CN1315220A - Dry-dust collector for blast furnace - Google Patents
Dry-dust collector for blast furnace Download PDFInfo
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- CN1315220A CN1315220A CN 00122696 CN00122696A CN1315220A CN 1315220 A CN1315220 A CN 1315220A CN 00122696 CN00122696 CN 00122696 CN 00122696 A CN00122696 A CN 00122696A CN 1315220 A CN1315220 A CN 1315220A
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- gas
- blast furnace
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- coal
- dust
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- Filtering Of Dispersed Particles In Gases (AREA)
- Blast Furnaces (AREA)
Abstract
A crude gas feeding duct 26 for guiding a blast furnace exhaust gas is connected with the bottom part of a crude gas chamber 27 and a plurality of bag chambers 28 arranged so as to be communicated with the crude gas chamber 27 are arranged on a circular locus where the crude gas chamber 28 is positioned at the center and clean gas exhausting ducts 29 for exhausting clean gas are provided so as to be respectively connected with the bottom part of each of the bag chambers 28 and by a turbulent flow generated by a condition where the direction of gravity acting on dust particles and the gas flow direction are opposite each other and the flow paths are suddenly expanded, gas flow rate and dust concentration of each bag chamber 28 are uniformed.
Description
The control of dust technology that the present invention relates to dry-dust collector for blast furnace and in the way of blast furnace gas being introduced blast furnace furnace roof pressure-discharging gas recovering device, remove the coal dust in the blast furnace gas.
In the past, known furnace roof pressure-discharging gas turbine formula power generation assembly as the blast furnace furnace roof pressure-discharging gas recovering device ground that is used to reclaim the blast furnace gas contained energy.Carrying in the way of blast furnace gas, be provided with the dry-dust collector for blast furnace of removing the coal dust in the blast furnace gas, to improve power generation capacity to furnace roof pressure-discharging gas power generation turbine.
As shown in Figure 4, in dry-dust collector for blast furnace 1, the blast furnace gas that emits from the blast furnace furnace roof flows into raw gas chamber 3 by raw gas supply line 2 after through the gravitational precipitator (not shown), after coming out from raw gas chamber 3, coal gas flows into respectively again in the cylindric cloth bag chamber.In each cloth bag chamber 4, the purification coal gas of being removed coal dust by cloth envelop collector flows into next system by discharging gas line 5, in case after the coal dust that will collect concentrates in the hopper, transport these coal ash by coal dust discharge equipment 7 in each cloth bag chamber.In the way of raw gas supply line 2, the maintenance of having packed into is with dustproof valve 8, because dustproof valve 8 is very heavy, so it is bearing on the support 9.
In the leading portion of furnace roof pressure-discharging gas power generation turbine dry-dust collector for blast furnace is set so that improve power generation capacity, such technology is newer technology, and it can't use in old-fashioned blast-furnace equipment.When in old-fashioned blast-furnace equipment, being provided with furnace roof pressure-discharging gas power generation turbine and dry-dust collector for blast furnace, exist problems such as being difficult to guarantee device installing space and maintenance access space.
Therefore, people make every effort to make the device densification and reduce installing space.Making a compacter important factor of device is exactly the pipeline configuration structure.For example, as shown in Figure 4, supplying under the situation of blast furnace gases from the top raw gas chamber 3 of dry-dust collector for blast furnace 1 of giving, raw gas supply line 2 must be crossed over cloth bag chamber 4 and be arranged on the high position, the support 9 that people require to support heavy dustproof valve 8 and raw gas supply line 2 has wind resistance and antiseismic etc. high-strength structure, and when thermal expansion was maximum, the structure of support 9 and weight all increased, and the support installing space also increases.
The objective of the invention is provides a kind of dry-dust collector for blast furnace that can simplify the required attendant equipment of pipeline and can seek the device densification for addressing the above problem.
For solving above-mentioned problem, dry-dust collector for blast furnace of the present invention is so design, promptly carry the supply line of blast furnace gas to link to each other with the bottom of raw gas chamber, and a plurality of cloth bags chamber that is provided with communicatively with the raw gas chamber is according to being that the circular track in center is provided with the raw gas chamber, and is provided with and each bottom, cloth bag chamber conjointly the purification coal gas discharge tube of emission purification coal gas and the coal dust discharge equipment of the discharging coal dust that removes.
