CN104848737B - Reactor crosses the method for cleaning of top condenser - Google Patents
Reactor crosses the method for cleaning of top condenser Download PDFInfo
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- CN104848737B CN104848737B CN201510237094.9A CN201510237094A CN104848737B CN 104848737 B CN104848737 B CN 104848737B CN 201510237094 A CN201510237094 A CN 201510237094A CN 104848737 B CN104848737 B CN 104848737B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 claims abstract description 46
- 239000004743 Polypropylene Substances 0.000 claims abstract description 41
- 229920001155 polypropylene Polymers 0.000 claims abstract description 40
- -1 polypropylene Polymers 0.000 claims abstract description 39
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 28
- 238000010926 purge Methods 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims description 13
- 150000001336 alkenes Chemical class 0.000 claims description 2
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Cleaning In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The present invention provides the method for cleaning that a kind of reactor crosses top condenser.Polypropylene production system using the method for cleaning includes that reactor crosses top condenser and reactor crosses top separator, and reactor, which crosses top condenser and crosses top separator with reactor, to be connected to, and is included the following steps：Step S1：Keep polypropylene production system out of service, and reactor crossed into top condenser and reactor crosses top separator from polypropylene production system and be isolated；Step S2：When crossing top condenser to reactor and clearing up, reactor is crossed into top separator and is connected to nitrogen delivery pipe road, the normal pressure for being pressurized to polypropylene production system is carried out to cross top separator to reactor using compressed nitrogen, wherein；Step S3：Top condenser is crossed to reactor to purge, and is vented by crossing the blowdown piping that top condenser is connected with reactor.It applies the technical scheme of the present invention, improves the working efficiency for crossing top condenser cleaning to reactor, also just improve the production efficiency of polypropylene product.
Description
Technical field
The present invention relates to PP Production Technology fields, and the cleaning of top condenser is crossed in particular to a kind of reactor
Method.
Background technology
As shown in Figure 1, in producing polyacrylic Innovene techniques, it is device that the reactor of system, which crosses top condenser 1,
One of core equipment.The gas come from system upstream still contains a small amount of polypropylene powder after the separation of cyclone separator 2
Dirt, oligomer (oils), these substances enter reactor and cross flows decrease after top condenser 1, and temperature reduces.System is passed through
The pipe side (processing medium side) that prolonged operation post-reactor crosses top condenser 1 is easy for fouling, to cause reactor mistake
It pushes up 1 heat exchange efficiency of condenser to decline, then causes the produce load ability of system and device to decline indirectly, finally influence target product
Yield.After the heat exchange efficiency that reactor crosses top condenser 1 declines to a certain extent, it is necessary to which staff is to system-down
Top condenser 1 is crossed to reactor afterwards to clear up.
Existing cleaning way is：After system-down, reactor is crossed top condenser 1 from system and device by staff
It isolates, and other devices of system (cyclone separator 2, separator 3 and recycle gas compressor 4) is isolated and are closed, to keep away
Exempt from raw materials for production leakage；Then it is anti-into opening after line replacement qualification to cross top condenser 1 to the reactor isolated by staff
It answers device to cross the end socket at top 1 both ends of condenser, is dredged and restrained with giant at the end socket that reactor crosses top condenser 1, is used in combination
Instrument wind dries up.Since the equipment size that reactor crosses top condenser 1 is larger, the difficulty of the cleaning work of staff and work
Amount is very big, therefore the time that cleaning work carries out is longer (needing the cleaning work time by shutting down 4-5 days every time).Thus
Cross that the top time cleared up of condenser 1 is longer to reactor using the method for cleaning of the prior art, system stop production when
Between it is also just longer, cleaning work efficiency is low, also affects the production efficiency of system production polypropylene product.
