CN101255387A - Reboiler cleaning agent and cleaning method thereof - Google Patents
Reboiler cleaning agent and cleaning method thereof Download PDFInfo
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- CN101255387A CN101255387A CNA2008100236470A CN200810023647A CN101255387A CN 101255387 A CN101255387 A CN 101255387A CN A2008100236470 A CNA2008100236470 A CN A2008100236470A CN 200810023647 A CN200810023647 A CN 200810023647A CN 101255387 A CN101255387 A CN 101255387A
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- reboiler
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Abstract
A detergent for reboiler and cleaning method thereof are disclosed, which pertains to the detergent field. The detergent comprises raw materials with weight proportion as follows: alpha-methylnaphthanlene 5-10 parts; beta-methylnaphthanlene 50-70 parts; naphthalin 2-15 parts; heavy aromatic hydrocarbon solvent 10-35 parts. Advantages are that organic scale formation formed in the reboiler because of decomposition of heat conductive oil due to long-term heating or condensation is effectively removed; contaminant release process is simple; detergent after contaminant release can be recycled and reused, which is economic and environmental protective.
Description
Technical field
The invention belongs to the clean-out system technical field, be specifically related to a kind of reboiler cleaning agent.
Background technology
Along with the develop rapidly of science and technology, industries such as oil, chemical industry, medicine, dyestuff to processes such as corresponding product synthesize, prepares, makes with extra care in, required various complex apparatus are more and more many, for example, large heat exchanger, condenser, reboiler etc.In the tube side and shell side of these equipment, especially dirt and the organic fouling in the shell side manually cleans very difficult.As not disposing these foulings, can influence heat transfer efficiency and energy consumption is increased, severe patient also can influence ordinary production.This cleans with regard to needing special-purpose clean-out system.
In the prior art, adopt solvent, complex solvent to clean to the cleaning of condenser, interchanger; To the cleaning of homogeneous solution-type reactor, the mode of using chemical reagent and incrustation scale to decompose reaches the cleaning purpose; Usually use dissolution with solvents to clean to pyrolyzer, furnace tubing; To chemical pipeline usually with potato spirit or mix the phenols double solvents as clean-out system; Cleaning to skin, glass curtain wall is made clean-out system with washing composition or hydrophilic surfactant active usually.
Reboiler is a Chemical Manufacture heating installation commonly used, is seen in rectifier bottoms morely, more mentioning is also arranged, as CN101012164A in patent documentation.Usually, reboiler all be with thermal oil as thermal barrier or claim heat-conducting medium, use after for some time the reboiler shell side why can coking be since the macromolecular cpd that contains in the thermal oil composition can oxygenolysis when being heated or polycondensation generate the organic fouling of similar gelationus.For example: the thermal oil series product trade mark that area, Chinese Jiangsu is produced is YD-131, YD-132, YD-133, its main component are heavy aromatics fractions such as naphthalene, naphthane, methylnaphthalene, dimethyl diphenyl, ditan, diformazan fluorenes, indane, dimethylphenanthrene, three methylphenanthrenes.Wherein the chemical property of some component is just very unstable, and following reaction takes place in for example naphthalene just oxidation easily at high temperature:
And the also oxidation easily of luxuriant and rich with fragrance compounds generates phenanthrenequione, biphenyl dicarboxylic acid or Tetra hydro Phthalic anhydride according to different oxidizing conditions.
Although the substances content of these unstable chemcial properties is few, these materials much all are isomers.With the methylnaphthalene is example, and alpha-methyl-naphthalene and beta-methylnaphthalene are arranged, though this isomers molecular weight is identical and boiling point differs less than 2 ℃, chemical property is far from each other, causes the generation of complex chemical reaction.Just because of above-mentioned reason, after being the reboiler life-time service of heating medium with the thermal oil, scale formation will take place at reboiler shell side pipe partition, and the long-time decomposes of thermal oil or organic fouling that polycondensation produced have stronger intractable, again because the constructional feature of reboiler self, make dirt once generation, cleaning scale removal work is very difficult, utilizes solvent in the prior art, complex solvent, scale remover etc. almost can't play a role.
Cleaning for reboiler, present matting or the high pressure water of adopting cleans morely, the former is because there are certain gap in the equipment volume and the actual useful volume that calculate, and the dosage that causes cleaning agent easily can not practical requirement and do not reach the cleaning performance of expection; The latter adopts high pressure water to clean, because it is higher to clean hydraulic pressure, make tubulation damage (puncture) easily, and the undesirable cleaning frequency that causes of cleaning performance is higher, has had a strong impact on carrying out smoothly of safe and stable arrangement and long period production.And at present, the snaking problem that industry is always reboiler perplexs, and is also exploring and is repaying examination energetically simultaneously, but the ideal clean-out system is not arranged so far.
