CN110756534A - Shutdown cleaning method for industrial naphthalene distillation device - Google Patents
Shutdown cleaning method for industrial naphthalene distillation device Download PDFInfo
- Publication number
- CN110756534A CN110756534A CN201910984265.2A CN201910984265A CN110756534A CN 110756534 A CN110756534 A CN 110756534A CN 201910984265 A CN201910984265 A CN 201910984265A CN 110756534 A CN110756534 A CN 110756534A
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- CN
- China
- Prior art keywords
- naphthalene
- industrial naphthalene
- oil
- industrial
- distillation
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
Abstract
The invention discloses a method for shutdown cleaning of an industrial naphthalene distillation device, which comprises the following steps: after the industrial naphthalene distillation device stops working, phenol oil is added into a first reflux groove, the phenol oil is conveyed into a primary distillation tower through a first conveying pump, after the primary distillation tower reaches a certain liquid level, a second conveying pump is started, the primary distillation tower is circularly cleaned, a third conveying pump is started, the phenol oil is conveyed into a rectification tower, after the rectification tower reaches a certain liquid level, a fourth conveying pump is started, the rectification tower is circularly cleaned, after the primary distillation tower is circularly cleaned for a certain time, the cleaned phenol oil is conveyed into a specified storage groove, the phenol oil is recycled, in the initial start-up period of the industrial naphthalene distillation device, the residual phenol oil in the industrial naphthalene distillation device can enter the second reflux groove, the industrial naphthalene quality is unqualified, the unqualified industrial naphthalene is conveyed into a naphthalene oil fractionation groove, and after the industrial naphthalene quality is qualified, the qualified industrial naphthalene is conveyed into the industrial naphthalene storage groove. The invention can reduce the conveying time of cleaning materials, has good cleaning effect and saves the resource cost.
Description
Technical Field
The invention relates to the technical field of equipment maintenance, in particular to a method for shutdown cleaning of an industrial naphthalene distillation device.
Background
In the industry of tar processing, an industrial naphthalene distillation device needs to be stopped and cleaned regularly, mainly materials such as accumulated materials, accumulated residues and coke generated by long-term operation of cleaning equipment are cleaned, the cleaning agent of the conventional industrial naphthalene distillation device is dephenolized phenol oil, the dephenolized phenol oil is a product sold to the outside and can be recycled, but when the industrial naphthalene distillation device is cleaned, the dephenolized phenol oil needs to be matched with a dephenolized phenol oil pump to complete cleaning work, the dephenolized phenol oil pump is small in general equipment selection, the dephenolized phenol oil conveying time is long, the recovered dephenolized phenol oil needs to be reused after repeated processing, and the energy consumption cost and the auxiliary material cost required by processing are increased.
Disclosure of Invention
The invention aims to provide a method for shutdown cleaning of an industrial naphthalene distillation device, which adopts intermediate product phenol oil as shutdown cleaning materials of a working naphthalene distillation device, can reduce the material conveying time, does not need repeated processing of the phenol oil as the intermediate product, saves the energy consumption cost and the auxiliary material cost, and has the cleaning effect equivalent to dephenolized phenol oil.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a method that industrial naphthalene distillation plant stops work and washs, industrial naphthalene distillation plant includes preliminary distillation column, rectifying column, first backward flow groove, second backward flow groove, first delivery pump, second delivery pump, third delivery pump, fourth delivery pump, appointed storage tank, naphthalene oil fraction groove, industrial naphthalene storage tank and heating furnace, industrial naphthalene distillation plant stop work washing method include the following step:
the method comprises the following steps: after the industrial naphthalene distillation device stops working, adding a proper amount of phenol oil into the first reflux tank, conveying the phenol oil into the primary distillation tower through the first conveying pump, starting the second conveying pump after the primary distillation tower reaches a certain liquid level, and circularly cleaning the primary distillation tower;
step two: starting a third delivery pump to deliver the phenol oil into the rectifying tower, and starting a fourth delivery pump to circularly clean the rectifying tower after the rectifying tower reaches a certain liquid level;
step three: after circularly cleaning for a certain time, conveying the cleaned phenol oil to a designated storage tank for recycling;
step four: in the working process of the industrial naphthalene distillation device, residual phenol oil in the industrial naphthalene distillation device can enter the second reflux tank, so that the quality of industrial naphthalene is unqualified, unqualified industrial naphthalene is conveyed to the naphthalene oil fractionation tank, and qualified industrial naphthalene is conveyed to the industrial naphthalene storage tank after the quality of industrial naphthalene is qualified.
