CN106636507A - Blast furnace gas dry method bag type dust removing mechanical type pressure dust unloading process and device thereof - Google Patents
Blast furnace gas dry method bag type dust removing mechanical type pressure dust unloading process and device thereof Download PDFInfo
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- CN106636507A CN106636507A CN201610758412.0A CN201610758412A CN106636507A CN 106636507 A CN106636507 A CN 106636507A CN 201610758412 A CN201610758412 A CN 201610758412A CN 106636507 A CN106636507 A CN 106636507A
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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
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
Disclosed is a blast furnace gas dry method bag type dust removing mechanical type pressure dust unloading process and device. A first gas pressure relief valve is arranged on a dust and gas chamber located on the lower portion of each cloth bag dust removing box body. Each first gas pressure relief valve of the corresponding cloth bag dust removing box body is connected to a concentration dust bin through a first gas pressure relief pipe, so that dust and gas with pressure in the concentration dust bin enter the dust and gas chambers located on the lower portions of the cloth bag dust removing box bodies through the first gas pressure relief valves. A second gas pressure relief valve is arranged on a gas purifying chamber located on the upper portion of each cloth bag dust removing box body. Each second gas pressure relief valve of the corresponding cloth bag dust removing box body is connected to a low pressure purified gas main pipe through a second gas pressure relief pipe, so that gas in gas purifying chambers located on the upper portions of the cloth bag dust removing box bodies enters the low pressure purified gas main pipe through the second gas pressure relief valves. Cloth bag dust removing box body dust unloading is conducted by utilizing gas pressure energy of a dust removing system. The blast furnace gas dry method bag type dust removing mechanical type pressure dust unloading process and device have the advantages that the mechanical dust unloading and conveying process is adopted and meanwhile pneumatic dust unloading and conveying are utilized, and the pneumatic dust unloading and conveying process is adopted and meanwhile mechanical power dust unloading and conveying are utilized.
Description
Technical field
The present invention relates in metallurgy high furnace gas dry method pocket type dedusting technology field, more particularly to a kind of blast furnace gas dry
Bag-type dusting machinery formula pressure unloads grey technique and its device.
Background technology
The purification process technique widely used dry-method bag-type dedusting of the raw coke oven gas that existing blast furnace process production process is produced
Technology, presses《Blast furnace gas dry bag-type dusting design specification》（GB50505-2009）The unloading of middle dedusting ash, defeated grey technique can be adopted
With two methods of Pneumatic ash conveying or mechanical ash conveying, technically have the following disadvantages in practical application：
1st, unloaded using machinery, defeated grey technique：Casing ash silo collection ash is discharged by gravity and bulkhead mode of vibration, unloads grey speed relative
It is relatively slow, it is less efficient；The casing for carrying out unloading ash manipulation filters coal gas state in interim deactivation, and it is long to unload the ash manipulation time, casing
Filtration production run rate reduce, so as to have influence on system casing cloth bag load increase, unload between each casing ash manipulation switch when cloth
Frequently, cloth bag service life is reduced bag load variations.
2nd, unloaded using strength, defeated grey technique：Unload, defeated ash manipulation requirement will reach to conveying the pressure of gas, flow velocity, gas-solid ratio
Have high demands to strict design parameter, and supporting detection and automaticity, cost of investment is higher；Operating process needs to aid in gas
Source, technique consumes gas flow greatly, and energy resource consumption is high；In practical operation, because the ash discharge of single casing is individual interval and of short duration
Process, ash discharge early stage and the later stage unavoidably there is gas-solid ratio and do not reach Reasonable Parameters, valve, channel bend etc. can be caused
The problem of equipment attrition, or cause the problem of the positions such as ash-transmission system horizontal pipe and elbow blocking.
The content of the invention
It is an object of the invention to provide it is a kind of using machine power while unloaded using system gas pressure, it is defeated
Ash, unload for pressure, the coal gas of defeated ash filtered by coal gas relief tube and removing dust casing after recovery；Machine power is unloaded, defeated ash
In the case of the flow velocity of conveying material, gas-solid ratio adjustable range width, equipment attrition or line clogging are solved；Pressure is unloaded, defeated ash
By the use of system pressure coal gas as conveying material source of the gas, plus the blast furnace gas dry bag-type dusting machinery formula pressure of quick-release ash speed
Unload grey technique and its device.
