Unlock instant, AI-driven research and patent intelligence for your innovation.
Treatment method of liquid hydrocarbon alkali residue waste liquid
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of alkali residue waste liquid and treatment method, which is applied in chemical instruments and methods, refined hydrocarbon oil, sulfur preparation/purification, etc., can solve the problems of sewage treatment field impact, etc. and low operating costs
Active Publication Date: 2015-12-16
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, this method of processing alkali slag will eventually form high-salt alkali slag and neutralized water, which will still have an impact on the sewage treatment plant
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0028] The liquid hydrocarbon alkali slag waste liquid of an enterprise, in which the COD is 1.16×10 5 mg / L, the sulfide is 3.98×10 4 mg / L. use the invention figure 1 In the method shown, firstly, the refinery high-pressure gas is decompressed and SO 2 After mixing, acidify the alkali slag waste liquid, gas: SO 2 =1:5 (molar ratio), until the pH of the alkali slag waste liquid drops to 3. After acidification treatment, more than 99.5wt% of sulfides are removed.
[0029] The acidified tail gas produced by the acidification treatment enters the incinerator for incineration, producing SO 2 The incineration tail gas enters the sulfuric acid plant to produce sulfuric acid.
[0030] After acidification, the acidic waste liquid is left standing to recover the oil phase, and the COD removal rate can reach more than 90wt%.
[0031] Slaked lime is used to causticize and regenerate the waste liquid after recovering the oil phase to produce calcium sulfite precipitation, the remova...
Embodiment 2
[0034] Liquid hydrocarbon alkali residue waste liquid of an enterprise, in which COD is 1.35×10 5 mg / L, sulfide is 5.18×10 4 mg / L. use the invention figure 1 In the method shown, firstly, the refinery high-pressure gas is decompressed and SO 2 After mixing, acidify the alkali slag waste liquid, gas: SO 2 =1:2 (molar ratio), until the pH of the alkali slag waste liquid drops to 5. After acidification treatment, more than 99.7wt% of sulfides are removed.
[0035] The acidified tail gas produced by the acidification treatment enters the incinerator for incineration, producing SO 2 The tail gas is incinerated and then enters the sulfuric acid plant to produce sulfuric acid.
[0036] After acidification, the acidic waste liquid is left standing to recover the oil phase, and the COD removal rate can reach more than 93wt%.
[0037] Slaked lime is used to causticize and regenerate the waste liquid after recovering the oil phase to produce calcium sulfite precipitation, the remo...
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
Login to View More
Abstract
The invention discloses a treatment method of liquid hydrocarbon alkaline residue waste liquid. The method is as below: (1) acidifying liquid hydrocarbon alkaline residue waste liquid by gas and SO2 gas mixture, violating acidized tail gas with the increasing of acidification, and stopping the acidification when the pH value reaches 2-7; (2) burning acidified tail gas to generate burning tail gas, and supplementing oxygen or air to ensure full combustion; (3) introducing burning tail gas into a sulfuric acid production apparatus to produce sulfuric acid; (4) precipitating acidic waste liquid after acidification and recovering an oil phase; (5) after oil phase recovery, adding lime into the waste liquid for causticization regeneration, and separating out the precipitates to obtain regenerated alkali lye for oil alkali refining process. The invention can effectively remove sulfides in alkaline residue waste liquid, which is burned to produce sulfuric acid, effectively reduce COD and reclaim phenol; after causticization regeneration, the regenerated alkali lye can be used in the oil alkali refining process, so as to realize reclamation of the highly dangerous alkaline residue waste liquid hard for treatment and reduce the environment pollution.
Description
technical field [0001] The invention relates to a treatment method for alkali slag waste liquid, in particular to a treatment method for alkali slag waste liquid produced in the liquid hydrocarbon alkali refining process. Background technique [0002] During the alkali refining process of oil products in refineries, alkaline waste liquid containing high concentrations of pollutants will be produced, and the emissions of COD, sulfides and phenols account for more than 40wt% to 50wt% of the emissions of such pollutants in refineries. It is mainly composed of atmospheric diesel soda slag, catalytic gasoline soda slag, catalytic diesel soda slag, liquid hydrocarbon soda slag, etc. If the alkali residue waste liquid is discharged directly, it will seriously pollute the environment. If it is sent to the sewage treatment plant, it will seriously affect the normal operation of the sewage treatment plant, making it difficult to discharge the sewage up to the standard, and severely co...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More