CN107446595B - Method for integrally replacing coke oven ascending pipe during full-scale process - Google Patents
Method for integrally replacing coke oven ascending pipe during full-scale process Download PDFInfo
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- CN107446595B CN107446595B CN201610378883.9A CN201610378883A CN107446595B CN 107446595 B CN107446595 B CN 107446595B CN 201610378883 A CN201610378883 A CN 201610378883A CN 107446595 B CN107446595 B CN 107446595B
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- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
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Abstract
A method for integrally replacing a coke oven riser pipe in a full furnace comprises the following steps: closing the ascending pipe coal gas turning plate, opening an ascending pipe cover and a coal charging hole furnace cover, placing a small chimney on an opened coal charging port, extending two compressed air pipes into a fire drop hole, pressing flame originally emerging from the ascending pipe in a carbonization chamber back to the carbonization chamber and then out of the small chimney, closing the ascending pipe cover, lifting a vertical pipe of the ascending pipe, pulling out the compressed air pipes in the fire drop hole, placing a fire retardant cover into a base hole of the ascending pipe of the carbonization chamber, then replacing the base, taking out the fire retardant cover, and dismantling the old ascending pipe; and fixing a new ascending pipe, hoisting the bridge pipe in place, and installing the water seal water pipe and the ascending pipe connecting rod in place. According to the invention, the coke oven can realize the replacement of the riser pipe when the coke oven is full without pushing the coke, thereby avoiding the damage of the oven wall brick of the carbonization chamber caused by pushing the coke oven and replacing the riser pipe and the leakage caused by the damage, and avoiding the air pressure sealing and ceramic welding repair of the oven wall of the carbonization chamber.
Description
Technical Field
The invention relates to the field of metallurgical coking, in particular to a full-furnace integral replacement method of a coke oven ascending pipe. The method can realize the replacement of the ascending pipe when the coke oven is full under the condition of not pushing coke, avoid the damage of wall bricks of the coking chamber and the leakage caused by the damage of the wall bricks of the coking chamber due to pushing the coke and replacing the ascending pipe with empty coke, prevent the damage of the coke oven body caused by replacing the ascending pipe with empty coke, simultaneously avoid the air pressure sealing and ceramic welding repair of the wall of the coking chamber, and ensure that the coke oven can realize the discharge operation according to the operation plan.
Background
In the coking production process, coal charging and coke pushing operations are required, and during the process, pulverized coal is subjected to dry distillation to generate raw coke oven gas, wherein the raw coke oven gas is generated as follows:
raw gas in a carbonization chamber → an ascending pipe → a bridge pipe → low-pressure ammonia water cooling → a gas turning plate → a gas collecting pipe → subsequent chemical processes (purification and recovery).
In the metallurgical coking process, the ascending pipe of the coke oven has the function of guiding the crude gas generated in the coking chamber into the bridge pipe and the gas collecting pipe, and meanwhile, the ascending pipe vertical pipe is provided with a fire drop hole, and the fire drop hole of the fire drop hole can allow an operator to judge the fire drop condition of coke cakes in the coking chamber. Generally, because the temperature of raw coke oven gas circulating in the riser pipe changes periodically, graphite adheres to the inner wall of the riser pipe, manual cleaning is needed at regular time, and after the riser pipe is used for a certain period, refractory bricks built on the inner wall of the riser pipe crack and fall off, so that the riser pipe leaks.
After the ascending pipe is used for a period of time, the phenomena of peeling and falling off of refractory bricks on the inner wall of the ascending pipe can occur, so that the outer wall of the ascending pipe can be burnt through, and the phenomena of smoking and ignition can be caused. In order to avoid the phenomena of smoking and fire, the ascending pipe with the inner wall stripped and fallen off by the refractory bricks is replaced.
In order to maintain riser tightness, the riser must be replaced in its entirety. Thereby ensuring the safety, environmental protection and smooth operation of the coke oven operation.
