CN110449096A - A kind of process and aromatic device low-grade utility system improving aromatic device low-grade utility efficiency - Google Patents
A kind of process and aromatic device low-grade utility system improving aromatic device low-grade utility efficiency Download PDFInfo
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- CN110449096A CN110449096A CN201810434045.8A CN201810434045A CN110449096A CN 110449096 A CN110449096 A CN 110449096A CN 201810434045 A CN201810434045 A CN 201810434045A CN 110449096 A CN110449096 A CN 110449096A
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- Prior art keywords
- steam
- aromatic device
- aromatic
- low
- grade utility
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to arene industrial technical fields, provide a kind of process and aromatic device low-grade utility system for improving aromatic device low-grade utility efficiency.The process includes: the raise steam for being generated aromatic device using screw compressor, and boosting steam is made, the boosting steam is used for steam-heating apparatus and/or is incorporated to factory steam pipe network.Present invention process method can effectively improve aromatic device low-grade utility efficiency, reduce aromatic device energy consumption, reduce enterprise operation cost.
Description
Technical field
The invention belongs to arene industrial technical fields, and in particular to a kind of work for improving aromatic device low-grade utility efficiency
Process and aromatic device low-grade utility system.
Background technique
Aromatic device is one of core material device of chemical fibre industry, it is split with straight run, hydrocracked naphtha or ethylene
Solution gasoline is raw material, at least one of production benzene, paraxylene, meta-xylene and ortho-xylene aromatic hydrocarbon product.
Many low grade heat energies can not be utilized in aromatic device, and therefore, aromatic device low-grade utility becomes aromatic hydrocarbons
The energy-saving important means of device.Currently, the Low Temperature Thermal that aromatic device generates is mostly used to generate hot water or low-pressure steam occurs
Hot water or low-pressure steam be mainly used for inside and outside pipeline and equipment heat tracing, factory life and heating heat etc.；If still having a surplus, usually
Consider low temperature heat cooling and low-temperature heat power generation.
Since low-temperature heat power generation efficiency is lower, typically less than 20%, therefore, how to improve aromatic device low-grade utility effect
Rate becomes the energy-efficient key issues of aromatic device.For low temperature heat energy, generally use at present ORC (Organic Rankine Cycle) or
Kalina circulation carries out gas-to electricity, but this method heat indirect utilization, efficiency are relatively low.It was found by the inventors of the present invention that low
The thermogenetic low-pressure steam of temperature, the equipment by being directly used in device or needing in factory heat supply after boosting, it is possible to reduce heat
Energy loss when electrotransformation improves aromatic device low-grade utility efficiency.And use which kind of means boosting low temperature thermogenetic
Steam becomes the key for improving aromatic device low-grade utility efficiency.
Summary of the invention
The object of the present invention is to provide a kind of processes and aromatic device for improving aromatic device low-grade utility efficiency
Low-grade utility system, this method can efficiently utilize the Low Temperature Thermal of aromatic device.
The present inventor compares through multi-party research, and discovery screw compressor can preferably utilize aromatic device low temperature
Heat, and the present invention is completed based on this.
The first aspect of the present invention provides a kind of process for improving aromatic device low-grade utility efficiency, utilizes screw rod
The raise steam that formula compressor generates aromatic device is made boosting steam, the boosting steam is used for steam-heating apparatus
And/or it is incorporated to factory steam pipe network.
Preferably, the process of the invention carries out in a kind of aromatic device low-grade utility system, the system
System includes that aromatic device produces Low Temperature Thermal facility, screw compressor, steam superheating equipment, factory steam pipe network.
According to the present invention, the steam that the aromatic device generates is to utilize the thermogenetic steam of low temperature in aromatic device.
In general, the temperature of the Low Temperature Thermal in the aromatic device is 100 DEG C -220 DEG C.The mode of aromatic device generation steam
It may include by the condensation of distillation tower top material and/or product condensation or cooling in aromatic device.
