CN105368999A - Purging device and technology of blast furnace charging bucket weighing system - Google Patents
Purging device and technology of blast furnace charging bucket weighing system Download PDFInfo
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- CN105368999A CN105368999A CN201510875495.7A CN201510875495A CN105368999A CN 105368999 A CN105368999 A CN 105368999A CN 201510875495 A CN201510875495 A CN 201510875495A CN 105368999 A CN105368999 A CN 105368999A
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Abstract
The invention discloses a purging device and technology of a blast furnace charging bucket weighing system. The purging device comprises a ripple compensator purging mechanism and a lower valve box purging mechanism, wherein the ripple compensator purging mechanism comprises a first pipeline, and a first manual block valve, a first valve, a first pressure meter, a first one-way valve and a first decompression valve which are sequentially arranged on the first pipeline from outside to inside; the outer end of the first pipeline is connected with a nitrogen source; the inner end of the first pipeline is connected with the inner cavity of a ripple compensator; the lower valve box purging mechanism comprises a second pipeline, and a second manual block valve, a second valve, a second pressure meter, a second one-way valve and a second decompression valve which are sequentially arranged on the second pipeline from outside to inside; the outer end of the second pipeline is connected with a nitrogen source; and the inner end of the second pipeline is connected with a cavity. According to the purging device, the dusty gas can be effectively prevented from flowing or spreading into the inner cavity of the ripple compensator and the clearance between the bottom of a material flow regulating valve chute and the outer shell of a lower valve box.
Description
Technical field
The present invention relates to a kind of furnace top material tank for blast furnace Weighing system, be specifically related to a kind of blast furnace bucket Weighing system blow device and technique.
Background technology
In blast fumance, the temperatures as high of blast furnace roof space center about 700 DEG C, furnace roof space pressure is at about 2.5MPa, and raw material loads in State of Blast Furnace from the stove of normal pressure, and according to the requirement of operator by feed distribution on charge level.Above-mentioned functions is completed by bell-less furnace top, and bell-less furnace top has various ways, and wherein old-fashioned bell-less with parallel hoppers is early stage a kind of structure formation.In charging technique, need by Weighing system complete batch can and fill the weighing of the weight of raw material, for the control of charging process, and prevent the generation of the accidents such as batch mixing, swollen material, flash.
As shown in Figure 1, old-fashioned bell-less with parallel hoppers Weighing system major constituents: the approach cone 5 of material flow gate and the Flange joint of batch can 1 bottom, the shell of the approach cone 5 of material flow gate is connected with lower clack box 4 entrance with FlexbleJoint 7, the entirety that batch can 1 and material flow gate are formed is seated in 3 LOAD CELLS 3, for guaranteeing the accuracy weighed, pressure-equalizing and discharging pipe 8 adopts flexible FlexbleJoint 9 to be connected with batch can 1, and other structure does not all contact with batch can.For preventing dust from entering FlexbleJoint 7 inner chamber, be provided with the grey ring of resistance in the bottom of FlexbleJoint 7, the circular hole hindering grey ring and lower clack box upper cover plate forms an annular gap.
In actual production, lower sealing valve is opened, and raw material exports and falls on blast furnace charge level through material flow gate, central throat tube, distributor chute from batch can.Stock gas adverse current enters batch can, due to diffusion and the sedimentation of dust, the gap location bottom FlexbleJoint inner chamber and material flow gate chute and between lower clack box shell is easily caused to build up dust, through after a while, these dusts understand compacting, hardening forms harder grey knurl, and the grey knurl hardened can form an additional force upwards to material flow gate, the gravimetric value causing LOAD CELLS to export diminishes.
