CN112029515A - Online repairing method for water-cooling sleeve - Google Patents
Online repairing method for water-cooling sleeve Download PDFInfo
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- CN112029515A CN112029515A CN202010703358.6A CN202010703358A CN112029515A CN 112029515 A CN112029515 A CN 112029515A CN 202010703358 A CN202010703358 A CN 202010703358A CN 112029515 A CN112029515 A CN 112029515A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/02—Dry cooling outside the oven
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Abstract
The invention discloses an online repairing method of a water-cooling sleeve, which comprises the following steps: s1, closing the water inlet of the cooling water system of the outer sleeve of the water-cooling sleeve, draining or emptying the water in the cooling water system of the outer sleeve and normally supplying water to the cooling water system of the inner sleeve for cooling, and preliminarily observing and judging the approximate leakage position of the cooling water of the outer sleeve of the water-cooling sleeve by naked eyes; s2, opening the approximate part obtained by observation corresponding to the outside of the water-cooled sleeve, and searching and determining the specific position of the internal leakage point; and S3, performing welding repair welding treatment on the string leakage points, testing leakage of the jacket cooling water after the welding repair welding treatment, and performing repair welding recovery treatment on the opening after determining that no problem exists. The invention thoroughly solves the problem that the leakage of the cooling water system outside the dry quenching water-cooling sleeve is repaired on line under the condition of non-stop production, and ensures the normal operation of the dry quenching water-cooling sleeve, thereby ensuring the safe, efficient and stable production of the dry quenching device.
Description
Technical Field
The invention relates to the field of coke dry quenching in the coking industry, in particular to an on-line repairing method for a water-cooling sleeve.
Background
At present, five sets of dry quenching devices are shared by steel-covered strand coal coking industrial and sub-companies, 2 sets of dry quenching devices are arranged in a new area, the processing capacity is 200t/h, and each set of dry quenching device is provided with 2 water-cooling sleeves for 4; the old area is provided with 3 sets of dry quenching devices, the processing capacity is 125t/h, and each set of dry quenching device is provided with 12 water cooling sleeves. The structure of the water-cooling sleeve is schematically shown in figure 1.
Since dry quenching in new and old areas is put into production successively, the service cycle of a water-cooling sleeve is basically about 6 months, the phenomenon of cooling water leakage can occur in the continuous production operation for 6 months generally, most of the leakage occurs in an outer sleeve cooling water system, cooling water enters a dust discharge system of the water-cooling sleeve after leakage, and then enters a dry quenching circulating gas system, hydrogen is decomposed from the cooling water in a high-temperature environment, the hydrogen of the system exceeds the standard, the explosion risk exists, the normal production of the dry quenching is seriously influenced, and the dry quenching needs to be stopped, maintained and replaced.
The water-cooling sleeve with the cross leakage is counted, most of the cross leakage is generated in the outer sleeve cooling water system and generally is formed by welding or breaking a welding seam interface, and the analysis reason is mainly that the welding seam between the outer water-cooling sleeve water system and the ash discharge system is affected by coke powder scouring and rapid cooling and rapid heating temperature for a long time, so that the welding seam is formed or broken, and the cross leakage of the outer sleeve cooling water system of the water-cooling sleeve is caused. Once leakage occurs, production must be stopped for replacement and maintenance, and because the replacement and maintenance time is long each time, the time for general maintenance and process temperature rise and fall is 3 days, the influence on the adjustment ratio of the dry quenching normal production and the blast furnace in the subsequent process is huge, and the indirect economic loss is huge.
If the leakage of the water-cooling sleeve can be repaired on line under the condition of not stopping production, the dry quenching process can be used for efficiently, safely and stably producing, has great extension benefit on the stable production of the blast furnace, and simultaneously has zero emission on the pollution of waste gas and waste water in the aspect of environmental protection and great social benefit.
