CN102241421B - Method for removing dissolved gases from carbon black water - Google Patents
Method for removing dissolved gases from carbon black water Download PDFInfo
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- CN102241421B CN102241421B CN201010173185.8A CN201010173185A CN102241421B CN 102241421 B CN102241421 B CN 102241421B CN 201010173185 A CN201010173185 A CN 201010173185A CN 102241421 B CN102241421 B CN 102241421B
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Abstract
The invention relates to a method for removing dissolved gases from carbon black water. The method is characterized by using the concentration exhaust gas generated by a concentration device during an acetylene preparation process utilizing partial oxidation of natural gas as the stripping gas for removing dissolved gases from carbon black water, and is performed by firstly reducing the pressure of the concentration exhaust gas to less than 13.5 kPa and adjusting the flow to 150-300 m<3>/h, then introducing the concentration exhaust gas into a carbon black water tank for removing the dissolved gases from the carbon black water, and returning the removed gases to the concentration device through a cracking gas main pipe. In the method, the concentration exhaust gas generated by the concentration device is selected as the stripping gas, the influence on the whole process is minimized and the operation cost of the overall device is lowered; a quick closing valve under pressure interlock control is arranged to cut off the high-pressure exhaust gas entering a degassing tank, a safety valve is simultaneously arranged to empty part of the concentration exhaust gas to a torch for burning, thus guaranteeing safe, stable and long-term operation of the method; the emission of combustible gases to the environment is reduced, thus contributes to environmental protection; and economic benefits are improved by recycling acetylene.
Description
Technical field
The present invention relates to the carbon black water treatment process that gas by partial oxidation of natural acetylene technique processed produces, be specifically related to a kind of method that removes dissolved gases from carbon black water.
Background technology
In gas by partial oxidation of natural acetylene technique processed, the solution gas in carbon black water carries out the nature desorb in degassing vessel, so desorption effect is poor, is partly dissolved gas and is brought to downstream unit and causes environmental pollution, brings potential safety hazard.Therefore, about the problem that removes of dissolved gases from carbon black water, study, discuss as an important problem always, and find the method solved.Contain part acetylene in carbon black water due to partial oxidation reactor, electric separator, the discharge of cooling tower bottom, and the solubleness of acetylene in water is quite large, is very important therefore how to make the acetylene that this strand of carbon black water only contains minimum.The rising of the solubility with temperature of acetylene in water and reducing.Reduce to minimum in order to make to discharge in water the acetylene loss, the temperature that should regulate carbon black water is approximately being emitted 84 ℃ the time.This strand of carbon black water gravitate, by collecting house steward, flow automatically in degassing vessel, and carbon black water is broken up by strainer, so that larger gas-liquid exchange area to be provided.Therefore, partly soluble gas is released.This discharges gas and is mainly acetylene, returns the reacted gas house steward via the safe water sealing groove and is sent to concentration unit.The safe water sealing groove can make reacted gas be unlikely and enter degassing vessel.Carbon black water must be degassed, in order to avoid disturb next step carbon black in the carbon black washing trough to separate.The bubble risen can make to be deposited in the carbon black on the water surface in washing trough and roll, and this can produce the carbon black airborne dust, causes environmental pollution; If excessive concentration, can cause danger to the operation of oxygen-making plant air separation plant.
Everybody also knows, in gas by partial oxidation of natural acetylene technique processed, the reacted gas that cracker produces enters concentration unit after compression, and the reacted gas in concentration unit absorbs by the selectivity of solvent the mixture that is separated into three kinds of gases: tail gas, product acetylene and higher alkyne gas.The concentrate tail gas of concentration unit is mainly carbon monoxide, hydrogen, methane, carbonic acid gas, ethene and nitrogen etc.
Summary of the invention
The purpose of this invention is to provide a kind of method that removes dissolved gases from carbon black water, the method can significantly improve the degasifying effect of degassing vessel, reduce inflammable gas in downstream unit and, to the quantity discharged of environment, alleviate environmental pollution, for safe, stable, the long-time running of whole device lays the foundation; And can reclaim acetylene, increase economic efficiency.
The object of the present invention is achieved like this: a kind of method that removes dissolved gases from carbon black water is characterized in that the stripping gas that the concentrate tail gas of concentration unit generation in gas by partial oxidation of natural acetylene technique processed is removed as dissolved gases from carbon black water.
A kind of method that removes dissolved gases from carbon black water, is characterized in that first the concentrate tail gas pressure reducing to 13.5KPa, flow is adjusted to 150～300m
3/ h, then pass in the carbon black water degassing vessel, the solution gas in carbon black water is removed to processing.
