CN103962351A - Method for sweeping chemical raw material conveying pipelines - Google Patents

Method for sweeping chemical raw material conveying pipelines Download PDF

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Publication number
CN103962351A
CN103962351A CN201410161654.2A CN201410161654A CN103962351A CN 103962351 A CN103962351 A CN 103962351A CN 201410161654 A CN201410161654 A CN 201410161654A CN 103962351 A CN103962351 A CN 103962351A
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CN
China
Prior art keywords
nitrogen
sweeping
pipeline
steam
raw
Prior art date
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Granted
Application number
CN201410161654.2A
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Chinese (zh)
Other versions
CN103962351B (en
Inventor
赵华
王晓林
李志�
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Angang Steel Co Ltd
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Angang Steel Co Ltd
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Filing date
Publication date
Application filed by Angang Steel Co Ltd filed Critical Angang Steel Co Ltd
Priority to CN201410161654.2A priority Critical patent/CN103962351B/en
Publication of CN103962351A publication Critical patent/CN103962351A/en
Application granted granted Critical
Publication of CN103962351B publication Critical patent/CN103962351B/en
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Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/02Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027Cleaning the internal surfaces; Removal of blockages
    • B08B9/032Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing

Abstract

A method for sweeping chemical raw material conveying pipelines comprises the steps that two parallel-connected nitrogen heaters are used for heating nitrogen through steam, one nitrogen heater is connected with nitrogen, the other nitrogen heater is connected with steam, and the temperature of the nitrogen is 80-90 DEG C; 10 minutes before chemical raw materials are conveyed, the hot nitrogen is connected to front portions of raw material pump heads respectively in two paths, the hot nitrogen in one path is used for sweeping the pipeline from the front portion of pumps to all raw material storage grooves, and the hot nitrogen in the other path is used for sweeping the pipeline from input pumps to all process terminals; within 10 minutes after the chemical raw materials are conveyed, the above steps are executed repeatedly. Compared with the prior art, the method has the advantages that the sweeping time of all auxiliary raw material pipelines is short, sweeping efficiency is high, the pipeline sweeping mode through the nitrogen heaters is practical in actual production, the sweeping effect can meet the technological design requirement, possibility of blocking and freezing of the pipelines is reduced, and labor intensity of operators is lowered.

Description

A kind of cleaning method of industrial chemicals conveyance conduit
Technical field
The present invention relates to coking chemical, petrochemical technology field, relate in particular to a kind of cleaning method of industrial chemicals conveyance conduit.
Background technology
The various production auxiliary materials of the each operation in gas purification operation area (washing oil as required in crude benzol operation, sulphur ammonium saturator and the required sulfuric acid of relieving haperacidity acid absorption column, the required NaOH of desulfurization process, the required NaOH of potassium hydroxide and ammonia still process) can constantly consume aborning, frequently need to supplement, need to be transported to respectively from oil depot region three operations, feed-line reaches more than 1500 meter, be interrupted and carry, when winter, easily block up and freeze, conventionally adopt steam conveying pipe segmentation to clean, clear and coherently need to spend a large amount of manpowers and steam resource, when serious, restrict normal production run.
Summary of the invention
The object of the present invention is to provide a kind of cleaning method of industrial chemicals conveyance conduit, adopt hot nitrogen for cleaning medium, avoid raw material dilution or rotten, reduce air content in pipeline, can not burn, explosion accident, after cleaning, also do not have steam remnants, reduction feed line road is stifled freezes possibility, so that it is residual effectively to remove pipeline material simultaneously.
For achieving the above object, the present invention realizes by the following technical solutions:
A cleaning method for industrial chemicals conveyance conduit, utilizes the nitrogen after heating, before conveying, is passed in pipeline and goes, and concrete operation step is as follows:
1) heat to nitrogen with steam by two nitrogen heaters in parallel, a-road-through nitrogen, a-road-through steam in nitrogen heater, cold nitrogen is heated to 80 DEG C~90 DEG C by steam;
2) in first 10 minutes of conveying industrial chemicals, first divide two-way to access respectively before each raw material pump head with hot nitrogen, one tunnel with hot nitrogen to pump before to pipeline cleaning between each raw material storage tank, another road nitrogen to carry each operation terminal pipeline to clean simultaneously, has prevented the reversion of pump in cleaning process to front pump simultaneously;
3) clean complete having carried after industrial chemicals in 10 minutes, then repeating step 2) feed line line and affiliated facility thereof are cleaned one time again.
Compared with prior art, the invention has the beneficial effects as follows:
1) cleaning each auxiliary material pipeline only needs more than 20 minute, and sweeping efficiency is high, and nitrogen heater pipe-line purging pattern is feasible in actual production, sweeps effect and can reach production engineering specifications;
2) adopt the method minimizing pipeline to block up and freeze possibility, reduced operator's labour intensity.
Detailed description of the invention
Below the specific embodiment of the present invention is further illustrated:
A cleaning method for industrial chemicals conveyance conduit, utilizes the nitrogen after heating, before conveying, is passed in pipeline and goes, and concrete operation step is as follows:
1) heat to nitrogen with steam by two nitrogen heaters in parallel, a-road-through nitrogen, a-road-through steam in nitrogen heater, cold nitrogen is heated to 80 DEG C~90 DEG C by steam;
2) in first 10 minutes of conveying industrial chemicals, first divide two-way to access respectively before each raw material pump head with hot nitrogen, one tunnel with hot nitrogen to pump before to pipeline cleaning between each raw material storage tank, another road nitrogen to carry each operation terminal pipeline to clean simultaneously, has prevented the reversion of pump in cleaning process to front pump simultaneously;
3) clean complete having carried after industrial chemicals in 10 minutes, then repeating step 2) feed line line and affiliated facility thereof are cleaned one time again.
When cleaning feed line line and affiliated facility thereof: first use before hot nitrogen scavenging pump to pipeline between each raw material storage tank (or product storage tank), then scavenging pump is to carrying each operation terminal pipeline, cleaning process will prevent that pump from reversing.
Before industrial chemicals is carried and after carrying: carry first 10 minutes tissue cleaning once pipelines of industrial chemicals, carry in latter 10 minutes and organized again and clear up once pipeline, before carrying by industrial chemicals, can reduce raw material remnants in conveyance conduit with rear twice cleaning of conveying, twice cleaning accumulated time is that about 20 minutes, sweeping efficiency is high.
Select safe and effective cleaning medium, ensure pipe-line purging quality
1) adopt hot nitrogen for cleaning medium, because of nitrogen not can with transferring raw material generation physical-chemical reaction, avoid raw material dilution or rotten, also can reduce air content in pipeline, can not burn, explosion accident, after cleaning, do not have steam remnants simultaneously yet, reduce the stifled possibility of freezing in feed line road.
2) adopt steam that cold nitrogen is heated to 80 DEG C~90 DEG C, so that it is residual effectively to remove pipeline material.

