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A pretreatment system and method for the production of non-corrosive and sodium-free asphalt

A pretreatment, non-corrosion technology, applied in the processing of tar pitch/petroleum pitch/natural pitch, tar processing, petroleum industry, etc., it can solve the problems of difficult tank turnover, incomplete drainage, poor oil-water mixing effect, etc.

Active Publication Date: 2018-06-08
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method adopts an intermittent washing process, and the stirring or beating cycle takes a long time. From feeding, adding water, heating, beating cycle, standing still to draining the water, it takes at least 7 days to process a tank, which has high requirements for inventory. , the tank turnover is difficult; the timing of adding waste water is before or during the tar cycle, and the oil-water mixing effect is poor; using artificial methods to release water is not only labor-intensive, but also incomplete, which affects the treatment effect
The application of intermittent water washing process takes a long time, consumes a lot of energy, and is labor-intensive, which cannot meet the needs of continuous production of asphalt

Method used

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  • A pretreatment system and method for the production of non-corrosive and sodium-free asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The tar was received in the raw material tank 1, and its Cl concentration was 20.0 μg / g, and its Na concentration was 9.8 μg / g. The tar was heated to 60°C while receiving the tar. Wastewater tank 2 stock up to 50m 3 , open the relevant valves, start the tar pump 5 and the waste water metering pump 3, the tar passes through the pipeline a, and the waste water passes through the pipeline b respectively through the first check valve 4 and the third check valve 4 "according to the oil-water weight ratio of 12:1 in static Mix in the mixer 6, enter the first feed distributor 7 in the middle of the separator 8 through the pipeline c, and continue to heat the tank to 80 ° C. After the tar has a residence time of about 6 hours, the upper layer of separated water is discharged from the lifting automatic drainage cylinder 9 is discharged, and enters the first ammonia water tank 10 through pipeline d, and ammonia water intermittently sends coal essence residual ammonia water; Afte...

Embodiment 2

[0057] The tar was received in the raw material tank 1, and its Cl concentration was 30.5 μg / g, and its Na concentration was 14.9 μg / g. The tar was heated to 65°C while receiving the tar. Wastewater tank 2 stock up to 100m 3 , open the relevant valves, start the tar pump 5 and the waste water metering pump 3, the tar passes through the pipeline a, and the waste water passes through the pipeline b respectively through the first check valve 4 and the third check valve 4 "according to the oil-water weight ratio of 10:1 in static Mix in the mixer 6, enter the first feed distributor 7 in the middle of the separator 8 through the pipeline c, and continue to heat the tank to 85 ° C. After the tar has a residence time of about 10 hours, the upper layer of separated water is discharged from the lifting automatic drainage cylinder 9 is discharged, and enters the first ammonia water tank 10 through pipeline d, and ammonia water intermittently sends coal essence to circulate ammonia wate...

Embodiment 3

[0059] The tar was received in the raw material tank 8, and its Cl concentration was 40.2 μg / g, and its Na concentration was 16.7 μg / g. Heat the tar to 75°C before washing in boiling water. Wastewater tank 2 stock up to 150m 3, open the relevant valves, start the tar pump 5 and the waste water metering pump 3, the tar passes through the pipeline a', and the waste water passes through the pipeline b respectively through the second check valve 4' and the third check valve 4 "according to the oil-water weight ratio of 8:1 Mix in the static mixer 6, enter the second feed distributor 7' in the middle part of the separator 1 through the pipeline c', and continue to heat to 90 ° C in the tank. After the tar is through the residence time of about 30h, the upper layer of separated water can be The lifting automatic drainage cylinder 9 is discharged, and enters the second ammonia water tank 10' through the pipeline d', and the ammonia water is intermittently sent to the coal essence ci...

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Abstract

The invention provides a pretreatment system and method for the production of non-corrosive and sodium-free asphalt. The pretreatment system includes a raw material tank and a waste water tank for receiving tar; the raw material tank is connected with the inlet of a static mixer, and the waste water tank is also connected with the static mixer The inlet of the static mixer is connected, and the outlet of the static mixer is connected with the feed distributor for dispersing. The feed distributor is set in the middle of the separator; there is also an automatic drainage device inside the separator, and the automatic drainage device is connected with the ammonia water tank. ; Connected to the centrifuge at the bottom of the separator. The present invention removes most of the inorganic chlorine in the tar through the continuous water washing desalting process, so as to realize tar processing without adding alkali, control the inorganic chlorine content in the naphthalene oil section within the safe concentration range, and achieve the basic sodium-free asphalt product obtained by distillation ions; adopt continuous feeding and adding water, mix evenly, and have good washing effect and high efficiency; adopt automatic drainage device, which greatly reduces the labor force.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a pretreatment system and method for producing non-corrosive and sodium-free asphalt. Background technique [0002] The impurity elements in the pitch directly affect the quality of the anode, and then affect the behavior of the anode in the electrolytic cell and the quality of the aluminum liquid. Na is thought to affect CO 2 The most reactive element not only increases the carbon consumption, but also causes the anode to be prone to slag and block accidents, which is the so-called sodium sensitivity. [0003] The concentration of Cl in the naphthalene oil section is as high as 50-800 μg / g when the tar is distilled without adding alkali. In order to reduce the intergranular corrosion, stress corrosion, and overall corrosion of the distillation equipment caused by Cl ions, Na is usually added to the raw tar 2 CO 3 Decompose the fixed ammonium salt, neutralize...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/00C10C3/00
Inventor 杜亚平刘明勇邵忠平
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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