The solution of the present invention is such：
A kind of blast furnace gas dry bag-type dusting machinery formula pressure unloads grey technique, including step：
（1）, the construction defeated ash gas release recovery system step of pressure：First is arranged in each bag-type dust lower box dust and gas room
Coal gas pressure-relief valve, the corresponding first coal gas pressure-relief valve of each bag-type dust casing is connected to concentration ash by the first coal gas relief tube
Storehouse so that concentrate the dust coal gas with pressure in ash silo to enter each bag-type dust lower box dirt by the first coal gas pressure-relief valve
Air chamber；On each bag-type dust casing top, air-purifying chamber arranges the second coal gas pressure-relief valve, each bag-type dust casing corresponding the
Two coal gas pressure-relief valves are connected to low pressure purified gas house steward by the second coal gas relief tube so that each net gas in bag-type dust casing top
Indoor filtered purified gas enters low pressure purified gas house steward by the second coal gas pressure-relief valve；
（2）, unload grey strategy：Operated by following sequential steps：
1）, system had two and the above bag-type dust casing system, at least in two bag-type dust casings when unloading ash
Carry out, one of them as the defeated grey coal gas of pressure recovery, the bag-type dust casing this time period do not unload ash while also exiting
The main coal gas of blast fumance is filtered, and controlling bag-type dust casing inner high voltage coal gas, to be recovered to low pressure by the second coal gas pressure-relief valve net
Gas main so that the bag-type dust casing completes release；Other bag-type dust casing carries out unloading ash one by one, carries out unloading ash
Bag-type dust casing is unloading ash while also maintaining the main coal gas of blast fumance to filter；
2）, open unload ash the unloading valve of bag-type dust lower box first, in casing dedusting ash system gas pressure and itself
Middle ash silo is entered under Action of Gravity Field；
3）, open and have been loaded with middle the ash silo bottom unloading valve of dedusting ash, dedusting ash passes through to bury under the effect of system gas pressure
The airtight cavity of extending plate conveyer is delivered to concentration ash silo；
4）, open completed release bag-type dust casing the first coal gas pressure-relief valve, concentrate ash silo in the dust coal with pressure
Gas enters the bag-type dust lower box dust and gas room by the first coal gas relief tube, net after dust coal gas removing dust Bag filter
Coal gas enters low pressure purified gas house steward by bag-type dust casing top air-purifying chamber and the second coal gas relief tube.
More specifically technical scheme also includes：Also include coal gas purge step：In step 3）Afterwards, cloth bag casing dedusting ash
When material-level measure is zero, the unloading valve stopping casing of bottom first for closing the bag-type dust casing unloads ash, and opening buries rubbing board conveying
Drive end unit nitrogen purge valve carries out coal gas purging.
Further：The step 1）In, stop what the coal gas dust removal in a bag-type dust casing blast fumance was filtered
Method is：The first gas stop valve and the second gas stop valve are closed, stops the coal in the blast fumance of the bag-type dust casing
Gas dust removal and filtration.
Further：The step 2）In, it is to keep having stable gas pressure in the bag-type dust casing for need to unload ash, should
First gas stop valve and the second gas stop valve of bag-type dust casing is that two valves are in open mode, while two valves
Door can maintain the main coal gas dust removal in blast fumance to filter in open mode.
A kind of application blast furnace gas dry bag-type dusting machinery formula pressure unloads the device of grey technique, including several cloth bags are removed
Dirt casing, the bottom dust and gas room of each bag-type dust casing is connected with the first gas stop valve, and the first gas stop valve is connected to
Raw coke oven gas pipe, the top air-purifying chamber of each bag-type dust casing is connected with the second gas stop valve, the connection of the second gas stop valve
To high pressure purified gas house steward, the bottom of each bag-type dust casing is connected to middle ash silo top by the first unloading valve, middle
The bottom of ash silo is connected to the charging aperture for burying extending plate conveyer by the second unloading valve, and the discharging opening for burying extending plate conveyer is connected to
The top of ash silo is concentrated, the bottom for concentrating ash silo is provided with the 3rd unloading valve, each bag-type dust lower box dust and gas room is arranged
First coal gas pressure-relief valve, the first coal gas pressure-relief valve is connected to concentration ash silo by the first coal gas relief tube；Each bag-type dust
Casing top air-purifying chamber arranges the second coal gas pressure-relief valve, and the corresponding second coal gas pressure-relief valve of each bag-type dust casing passes through second
Coal gas relief tube is connected to low pressure purified gas house steward.
