CN103102933A - Electric desalting, dewatering and deslagging method for coal tar - Google Patents
Electric desalting, dewatering and deslagging method for coal tar Download PDFInfo
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- CN103102933A CN103102933A CN 201110371877 CN201110371877A CN103102933A CN 103102933 A CN103102933 A CN 103102933A CN 201110371877 CN201110371877 CN 201110371877 CN 201110371877 A CN201110371877 A CN 201110371877A CN 103102933 A CN103102933 A CN 103102933A
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- coal tar
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Abstract
The invention discloses an electric desalting, dewatering and deslagging method for coal tar, which is suitable for deep desalting, dewatering and impurity-removing treatment of high-temperature coal tar, medium-temperature coal tar and low-temperature coal tar. The method comprises the following steps: adding a sodium carbonate solution with the concentration of 5%-10% into the coal tar, increasing the temperature to 100-120 DEG C to form a stable sodium salt, filtering the coal tar twice, enabling the particle size of mechanical impurities to be not more than 15 mu m, heating the coal tar to 110 DEG C-150 DEG C and injecting water accounting for 5%-10% of the total weight of the coal tar, wherein the water is of softened water or purified water with the pH value of 5-11; and adding an emulsion breaking agent accounting for 0-100 mu g/g of the total weight of the coal tar, mixing, and then performing desalting, dewatering and deslagging in a high-voltage electric field to get the purified coal tar meeting the follow-up processing requirements.
Description
Technical field
The invention belongs to the preconditioning technique field of coal tar deep processing, particularly a kind of for the coal tar electric desalting, dewater, take off the slag method, can be widely used in the coal tar pre-treatment of the enterprises such as Coal Chemical Industry.
Technical background
The crude oil of having verified at present is probably 10,000 1,500 hundred million barrels.Although this fisherman's weight than the first two years has increased by 10%, but calculate with present recovery rate, tellurian prospective oil only enough satisfied whole world oil consumption needs 41 years, and petroleum resources are shortage day by day, had become one of key factor that restricts China's Economic development.And the storage capacity of coal is very abundant, so the coal liquefaction is a kind of approach that solves the vehicle fuel oil product, comprised the indirect liquefaction of coal direct liquefaction and coal etc. by the major technique of coal liquefaction, but these technical costss is high, technical sophistication.Another produces the technology of coke, by-product coal tar when producing coke.
Coal tar be coal be to heat up in a steamer with gasification in the liquid product that obtains.Pyrolysis temperature can obtain semi coking tar at 450～600 ℃; Pyrolysis temperature obtains middle temperature tar at 700～900 ℃; The pyrolysis temperature of high temperature tar is 1000 ℃ of left and right.
At present in coal tar, account for 80%, 20% from producer gas generator and coke making by indigenous methods from the high temperature tar of coking, belong to semi coking tar.Owing to containing a large amount of ammoniacal liquor, salt and solid impurity in coal tar, the existence of ammoniacal liquor, ammonium salt also can make tarry cut and steeping in water for reconstitution lactogenesis, can resolve into free acid and ammonia, cause the heavy corrosion of pipeline and equipment, solid impurity is mainly fine breeze, coke powder and carbon powder etc., therefore these solid impurities meeting blocking pipes needed coal tar is carried out purifying treatment before coal tar deep processing.The main thermosol filtration of traditional pretreatment process, solvent extraction, settlement separate, distillation separation method.Utilize the single requirement that is difficult to reach, adopt extraction to filter to combine with electrodesalting and electrodehydrating to play and remove preferably solid impurity, Yan Heshui.
Summary of the invention
Problem to be solved by this invention is to have designed a kind of coal tar electrodesalting and electrodehydrating to take off the slag method, is fit to the processing of the advanced desalination dehydrating and removing impurities of coal-tar heavy oil, coal-tar middle oil and coalite tar.The technical process that the present invention mainly adopts is: add concentration 5%～10% sodium carbonate solution in pending coal tar, fully mix, integral body is warming up to 100～120 ℃, after stable sodium salt to be formed, coal tar is carried out twice filtration, guarantee that its mechanical impurity particle diameter is not more than 15 μ m, coal tar after filtering is continued to be warmed up to 110 ℃～150 ℃, and inject the water that accounts for coal tar gross weight 5%～10%, injection water quality is that the pH value is 5～11 softening waters or purifies waste water; Inject the emulsion splitter of 0～100 μ g/g, after mixing, enter at last electric desalting equipment, carry out desalination under the effect of high-voltage electric field, dewater, take off slag, finally be met the purification coal tar that following process requires.With general crude oil electric desalting equipment, the part difference is arranged in the electric field design part of electric desalting equipment due to the proportion characteristic (coal tar density＞water-mass density) of coal tar, the Intensity Design of electric desalting equipment inner high voltage electric field is 500～2000V/cm, frequency is 50～5000 hertz, electric field stopped 30～90 minutes, and the Electrode Position Design is in the tank body middle and lower part.
Remarkable advantage
The present invention adopts sedimentation, filtration, high-voltage electric field coal tar to be taken off the technology of slag desalination, dehydration separation, be fit to various density greater than the desalination of coal-tar heavy oil, coal-tar middle oil and the coalite tar of 1000Kg/m3, dewater and take off slag carry out fast, avoid adopting a large amount of gasification latent heats of distillation method dehydration consumption, saved facility investment and energy consumption.
