the water flow when the downward sedimentation speed is higher than the flowing speed of the water flow or the downward sedimentation time is shorter than the time when the water flow flows out of the sedimentation tank is utilized to realize water purification.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment device and method for wastewater containing dichloromethane. Background technique [0002] As we all know, with the development of manufacturing industry and society, the waste water produced also increases. The sources of waste water are production process waste water, ground flushing water, waste gas treatment facility drainage, domestic sewage, initial rainwater, etc. Waste water contains many toxic and harmful substances. According to different manufacturing products, the harmful substances contained in the discharged wastewater are also different. There is a kind of wastewater that mainly contains petroleum and methylene chloride. [0003] On October 27, 2017, the list of carcinogens released by the International Agency for Research on Cancer of the World Health Organization was initially compiled for reference. Dichloromethane was included in the li...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/40C02F1/52C02F3/30C02F9/00
Inventor 李双建王军颖姚明赵晓刚谢占领杨磊
Owner 安徽省巨仁环境技术有限公司