The present invention also is provided with a quick-closing valve by the pressure interlocked control and comes cut off high concentrate tail gas to enter degassing vessel, separately establishes a safety valve, and by tail gas emptying, to torch, this safe, stable, long-term operation to present method plays vital effect simultaneously.
A kind of method that removes dissolved gases from carbon black water of the present invention, concrete steps are as follows:
The first step, closing the concentrate tail gas that is positioned at concentration unit is the battery limit (BL) valve on the stripping gas pipeline; Close the concentrate tail gas inlet valve of degassing vessel; Utilize the nitrogen purging that pressure is 0.5MPa to collect house steward and degassing vessel;
Second step, open the path before the concentrate tail gas inlet valve of concentrate tail gas from the concentration unit to the degassing vessel, and open the empty valve of the first couple before concentrate tail gas inlet valve, to empty emission gases;
The 3rd step, open with leather hose and be connected to the empty valve of the second couple after the battery limit (BL) valve, the nitrogen that to introduce pressure be 0.5MPa;
The 4th step, open nitrogen, carry out inerting work by second pair of empty valve, and sampling analysis is qualified, and the analysis criterion of acceptability is O
2≤ 0.5%;
The 5th step, inerting is closed second pair of empty valve after finishing, and stops filling nitrogen;
The 6th step, open the battery limit (BL) valve, and open the reducing valve on the concentrate exhaust pipe, by pressure-controlling below 13.5KPa;
The 7th step, the flow control valve before the adjust flux meter, be adjusted to 150～300m by the flow of concentrate tail gas
3/ h;
The 8th step, after the flow adjustment of concentrate tail gas is stable, opens concentrate tail gas inlet valve qualified concentrate tail gas sent in degassing vessel, and open the safety-valve, by the emptying of part concentrate tail gas to torch burning.
Beneficial effect of the present invention:
(1) the concentrate tail gas that the present invention selects concentration unit to produce is as stripping gas.In this strand of gas of one side, the content of hydrogen and carbon monoxide is higher, accounts for more than 80%, and the solubleness of these two kinds of components in water is extremely low simultaneously.And the content of inflammable gas in concentrate tail gas such as the acetylene that meltage is larger in carbon black water, higher alkyne are almost nil, therefore the concentrate tail gas of concentration unit can meet the requirement that increases the gas dissolved desorb fully; The concentrate tail gas that uses on the other hand concentration unit is the minimum that affects on whole technique as stripping gas, has also reduced the running cost of whole device.
(2) because the present invention implements on the cracker higher at danger coefficient, the medium that whole device contacts is all inflammable, explosive gas, and therefore, safety problem has been carried out special consideration in the method.For avoiding the system decompression failure, a large amount of concentrate tail gas enters degassing vessel, cause security incident, the present invention also is provided with a quick-closing valve by the pressure interlocked control and comes cut off high concentrate tail gas to enter degassing vessel, separately establish a safety valve simultaneously, by the emptying of part concentrate tail gas, to torch burning, this safe, stable, long-term operation to present method plays vital effect.
(3) can obviously improve the degasifying effect of degassing vessel, reduce inflammable gas in downstream unit and, to the quantity discharged of environment, alleviate environmental pollution; The minimizing of inflammable gas in environment simultaneously, also lay a good foundation for safe, stable, the long-time running of whole device.Apply the present invention to practice, the auxiliary unit of improving partial oxidation acetylene technology is further optimized and played active effect; By reclaiming acetylene, also can increase certain economic benefit.
The accompanying drawing explanation
Fig. 1 is existing process flow diagram.
Fig. 2 is process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
A kind of method that removes dissolved gases from carbon black water of the present invention, referring to Fig. 2, concrete steps are as follows:
The first step, closing the concentrate tail gas that is positioned at concentration unit is the battery limit (BL) valve 1 on the stripping gas pipeline; Close the concentrate tail gas inlet valve 8 of degassing vessel; Utilize the nitrogen purging that pressure is 0.5MPa to collect house steward and degassing vessel 10;
Second step, open concentrate tail gas path before 10 concentrate tail gas inlet valve 8 from the concentration unit to the degassing vessel, and open the empty valve 7 of the first couple before concentrate tail gas inlet valve, to empty emission gases;
The 3rd step, open with leather hose and be connected to the empty valve 3 of the second couple after battery limit (BL) valve 1, the nitrogen that to introduce pressure be 0.5MPa;
The 4th step, open nitrogen, carry out inerting work by second pair of empty valve 3, and sampling analysis is qualified, and the analysis criterion of acceptability is O
2≤ 0.5%;
The 5th step, inerting is closed second pair of empty valve 3 after finishing, and stops filling nitrogen;
The 6th step, open battery limit (BL) valve 1, and open the reducing valve 5 on the concentrate exhaust pipe, by pressure-controlling below 13.5KPa;
The 7th step, the flow control valve 11 before adjust flux meter 9, be adjusted to 150～300m by the flow of concentrate tail gas
3/ h;
The 8th step, after the flow adjustment of concentrate tail gas is stable, opens concentrate tail gas inlet valve 8 qualified concentrate tail gas sent in degassing vessel 10, and open the safety-valve 4, by the emptying of part concentrate tail gas to torch burning.