According to the present invention, the gauge pressure for the steam that the aromatic device generates is preferably 0.1MPa-1.3MPa；Further preferably
For 0.1MPa-0.6MPa.The gauge pressure of the obtained boosting steam is preferably 0.7MPa-4.0MPa；Further preferably
0.8MPa-1.3MPa。
According to the present invention, screw compressor is boosting steam simultaneously, can spray into condensed water in suction port of compressor, eliminate pressure
The degree of superheat of contracting machine outlet reaches volume increase boosting steaming effect using compression heat.Steam is generated based on aromatic device simultaneously
The gauge of gauge pressure and the steam that boosts can complete one-part form using helical-lobe compressor and boost, economical rationality the most.Cause
This, using screw compressor, the steam boosting that aromatic device is generated, can be more to the gauge of above-mentioned preferred boosting steam
The saving of heat made full use of with equipment energy consumption is realized well.
According to the present invention, the produced steaming of aromatic device Low Temperature Thermal can be used in the screw compressor used in steam that boosts
Vapour drives and/or uses electric drive.
In the present invention, the aromatic device includes para-xylene production unit, meta-xylene process units and ortho-xylene
At least one of process units, for example, combination of two of them process units or the combination of three productions device.
The second aspect of the present invention provides a kind of aromatic device low-grade utility system, as depicted in figs. 1 and 2, the system
Low Temperature Thermal facility, screw compressor, steam superheating equipment, factory steam pipe network are produced including aromatic device.
Wherein, the system may also include the driving motor of steam driven compressor turbine (as shown in Figure 1) or compressor
(as shown in Figure 2), the driving as screw compressor.
The course of work of present invention process method and system is as follows: referring to Figures 1 and 2, utilizing the distillation in aromatic device
Overhead condensation, product condensation etc. produce the steam 1 that gas equipment A is generated and pass through screw compressor B boosting preparation boosting steam 2, spiral shell
Rod-type compressor B carries out steam drive using the produced steam driven compressor turbine T of aromatic device Low Temperature Thermal or uses pressure
Contracting machine driving motor M carries out electric drive；The boosting steam 2 of generation is used for steam-heating apparatus or factory steam pipe network C.
The beneficial effect comprise that
(1) present invention uses one section of screw compressor, it may be difficult to which the steam directly utilized changes the liter utilized for convenience
Steam is pressed, boosting steam is directly used in the steam-heating apparatus in device or in factory, or is directly incorporated into factory steam pipe network, is
A kind of effective means improving energy utilization efficiency, avoids low-quality steam and is converted into the low problem of electric energy efficiency, ensure that
The maximization of low-grade utility efficiency.
(2) boosting technique proposed by the present invention has taken into account booster apparatus energy consumption minimum while reaching boost effect,
Invest low, the optimal feature of benefit has saved investment and production run expense.
(3) present invention is the energy-saving another effective way of aromatic hydrocarbons, and paraxylene, meta-xylene and neighbour two can be improved
The productivity effect of toluene.
Other features and advantages of the present invention will then part of the detailed description can be specified.
Detailed description of the invention
Exemplary embodiment of the invention is described in more detail in conjunction with the accompanying drawings, it is of the invention above-mentioned and its
Its purpose, feature and advantage will be apparent, wherein in exemplary embodiment of the invention, identical reference label
Typically represent same parts.
Fig. 1 is the flow diagram that the present invention is boosted using Low Temperature Thermal producing steam driving method.
Fig. 2 is the flow diagram that the present invention is boosted using electric drive mode.
Description of symbols:
1, steam；2, boost steam；A, the distillation overhead condensation in aromatic device, product condensation etc. produce gas equipment；B, spiral shell
Rod-type compressor；C, steam-heating apparatus or factory steam pipe network；T, steam driven compressor turbine；M, driven compressor electricity
Machine.
Specific embodiment
The preferred embodiment of the present invention is described in more detail below.Although the following describe preferred implementations of the invention
Mode, however, it is to be appreciated that may be realized in various forms the present invention without that should be limited by the embodiments set forth herein.
