CN105214329A - Distillation system and rectification process - Google Patents
Distillation system and rectification process Download PDFInfo
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- CN105214329A CN105214329A CN201510560962.7A CN201510560962A CN105214329A CN 105214329 A CN105214329 A CN 105214329A CN 201510560962 A CN201510560962 A CN 201510560962A CN 105214329 A CN105214329 A CN 105214329A
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- logistics
- reboiler
- heat
- rectifier unit
- pump housing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of distillation system and rectification process, belong to chemical industry equipment and technology field, designing for solving the problems such as existing rectification process heat can not make full use of.Distillation system provided by the invention comprises waste-heat recovery device and at least two rectifier units, waste-heat recovery device is used for providing high temperature heat source for rectifier unit, wherein, rectifier unit comprises rectifying column, is located at the pump housing of rectifier bottoms, the heat exchanger be connected with the pump housing and reboiler furnace, all can be communicated with the reboiler of all the other rectifier units between the heat exchanger of any one rectifier unit and reboiler furnace, until rectifying logistics by with the high temperature heat source heat exchange in waste-heat recovery device after flow through each reboiler again and realize heat exchange and be finally back to reboiler furnace.The invention provides and additionally provide a kind of rectification process.Distillation system of the present invention can reduce costs, save fuel.Heat can make full use of by rectification process of the present invention.
Description
Technical field
The present invention relates to a kind of distillation system and the rectification process based on this distillation system.
Background technology
Fuel gas and fuel oil are that people live a kind of resource indispensable with development of modern industry, along with the development of modern industry, natural gas and fuel oil also more and more in short supply as valuable source a kind of in chemical enterprise.At present, in chemical enterprise, also have a lot of high-temperature position thermal source to fail to be fully used, and have at the bottom of a lot of rectifying column equipment tower that thermal source reboiler furnace is also at a large amount of gas-firing or fuel oil, so not only heat is failed to be fully used and is caused waste, and enterprise's processing cost is high, benefit is low.
Circulating pump, the reboiler furnace be communicated with circulating pump and the cooler etc. for heat exchange that existing rectifier unit comprises rectifying column, arranges in rectifier bottoms, these devices multiple in chemical enterprise are all used alone, heat can not realize recycling in multiple device, the problems such as energy waste is serious, processing cost increase that this just causes.
Summary of the invention
An object of the present invention is propose one can reduce costs, fuel-saving distillation system.
Another object of the present invention proposes a kind of rectification process that heat can be made full use of.
For reaching this object, on the one hand, the present invention is by the following technical solutions:
A kind of distillation system, comprise waste-heat recovery device and at least two rectifier units, described waste-heat recovery device is used for providing high temperature heat source for described rectifier unit, wherein, described rectifier unit comprises rectifying column, be located at the pump housing of described rectifier bottoms, the heat exchanger that is connected with the described pump housing and reboiler furnace, all can be communicated with the reboiler of all the other rectifier units between the heat exchanger of rectifier unit described in any one and reboiler furnace, until rectifying logistics by with the high temperature heat source heat exchange in waste-heat recovery device after flow through each reboiler again and realize heat exchange and be finally back to reboiler furnace.
Further, described waste-heat recovery device is the logistics corridor of multiple serial or parallel connection, and for depositing high temperature logistics in described logistics corridor, the heat of described high temperature logistics is that technique is had more than needed heat.
Further, described distillation system comprises the first rectifier unit and at least one second rectifier unit; First pump housing, the heat exchanger be connected with described first pump housing and the first reboiler furnace that described first rectifier unit comprises the first rectifying column, arranges in described first rectifier bottoms; The reboiler that described second rectifier unit at least comprises Second distillation column, second pump housing arranged bottom described Second distillation column and is connected with described second pump housing; Described heat exchanger, reboiler, described first reboiler furnace described at least one are communicated with successively, from first rectifying column extract out the first logistics after described heat exchanger and described high temperature logistics heat exchange, flow through reboiler described at least one again, for other logistics heat exchange.
Further, described heat exchanger connects described logistics corridor, and the high temperature logistics in described logistics corridor is used for and described first logistics heat exchange.
Further, described second rectifier unit also comprises the second reboiler furnace be connected with described reboiler.
Further, described high temperature substrate flow to few higher than described first logistics 20 DEG C.
Further, pressure-reducing valve is provided with between described first rectifying column and described first reboiler furnace.
Further, the boiling point of described first logistics is higher than the boiling point of arbitrary logistics extracted out from described second rectifier unit.
On the other hand, the present invention is by the following technical solutions:
A kind of rectification process based on above-mentioned distillation system, first logistics of extracting out from the first rectifying column flows through at least one reboiler and other logistics heat exchange again after described heat exchanger and described high temperature logistics heat exchange, and described first logistics after heat exchange is back in the first reboiler furnace of the first rectifier unit.