More specifically technical scheme also includes：The first coal gas relief tube is manifold structure, by dividing on the house steward
Pipe is coupled with each first coal gas pressure-relief valve.
Further：The second coal gas relief tube is manifold structure, passes through to be in charge of on the house steward to be coupled with each
Second coal gas pressure-relief valve.
Further：The described tail for burying extending plate conveyer is provided with nitrogen sparge tube, is provided with nitrogen sparge tube
The nitrogen purge valve of control gas break-make.
Further：The described extending plate conveyer that buries has closed casing, and pressure-bearing scope is 0～0.3MPa.
It is an advantage of the invention that：
1st, unloaded using machinery, defeated grey technique simultaneously profit strength unload, defeated ash：Casing ash silo collection ash vibrates by gravity and bulkhead
Also discharge under gas pressure effect simultaneously, material actual internal area is big, and unit can be kept in the case where material flow is low
The unloading ash capacity of time is big, efficiency high；The casing for carrying out unloading ash manipulation is in filtering coal gas state, only keeps a casing to use
Conveying coal gas is recovered by filtration in release, operating process system casing cloth bag load spacer change frequency is few, equipment life reliability；
2nd, unloaded using strength, defeated grey technique simultaneously profit machine power unload, defeated ash：Unload, defeated ash manipulation process is using production system
System pressure coal gas, the parameter such as pressure, flow velocity, gas-solid ratio to conveying gas is not required to be strict with, it is not necessary to aid in source of the gas, invests
And operating cost is relatively low；In the case where flow channel cross-sections product is big, though Flow of Goods and Materials speed is less than Pneumatic ash conveying technique, but still
Can guarantee that and efficiently unload grey speed, the abrasion of the equipment such as valve, pipeline is few, and the position such as ash-transmission system horizontal pipe and elbow will not
There is blockage problem.
Description of the drawings
Fig. 1 is that the dedusting ash mechanical compression of the present invention unloads grey technique and its schematic device.
Reference is in figure：1st, bag-type dust casing, 2, dust-removal cloth-bag, the 3, first coal gas pressure-relief valve, the 4, first coal gas
Relief tube, the 5, first unloading valve, 6, middle ash silo, the 7, second unloading valve, 8, connecting pipe, 9, concentrate ash silo, the 10, the 3rd unloads
Grey valve, 11, Humidifying ash discharging machine, the 12, second coal gas pressure-relief valve, the 13, second coal gas relief tube, the 14, second gas stop valve, 15,
First gas stop valve, 16, high pressure purified gas house steward, 17, raw coke oven gas pipe, 18, coal gas pressure regulation valve group, 19, low pressure purified gas it is total
Pipe, 20, electricity generation with gas waste pressure system, 21, dedusting ash, 22, nitrogen purge valve, 23, nitrogen sparge tube, 24, bury rubbing board conveying
Machine.
Specific embodiment
The blast furnace gas dry bag-type dusting machinery formula pressure of the present invention unloads grey technique, including step：
（1）, the construction defeated ash gas release recovery system step of pressure：The is arranged in each bottom dust and gas room of bag-type dust casing 1
One coal gas pressure-relief valve 3, the corresponding first coal gas pressure-relief valve 3 of each bag-type dust casing 1 is connected to collection by the first coal gas relief tube 4
Middle ash silo 9 so that concentrate the dust coal gas with pressure in ash silo 9 to enter each bag-type dust case by the first coal gas pressure-relief valve 3
The bottom dust and gas room of body 1；In each top air-purifying chamber of bag-type dust casing 1, the second coal gas pressure-relief valve 12, each bag-type dust are set
The corresponding second coal gas pressure-relief valve 12 of casing 1 is connected to low pressure purified gas house steward 19 by the second coal gas relief tube 13 so that each
Filtered purified gas enters low pressure purified gas house steward by the second coal gas pressure-relief valve 12 in the top air-purifying chamber of bag-type dust casing 1
19；
（2）, unload grey strategy：Operated by following sequential steps：
1）, system had two and the above bag-type dust casing 1 system, at least in two bag-type dust casings when unloading ash
1 is carried out, one of them as the defeated grey coal gas of pressure recovery, the bag-type dust casing 1 this time period do not unload ash while also moving back
Go out the main coal gas of blast fumance to filter, and control the inner high voltage coal gas of bag-type dust casing 1 and be recovered to by the second coal gas pressure-relief valve 12
Low pressure purified gas house steward 19 so that the bag-type dust casing 1 completes release；Other bag-type dust casing 1 carries out unloading ash one by one,
Carry out unloading the bag-type dust casing of ash（1）Ash is being unloaded while also maintaining the main coal gas of blast fumance to filter；
2）, open the first unloading valve of bottom 5 of bag-type dust casing 1 for unloading ash, in casing dedusting ash 21 in system gas pressure and
Middle ash silo 6 is entered under self gravitation effect,；
3）, open and have been loaded with the bottom unloading valve 7 of middle ash silo 6 of dedusting ash 21, dedusting ash 21 is in the case where system gas pressure is acted on
Concentration ash silo 9 is delivered to by burying the airtight cavity of extending plate conveyer 24；
4）, open completed release bag-type dust casing 1 the first coal gas pressure-relief valve 3, concentrate ash silo 9 in the dust with pressure
Coal gas enters the bottom dust and gas room of bag-type dust casing 1 by the first coal gas relief tube 4, and dust coal gas removing dust cloth bag 2 is filtered
Purified gas afterwards enters low pressure purified gas house steward 19 by the top air-purifying chamber of bag-type dust casing 1 and the second coal gas relief tube 13.