Embodiment
As Figure 1-Figure 2, the present invention improves aromatic hydrocarbons used by the process of aromatic device low-grade utility efficiency
Device low-grade utility system includes that aromatic device produces Low Temperature Thermal facility, screw compressor, steam-heating apparatus, factory steam
Pipe network.The raise steam that this method utilizes screw compressor to generate aromatic device is made boosting steam, the boosting is steamed
Vapour is for steam-heating apparatus and/or is incorporated to factory steam pipe network.
Below by specific embodiment, the present invention will be described in detail.In following embodiment, with aromatic device tower top
Generate 170-210 DEG C of 200t/h, for the superheated steam of 0.4-0.6MPa gauge pressure, steam pressure is 0.8-1.3MPa after boosting
Gauge pressure for steam-heating apparatus or is incorporated to factory steam pipe network.
Embodiment 1
As shown in Figure 1, the low-pressure steam that aromatic device generates prepares boosting steam by screw compressor boosting,
After boosting uses screw compressor, drive form that the produced steam drive of aromatic device Low Temperature Thermal, boosting is used to overheat, steam
For steam-heating apparatus.This process can produce boosting steam 130t/h.
Embodiment 2
As shown in Fig. 2, the low-pressure steam that aromatic device generates prepares boosting steam by screw rod pressure type contracting machine boosting,
Boosting uses screw compressor, and drive form uses electric drive.Condensed water is sprayed into suction port of compressor, eliminates compressor outlet
The degree of superheat, complete boosting after, steam is incorporated to factory steam pipe network.This process can produce boosting steam 220t/h.
Comparative example
The 200t/h steam-electric power produced using above-mentioned aromatic device.Power generation drives synchronous generator using condensing turbine
Machine.
Embodiment 1, embodiment 2 and comparative example income and Expenditure Levels are shown in Table 1.
Table 1
| Comparative example | Embodiment 1 | Embodiment 2 | |
| Steam total amount, t/h | 200 | 200 | 200 |
| Income: | |||
| Generated energy, kW | 20000 | 0 | 0 |
| Generate 1.0MPaG quantity of steam, t/h | 0 | 130 | 220 |
| Consumption: | |||
| Electricity consumption, kW | 0 | 0 | 13700 |
| Electricity consumption annual cost, Wan Yuan | 0 | 0 | 8220 |
| Recycle water consumption, t/h | 10500 | 4242 | 0 |
| Year is saved, Wan Yuan: | Benchmark | Benchmark+3126 | Benchmark+5180 |
| Electric network reconstruction amount | High pressure grid-connected system | Nothing | 1 set of high-voltage frequency converter |
It can be seen that the low-pressure steam generated in aromatic device by the data of 1 embodiment 2 of table and enter helical-lobe compressor,
And condensed water is sprayed into suction port of compressor, the degree of superheat of compressor outlet is eliminated, the final saturated vapor for generating about 220t/h.Benefit
With itself compression heat, achieve the effect that volume increase boosting steam.
It can be seen that comparative example heating efficiency is low by 1 correlation data of table, only 15% or so converting heat is electricity
It can be used.Embodiment 1,2 heats directly utilize, and reduce energy loss, improve capacity usage ratio.It can be with from benefit
Find out, embodiment 1 is than 31,260,000 yuan of comparative example high efficiency, and embodiment 2 is than 51,800,000 yuan of comparative example high efficiency.Embodiment 1 is not required to
Power grid is transformed, embodiment 2 is smaller to network system retrofit work amount compared with comparative example, invests lower.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.
Claims (10)
1. a kind of process for improving aromatic device low-grade utility efficiency, which is characterized in that will using screw compressor
The raise steam that aromatic device generates is made boosting steam, the boosting steam is used for steam-heating apparatus and/or is incorporated to work
Factory's steam pipe network.
2. the process according to claim 1 for improving aromatic device low-grade utility efficiency, wherein the technique side
Method carries out in a kind of aromatic device low-grade utility system, and the system comprises aromatic devices to produce Low Temperature Thermal facility, screw
Compressor, steam superheating equipment, factory steam pipe network.