Preferably, in the second step, the heating furnace is started to heat the phenol oil to a certain temperature while the fourth delivery pump is started.
The invention has the beneficial effects that: in the cleaning process of the industrial naphthalene distillation device, the phenol oil is conveyed by the conveying pump, the equipment type of the conveying pump is larger than that of the dephenolized phenol oil pump, and the conveying pump is used for conveying the phenol oil required by the cleaning device, so that the material conveying time can be reduced, and the time required by the shutdown of the industrial naphthalene distillation device is further reduced; the phenolic oil is used as an intermediate product, repeated processing is not needed, the energy consumption cost and the auxiliary material cost are saved, and the cleaning effect is equivalent to that of dephenolized phenolic oil; the phenol oil is ensured not to influence the quality of industrial naphthalene products by necessary operation control means; the transformation scheme is simple and practical, the equipment investment is less, the existing device is not influenced, and the popularization is easy.
Drawings
FIG. 1 is an overall schematic diagram of an industrial naphthalene distillation apparatus.
Detailed Description
The technical solution in the embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in fig. 1, a method for shutdown and cleaning of an industrial naphthalene distillation apparatus, the industrial naphthalene distillation apparatus comprises a preliminary distillation tower 1, a rectification tower 2, a first reflux tank 3, a second reflux tank 4, a first delivery pump 5, a second delivery pump 6, a third delivery pump 7, a fourth delivery pump 8, a designated storage tank 9, a naphthalene oil fraction tank 10, an industrial naphthalene storage tank 11 and a heating furnace 12, the method for shutdown and cleaning of the industrial naphthalene distillation apparatus comprises the following steps:
the method comprises the following steps: after the industrial naphthalene distillation device stops working, adding a proper amount of phenol oil into the first reflux tank 3, conveying the phenol oil into the primary distillation tower 1 through the first conveying pump 5, starting the second conveying pump 6 after the primary distillation tower 1 reaches a certain liquid level, and circularly cleaning the primary distillation tower 1;
step two: starting a third delivery pump 7 to deliver the phenol oil into the rectifying tower 2, and starting a fourth delivery pump 8 to circularly clean the rectifying tower 2 after the rectifying tower 2 reaches a certain liquid level;
step three: after the circulation cleaning for a certain time, the cleaned phenol oil is conveyed to a designated storage tank 9 for recycling;
step four: in the working process of the industrial naphthalene distillation device, residual phenol oil in the industrial naphthalene distillation device can enter the second reflux groove 4, so that the quality of industrial naphthalene is unqualified, the unqualified industrial naphthalene is conveyed to the naphthalene oil fractionation groove 10, and the qualified industrial naphthalene is conveyed to the industrial naphthalene storage groove 11 after the quality of the industrial naphthalene is qualified.
In the second step, the heating furnace 12 is started to heat the phenol oil to a certain temperature while the fourth delivery pump 8 is started.
The invention adopts the phenol oil as the shutdown cleaning material of the industrial naphthalene distillation device to replace the prior dephenolized phenol oil, the yield of the dephenolized phenol oil is only 75 to 85 percent relative to the phenol oil, in the aspect of matching equipment, the conveying pump plays a role in conveying the phenol oil, the equipment type of the conveying pump is larger than that of a dephenolized phenol oil pump, and the rated flow of the conveying pump is 3m3H, rated flow of dephenolized phenol oil pump is 1.5m3The conveying pump is used for conveying the shutdown cleaning materials, so that the conveying time can be reduced by 50 percent, and the time required by shutdown of the industrial naphthalene distillation unit is greatly reduced; the phenolic oil is an intermediate product, does not need repeated processing and treatment, can be directly recycled, saves energy consumption cost and auxiliary material cost, has the same cleaning effect as dephenolized phenolic oil, and provides economic benefit; the phenol oil is ensured not to influence the quality of industrial naphthalene products by necessary operation control means; the transformation scheme is simple and practical, the equipment investment is less, the existing device is not influenced, and the popularization is easy.
