CN104561413A - Blast furnace top airtight box sealing device - Google Patents
Blast furnace top airtight box sealing device Download PDFInfo
- Publication number
- CN104561413A CN104561413A CN201410832484.6A CN201410832484A CN104561413A CN 104561413 A CN104561413 A CN 104561413A CN 201410832484 A CN201410832484 A CN 201410832484A CN 104561413 A CN104561413 A CN 104561413A
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- China
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- water
- blast furnace
- shaped
- syphon trap
- airtight box
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
Abstract
The invention discloses a blast furnace top airtight box sealing device which comprises an airtight box shell and a rotating sleeve, wherein the airtight box shell is mounted at the top of a blast furnace; a circle of ring-shaped baffle is arranged on the bottom plate of the airtight box shell around a discharge hole; the ring-shaped baffle and the airtight box shell form a ring-shaped water channel; water is contained in the ring-shaped water channel; the lower end of the rotating sleeve is exactly inserted downwards into the ring-shaped water channel and immersed in the water in the ring-shaped water channel; an overflow opening is formed in the side plate of the airtight box shell above the water in the ring-shaped water channel; the overflow opening is communicated with the water inlet pipe section of an upright U-shaped water sealing pipe; the water outlet pipe section of the U-shaped water sealing pipe is communicated with a drain pipe; the water column in the water outlet pipe section of the U-shaped water sealing pipe is higher than the water column in the water inlet pipe section so as to ensure that the pressure difference between the water column in the water outlet pipe section and the water column in the water inlet pipe section of the U-shaped water sealing pipe is greater than the sum of the pressure at the top of the blast furnace and the negative-pressure draft generated during the drainage of the drain pipe all the time. The blast furnace top airtight box sealing device has the advantages of being good in sealing property and low in enterprise cost.
Description
Technical field
The present invention relates to blast furnace top air-tight box tightness system.
Background technology
Airtight box is the core component of blast furnace roof material distributing equipment, is mainly used in driving and controls distributor chute around the rotation of blast furnace medullary ray with fascinate, thus completing blast furnace material distribution.The structure of airtight box is: comprise the airtight box housing being installed on blast furnace roof, airtight box housing is by base plate, top board and side plate composition, airtight box is communicated with blast furnace hole by the discharge port offered on its base plate, airtight box is communicated with batch can by the opening for feed offered on its top board, in airtight box housing, movable sealing is provided with the turnbarrel for installing distributor chute, the upper end of turnbarrel is flexibly connected with airtight box housing seal, the upper port of turnbarrel is facing to the opening for feed on the top board of airtight box housing, the lower port of turnbarrel is facing to the discharge port on the base plate of airtight box housing, cavity is formed between turnbarrel and airtight box housing, be provided with in the cavities and rotate for controlling turnbarrel, and the drive element that control distributor chute fascinates.Due to all can gap be left between the base plate of airtight box housing and turnbarrel, in order to prevent raw gas in blast furnace (primarily of carbon monoxide, carbonic acid gas, the composition such as methane and dust) enter the cavity of airtight box from gap and the drive element damaged cavity, usual employing gas proof way, that is: in the cavity of airtight box, nitrogen is filled with, make pressure in the cavity of airtight box a little more than blast furnace top pressure (i.e. the pressure of blast furnace raw gas), thus reach the object of the cavity of sealing airtight box, but the shortcoming of the gas proof way of this airtight box is: the highest blast furnace top pressure that can only bear 115Kpa, not only sealing effectiveness is poor, raw gas can not be effectively stoped to enter the cavity of airtight box, and the consumption of nitrogen is larger, enterprise's production and application cost is high, and the nitrogen passed in airtight box enters blast furnace can make blast furnace gas calorific value reduce and affect the efficiency of blast furnace.
Summary of the invention
The object of this invention is to provide the blast furnace top air-tight box tightness system that a kind of stopping property is high.
