CN115109876B - Anti-blocking control method for blast furnace material tank and blast furnace system - Google Patents
Anti-blocking control method for blast furnace material tank and blast furnace system Download PDFInfo
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- CN115109876B CN115109876B CN202210662315.7A CN202210662315A CN115109876B CN 115109876 B CN115109876 B CN 115109876B CN 202210662315 A CN202210662315 A CN 202210662315A CN 115109876 B CN115109876 B CN 115109876B
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- charging bucket
- preset value
- charging
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- 239000000463 material Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000001514 detection method Methods 0.000 claims description 28
- 230000000740 bleeding effect Effects 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 239000000571 coke Substances 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 description 10
- 230000000903 blocking effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/006—Automatically controlling the process
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an anti-blocking control method for a blast furnace material tank, which comprises the following steps: after the system receives the emptying signal, whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place are sequentially judged: if so, detecting and judging whether the pressure in the charging bucket is not greater than a preset value, and if so, feeding by a feeding system; if the pressure in the charging bucket is greater than the preset value, carrying out pressure equalizing gas recovery in the charging bucket until the pressure in the charging bucket is not greater than the preset value; otherwise, the method repeatedly and sequentially judges whether the diffusing valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper is moved into place or not until the diffusing valve is opened, the upper sealing valve is opened and the movable receiving hopper is moved into place. According to the anti-blocking control method for the blast furnace material tank, through two layers of judgment, the phenomenon that the tank is blocked due to overflow of the tank caused by accumulated coke can be avoided after the movable receiving hopper moves to the upper part of the other tank.
Description
Technical Field
The invention relates to the technical field of blast furnaces, in particular to an anti-blocking control method for a blast furnace material tank and a blast furnace system.
Background
With the continuous progress of blast furnace ironmaking technology, and the current production demands of environmental protection, energy saving and consumption reduction, the blast furnace nowadays mostly adopts a blast furnace material tank equalizing gas recovery system to recover the gas needing to be diffused after equalizing the pressure of the charging tank.
After the equalizing gas recovery is carried out on the blast furnace in the prior art, residual pressure still exists in the charging bucket, so that when the charging car charges coke into the charging bucket, the coke can not be smoothly charged into the charging bucket due to the fact that the specific gravity of the coke pile is lower than that of ore, the coke is accumulated in the movable receiving hopper at the upper half part of the charging bucket, and when the movable receiving hopper moves to the upper part of another charging bucket, the accumulated coke completely enters the charging bucket, and the charging bucket overflows to cause the phenomenon of blocking the charging bucket, so that the production efficiency of the blast furnace in the prior art is reduced.
Disclosure of Invention
Therefore, the invention aims to solve the technical problem that residual pressure remains in the charging bucket after the equalizing gas is recovered in the prior art, so that the charging bucket finally overflows to cause the phenomenon of blocking the charging bucket, and therefore, the blast furnace charging bucket anti-blocking control method and the blast furnace system with high production efficiency are provided.
In order to solve the technical problems, the invention provides an anti-blocking control method for a blast furnace material tank, which comprises the following steps:
After receiving the emptying signal, judging whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place or not in sequence:
If so, detecting and judging whether the pressure in the charging bucket is not greater than a preset value, and if so, feeding by a feeding system; if the pressure in the charging bucket is greater than the preset value, carrying out pressure equalizing gas recovery in the charging bucket until the pressure in the charging bucket is not greater than the preset value;
Otherwise, the method repeatedly and sequentially judges whether the diffusing valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper is moved into place or not until the diffusing valve is opened, the upper sealing valve is opened and the movable receiving hopper is moved into place.
As a further improvement of the invention, when the pressure in the charging bucket is larger than a preset value, the pressure equalizing gas is recovered in the charging bucket until the pressure in the charging bucket is not larger than the preset value, and after the pressure equalizing gas is recovered repeatedly exceeding the preset value for times, if the pressure in the charging bucket is still larger than the preset value, the gas in the charging bucket is directly discharged until the pressure in the charging bucket is not larger than the preset value.
As a further improvement of the invention, when the gas in the charging bucket is directly discharged, the pressure equalizing gas recovery system is manually or automatically intervened to temporarily stop working.
As a further improvement of the invention, when the pressure in the charging bucket is larger than a preset value, the pressure equalizing gas recovery is carried out in the charging bucket until the pressure in the charging bucket is not larger than the preset value, and the system sends alarm information of abnormal gas recovery to the control end.
