A method for desalting and purifying coal tar
A coal tar and desalination technology, which is applied in tar processing, tar processing through distillation, and tar processing through chemical extraction, can solve problems such as unsatisfactory treatment effect of desalination process, and achieve significant impurity removal effect, cost saving, The effect of improving desalination efficiency
Active Publication Date: 2020-11-20
JIANGSU HUDA CHEM TECH CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the treatment effect of existing desalination process is not satisfactory, because the mechanism of demulsification and electric desalination of above-water coal tar and underwater coal tar are different, the existing technology cannot treat coal tar raw materials with different densities (above-water coal tar and underwater coal tar) at the same time. coal tar) for pretreatment to co-enter the hydrogenation reactor
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
[0043] Taking coal tar desalination and purification treatment in ** plant as an example, the purification effect of the purification method of the present invention is illustrated. The process flow chart is as figure 1 shown.
[0044] A method for desalting and purifying coal tar, comprising:
[0045] 1) Two kinds of coal tar raw materials with different densities are filtered separately and left to stand to obtain the above-water oil and the underwater oil;
[0046] 2) The oil on the water is pumped to a type I electric desalting tank for electric desalination treatment; the underwater oil is pumped to a type II electric desalting tank for electric desalination treatment;
[0047] Among them, compound demulsifier, corrosion inhibitor, decalcifier, metal complexing agent and fresh water are added to type I electric desalination tank;
[0048] The compound demulsifier based on ZDL II demulsifier is added to the type II electric desalting tank, as well as the same corrosion ...
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 relates to a desalination purification method for coal tar. The method comprises the following steps: respectively filtering two coal tar raw materials with different density, and carrying out standing so as to obtain oil on water and oil under water; pumping the oil on water to a I type electrical desalter and carrying out electric desalting treatment; pumping the oil under water to a II type electrical desalter and carrying out electric desalting treatment; and mixing the treated oil on water and the oil under water and then allowing the obtained mixture to enter a dehydrating tower, and removing the water in the coal tar by flashing and then carrying out hydrogenation process. With the method provided by the invention, the incapability of simultaneously treating demulsification process of the coal tar on water and the coal tar under water of conventional raw material pretreatment is overcome; according to the invention, the coal tar on water and the coal tar under water are respectively added with different demulsification agents and same corrosion inhibitors, decalcifying agents and metal complexing agents and then enter different electrical desalters, so salts and impurities in the coal tar are effectively removed, and the requirements for pretreating and mixing two raw materials and then entering a hydrogenation device are realized.
Description
technical field [0001] The invention relates to a method for desalting and purifying coal tar raw materials with different densities (water oil and underwater oil), and belongs to the technical field of pretreatment of coal tar deep processing. Background technique [0002] Coal tar raw materials often contain salt (mainly chloride) and water (soluble in oil or in an emulsified state), which can cause corrosion of equipment, scaling on the inner wall of equipment and affect the composition of finished oil. Coal tar electrolysis is required before processing. Desalination treatment, its main functions are: remove chlorides, reduce the amount of chlorides; reduce corrosion of equipment; remove some metal impurities, prolong the service life of catalysts, reduce catalyst consumption; reduce impurities such as ash in coal tar, improve Product quality; a large amount of water is removed, which reduces the energy consumption and heat load of coal tar during processing. [0003] T...
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): C10C1/00C10C1/06C10C1/20
CPCC10C1/005C10C1/06C10C1/205
Inventor 张婉秋沈彦梅林立兵
Owner JIANGSU HUDA CHEM TECH CO LTD