For achieving the above object, present invention employs following technical scheme: described blast furnace top air-tight box tightness system, comprise: the airtight box housing being installed on blast furnace roof, and the turnbarrel be installed in airtight box housing, the base plate of airtight box housing is provided with a circle ring baffle around discharge port, ring baffle and airtight box housing form annular water tank, water is loaded with in annular water tank, correct under turnbarrel and insert annular water tank downwards, and be immersed in the water in annular water tank, the side plate of the airtight box housing in annular water tank above water offers overflow port, overflow port is connected with the water inlet segment of the U-shaped syphon trap uprightly arranged, the water outlet pipeline section of U-shaped syphon trap is connected with water shoot, water column in the water outlet pipeline section of U-shaped syphon trap is higher than the water column in water inlet segment, the negative pressure draft sum that pressure difference value in the water outlet pipeline section guaranteeing U-shaped syphon trap in water column and water inlet segment between water column produces when being greater than blast furnace top pressure and water shoot draining all the time.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: the below of water shoot is provided with collection funnel, the water outlet of water shoot aims at the import of collection funnel downwards, the rising pipe that the outlet connection of collection funnel is connected with sluice.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: the ratio range of the height of the height between the exporting at the bottom of the pipe of U-shaped syphon trap of water shoot and the water outlet pipeline section of U-shaped syphon trap is 0.85-0.95.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: the ratio of the height of the height between the exporting at the bottom of the pipe of U-shaped syphon trap of water shoot and the water outlet pipeline section of U-shaped syphon trap is 0.9.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: the ratio range of the height of the water outlet pipeline section of U-shaped syphon trap and the height at the bottom of airtight box Housing Base to U-shaped syphon trap pipe is 0.7-0.8.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: the ratio of the height of the water outlet pipeline section of U-shaped syphon trap and the height at the bottom of airtight box Housing Base to U-shaped syphon trap pipe is 0.75.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: at the bottom of the pipe of U-shaped syphon trap, offer sewage draining exit, U-shaped syphon trap is connected by the import of sewage draining exit with the first blow-off line being provided with the first gate valve.
Further, aforesaid blast furnace top air-tight box tightness system, wherein: the below of U-shaped syphon trap is provided with dirt storage box, dirt storage box is connected with the outlet of the first blow-off line, and the bottom of dirt storage box is connected with the second blow-off line being provided with the second gate valve.
By the enforcement of technique scheme, the invention has the beneficial effects as follows: not only good airproof performance, enterprise's production and application cost is low, and water seal can be made to bear higher furnace top pressure, even if furnace top pressure rises to 130Kpa also can not puncture water seal.
Accompanying drawing explanation
Fig. 1 is the structural representation of blast furnace top air-tight box tightness system of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, described blast furnace top air-tight box tightness system, comprise: the airtight box housing 2 being installed on blast furnace 1 furnace roof, and the turnbarrel 3 be installed in airtight box housing 2, the base plate of airtight box housing 2 is provided with a circle ring baffle 4 around discharge port, ring baffle 4 and airtight box housing form annular water tank, water 5 is loaded with in annular water tank, turnbarrel corrects for 3 times and inserts annular water tank downwards, and be immersed in the water 5 in annular water tank, the side plate of the airtight box housing 2 in annular water tank above water 5 offers overflow port, overflow port is connected with the water inlet segment 6 of the U-shaped syphon trap uprightly arranged, the water outlet pipeline section 7 of U-shaped syphon trap is connected with water shoot 8, water column in the water outlet pipeline section 7 of U-shaped syphon trap is higher than the water column in water inlet segment, pressure difference value △ P in the water outlet pipeline section 7 guaranteeing U-shaped syphon trap in water column and water inlet segment 6 between water column
