CN110508022A - The device and method of on-condensible gas control rectifying tower pressure is not utilized - Google Patents
The device and method of on-condensible gas control rectifying tower pressure is not utilized Download PDFInfo
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- CN110508022A CN110508022A CN201910963208.6A CN201910963208A CN110508022A CN 110508022 A CN110508022 A CN 110508022A CN 201910963208 A CN201910963208 A CN 201910963208A CN 110508022 A CN110508022 A CN 110508022A
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- setting value
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000004821 distillation Methods 0.000 claims abstract description 16
- 239000000498 cooling water Substances 0.000 claims description 7
- 238000001514 detection method Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 20
- 239000002994 raw material Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
-
- 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
Abstract
The present invention relates to the device and method that one kind does not utilize on-condensible gas control rectifying tower pressure, the first-stage condenser of the present apparatus and the connecting pipeline of return tank are equipped with the first regulating valve；The connecting pipeline of first-stage condenser and secondary condenser is equipped with the second regulating valve；The connecting pipeline of secondary condenser and exhaust system is equipped with third regulating valve.The present invention is different from the existing device by being passed through incondensable gas or overhead condenser emptying control tower pressure to tower top, it does not have incondensable gas in control process and enters distillation system reduction loss of material, simultaneously because adjustment amplitude of the present apparatus to rectifying tower system pressure is small, the fluctuation of adjustment process pressure tower is small, distillation system operation is more stable, is particularly suitable for the distillation process of high-purity chemicals and high level chemicals.
Description
Technical field
The present invention relates to the device and methods that one kind does not utilize on-condensible gas control rectifying tower pressure, belong to distillation system control
Technical field processed.
Background technique
Currently, the voltage-controlled system of the tower of rectifying column is usually that non-condensing gas is added into tower from tower top when tower is forced down in setting value
Body improves tower pressure (as shown in Figure 1)；A part of gas group is discharged from overhead condenser to exhaust system when tower pressure is higher than setting value
Point, reduce tower pressure.But the various industries such as modern times ultra pure chemicals, semiconductor are quickly grown, and many industries are all to utilize chemistry
Product require impure amount in raw material extremely low as raw material, meanwhile, because there are chemical raw material risk is huge for multiple industries
Greatly, situations such as processing difficulty is high, raw material value is very big, and most chemical industry purification process will rely on rectifying, tradition
Rectifying column pressure control device can not adapt to extraordinary chemical process at this stage, being badly in need of one kind can adapt to various fine chemistry industries
The tower pressure control device and method of process.
Summary of the invention
The technical problem to be solved in the present invention is to provide one kind do not utilize on-condensible gas control rectifying tower pressure device and
Method, to adapt to the voltage-controlled system of tower of various fine chemistry industry processes.
The technical solution used to solve the technical problems of the present invention is that:
It is a kind of do not utilize on-condensible gas control rectifying tower pressure device, including rectifying column, first-stage condenser, secondary condenser,
The connecting pipeline of return tank, first-stage condenser and return tank is equipped with the first regulating valve；First-stage condenser and secondary condenser
Connecting pipeline is equipped with the second regulating valve；The connecting pipeline of secondary condenser and exhaust system is equipped with third regulating valve.
The control method of the above-mentioned device for not utilizing on-condensible gas control rectifying tower pressure, sequentially includes the following steps:
(1) Rectification column pressure P1 < setting value:
The operation of S1, DCS control system detection system and valve state, gradually turn third down if third regulating valve does not completely close
The aperture of regulating valve, if Rectification column pressure P1 is incrementally increased close to setting value during third control valve opening reduces, then this is adjusted
Section process terminates；If Rectification column pressure P1 does not increase to setting value still, persistently reduce third control valve opening until third
Regulating valve completely closes；
S2 turns the second regulating valve down if third regulating valve completely closes rear Rectification column pressure P1 and do not increase to setting value still
Aperture, if the second control valve opening reduce during, Rectification column pressure P1 is incrementally increased close to setting value, then this adjustment process
It terminates；If Rectification column pressure P1 does not increase to setting value still, persistently reduce the second control valve opening until the second regulating valve
It completely closes；
S3 turns the first regulating valve down if the second regulating valve completely closes rear Rectification column pressure P1 and do not increase to setting value still
Aperture, reduce the condensing capacity of first-stage condenser, reduce the condensing rate of tower top material, Rectification column pressure is made to increase to setting
Value；
(2) Rectification column pressure P1 > setting value:
The operation of S4, DCS control system detection system and valve state, incrementally increase first if the first regulating valve does not fully open
The aperture of regulating valve, if Rectification column pressure P1 is gradually reduced close to setting value during the first control valve opening increases, then this is adjusted
Section process terminates；If Rectification column pressure P1 is not reduced to setting value still, persistently increase the first control valve opening until first
Regulating valve fully opens；
S5 increases by the second regulating valve if the first regulating valve fully opens rear Rectification column pressure P1 and is not reduced to setting value still
Aperture, if the second control valve opening increase during, Rectification column pressure P1 is gradually reduced close to setting value, then this adjustment process
It terminates；If Rectification column pressure P1 is not reduced to setting value still, persistently increase the second control valve opening until the second regulating valve
It fully opens；
S6 increases third regulating valve if the second regulating valve fully opens rear Rectification column pressure P1 and is not reduced to setting value still
Aperture, the gas that the top of the distillation column can not condense is emitted into exhaust system, rectifying tower system incondensable gas is reduced
Absolute magnitude makes Rectification column pressure be reduced to setting value.