Also include coal gas purge step：In step 3）Afterwards, when cloth bag casing dedusting ash material-level measure is zero, the cloth is closed
First unloading valve of bottom 5 of bag dust-removing box 1 stops casing and unloads ash, and opening is buried the afterbody nitrogen purge valve 22 of extending plate conveyer 24 and entered
Row coal gas is purged.
The step 1）In, stopping the method for the filtration of the main coal gas dust removal in a blast fumance of bag-type dust casing 1 is：
Close the first gas stop valve 15 and the second gas stop valve 14.
The step 2）In, it is to keep having stable gas pressure in the bag-type dust casing 1 for need to unload ash, the cloth bag is removed
First gas stop valve 15 and the second gas stop valve 14 of dirt casing 1 is that two valves are in open mode, while two valves
The main coal gas dust removal that door can be continued in blast fumance in open mode is filtered.
Unloading grey technique to the blast furnace gas dry bag-type dusting machinery formula pressure of the present invention with system shown in Figure 1 is carried out in detail
It is described as follows：
In the present invention quantity of bag-type dust casing regard production it needs to be determined that, system shown in Figure 1 is using four bag-type dust casees
One embodiment of body composition, it is assumed that after four bag-type dust casings carry out dedusting operation simultaneously, first, the right cloth bag is removed
When dirt casing 1 need to carry out mechanical pressure and unload ash manipulation, stop the main coal gas in the blast fumance of first left bag-type dust casing 1
Dust removal and filtration, the method for stopping is the first gas stop valve 15 and the second gas stop valve 14 for closing the bag-type dust casing 1；
Keep having stable gas pressure in the first bag-type dust casing 1 in the right, the method for holding is the of the bag-type dust casing 1
14 two valves of one gas stop valve 15 and the second gas stop valve are in open mode, reach using top gas pressure
Can carry out unloading the purpose of ash, dust-removing box keeps carrying out coal gas filtration simultaneously and dedusting ash unloads the operating mode of ash, is conducive to stability series
The main Gas Production of dust-removal cloth-bag filters power load distributing in system.
The second coal gas pressure-relief valve 12 of first left bag-type dust casing 1 is opened, is controlled high in the bag-type dust casing 1
Pressure coal gas is recovered to low pressure purified gas house steward 19 by the second coal gas pressure-relief valve 12 so that the bag-type dust casing 1 completes to unload
Pressure.
First the first unloading valve of bottom 5 of bag-type dust casing 1 in the right is opened, dedusting ash 21 is in system coal gas pressure in casing
Middle ash silo 6 is entered under power and self gravitation effect,.
Unlatching has been loaded with the bottom unloading valve 7 of middle ash silo 6 of dedusting ash, and dedusting ash 21 is in system gas pressure and buries rubbing board
Concentration ash silo 9 is delivered under the mechanical conveying effect of conveyer 24 by burying the airtight cavity of extending plate conveyer 24.