Claims (1)

1. a cleaning method for industrial chemicals conveyance conduit, utilizes the nitrogen after heating, before conveying, is passed in pipeline and goes, and it is characterized in that, concrete operation step is as follows:
1) heat to nitrogen with steam by two nitrogen heaters in parallel, a-road-through nitrogen, a-road-through steam in nitrogen heater, cold nitrogen is heated to 80 DEG C~90 DEG C by steam;
2) in first 10 minutes of conveying industrial chemicals, first divide two-way to access respectively before each raw material pump head with hot nitrogen, one tunnel with hot nitrogen to pump before to pipeline cleaning between each raw material storage tank, another road nitrogen to carry each operation terminal pipeline to clean simultaneously, has prevented the reversion of pump in cleaning process to front pump simultaneously;
3) clean complete having carried after industrial chemicals in 10 minutes, then repeating step 2) feed line line and affiliated facility thereof are cleaned one time again.
CN201410161654.2A 2014-04-21 2014-04-21 Method for sweeping chemical raw material conveying pipelines Active CN103962351B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410161654.2A CN103962351B (en) 2014-04-21 2014-04-21 Method for sweeping chemical raw material conveying pipelines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410161654.2A CN103962351B (en) 2014-04-21 2014-04-21 Method for sweeping chemical raw material conveying pipelines

Publications (2)

Publication Number Publication Date
CN103962351A true CN103962351A (en) 2014-08-06
CN103962351B CN103962351B (en) 2017-04-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410161654.2A Active CN103962351B (en) 2014-04-21 2014-04-21 Method for sweeping chemical raw material conveying pipelines

Country Status (1)

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CN (1) CN103962351B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101327488A (en) * 2008-08-01 2008-12-24 天津二十冶建设有限公司 Method for cleaning hydraulic tubing
CN201375973Y (en) * 2009-02-20 2010-01-06 中冶实久建设有限公司南京分公司 Nitrogen purging device for hydraulic pipeline
CN202667197U (en) * 2012-06-14 2013-01-16 鞍钢股份有限公司 Cleaning recovery device for pulverized coal filter
CN202951684U (en) * 2012-11-28 2013-05-29 中冶焦耐工程技术有限公司 Pipeline cleaning device of high temperature coke oven waste gas injected by compressed nitrogen gas
KR20130102878A (en) * 2012-03-08 2013-09-23 전북에너지서비스주식회사 Device for cleaning in gas pipe
CN103372557A (en) * 2012-04-23 2013-10-30 至砾机电设备(上海)有限公司 Blowing and purifying method and device thereof
CN203426109U (en) * 2013-06-28 2014-02-12 安徽广信农化股份有限公司 Feed pipe cleaning device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101327488A (en) * 2008-08-01 2008-12-24 天津二十冶建设有限公司 Method for cleaning hydraulic tubing
CN201375973Y (en) * 2009-02-20 2010-01-06 中冶实久建设有限公司南京分公司 Nitrogen purging device for hydraulic pipeline
KR20130102878A (en) * 2012-03-08 2013-09-23 전북에너지서비스주식회사 Device for cleaning in gas pipe
CN103372557A (en) * 2012-04-23 2013-10-30 至砾机电设备(上海)有限公司 Blowing and purifying method and device thereof
CN202667197U (en) * 2012-06-14 2013-01-16 鞍钢股份有限公司 Cleaning recovery device for pulverized coal filter
CN202951684U (en) * 2012-11-28 2013-05-29 中冶焦耐工程技术有限公司 Pipeline cleaning device of high temperature coke oven waste gas injected by compressed nitrogen gas
CN203426109U (en) * 2013-06-28 2014-02-12 安徽广信农化股份有限公司 Feed pipe cleaning device

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