Concrete, described rectification process is specially:
Step 1, from first logistics of extracting out in described first rectifying column through described first the pump housing pressurization after flow through the high temperature logistics heat exchange flowing through described heat exchanger described heat exchanger and described waste-heat recovery device;
Step 2, the logistics of extracting out in each described Second distillation column flow through the described reboiler of its correspondence after described second pump housing pressurization, and the first logistics after step 1 heat exchange flows through multiple described reboiler successively and carries out heat exchange from different logistics;
Step 3, the first logistics after step 2 heat exchange are back to described first reboiler furnace, enter described first rectifying column after heating again.
Beneficial effect of the present invention is:
(1), waste-heat recovery device in the present invention can provide high temperature heat source, this high temperature heat source is not directly or indirectly provide the heat but technique is had more than needed by heating furnace, and the reboiler by all the other rectifier units will be communicated between the reboiler of any one rectifier unit and reboiler furnace, until rectifying thing by with the high temperature heat source heat exchange in waste-heat recovery device after flow through again after each reboiler realizes heat exchange and be back to reboiler furnace, adjust by thermal process by technique heat of having more than needed, fully excavate heat of high temperature in chemical enterprise, it is made to be utilized more fully, enterprise's firing rate is significantly reduced.
(2), the present invention is no longer confined to the use of single rectifier unit, but multiple rectifier unit formed a system, and heat can transmit according to demand, achieves the cascade utilization of energy, decreases the high-quality low phenomenon of energy in chemical enterprise.
(3), the present invention using the logistics of extracting out from rectifying column as circulatory mediator, a kind of from component circulation logistics, the third logistics is not needed to participate in heat exchange, and system is open cycle system, rectifying tower bottoms stream product quality can be ensured, the cost increase that circulatory mediator causes can be reduced again.
Accompanying drawing explanation
Fig. 1 is the structural representation of the distillation system that the preferred embodiment of the present invention provides.
Be labeled as in figure:
11, the first rectifying column; 12, first pump housing; 13, heat exchanger; 14, the first reboiler furnace; 21, Second distillation column; 22, second pump housing; 23, reboiler; 24, the second reboiler furnace.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
Preferred embodiment:
This preferred embodiment provides a kind of distillation system.This distillation system comprises waste-heat recovery device and at least two rectifier units, waste-heat recovery device is used for providing high temperature heat source for rectifier unit, wherein, rectifier unit comprises rectifying column, is located at the pump housing of rectifier bottoms, the heat exchanger be connected with the pump housing and reboiler furnace, all can be communicated with the reboiler of all the other rectifier units between the heat exchanger of any one rectifier unit and reboiler furnace, until rectifying logistics by with the high temperature heat source heat exchange in waste-heat recovery device after flow through each reboiler again and realize heat exchange and be finally back to reboiler furnace.
In the present embodiment, distillation system comprises waste-heat recovery device, the first rectifier unit and at least one the second rectifier unit; First rectifier unit comprises the first rectifying column 11, first pump housing 12 arranged bottom the first rectifying column 11, the heat exchanger 13 be connected with first pump housing 12 and the first reboiler furnace 14, pressure-reducing valve is provided with between first rectifying column 11 and the first reboiler furnace 14, to ensure vaporization ratio when the first logistics enters the first rectifying column 11, the outlet pressure of first pump housing 12 needs according to the maximum temperature of the first logistics after high temperature logistics heat exchange and determines, and needs to make the first logistics not vaporize in course of conveying again; Second rectifier unit comprises Second distillation column 21, second pump housing 22 arranged bottom Second distillation column 21, the reboiler 23 be connected with second pump housing 22 and the second reboiler furnace 24 be connected with reboiler 23; Heat exchanger 13, at least one reboiler 23, first reboiler furnace 14 are communicated with successively, and first logistics of extracting out from the first rectifying column 11 flows through at least one reboiler 23 again after heat exchanger 13 with high temperature logistics heat exchange, for other logistics heat exchange.
Waste-heat recovery device is the logistics corridor of multiple serial or parallel connection, and for depositing high temperature logistics in logistics corridor, the heat of high temperature logistics is that technique is had more than needed heat.Heat exchanger 13 attachment circulation road, the high temperature logistics in logistics corridor is used for and the first logistics heat exchange.The boiling point of the first logistics is higher than the boiling point of arbitrary logistics of extracting out from the second rectifier unit, and this first logistics is the logistics that in whole system, heat endurance is best, and high temperature substrate flow to few higher than the first logistics 20 DEG C.
In the present embodiment, the number of heat exchanger is not limit, and is at least one, also can be multiple, can realize the function of heat exchange.
