CN115627310A - Cooling device and method for responding to local temperature rise of side wall of blast furnace hearth - Google Patents
Cooling device and method for responding to local temperature rise of side wall of blast furnace hearth Download PDFInfo
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- CN115627310A CN115627310A CN202211398246.XA CN202211398246A CN115627310A CN 115627310 A CN115627310 A CN 115627310A CN 202211398246 A CN202211398246 A CN 202211398246A CN 115627310 A CN115627310 A CN 115627310A
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- cooling
- blast furnace
- ball valve
- local temperature
- side wall
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/10—Cooling; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
Abstract
The invention belongs to the technical field of blast furnace operation processes, and relates to a cooling device and a cooling method for responding to local temperature rise of a side wall of a blast furnace hearth, wherein a hearth cooling wall H 1 A three-way ball valve is additionally arranged on the section water inlet pipe; the three-way valve is externally connected with a metal hose and is connected with a centrifugal booster pump; connect check valve, ball valve behind the force (forcing) pump and insert the inlet tube with the mode of branch pipe, install the rotameter simultaneously additional behind the check valve and detect real-time flow, in addition, in order to avoid outage or motor trouble can not in time discover, report to the police to well accuse room in the centrifugal pump setting. The invention effectively increases the cooling strength of the local cooling wall, effectively inhibits the phenomenon of local temperature rise of the side wall of the hearth at the last stage of the blast furnace campaign, achieves the aim of slowing down the erosion of the carbon bricks of the hearth, and ensures the production safety of the blast furnace.
Description
Technical Field
The invention belongs to the technical field of blast furnace operation processes, and relates to a cooling device and a cooling method for responding to local temperature rise of a side wall of a blast furnace hearth.
Background
When the blast furnace is in the final stage of the campaign, the erosion of the hearth is serious, the hearth carbon bricks become thin, and the local temperature of the side wall of the hearth is raised, thereby seriously endangering the production safety of the blast furnace.
Although the method of protecting the furnace by schreyerite, reducing smelting strength, damping down and cooling the furnace, increasing the amount of soft water and the like can be adopted for response and can achieve certain effects, the method has certain advantages for the cooling wall H below the furnace hearth elephant foot area, particularly the taphole 1 -H 2 The temperature rise phenomenon of local areas such as sections still needs to be controlled by means; in order to eliminate the adverse effect caused by the local temperature rise of the hearth, a method of increasing the local cooling strength is required.
Disclosure of Invention
In view of this, the invention aims to provide a cooling device and a cooling method for local temperature rise of a side wall of a hearth of a blast furnace, which solve the problem of serious temperature rise of the local side wall of the hearth, relieve erosion of carbon bricks of the blast furnace at the end of campaign and guarantee production safety of the blast furnace.
In order to achieve the purpose, the invention provides the following technical scheme: a cooling device for local temperature increase of the side wall of a blast furnace hearth comprises a cooling wall H arranged on the hearth 1 The section is gone up three-way ball valve on the inlet tube, and three-way ball valve is connected with centrifugal booster pump through external metal collapsible tube, has connect gradually check valve and ball valve through metal collapsible tube after this centrifugal booster pump, and this ball valve inserts furnace hearth cooling wall H with the mode of branch pipe 1 A water inlet pipe is arranged.
Optionally, a rotameter is additionally arranged between the check valve and the ball valve to detect the real-time flow.
Optionally, the motor of the centrifugal booster pump is provided with an alarm device communicated with the central control room, so that power failure or motor faults cannot be found in time.
Optionally, additionally arranged on the cooling wall H of the hearth 1 The three-way ball valve of the section water inlet pipe is lower than the ball valve on the cooling wall H of the furnace hearth 1 The position on the section water inlet pipe is connected out by a three-way ball valve, the centrifugal pump, the check valve and the flowmeter are all in the same loop and connected back by the ball valve, and the integral cooling device is connected with the water inlet pipe in parallel.