However, each time the ascending tube is replaced, it is necessary to push out the red coke in the carbonization chamber, close the gas flap, and then replace the ascending tube, that is, to replace the ascending tube with an empty furnace. However, since the empty furnace replacement of the riser pipe causes great damage to the wall of the coking chamber, causing graphite burning of the wall of the coking chamber and furnace wall blowby, it is necessary to perform the air pressure sealing and ceramic repair work after the replacement every time the empty furnace replacement of the riser pipe is performed.
In addition, when the ascending pipe is replaced without a furnace, and the time between the ascending pipe replacement without a furnace and the time of the planned discharging of the original discharging furnace exceeds 2 hours after the replacement and the charging, the discharging operation of the coke oven K1 is deteriorated, and the coke yield of one furnace is influenced when each ascending pipe is replaced.
In order to maintain the tightness of the riser, ensure the safety, environmental protection and smooth operation of the coke oven operation and ensure the K1 coefficient, a method for replacing the whole full-oven riser of the coke oven by replacing the riser of the riser is required.
Disclosure of Invention
In order to solve the problems, the invention provides a method for replacing a coke oven riser pipe of a full-oven whole coke oven, according to the method, after judging that the coke cake is mature through the fire drop of the coke cake in a coking chamber of the coke oven, a series of measures are taken, particularly the implementation of a riser pipe fire suppression technology, and the replacement of the riser pipe is started before the coke in the coking chamber is not pushed out, so that the full-oven replacement of the riser pipe is realized, thereby preventing the burning loss of the oven wall of the coking chamber and realizing the planned stable and smooth production operation of the coke oven, and realizing safe and clean production.
By implementing the method, the coke oven can realize the replacement of the ascending pipe when the coke oven is full under the condition of not pushing the coke, avoid the damage of the oven wall bricks of the carbonization chamber and the leakage caused by the damage of the oven wall bricks of the carbonization chamber due to the replacement of the ascending pipe after pushing the coke and the empty oven, prevent the oven body of the coke oven from being damaged due to the replacement of the ascending pipe when the empty oven is empty, simultaneously, the air pressure sealing and the ceramic welding repair are not needed to be carried out on the oven wall of the carbonization chamber, ensure the coke oven to realize the oven discharging operation according to the operation plan, not influence the normal oven discharging sequence, ensure the K1 coefficient and realize the safe and clean production.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for integrally replacing a coke oven riser pipe when the coke oven is full is used for integrally replacing the coke oven riser pipe under the condition that red coke exists in a carbonization chamber, and comprises the steps of dismantling an old riser pipe and integrally installing a new riser pipe, and is characterized by comprising the following steps of:
the coal gas turning plate of the old ascending pipe is closed, the old ascending pipe cover and the coal charging hole furnace cover are opened,
placing a small chimney on the opened coal charging hole, opening the fire drop hole of the old ascending pipe, extending the compressed air pipe into the fire drop hole, pressing the flame in the carbonization chamber back to the carbonization chamber and stringing out from the small chimney on the opened coal charging port,
closing the old ascending pipe cover, lifting the old ascending pipe vertical pipe, pulling out the compressed air pipe in the fire drop hole, putting the fire retardant cover into the base hole of the ascending pipe of the carbonization chamber, replacing the base, and removing the old ascending pipe;
then integrally hoisting and fixing the new ascending pipe,
high-pressure ammonia water and low-pressure ammonia water are connected into a new ascending pipe,
installing a new water seal pipe of the ascending pipe and pulling a connecting rod for the new ascending pipe.
The method for replacing the whole coke oven riser pipe in full is characterized in that,
before closing the coal gas turning plate of the old ascending pipe, the water seal pipe of the water seal seat of the old ascending pipe and the small platforms for two-side operation are dismantled.
