CN206256008U - A kind of chilling system in the process for refining for acrylic acid - Google Patents
A kind of chilling system in the process for refining for acrylic acid Download PDFInfo
- Publication number
- CN206256008U CN206256008U CN201621359206.4U CN201621359206U CN206256008U CN 206256008 U CN206256008 U CN 206256008U CN 201621359206 U CN201621359206 U CN 201621359206U CN 206256008 U CN206256008 U CN 206256008U
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- China
- Prior art keywords
- chilling
- tower
- acrylic acid
- chilling tower
- refining
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Abstract
Chilling system in a kind of process for refining for acrylic acid that the utility model is provided, including circulating air drain sump, stripper, cooler, flash tank and chilling tower, the utility model carries out gas-liquid phase separation by flash tank to pending feed liquid first, the gaseous component for obtaining is entered into chilling tower, it is effectively controlled the flow of chilling tower charging aperture, the operational load of chilling tower is slow down, the operating condition of chilling tower is changed.The chilling system that the utility model is provided has that cold public work consumption is few, and Waste Water Treatment load value is low, obvious environment benefit, operating condition is gentle, system energy consumption is relatively low, the advantage such as system process efficiency is high, can effectively improve Business Economic Benefit.
Description
Technical field
The utility model is related to acrylic acid refining process technology field, more particularly to a kind of in acrylic acid process for refining
Chilling system.
Background technology
The resource added value of generation liquefied petroleum gas not high is raw material production propylene and acrylic acid one with petrochemical process
Body process program, with widening organic chemical industry's industrial chain, improve economic benefit and improve many advantages such as the market competitiveness.It is main
The flow is wanted to be：First, liquefied petroleum gas (more than 97% propane) preprocessed unit sloughs the pollutant and water in raw material, obtains
Fresh propane and recycled propane through level Four catalytic dehydrogenating reaction device, in the presence of Pt-Sn-NaLa/ZSM-5 catalyst, instead
Answer temperature to be converted into propylene for 640 DEG C or so, obtained after the compressed cryogenic unit of reactant and propylene refining cell processing of generation
Propylene, most of propylene enters that storage tank is for sale as product, and small part propylene enters acrylic acid oxidation unit, in Mo-Bi and
Under Mo-V catalyst actions, with ozone reaction generation crude acrylic acid, thick third in two-stage calandria type fixed bed reactor
Olefin(e) acid sequentially enters the propylene that light component separation circuit, acetic acid removing operation and acrylic acid purification process finally obtain higher degree
Acid.
In traditional production technology, the crude acrylic acid that propylene oxidation unit is obtained is cooled to necessarily by product cooler
Temperature, the low-pressure steam of by-product 0.2MPa；Chilling tower bottom is provided with cooler, by the charging of circulating water reduction chilling tower
Temperature, chilling and the absorption process of gas are all carried out in chilling tower, show as utility consumption big；In addition, chilling
The tail gas of top of tower only sub-fraction is recycled to propylene oxidation unit recycling, and major part is processed by catalytic burning system,
Resource circulation utilization inefficiency, and substantial amounts of low concentration wastewater is produced in the process, intractability is big, and environment is square with energy consumption etc.
Planar defect is obvious.
For above-mentioned technological problemses, in how optimizing propylene acid treating by the change of process technology scheme
Chilling system, the problem as urgent need to resolve.
The content of the invention
The purpose of this utility model is to provide the chilling system in a kind of process for refining for acrylic acid, is solved existing
The technical problem of presence.
To achieve the above object, the utility model uses following technical proposals：
Chilling system in a kind of process for refining for acrylic acid that the utility model is provided, including circulating air drain sump,
Flash tank and chilling tower, wherein, the charging aperture of the flash tank is connected with the discharging opening of pending feed liquid pipeline, the flash tank
Gaseous component discharging opening be connected with the charging aperture of chilling tower, the liquid phase component discharging opening of the flash tank is fractionated with light component is gone
Tower is connected；The tower top discharging opening of the chilling tower is connected with circulating air drain sump, the bottom of towe discharging opening of the chilling tower with go it is light
Component fractionation tower is connected.
Preferably, it is provided with cooling cyclic system on the discharging opening of the pending feed liquid pipeline and the connecting pipe of flash tank
System, the cooling recirculation system includes cooler, and the cooler is connected with stripper.
Preferably, the tower top of the chilling tower is connected with the bottom of towe of stripper, is used to waste water concentrate.