Current deashing measure is for offer ash removing opening in lower clack box both sides, daily damping down can open the grey knurl bottom this ash removing opening cleaning material flow gate chute and between lower clack box shell, but because of structural limitations, some positions are often cleared up unclean, and the circular clearance bottom material flow gate chute and between lower clack box shell surrounds by peripheral structure, cannot clear up at ordinary times.The blast furnace non-bell top of this structure is generally in production after 3 years, and FlexbleJoint inner chamber dust can accumulate compacting and form grey knurl, is the weighing precision of replying batch can scale, needs the deashing carrying out FlexbleJoint inner chamber.But because working space is very narrow and small, this method can only clean out the grey knurl of a part, and if do not taken measures, the dust stratification cycle is by shorter and shorter.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of blast furnace bucket Weighing system blow device and technique are provided, the gap that it can stop dusty gas to flow into or be diffused into bottom FlexbleJoint inner chamber and material flow gate chute and between lower clack box shell effectively, thus stop to produce grey knurl in these two regions, ensure that Weighing system not by External force interference, guarantee the accuracy weighed, be conducive to the accurate cloth of blast furnace, improve iron output, reduce coke ratio, finally reduce pig iron cost.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of blast furnace bucket Weighing system blow device, described Weighing system comprises: comprise batch can, material flow gate, 3 LOAD CELLS and lower clack box, the approach cone of described material flow gate is connected with the bottom of batch can, the entirety that described batch can and material flow gate are formed is seated in described 3 LOAD CELLS, described lower clack box is arranged on outside material flow gate, and and be provided with cavity between material flow gate, the outer setting of the approach cone of described material flow gate has FlexbleJoint, the bottom of the approach cone of described material flow gate is provided with the grey ring of resistance, annular gap is provided with between the upper cover plate of the grey ring of described resistance and lower clack box, the inner chamber of described FlexbleJoint with by this annular gap and described cavity connects, described blow device comprises FlexbleJoint blowing mechanism and lower clack box blowing mechanism,
Described FlexbleJoint blowing mechanism comprises the first pipeline, is successively set on the first manual trip valve, the first valve, the first pressure warning unit, the first check valve and the first pressure release valve on described first pipeline from outside to inside, the outer end of described first pipeline is connected with source nitrogen, described the inner of first pipeline is connected with the inner chamber of FlexbleJoint, and the outlet of described first pressure release valve is communicated with air;
Described lower clack box blowing mechanism comprises second pipe, is successively set on the second manual trip valve, the second valve, the second pressure warning unit, the second check valve and the second pressure release valve on described second pipe from outside to inside, the outer end of described second pipe is connected with source nitrogen, the inner of described second pipe is connected with described cavity, and the outlet of described second pressure release valve is communicated with air.
By technique scheme, the inner of described first pipeline is divided into multiple arm, and all arms are connected with the inner chamber of FlexbleJoint.
By technique scheme, described first valve is variable valve, trip valve or adjustment trip valve.
By technique scheme, described first pipeline is provided with restrictor, described restrictor is valve or restriction orifice.
By technique scheme, the inner of described second pipe is divided into multiple arm, and all arms are connected with described cavity.
By technique scheme, described second valve is variable valve, trip valve or adjustment trip valve.
Accordingly, the present invention also provides a kind of blast furnace bucket Weighing system purging process, comprises the following steps:
S1, load that batch can, batch can are all pressed at raw material, lower close valve open before, batch can is in the process of blowing in blast furnace, open the first valve of FlexbleJoint blowing mechanism and the second valve of lower clack box blowing mechanism, nitrogen enters the inner chamber of FlexbleJoint and lower cavity between clack box and material flow gate respectively by the first pipeline and second pipe, the pressure of the nitrogen passed in two pipelines is higher than blast furnace top pressure, during system works, the first manual trip valve and the second manual trip valve are in opened condition;
S2, when the nitrogen pressure that the first pressure warning unit detects in the first pipeline exceedes set(ting)value, close the first valve, first pressure release valve opens pressure release automatically, and report to the police, when the nitrogen pressure that the second pressure warning unit detects in second pipe exceedes set(ting)value, close the second valve, the second pressure release valve opens pressure release automatically, and reports to the police;
S3, other times, close the first valve and the second valve, stops passing into nitrogen.
The beneficial effect that the present invention produces is: the present invention is by arranging FlexbleJoint blowing mechanism and lower clack box blowing mechanism, nitrogen is led to respectively to the inner chamber of ripple compensation, the cavity between lower clack box and material flow gate, malleation is produced in these two chambeies, dusty gas can be effectively stoped to flow into or be diffused into this two regions, thus stop the generation of grey knurl, ensure Weighing system not by External force interference, guarantee the accuracy weighed, be conducive to the accurate cloth of blast furnace, improve iron output, reduce coke ratio, finally reduce pig iron cost.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of blast furnace bucket Weighing system;
Fig. 2 is the structural representation of the embodiment of the present invention;
Fig. 3 is the enlarged diagram at I place in Fig. 2.