Invention content
The main purpose of the present invention is to provide the method for cleaning that a kind of reactor crosses top condenser, to solve the prior art
In to reactor cross top condenser carry out fouling cleaning time it is longer, so as to cause system stop production time it is longer, shadow
The problem of ringing polypropylene product production efficiency.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of reactor crosses the clear of top condenser
Reason method, wherein the polypropylene production system using the method for cleaning includes that reactor crosses top condenser and reactor crosses top point
From device, reactor, which crosses top condenser and crosses top separator with reactor, to be connected to, and is included the following steps：
Step S1：Keep polypropylene production system out of service, and reactor crossed into top condenser crosses top with reactor and detach
Device is isolated from polypropylene production system；
Step S2：When crossing top condenser to reactor and clearing up, reactor is crossed top separator, and to be connected to nitrogen defeated
Pipeline is sent, the normal pressure for being pressurized to polypropylene production system is carried out to cross top separator to reactor using compressed nitrogen；
Step S3：Top condenser is crossed to reactor to purge, and by crossing putting of being connected of top condenser with reactor
Blank pipe road is vented.
Further, between step S2 and step S3 further include step S21：Top condenser is crossed to reactor to let out
Pressure makes the pressure P that reactor is crossed in the condenser of top be reduced to predetermined pressure.
Further, predetermined pressure is more than or equal to 0.4Mpa, is less than or equal to 0.7MPa.
Further, polypropylene production system further includes cyclone separator and recycle gas compressor, cyclone separator, reaction
Device crosses top condenser, reactor is crossed top separator and is sequentially connected to by connecting line with recycle gas compressor, is carrying out step S1
During step S2, so that reactor is crossed top condenser and reactor are crossed on the connecting line between pushing up separator first and control
Valve processed remains off；During carrying out step S3, the first control valve is made to keep it turned on.
Further, during carrying out step S3, while making the first control valve keep it turned on, make to put
Second control valve of blank pipe road is kept it turned on.
Further, during carrying out step S1, by close cyclone separator and reactor cross top condenser it
Between connecting line on third control valve door and reactor cross top separator and recycle gas compressor between connecting line
On the 4th control valve make that reactor crosses top condenser and reactor is crossed top separator and isolated from polypropylene production system
Come.
Further, during carrying out step S3, by connection blowdown piping and reactor cross top condenser it
Between temperature transmitter the temperature of compressed nitrogen is monitored, when the temperature of compressed nitrogen be less than zero degrees celsius when stop operation
Step S3.
It applies the technical scheme of the present invention, is shut down polypropylene production system by confirming, and reactor is crossed into top condensation
Device and separator are isolated from polypropylene production system, and top condenser end cover is crossed to it without dismantling reactor to realize
The purpose cleared up simplifies the course of work that top condenser cleaning is crossed to reactor.Staff is using compressed nitrogen to anti-
It answers device to cross top condenser and carries out purging cleaning, the fouling purging that reactor is crossed in the condenser of top is cleaned out, to improve reaction
Device crosses the heat exchange efficiency of top condenser.It applies the technical scheme of the present invention, staff crosses top using compressed nitrogen to reactor
Condenser carries out purging cleaning and replaces in the prior art by crossing the mistake that top condenser is cleared up to reactor with giant
Journey can shorten the cleaning work time that top condenser is crossed to reactor, can contract from original 4-5 days cleaning work time
Short is the cleaning work time for only needing 1 day, also just shortens the downtime of polypropylene production system, to improve to reaction
Device crosses the working efficiency of top condenser cleaning, also just improves the production efficiency of polypropylene product.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows polypropylene operation system structure schematic diagram in the prior art；And
Fig. 2 shows the polypropylene lifes that reactor according to the present invention crosses the embodiment application of the method for cleaning of top condenser
Produce system structure diagram.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, cyclone separator；20, reactor crosses top condenser；
30, reactor crosses top separator；40, recycle gas compressor；
50, temperature transmitter；21, water inlet；
22, water outlet.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Fig. 2, the production of propylene system applied in technical scheme of the present invention includes cyclone separator 10, reaction
Device crosses top condenser 20, reactor crosses top separator 30 and recycle gas compressor 40.Cyclone separator 10, reactor cross top condensation
Device 20, reactor cross top separator 30 and recycle gas compressor 40 passes through pipeline connection, wherein reactor cross top condenser 20 with
Reactor is crossed between top separator 30 and is connected to two, lower connector road connecting line by upper connector road, and top is crossed from reactor
The gaseous substance exported in condenser 20 from upper connector road export, from reactor cross top condenser 20 export liquid phase substance from
Lower connector road exports.It is both provided with the first control valve on upper connector road and lower connector road.In cyclone separator 10
It is crossed between top condenser 20 with reactor and adds a blowdown piping on connecting line, and be provided with the 5th on blowdown piping
Control valve.Preferably, upper connector road and lower connector road include that there are two control valves；5th control valve includes
Two control valves.It may insure normally or the partition of each pipeline in this way.It is cold that cyclone separator 10 and reactor cross top
Third control valve door is provided on the connecting line in 10 exit of close cyclone separator between condenser 20, reactor crosses top point
The 4th control is provided on connecting line from 40 entrance of close recycle gas compressor between device 30 and recycle gas compressor 40
Valve.