Preferably, the tower top of the chilling tower is additionally provided with desalination separator, the chilling tower and desalination separator
Connecting pipe on be provided with desalted water fluid filling pump, be provided with inhibition on the desalted water fluid filling pump and the connecting pipe of chilling tower
Agent interface.
Compared with prior art, the beneficial effects of the utility model are：
Chilling system in a kind of process for refining for acrylic acid that the utility model is provided, including circulating air drain sump,
Stripper, cooler, flash tank and chilling tower, the utility model carry out liquid phase point to pending feed liquid by flash tank first
From the gaseous component for obtaining is entered into chilling tower, is effectively controlled the flow of chilling tower charging aperture, slow down chilling tower
Operational load, changes the operating condition of chilling tower.
Further, before flash tank carries out gas-liquid phase separation to pending feed liquid, first by circulating cooling system pair
It carries out cooling treatment, can effectively reduce technological operation expense, reduces the consumption of recirculated cooling water.
Further, concentrate is carried out to the waste water that chilling column overhead is produced by setting stripper, effectively reduces system
The yield of waste water, reduces cost for wastewater treatment, obvious environment benefit.
Further, cooling circulating water consumption is reduced as the refrigerant of product cooler using stripper bottom of towe medium.
Further, the desalination separator for being set by chilling column overhead, it is therefore prevented that pending feed liquid is in chilling tower
Invention polymerisation.
In sum, the chilling system that the utility model is provided has cold public work consumption few, and Waste Water Treatment is born
Charge values are low, obvious environment benefit, and operating condition is gentle, and system energy consumption is relatively low, and it is excellent that system process efficiency is high etc.
Gesture, can effectively improve Business Economic Benefit.
Brief description of the drawings
Fig. 1 is the utility model acrylic acid emergency cooling process system schematic.
Wherein：1st, recycle gas compressor 2, circulating air drain sump 3, stripper 4, waste drains pump 5, cooler 6, flash distillation
Tank 7, rear pump 8, chilling tower 9, discharging pump 10, desalted water fluid filling pump 11, desalination separator.
Specific embodiment
In order to clearly illustrate the technical characterstic of this programme, the utility model is made with reference to the accompanying drawings and examples
Further instruction.
Chilling system in a kind of process for refining for acrylic acid that the utility model is provided, including recycle gas compressor 1,
Circulating air drain sump 2, stripper 3, waste drains pump 4, cooler 5, flash tank 6, rear pump 7, chilling tower 8, discharging pump 9, desalted water
Fluid filling pump 10 and desalination separator 11.
Wherein, the pending feed liquid is entered into through piping and cooled down in cooler 5, through pending after supercooling
Feed liquid is entered into carries out gas-liquid phase separation in flash tank 6, the gaseous component after separation delivers to chilling tower 8, and liquid phase component is through output
Pump 7 delivers to light component fractionating column.
An overhead product part in chilling tower 8 carries out gas-liquid again and is separated through circulating air drain sump 2, wherein, it is described
Gaseous component is delivered in blender after being compressed through recycle gas compressor 1；The liquid phase component is delivered to liquid waste treatment system and is carried out
Waste water concentrate；Another part of overhead product delivers to the bottom of towe of stripper 3 and enters to be separated in the chilling tower 8, by separating
The overhead components in stripper 3 afterwards carry out torch burning and process, and bottom of towe component passes through the waste drains pump being connected with the bottom of towe of stripper 3
4 are delivered to incineration of liquor system.
In order to prevent that polymerisation occurs in chilling tower 8, desalination separator 11 is installed in the tower top of chilling tower 8,
Desalted water fluid filling pump 10 is provided between chilling tower 8 and desalination separator 11.By de- after the treatment of desalination separator 11
Salt solution is mixed into the tower top of chilling tower 8 by desalted water fluid filling pump 10 and polymerization inhibitor again.
The bottom of towe of the stripper 3 is connected by pipeline with cooler 5, is used to make the recycling waste water of the bottom of towe of stripper 3
It is the cooling medium of cooler 5, meanwhile, the outlet temperature of cooler 5 is controlled at 65-70 DEG C.Flash tank 6 will be cooled to 65-
70 DEG C of component to be separated is flashed, and liquid phase component delivers to light component fractionating column through discharging pump 9, and gaseous component enters chilling tower
8, system effectively reduces the inlet amount and feeding temperature into chilling tower 8, saves washing desalination water.
In order to preferably carry out gas-liquid phase separation, at 58-62 DEG C, bottom temperature control exists the control of the tower top temperature of chilling tower 8
55-72 DEG C, the tower top pressure of stripper 3 is controlled in 0.011MPa, and tower reactor Stress control is in 0.014MPa.