Optionally, stave water flow rate 3600m 3 /h，H 1 45 cooling walls are arranged in the section, and the water flow of each cooling wall is 80m 3 H, four branches per cooling wall, and 20m water flow per branch 3 H,2 branch front end merging pipeline water flow 40m 3 /h。
Alternatively, the metal hose has a diameter of 80mm.
Optionally, the centrifugal booster pump adopts a flow rate Q =50m relative to the elevation 6m 3 H, lift H =50m, water pressure > 1.0MPa.
The cooling method for responding to the local temperature rise of the side wall of the blast furnace hearth is applied to the cooling device for responding to the local temperature rise of the side wall of the blast furnace hearth, and comprises the following steps of:
s1, starting a pump, and executing S12-S14 in sequence;
s11, confirming that all pipelines are normally connected before starting, preparing all electrical equipment, requiring that all connecting pipes have no water leakage, water dripping and other problems, and having no water leakage problem before and after a centrifugal booster pump and a connecting flange, and if water leakage is found, carrying out advanced treatment;
s12, opening the ball valve to a communication state;
s13, switching the three-way ball valve to a pipeline communicated with the centrifugal booster pump;
s14, starting a centrifugal booster pump, and finishing the H1 section boosting cooling operation of the furnace hearth cooling wall;
s2, a pump stopping operation step, and S21-S23 are executed in sequence;
s21, stopping operating the centrifugal booster pump;
s22, switching the three-way ball valve to a pipeline communicated with the original soft water;
s23, the ball valve is opened to a water cut-off state;
s3, stopping the pump when the blast furnace is shut down for a long time, and requiring that the booster pump is shut down within 1 hour after the blast furnace is shut down and the water way is changed back; after the air is re-blown, the booster pump is started within 2 hours according to the production condition.
Optionally, the flow rate of the rotameter is larger than the flow rate before starting the pump, i.e. greater than or equal to 5m 3 /h。
The invention has the beneficial effects that: aiming at the phenomenon that the temperature of the local side wall of the blast furnace hearth is seriously increased at the end of the campaign, the invention provides a cooling device and a cooling method capable of relieving and improving the phenomenon, which effectively inhibit the condition that the temperature of the local side wall of the hearth is seriously increased, relieve the erosion of the blast furnace carbon bricks at the end of the campaign and ensure the production safety of the blast furnace.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is an overall schematic view of the present invention.
Reference numerals: the furnace hearth cooling wall H1 section 1, a metal hose 2, a ball valve 3, a rotor flow meter 4, a check valve 5, a centrifugal booster pump 6 and a three-way ball valve 7.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the invention, shown in the drawings are schematic representations and not in the form of actual drawings; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to FIG. 1, a cooling device for local temperature increase of the side wall of the hearth of a blast furnace comprises a cooling wall H disposed on the hearth 1 Three-way ball valve 7 on section 1 inlet tube, three-way ball valve 7 are connected with centrifugal booster pump 6 through external metal collapsible tube 2, and centrifugal booster pump has connect gradually check valve 5 and ball valve 3 through metal collapsible tube 2 this back, and this ball valve 3 inserts furnace hearth cooling wall H with the mode of branch pipe 1 Section 1 inlet tube still adds between check valve 5 and ball valve 3 and is equipped with rotor flow meter 4, detects real-time flow, and centrifugal booster pump 6's motor is provided with the alarm device with well accuse room UNICOM, avoids outage or motor trouble can not in time discover, adds additional and installs at furnace hearth stave H 1 The three-way ball valve 7 of the water inlet pipe of the section 1 is lower than the ball valve 3 and is arranged on the cooling wall H of the furnace hearth 1 The position of the water inlet pipe of the section 1 is connected out by a three-way ball valve 7, the centrifugal pump, the check valve 5 and the flowmeter are all in the same loop and connected back by a ball valve 3, the integral cooling device is connected with the water inlet pipe in parallel, and the water flow of the cooling wall is 3600m 3 H, hearth stave H 1 Section 1 has 45 cooling walls, and each cooling wall has water flow of 80m 3 H, four branches per cooling wall, and water flow rate of each branch is 20m 3 H,2 branch front end merging pipeline water flow 40m 3 H, the diameter of the metal hose 2 is 80mm.