Disclosure of Invention
The invention aims to provide a method for online repairing the leakage of a cooling water system of a water cooling jacket outer sleeve in a dry quenching non-stop state.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for repairing a water-cooling sleeve on line comprises the following steps:
s1, closing the water inlet of the cooling water system of the outer sleeve of the water-cooling sleeve, draining or emptying the water in the cooling water system of the outer sleeve and normally supplying water to the cooling water system of the inner sleeve for cooling, and preliminarily observing and judging the approximate leakage position of the cooling water of the outer sleeve of the water-cooling sleeve by naked eyes;
s2, opening the approximate part obtained by observation corresponding to the outside of the water-cooled sleeve, and searching and determining the specific position of the internal leakage point;
and S3, performing welding repair welding treatment on the string leakage points, testing leakage of the jacket cooling water after the welding repair welding treatment, and performing repair welding recovery treatment on the opening after determining that no problem exists.
Further, a specific method for preliminarily and visually observing and judging the approximate leakage position of the cooling water of the outer sleeve of the water-cooling jacket comprises the following steps: through depending on which direction of water-cooling sleeve pipe from which side down drip or the infiltration, can tentatively judge that the upper portion welding department that this direction corresponds has the leakage.
Furthermore, the shell at the corresponding position of the leakage is cut, a specific leakage point is searched, the leakage point is processed after the leakage point is found, and then the damaged shell is recovered.
Furthermore, the welding positions comprise flange interfaces, welding seams of the middle cylinder body (the sleeve is rolled into a cylinder by a plate and then welded on), welding openings of the water inlet pipe and the water outlet pipe of the outer cylinder and the like.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention thoroughly solves the problem that the leakage of the cooling water system outside the dry quenching water-cooling sleeve is repaired on line under the condition of non-stop production, and ensures the normal operation of the dry quenching water-cooling sleeve, thereby ensuring the safe, efficient and stable production of the dry quenching device.
The method is safe and reliable, scientifically saves the overhaul time, prolongs the effective operation time of the coke dry quenching device, greatly improves the coke dry quenching yield, provides ideas for online overhaul of the leakage of the coke dry quenching water-cooling sleeve, and lays valuable practical experience.
The method for online repairing the water cooling sleeve once for each set of dry quenching coke can save about 200 ten thousand yuan by calculating, and in addition, the method for online repairing the dry quenching water cooling sleeve has great popularization and application values and inevitably brings considerable economic benefits for the development of the dry quenching coke.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of a conventional water-cooled casing;
description of reference numerals: 1. pouring a material; 2. an upper flange; 3. an inner cylinder water inlet pipe; 4. an inner cylinder water outlet pipe; 5. an outer cylinder; 6. a middle cylinder; 7. an inner barrel; 8. a dust discharging funnel; 9. a gate valve; 10. an outer barrel water inlet pipe; 11. and a water outlet pipe of the outer barrel.
Detailed Description
As shown in figure 1, the water-cooling sleeve on-line repairing method comprises the steps of firstly closing water inlet of a cooling water system of an outer sleeve of a water-cooling sleeve, emptying water in the cooling water system of the outer sleeve, preliminarily judging the approximate leakage position of the cooling water of the outer sleeve of the water-cooling sleeve, opening the corresponding position outside the water-cooling sleeve, searching and determining the specific position of an internal string leakage point, then performing welding repair welding treatment on the string leakage point, testing leakage of the upper water of the cooling water of the outer sleeve after treatment, and performing repair welding recovery treatment on the outer wall of the water-cooling sleeve after no problem is determined.
After the leakage of the cooling water system outside the water-cooling sleeve occurs, the traditional method for replacing and repairing the water-cooling sleeve by cooling down the coke dry quenching system to a certain temperature by cooling down the coke dry quenching system to reduce the production to a certain temperature is changed. The traditional method has long maintenance time, complex replacement operation and large consumption of spare parts of the water-cooling sleeve. Not only influences the coke yield and the generated energy of dry quenching coke, but also needs to install a new water-cooling sleeve pipe when the leaked water-cooling sleeve pipe is replaced to be waste. The method carries out online repair treatment on the leakage point of the cooling water system of the outer sleeve of the water cooling sleeve under the normal production condition of dry quenching, achieves one-time success, and realizes online repair operation of the leakage of the cooling water system of the outer sleeve of the water cooling sleeve. The normal operation of the dry quenching water-cooling sleeve is ensured, thereby ensuring the safe, efficient and stable production of the dry quenching device.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (4)
1. The method for repairing the water-cooling sleeve on line is characterized by comprising the following steps:
s1, closing the water inlet of the cooling water system of the outer sleeve of the water-cooling sleeve, draining or emptying the water in the cooling water system of the outer sleeve and normally supplying water to the cooling water system of the inner sleeve for cooling, and preliminarily observing and judging the approximate leakage position of the cooling water of the outer sleeve of the water-cooling sleeve by naked eyes;
s2, opening the approximate part obtained by observation corresponding to the outside of the water-cooled sleeve, and searching and determining the specific position of the internal leakage point;
and S3, performing welding repair welding treatment on the string leakage points, testing leakage of the jacket cooling water after the welding repair welding treatment, and performing repair welding recovery treatment on the opening after determining that no problem exists.
