CN110591736A - Online replacement method for dry quenching primary dust removal water-cooling sleeve by adopting auxiliary device - Google Patents
Online replacement method for dry quenching primary dust removal water-cooling sleeve by adopting auxiliary device Download PDFInfo
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- CN110591736A CN110591736A CN201910928421.3A CN201910928421A CN110591736A CN 110591736 A CN110591736 A CN 110591736A CN 201910928421 A CN201910928421 A CN 201910928421A CN 110591736 A CN110591736 A CN 110591736A
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- water
- cooling sleeve
- auxiliary device
- cooling
- sleeve
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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
Abstract
The invention discloses an online replacement method of a dry quenching primary dedusting water-cooling sleeve by adopting an auxiliary device, belonging to the technical field of coking cooling. Which comprises the following steps: after the preparation work is finished, the ash in the old water-cooling sleeve is discharged before the old water-cooling sleeve is replaced; hanging a gourd, fixing the old water-cooling sleeve, and then removing all water inlet and outlet pipelines; then starting a gate valve of the auxiliary device, and cutting off the primary dust remover from the water-cooling sleeve; removing the old water-cooling sleeve and hoisting away from the site; hoisting a new water-cooling sleeve in place to the position of the walking platform; filling the new water-cooling sleeve with ash; closing a gate valve of the auxiliary device; and fixing the new water-cooling sleeve after the sleeve is in place, and installing a water inlet pipe and a water outlet pipe. The online replacement method of the water-cooling sleeve ensures safe, reliable, convenient and quick replacement operation, eliminates potential safety hazards of the replacement operation, shortens the operation time, improves the operation efficiency and saves the cost.
Description
Technical Field
The invention relates to the technical field of coking cooling, in particular to an online replacement method of a coke dry quenching primary dedusting water-cooling sleeve by adopting an auxiliary device.
Background
Dry quenching is a development trend of the coking industry in China. In the coke dry quenching production process of the coking industry, the temperature (higher than 900 ℃) of the coke powder subjected to primary dust removal is very high, and the coke powder cannot be directly discharged and recycled, a cooling device is required to be used for cooling (to be cooled to below 300 ℃) the existing cooling device of the coke dry quenching primary dust remover is characterized in that a three-layer cylindrical water-cooling sleeve is arranged at the bottom of the primary dust remover, circulating cooling water is introduced into an inner cylinder and an outer cylinder, the coke powder passes through a cavity between the inner cylinder and a middle cylinder, and heat exchange is carried out between the coke powder and the circulating cooling water in the inner cylinder and the outer cylinder in the moving process of the coke powder, so that the purposes of cooling the.
Due to long-term contact with high temperature, the upper part of the water-cooling sleeve is continuously influenced by high-temperature coke powder scouring and uneven cooling, so that the water-cooling sleeve is easy to damage, circulating water enters red coke powder, an ash discharge valve is blocked, and ash cannot be normally discharged. Because the primary dust remover is a negative pressure area, after water vapor enters the circulating system, H in circulating gas in the system is caused2The content is increased, the negative pressure at the boiler inlet can be increased by the coke powder accumulated in the primary dust removal, and a large amount of coke powder carried by the circulating gas can abrade the boiler tube, thereby causing great harm to the safe and stable operation of the dry quenching system. And because the coke powder temperature is high, the coke dry quenching equipment needs to be stopped, and the water cooling sleeve can be overhauled and replaced after the coke powder is cooled, so that the operation of the coke dry quenching production system is seriously influenced.
Disclosure of Invention
The invention aims to provide an online replacement method of a coke dry quenching primary dedusting water-cooling sleeve by adopting an auxiliary device, so as to solve the problem that the conventional coke dry quenching primary dedusting water-cooling sleeve is difficult to replace online.