By said structure, the blast furnace gas flow upstream ground of sending into by the gas supply pipeline flows in the raw gas chamber.At this moment, the gravity direction that acts on coal dust in the blast furnace gas is opposite with air flow line, because runner sharply enlarges during from gas supply pipeline flow-direction raw gas chamber at coal gas, so at the indoor turbulent flow that formed of raw gas.Therefore, the coal dust in blast furnace gas and the waste gas is disperseed and is evenly flowed to each cloth bag chamber, makes the air quantity of each cloth bag chamber and coal dust concentration (load) obtain homogenizing.As a result, need not consider air quantity and coal dust concentration (load) difference and must cloth bag chamber design is too much, therefore can reduce cloth bag chamber volume and make whole device compacter.
To the below that the gas supply pipeline of coal gas is discharged in the supply of cloth bag chamber and the discharging gas line of emission purification coal gas all is set at the cloth bag chamber from the cloth bag chamber, thus one, can reduce each pipeline of supporting and be contained in the support of pipeline valvegear midway etc., therefore wind resistance and antiseismic etc. intensity and thermal expansion amount can be set to such an extent that lessly seek miniaturization and lightness.When being arranged on the lower position, can be also used as their support of supporting to gas supply pipeline and coal gas discharge tube by a support.
Fig. 1 is the blast furnace gas processing flow chart of the embodiment of the invention.
Fig. 2 is the mode chart of the dry-dust collector for blast furnace of the same embodiment of expression.
Fig. 3 is the mode chart of the dry-dust collector for blast furnace of expression other embodiments of the invention.
Fig. 4 is the mode chart of the traditional dry-dust collector for blast furnace of expression.
Embodiment
Embodiments of the invention below are described with reference to the accompanying drawings.In Fig. 1, the flare system 12 of handling blast furnace gas links to each other with the furnace roof of blast furnace 11.From upstream side, gravitational precipitator 13, high furnace temperature formula particle collector (scrubber in the venturi) 14, diaphragm valve 15 are set in flare system 12 according to priority.
In the front of blast furnace wet dust collection device 14, from flare system 12, branched out furnace roof pressure-discharging gas recovery system 16, it is at the downstream side and flare system 12 interflow of diaphragm valve 15.From upstream side, in furnace roof pressure-discharging gas recovery system 16, be provided with dry-dust collector for blast furnace 17 and furnace roof pressure-discharging gas power generation turbine (comprising power generation assembly) 18 according to priority.In the pipeline in the upstream side of dry-dust collector for blast furnace 17 and downstream side, be provided with maintenance respectively with dustproof valve 19a, 19b and valve 20a, 20b, in the pipeline in the upstream side of furnace roof pressure-discharging gas power generation turbine 18 and downstream side, valve 21,22 is set respectively.
Between flare system 12 and furnace roof pressure-discharging gas recovery system 16, maintenance bypass 23 is set.Bypass 23 is to come out in upstream side branch from flare system 12 of diaphragm valve 15, when under the upstream side of valve 21 and situation that furnace roof pressure-discharging gas recovery system 16 links to each other, from upstream side, valve 24 and dustproof valve 25 is set in bypass 23.
As shown in Figure 2, when the raw gas supply line 26 that will be the pipeline of furnace roof pressure-discharging gas recovery system 16 was connected the bottom of raw gas chamber 27, blast furnace wet dust collection device 14 was according to being that the central circular track is provided with many cloth bag chambers 28 that are provided with communicatively with raw gas chamber 27 with raw gas chamber 27.
Coal dust in the blast furnace gas is removed by being arranged on inner cloth envelop collector in each cloth bag chamber 28, the purification coal gas discharge tube 29 of emission purification coal gas with the discharging coal dust that removes dust discharge hopper 30 link to each other with the bottom of each cloth bag chamber 28, and coal dust discharge equipment 31 be arranged on hopper 30 below.
Raw gas supply line 26 and dustproof valve 19a, purification coal gas discharge tube 29 and dustproof valve 19b are by same support 32 supportings.