Specific embodiment
Qitaihe coal tar is processed by content technical process of the present invention: in crude oil storage tank, Qitaihe coal tar is carried out pre-heating temperature elevation to 110 ℃, add 8% sodium carbonate solution, mix output through crude oil pump, water filling 6% and emulsion splitter 30ppm before static mixer, simultaneous temperature rises to 145 ℃ and enters electric desalting equipment, after 90 minutes process, carry out sampling analysis.Coal tar after processing all satisfies the further requirement of processing at indices such as its ash content, moisture, saliferous.
Claims (7)
1. a coal tar electric desalting, the method for dewatering, taking off slag, its technical process is: add sodium carbonate solution in pending coal tar, fully mix and the heat exchange intensification, coal tar after the filtration of after stable sodium salt to be formed, coal tar being carried out twice mechanical impurity will be filtered continues to heat up, and carry out water filling and emulsion splitter on pipeline, after static mixer mixes, enter at last electric desalting, dehydration equipment, carry out desalination under the effect of high-voltage electric field, dewater, take off slag.
2. a kind of coal tar electrodesalting and electrodehydrating according to claim 1 takes off the slag method, it is characterized in that: the sodium carbonate solution concentration that adds in coal tar is 5%～10%, and abundant mixed temperature rises to 100～120 ℃.
3. a kind of coal tar electrodesalting and electrodehydrating according to claim 1 takes off the slag method, it is characterized in that carrying out coal tar after twice filtration, and the mechanical impurity particle diameter is not more than 15 μ m.
4. a kind of coal tar electrodesalting and electrodehydrating according to claim 1 takes off the slag method, and the coal tar temperature after it is characterized in that filtering is elevated to 110 ℃～150 ℃, and water injection rate is 5%～10%, and the emulsion splitter injection rate is 0～100 μ g/g.
5. a kind of coal tar electrodesalting and electrodehydrating according to claim 1 takes off the slag method, and the mixture strength of it is characterized in that water filling, annotating the static mixer after emulsion splitter is 40～100Kpa.
6. a kind of coal tar electrodesalting and electrodehydrating according to claim 1 takes off the slag method, the intensity that it is characterized in that electric desalting equipment inner high voltage electric field is 500～2000V/cm, frequency is 50～5000 hertz, and electric field stopped 30～90 minutes, and the Electrode Position Design is in the tank body middle and lower part.
7. a kind of coal tar electrodesalting and electrodehydrating according to claim 1 takes off the slag method, it is characterized in that injection water quality is that the pH value is 5～11 softening waters or purifies waste water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110371877 CN103102933A (en) | 2011-11-09 | 2011-11-09 | Electric desalting, dewatering and deslagging method for coal tar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110371877 CN103102933A (en) | 2011-11-09 | 2011-11-09 | Electric desalting, dewatering and deslagging method for coal tar |
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| CN103102933A true CN103102933A (en) | 2013-05-15 |
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| CN 201110371877 Pending CN103102933A (en) | 2011-11-09 | 2011-11-09 | Electric desalting, dewatering and deslagging method for coal tar |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104974775A (en) * | 2015-05-22 | 2015-10-14 | 中石寰球（北京）工程管理咨询有限公司 | Desalination purification method for coal tar |
| CN105295989A (en) * | 2015-11-27 | 2016-02-03 | 煤炭科学技术研究院有限公司 | Dehydrating and desalinizing method of high-temperature coal tar |
| CN105316018A (en) * | 2014-08-02 | 2016-02-10 | 长江(扬中)电脱盐设备有限公司 | Pretreatment method for deep processing of coal tar |
| CN105713658A (en) * | 2014-08-11 | 2016-06-29 | 中石化洛阳工程有限公司 | Low-temperature coal tar pretreatment technology |
| CN105802650A (en) * | 2016-06-01 | 2016-07-27 | 中石化炼化工程（集团）股份有限公司 | High-temperature coal tar dewatering method and high-temperature coal tar dewatering device |
| CN109097085A (en) * | 2017-06-20 | 2018-12-28 | 中国石油化工股份有限公司 | The pretreated method of coal tar |
-
2011
- 2011-11-09 CN CN 201110371877 patent/CN103102933A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105316018A (en) * | 2014-08-02 | 2016-02-10 | 长江(扬中)电脱盐设备有限公司 | Pretreatment method for deep processing of coal tar |
| CN105316018B (en) * | 2014-08-02 | 2017-12-19 | 长江(扬中)电脱盐设备有限公司 | A kind of coal tar deep processing preprocess method |
| CN105713658A (en) * | 2014-08-11 | 2016-06-29 | 中石化洛阳工程有限公司 | Low-temperature coal tar pretreatment technology |
| CN104974775A (en) * | 2015-05-22 | 2015-10-14 | 中石寰球（北京）工程管理咨询有限公司 | Desalination purification method for coal tar |
| CN105295989A (en) * | 2015-11-27 | 2016-02-03 | 煤炭科学技术研究院有限公司 | Dehydrating and desalinizing method of high-temperature coal tar |
| CN105802650A (en) * | 2016-06-01 | 2016-07-27 | 中石化炼化工程（集团）股份有限公司 | High-temperature coal tar dewatering method and high-temperature coal tar dewatering device |
| CN109097085A (en) * | 2017-06-20 | 2018-12-28 | 中国石油化工股份有限公司 | The pretreated method of coal tar |
| CN109097085B (en) * | 2017-06-20 | 2021-11-16 | 中国石油化工股份有限公司 | Coal tar pretreatment method |
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Application publication date: 20130515 |