Rectification process is specially:
Step 1, first logistics of extracting out in the first rectifying column 11 flow through the high temperature logistics heat exchange flowing through heat exchanger 13 heat exchanger 13 and waste-heat recovery device after first pump housing 12 pressurizes;
Step 2, the logistics of extracting out in each Second distillation column 21 flow through the reboiler 23 corresponding with it after second pump housing 22 pressurizes, and the first logistics after step 1 heat exchange flows through multiple reboiler 23 successively and carries out heat exchange from different logistics;
Step 3, the first logistics after step 2 heat exchange are back to the first reboiler furnace 14, enter the first rectifying column 11 after heating again.
The above-mentioned high temperature logistics mentioned is the logistics of more than 340 DEG C.
Above-mentioned technique can save the Fuel Consumption of multiple second reboiler furnaces 24 in many groups the second rectifier unit, when complete alternative fuel, the temperature of the rectifying column of its correspondence need be returned by other logistics of flow-control that the first logistics enters the reboiler 23 of each second rectifier unit, when Some substitute fuel, the temperature of the rectifying column of its correspondence need be returned by other logistics of reboiler furnace 14 fuel regulation of the first rectifier unit.
Above-mentioned technique can also save the Fuel Consumption of the reboiler furnace 14 of the first rectifier unit, when complete alternative fuel, high temperature logistics and the first logistics heat exchange is needed to meet the temperature that control first logistics goes out Korea Spro's hot gas 13, when Some substitute fuel, the temperature of the one the first rectifying columns 11 need be returned by reboiler furnace 14 fuel regulation first logistics of the first rectifier unit.
Technical scheme for a better understanding of the present invention, now illustrates as follows:
Logistics S
1(274 DEG C) are from T
1after rectifying column 11 is extracted out, through P
1high temperature logistics S is delivered to after (first pump housing 12) is forced into 1.1MPa
h(340 DEG C) place is through E
h(heat exchanger 13) and high temperature logistics S
hheat exchange, the logistics S after heat exchange
1temperature is (294.6 DEG C), is first delivered to T
2(Second distillation column 21) and F
2(the second reboiler furnace) 24 places, through E
2(reboiler 23) and logistics S
2(263 DEG C) heat exchange, then logistics S
1(282 DEG C) flow to F
1(the first reboiler furnace 14) place, through F
1t is returned after being heated to (285 DEG C)
1, form circulation.Such as, as shown in Figure 1, the second rectifier unit has N number of, then the logistics S after heat exchange
1through E
2with logistics S
2heat exchange, through E
3with logistics S
3heat exchange, until through E
nwith logistics S
nheat exchange, then logistics S
1flow to F
1place, through F
1t is returned after heating
1, wherein, E
2, E
3... E
nbe the reboiler 23 of the second rectifier unit in the present embodiment, only rectifying logistics is different.
Rectification process in the present embodiment is the use thermal process by adjusting distillation system, has fully excavated heat of high temperature in chemical enterprise, has made it be utilized more fully, enterprise's firing rate is significantly reduced.
It is more than the embodiment provided by reference to the accompanying drawings; only realize preferred version of the present invention to be not intended to limit; anyly the specific embodiment of the present invention is modified or equivalent replacement is carried out to portion of techniques feature; and do not depart from the spirit of technical solution of the present invention, all should be encompassed in request of the present invention protection technical scheme scope in the middle of.Protection scope of the present invention also comprises those skilled in the art and does not pay the thinkable any alternate embodiments of creative work.
Claims (10)
1. a distillation system, is characterized in that, comprises waste-heat recovery device and at least two rectifier units, and described waste-heat recovery device is used for providing high temperature heat source for described rectifier unit, wherein,
Described rectifier unit comprises rectifying column, be located at the pump housing of described rectifier bottoms, the heat exchanger that is connected with the described pump housing and reboiler furnace, all can be communicated with the reboiler of all the other rectifier units between the heat exchanger of rectifier unit described in any one and reboiler furnace, until rectifying logistics by with the high temperature heat source heat exchange in waste-heat recovery device after flow through each reboiler again and realize heat exchange and be finally back to reboiler furnace.
2. a kind of distillation system according to claim 1, is characterized in that, described waste-heat recovery device is the logistics corridor of multiple serial or parallel connection, and for depositing high temperature logistics in described logistics corridor, the heat of described high temperature logistics is that technique is had more than needed heat.
3. a kind of distillation system according to claim 2, is characterized in that, described distillation system comprises the first rectifier unit and at least one second rectifier unit; First pump housing (12), the heat exchanger (13) be connected with described first pump housing (12) and the first reboiler furnace (14) that described first rectifier unit comprises the first rectifying column (11), arranges in described first rectifying column (11) bottom;
Described second rectifier unit at least comprises Second distillation column (21), second pump housing (22) arranged in described Second distillation column (21) bottom and the reboiler (23) be connected with described second pump housing (22);
Described heat exchanger (13), reboiler (23), described first reboiler furnace (14) described at least one are communicated with successively, first logistics of extracting out from the first rectifying column (11) flows through reboiler described at least one (23) again after described heat exchanger (13) with described high temperature logistics heat exchange, for other logistics heat exchange.