Below, the effect of said structure is described.Under the situation of carrying out dry-running, dustproof valve 19a, 19b and valve 20a, the 20b, 21,22 of furnace roof pressure-discharging gas recovery system 16 open, and the valve 24 of bypass 23, dustproof valve 25 and diaphragm valve 15 are closed.Under this state, the blast furnace gas that produces in blast furnace is introduced into the gravitational precipitator 13 from furnace roof by coal gas treatment system 12, and will purify in the coal gas introducing furnace roof pressure-discharging gas recovery system 16.
In furnace roof pressure-discharging gas recovery system 16, purify coal gas and be introduced in the dry-dust collector for blast furnace 17, treated purification coal gas is introduced in the furnace roof pressure-discharging gas power generation turbine so that generating, and the blast furnace gas contained energy is recovered as electric power.
In dry-dust collector for blast furnace 17, the processing coal gas of gravitational precipitator 13 flows in the raw gas chamber 27 by raw gas supply line 26, and described coal gas flows into respectively from raw gas chamber 27 and is arranged in the cylindric cloth bag chamber 28 of circular trace.
At this moment, it is opposite with air flow line to act on the gravity direction of handling the coal dust in the coal gas, owing to runner sharply enlarges when gas supply pipeline 26 flows to raw gas chamber 27 at coal gas, so formed turbulent flow in raw gas chamber 27.Therefore, the coal dust in blast furnace gas and the waste gas is uniformly dispersed flows to each cloth bag chamber 28, makes the air quantity of each cloth bag chamber 28 and coal dust concentration (load) even.
Therefore as a result, needn't consider the difference of air quantity and coal dust concentration (load) and cloth bag chamber 28 is provided with too much, can reduce the cloth bag chamber vol and make whole device densification.
Remove the system of purification coal gas below 29 inflows of purification coal gas discharge tube of coal dust in each cloth bag chamber 28 with cloth envelop collector, in a single day the coal dust that is collected in each cloth bag 28 is just sent by coal dust discharge equipment 31 after being collected in the hopper 30.
Carry raw gas supply line 26 that discharges coal gas and the purification coal gas discharge tube 29 that is used for 28 emission purification coal gas all to be arranged on the below of cloth bag chamber 28 to cloth bag chamber 28 from the cloth bag chamber, in this case, can reduce each pipeline 28,29 of supporting and be contained in midway heavy dustproof valve 19a of each pipeline 28,29, the support 32 of 19b.Therefore, can realize the miniaturization and the lightness of support 32 by designing wind resistance and antiseismic etc. intensity and thermal expansion amount lower, under the situation that raw gas supply line 26 and purification coal gas discharge tube 29 are arranged on the lower position, a support 32 just can be used for supporting raw gas supply line 26 and purify coal gas discharge tube 29.
In addition, gravitational precipitator 13 is than blast furnace wet dust collection device 14 height, compare with the situation that as in the past, from gravitational precipitator 13, branches out raw gas supply line 26, because raw gas supply line 26 comes out in the place ahead of blast furnace wet dust collection device 14 branch from discharging coal gas treatment system 12, so raw gas supply line 26 is the shortest and height lateral can be set lowlyer, when can simplifying the duct arrangement structure, can prevent that coal dust is piled up between gravitational precipitator 13 and the blast furnace wet dust collection device 14.
In the occasion of carrying out the wet type running, in the dustproof valve 19a, the 19b that close furnace roof pressure-discharging gas recovery system 16 and valve 20a, 20b, open valve 21,22.Under this state, the blast furnace discharging coal gas that produces in blast furnace 11 enters gravitational precipitator 13 and blast furnace wet dust collection device 14 by discharging coal gas treatment system 12 from furnace roof, and it purifies coal gas and enters furnace roof pressure-discharging gas recovery system 16 by bypass 23.In furnace roof pressure-discharging gas recovery system 16, purify coal gas and be introduced into generating in the furnace roof pressure-discharging gas power generation turbine 18, blast furnace discharging coal gas contained energy reclaims as electric power.
Under the situation that the running of dry-dust collector for blast furnace 17 and furnace roof pressure-discharging gas power generation turbine 18 stops, in dustproof valve 19a, the 19b of furnace roof pressure-discharging gas recovery system 16 and valve 20a, 20b, 21,22 pent whiles, the valve 24 and the dustproof valve 25 of bypass 23 are opened, and diaphragm valve 15 is closed.Under this state, the blast furnace discharging coal gas that produces in blast furnace 11 enters gravitational precipitator 13 and blast furnace wet dust collection device 14 by discharging coal gas treatment system 12 from furnace roof, and it purifies coal gas and then supplies with next system by diaphragm valve 15.
