Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Liquefied gas alkali dreg wastewater treatment method

A technology of alkali residue waste liquid and treatment method, applied in chemical instruments and methods, special compound water treatment, reflux water treatment and other directions, can solve the problems of high operating cost, large area and high equipment investment, and achieve low operating cost. , Small footprint, simple process effect

Active Publication Date: 2018-07-31
大连理工环境工程设计研究院有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, refining and chemical plants use more alkali washing waste liquid treatment methods, including concentrated sulfuric acid neutralization, acid wastewater in refinery plants, high temperature wet oxidation, calcination and recovery of caustic soda or sodium bicarbonate, etc. There are also units that specialize in the recovery and treatment of alkali slag , the processing cost is about 2000-5000 yuan / ton
Therefore, the manpower and cost invested in the treatment of liquefied gas alkali slag are quite large every year.
In addition, the conventional treatment methods in the treatment of alkali slag include incineration, catalytic oxidation, wet oxidation, etc., due to potential disadvantages such as secondary pollution, high equipment investment, high operating costs, and large floor area, engineering applications subject to certain restrictions

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A treatment method for liquefied gas alkali slag waste liquid, the steps are as follows:

[0023] a) Pass the liquefied gas alkali residue waste water into the oil separation tank, under the action of gravity, the light oil floats up and the heavy oil sinks; after removing the floating light oil and sinking heavy oil, the deoiled liquefied gas is obtained Alkali slag wastewater; wherein, the hydraulic retention time of liquefied gas alkali slag wastewater in the oil separation tank is 3h, and the falling speed is 0.5mm / s;

[0024] B) start the micro-electrolysis reactor (ME) that is provided with electrode plate, under the effect of electrochemistry, the liquefied gas alkali slag waste water after oil removal is passed into the micro-electrolysis reactor to process, obtains the waste water after treatment;

[0025] The effective voltage between the plates during the operation of the micro-electrolysis reactor is 0.3V / cm;

[0026] The electrode plates are completely fil...

Embodiment 2

[0037] A treatment method for liquefied gas alkali slag waste liquid, the steps are as follows:

[0038] a) Pass the liquefied gas alkali residue waste water into the oil separation tank, under the action of gravity, the light oil floats up and the heavy oil sinks; after removing the floating light oil and sinking heavy oil, the deoiled liquefied gas is obtained Alkali slag wastewater; wherein, the hydraulic retention time of liquefied gas alkali slag wastewater in the oil trap is 4h, and the falling speed is 0.8mm / s;

[0039] B) start the micro-electrolysis reactor (ME) that is provided with electrode plate, under the effect of electrochemistry, the liquefied gas alkali slag waste water after oil removal is passed into the micro-electrolysis reactor to process, obtains the waste water after treatment;

[0040] The effective voltage between the plates during the operation of the micro-electrolysis reactor is 1V / cm;

[0041] The electrode plates are completely filled with func...

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 belongs to the technical field of wastewater treatment, and discloses a liquefied gas alkali dreg wastewater treatment method. The main technology adopts a microelectrolysis reactor andan efficient bioreactor. The method comprises the following steps that 1, liquefied gas alkali dreg wastewater is pumped into a skimming tank; 2, the microelectrolysis reactor provided with a plate electrode is turned on, under the electrochemical effect, pretreated wastewater is introduced into the microelectrolysis reactor to be treated, and treated wastewater is obtained; 3, electrolysis effluent is diluted until the salinity is about 20,000 mg / L, and then phosphoric acid is used for adjusting the pH of wastewater to 10-11; 4, neutralized alkaline residues are pumped into the bioreactor, and after efficient halotolerant bacteria biochemical treatment, treated wastewater is obtained. According to the efficient and energy-saving alkali dreg wastewater treatment method, the whole process is executed under normal temperature and pressure, the technology is simple, and the integrated equipment is obtained. According to the method, the COD of the liquefied gas alkali dreg wastewater is lowered to 1,000 mg / L.

Description

technical field [0001] The invention relates to a treatment method of alkali slag waste liquid, in particular to a treatment method of alkali slag waste liquid produced in the refining process of liquefied gas. Background technique [0002] Liquefied gas needs to be desulfurized during the refining process. Generally, coking liquefied gas needs to go through two processes: amine elution of hydrogen sulfide and alkali elution of mercaptan. Alkali washing waste liquid contains different concentrations of free alkali, neutral oil and naphthenic acid, and also contains a large amount of sodium sulfide, mercaptan, thioether, creosote and other substances, which has the characteristics of deep color, stench and strong corrosion. Be included in the "National List of Hazardous Substances" (No.: HW35). [0003] At present, refining and chemical plants use more alkali washing waste liquid treatment methods, including concentrated sulfuric acid neutralization, acid wastewater in refin...

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
CPCC02F1/40C02F1/46104C02F1/66C02F3/30C02F3/34C02F9/00C02F2001/46152C02F2201/46105C02F2301/04C02F2301/08C02F2305/06
Inventor 许传坤周集体许芳涤刘雄才冯清党李玉明王国栋娄宏松
Owner 大连理工环境工程设计研究院有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com