As a further improvement of the invention, when detecting and judging whether the pressure in the charging bucket is not more than a preset value, the preset value is defined according to the charging bucket volume.
In order to solve the technical problems, the invention also provides a blast furnace system, and the blast furnace system is controlled to operate according to the blast furnace material tank anti-blocking control method, which comprises the following steps:
A charging bucket;
the bleeding valve is arranged on the charging bucket and is communicated with the interior of the charging bucket;
the upper sealing valve is arranged at the top of the charging bucket;
the receiving hopper is arranged above the charging bucket and can move relative to the charging bucket;
the detection module is used for detecting whether the opening and closing state of the bleeding valve, the opening and closing state of the upper sealing valve, the receiving hopper moves in place or not and whether the pressure in the charging bucket is not more than a preset value or not;
the gas recovery module is used for recovering the gas in the charging bucket;
the feeding module is used for feeding materials into the charging tank;
the main control module is used for transmitting a first instruction to the detection module when the relief valve is in an open state, the upper sealing valve is in an open state and the receiving hopper moves in place; when the bleeding valve is in a closed state, the upper sealing valve is in a closed state or the receiving hopper is not moved in place, the detection module transmits a second instruction to the main control module;
When the main control module receives a first instruction, the main control module controls the gas recovery module to work and detects whether the pressure in the charging tank is not greater than a preset value or not through the detection module, if the pressure in the charging tank is not greater than the preset value, the main control module controls the feeding module to work, and if the pressure in the charging tank is greater than the preset value, the main control module controls the gas recovery module to work until the pressure in the charging tank is not greater than the preset value;
when the main control module receives the second instruction, the main control module controls the detection module to continue to detect until the main control module receives the first instruction.
As a further improvement of the invention, when the pressure in the charging bucket is larger than a preset value, the main control module controls the gas recovery module to work until the pressure in the charging bucket is not larger than the preset value, and after the pressure equalizing gas is recovered repeatedly exceeding the preset value for times, if the pressure in the charging bucket is still larger than the preset value, the main control module controls the relief valve to open so that the gas in the charging bucket is directly discharged until the pressure in the charging bucket is not larger than the preset value.
As a further improvement of the invention, when the main control module controls the relief valve to be opened so as to enable the gas in the charging bucket to be directly discharged, the pressure equalizing gas recovery system is manually or automatically interfered by the main control module, so that the pressure equalizing gas recovery system is temporarily stopped.
As a further improvement of the invention, when the pressure in the charging bucket is larger than a preset value, the main control module controls the gas recovery module to work until the pressure in the charging bucket is not larger than the preset value, and the main control module sends alarm information of abnormal gas recovery to the control end.
As a further improvement of the invention, the preset value is defined according to the volume of the charging bucket when the detection module detects whether the pressure in the charging bucket is not greater than the preset value.
Compared with the prior art, the technical scheme of the invention has the following advantages:
According to the anti-blocking control method for the blast furnace material tank, whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place is judged, and if so, whether the pressure in the material tank is not larger than a preset value is further detected and judged, and the material in the material tank is fed on the premise that the pressure in the material tank is not larger than the preset value is ensured, so that coke is prevented from being accumulated in the movable receiving hopper at the upper half part of the material tank, and the phenomenon of tank blocking caused by overflow of the material tank due to accumulated coke is avoided after the movable receiving hopper moves to the upper part of another material tank, and the production efficiency of the blast furnace system can be improved.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which:
Fig. 1 is a flow chart illustrating a method for controlling blocking prevention of a blast furnace tank in a preferred embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
It will be understood that when an element is referred to as being "disposed" or "fixed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "fixedly disposed" on or "fixedly connected" to another element, it can be detachably or non-detachably fixed therebetween. When an element is referred to as being "connected," "rotatably connected," or "rotatably connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like are used for illustration purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first," "second," "third," and the like in this disclosure are used for descriptive purposes and not for describing particular amounts or sequences, but for distinguishing between similar names.
