CN104826565A - Hydrogenation reaction ammonium salt crystallization prevention device - Google Patents
Hydrogenation reaction ammonium salt crystallization prevention device Download PDFInfo
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- CN104826565A CN104826565A CN201510144678.1A CN201510144678A CN104826565A CN 104826565 A CN104826565 A CN 104826565A CN 201510144678 A CN201510144678 A CN 201510144678A CN 104826565 A CN104826565 A CN 104826565A
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- ammonium salt
- water injection
- injection point
- salt crystallization
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Abstract
A hydrogenation reaction ammonium salt crystallization prevention device specifically includes a reaction furnace, a refining reactor, heat exchangers, a new hydrogen inlet, a raw oil inlet, water injection points and a water injection line, and is characterized in that: the four heat exchangers are in series connection, the reaction furnace and the refining reactor are in series connection, three stages of water injection points are arranged in front of the heat exchangers, and are in series connection, and according to the demand, the water injection points are intermittently used, the water injection points are replaced by E-2101A /B outlet for water injection, device circulating volume can be restored to normal, and the system pressure drop is decreased significantly. By adjusting of the water injection point temperature between ammonium salt crystallization point and water dew point temperature adjusting of the water injection flow of water injection points 1 and 2 according to the flow, the heat exchange effect can achieve the best state, and solid ammonium salt crystallization can be eliminated. The hydrogenation reaction ammonium salt crystallization prevention device solves the problem of low temperature part ammonium salt crystallization in the reaction system, improves the heat exchange efficiency, reduces the load of a heating furnace, and increases the output of the product.
Description
One, technical field
The present invention relates to petrochemical industry, the anti-ammonium salt crystallization device specifically in a kind of hydrogenation reaction.
Two, background technology
In diesel oil hydrogenation process, reaction system can separate out ammonium salt, and these ammonium salts both have impact on heat transfer effect, blocked pipeline again, causes system pressure drop to rise, and is unfavorable for the safe operation of device.The ammonium salt that product is separated out comprises two types, and one is NH
4cl crystallization temperature is 180 ~ 200 DEG C, and another is NH
4hS crystallization temperature 150 DEG C.Because crystallization temperature is different, make the position difference separated out in systems in which.NH
4cl is general, and an in the end heat exchanger place separates out, and NH
4hS generally separates out at high pressure air cooling place.Along with the change raw material in market changes day by day, reaction system low temperature position ammonium salt crystallization outstanding problem, not only result in the rising of system pressure drop, and reduces heat exchange efficiency.
Three, summary of the invention
The present invention is directed to above technical problem, provide a kind of easy to operate, the anti-ammonium salt crystallization device in the hydrogenation reaction of Be very effective.
For this reason, the present invention adopts following technical scheme:
An anti-ammonium salt crystallization device in hydrogenation reaction, comprises reacting furnace, refining reaction device, heat exchanger, new hydrogen entrance, feedstock oil entrance, injection point and water line, it is characterized in that 4 heat exchangers are connected.Reacting furnace is connected with refining reaction device, is provided with injection point 6 between heat exchanger A and B, is provided with injection point 5 between heat exchanger B and C, and the tube side line place after heat exchanger D is provided with injection point 4.Crude oil feeding mouth and new hydrogen entrance are set in bottom, and two pipelines carry out parallel connection.
Three grades of injection points are set before heat exchanger, make it connect, and according to demand, interval uses.
By reaction system injection point move forward, injection point be changed to E-2101A B export water filling, device internal circulating load can recover normal, and system pressure drop obviously declines.
Regulate injection point temperature between ammonium salt crystallization point and aqueous dew point temperature, and according to Flow-rate adjustment injection point 1,2 injection flow, to make heat transfer effect reach optimum state, eliminate the crystallization of solid ammonium salt.
Anti-ammonium salt crystallization device in hydrogenation reaction of the present invention compared with prior art, has following remarkable advantage.
1. adopt the method for three grades of injection point series connection, method is simple to operation, and alleviate ammonium salt crystallization in cyclic process simultaneously and occur, holdout device short-term low load operation, reduces the load of heating furnace.
2., as ammonium salt blockage is serious, blocking eliminated by washing ammonium salt of need stopping work, and not only reduces production efficiency, and as do not cleaned thoroughly, can affect lower period run.Present invention reduces the replacement cycle of new hydrogen antichlor, without the need to washing ammonium salt of stopping work, fundamentally solve the blockage problem of ammonium salt crystallization, and improve product yield, further increase the production efficiency of enterprise.
3. take to solve ammonium chloride in the problem of these position crystallizations in the method for high pressure heat exchanger position intermittent water flooding, not only solve reaction system low temperature position ammonium salt crystallization problem, improve heat exchange efficiency, reach energy-conservation object.
In sum, the present invention not only solves reaction system low temperature position ammonium salt crystallization problem, improves heat exchange efficiency, reduce the load of heating furnace, and improve product yield, expand the vend space of product, obtain good economic benefit, there is good application and popularization value.
Four, accompanying drawing explanation
Fig. 1 is the flow process floor map of the anti-ammonium salt crystallization device in hydrogenation reaction.
