Coal chemical wastewater and co 2 Hybrid Injection Method for Subsurface Storage
A technology for coal chemical wastewater and CO2, applied in chemical process analysis/design, computational theoretical chemistry, instruments, etc., can solve the problems of turbid water quality, high cost, difficult to meet national emission standards, etc., to reduce CO2 emissions, environmental protection low-harm effect
Inactive Publication Date: 2021-06-11
NORTHWEST UNIV
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, with the rapid development of my country's coal chemical industry, some problems existing in coal chemical enterprises need to be paid enough attention to. For example, coal chemical wastewater contains a large amount of ammonia nitrogen, phenols, organic pollutants, cyanide and grease, and the water quality is turbid and discolored. The concentration is as high as several thousand times, the treatment is difficult, the cost is high, and it is difficult to meet the national emission standards; the coal chemical industry is also a CO 2 Large emitters, it is estimated that the annual CO emissions 2 up to 0.5Gt, CO 2 The sharp increase in emissions will cause serious environmental and climate change problems
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0063] (1) The total annual wastewater discharge of a coal-to-methanol plant with an annual output of 300,000 tons is 1.971 million tons, and the CO of the syngas unit 2 The discharge volume is 215,600 tons, and the ammonia nitrogen content in the wastewater [NH 4 + ] is 300mg·L -1 , total phenol content [C 6 h 5 OH] t 1200mg·L -1 .
[0064] (2) CO in wastewater 2 Calculation of Total Absorption
[0065] Such as figure 1 Shown, wastewater and CO 2 After mixing, the reaction in the mixed system is as follows:
[0066] ①Wastewater and CO 2 Reactions that exist during dissolution
[0067] Dissolution balance:
[0068]
[0069] Ionization balance:
[0070]
[0071]
[0072]
[0073]
[0074] Equilibrium response:
[0075]
[0076]
[0077] Non-equilibrium response:
[0078]
[0079] CO 2 The dissolution equilibrium (1) in wastewater is expressed by Henry's law:
[0080]
[0081] In the formula: P represents the operating pressure of the...
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 kind of coal chemical industry waste water and CO 2 A method of mixing and injecting into underground storage. This method first detects the total content of ammonia nitrogen and phenol in the wastewater, and then uses a mathematical model to calculate the amount of CO in the wastewater. 2 The relationship between total absorption and injection depth, according to CO 2 The relationship between the total absorption amount and the injection depth is used to obtain the optimal storage depth, and the waste water and CO 2 The operating conditions of the dissolution process, and finally inject the mixed solution into the formation at the optimum depth for storage. The present invention is based on CO 2 The reaction with coal chemical wastewater, using the thermodynamic-chemical potential equilibrium model, Kent-Eisenberg reaction model, reactant balance relationship, material balance and charge balance, the wastewater and CO 2 The relationship between the absorption amount and the optimal storage depth, so as to provide the coal chemical industry wastewater and CO 2 The treatment of provides a new method, which can not only greatly reduce 2 The amount of discharge has also enabled the wastewater of coal chemical enterprises to be well treated, thereby achieving zero discharge in the true sense.
Description
technical field [0001] The invention belongs to the field of chemical engineering and technology, and specifically relates to a method for combining a large amount of refractory wastewater discharged from coal chemical industry with CO 2 The method of injecting into underground storage after mixing. Background technique [0002] my country is a country rich in coal but lacking in oil and gas. It is an inevitable trend for the development of my country's chemical industry to vigorously develop the coal chemical industry. However, with the rapid development of my country's coal chemical industry, some problems existing in coal chemical enterprises need to be paid enough attention to. For example, coal chemical wastewater contains a large amount of ammonia nitrogen, phenols, organic pollutants, cyanide and grease, and the water quality is turbid and discolored. The concentration is as high as several thousand times, the treatment is difficult, the cost is high, and it is diffic...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/10G16C10/00
CPCG16C20/10
Inventor 吴乐王玉琪郑岚韩小龙
Owner NORTHWEST UNIV