In figure: 1-batch can, 2-material flow gate, 3-LOAD CELLS, clack box under 4-, the approach cone of 5-material flow gate, 7-FlexbleJoint, 8-pressure-equalizing and discharging pipe, 10-hinders grey ring, clack box upper cover plate under 11-, 12-annular gap, 19-cavity, 20-first pipeline, 22-first valve, 24 first pressure release valves, 26-first pressure warning unit, the manual trip valve of 27-first, 28-first check valve, 29-restrictor, 30-second pipe, 32-second valve, 34-second pressure release valve, 36-second pressure warning unit, the manual trip valve of 37-second, 38-second check valve.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1-Figure 3, a kind of blast furnace bucket Weighing system blow device, Weighing system comprises: comprise batch can 1, material flow gate 2, 3 LOAD CELLS 3 and lower clack box 4, the approach cone 5 of material flow gate is connected with the bottom of batch can 2, the entirety that batch can 2 and material flow gate 2 are formed is seated in 3 LOAD CELLS 3, lower clack box 4 is arranged on outside material flow gate 2, and and be provided with cavity 19 between material flow gate 2, the outer setting of the approach cone 5 of material flow gate has FlexbleJoint 7, the bottom of the approach cone 5 of material flow gate is provided with the grey ring 10 of resistance, hinder between grey ring 10 and lower clack box upper cover plate 11 and be provided with annular gap 12, the inner chamber of FlexbleJoint 7 is communicated with cavity 19 with by this annular gap 12, blow device comprises FlexbleJoint blowing mechanism and lower clack box blowing mechanism,
FlexbleJoint blowing mechanism comprises the first pipeline 20, is successively set on the first manual trip valve 27, first valve 22, first pressure warning unit 26, first check valve 28 and the first pressure release valve 24 on the first pipeline 20 from outside to inside, the outer end of the first pipeline 20 is connected with source nitrogen, the inner of first pipeline 20 is connected with the inner chamber of FlexbleJoint 7, and the outlet of the first pressure release valve 24 is communicated with air;
Lower clack box blowing mechanism comprises second pipe 30, is successively set on the second manual trip valve 37, second valve 32, second pressure warning unit 36, second check valve 38 and the second pressure release valve 34 on second pipe 30 from outside to inside, the outer end of second pipe 30 is connected with source nitrogen, the inner of second pipe 30 is connected with cavity 19, and the outlet of the second pressure release valve 34 is communicated with air.
In a preferred embodiment of the invention, the inner of the first pipeline is divided into multiple arm, and all arms are connected with the inner chamber of FlexbleJoint, to ensure that nitrogen passes into the inner chamber of FlexbleJoint uniformly.
In a preferred embodiment of the invention, the first valve is variable valve, trip valve or adjustment trip valve.
In a preferred embodiment of the invention, as shown in Figure 2, the first pipeline 20 is provided with restrictor 29, restrictor is valve or restriction orifice, for controlling, regulating nitrogen flow size, prevents the nitrogen flow passing into FlexbleJoint excessive.
In a preferred embodiment of the invention, the inner of second pipe is divided into multiple arm, and all arms are connected with cavity, to ensure that nitrogen passes into cavity uniformly.
In a preferred embodiment of the invention, the second valve is variable valve, trip valve or adjustment trip valve.
Accordingly, the present invention also provides a kind of blast furnace bucket Weighing system purging process, comprises the following steps:
S1, load that batch can, batch can are all pressed at raw material, lower close valve open before, batch can is in the process of blowing in blast furnace, open the first valve of FlexbleJoint blowing mechanism and the second valve of lower clack box blowing mechanism, nitrogen enters the inner chamber of FlexbleJoint and lower cavity between clack box and material flow gate respectively by the first pipeline and second pipe, the pressure of the nitrogen passed in two pipelines is higher than blast furnace top pressure, during system works, the first manual trip valve and the second manual trip valve are in opened condition;
S2, when the nitrogen pressure that the first pressure warning unit detects in the first pipeline exceedes set(ting)value, close the first valve, first pressure release valve opens pressure release automatically, and report to the police, when the nitrogen pressure that the second pressure warning unit detects in second pipe exceedes set(ting)value, close the second valve, the second pressure release valve opens pressure release automatically, and reports to the police;
S3, other times, close the first valve and the second valve, stops passing into nitrogen.
Should be understood that; for those of ordinary skills; can be improved according to the above description or be converted; such as the position increasing some elements, change passes into the perforate of FlexbleJoint, the erection sequence etc. of change components and parts on pipeline, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (7)
1. a blast furnace bucket Weighing system blow device, described Weighing system comprises: comprise batch can, material flow gate, 3 LOAD CELLS and lower clack box, the approach cone of described material flow gate is connected with the bottom of batch can, the entirety that described batch can and material flow gate are formed is seated in described 3 LOAD CELLS, described lower clack box is arranged on outside material flow gate, and and be provided with cavity between material flow gate, the outer setting of the approach cone of described material flow gate has FlexbleJoint, the bottom of the approach cone of described material flow gate is provided with the grey ring of resistance, annular gap is provided with between the upper cover plate of the grey ring of described resistance and lower clack box, the inner chamber of described FlexbleJoint with by this annular gap and described cavity connects, it is characterized in that, described blow device comprises FlexbleJoint blowing mechanism and lower clack box blowing mechanism,
Described FlexbleJoint blowing mechanism comprises the first pipeline, is successively set on the first manual trip valve, the first valve, the first pressure warning unit, the first check valve and the first pressure release valve on described first pipeline from outside to inside, the outer end of described first pipeline is connected with source nitrogen, described the inner of first pipeline is connected with the inner chamber of FlexbleJoint, and the outlet of described first pressure release valve is communicated with air;
Described lower clack box blowing mechanism comprises second pipe, is successively set on the second manual trip valve, the second valve, the second pressure warning unit, the second check valve and the second pressure release valve on described second pipe from outside to inside, the outer end of described second pipe is connected with source nitrogen, the inner of described second pipe is connected with described cavity, and the outlet of described second pressure release valve is communicated with air.