In figure: 1 injection point, 2 injection points, 3 injection points, 4 water lines, 5 new hydrogen entrances, 6 feedstock oil entrances, 7 refining reaction devices, 8 reacting furnaces, 9 heat exchanger A/B/C/D.
Five, detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail:
As shown in Figure 1, in the bottom of this device, the feedstock oil entrance 6 of pipeline parallel connection and new hydrogen entrance 5 are set, the injection point 1, injection point 2 and the injection point 3 that are supplied water by water line 4 is got involved respectively between heat exchanger A/B/C/D9, water filling temperature controls between ammonium salt crystallization point and water dew point, and water injection rate controls be greater than 5.2% with feedstock oil ratio.Along with the carrying out of reaction in traditional handicraft, ammonium salt crystallization separates out accumulation in heat exchanger A/B/C/D9, blocks, and reduces temperature rise to recycle hydrogen flow, and its consequence increases the weight of again crystallization and constantly reach forms vicious circle.The present invention is while strict control feedstock oil flow, interval alternately closes injection point 1, injection point 2 and injection point 3, regulable control injection flow and temperature, stop ammonium salt crystallization to be separated out and pile up, ensure that feedstock oil and new hydrogen complete reflection by reacting furnace 8 and refining reaction device 7 under even, the stable state, reach improve production efficiency and product quality, extension device time between overhauls(TBO) and service life, the object of energy-conserving and environment-protective.
This reaction unit, crude oil feeding mouth 6 is set in bottom, new hydrogen entrance 5, two pipelines are in parallel, new hydrogen and feedstock oil are respectively by new hydrogen entrance 5 and feedstock oil entrance 6, enter refining reaction device 7 by heat exchanger 8, heating furnace 6 to react, the ammonium salt that reaction is separated out, at heat exchanger 8 place Crystallization Plugging, now starts in injection point 1,2 and 3 water filling.Injection point 1,2 and 3 operating temperature between ammonium salt crystallization point and aqueous dew point temperature, than being greater than 5.2% between water injection rate and raw material oil mass.Along with the carrying out of reflection, the formation of crystal, recycle hydrogen flow reduces further, crystallization temperature constantly raises, and crystalline temperature constantly moves forward, and now notes, seriously control raw material well, according to Flow-rate adjustment injection point 1,2 injection flow, interval uses three injection points as required, reaches energy-conservation object simultaneously.Significantly risen by this technique device recycle hydrogen, solve the crystallisation problems of ammonium salt in time, successful simultaneously.
Anti-ammonium salt crystallization device in hydrogenation reaction of the present invention, structure is simple, easy to make, can process realization, have good value for applications shown in by specification, accompanying drawing.
Except the technical characteristic described in description, be the known technology of those skilled in the art.
Claims (4)
1. the anti-ammonium salt crystallization device in hydrogenation reaction, comprise reacting furnace, refining reaction device, heat exchanger, new hydrogen entrance, feedstock oil entrance, injection point, water line, is characterized in that 4 heat exchangers are connected.Reacting furnace is connected with refining reaction device, is provided with injection point 6 between heat exchanger A and B, is provided with injection point 5 between heat exchanger B and C, and the tube side line place after heat exchanger D is provided with injection point 4.
2. by arranging three grades of injection points described in claim 1 before heat exchanger, make it connect, and according to demand, interval use.
3. by reaction system injection point being moved forward described in claim 1, injection point injection point be changed to E-2101A B export water filling, device internal circulating load can recover normal, and system pressure drop obviously declines.
4. by regulating injection point temperature between ammonium salt crystallization point and aqueous dew point temperature, and according to Flow-rate adjustment injection point 1,2 injection flow, to make heat transfer effect reach optimum state described in claim 1, the crystallization of defect elimination solid ammonium salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510144678.1A CN104826565A (en) | 2015-03-31 | 2015-03-31 | Hydrogenation reaction ammonium salt crystallization prevention device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510144678.1A CN104826565A (en) | 2015-03-31 | 2015-03-31 | Hydrogenation reaction ammonium salt crystallization prevention device |
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| CN201510144678.1A Pending CN104826565A (en) | 2015-03-31 | 2015-03-31 | Hydrogenation reaction ammonium salt crystallization prevention device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218580A (en) * | 2018-03-01 | 2019-09-10 | 中石化广州工程有限公司 | A kind of method of hydrogenation reaction effluent dechlorination |
| CN110218579A (en) * | 2018-03-01 | 2019-09-10 | 中石化广州工程有限公司 | A kind of method of hydrogenation reaction system dechlorination |
| CN113966381A (en) * | 2019-06-20 | 2022-01-21 | 托普索公司 | Method for preheating a hydroprocessing reactor feed stream |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218580A (en) * | 2018-03-01 | 2019-09-10 | 中石化广州工程有限公司 | A kind of method of hydrogenation reaction effluent dechlorination |
| CN110218579A (en) * | 2018-03-01 | 2019-09-10 | 中石化广州工程有限公司 | A kind of method of hydrogenation reaction system dechlorination |
| CN113966381A (en) * | 2019-06-20 | 2022-01-21 | 托普索公司 | Method for preheating a hydroprocessing reactor feed stream |
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Application publication date: 20150812 |
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