postall the time blast furnace top pressure P is greater than
topwith the negative pressure draft P produced during water shoot draining
take outsum, in the present embodiment, the below of water shoot 8 is provided with collection funnel 9, the water outlet of water shoot 8 aims at the import of collection funnel 9 downwards, the rising pipe 10 that the outlet connection of collection funnel 9 is connected with sluice, in the present embodiment, the ratio range of the height b of the height a between the exporting at the bottom of the pipe of U-shaped syphon trap of water shoot 8 and the water outlet pipeline section of U-shaped syphon trap is 0.85-0.95, can guarantee that the outlet of water shoot 8 is positioned at a high position like this, thus the negative pressure draft P produced when reducing water shoot 8 draining
take out, thus improve the sealing effectiveness of water seal, in the present embodiment, the ratio of the height b of the height a between the exporting at the bottom of the pipe of U-shaped syphon trap of water shoot 8 and the water outlet pipeline section of U-shaped syphon trap is 0.9, the outlet height design of this water shoot 8, reduces enterprise's production and application cost better, and improves the sealing effectiveness of water seal, in the present embodiment, the ratio range of the height b of the water outlet pipeline section 7 of U-shaped syphon trap and the height c at the bottom of airtight box housing 2 base plate to U-shaped syphon trap pipe is 0.7-0.8, the pressure difference value △ P in the water outlet pipeline section 7 that can improve U-shaped syphon trap like this in water column and water inlet segment 6 between water column
post, and then the blast furnace top pressure that raising water seal can be born, improve the sealing effectiveness of water seal, in the present embodiment, the ratio of the height b of the water outlet pipeline section 7 of U-shaped syphon trap and the height c at the bottom of airtight box housing 2 base plate to U-shaped syphon trap pipe is 0.75, the height design of the water outlet pipeline section 7 of this U-shaped syphon trap, the blast furnace top pressure that water seal can be born can be improved better, further increase the sealing effectiveness of water seal, in the present embodiment, sewage draining exit is offered at the bottom of the pipe of U-shaped syphon trap, U-shaped syphon trap is connected by the import of sewage draining exit with the first blow-off line 12 being provided with the first gate valve 11, on at the bottom of the pipe of U-shaped syphon trap after depositing contaminants, the first gate valve 11 can be opened, the impurity of deposition at the bottom of U-shaped syphon trap pipe is discharged through the first blow-off line 12, avoids because Impurity deposition too much blocks U-shaped syphon trap, in the present embodiment, the below of U-shaped syphon trap is provided with dirt storage box 13, dirt storage box 13 is connected with the outlet of the first blow-off line 12, the bottom of dirt storage box 13 is connected with the second blow-off line 15 being provided with the second gate valve 14, online blowdown can be realized when not affecting U-shaped syphon trap internal pressure like this, substantially increasing production efficiency,
Principle of work of the present invention is as follows:
First open the first gate valve 11 on the first blow-off line 12, close the second gate valve 14 on the second blow-off line 15 simultaneously, then in the annular water tank in airtight box housing 2, water 5 is injected, make the lower end of water 5 energy submergence turnbarrel 3, thus formation water seal, water seal is by the cavity that formed between turnbarrel 3 and airtight box housing 1 and the isolated sealing of blast furnace 1, then continue to inject water 5, make water 5 flow into U-shaped syphon trap through overflow port, stop injecting after water inlet segment 6 and the water outlet pipeline section 7 of U-shaped syphon trap are full of water, then blast furnace 1 is started working, the waste gas produced in blast furnace 1 working process can stop by water seal and can not enter in the cavity in airtight box, the furnace top pressure produced in blast furnace 1 working process can act on U-shaped syphon trap, discharged through water shoot 8 by part water in U-shaped syphon trap, water shoot 8 draining to produce negative pressure draft P
take out, the water of discharging through water shoot 13 can enter sluice through collection funnel 9 and rising pipe 10, due to the pressure difference value △ P in water column in the water outlet pipeline section 7 of U-shaped syphon trap in blast furnace working process and water inlet segment 6 between water column
postall the time blast furnace top pressure P is greater than
topwith the negative pressure draft P produced during water shoot draining