The method for replacing the whole coke oven riser pipe in full is characterized in that,
after the fire drop hole of the old ascending pipe is opened, two compressed air pipes are stretched into the fire drop hole for alternately using pressed air, so that the flame originally emerging from the ascending pipe in the carbonization chamber is pressed back to the carbonization chamber and is strung out from a small chimney on the opened coal feeding port.
The method for replacing the whole coke oven riser pipe in full is characterized in that,
when the old riser cover is closed and the riser vertical pipe is lifted, the compressed air pipe in the fire drop hole is pulled out when the distance between the old riser cover and the riser vertical pipe is 10-20cm away from the old riser base.
At this time, the flame originally emerging from the ascending pipe in the carbonization chamber is pressed back to the carbonization chamber and is discharged from the small chimney on the opened coal feeding port, and the pressed air is not needed.
The method for replacing the whole coke oven riser pipe in full is characterized in that,
after the base is replaced and the base is installed in place, the fire retardant cover is taken out, and the old ascending pipe is dismantled.
The method for replacing the whole coke oven riser pipe in full is characterized in that,
after the integral hoisting and the fixing of the new ascending pipe, a ceramic fiber rope is driven into the bridge pipe bell and spigot, and the bridge pipe bell and spigot is sealed.
The method for replacing the whole coke oven riser pipe in full is characterized in that,
when high-pressure ammonia water and low-pressure ammonia water are connected into a new ascending pipe, the high-pressure ammonia water and the low-pressure ammonia water are connected onto corresponding flange connectors, and are fastened by bolts, and then a new ascending pipe water seal water pipe and a new ascending pipe connecting rod are installed.
By implementing the method, the coke oven can realize the replacement of the ascending pipe when the coke oven is full under the condition of not pushing coke, avoids the damage of oven wall bricks of the carbonization chamber and the leakage caused by the damage of the oven wall bricks of the carbonization chamber due to the replacement of the ascending pipe after pushing coke and replacing empty oven, simultaneously does not need to carry out air pressure sealing and ceramic welding repair on the oven wall of the carbonization chamber, does not influence the normal discharging sequence, and has good effect on the normal production operation of the coke oven.
Drawings
Fig. 1 is a schematic view of a riser.
Fig. 2 is a left side view of the small chimney.
Fig. 3 is a top view of a small chimney.
FIG. 4 is a schematic view of a riser fire hole.
FIG. 5 is a front view of a firestop cover.
FIG. 6 is a top view of the firestop cover.
In the figure, 1-bridge pipe bell and spigot, 2-bridge pipe, 3-high pressure ammonia nozzle flange, 4-low pressure ammonia nozzle flange, 5-ascending pipe cover, 6-ascending pipe upper pipe joint, 7-ascending pipe middle pipe joint, 8-ascending pipe lower pipe joint, 9-ascending pipe fire drop hole and 10-ascending pipe base.
Detailed Description
Example 1
(1) Preparatory work before replacement
(1.1) material preparation: each flange is matched with a ceramic fiber pad, an electric striking wrench, a towing disc, bolts, nuts, gaskets, oxygen, acetylene gas, electric welding, a small chimney, various wrenches, a crowbar, a hammer and a U-shaped clamp. Riser bases and corresponding articles.
(1.2) assembling the new ascending pipe one day before construction, and fastening bolts at each flange in place by using striking wrenches.
And (1.3) according to the coke cake fire falling condition of the coking chamber with the changed furnace number, starting to fire after the coke cake fire of the coking chamber.
(1.4) because the temperature near the ascending pipe is as high as more than 80 ℃, in order to facilitate the operation of constructors, the fire-proof heat insulation measure is carried out on the adjacent ascending pipe by using ceramic fiber cotton.
And (1.5) selecting a corresponding crane according to the actual hoisting radius, hoisting height and hoisting weight on site, and performing series construction.
(2) Main replacement method
And (2.1) before replacement, removing the old ascending pipe, selecting a corresponding tonnage truck crane according to the overall weight, height and installation height of the ascending pipe, and arranging the crane frame on the coke pusher lane.