The first coal gas pressure-relief valve 3 of first left bag-type dust casing 1 is opened, the dust with pressure in ash silo 9 is concentrated
Coal gas enters the bottom dust and gas room of bag-type dust casing 1 by the first coal gas relief tube 4, and dust coal gas removing dust cloth bag 2 is filtered
Purified gas afterwards enters low pressure purified gas house steward 19 by the top air-purifying chamber of bag-type dust casing 1 and the second coal gas relief tube 13,
Realize that pressure unloads the recovery of coal gas during ash.
When the dedusting ash material-level measure of first, the right cloth bag casing 1 is zero, the bottom of the bag-type dust casing 1 is closed
One unloading valve 5 stops casing and unloads ash, is restored to main coal gas dust removal operating mode；Opening buries the afterbody nitrogen of extending plate conveyer 24 purging
Valve 22 carries out coal gas purging, completes the one-time mechanical formula pressure of bag-type dust casing 1 and unloads ash manipulation.Mechanical type pressing need to again be carried out
When power unloads ash manipulation, then repeatedly said process.
Close nitrogen purge valve 22 and terminate purging, close the first coal gas pressure-relief valve 3 of first left bag-type dust casing 1
And the second coal gas pressure-relief valve 12, first gas stop valve 15 and the second gas stop valve 14 of the bag-type dust casing 1 are opened, make
Obtain the bag-type dust casing 1 and recover the main coal gas dust removal by filtration operation of blast furnace again.
Remaining bag-type dust casing 1 need to carry out being carried out by above-mentioned strategy when mechanical pressure unloads ash manipulation.
When the quantity for concentrating ash silo 9 to collect reaches setting value, open and concentrate the unloading valve 10 of 9 bottom of ash silo the 3rd, discharge
Dedusting ash 21 is transported outward after the humidification process of Humidifying ash discharging machine 11.
Fig. 1 is also to unload the device of grey technique, including several cloth using blast furnace gas dry bag-type dusting machinery formula pressure
Bag dust-removing box 1, the bottom dust and gas room of each bag-type dust casing 1 is connected with the first gas stop valve 15, the first gas cutting
Valve 15 is connected to raw coke oven gas pipe 17, and the top air-purifying chamber of each bag-type dust casing 1 is connected with the second gas stop valve 14, and second
Gas stop valve 14 is connected to high pressure purified gas house steward 16, and the bottom of each bag-type dust casing 1 passes through the UNICOM of the first unloading valve 5
To the top of middle ash silo 6, the bottom of middle ash silo 6 is connected to the charging aperture for burying extending plate conveyer 24, buries by the second unloading valve 7
The discharging opening of extending plate conveyer 24 is connected to the top for concentrating ash silo 9, and the bottom for concentrating ash silo 9 is provided with the 3rd unloading valve 10,
Each bottom dust and gas room of bag-type dust casing 1 arranges the first coal gas pressure-relief valve 3, and the first coal gas pressure-relief valve 3 passes through the first coal
Gas relief tube 4 is connected to concentration ash silo 9；Each top air-purifying chamber of bag-type dust casing 1 arranges the second coal gas pressure-relief valve 12, each cloth
The corresponding second coal gas pressure-relief valve 12 of bag dust-removing box 1 is connected to low pressure purified gas house steward 19 by the second coal gas relief tube 13.
The first coal gas relief tube 4 is manifold structure, passes through to be in charge of on the house steward to be coupled with each first coal gas
Pressure-relief valve 3；The second coal gas relief tube 13 is manifold structure, passes through to be in charge of on the house steward to be coupled with each second coal gas
Pressure-relief valve 12；
The described tail for burying extending plate conveyer 24 is provided with nitrogen sparge tube 23, and control gas is provided with nitrogen sparge tube 23
The nitrogen purge valve 22 of break-make, when cloth bag casing dedusting ash material-level measure is zero, the bottom first for closing bag-type dust casing 1 is unloaded
Grey valve 5 stops casing and unloads ash, and opening buries the afterbody nitrogen purge valve 22 of extending plate conveyer 24 carries out coal gas purging.
Described buries extending plate conveyer 24 with closed casing, and pressure-bearing scope is 0～0.3MPa.