The utility model provides a dry coke quenching primary dust removal water-cooling sleeve online replacement method adopting auxiliary device, auxiliary device passes through the ring flange and is connected with a dust remover and water-cooling sleeve respectively, and auxiliary device includes: the pipe diameter of the steel pipe is consistent with that of the inner pipe of the water-cooling sleeve; the method comprises the following steps:
(1) after the preparation work is finished, the ash in the old water-cooling sleeve is discharged before the old water-cooling sleeve is replaced;
(2) hanging a gourd, fixing the old water-cooling sleeve, and then removing all water inlet and outlet pipelines;
(3) then starting a gate valve of the auxiliary device, and cutting off the primary dust remover from the water-cooling sleeve;
(4) removing the old water-cooling sleeve and hoisting away from the site;
(5) hoisting a new water-cooling sleeve in place to the position of the walking platform;
(6) filling the new water-cooling sleeve with ash;
(7) closing a gate valve of the auxiliary device;
(8) and fixing the new water-cooling sleeve after the sleeve is in place, and installing a water inlet pipe and a water outlet pipe.
Further, in the preferred embodiment of the present invention, in the step (6), the new water-cooled jacket is filled with cold dry coke powder before installation.
Further, in a preferred embodiment of the present invention, the preparation in step (1) includes the following steps:
(a) adjusting a furnace discharge plan, and discharging the furnace 2 hours ahead of the day and night shift;
(b) pouring the top of the new water-cooling sleeve liner one week in advance;
(c) the main control room suspends coke discharging, controls the circulating air quantity, reduces the coke powder particle content in the circulating gas, and the inspector manually operates in advance on site to discharge coke powder in the primary dust remover;
(d) connecting fire water of the primary dust removal ash bucket layer in advance;
(e) keeping the high material level in the dry quenching furnace;
(f) the operation box and the operation cable at the lower part of the old water-cooling sleeve are wrapped by asbestos cloth in advance, so that the operation box and the operation cable are prevented from being burnt out by red ash sprayed out when the water-cooling sleeve is detached.
Further, in a preferred embodiment of the present invention, the casting material used in the step (b) is AS-027.
Further, in a preferred embodiment of the present invention, the amount of the circulating air in the step (c) is controlled to be 8 to 10 ten thousand.
The invention has the following beneficial effects:
the online replacement method of the water-cooling sleeve ensures safe, reliable, convenient and quick replacement operation, eliminates potential safety hazards of the replacement operation, shortens the operation time, improves the operation efficiency and saves the cost.
The auxiliary device is connected between the ash bucket of the primary dust remover and the water-cooling sleeve, only the water-cooling sleeve and the auxiliary device need to be dismounted during dismounting, the blind plate is replaced by the gate valve, extra mounting and dismounting are not needed, the replacing time is shortened, the potential safety hazard which can appear in mounting or dismounting the blind plate is avoided, and the safety of the replacing personnel is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an auxiliary device of the present invention.
In the figure: 1-a steel pipe; 2-a gate valve; 3-flange plate 4-primary dust remover; 5-water cooling sleeve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1, the method for replacing a dry quenching primary dedusting water-cooling sleeve on line by using an auxiliary device of the invention comprises the following steps:
(1) after the preparation work is finished, the ash in the old water-cooling sleeve is discharged before the old water-cooling sleeve is replaced, so that the high-temperature ash is prevented from hurting people in the hoisting process;
wherein the preparation work comprises the following steps:
(a) adjusting a furnace discharge plan, and discharging the furnace 2 hours ahead of the day and night shift; and operation arrangement is reserved for replacing the water-cooling sleeve.
(b) Pouring the top of the new water-cooling sleeve liner one week in advance; wherein, the casting material adopted by the casting is AS-027. And the AS castable is poured for the new water-cooling sleeve, so that the high-temperature resistance and corrosion resistance of the water-cooling sleeve are improved, and the service life of the water-cooling sleeve is prolonged.
(c) The main control room stops discharging coke, controls the circulating air volume by 8-10 ten thousand, reduces the coke powder particle content in the circulating gas, and the inspector manually operates in advance on site to discharge the coke powder in the primary dust remover. The circulating air quantity is controlled to be 8-10 ten thousand, the content of coke powder particles in the circulating gas is reduced, and the whole replacement process is ensured to be in a safe working environment.