The present invention by adopting the above technical scheme, compared with prior art, beneficial effect is:
The process of present apparatus control tower pressure is different from existing by being passed through incondensable gas or overhead condenser emptying to tower top
The device of control tower pressure is not have incondensable gas on the basis of original device in control process and enter rectifying system
System reduces loss of material, while because adjustment amplitude of the present apparatus to rectifying tower system pressure is small, and adjustment process pressure tower fluctuation is small,
Distillation system operation is more stable.
Preferably, the further technical solution of the present invention is:
Step S1, in S4, the DCS system detection system operation and valve state indicate: tower bottom of rectifying tower reboiler steams
Hair amount is normal, and the top of the distillation column condenser circulating cooling water consumption is normal, and overhead reflux amount is normal, without except condenser condensing capacity
And exist the case where other influences tower pressure except tower top emptying amount.
In step S1, it is 0.2MPa that rectifying column, which controls pressure, and it is 0.18MPa that secondary condenser, which controls pressure, and rectifying column is real
When the pressure P1 < 0.2MPa of border, preferential selection reduces third control valve opening until closing.
The pipeline that distillation system discharge gas to outside system is preferentially closed when Rectification column pressure is low, not first
Time, incondensable gas was added into distillation system, and such way ensure that the content for reducing impurity composition in distillation system,
It ensure that the purity of material in distillation system, while having saved the investment and pipeline laying cost of incoagulable gas again.
In step S2, it is 0.2MPa that first-stage condenser, which controls pressure, and it is 0.18MPa, level-one that secondary condenser, which controls pressure,
Condenser, secondary condenser use shell-and-tube heat exchanger, and circulation cooling water is in tube side, and the material that is condensed is in shell side, one
Preferentially use first-stage condenser as tower top material condensing unit in the grade enough situations of condenser condensing capacity.
It is used using shell-and-tube heat exchanger as condenser, is condensed material in shell side, material can be because after being condensed
Condenser bottom is fallen under gravity, is guaranteed that top heat exchanger tube and material gas there are enough attaching spaces, is effectively ensured
Heat exchange efficiency, first-stage condenser is identical with secondary condenser control pressure in other currently existing devices, and either level-one is cold
Condenser or secondary condenser are to use at full capacity in production, and the consumption of the recirculated cooling water in condenser is compared
Greatly, the especially circulatory mediator of secondary condenser low temperature.Present apparatus first-stage condenser and secondary condenser control pressure have one
Difference carries out the condensation of material in practical application using first-stage condenser to greatest extent, reduces the cooling of secondary condenser and is situated between
Matter dosage, can be obvious energy saving.
In step S3, it is 0.2MPa that first-stage condenser, which controls pressure, and it is 0.2MPa, return tank and two that return tank, which controls pressure,
It is the U-shaped curved of h that the connecting pipeline of grade condenser, which is equipped with one section of height, and the pressure difference between return tank and secondary condenser passes through
U-shaped curved realization.
Be arranged it is U-shaped it is curved have any different to increase between return tank and secondary condenser in other devices press communicating pipe, make back
Gaseous phase materials can be freely accessible to exchange heat in secondary condenser in stream tank, and return tank and secondary condenser are separately controlled relatively
System, using the cooling capacity of first-stage condenser, reduces secondary condenser if having gas that will preferentially enter first-stage condenser in return tank
The consumption of refrigerant.
Further, in step S4, it is 0.2MPa that rectifying column, which controls pressure, excellent when rectifying column actual pressure P1 > 0.2MPa
First increase the first control valve opening, increases the condensing capacity of first-stage condenser.