Embodiment one:
Referring to fig. 1, the present embodiment provides a blast furnace tank anti-blocking control method, comprising the steps of:
After receiving the emptying signal, judging whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place or not in sequence:
If so, detecting and judging whether the pressure in the charging bucket is not greater than a preset value, and if so, feeding by a feeding system; if the pressure in the charging bucket is greater than the preset value, carrying out pressure equalizing gas recovery in the charging bucket until the pressure in the charging bucket is not greater than the preset value;
Otherwise, the method repeatedly and sequentially judges whether the diffusing valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper is moved into place or not until the diffusing valve is opened, the upper sealing valve is opened and the movable receiving hopper is moved into place.
Before feeding in the feeding system, whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place is judged sequentially, if yes, whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place is continuously detected and judged, if yes, the feeding system can feed materials only if the pressure in the charging system is not greater than the preset value, if the pressure in the charging system is greater than the preset value, the equalizing gas is recycled in the charging system until the pressure in the charging system is not greater than the preset value, if any judging structure is no, whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place is repeatedly judged, until the judging result is yes, and through two layers of judgment before the charging system feeds materials, the coke can be prevented from being accumulated in the movable receiving hopper at the upper half part of the charging system under the condition that the charging pressure of the charging system is not greater than the preset value, the coke can be prevented from being accumulated in the charging system after the movable receiving hopper moves to the upper part of another charging system, and the coke can be prevented from being overflowed due to the fact that the coke can be accumulated after the coke can be prevented from being moved to the production efficiency.
In one embodiment, when the pressure in the charging bucket is greater than a preset value, the pressure equalizing gas is recovered in the charging bucket until the pressure in the charging bucket is not greater than the preset value, and after the pressure equalizing gas is recovered repeatedly exceeding the preset value for a plurality of times, if the pressure in the charging bucket is still greater than the preset value, the gas in the charging bucket is directly discharged until the pressure in the charging bucket is not greater than the preset value.
After the equalizing gas is recovered repeatedly exceeding the preset value, if the pressure in the charging bucket is still greater than the preset value, the residual pressure in the charging bucket cannot be reduced in the equalizing gas recovery mode, at the moment, the gas in the charging bucket is directly discharged until the pressure in the charging bucket is not greater than the preset value, and therefore the pressure in the charging bucket is not greater than the preset value during feeding of the feeding system.
In one embodiment, when the gas in the charging bucket is directly discharged, the pressure equalizing gas recovery system is manually or automatically intervened to temporarily stop working.
When the gas in the charging bucket is directly discharged, the pressure in the charging bucket can be adjusted more flexibly through manual intervention of the pressure equalizing gas recovery system, so that production is recovered as soon as possible, and the pressure in the charging bucket can be adjusted at the first abnormal time through automatic intervention of the pressure equalizing gas recovery system, so that recovery production is further accelerated.
In one embodiment, when the pressure in the charging bucket is greater than a preset value, the pressure equalizing gas recovery is performed in the charging bucket, and when the pressure in the charging bucket is not greater than the preset value, the system sends alarm information of abnormal gas recovery to the control end.
The system sends the alarm information of abnormal gas recovery to the control end, so that operators can know production fault information on site at the first time, and the operators can make corresponding countermeasures at the first time.
In one embodiment, the preset value is defined according to the tank volume when detecting and determining whether the pressure in the tank is not greater than the preset value.
The pressure in the charging tanks is different due to the different internal volumes of the charging tanks with different volumes, so that different preset values are formulated for the charging tanks with different volumes, and the application range of the method is wider.
Embodiment two:
the present embodiment provides a blast furnace system, according to a blast furnace material tank anti-blocking control method in the first embodiment, for controlling operation of the blast furnace system, including:
A charging bucket;
the bleeding valve is arranged on the charging bucket and is communicated with the interior of the charging bucket;
The upper sealing valve and the lower sealing valve are respectively arranged at the top and the bottom of the charging bucket;
the receiving hopper is arranged above the charging bucket and can move relative to the charging bucket;
the detection module is used for detecting whether the opening and closing state of the bleeding valve, the opening and closing state of the upper sealing valve, the receiving hopper moves in place or not and whether the pressure in the charging bucket is not more than a preset value or not;
the gas recovery module is used for recovering the gas in the charging bucket;
the feeding module is used for feeding materials into the charging tank;
the main control module is used for transmitting a first instruction to the detection module when the relief valve is in an open state, the upper sealing valve is in an open state and the receiving hopper moves in place; when the bleeding valve is in a closed state, the upper sealing valve is in a closed state or the receiving hopper is not moved in place, the detection module transmits a second instruction to the main control module;
When the main control module receives a first instruction, the main control module controls the gas recovery module to work and detects whether the pressure in the charging tank is not greater than a preset value or not through the detection module, if the pressure in the charging tank is not greater than the preset value, the main control module controls the feeding module to work, and if the pressure in the charging tank is greater than the preset value, the main control module controls the gas recovery module to work until the pressure in the charging tank is not greater than the preset value;
when the main control module receives the second instruction, the main control module controls the detection module to continue to detect until the main control module receives the first instruction.