And (2.2) the hot repair personnel firstly remove the sealing ring in the socket of the bridge pipe.
And (2.3) removing the water seal water pipe of the water seal seat of the ascending pipe and the small platforms at the two sides.
And (2.4) closing the gas turning plate of the ascending pipe and binding the gas turning plate by using an iron wire, and opening a cover of the ascending pipe and a cover of a coal charging hole which is separated by 2 coal charging holes.
And (2.5) closing the low-pressure ammonia water valve, and removing the flange connection of the high-pressure ammonia water and the low-pressure ammonia water.
(2.6) placing a small chimney (the base is 80mm high and the diameter is 40mm) on the opened coal feeding port, opening the fire falling hole of the ascending pipe, extending two compressed air pipes into the fire falling hole, and pressing the flame originally emerging from the ascending pipe in the carbonization chamber back to the carbonization chamber to be stringed out from the small chimney on the opened coal feeding port.
And (2.7) removing the ascending pipe support.
And (2.8) removing the connecting bolt between the bridge pipe and the ascending pipe.
(2.9) removing the riser drawbar
And (2.10) cutting off the connecting bolt between the lower pipe joint of the ascending pipe and the base of the ascending pipe.
(2.11) binding and hanging the bridge pipe by using a steel wire rope and placing the bridge pipe on a coke pushing lane
And (2.12) closing the ascending pipe cover, binding the ascending pipe vertical pipe by using a steel wire rope, and starting slow hoisting. And pulling out the compressed air pipe in the fire drop hole when the distance is 10-20cm away from the base of the ascending pipe.
And (2.13) lifting the ascending pipe on the coke pushing lane.
(2.14) the heat repair personnel put the fire-retardant cover into the base hole of the ascending pipe of the carbonization chamber and then replace the base.
And (2.15) after the base is installed in place by the hot repair personnel, taking out the fire retardant cover, and integrally hoisting the new ascending pipe in place.
And (2.16) after the ascending pipe is hoisted in place, re-installing the four support frames and fixing the ascending pipe.
And (2.17) after the ascending pipe is fixed, hoisting the bridge pipe in place, connecting the bridge pipe with the ascending pipe three-way flange through bolts, and fastening the bridge pipe through an electric wrench.
And (2.18) driving ceramic fiber ropes with corresponding specifications into the bridge pipe socket, and sealing the socket.
(2.19) connecting high-pressure ammonia water and low-pressure ammonia water to corresponding flanges and fastening the flanges by bolts. The riser water seal pipe is installed in place.
(2.20) the riser link is installed in place.
(2.21) checking high-pressure ammonia water, low-pressure ammonia water and the like, and switching to a normal discharging operation sequence after the normal operation is confirmed.
By implementing the method, the coke oven can realize the replacement of the ascending pipe when the coke oven is full under the condition of not pushing the coke, avoids the damage of wall bricks of the carbonization chamber caused by pushing the empty coke oven to replace the ascending pipe and the leakage caused by the damage, simultaneously does not need to carry out air pressure sealing and ceramic welding repair on the wall of the carbonization chamber, does not influence the normal discharging sequence, and has good effect on the normal production operation of the coke oven.
With the use of a large number of coke ovens and the improvement of environmental protection consciousness, the coke oven ascending pipe has the conditions of cracking, leakage and smoking in the use process, so the ascending pipe needs to be replaced.