Summary of the invention
Task of the present invention is to be to provide a kind of reboiler cleaning agent that can tackle effectively and remove by the long-time decomposes of thermal oil or organic fouling that polycondensation generated.
Task of the present invention also is to provide a kind of purging method of reboiler cleaning agent, this method features high scale-removing effect, also has economy, a feature of environmental protection simultaneously.
Task of the present invention is finished like this, a kind of reboiler cleaning agent, and its raw material by following weight part ratio is formed: alpha-methyl-naphthalene 5-10 part; Beta-methylnaphthalene 50-70 part; Naphthalene 2-15 part; Heavy aromatic hydrocarbon solvent 10-35 part.
In a specific embodiment of the present invention, described heavy aromatic hydrocarbon solvent is meant the close-cut fraction that is produced by in the C+10 heavy aromatic hydrocarbon comprehensive process process.
In another specific embodiment of the present invention, described comprehensive process is meant that by C+10 heavy aromatic hydrocarbon feedstock production aromatic solvent described close-cut fraction is meant in preparation aromatic solvent process by the fraction of the smart distilled boiling range of rectifying tower at 195-270 ℃.
An also task of the present invention is finished like this, and a kind of purging method of reboiler cleaning agent at first, is put the thermal oil in the reboiler and removed; Then, to send into reboiler than the reboiler cleaning agent that is mixed with for alpha-methyl-naphthalene 5-10 part, beta-methylnaphthalene 50-70 part, naphthalene 2-15 part and heavy aromatic hydrocarbon solvent 10-35 part by weight with circulating conveyor, and reboiler cleaning agent is flowed at the enclosed system internal recycle of reboiler, clean-out system storage tank and pipeline composition, the clean-out system to the reboiler of flowing through heats simultaneously; At last, reboiler cleaning agent put from reboiler remove, finish cleaning, wherein, the reboiler cleaning agent of emitting is collected and is utilized.
In another specific embodiment of the present invention, described circulating conveyor is an in-line pump.
In another specific embodiment of the present invention, described reboiler cleaning agent is 8-18h in the reboiler internal recycle mobile time.
More of the present invention and in specific embodiment, the described flow that circulates is 25-35m3/h.
In of the present invention and then specific embodiment, described heating is meant steam heating, and the Heating temperature of described heating is 70-100 ℃.
Of the present invention again more and in specific embodiment, described collection utilizes the reboiler cleaning agent that is meant emitting from reboiler to purify again, described purification is meant used clean-out system mixed carries out rectifying separation in the C+10 heavy aromatic hydrocarbon raw material, obtain the heavy arene fraction.
In again of the present invention and then specific embodiment, described collection utilizes and is meant the reboiler cleaning agent of emitting from reboiler as fuel.
Reboiler cleaning agent provided by the invention can remove effectively by the long-time decomposes of thermal oil or polycondensation and produce concentrate organic fouling in reboiler; The scale removal process is simple and not numerous; Clean-out system after the scale removal is recycled, can be embodied the economy and the feature of environmental protection.
Description of drawings
Accompanying drawing is a specific embodiment synoptic diagram that utilizes the inventive method that reboiler is cleaned.
Embodiment
Embodiment 1
At first, thermal oil in the reboiler 9 is all put only, close thermal oil again and enter reboiler pipeline valve 7 and reboiler thermal oil outlet conduit valve 2, open clean-out system simultaneously and enter reboiler pipeline valve 6 and enter clean-out system storage tank inlet duct valve 3 with clean-out system; In clean-out system storage tank 4, contain by following by weight than raw material: 5 parts of alpha-methyl-naphthalenes, 52 parts of beta-methylnaphthalenes, 15 parts of naphthalenes and join the reboiler cleaning agent of getting for 28 parts at 190-270 ℃ heavy aromatic hydrocarbon solvent from the boiling range that provides by the grand environmental protection auxiliary agent in Wujiang, Wujiang City, Jiangsu Province, Jiangsu Province, China company limited of market acquisition, then, start the in-line pump 5 of carrying reboiler cleaning agent, dominant discharge is 30m
3/ h, reboiler cleaning agent is introduced reboiler 9 through reboiler inlet duct 8, return clean-out system storage tank 4 through reboiler outlet conduit 1 again, circulation repeatedly, after reboiler 9 is full of, feed heating steam via reboiler tube side inlet duct 11, steam is drawn by reboiler outlet conduit 10 by tube side, control vapor pressure≤0.3MPa keeps reboiler cleaning agent Fouling Cleaning in 93 ℃ of following circulation 10h can be with reboiler clean; At last, reboiler cleaning agents in the reboiler 9 are put remove, the reboiler cleaning agent of emitting is delivered to purification, composite after purifying, again be used as reboiler cleaning agent after composite, concrete purification is meant used clean-out system mixed carries out rectifying separation in the C+10 heavy aromatic hydrocarbon raw material, utilize again after obtaining corresponding fraction, composite be meant each is formed according to required ratio compatibility be in harmonious proportion.