Before the feeding module feeds materials into the charging bucket, the detection module is used for detecting whether the opening and closing state of the relief valve, the opening and closing state of the upper sealing valve and the receiving hopper move in place, if the detection results are yes, the detection module is used for further detecting whether the pressure in the charging bucket is not greater than a preset value, when the detection results are yes, the feeding module can feed materials into the charging bucket, when the detection results are no, the gas recovery module is used for carrying out pressure equalizing gas recovery in the charging bucket until the detection module detects that the pressure in the charging bucket is not greater than the preset value, and when the detection module detects whether the opening and closing state of the relief valve, the opening and closing state of the upper sealing valve and the receiving hopper move in place, if any one of the detection results is no, the detection module is used for repeatedly detecting the opening and closing state of the relief valve, the opening and closing state of the upper sealing valve and the receiving hopper in place in sequence until the detection results are all yes, and the two-layer detection results are achieved, and feeding of the charging module can be ensured on the premise that the pressure in the charging bucket is not greater than the preset value is avoided.
In one embodiment, the main control module controls the gas recovery module to work until the pressure in the charging bucket is not greater than a preset value, and after the pressure equalizing gas is recovered repeatedly exceeding the preset value for times, if the pressure in the charging bucket is still greater than the preset value, the main control module controls the relief valve to open so that the gas in the charging bucket is directly discharged until the pressure in the charging bucket is not greater than the preset value.
After the equalizing gas is recovered repeatedly exceeding the preset value, if the pressure in the charging bucket is still greater than the preset value, the residual pressure in the charging bucket can not be reduced through equalizing gas recovery of the gas recovery module, and at the moment, the discharging valve is opened to enable the gas in the charging bucket to be directly discharged until the pressure in the charging bucket is not greater than the preset value, and then the charging module is used for charging normally.
In one embodiment, when the main control module controls the relief valve to be opened so as to enable the gas in the charging bucket to be discharged directly, the pressure equalizing gas recovery system is manually or automatically interfered by the main control module, so that the pressure equalizing gas recovery system is temporarily stopped.
When the gas in the charging bucket is directly discharged, the pressure equalizing gas recovery system temporarily stops working through the manual intervention of the main control module, the on-site operators can conveniently and flexibly adjust the pressure in the charging bucket through the manual intervention, and the pressure in the charging bucket can be adjusted at the first time when the abnormality occurs through the automatic intervention of the active module, so that the recovery production is further quickened.
In one embodiment, the main control module controls the gas recovery module to work when the pressure in the charging bucket is larger than a preset value, and the main control module sends alarm information of abnormal gas recovery to the control end when the pressure in the charging bucket is not larger than the preset value.
When the pressure in the charging bucket is larger than a preset value, the main control module controls the gas recovery module to work, and meanwhile, the main control module sends alarm information of abnormal gas recovery to the control end, so that operators can be notified at the first time, and after the operators know production fault information on site, corresponding countermeasures are taken.
In one embodiment, when the detection module detects whether the pressure in the charging bucket is not greater than a preset value, the preset value is defined according to the volume of the charging bucket.