Claims (7)
1. A method for replacing a coke oven riser in a full furnace, comprising the removal of an old riser and the integral installation of a new riser, characterized in that the method comprises the following steps:
the coal gas turning plate of the old ascending pipe is closed, the old ascending pipe cover and the coal charging hole furnace cover are opened,
placing a small chimney on the opened coal charging hole, opening the fire drop hole of the old ascending pipe, extending the compressed air pipe into the fire drop hole, pressing the flame in the carbonization chamber back to the carbonization chamber and stringing out from the small chimney on the opened coal charging port,
closing the old ascending pipe cover, lifting the old ascending pipe vertical pipe, pulling out the compressed air pipe in the fire drop hole, putting the fire retardant cover into the base hole of the ascending pipe of the carbonization chamber, replacing the base, and removing the old ascending pipe;
then integrally hoisting and fixing the new ascending pipe,
high-pressure ammonia water and low-pressure ammonia water are connected into a new ascending pipe,
installing a new water seal pipe of the ascending pipe and pulling a connecting rod for the new ascending pipe.
2. The method for full-scale replacement of the coke oven riser in one piece according to claim 1,
before closing the coal gas turning plate of the old ascending pipe, the water seal pipe of the water seal seat of the old ascending pipe and the small platforms for two-side operation are dismantled.
3. The method for full-scale replacement of the coke oven riser in one piece according to claim 1,
after the fire drop hole of the old ascending pipe is opened, two compressed air pipes are stretched into the fire drop hole for alternately using pressed air, so that the flame originally emerging from the ascending pipe in the carbonization chamber is pressed back to the carbonization chamber and is strung out from a small chimney on the opened coal feeding port.
4. The method for full-scale replacement of the coke oven riser in one piece according to claim 1,
when the old riser cover is closed and the riser vertical pipe is lifted, the compressed air pipe in the fire drop hole is pulled out when the distance between the old riser cover and the riser vertical pipe is 10-20cm away from the old riser base.
5. The method for full-scale replacement of the coke oven riser in one piece according to claim 1,
after the base is replaced and the base is installed in place, the fire retardant cover is taken out, and the old ascending pipe is dismantled.
6. The method for full-scale replacement of the coke oven riser in one piece according to claim 1,
after the integral hoisting and the fixing of the new ascending pipe, a ceramic fiber rope is driven into the bridge pipe bell and spigot, and the bridge pipe bell and spigot is sealed.
7. The method for full-scale replacement of the coke oven riser in one piece according to claim 1,
when high-pressure ammonia water and low-pressure ammonia water are connected into a new ascending pipe, the high-pressure ammonia water and the low-pressure ammonia water are connected into corresponding flange connectors and fastened by bolts, and then a new ascending pipe water seal water pipe and a new ascending pipe connecting rod are installed.
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| CN110760315A (en) * | 2019-10-12 | 2020-02-07 | 常州江南冶金科技有限公司 | Mounting method of riser heat exchanger |
| CN113028375B (en) * | 2021-03-23 | 2022-07-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Atomizing heat transfer device and system |
| CN115216314A (en) * | 2021-04-20 | 2022-10-21 | 中冶宝钢技术服务有限公司 | Construction process for hoisting and replacing ascending pipe and bridge pipe on top of coke oven |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63145391A (en) * | 1986-12-08 | 1988-06-17 | Nippon Steel Corp | Method of repairing riser pipe of coke oven |
| CN105018112A (en) * | 2014-04-29 | 2015-11-04 | 五冶集团上海有限公司 | Method for replacing ascending pipe base of coke oven |
| CN105238420A (en) * | 2015-11-05 | 2016-01-13 | 攀钢集团攀枝花钢钒有限公司 | Coke oven riser tube replacement apparatus and coke oven riser tube replacement method |
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2016
- 2016-05-31 CN CN201610378883.9A patent/CN107446595B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63145391A (en) * | 1986-12-08 | 1988-06-17 | Nippon Steel Corp | Method of repairing riser pipe of coke oven |
| CN105018112A (en) * | 2014-04-29 | 2015-11-04 | 五冶集团上海有限公司 | Method for replacing ascending pipe base of coke oven |
| CN105238420A (en) * | 2015-11-05 | 2016-01-13 | 攀钢集团攀枝花钢钒有限公司 | Coke oven riser tube replacement apparatus and coke oven riser tube replacement method |
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