In this example, the centrifugal booster pump 6 was used at a relative elevation of 6m, the top degassing tank at a relative elevation of 46m, and a head drop of about 40m, and the flow rate Q =50m 3 H, lift H =50m, water pressure > 1.0MPa.
When the invention is used, all pipelines are confirmed to be normally connected before starting, all electrical equipment is ready, and all connecting pipes are required to have no water leakage, water dripping and other problems, and the centrifugal booster pump 6 and the connecting flange have no water leakage before and after. Then the ball valve 3 is opened, and the cooling device connected in parallel with the furnace hearth cooling wall H 1 The water inlet end of the section 1 is communicated; then the three-way ball valve 7 is switched to a pipeline communicated with the centrifugal booster pump 6, then the centrifugal booster pump 6 is started, and the furnace hearth cooling wall H 1 The stage 1 charge cooling operation is completed.
The invention effectively increases the cooling strength of the local cooling wall, effectively inhibits the phenomenon that the local temperature of the side wall of the hearth of the blast furnace is increased at the last stage of the service, achieves the aim of slowing down the erosion of the carbon bricks of the hearth, and ensures the production safety of the blast furnace.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a reply local temperature rise's of blast furnace hearth lateral wall cooling device which characterized in that: comprises a cooling wall H arranged on a hearth 1 The section is gone up three-way ball valve on the inlet tube, and three-way ball valve is connected with centrifugal booster pump through external metal collapsible tube, has connect gradually check valve and ball valve through metal collapsible tube after this centrifugal booster pump, and this ball valve inserts furnace hearth cooling wall H with the mode of branch pipe 1 A water inlet pipe is arranged.
2. The cooling device for coping with local temperature rise of the side wall of the blast furnace hearth according to claim 1, wherein: and a rotor flow meter is additionally arranged between the check valve and the ball valve to detect real-time flow.
3. The cooling device for coping with local temperature rise of the side wall of the blast furnace hearth according to claim 1, wherein: the motor of the centrifugal booster pump is provided with an alarm device communicated with the central control room, so that power failure or motor faults cannot be found in time.
4. The cooling device for coping with local temperature rise of the side wall of the blast furnace hearth according to claim 1, wherein: is additionally arranged on a cooling wall H of a hearth 1 The three-way ball valve of the section water inlet pipe is lower than the ball valve on the cooling wall H of the furnace hearth 1 The position on the section water inlet pipe is connected out through a three-way ball valve, the centrifugal pump, the check valve and the flowmeter are all in the same loop and connected back through the ball valve, and the integral cooling device is connected with the water inlet pipe in parallel.
5. The cooling apparatus for coping with local temperature increase of a side wall of a blast furnace hearth according to claim 1, wherein: water flow rate of cooling wall 3600m 3 /h，H 1 45 cooling walls are arranged in the section, and the water flow of each cooling wall is 80m 3 H, four branches per cooling wall, and water flow rate of each branch is 20m 3 H,2 branch front end merging pipeline water flow 40m 3 /h。
6. The cooling apparatus for coping with local temperature increase of a side wall of a blast furnace hearth according to claim 1, wherein: the diameter of the metal hose is 80mm.
7. The cooling device for coping with local temperature rise of the side wall of the blast furnace hearth according to claim 1, wherein: the relative elevation of the centrifugal booster pump is 6m, and the adopted flow rate Q =50m 3 H, lift H =50m, water pressure > 1.0MPa.