(d) The fire water on the primary dust removal hopper layer is connected in advance, and when the situation occurs, the red dust sprayed out of the flange connection part can be timely extinguished, and the preparation work is well done.
(e) Keep putting out high material level in the stove futilely, can stop the coke charging operation when starting auxiliary device, because the coke charging can make the room pressure fluctuation of prestoring, lead to boiler population pressure fluctuation, have the possibility that circulating gas reveals from the blind plate, keep putting out high material level in the stove futilely and can carry out the coke of a small amount of row in order to guarantee boiler evaporation capacity.
(f) The operation box and the operation cable at the lower part of the old water-cooling sleeve are wrapped by asbestos cloth in advance, so that the operation box and the operation cable are prevented from being burnt out by red ash sprayed out when the water-cooling sleeve is detached.
(2) Hanging a gourd, fixing the old water-cooling sleeve, and then removing all water inlet and outlet pipelines;
(3) then starting a gate valve of the auxiliary device, and cutting off the primary dust remover from the water-cooling sleeve; auxiliary device passes through ring flange 3 and is connected with dust remover 4 and water-cooling sleeve 5 once respectively, and auxiliary device includes: the water-cooled water pipe comprises a steel pipe 1 and a gate valve 2 arranged on the steel pipe 1, wherein the pipe diameter of the steel pipe 1 is consistent with that of an inner pipe of a water-cooled sleeve 5. The auxiliary device is connected between the ash bucket of the primary dust remover and the water-cooling sleeve, only the water-cooling sleeve and the auxiliary device need to be dismounted during dismounting, the blind plate is replaced by the gate valve without additional mounting and dismounting, the replacing time is shortened, the potential safety hazard which can appear in the mountable or dismountable blind plate is avoided, and the safety of the replacing personnel is ensured.
(4) Removing the old water-cooling sleeve and hoisting away from the site;
(5) hoisting a new water-cooling sleeve in place to the position of the walking platform;
(6) filling the new water-cooling sleeve with ash; wherein the new water cooled jacket is filled with cold dry coke powder prior to installation. The device can prevent red coke powder from overflowing to scald replacement personnel when the gate valve is closed, and meanwhile, the red coke powder is prevented from entering the water-cooling sleeve, and the water-cooling sleeve cracks again due to overhigh local temperature.
(7) Closing a gate valve of the auxiliary device;
(8) and fixing the new water-cooling sleeve after the sleeve is in place, and installing a water inlet pipe and a water outlet pipe.
After replacement, process control is optimized: the suction force at the inlet of the boiler is reduced to below 1.35 from 1.55kpa, so that the generation of floating coke is avoided; 1DC deposited dust can be removed in time, so that a large amount of dust is prevented from washing a secondary superheating pipeline of the boiler, and the risk of pipe explosion is avoided; 1DC dust removal ash particle further reduces, no longer has the particulate matter of coke-butyl form, has ensured the result of use of 2# coal charging dust removal spraying in advance.
After the coke oven is replaced, the circulating air quantity can be improved, the coke discharging temperature is reduced by 10 ℃, the coking time of the coke oven can be stabilized at 30h, and 7500 ℃ of power generation is performed more every day. The method avoids the annual repair of blowing out, calculates the power generation benefit of 40 ten thousand according to the minor repair for 4 days, calculates the water quenching discount of 49.3 ten thousand, and creates the economic benefit of 89.3 ten thousand yuan in an accumulated way.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The method for replacing the dry quenching primary dedusting water-cooling sleeve on line by adopting the auxiliary device is characterized in that the auxiliary device is respectively connected with a primary deduster and the water-cooling sleeve through a flange plate, and the auxiliary device comprises the following steps: the water-cooling sleeve comprises a steel pipe and a gate valve arranged on the steel pipe, wherein the pipe diameter of the steel pipe is consistent with that of an inner pipe of the water-cooling sleeve, and the water-cooling sleeve comprises the following steps:
(1) after the preparation work is finished, the ash in the water-cooling sleeve is discharged before the old water-cooling sleeve is replaced;
(2) hanging a gourd, fixing the old water-cooling sleeve, and then removing all water inlet and outlet pipelines;
(3) then starting a gate valve of the auxiliary device, and cutting off the primary dust remover from the water-cooling sleeve;
(4) removing the old water-cooling sleeve and hoisting away from the site;
(5) hoisting a new water-cooling sleeve in place to the position of the walking platform;
(6) filling the new water-cooling sleeve with ash;
(7) closing a gate valve of the auxiliary device;
(8) and fixing the new water-cooling sleeve after the sleeve is in place, and installing a water inlet pipe and a water outlet pipe.