2. device according to claim 1, is characterized in that, the inner of described first pipeline is divided into multiple arm, and all arms are connected with the inner chamber of FlexbleJoint.
3. device according to claim 1, is characterized in that, described first valve is variable valve, trip valve or adjustment trip valve.
4. device according to claim 1, is characterized in that, described first pipeline is provided with restrictor, and described restrictor is valve or restriction orifice.
5. device according to claim 1, is characterized in that, the inner of described second pipe is divided into multiple arm, and all arms are connected with described cavity.
6. device according to claim 1, is characterized in that, described second valve is variable valve, trip valve or adjustment trip valve.
7. the purging process utilizing the device described in claim 1 to carry out, is characterized in that, comprise the following steps:
S1, load that batch can, batch can are all pressed at raw material, lower close valve open before, batch can is in the process of blowing in blast furnace, open the first valve of FlexbleJoint blowing mechanism and the second valve of lower clack box blowing mechanism, nitrogen enters the inner chamber of FlexbleJoint and lower cavity between clack box and material flow gate respectively by the first pipeline and second pipe, the pressure of the nitrogen passed in two pipelines is higher than blast furnace top pressure, during system works, the first manual trip valve and the second manual trip valve are in opened condition;
S2, when the nitrogen pressure that the first pressure warning unit detects in the first pipeline exceedes set(ting)value, close the first valve, first pressure release valve is opened automatically, and report to the police, when the nitrogen pressure that the second pressure warning unit detects in second pipe exceedes set(ting)value, close the second valve, the second pressure release valve is opened automatically, and reports to the police;
S3, other times, close the first valve and the second valve, stops passing into nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875495.7A CN105368999B (en) | 2015-12-02 | 2015-12-02 | Blast furnace bucket Weighing system blow device and technique |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510875495.7A CN105368999B (en) | 2015-12-02 | 2015-12-02 | Blast furnace bucket Weighing system blow device and technique |
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| CN105368999A true CN105368999A (en) | 2016-03-02 |
| CN105368999B CN105368999B (en) | 2017-10-24 |
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| CN201510875495.7A Active CN105368999B (en) | 2015-12-02 | 2015-12-02 | Blast furnace bucket Weighing system blow device and technique |
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| CN (1) | CN105368999B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011338A (en) * | 2016-06-22 | 2016-10-12 | 首钢京唐钢铁联合有限责任公司 | Method for blowing material tank at top of blast furnace |
| CN110527767A (en) * | 2019-08-14 | 2019-12-03 | 宝钢湛江钢铁有限公司 | A kind of dustproof construction for furnace top material tank for blast furnace |
| CN114134274A (en) * | 2021-11-30 | 2022-03-04 | 北京首钢股份有限公司 | Dust removal device for blast furnace regulating valve and application method thereof |
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| CN104357610A (en) * | 2014-10-26 | 2015-02-18 | 北京首钢自动化信息技术有限公司 | System and method for monitoring state of charging bucket of blast furnace |
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2015
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| JPS56169712A (en) * | 1980-06-03 | 1981-12-26 | Kobe Steel Ltd | Equalization of pressure of uniform-pressure chamber at top of blast furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106011338A (en) * | 2016-06-22 | 2016-10-12 | 首钢京唐钢铁联合有限责任公司 | Method for blowing material tank at top of blast furnace |
| CN106011338B (en) * | 2016-06-22 | 2018-06-22 | 首钢京唐钢铁联合有限责任公司 | A kind of method for purging furnace top material tank for blast furnace |
| CN110527767A (en) * | 2019-08-14 | 2019-12-03 | 宝钢湛江钢铁有限公司 | A kind of dustproof construction for furnace top material tank for blast furnace |
| CN114134274A (en) * | 2021-11-30 | 2022-03-04 | 北京首钢股份有限公司 | Dust removal device for blast furnace regulating valve and application method thereof |
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| CN105368999B (en) | 2017-10-24 |
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Effective date of registration: 20180322 Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan Co-patentee after: WUHAN GANGSHI IRONMAKING BUILT INSTALLATION CO., LTD. Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Co-patentee before: WUHAN GANGSHI IRONMAKING BUILT INSTALLATION CO., LTD. Patentee before: Wuhan Iron & Steel (Group) Corp. |
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