Fig. 3 is the view of expression other embodiments of the invention, in Fig. 3, is provided with blowdown tank 33 on the bottom of each cloth bag chamber 28, and collected coal dust becomes the gas shape and is admitted to next system in blowdown tank.
According to such structure, the height of dry-dust collector for blast furnace 17 can be lower than height shown in Figure 2.
According to aforesaid the present invention, blast furnace discharging coal gas upwards fluidly flows in the raw gas chamber, the coal dust particulate gravity direction that acts in the blast furnace discharging coal gas is opposite with air flow line, because of sharply enlarging during from gas supply pipeline flow-direction raw gas chamber at coal gas, runner cause coal gas at the raw gas indoor turbulence, the air quantity of each cloth bag chamber of arranging by circular trace and coal dust concentration (load) are disperseed and are obtained homogenizing, therefore needn't consider that air quantity and coal dust concentration difference strange land are too much with the design of cloth bag chamber, can make whole device compact more owing to reduced the volume of cloth bag chamber.In addition, gas supply pipeline and coal gas discharge tube all are arranged on the below of cloth bag chamber, therefore the support that supports each pipeline and be contained in each pipeline valvegear midway etc. has reduced, wind resistance and antiseismic etc. intensity and thermal expansion amount can be set less in, support can be also used as the support of each pipeline of supporting and valvegear, therefore can realize the miniaturization of support and lightness and can reduce device and lay the space because of having simplified the duct arrangement structure.
Claims (1)
1. dry-dust collector for blast furnace, it is characterized in that, carry the gas supply pipeline of blast furnace gas to link to each other with bottom, raw gas chamber, the a plurality of cloth bags chamber that is provided with communicatively with the raw gas chamber is the setting of central circular track with the raw gas chamber, and is provided with and each bottom, cloth bag chamber conjointly the coal gas discharge tube of emission purification coal gas and the coal dust discharge equipment of the discharging coal dust that removes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000089996A JP2001276536A (en) | 2000-03-29 | 2000-03-29 | Dry dust collecting apparatus for blast furnace |
| JP89996/2000 | 2000-03-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1315220A true CN1315220A (en) | 2001-10-03 |
| CN1114704C CN1114704C (en) | 2003-07-16 |
Family
ID=18605670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00122696 Expired - Fee Related CN1114704C (en) | 2000-03-29 | 2000-08-16 | Dry-dust collector for blast furnace |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2001276536A (en) |
| CN (1) | CN1114704C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429579B (en) * | 2007-11-06 | 2012-02-08 | 新日铁工程技术株式会社 | Purification method and apparatus for blast furnace gas |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004321970A (en) * | 2003-04-25 | 2004-11-18 | Shin Etsu Chem Co Ltd | Exhaust gas treatment method and treatment apparatus |
| CN102218230A (en) * | 2011-03-18 | 2011-10-19 | 江苏恒顺达生物能源有限公司 | Washing flow tank convenient for ester and saponin separation |
| CN102218228A (en) * | 2011-04-29 | 2011-10-19 | 安徽普朗膜技术有限公司 | Dewatering preparation method for high-purity organic matters |
| CN102210953A (en) * | 2011-05-06 | 2011-10-12 | 江南大学 | Solid-liquid separation method of citric acid fermentation liquid |
| CN102218248B (en) * | 2011-06-30 | 2013-04-17 | 首钢总公司 | Coal gas dust collector |
| CN110317911B (en) * | 2019-06-21 | 2021-03-26 | 新兴铸管股份有限公司 | Method for quickly introducing coal gas after blast furnace overhaul and mid-term delivery |
-
2000
- 2000-03-29 JP JP2000089996A patent/JP2001276536A/en active Pending
- 2000-08-16 CN CN 00122696 patent/CN1114704C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101429579B (en) * | 2007-11-06 | 2012-02-08 | 新日铁工程技术株式会社 | Purification method and apparatus for blast furnace gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001276536A (en) | 2001-10-09 |
| CN1114704C (en) | 2003-07-16 |
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