4. a kind of distillation system according to claim 3, is characterized in that, described heat exchanger (13) connects described logistics corridor, and the high temperature logistics in described logistics corridor is used for and described first logistics heat exchange.
5. a kind of distillation system according to claim 3, is characterized in that, described second rectifier unit also comprises the second reboiler furnace (24) be connected with described reboiler (23).
6. a kind of distillation system according to claim 4, is characterized in that, described high temperature substrate flow to few higher than described first logistics 20 DEG C.
7. a kind of distillation system according to claim 6, is characterized in that, is provided with pressure-reducing valve between described first rectifying column (11) and described first reboiler furnace (14).
8. a kind of distillation system according to claim 6, is characterized in that, the boiling point of described first logistics is higher than the boiling point of arbitrary logistics of extracting out from described second rectifier unit.
9. the rectification process based on the arbitrary distillation system of claim 1-8, it is characterized in that, first logistics of extracting out from the first rectifying column (11) flows through at least one reboiler (23) and other logistics heat exchange again after described heat exchanger (13) with described high temperature logistics heat exchange, and described first logistics after heat exchange is back in first reboiler furnace (14) of the first rectifier unit.
10. a kind of rectification process based on distillation system according to claim 9, this distillation system comprises waste-heat recovery device, the first rectifier unit and multiple second rectifier unit, first pump housing (12), the heat exchanger (13) be connected with described first pump housing (12) and the first reboiler furnace (14) that described first rectifier unit comprises the first rectifying column (11), arranges in described first rectifying column (11) bottom; Described second rectifier unit comprises Second distillation column (21), second pump housing (22) arranged in described Second distillation column (21) bottom and the reboiler (23) be connected with described second pump housing (22); Described heat exchanger (13), multiple described reboiler (23), described first reboiler furnace (14) are communicated with successively; Multiple described second rectifier unit is used for the different logistics of rectifying; It is characterized in that, described rectification process is specially:
Step 1, first logistics of extracting out in described first rectifying column (11) flow through the high temperature logistics heat exchange flowing through described heat exchanger (13) described heat exchanger (13) and described waste-heat recovery device after described first pump housing (12) pressurization;
Step 2, the logistics of extracting out in each described Second distillation column (21) flow through the described reboiler (23) of its correspondence after described second pump housing (22) pressurization, and the first logistics after step 1 heat exchange flows through multiple described reboiler (23) successively and carries out heat exchange from different logistics;
Step 3, the first logistics after step 2 heat exchange are back to described first reboiler furnace (14), enter described first rectifying column (11) after heating again.
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| CN201510560962.7A CN105214329A (en) | 2015-09-06 | 2015-09-06 | Distillation system and rectification process |
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| CN201510560962.7A CN105214329A (en) | 2015-09-06 | 2015-09-06 | Distillation system and rectification process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110511784A (en) * | 2019-09-02 | 2019-11-29 | 上海优华系统集成技术股份有限公司 | It is hydrocracked fractionating column tail oil heat utilization system and method |
| CN111484870A (en) * | 2019-01-29 | 2020-08-04 | 中石化广州工程有限公司 | Heat exchange method for fractionating tower |
| CN115487522A (en) * | 2022-09-06 | 2022-12-20 | 内蒙古东岳金峰氟化工有限公司 | Hydrogen fluoride purification system and process |
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| CN102977910A (en) * | 2011-09-02 | 2013-03-20 | 中国石油化工集团公司 | System and method for light hydrocarbon recovery |
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2015
- 2015-09-06 CN CN201510560962.7A patent/CN105214329A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201309912Y (en) * | 2008-12-05 | 2009-09-16 | 上海九元石油化工有限公司 | Heat integration system of catalytic cracking, kerosene hydrogenation and aromatics extraction device in oil refinery |
| CN102977910A (en) * | 2011-09-02 | 2013-03-20 | 中国石油化工集团公司 | System and method for light hydrocarbon recovery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111484870A (en) * | 2019-01-29 | 2020-08-04 | 中石化广州工程有限公司 | Heat exchange method for fractionating tower |
| CN110511784A (en) * | 2019-09-02 | 2019-11-29 | 上海优华系统集成技术股份有限公司 | It is hydrocracked fractionating column tail oil heat utilization system and method |
| CN115487522A (en) * | 2022-09-06 | 2022-12-20 | 内蒙古东岳金峰氟化工有限公司 | Hydrogen fluoride purification system and process |
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Application publication date: 20160106 |