It preferentially selects to use low value refrigerant as cooling medium in control process, the work for not increasing secondary condenser is negative
Lotus reduces operation consumption.
In step S5, it is 0.18MPa that secondary condenser, which controls pressure, when rectifying column actual pressure P1 > 0.2MPa, preferentially
Increase by the second control valve opening, come into operation secondary condenser.
In the case where first-stage condenser is unable to control tower pressure, the secondary condenser that comes into operation preferentially is selected, it is lower using temperature
Refrigerant material is condensed out, rather than be vented, lose material.
In step S6, third regulating valve can not be still dropped after the adjustment of the first regulating valve and the second regulating valve
It is opened after low Rectification column pressure, the gas collection after emptying to exhaust system, exhaust system increases material collector recovery section
Material.
Detailed description of the invention
Fig. 1 is existing rectifying tower pressure control device schematic diagram；
Fig. 2 is the schematic device for not utilizing on-condensible gas control rectifying tower pressure of the invention；
In figure: 1, rectifying column；2, first-stage condenser；3, secondary condenser 4, return tank；5, the first regulating valve；6, it second adjusts
Valve；7, third regulating valve；8, U-shaped curved.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 2, it is a kind of do not utilize on-condensible gas control rectifying tower pressure device, by rectifying column 1, first-stage condenser 2,
Secondary condenser 3, return tank 4, the first regulating valve 5, the second regulating valve 6, third regulating valve 7, U-shaped curved 8 composition, first-stage condenser
2 are equipped with the first regulating valve 5 with the connecting pipeline of return tank 4；It is set on first-stage condenser 2 and the connecting pipeline of secondary condenser 3
There is the second regulating valve 6；The connecting pipeline of secondary condenser 3 and exhaust system is equipped with third regulating valve 7；Return tank 4 and second level
The connecting pipeline of condenser 3 is equipped with U-shaped curved 8 of the pressure difference between control return tank 4 and secondary condenser 3.
The control method of the above-mentioned device for not utilizing on-condensible gas control rectifying tower pressure, sequentially includes the following steps:
(1) 1 pressure P1 < setting value of rectifying column.
S1, it is 0.2MPa that rectifying column 1, which controls pressure, and actual pressure 0.183MPa, DCS control system detects distillation system
Operating status: 1 tower reactor reboiler evaporation capacity of rectifying column is normal, and 1 overhead condenser circulating cooling water consumption of rectifying column is normal, tower top
Regurgitant volume is normal, and 7 aperture of third regulating valve is 55%, and control system gradually reduces 7 aperture of third regulating valve, essence in adjustment process
1 pressure P1 of tower rising is evaporated, but does not increase to setting value 0.2MPa, 7 aperture of third regulating valve persistently reduces until closing, rectifying column
1 pressure P1 increases to 0.19MPa；
S2, third regulating valve 7 completely close rear 1 pressure P1 of rectifying column and do not increase to 0.2MPa still, and control system gradually reduces
Second regulating valve, 6 aperture, 1 pressure P1 of rectifying column rises in adjustment process, does not increase to 0.2MPa still, the second regulating valve 6 is opened
Degree is lasting to be reduced until closing, and 1 pressure P1 of rectifying column increases to 0.197Mpa；
S3, the second regulating valve 6 completely close rear 1 pressure P1 of rectifying column and do not increase 0.2MPa still, and control system gradually reduces
First regulating valve, 5 aperture makes to retain a part of liquid material in first-stage condenser 2, and liquid material submerges a part of heat exchanger tube, subtracts
The small condensing capacity of first-stage condenser 2,1 pressure P1 of rectifying column are gradually increasing, when 5 aperture regulation of the first regulating valve is to 85%, essence
It evaporates 1 pressure of tower and increases to 0.2MPa and stabilization.
(2) 1 pressure > setting value of rectifying column.