According to an embodiment of the invention, the method for cleaning that a kind of reactor crosses top condenser 20 is provided.The reactor mistake
The method for cleaning of top condenser 20 includes the following steps：
Step S1：Confirm that polypropylene production system is shut down, and reactor crossed into top condenser 20 crosses top with reactor and detach
Device 30 is isolated from polypropylene production system；
Step S2：When crossing top condenser 20 to reactor and clearing up, reactor is crossed into top separator 30 and is connected to nitrogen
Transfer pipeline carries out the positive normal pressure for being pressurized to polypropylene production system to cross top separator 30 to reactor using compressed nitrogen
Power；
Step S3：Top condenser 20 is crossed to reactor to purge, and is connected by crossing top condenser 20 with reactor
Blowdown piping be vented.
Confirm that polypropylene production system is shut down, and reactor is crossed into top condenser 20 and reactor crosses top separator 30 from poly-
It is isolated in production of propylene system, to realize without crossing reactor after the end socket of top condenser 20 disassembles again to it
The purpose cleared up simplifies and crosses the course of work that top condenser 20 is cleared up to reactor.Staff utilizes compressed nitrogen pair
Reactor crosses top condenser 20 and carries out purging cleaning, the fouling purging that reactor is crossed in the condenser 20 of top is cleaned out, to carry
High reactor crosses the heat exchange efficiency of top condenser 20.It applies the technical scheme of the present invention, staff is using compressed nitrogen to anti-
It answers device to cross top condenser 20 and carries out purging cleaning replacement in the prior art by crossing top condenser 20 to reactor with giant
The process cleared up can shorten the cleaning work time that top condenser 20 is crossed to reactor, can be from original 4-5 days
The cleaning work time shorten to only need 1 day cleaning work time, also just shortens the downtime of polypropylene production system, from
And improve and the working efficiency that top condenser 20 is cleared up is crossed to reactor, also just improve the production efficiency of polypropylene product.
Reactor crosses top condenser 20 when carrying out condensation work, and cooling water crosses top from water inlet 21 into reactor
In condenser 20, cooling water is crossed in reactor with after thermal material heat exchange in top condenser 20, and cooling water after heating is from water outlet
22 discharge reactors are crossed outside top condenser 20.
Specifically, further include step S21 before carrying out step S3：Top condenser 20 is crossed to reactor and carries out pressure release, is made anti-
The pressure P that device is crossed in the condenser 20 of top is answered to be reduced to predetermined pressure range.Wherein, predetermined pressure generally (is somebody's turn to do in 0.7MPa or so
The normal pressure of polypropylene production system is 2.3MPa, thus the pressure for the compressed nitrogen come in is conveyed by nitrogen delivery pipe road
Also it is 2.3MPa, if changing the normal pressure of polypropylene production system, the pressure for conveying recent compressed nitrogen also should
It is corresponding to change；And predetermined pressure is not more lower better, if too low, will result in reactor and crosses top condenser in purging cleaning
Shi Wendu is too low, may influence service life of equipment.The polypropylene production system that the present invention applies is relative to normal pressure
The best predetermined pressure of 2.3MPa is 0.7MPa, if the normal pressure of polypropylene production system changes, predetermined pressure also may be used
To be set according to corresponding system normal pressure).In this way, by being formed, reactor crosses top separator 30 and reactor crosses top
Pressure difference between condenser 20 crosses the progress of top condenser 20 to realize that nitrogen is crossed from reactor in top separator 30 to reactor
Effective purging, the fouling for then crossing reactor in the tube bank in the condenser 20 of top purge clean.