8. A cooling method for coping with local temperature rise of a blast furnace hearth side wall, applying the cooling device for coping with local temperature rise of a blast furnace hearth side wall according to any one of claims 1 to 7, characterized by comprising the steps of:
s1, starting a pump, and executing S12-S14 in sequence;
s11, confirming that all pipelines are normally connected before starting, preparing all electrical equipment, requiring that all connecting pipes have no water leakage, water dripping and other problems, and having no water leakage problem before and after a centrifugal booster pump and a connecting flange, and if water leakage is found, carrying out advanced treatment;
s12, opening the ball valve to a communication state;
s13, switching the three-way ball valve to a pipeline communicated with the centrifugal booster pump;
s14, starting a centrifugal booster pump, and finishing the H1 section boosting cooling operation of the furnace hearth cooling wall;
s2, a pump stopping operation step, and S21-S23 are executed in sequence;
s21, stopping operating the centrifugal booster pump;
s22, switching the three-way ball valve to a pipeline communicated with the original soft water;
s23, the ball valve is driven to a water cut-off state;
s3, stopping the pump when the blast furnace is shut down for a long time, and stopping the booster pump and changing the water way back within 1 hour after the blast furnace is shut down; after the air is re-blown, the booster pump is started within 2 hours according to the production condition.
9. The method of claim 1, wherein the cooling of the local temperature increase of the side wall of the blast furnace hearth is performed by: the flow rate of the rotameter is larger than that before starting the pump, namely, the flow rate is more than or equal to 5m 3 /h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211398246.XA CN115627310A (en) | 2022-11-09 | 2022-11-09 | Cooling device and method for responding to local temperature rise of side wall of blast furnace hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211398246.XA CN115627310A (en) | 2022-11-09 | 2022-11-09 | Cooling device and method for responding to local temperature rise of side wall of blast furnace hearth |
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| CN115627310A true CN115627310A (en) | 2023-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211398246.XA Pending CN115627310A (en) | 2022-11-09 | 2022-11-09 | Cooling device and method for responding to local temperature rise of side wall of blast furnace hearth |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0873910A (en) * | 1994-09-02 | 1996-03-19 | Nippon Steel Corp | Method for cooling furnace body of blast furnace |
| JPH1163577A (en) * | 1997-08-14 | 1999-03-05 | Takasago Thermal Eng Co Ltd | Local cooling device for clean room |
| WO2002048406A1 (en) * | 2000-12-11 | 2002-06-20 | Paul Wurth S.A. | Cooling system for a metallurgical smelting furnace |
| CN103740877A (en) * | 2013-12-20 | 2014-04-23 | 鞍钢股份有限公司 | Device for retarding erosion of blast furnace hearth and application method thereof |
| CN204529889U (en) * | 2015-02-25 | 2015-08-05 | 鞍钢股份有限公司 | Improve blast furnace hearth monolithic cooling stave cooling intensity device |
| CN111270035A (en) * | 2020-04-07 | 2020-06-12 | 大冶特殊钢有限公司 | Cooling system for slowing down damage of local cooling wall of blast furnace hearth |
| CN114058752A (en) * | 2021-10-13 | 2022-02-18 | 武汉钢铁有限公司 | Blast furnace cooling device |
-
2022
- 2022-11-09 CN CN202211398246.XA patent/CN115627310A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0873910A (en) * | 1994-09-02 | 1996-03-19 | Nippon Steel Corp | Method for cooling furnace body of blast furnace |
| JPH1163577A (en) * | 1997-08-14 | 1999-03-05 | Takasago Thermal Eng Co Ltd | Local cooling device for clean room |
| WO2002048406A1 (en) * | 2000-12-11 | 2002-06-20 | Paul Wurth S.A. | Cooling system for a metallurgical smelting furnace |
| CN103740877A (en) * | 2013-12-20 | 2014-04-23 | 鞍钢股份有限公司 | Device for retarding erosion of blast furnace hearth and application method thereof |
| CN204529889U (en) * | 2015-02-25 | 2015-08-05 | 鞍钢股份有限公司 | Improve blast furnace hearth monolithic cooling stave cooling intensity device |
| CN111270035A (en) * | 2020-04-07 | 2020-06-12 | 大冶特殊钢有限公司 | Cooling system for slowing down damage of local cooling wall of blast furnace hearth |
| CN114058752A (en) * | 2021-10-13 | 2022-02-18 | 武汉钢铁有限公司 | Blast furnace cooling device |
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