Claims (9)
1. a kind of blast furnace gas dry bag-type dusting machinery formula pressure unloads grey technique, it is characterised in that：Including step：
（1）, the construction defeated ash gas release recovery system step of pressure：System is at least provided with two bag-type dust casings（1）,
Each bag-type dust casing（1）Bottom dust and gas room arranges the first coal gas pressure-relief valve（3）, each bag-type dust casing（1）It is corresponding
First coal gas pressure-relief valve（3）By the first coal gas relief tube（4）It is connected to concentration ash silo（9）So that concentrate ash silo（9）Interior band pressure
Dust coal gas pass through the first coal gas pressure-relief valve（3）Into each bag-type dust casing (1) bottom dust and gas room；Remove in each cloth bag
Dirt casing（1）Top air-purifying chamber arranges the second coal gas pressure-relief valve（12）, each bag-type dust casing（1）Corresponding second coal gas is unloaded
Pressure valve（12）By the second coal gas relief tube（13）It is connected to low pressure purified gas house steward（19）So that each bag-type dust casing（1）
Filtered purified gas passes through the second coal gas pressure-relief valve in the air-purifying chamber of top（12）Into low pressure purified gas house steward（19）；
（2）, unload grey strategy：Operated by following sequential steps：
1）, system had to the bag-type dust casing of two and the above（1）System, at least in two bag-type dust casees when unloading ash
Body（1）Carry out, one of them as the defeated grey coal gas of pressure recovery, the bag-type dust casing（1）Do not unload grey same in this time period
When also exit the main coal gas of blast fumance and filter, and control bag-type dust casing（1）Inner high voltage coal gas passes through the second coal gas pressure-relief valve
（12）It is recovered to low pressure purified gas house steward（19）So that the bag-type dust casing (1) completes release；Other bag-type dust case
Body（1）Carry out one by one unloading ash, carry out unloading the bag-type dust casing of ash（1）Ash is being unloaded while also maintaining the main coal gas mistake of blast fumance
Filter；
2）, open unload ash the first unloading valve of bag-type dust casing (1) bottom (5), dedusting ash in casing（21）In system coal gas
Middle ash silo (6) is entered under pressure and self gravitation effect,；
3）, open have been loaded with dedusting ash（21）Middle ash silo (6) bottom unloading valve (7), dedusting ash（21）In system coal gas pressure
Concentration ash silo (9) is delivered under power effect by burying the airtight cavity of extending plate conveyer (24)；
4）, open and completed the bag-type dust casing of release（1）The first coal gas pressure-relief valve (3), concentrate band pressure in ash silo (9)
Dust coal gas by the first coal gas relief tube (4) into bag-type dust casing (1) the bottom dust and gas room, dust coal gas Jing is removed
Purified gas after dirt cloth bag (2) is filtered is entered by bag-type dust casing (1) top air-purifying chamber and the second coal gas relief tube (13)
Low pressure purified gas house steward（19）.
2. blast furnace gas dry bag-type dusting machinery formula pressure according to claim 1 unloads grey technique, it is characterised in that：Also
Including coal gas purge step：In step 3）Afterwards, when cloth bag casing dedusting ash material-level measure is zero, the bag-type dust casing is closed
（1）The unloading valve of bottom first (5) stop casing and unload ash, opening buries extending plate conveyer (24) afterbody nitrogen purge valve（22）Carry out
Coal gas is purged.
3. blast furnace gas dry bag-type dusting machinery formula pressure according to claim 1 unloads grey technique, it is characterised in that：Institute
State step 1）In, stopping the method for the filtration of the coal gas dust removal in bag-type dust casing (1) blast fumance is：Close the first coal
Gas stop valve (15) and the second gas stop valve (14), the main coal gas stopped in the blast fumance of the bag-type dust casing (1) is removed
Dirt is filtered.
4. blast furnace gas dry bag-type dusting machinery formula pressure according to claim 1 unloads grey technique, it is characterised in that：Institute
State step 2）In, it is to keep having stable gas pressure in the bag-type dust casing (1) for need to unload ash, the bag-type dust casing（1）
The first gas stop valve（15）It is that two valves are in open mode with the second gas stop valve (14), while at two valves
In open mode the main coal gas dust removal in blast fumance can be maintained to filter.