Only the alpha-methyl-naphthalene of choosing being changed into 8 parts, beta-methylnaphthalene changes 58 parts, naphthalene into and changes 2 parts, heavy aromatic hydrocarbon solvent into and change 32 parts into, and use the boiling range that provides by No. 38 Liyang City, East Road, Pingling, Liyang City, Jiangsu Province, China sincere Xinghua worker company limited instead at 200-245 ℃ heavy aromatic hydrocarbon solvent, the clean-out system circular flow changes 35m into
3/ h, the temperature of clean-out system wash cycles changes 100 ℃ into, and the time of wash cycles changes 8.5h into.All the other are with embodiment 1.
Embodiment 3
Only the alpha-methyl-naphthalene of choosing is changed into 10 parts, beta-methylnaphthalene and change 65 parts, naphthalene into and change 6 parts, heavy aromatic hydrocarbon solvent into and change 19 parts into, the clean-out system circular flow changes 25m into
3/ h, the temperature of clean-out system wash cycles changes 85 ℃ into, and the time of wash cycles changes 15h into, and after cleaning finished, the reboiler cleaning agent that contains organic dirt of emitting from reboiler 9 was as fuel, and all the other are with embodiment 1.
Embodiment 4
Only alpha-methyl-naphthalene in the clean-out system of choosing is changed into 9 parts, beta-methylnaphthalene and change 70 parts, naphthalene into and change 8 parts, heavy aromatic hydrocarbon solvent into and change 13 parts into, the clean-out system circular flow changes 32m into
3/ h, the temperature of clean-out system wash cycles changes 78 ℃ into, and the time of wash cycles changes 17h into.All the other are with embodiment 1.
Only change the alpha-methyl-naphthalene content of choosing into 7 parts, beta-methylnaphthalene changes 60 parts, naphthalene into and changes 10 parts, heavy aromatic hydrocarbon solvent into and change 23 parts into, and the clean-out system circular flow changes 28m into
3/ h, the temperature of clean-out system wash cycles changes 70 ℃ into, and the time of wash cycles changes 18h into, and after cleaning finished, the reboiler cleaning agent that contains organic dirt of emitting from reboiler 9 was as fuel, and all the other are with embodiment 1.
The foregoing description 1-5 removes the dirt in the reboiler 9, and after the driving, the operation conditions of reboiler is good, and the heat exchange effect of reboiler obviously improves, and the aperture of thermal oil variable valve obviously reduces, and cleaning performance is good.
Claims (10)
1, a kind of reboiler cleaning agent is characterized in that its raw material by following weight part ratio forms:
Alpha-methyl-naphthalene 5-10 part; Beta-methylnaphthalene 50-70 part; Naphthalene 2-15 part; Heavy aromatic hydrocarbon solvent 10-35 part.
2, reboiler cleaning agent according to claim 1 is characterized in that described heavy aromatic hydrocarbon solvent is meant the close-cut fraction that is produced by in the C+10 heavy aromatic hydrocarbon comprehensive process process.
3, reboiler cleaning agent according to claim 2, it is characterized in that described comprehensive process is meant by C+10 heavy aromatic hydrocarbon feedstock production aromatic solvent, described close-cut fraction is meant in preparation aromatic solvent process by the fraction of the smart distilled boiling range of rectifying tower at 195-270 ℃.
4, a kind of purging method of reboiler cleaning agent as claimed in claim 1 is characterized in that at first, the thermal oil in the reboiler is put removed; Then, to send into reboiler than the reboiler cleaning agent that is mixed with for alpha-methyl-naphthalene 5-10 part, beta-methylnaphthalene 50-70 part, naphthalene 2-15 part and heavy aromatic hydrocarbon solvent 10-35 part by weight with circulating conveyor, and reboiler cleaning agent is flowed at the enclosed system internal recycle of reboiler, clean-out system storage tank and pipeline composition, the clean-out system to the reboiler of flowing through heats simultaneously; At last, reboiler cleaning agent put from reboiler remove, finish cleaning, wherein, the reboiler cleaning agent of emitting is collected and is utilized.