Claims (2)
1. The utility model provides a method of industry naphthalene distillation plant cleaning of stopping work, industry naphthalene distillation plant includes that preliminary distillation tower (1), rectifying column (2), first backwash groove (3), second backwash groove (4), first delivery pump (5), second delivery pump (6), third delivery pump (7), fourth delivery pump (8), appointed storage tank (9), naphthalene oil fraction groove (10), industry naphthalene storage tank (11) and heating furnace (12), characterized by that the method of industry naphthalene distillation plant cleaning of stopping work include following step:
the method comprises the following steps: after the industrial naphthalene distillation device stops working, adding a proper amount of phenol oil into the first reflux tank (3), conveying the phenol oil into the primary distillation tower (1) through the first conveying pump (5), starting the second conveying pump (6) after the primary distillation tower (1) reaches a certain liquid level, and circularly cleaning the primary distillation tower (1);
step two: starting a third delivery pump (7), delivering the phenol oil into the rectifying tower (2), starting a fourth delivery pump (8) after the rectifying tower (2) reaches a certain liquid level, and circularly cleaning the rectifying tower (2);
step three: after the phenolic oil is circularly cleaned for a certain time, the cleaned phenolic oil is conveyed to a designated storage tank (9) and recycled;
step four: in the working process of the industrial naphthalene distillation device, residual phenol oil in the industrial naphthalene distillation device enters the second reflux groove (4) to cause unqualified industrial naphthalene quality, unqualified industrial naphthalene is conveyed to the naphthalene oil fractionation groove (10), and qualified industrial naphthalene is conveyed to the industrial naphthalene storage tank (11) after the industrial naphthalene quality is qualified.
2. The method for shutdown cleaning of industrial naphthalene distillation plant according to claim 1, characterized in that in said second step, the heating furnace (12) is started to heat the phenol oil to a certain temperature at the same time as the fourth transfer pump (8) is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984265.2A CN110756534A (en) | 2019-10-16 | 2019-10-16 | Shutdown cleaning method for industrial naphthalene distillation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910984265.2A CN110756534A (en) | 2019-10-16 | 2019-10-16 | Shutdown cleaning method for industrial naphthalene distillation device |
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| Publication Number | Publication Date |
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| CN110756534A true CN110756534A (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910984265.2A Pending CN110756534A (en) | 2019-10-16 | 2019-10-16 | Shutdown cleaning method for industrial naphthalene distillation device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138347A (en) * | 1993-11-22 | 1996-12-18 | 珀诺德里卡德公司 | Process for washing refillable plastic bottles |
| EP1565277A1 (en) * | 2002-06-10 | 2005-08-24 | Marcello Ferrara | Cleaning method |
| CN102686310A (en) * | 2009-12-22 | 2012-09-19 | 埃克森美孚化学专利公司 | Separation vessels for use in polymerization processes and methods for cleaning same |
| CN103965962A (en) * | 2014-05-19 | 2014-08-06 | 大连理工大学 | Method for preparing benzylamine and clean fuel from dephenolized phenol oil |
-
2019
- 2019-10-16 CN CN201910984265.2A patent/CN110756534A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138347A (en) * | 1993-11-22 | 1996-12-18 | 珀诺德里卡德公司 | Process for washing refillable plastic bottles |
| EP1565277A1 (en) * | 2002-06-10 | 2005-08-24 | Marcello Ferrara | Cleaning method |
| CN102686310A (en) * | 2009-12-22 | 2012-09-19 | 埃克森美孚化学专利公司 | Separation vessels for use in polymerization processes and methods for cleaning same |
| CN103965962A (en) * | 2014-05-19 | 2014-08-06 | 大连理工大学 | Method for preparing benzylamine and clean fuel from dephenolized phenol oil |
Non-Patent Citations (2)
| Title |
|---|
| 冯水清: "《用碱洗法清洗分馏塔介绍》", 《深冷技术》 * |
| 颜长青: "《酚油清洗粗苯换热器技术的研究》", 《燃料与化工》 * |
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Application publication date: 20200207 |
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