5. a kind of application blast furnace gas dry bag-type dusting machinery formula pressure unloads the device of grey technique, including several bag-type dusts
Casing（1）, each bag-type dust casing（1）Bottom dust and gas room be connected with the first gas stop valve（15）, the first gas cutting
Valve（15）It is connected to raw coke oven gas pipe（17）, each bag-type dust casing（1）Top air-purifying chamber be connected with the second gas stop valve
（14）, the second gas stop valve（14）High pressure purified gas house steward (16) is connected to, each bag-type dust casing（1）Bottom pass through
First unloading valve (5) is connected to middle ash silo (6) top, and the bottom of middle ash silo (6) is connected to by the second unloading valve (7) buries
The charging aperture of extending plate conveyer (24), the discharging opening for burying extending plate conveyer (24) is connected to the top for concentrating ash silo (9), concentrates ash
The bottom in storehouse (9) is provided with the 3rd unloading valve (10), it is characterised in that：Each bag-type dust casing（1）Bottom dust and gas room is arranged
First coal gas pressure-relief valve（3）, the first coal gas pressure-relief valve（3）By the first coal gas relief tube（4）It is connected to concentration ash silo（9）；
Each bag-type dust casing（1）Top air-purifying chamber arranges the second coal gas pressure-relief valve（12）, each bag-type dust casing（1）It is corresponding
Second coal gas pressure-relief valve（12）By the second coal gas relief tube（13）It is connected to low pressure purified gas house steward（19）.
6. application blast furnace gas dry bag-type dusting machinery formula pressure according to claim 5 unloads the device of grey technique, its
It is characterised by：The first coal gas relief tube（4）For manifold structure, pass through to be in charge of on the house steward to be coupled with each first coal
Gas pressure-relief valve（3）.
7. application blast furnace gas dry bag-type dusting machinery formula pressure according to claim 5 unloads the device of grey technique, its
It is characterised by：The second coal gas relief tube（13）For manifold structure, on the house steward by be in charge of be coupled with each second
Coal gas pressure-relief valve（12）.
8. application blast furnace gas dry bag-type dusting machinery formula pressure according to claim 5 unloads the device of grey technique, its
It is characterised by：The described tail for burying extending plate conveyer (24) is provided with nitrogen sparge tube（23）, in nitrogen sparge tube（23）Upper peace
Nitrogen purge valve equipped with control gas break-make（22）.
9. the application blast furnace gas dry bag-type dusting machinery formula pressure according to claim 5 or 8 unloads the device of grey technique,
It is characterized in that：Described buries extending plate conveyer (24) with closed casing, and pressure-bearing scope is 0～0.3MPa.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610611479 | 2016-07-30 | ||
| CN2016106114791 | 2016-07-30 |
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| Publication Number | Publication Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513592A (en) * | 2017-08-15 | 2017-12-26 | 广西华锐钢铁工程设计咨询有限责任公司 | Grey technique and device are unloaded in mechanical totally-enclosed with pressure |
| CN108265144A (en) * | 2018-01-19 | 2018-07-10 | 山东钢铁集团日照有限公司 | A kind of defeated grey method of blast furnace gas |
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| CN101708406A (en) * | 2009-12-30 | 2010-05-19 | 中冶南方工程技术有限公司 | Group control method of blast furnace gas cloth bag dust catcher system for pipeline dust conveying |
| CN102925603A (en) * | 2012-11-05 | 2013-02-13 | 柳州钢铁股份有限公司 | Process and device for recycling pressure-equalizing diffusion gas at blast furnace top |
| CN206736289U (en) * | 2016-07-30 | 2017-12-12 | 柳州钢铁股份有限公司 | Blast furnace gas dry bag-type dusting machinery formula pressure ash-discharging device |
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| JPS5743912A (en) * | 1980-08-28 | 1982-03-12 | Sumitomo Metal Ind Ltd | Dry-type dust removing system for blast furnace gas of plural blast furnaces |
| CN2218182Y (en) * | 1995-04-04 | 1996-01-24 | 首钢总公司 | Pneumatic dust discharger by blast furnace residued gas pressure |
| CN101708406A (en) * | 2009-12-30 | 2010-05-19 | 中冶南方工程技术有限公司 | Group control method of blast furnace gas cloth bag dust catcher system for pipeline dust conveying |
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| CN206736289U (en) * | 2016-07-30 | 2017-12-12 | 柳州钢铁股份有限公司 | Blast furnace gas dry bag-type dusting machinery formula pressure ash-discharging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107513592A (en) * | 2017-08-15 | 2017-12-26 | 广西华锐钢铁工程设计咨询有限责任公司 | Grey technique and device are unloaded in mechanical totally-enclosed with pressure |
| CN108265144A (en) * | 2018-01-19 | 2018-07-10 | 山东钢铁集团日照有限公司 | A kind of defeated grey method of blast furnace gas |
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| CN106636507B (en) | 2019-09-10 |
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