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Coal tar electric desalination and dehydration system and method

A technology for electric desalination and dehydration and coal tar, which is applied in the fields of hydrocarbon oil dehydration/demulsification, electricity/magnetic dehydration/demulsification, and treatment of hydrocarbon oil, etc. Tar desalination and other issues

Active Publication Date: 2019-11-19
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the electric desalination technology of coal tar generally adopts the electric desalination technology of crude oil. Step 1, use an electric field to demulsify the oil-water emulsion of the coal tar to be treated; Gravity separation; step 3, apply an electrostatic field to the coal tar after gravity separation, and discharge the water and sand separated from the coal tar respectively; however, there are huge differences in the source, nature and composition of coal tar and crude oil, for example, crude oil The density is generally lower than that of water, and the source and composition are relatively stable. As long as the raw materials remain unchanged, the conditions of electric desalination temperature, pressure, demulsifier, etc. will remain stable; while the composition of coal tar is complex, and the properties of different batches of coal tar vary greatly , crude oil electric desalting equipment cannot meet the needs of coal tar desalination with large differences in properties
Moreover, coal tar is generally divided into high-temperature coal tar and medium-low temperature coal tar according to the coking temperature. Close, the single electric desalting electric field structure of crude oil electric desalting equipment is difficult to meet all coal tar desalting and dehydration processes, and the electric desalting effect is poor

Method used

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  • Coal tar electric desalination and dehydration system and method
  • Coal tar electric desalination and dehydration system and method
  • Coal tar electric desalination and dehydration system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, an embodiment of the present invention proposes a coal tar electric desalination and dehydration system, which includes: an emulsification and demulsification device 10, a first electric desalination and dehydration device and a second electric desalination and dehydration device.

[0044] The first electric desalination and dehydration device includes a first electric desalination tank 21 and a first oil-water separator 22. The first electric desalination tank 21 has a first group of electrodes that generate an electric field. The top of the first electric desalination tank There is a first outlet, the bottom of the first electric desalination tank has a second outlet, the inlet of the first electric desalination tank can communicate with the demulsification outlet of the emulsification and demulsification device, and the first electric desalination tank The second outlet of 21 can communicate with the inlet of the first oil-water separator 2...

Embodiment 2

[0063] The coal tar electric desalination and dehydration method provided by the embodiment of the present invention can adopt the coal tar electric desalination and dehydration system in the above-mentioned embodiment 1, and the coal tar electric desalination and dehydration method firstly divides a batch of coal tar to be desalted and dehydrated according to the density Classify and adopt different treatment processes according to different types of coal tar. Methods include:

[0064] Measure the density of coal tar to be desalted and dehydrated, and judge the density of coal tar to be desalted and dehydrated and the density of water;

[0065] In density measurement, the density of coal tar to be desalted and dehydrated can be measured according to the method stipulated in the current petrochemical industry standard SH / T0604-2000, and the density value of water is selected to be the density value corresponding to the temperature at which the density of coal tar to be desalte...

Embodiment example 1

[0080] Raw material coal tar (to be desalted and dehydrated coal tar) density 1182.1kg / m 3 , carrying out emulsification and demulsification treatment on the coal tar to be desalted and dehydrated successively through the emulsification and demulsification device, and carrying out the second electric desalination treatment process through the second electric desalination and dehydration device. Weigh 100g of coal tar and 10g of deionized water and preheat them to 50°C, cut for 2 minutes at a high-shear mixing emulsifier at 5000rpm, add a demulsifier accounting for 30μg / g of the total weight of coal tar, mix well, and inject the second electric desalination Tank, set electric field conditions: field strength 700V / cm, temperature 140°C, time 30min for electric desalination.

[0081] Salt content in oil before and after desalting:

[0082]

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Abstract

The invention relates to an electric desalting and dewatering system and method for coal tar, relates to the technical field of coal tar treatment and is intended to conveniently meet coal tar desalting and dewatering processes. A technical scheme mainly used herein is characterized in that the electric desalting and dewatering system and method for coal tar comprises an emulsifying and demulsifying device, a first electric desalting and dewatering device, and a second electric desalting and dewatering device; the first electric desalting and dewatering device comprises a first electric desalting and a first oil-water separator; the second electric desalting and dewatering device comprises a second electric desalting tank, and a second oil-water separator. Compared with the prior art, the system and method allow one batch of coal bar to be desalted and dewatered is first classified according to densities, and employ different treating processes according to the different types of coal bar.

Description

technical field [0001] The invention relates to the technical field of coal tar treatment, in particular to a coal tar electric desalination and dehydration system and method. Background technique [0002] Coal tar is a complex mixture of aromatic hydrocarbons produced during the carbonization and gasification of coal. Among them, coal tar contains more salts, such as chloride ion salt and sulfur ion, which will cause serious corrosion to process equipment and pipelines. Therefore, it is necessary to remove the salt substances in the coal tar. [0003] At present, the electric desalination technology of coal tar generally adopts the electric desalination technology of crude oil. Step 1, use an electric field to demulsify the oil-water emulsion of the coal tar to be treated; Gravity separation; step 3, apply an electrostatic field to the coal tar after gravity separation, and discharge the water and sand separated from the coal tar respectively; however, there are huge diff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/00C10G32/02C10G33/02
CPCC10G32/02C10G33/00C10G33/02C10G2300/1037C10G2300/202
Inventor 常秋连李培霖毛学锋赵渊马博文
Owner CCTEG CHINA COAL RES INST