take outsum, and then guarantee that water seal can not be breakdown, when current are through U-shaped syphon trap, impurity in water can be deposited in dirt storage box 13, after the Impurity deposition in dirt storage box 13 to certainweight, first close the first gate valve 11, open the second gate valve 14 again, and then the impurity in dirt storage box 13 is discharged through the second blow-off pipe 15, when the impurity in dirt storage box 13 is got rid of totally, first close the second gate valve 14, open the first gate valve 11 again, owing to carrying out the blowdown of dirt storage box 13 after closing the first gate valve 11 again, so can not impact the hydraulic pressure in U-shaped syphon trap the blowdown process of impurity in dirt storage box 13, thus namely achieve online blowdown, turn avoid impurities in water and be deposited on the situation generation blocking U-shaped syphon trap at the bottom of U-shaped syphon trap pipe, advantage of the present invention is: good airproof performance, enterprise's production and application cost is low, and the anti-pressure ability of water seal is strong, water seal can bear the blast furnace top pressure of 130Kpa, output is promoted to 1620 tons by former average daily production 1534 tons, year volume increase=(1620t/d-1534t/d) * 365d=31390 ton, because ton iron generated energy increases by 2 degree of electricity, bring benefits in year=2 degree of electricity/ton iron * 1620t/d*365d=118.26 ten thousand yuan, and according to affecting the factor of coke ratio in " Blast Furnace Iron-making Production Technology handbook ", often improve furnace top pressure 10KPa, the coke ratio of 0.3-0.5% can be reduced, according to former average daily production 1534 tons, integrated fuel can be calculated than for 542kg/t, coke can be used less: 542kg/t*0.3%*1620t/d*365d=961 ton, according to coke average price 1600 yuan/ton calculating, 1600 yuan/ton * 961 tons=153.76 ten thousand yuan can be saved year, in sum, after adopting this airtight box tightness system, 31390 tons can be increased production year, year synergy 272.02 ten thousand yuan.
Claims (8)
1. blast furnace top air-tight box tightness system, comprise: the airtight box housing being installed on blast furnace roof, and the turnbarrel be installed in airtight box housing, it is characterized in that: on the base plate of airtight box housing, discharge port is provided with a circle ring baffle, ring baffle and airtight box housing form annular water tank, water is loaded with in annular water tank, correct under turnbarrel and insert annular water tank downwards, and be immersed in the water in annular water tank, the side plate of the airtight box housing in annular water tank above water offers overflow port, overflow port is connected with the water inlet segment of the U-shaped syphon trap uprightly arranged, the water outlet pipeline section of U-shaped syphon trap is connected with water shoot, water column in the water outlet pipeline section of U-shaped syphon trap is higher than the water column in water inlet segment, the negative pressure draft sum that pressure difference value in the water outlet pipeline section guaranteeing U-shaped syphon trap in water column and water inlet segment between water column produces when being greater than blast furnace top pressure and water shoot draining all the time.
2. blast furnace top air-tight box tightness system according to claim 1, it is characterized in that: the below of water shoot is provided with collection funnel, the water outlet of water shoot aims at the import of collection funnel downwards, the rising pipe that the outlet connection of collection funnel is connected with sluice.
3. blast furnace top air-tight box tightness system according to claim 1, is characterized in that: the ratio range of the height of the height between the exporting at the bottom of the pipe of U-shaped syphon trap of water shoot and the water outlet pipeline section of U-shaped syphon trap is 0.85-0.95.
4. blast furnace top air-tight box tightness system according to claim 3, is characterized in that: the ratio of the height of the height between the exporting at the bottom of the pipe of U-shaped syphon trap of water shoot and the water outlet pipeline section of U-shaped syphon trap is 0.9.
5. blast furnace top air-tight box tightness system according to claim 1, is characterized in that: the ratio range of the height of the water outlet pipeline section of U-shaped syphon trap and the height at the bottom of airtight box Housing Base to U-shaped syphon trap pipe is 0.7-0.8.
6. blast furnace top air-tight box tightness system according to claim 5, is characterized in that: the ratio of the height of the water outlet pipeline section of U-shaped syphon trap and the height at the bottom of airtight box Housing Base to U-shaped syphon trap pipe is 0.75.