The column bottom temperature norm controlling of chilling tower 8 at 55-72 DEG C, meanwhile, by flash tank 6 gas phase extraction temperature control exist
In in the close scope of the column bottom temperature index of chilling tower 8 so that need not be set cooling is carried out by the gaseous component in flash tank 6
Standby cooling reduces the consumption of recirculated water.
The tower top portion gas of chilling tower 8 operate medium, effective concentrate waste water to save steam consumption as the air lift of stripper 3.
Traditional acrylic acid process for refining chilling system, the operational load of chilling tower 8 is big, and the bottom of towe of chilling tower 8 is provided with cooling
Device, circulating cooling water consumption is greatly increased, not yet in effect to waste liquid concentrate in process for treating waste liquor, considerably increases waste water system
Operating cost, be unfavorable for efficient, green, environmentally friendly production.
Technical characteristic of the utility model without description can be achieved by the prior art, and will not be repeated here.Certainly, on
It is not that, to limitation of the present utility model, the utility model is also not limited to the example above, the common skill of the art to state bright
The done change in essential scope of the present utility model of art personnel, remodeling, addition are changed, and should also belong to the utility model
Protection domain.
Claims (4)
1. the chilling system in a kind of process for refining for acrylic acid, it is characterised in that：Including circulating air drain sump (2), flash distillation
Tank (6) and chilling tower (8), wherein, the charging aperture of the flash tank (6) is connected with the discharging opening of pending feed liquid pipeline, described
The gaseous component discharging opening of flash tank (6) is connected with the charging aperture of chilling tower (8), the liquid phase component discharging of the flash tank (6)
Mouth is connected with light component fractionating column is removed；The tower top discharging opening of the chilling tower (8) is connected with circulating air drain sump (2), the urgency
The bottom of towe discharging opening of cold tower (8) is connected with light component fractionating column is removed.
2. the chilling system in a kind of process for refining for acrylic acid according to claim 1, it is characterised in that：It is described to treat
Process and be provided with cooling recirculation system, the cooling cyclic system on the discharging opening of feed liquid pipeline and the connecting pipe of flash tank (6)
System includes cooler (5), and the cooler (5) is connected with stripper (3).
3. the chilling system in a kind of process for refining for acrylic acid according to claim 2, it is characterised in that：The urgency
The tower top of cold tower (8) is connected with the bottom of towe of stripper (3), is used to waste water concentrate.
4. the chilling system in a kind of process for refining for acrylic acid according to claim 1, it is characterised in that：The urgency
The tower top of cold tower (8) is additionally provided with the connecting tube of desalination separator (11), the chilling tower (8) and desalination separator (11)
Desalted water fluid filling pump (10) is provided with road, is provided with the desalted water fluid filling pump (10) and the connecting pipe of chilling tower (8)
Polymerization inhibitor interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359206.4U CN206256008U (en) | 2016-12-12 | 2016-12-12 | A kind of chilling system in the process for refining for acrylic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621359206.4U CN206256008U (en) | 2016-12-12 | 2016-12-12 | A kind of chilling system in the process for refining for acrylic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206256008U true CN206256008U (en) | 2017-06-16 |
Family
ID=59028844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621359206.4U Expired - Fee Related CN206256008U (en) | 2016-12-12 | 2016-12-12 | A kind of chilling system in the process for refining for acrylic acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206256008U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218143A (en) * | 2018-03-03 | 2019-09-10 | 榆林学院 | A kind of deep cooling transformation economic benefits and social benefits separation system in propylene production technology |
| CN112957864A (en) * | 2021-02-04 | 2021-06-15 | 华能（天津）煤气化发电有限公司 | Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage |
-
2016
- 2016-12-12 CN CN201621359206.4U patent/CN206256008U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218143A (en) * | 2018-03-03 | 2019-09-10 | 榆林学院 | A kind of deep cooling transformation economic benefits and social benefits separation system in propylene production technology |
| CN110218143B (en) * | 2018-03-03 | 2023-12-15 | 榆林学院 | Cryogenic pressure-variable double-effect separation device in propylene production process |
| CN112957864A (en) * | 2021-02-04 | 2021-06-15 | 华能（天津）煤气化发电有限公司 | Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage |
| CN112957864B (en) * | 2021-02-04 | 2022-03-25 | 华能（天津）煤气化发电有限公司 | Flying ash filtering system for preventing flying ash from entering torch after filter stick breakage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170616 Termination date: 20171212 |