During carrying out step S1 and step S2, so that reactor is crossed top condenser 20 and cross top separator 30 with reactor
Between connecting line on the first control valve remain off, wherein when carrying out step S21, also by blow-down pipe
5th control valve of road is opened.It is filled with enough nitrogen in this way, being separately implemented at reactor and crossing in the separator 30 of top and incites somebody to action
Reactor crosses the purpose of the pressure reduction in the condenser 20 of top.During carrying out step S3, reactor is made to cross top condenser
20 and reactor cross top separator 30 between connecting line on the first control valve open.Top separator 30 is crossed in reactor
And reactor is crossed between top condenser 20 and is formed after pressure difference, and the first control valve opening can be realized that automatic blowing is clear
Reason simplifies the process of cleaning work.
First on reactor to be crossed to the connecting line that top condenser 20 and reactor are crossed between the separator 30 of top controls
While valve opening, the 5th control valve on blowdown piping is made to keep it turned on, wherein blowdown piping is arranged in whirlwind
Separator 10 and reactor are crossed on the connecting line between the condenser 20 of top, and the blowdown piping of purging is made to be connected.
During carrying out step S1, the company between the condenser 20 of top is crossed by closing cyclone separator 10 and reactor
Take over the third control valve door of road, closing reactor is crossed on the connecting line between top separator 30 and recycle gas compressor 40
The 4th control valve, reactor is crossed into top condenser 20 and reactor is crossed top separator 30 from polypropylene production system and is isolated
Out.When polypropylene production system is shut down, staff closes third control valve door and the 4th control valve, to
Nitrogen is set to cannot be introduced into except reactor crosses top separator 30 and reactor is crossed in the other systems device of top condenser 20, to poly- third
Other devices of alkene production system are protected.
During carrying out step S3, become by being connected to the temperature between blowdown piping and reactor cross top condenser 20
It send device 50 to be monitored nitrogen temperature, step S3 is stopped operation when the temperature of nitrogen is less than zero degrees celsius.Too low temperature
The tube bank that reactor is crossed in the condenser 20 of top can be made to be damaged, in order to protect the intact of tube bank, thus when clearing up purging
Nitrogen temperature is monitored.
Fouling in order to thoroughly be crossed in the condenser 20 of top to reactor as possible carries out purging cleaning, and staff answers
The purging cleaning work that top condenser 20 carries out 4-5 times is crossed to reactor.
Top condenser 20 is crossed to reactor to complete after purging cleaning work, staff closes compressed nitrogen, then will be even
It is connected on the nitrogen delivery pipe road (metal hose) that reactor is crossed on the separator 30 of top to remove, and the connection that metal hose will be connected
Mouthful sealing is blind dead, and the 5th control valve on blowdown piping is closed, at this moment, staff can by third control valve door and
4th control valve is opened, and normal polypropylene product production work is carried out.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
It applies the technical scheme of the present invention, staff crosses top condenser 20 to reactor using compressed nitrogen and purges
Cleaning replaces can shortening by crossing the process cleared up of top condenser 20 to reactor with giant in the prior art pair
It's the cleaning work time of top condenser 20 pasts reactor, can shorten to only need 1 day from original 4-5 days cleaning work time
The cleaning work time, also just shorten the downtime of polypropylene production system, to improve to reactor cross top condensation
The working efficiency that device 20 is cleared up, also just improves the production efficiency of polypropylene product.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of reactor crosses the method for cleaning of top condenser, wherein include using the polypropylene production system of the method for cleaning
Reactor crosses top condenser (20) and reactor crosses top separator (30), and the reactor is crossed top condenser (20) and reacted with described
Device crosses top separator (30) connection, which is characterized in that includes the following steps：
Step S1：Keep the polypropylene production system out of service, and by the reactor cross top condenser (20) with it is described anti-
It answers device to cross top separator (30) from the polypropylene production system to be isolated；
Step S2：When crossing top condenser (20) to the reactor and clearing up, the reactor is crossed into top separator (30)
It is connected to nitrogen delivery pipe road, carries out being pressurized to described poly- third to cross top separator (30) to the reactor using compressed nitrogen
The normal pressure of alkene production system；
Step S3：Top condenser (20) is crossed to the reactor to purge, and by crossing top condenser with the reactor
(20) blowdown piping being connected is vented；
Wherein, further include step S21 between the step S2 and the step S3：
Top condenser (20) is crossed to the reactor and carries out pressure release, the reactor is made to cross the pressure P drops in top condenser (20)
Down to predetermined pressure；
The predetermined pressure is more than or equal to 0.4Mpa, is less than or equal to 0.7MPa.