S4, it is 0.2MPa that rectifying column 1, which controls pressure, and actual pressure 0.24MPa, DCS control system detects distillation system
Operating status: 1 tower reactor reboiler evaporation capacity of rectifying column is normal, and 1 overhead condenser circulating cooling water consumption of rectifying column is normal, tower top
Regurgitant volume is normal, and 5 aperture of the first regulating valve is 65%, and control system incrementally increases 5 aperture of the first regulating valve, essence in adjustment process
1 pressure P1 of tower reduction is evaporated, but is not reduced to 0.2MPa, 5 aperture of the first regulating valve persistently increases until closing, 1 pressure of rectifying column
It is reduced to 0.225MPa；
S5 adjusts the first regulating valve 5 to fully open rear 1 pressure P1 of rectifying column and is not reduced to 0.2MPa still, and control system gradually increases
Big second regulating valve, 6 aperture, 1 pressure P1 of rectifying column decline, is not reduced to 0.2MPa, the second regulating valve 6 still in adjustment process
Aperture persistently increases until standard-sized sheet, 1 pressure P1 of rectifying column are reduced to 0.208MPa；
S6, the second regulating valve 6 fully open rear 1 pressure P1 of rectifying column and are not reduced to 0.2MPa still, and control system incrementally increases
7 aperture of third regulating valve makes distillation system inner part gaseous component be discharged into exhaust system, and 1 pressure of rectifying column is gradually reduced, the
When three regulating valves, 7 aperture regulation is to 12%, 1 pressure of rectifying column is reduced to 0.2MPa and stabilization.
The voltage-controlled numerical value processed of tower in the present embodiment, it is contemplated that the difference of the scale of equipment, rectifying medium can have phase
The variation answered.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form.It is all
It is any simple modification, equivalent change and modification to the above embodiments according to the technical essence of the invention, belongs to this
In the technical proposal scope of invention.
Claims (9)
1. one kind does not utilize the device of on-condensible gas control rectifying tower pressure, including rectifying column, first-stage condenser, B-grade condensation
Device, return tank, it is characterised in that: the connecting pipeline of first-stage condenser and return tank is equipped with the first regulating valve；First-stage condenser
The second regulating valve is equipped with the connecting pipeline of secondary condenser；The connecting pipeline of secondary condenser and exhaust system is equipped with the
Three regulating valves.
2. a kind of control method for the device for not utilizing on-condensible gas control rectifying tower pressure as described in claim 1, special
Sign is, sequentially includes the following steps:
(1) Rectification column pressure P1 < setting value:
The operation of S1, DCS control system detection system and valve state, gradually turn third down if third regulating valve does not completely close
The aperture of regulating valve, if Rectification column pressure P1 is incrementally increased close to setting value during third control valve opening reduces, then this is adjusted
Section process terminates；If Rectification column pressure P1 does not increase to setting value still, persistently reduce third control valve opening until third
Regulating valve completely closes；
S2 turns the second regulating valve down if third regulating valve completely closes rear Rectification column pressure P1 and do not increase to setting value still
Aperture, if the second control valve opening reduce during, Rectification column pressure P1 is incrementally increased close to setting value, then this adjustment process
It terminates；If Rectification column pressure P1 does not increase to setting value still, persistently reduce the second control valve opening until the second regulating valve
It completely closes；
S3 turns the first regulating valve down if the second regulating valve completely closes rear Rectification column pressure P1 and do not increase to setting value still
Aperture, reduce the condensing capacity of first-stage condenser, reduce the condensing rate of tower top material, Rectification column pressure is made to increase to setting
Value；
(2) Rectification column pressure P1 > setting value:
The operation of S4, DCS control system detection system and valve state, incrementally increase first if the first regulating valve does not fully open
The aperture of regulating valve, if Rectification column pressure P1 is gradually reduced close to setting value during the first control valve opening increases, then this is adjusted
Section process terminates；If Rectification column pressure P1 is not reduced to setting value still, persistently increase the first control valve opening until first
Regulating valve fully opens；
S5 increases by the second regulating valve if the first regulating valve fully opens rear Rectification column pressure P1 and is not reduced to setting value still
Aperture, if the second control valve opening increase during, Rectification column pressure P1 is gradually reduced close to setting value, then this adjustment process
It terminates；If Rectification column pressure P1 is not reduced to setting value still, persistently increase the second control valve opening until the second regulating valve
It fully opens；
S6 increases third regulating valve if the second regulating valve fully opens rear Rectification column pressure P1 and is not reduced to setting value still
Aperture, the gas that the top of the distillation column can not condense is emitted into exhaust system, rectifying tower system incondensable gas is reduced
Absolute magnitude makes Rectification column pressure be reduced to setting value.
3. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: step S1, in S4, the DCS system detection system operation and valve state indicate: tower bottom of rectifying tower reboiler steams
Hair amount is normal, and the top of the distillation column condenser circulating cooling water consumption is normal, and overhead reflux amount is normal, without except condenser condensing capacity
And exist the case where other influences tower pressure except tower top emptying amount.
4. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: in step S1, it is 0.2MPa that rectifying column, which controls pressure, and it is 0.18MPa, the practical pressure of rectifying column that secondary condenser, which controls pressure,
When power P1 < 0.2MPa, preferential selection reduces third control valve opening until closing.
5. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: in step S2, it is 0.2MPa that first-stage condenser, which controls pressure, and it is 0.18MPa, level-one condensation that secondary condenser, which controls pressure,
Device, secondary condenser use shell-and-tube heat exchanger, and for circulation cooling water in tube side, the material that is condensed is cold in level-one in shell side
Preferentially use first-stage condenser as tower top material condensing unit in the enough situations of condenser condensing capacity.
6. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: in step S3, it is 0.2MPa that first-stage condenser, which controls pressure, and it is 0.2MPa, return tank and second level that return tank, which controls pressure,
It is the U-shaped curved of h that the connecting pipeline of condenser, which is equipped with one section of height, and the pressure difference between return tank and secondary condenser passes through U
The curved realization of type.
7. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: in step S4, it is 0.2MPa that rectifying column, which controls pressure, when rectifying column actual pressure P1 > 0.2MPa, preferentially increases first
Control valve opening increases the condensing capacity of first-stage condenser.
8. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: in step S5, it is 0.18MPa that secondary condenser, which controls pressure, preferential to increase when rectifying column actual pressure P1 > 0.2MPa
Second control valve opening, come into operation secondary condenser.
9. the control method of the device according to claim 2 for not utilizing on-condensible gas control rectifying tower pressure, feature
Be: in step S6, third regulating valve is can not still to reduce essence after the adjustment of the first regulating valve and the second regulating valve
It is opened after evaporating pressure tower, the gas collection after emptying to exhaust system, exhaust system increases material collector recovery section material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963208.6A CN110508022A (en) | 2019-10-11 | 2019-10-11 | The device and method of on-condensible gas control rectifying tower pressure is not utilized |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910963208.6A CN110508022A (en) | 2019-10-11 | 2019-10-11 | The device and method of on-condensible gas control rectifying tower pressure is not utilized |
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| Publication Number | Publication Date |
|---|---|
| CN110508022A true CN110508022A (en) | 2019-11-29 |
Family
ID=68634335
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910963208.6A Pending CN110508022A (en) | 2019-10-11 | 2019-10-11 | The device and method of on-condensible gas control rectifying tower pressure is not utilized |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109745943A (en) * | 2019-02-27 | 2019-05-14 | 天津金牛电源材料有限责任公司 | Pressure security control equipment and control method in difluorophosphate preparation process |
| CN114602403A (en) * | 2022-03-18 | 2022-06-10 | 濮阳市联众兴业化工有限公司 | Overhead reflux tank of hydration reaction tower and use method thereof |
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|---|---|---|---|---|
| WO2000060293A1 (en) * | 1999-04-05 | 2000-10-12 | Air Liquide Japan, Ltd. | Method and device for producing ultra-pure gas |
| CN101380522A (en) * | 2008-10-15 | 2009-03-11 | 天津大学 | Compression rectification device and method |
| CN204233807U (en) * | 2014-11-25 | 2015-04-01 | 北京石油化工工程有限公司 | A kind of thermal bypass rectifying tower top control pressurer system |
| CN206751705U (en) * | 2017-04-12 | 2017-12-15 | 恒力石化（大连）有限公司 | PTA device oxidation system improved structures |
| CN209333235U (en) * | 2018-11-08 | 2019-09-03 | 山东三丰新材料有限公司 | A kind of extraction structure of novel distillation system |
-
2019
- 2019-10-11 CN CN201910963208.6A patent/CN110508022A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000060293A1 (en) * | 1999-04-05 | 2000-10-12 | Air Liquide Japan, Ltd. | Method and device for producing ultra-pure gas |
| CN101380522A (en) * | 2008-10-15 | 2009-03-11 | 天津大学 | Compression rectification device and method |
| CN204233807U (en) * | 2014-11-25 | 2015-04-01 | 北京石油化工工程有限公司 | A kind of thermal bypass rectifying tower top control pressurer system |
| CN206751705U (en) * | 2017-04-12 | 2017-12-15 | 恒力石化（大连）有限公司 | PTA device oxidation system improved structures |
| CN209333235U (en) * | 2018-11-08 | 2019-09-03 | 山东三丰新材料有限公司 | A kind of extraction structure of novel distillation system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109745943A (en) * | 2019-02-27 | 2019-05-14 | 天津金牛电源材料有限责任公司 | Pressure security control equipment and control method in difluorophosphate preparation process |
| CN114602403A (en) * | 2022-03-18 | 2022-06-10 | 濮阳市联众兴业化工有限公司 | Overhead reflux tank of hydration reaction tower and use method thereof |
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