7. blast furnace top air-tight box tightness system according to claim 1, is characterized in that: at the bottom of the pipe of U-shaped syphon trap, offer sewage draining exit, and U-shaped syphon trap is connected by the import of sewage draining exit with the first blow-off line being provided with the first gate valve.
8. blast furnace top air-tight box tightness system according to claim 7, it is characterized in that: the below of U-shaped syphon trap is provided with dirt storage box, dirt storage box is connected with the outlet of the first blow-off line, and the bottom of dirt storage box is connected with the second blow-off line being provided with the second gate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832484.6A CN104561413A (en) | 2014-12-29 | 2014-12-29 | Blast furnace top airtight box sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410832484.6A CN104561413A (en) | 2014-12-29 | 2014-12-29 | Blast furnace top airtight box sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN104561413A true CN104561413A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410832484.6A Pending CN104561413A (en) | 2014-12-29 | 2014-12-29 | Blast furnace top airtight box sealing device |
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| CN (1) | CN104561413A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821168A (en) * | 2016-05-13 | 2016-08-03 | 中冶华天南京工程技术有限公司 | Cooling sealing system |
| CN113911580A (en) * | 2021-10-19 | 2022-01-11 | 唐山三友化工股份有限公司 | Anti-crystallization water sealing device applied to ammonia-containing medium storage barrel and medium recovery method |
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| CN1036410A (en) * | 1988-04-01 | 1989-10-18 | 北京科技大学 | The water-cooled water-sealed method and apparatus of blast-furnace distributor |
| JPH06100914A (en) * | 1992-09-22 | 1994-04-12 | Kawasaki Steel Corp | Device for equalizing pressure of seal gas in machine chamber for driving distributing chute in blast furnace |
| CN201793591U (en) * | 2010-07-31 | 2011-04-13 | 黑龙江建龙钢铁有限公司 | Online recovering device for water seal of blast furnace airtight box |
| WO2011110027A1 (en) * | 2010-03-10 | 2011-09-15 | 北京科技大学 | Water-cooling and water-sealing transmission case for bell-less blast furnace top |
| CN204455152U (en) * | 2014-12-29 | 2015-07-08 | 江苏永钢集团有限公司 | Blast furnace top air-tight box tightness system |
-
2014
- 2014-12-29 CN CN201410832484.6A patent/CN104561413A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1036410A (en) * | 1988-04-01 | 1989-10-18 | 北京科技大学 | The water-cooled water-sealed method and apparatus of blast-furnace distributor |
| JPH06100914A (en) * | 1992-09-22 | 1994-04-12 | Kawasaki Steel Corp | Device for equalizing pressure of seal gas in machine chamber for driving distributing chute in blast furnace |
| WO2011110027A1 (en) * | 2010-03-10 | 2011-09-15 | 北京科技大学 | Water-cooling and water-sealing transmission case for bell-less blast furnace top |
| CN201793591U (en) * | 2010-07-31 | 2011-04-13 | 黑龙江建龙钢铁有限公司 | Online recovering device for water seal of blast furnace airtight box |
| CN204455152U (en) * | 2014-12-29 | 2015-07-08 | 江苏永钢集团有限公司 | Blast furnace top air-tight box tightness system |
Non-Patent Citations (1)
| Title |
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| 李朝金 等: "中小型高炉可采用水冷水封型无料钟设备", 《钢铁》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821168A (en) * | 2016-05-13 | 2016-08-03 | 中冶华天南京工程技术有限公司 | Cooling sealing system |
| CN105821168B (en) * | 2016-05-13 | 2018-07-20 | 中冶华天南京工程技术有限公司 | Cooling seal system |
| CN113911580A (en) * | 2021-10-19 | 2022-01-11 | 唐山三友化工股份有限公司 | Anti-crystallization water sealing device applied to ammonia-containing medium storage barrel and medium recovery method |
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Application publication date: 20150429 |