3. the process according to claim 2 for improving aromatic device low-grade utility efficiency, wherein the aromatic hydrocarbons dress
Set generation steam be Low Temperature Thermal using the thermogenetic steam of low temperature in aromatic device, in the aromatic device temperature it is excellent
It is selected as 100 DEG C -220 DEG C.
4. the process according to claim 1 for improving aromatic device low-grade utility efficiency, wherein aromatic device produces
The mode of raw steam includes by the condensation of distillation tower top material and/or product condensation or cooling in aromatic device.
5. the process according to claim 1 for improving aromatic device low-grade utility efficiency, wherein the aromatic hydrocarbons dress
The gauge pressure for setting the steam of generation is 0.1MPa-1.3MPa；Preferably 0.1MPa-0.6MPa.
6. the process according to claim 1 for improving aromatic device low-grade utility efficiency, wherein the boosting is steamed
The gauge pressure of vapour is 0.7MPa-4.0MPa；Preferably 0.8MPa-1.3MPa.
7. the process according to claim 1 for improving aromatic device low-grade utility efficiency, wherein the screw
Compressor is using the produced steam drive of aromatic device Low Temperature Thermal and/or uses electric drive.
8. the process according to any one of claims 1-7 for improving aromatic device low-grade utility efficiency,
In, the aromatic device include in para-xylene production unit, meta-xylene process units and ortho-xylene process units extremely
Few one kind.
9. a kind of aromatic device low-grade utility system, which is characterized in that the system includes that aromatic device produces Low Temperature Thermal facility, spiral shell
Rod-type compressor, steam superheating equipment, factory steam pipe network.
10. aromatic device low-grade utility system according to claim 9, wherein the system also includes steam drives
The driving motor of compressor turbine or compressor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810434045.8A CN110449096A (en) | 2018-05-08 | 2018-05-08 | A kind of process and aromatic device low-grade utility system improving aromatic device low-grade utility efficiency |
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| CN201810434045.8A CN110449096A (en) | 2018-05-08 | 2018-05-08 | A kind of process and aromatic device low-grade utility system improving aromatic device low-grade utility efficiency |
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Citations (6)
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|---|---|---|---|---|
| DE1568752A1 (en) * | 1965-03-24 | 1970-04-09 | Halcon International Inc | Process for the production of styrene from a reaction mixture obtained in the catalytic dehydrogenation of ethylbenzene |
| CN101968299A (en) * | 2010-10-29 | 2011-02-09 | 武善东 | Method for drying materials by utilizing superheated steam |
| CN104876789A (en) * | 2015-05-12 | 2015-09-02 | 山东齐鲁石化工程有限公司 | Crude styrene tower top heat recovery method and device |
| CN105008007A (en) * | 2012-11-22 | 2015-10-28 | 阿克森斯公司 | Method for recovering low-temperature heat and application of said method to an aromatic complex |
| CN105517682A (en) * | 2013-09-06 | 2016-04-20 | 株式会社大赛璐 | Method and plant for using recompressed vapor |
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2018
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1568752A1 (en) * | 1965-03-24 | 1970-04-09 | Halcon International Inc | Process for the production of styrene from a reaction mixture obtained in the catalytic dehydrogenation of ethylbenzene |
| CN101968299A (en) * | 2010-10-29 | 2011-02-09 | 武善东 | Method for drying materials by utilizing superheated steam |
| CN105008007A (en) * | 2012-11-22 | 2015-10-28 | 阿克森斯公司 | Method for recovering low-temperature heat and application of said method to an aromatic complex |
| CN105517682A (en) * | 2013-09-06 | 2016-04-20 | 株式会社大赛璐 | Method and plant for using recompressed vapor |
| CN104876789A (en) * | 2015-05-12 | 2015-09-02 | 山东齐鲁石化工程有限公司 | Crude styrene tower top heat recovery method and device |
| CN105669362A (en) * | 2016-03-14 | 2016-06-15 | 江苏乐科节能科技股份有限公司 | Trichloromethane solvent recovery heat pump rectification process |
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| Title |
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