2. The method for replacing a dry quenching primary dedusting water-cooling sleeve with an auxiliary device as claimed in claim 1, wherein in the step (6), the new water-cooling sleeve is filled with cold dry coke powder before being installed.
3. The method for replacing a dry quenching primary dedusting water-cooling sleeve pipe by adopting an auxiliary device as claimed in claim 1, wherein the preparation work in the step (1) comprises the following steps:
(a) adjusting a furnace discharge plan, and discharging the furnace 2 hours ahead of the day and night shift;
(b) pouring the top of the new water-cooling sleeve liner one week in advance;
(c) the main control room suspends coke discharging, controls the circulating air quantity, reduces the coke powder particle content in the circulating gas, and the inspector manually operates in advance on site to discharge coke powder in the primary dust remover;
(d) connecting fire water of the primary dust removal ash bucket layer in advance;
(e) keeping the high material level in the dry quenching furnace;
(f) the operation box and the operation cable at the lower part of the old water-cooling sleeve are wrapped by asbestos cloth in advance, so that the operation box and the operation cable are prevented from being burnt out by red ash sprayed out when the water-cooling sleeve is detached.
4. The method for replacing the dry quenching primary dedusting water-cooling sleeve pipe with the auxiliary device in the claim 3, wherein the pouring material adopted in the pouring in the step (b) is AS-027.
5. The method for replacing a dry quenching primary dedusting water-cooling sleeve pipe by an auxiliary device as claimed in claim 3, wherein the circulating air quantity in the step (c) is controlled to be 8-10 ten thousand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910928421.3A CN110591736A (en) | 2019-09-28 | 2019-09-28 | Online replacement method for dry quenching primary dust removal water-cooling sleeve by adopting auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910928421.3A CN110591736A (en) | 2019-09-28 | 2019-09-28 | Online replacement method for dry quenching primary dust removal water-cooling sleeve by adopting auxiliary device |
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| Publication Number | Publication Date |
|---|---|
| CN110591736A true CN110591736A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910928421.3A Pending CN110591736A (en) | 2019-09-28 | 2019-09-28 | Online replacement method for dry quenching primary dust removal water-cooling sleeve by adopting auxiliary device |
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| CN (1) | CN110591736A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253957A (en) * | 2020-02-28 | 2020-06-09 | 鞍钢股份有限公司 | Method for discharging ash at high material level by dry quenching primary dust removal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542802A (en) * | 2016-03-04 | 2016-05-04 | 济钢集团国际工程技术有限公司 | Primary-dedusting water cooling sleeve for dry quenching |
-
2019
- 2019-09-28 CN CN201910928421.3A patent/CN110591736A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105542802A (en) * | 2016-03-04 | 2016-05-04 | 济钢集团国际工程技术有限公司 | Primary-dedusting water cooling sleeve for dry quenching |
Non-Patent Citations (1)
| Title |
|---|
| 王晓峻: "干熄焦水冷套管更换方案的优化及应用", 《燃料与化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253957A (en) * | 2020-02-28 | 2020-06-09 | 鞍钢股份有限公司 | Method for discharging ash at high material level by dry quenching primary dust removal |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20191220 |