5, the purging method of reboiler cleaning agent according to claim 4 is characterized in that described circulating conveyor is an in-line pump.
6, the purging method of reboiler cleaning agent according to claim 4 is characterized in that described reboiler cleaning agent is 8-18h in the reboiler internal recycle mobile time.
7, the purging method of reboiler cleaning agent according to claim 6 is characterized in that the described flow that circulates is 25-35m
3/ h.
8, the purging method of reboiler cleaning agent according to claim 4 is characterized in that described heating is meant steam heating, and the Heating temperature of described heating is 70-100 ℃.
9, the purging method of reboiler cleaning agent according to claim 4, it is characterized in that described collection utilizes the reboiler cleaning agent that is meant emitting to purify again from reboiler, described purification is meant used clean-out system mixed carries out rectifying separation in the C+10 heavy aromatic hydrocarbon raw material, obtain the heavy arene fraction.
10, the purging method of reboiler cleaning agent according to claim 4 is characterized in that described collection utilizes the reboiler cleaning agent that is meant emitting to be used as fuel again from reboiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100236470A CN100552012C (en) | 2008-04-14 | 2008-04-14 | Reboiler cleaning agent and purging method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100236470A CN100552012C (en) | 2008-04-14 | 2008-04-14 | Reboiler cleaning agent and purging method thereof |
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| CN101255387A true CN101255387A (en) | 2008-09-03 |
| CN100552012C CN100552012C (en) | 2009-10-21 |
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| CNB2008100236470A Active CN100552012C (en) | 2008-04-14 | 2008-04-14 | Reboiler cleaning agent and purging method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553273A (en) * | 2011-12-14 | 2012-07-11 | 攀钢集团有限公司 | Method and device for controlling steam temperature in reboiler |
| CN106824936A (en) * | 2017-01-03 | 2017-06-13 | 北京首钢朗泽新能源科技有限公司 | A kind of Distallation systm on-line cleaning device and method |
| CN111545530A (en) * | 2020-05-14 | 2020-08-18 | 北京乐文科技发展有限公司 | Oil refining device shutdown oil removal cleaning method |
| CN111544907A (en) * | 2020-05-27 | 2020-08-18 | 来剑锋 | Energy-saving reboiler for chemical gas separation |
| CN111854511A (en) * | 2020-06-28 | 2020-10-30 | 恒力石化（大连）炼化有限公司 | Method for cleaning unconverted oil heat exchanger of fluidized bed residual oil hydrocracking device |
-
2008
- 2008-04-14 CN CNB2008100236470A patent/CN100552012C/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102553273A (en) * | 2011-12-14 | 2012-07-11 | 攀钢集团有限公司 | Method and device for controlling steam temperature in reboiler |
| CN106824936A (en) * | 2017-01-03 | 2017-06-13 | 北京首钢朗泽新能源科技有限公司 | A kind of Distallation systm on-line cleaning device and method |
| CN106824936B (en) * | 2017-01-03 | 2020-05-08 | 北京首钢朗泽新能源科技有限公司 | Online cleaning device and method for distillation system |
| CN111545530A (en) * | 2020-05-14 | 2020-08-18 | 北京乐文科技发展有限公司 | Oil refining device shutdown oil removal cleaning method |
| CN111544907A (en) * | 2020-05-27 | 2020-08-18 | 来剑锋 | Energy-saving reboiler for chemical gas separation |
| CN111854511A (en) * | 2020-06-28 | 2020-10-30 | 恒力石化（大连）炼化有限公司 | Method for cleaning unconverted oil heat exchanger of fluidized bed residual oil hydrocracking device |
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| Publication number | Publication date |
|---|---|
| CN100552012C (en) | 2009-10-21 |
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Owner name: CHANGSHU ALLIANCE CHEMICAL CO., LTD. Free format text: FORMER NAME: CHANGSHU LIANBANG CHEMICAL INDUSTRY CO., LTD. |
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Address after: 215338 Ho Ho Town, Jiangsu, Changshou City Patentee after: Changshu Alliance Chemical Co., Ltd. Address before: 215538 Ho Ho Town, Jiangsu, Changshou City Patentee before: Changshu Lianbang Chemical Industry Co., Ltd. |
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Effective date of registration: 20200603 Address after: 215500 No.13, Caotang Road, Changshu, Suzhou, Jiangsu Province Patentee after: Changshu intellectual property operation center Co.,Ltd. Address before: 215338 Ho Ho Town, Jiangsu, Changshou City Patentee before: CHANGSHU ALLIANCE CHEMICAL Co.,Ltd. |
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