Because the pressure that forms in the material jar of different volumes is different, therefore need to formulate different preset value to the material jar of different volumes to when guaranteeing the feeding system material loading, coke can get into the lower half section in the material jar and not in the hopper of the upper half section in the material jar, thereby make this blast furnace system's application scope wider.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (1)
1. An anti-blocking control method for a blast furnace tank, comprising the steps of:
A charging bucket;
the bleeding valve is arranged on the charging bucket and is communicated with the interior of the charging bucket;
the upper sealing valve is arranged at the top of the charging bucket;
the receiving hopper is arranged above the charging bucket and can move relative to the charging bucket;
the detection module is used for detecting whether the opening and closing state of the bleeding valve, the opening and closing state of the upper sealing valve, the receiving hopper moves in place or not and whether the pressure in the charging bucket is not more than a preset value or not;
the gas recovery module is used for recovering the gas in the charging bucket;
the feeding module is used for feeding materials into the charging tank;
the main control module is used for transmitting a first instruction to the detection module when the relief valve is in an open state, the upper sealing valve is in an open state and the receiving hopper moves in place; when the bleeding valve is in a closed state, the upper sealing valve is in a closed state or the receiving hopper is not moved in place, the detection module transmits a second instruction to the main control module;
When the main control module controls the relief valve to be opened so as to enable the gas in the charging bucket to be discharged directly, the main control module intervenes in the pressure equalizing gas recovery system manually or automatically to enable the pressure equalizing gas recovery system to stop working temporarily;
When the main control module receives a first instruction, the main control module controls the gas recovery module to work, and detects whether the pressure in the charging tank is not more than a preset value or not through the detection module, if the pressure in the charging tank is not more than the preset value, the main control module controls the feeding module to work, and when the pressure in the charging tank is not more than the preset value, the main control module controls the gas recovery module to work until the pressure in the charging tank is not more than the preset value, after the pressure-equalizing gas recovery which exceeds the preset value repeatedly is repeated, if the pressure in the charging tank is still more than the preset value, the main control module controls the relief valve to open so that the gas in the charging tank is directly discharged, until the pressure in the charging tank is not more than the preset value, the system sends alarm information of abnormal gas recovery to the control end, and when the gas in the charging tank is directly discharged, the pressure-equalizing gas recovery system is manually or automatically intervened, so that the operation is temporarily stopped;
When the main control module receives the second instruction, the main control module controls the detection module to continue to detect until the main control module receives the first instruction;
when detecting and judging whether the pressure in the charging bucket is not greater than a preset value, defining the preset value according to the charging bucket volume;
the working method of the blast furnace material tank anti-blocking control method comprises the following steps:
After receiving the emptying signal, judging whether the relief valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper moves in place or not in sequence:
If so, detecting and judging whether the pressure in the charging bucket is not greater than a preset value, and if so, feeding by a feeding system; if the pressure in the charging bucket is greater than the preset value, carrying out pressure equalizing gas recovery in the charging bucket until the pressure in the charging bucket is not greater than the preset value;
Otherwise, the method repeatedly and sequentially judges whether the diffusing valve is opened, whether the upper sealing valve is opened and whether the movable receiving hopper is moved into place or not until the diffusing valve is opened, the upper sealing valve is opened and the movable receiving hopper is moved into place.
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| CN104988262A (en) * | 2015-08-04 | 2015-10-21 | 武汉钢铁(集团)公司 | Blast furnace pressure equalizing system and blast furnace top charging method |
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| KR100793578B1 (en) * | 2001-12-20 | 2008-01-14 | 주식회사 포스코 | Apparatus for press controlling of hopper of blast furnace |
| KR100919024B1 (en) * | 2002-12-05 | 2009-09-24 | 주식회사 포스코 | Apparatus for rapid discharging of pressure in hopper for blast furnace |
| KR101153589B1 (en) * | 2005-10-26 | 2012-06-11 | 주식회사 포스코 | An appratus for controlling feed hopper empty signAn appratus for controlling feed hopper empty signal automatically al automatically |
| CN102732656A (en) * | 2012-07-17 | 2012-10-17 | 新兴铸管股份有限公司 | Method for cleaning blockage of bell-less furnace top pressure equalizing relief pipeline of blast furnace |
| CN106755671A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of top gas handling process and its system |
| CN211645291U (en) * | 2019-11-29 | 2020-10-09 | 张家港宏昌钢板有限公司 | Pressure-equalizing diffusion maintenance pipeline for maintenance of charging bucket |
| CN111809010A (en) * | 2020-06-19 | 2020-10-23 | 中钢设备有限公司 | Blast furnace top gas pressure-equalizing bleeding system and control method thereof |
| CN113943841A (en) * | 2021-10-12 | 2022-01-18 | 中冶南方工程技术有限公司 | Pressure-equalizing gas purification and recovery system and method for blast furnace top charging bucket |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104988262A (en) * | 2015-08-04 | 2015-10-21 | 武汉钢铁(集团)公司 | Blast furnace pressure equalizing system and blast furnace top charging method |
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