2. reactor according to claim 1 crosses the method for cleaning of top condenser, which is characterized in that the polypropylene production
System further includes cyclone separator (10) and recycle gas compressor (40), and the cyclone separator (10), the reactor cross top
Condenser (20), the reactor cross top separator (30) and the recycle gas compressor (40) is sequentially connected by connecting line
It is logical,
During carrying out the step S1 and step S2, so that the reactor is crossed top condenser (20) and reacted with described
The first control valve on connecting line that device is crossed between top separator (30) remains off；
During carrying out the step S3 so that first control valve is kept it turned on.
3. reactor according to claim 2 crosses the method for cleaning of top condenser, which is characterized in that
During carrying out the step S3, while so that first control valve is kept it turned on, make described put
Second control valve of blank pipe road is kept it turned on.
4. reactor according to claim 2 crosses the method for cleaning of top condenser, which is characterized in that
During carrying out the step S1, top condenser is crossed with the reactor by closing the cyclone separator (10)
(20) third control valve door and the reactor on the connecting line between cross top separator (30) and the cycle air pressure
The 4th control valve on connecting line between contracting machine (40) makes the reactor cross top condenser (20) and the reactor
Top separator (30) is crossed to isolate from the polypropylene production system.
5. reactor according to claim 1 crosses the method for cleaning of top condenser, which is characterized in that
During carrying out the step S3, top condenser (20) is crossed in the blowdown piping and the reactor by connection
Between temperature transmitter (50) temperature of the compressed nitrogen is monitored, when the temperature of the compressed nitrogen is taken the photograph less than zero
The step S3 is stopped operation when family name spends.
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| CN201510237094.9A CN104848737B (en) | 2015-05-11 | 2015-05-11 | Reactor crosses the method for cleaning of top condenser |
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| CN201510237094.9A CN104848737B (en) | 2015-05-11 | 2015-05-11 | Reactor crosses the method for cleaning of top condenser |
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| CN113694851B (en) * | 2021-09-03 | 2023-02-10 | 江西宝弘纳米科技有限公司 | Method and equipment for preventing explosion and boiling in aluminum isopropoxide synthesis |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54147557A (en) * | 1978-05-12 | 1979-11-17 | Mitsubishi Heavy Ind Ltd | Narrow section cleaning method |
| FR2918167B1 (en) * | 2007-06-27 | 2017-10-20 | Valeo Systemes Thermiques Branche Thermique Moteur | METHOD FOR INTERNAL CLEANING OF A HEAT EXCHANGER |
| CN101775317B (en) * | 2009-12-29 | 2013-06-05 | 聚光科技(杭州)股份有限公司 | Gas treatment method, device and application |
| CN102829671A (en) * | 2012-09-12 | 2012-12-19 | 天津渤化中河化工有限公司 | Cleaning equipment and method for partial condenser in production process of maleic anhydride |
| CN202808647U (en) * | 2012-09-28 | 2013-03-20 | 神华集团有限责任公司 | Crude methanol synthetic system |
| CN203744824U (en) * | 2014-03-14 | 2014-07-30 | 山东齐鲁石化工程有限公司 | On-line cleaning device for reaction gas cooler of acrylonitrile device |
| CN204154123U (en) * | 2014-08-09 | 2015-02-11 | 宁夏宝塔石化科技实业发展有限公司 | A kind of water-cooled purifying system with nitrogen purging device |
| CN204313704U (en) * | 2014-11-17 | 2015-05-06 | 中国石油天然气股份有限公司 | Scale cleaning device for high-pressure water cannon |
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