2. The method for repairing the water-cooling sleeve on line according to claim 1, wherein the specific method for judging the approximate leakage position of the cooling water of the water-cooling sleeve by preliminary visual observation comprises the following steps: through depending on which direction of water-cooling sleeve pipe from which side down drip or the infiltration, can tentatively judge that the upper portion welding department that this direction corresponds has the leakage.
3. The method for repairing the water-cooling sleeve on line according to claim 2, wherein the shell at the position corresponding to the leakage is cut, a specific leakage point is searched, the leakage point is processed after the specific leakage point is found, and then the damaged shell is recovered.
4. The method for repairing the water-cooling sleeve on line as recited in claim 3, wherein the welding position comprises a flange interface, a welding seam of the middle cylinder body and a welding interface of a water inlet pipe and a water outlet pipe of the outer cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010703358.6A CN112029515B (en) | 2020-07-21 | 2020-07-21 | Online repairing method for water-cooling sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010703358.6A CN112029515B (en) | 2020-07-21 | 2020-07-21 | Online repairing method for water-cooling sleeve |
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| CN112029515A true CN112029515A (en) | 2020-12-04 |
| CN112029515B CN112029515B (en) | 2022-04-08 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2228201A1 (en) * | 1997-02-07 | 1998-08-07 | Hugh H. Sprague | Non-recovery coke oven gas combustion system |
| CN201694993U (en) * | 2010-05-19 | 2011-01-05 | 武汉钢铁(集团)公司 | Telescoping water-cooling cooler |
| CN202813894U (en) * | 2012-05-04 | 2013-03-20 | 王英慧 | Detachable plate heat exchanger for heat exchange of sewage cold and hot source fluid and refrigerating fluid |
| CN204111662U (en) * | 2014-09-17 | 2015-01-21 | 西安华江环保科技股份有限公司 | A kind of disposable dust remover coke powder cooling apparatus |
| CN207025288U (en) * | 2016-12-14 | 2018-02-23 | 山东迅达化工集团有限公司 | It is a kind of can leakage detection leak stopping vertical water cooling double tube reactor |
| CN210004815U (en) * | 2018-10-18 | 2020-01-31 | 上海电气电站环保工程有限公司 | tube heat exchanger convenient for maintenance |
-
2020
- 2020-07-21 CN CN202010703358.6A patent/CN112029515B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2228201A1 (en) * | 1997-02-07 | 1998-08-07 | Hugh H. Sprague | Non-recovery coke oven gas combustion system |
| CN201694993U (en) * | 2010-05-19 | 2011-01-05 | 武汉钢铁(集团)公司 | Telescoping water-cooling cooler |
| CN202813894U (en) * | 2012-05-04 | 2013-03-20 | 王英慧 | Detachable plate heat exchanger for heat exchange of sewage cold and hot source fluid and refrigerating fluid |
| CN204111662U (en) * | 2014-09-17 | 2015-01-21 | 西安华江环保科技股份有限公司 | A kind of disposable dust remover coke powder cooling apparatus |
| CN207025288U (en) * | 2016-12-14 | 2018-02-23 | 山东迅达化工集团有限公司 | It is a kind of can leakage detection leak stopping vertical water cooling double tube reactor |
| CN210004815U (en) * | 2018-10-18 | 2020-01-31 | 上海电气电站环保工程有限公司 | tube heat exchanger convenient for maintenance |
Non-Patent Citations (1)
| Title |
|---|
| 吴延锐等: "大型干熄焦水冷套管的应用研究", 《工艺与设备》 * |
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| CN112029515B (en) | 2022-04-08 |
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