Fig. 1 is existing process flow diagram, and in gas by partial oxidation of natural acetylene technique processed, the solution gas in carbon black water carries out the nature desorb in degassing vessel, so, desorption effect is poor, is partly dissolved gas and is brought to downstream unit and causes environmental pollution, brings potential safety hazard.
Claims (2)
1. a method that removes dissolved gases from carbon black water, is characterized in that the stripping gas that the concentrate tail gas of concentration unit generation in gas by partial oxidation of natural acetylene technique processed is removed as dissolved gases from carbon black water; Concrete steps are as follows:
The first step, closing the concentrate tail gas that is positioned at concentration unit is the battery limit (BL) valve (1) on the stripping gas pipeline; Close the concentrate tail gas inlet valve (8) of degassing vessel; Utilize the nitrogen purging that pressure is 0.5MPa to collect house steward and degassing vessel (10);
Second step, open concentrate tail gas front path of concentrate tail gas inlet valve (8) of (10) from the concentration unit to the degassing vessel, and open the empty valve of the first couple (7) before concentrate tail gas inlet valve, to empty emission gases;
The 3rd step, open with leather hose and be connected to the empty valve of the second couple (3) after battery limit (BL) valve (1), the nitrogen that to introduce pressure be 0.5MPa;
The 4th step, open nitrogen, carry out inerting work by second pair of empty valve (3), and sampling analysis is qualified, and the analysis criterion of acceptability is O
2≤ 0.5%;
The 5th step, inerting is closed second pair of empty valve (3) after finishing, and stops filling nitrogen;
The 6th step, open battery limit (BL) valve (1), and open the reducing valve (5) on the concentrate exhaust pipe, by pressure-controlling below 13.5KPa;
The 7th step, the flow control valve (11) that adjust flux meter (9) is front, be adjusted to 150～300m3/h by the flow of concentrate tail gas;
The 8th step, after the flow adjustment of concentrate tail gas is stable, opens concentrate tail gas inlet valve (8) qualified concentrate tail gas sent in degassing vessel (10), and open the safety-valve (4), by the emptying of part concentrate tail gas to torch burning.
2. a kind of method that removes dissolved gases from carbon black water as claimed in claim 1, it is characterized in that also being provided with a quick-closing valve by the pressure interlocked control (2) comes cut off high concentrate tail gas to enter degassing vessel, simultaneously separately establish a safety valve (4), by tail gas emptying to torch burning.
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| CN201010173185.8A CN102241421B (en) | 2010-05-14 | 2010-05-14 | Method for removing dissolved gases from carbon black water |
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| CN201010173185.8A CN102241421B (en) | 2010-05-14 | 2010-05-14 | Method for removing dissolved gases from carbon black water |
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| CN102241421B true CN102241421B (en) | 2014-01-01 |
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| CN109663387B (en) * | 2017-10-16 | 2021-08-03 | 中国石油化工股份有限公司 | Degassing and deodorizing method for carbon black water of acetylene device |
| CN110963540A (en) * | 2018-09-30 | 2020-04-07 | 中国石油化工股份有限公司 | Carbon black water degassing and deodorizing method |
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| DE10007039A1 (en) * | 2000-02-16 | 2001-08-23 | Franz Dietrich Oeste | Wool-like product from plant, lichen and/or animal tissue is useful e.g. as filter, sorbent, chemical reagent or substrate, e.g. for flavoring, flavor enhancer or aroma in food or animal feed |
| CN1275880C (en) * | 2004-01-16 | 2006-09-20 | 中国石化镇海炼油化工股份有限公司 | Carbno black water treating method |
| US7485603B2 (en) * | 2005-02-18 | 2009-02-03 | Infineum International Limited | Soot dispersants and lubricating oil compositions containing same |
| CN101530711B (en) * | 2009-04-14 | 2011-12-21 | 中国石油化工股份有限公司 | Method for completely reclaiming tail gas of polyethylene device |
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