CN1007178B - Apparatus for energy recovery from furnace waste gas - Google Patents
Apparatus for energy recovery from furnace waste gasInfo
- Publication number
- CN1007178B CN1007178B CN87104993A CN87104993A CN1007178B CN 1007178 B CN1007178 B CN 1007178B CN 87104993 A CN87104993 A CN 87104993A CN 87104993 A CN87104993 A CN 87104993A CN 1007178 B CN1007178 B CN 1007178B
- Authority
- CN
- China
- Prior art keywords
- waste gas
- gas
- furnace
- pipe
- turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 239000002912 waste gas Substances 0.000 title claims description 45
- 239000007789 gas Substances 0.000 claims abstract description 58
- 239000003500 flue dust Substances 0.000 claims description 21
- 239000008187 granular material Substances 0.000 claims description 14
- 239000004071 soot Substances 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 abstract description 19
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 238000010926 purge Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000001816 cooling Methods 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000009183 running Effects 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/22—Arrangements of heat-exchange apparatus
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
A dust remover and a pressure recovery turbine downstream of it are used in a blast-furnace gas pipe for energy recovery from blast furnace gases of a shaft furnace. A bypass pipeline runs parallel to the pipeline with the dust remover and the turbine. A wet scrubber located in the bypass pipeline contains a flow control valve. Blast-furnace gases generated during airblasting after the furnace has been damped down, and additional emissions of blast-furnace gas in case of purging, are passed through the bypass pipe. Due to this arrangement, various units, including the dust remover, can be constructed more compactly, and condensation of moisture in a filter of the dust remover can be prevented effectively.
Description
The present invention relates to the equipment of recovered energy from furnace waste gas, particularly relate to a kind of like this apparatus for energy recovery, its first pipe-line system is from the furnace waste gas outlet port, by a coarse granule flue dust collecting device, a dry-type soot cleaner, a shutoff valve and a dry type roof pressure recovery gas turbine are connected to a gas purifier; Its second pipe-line system is connected with gas purifier with the dry-type soot cleaner.
In general shaft furnace energy-recuperation system, all there is the device of uperize and/or water to be arranged near the waste gas outlet on top.Injection apparatus mixes steam and/or water in the exhaust flow in air-supply stage behind the checking, with near the furnace wall the waste gas outlet of protection top.An exhaust gas cooling device is arranged on coarse granule flue dust collecting device, and it can be blown into the flue dust collecting device to cooling water.A sack cleaner is used as dry collector.A reduction valve is housed in second pipe-line system.
When the operating energy recovery plant, mix the waste gas of steam into and/or water just along with the air-supply of stove enters in coarse granule flue dust collecting device and the dust settling pocket by injection apparatus, stop valve is closed subsequently, and adjust second reduction valve on the pipe-line system make its reach required degree with control stove roof pressure.When stove after air-supply during proper functioning, stop valve is opened, waste gas is just sent into dry type roof pressure recovery gas turbine by coarse granule flue dust collecting device and dust settling pocket.Then deliver to gas purifier from the waste gas that turbine comes out.
If blown through (Blow through), the exhaust gas temperature of coming out in the stove is then higher, and its volume ratio is big by about 20% when running well.When this abnormal conditions is detected, then exhaust gas cooling device will spray into cooling water in the waste gas so that its cooling.
According to above-mentioned prior art device, then in planning and design energy recovery plant stage, when calculating the Processing capacity of coarse granule flue dust collecting device, exhaust gas cooling device and dust settling pocket, consider because of blowing through the gas volume that makes waste gas in the stove has increased by 20% factor.This size that apparatus for energy recovery has been described is bigger.
By caused another difficulty of prior art device be: the air-supply stage behind checking, owing to injection apparatus mixes steam and/or water waste gas humidity is increased, the moisture content that increases generally can condense in dust settling pocket, therefore can stop up dust settling pocket or shorten its working life.
The purpose of this invention is to provide the less apparatus for energy recovery from furnace waste gas of size, and the air-supply stage behind the stove checking can be exempted dew in dust settling pocket, so dust settling pocket just not conference blocked or reduction of service life.
For reaching this purpose, apparatus for energy recovery from furnace waste gas proposed by the invention has comprised first pipe-line system, promptly, receive in the gas purifier by a coarse granule flue dust collecting device, a dry-type soot cleaner, a shutoff valve and a dry type roof pressure recovery gas turbine from the furnace waste gas outlet; Second pipe-line system is connected with gas purifier with the dry-type soot cleaner; Also comprised one can be at a certain amount of waste gas of air-supply phase process behind the stove checking, and the bypass duct of handling waste gas increment when blowing through.Above-mentioned bypass duct is connecting above-mentioned waste gas outlet and above-mentioned gas purifier, and the deduster of a band flow control valve also is housed between them.
According to such arrangement, in the air-supply stage behind checking, the waste gas that comes out in the stove just will pass through bypass duct owing to closed stop valve, so waste gas just handled by deduster, and the while furnace pressure is adjusted by the flow control valve of deduster.The gas of handling is so just delivered in the gas purifier and is gone.After the past air-supply stage behind the checking, stop valve is opened, flow control valve cuts out, this recovery plant enters normal operation subsequently, at this moment the waste gas that comes out in the stove just by coarse granule flue dust collecting device and dry-type soot cleaner, is delivered in the gas purifier by dry type roof pressure recovery gas turbine then again and is gone.If blow through, just opening, the flow control valve of deduster make increment waste gas by bypass duct, handle gas by deduster, and then deliver in the gas purifier and go.
Therefore, during this equipment operation, the air-supply stage behind checking is though the steam and/or the water that mix in the furnace gas make waste gas have higher levels of humidity, but still not needing to use the dry-type soot cleaner, this has just exempted the obstruction of sack cleaner and the possibility of reduction of service life.This is the defect that is easy in flue dust is removed.In addition, if when blowing through, exhaust gas flow is higher than the flow when running well, and does not at this moment also make waste gas flow into the possibility of coarse granule flue dust collecting device and dry-type soot cleaner.Therefore, when blowing through, have under the situation of exhaust gas flow increase, also need not to consider the respective capabilities of coarse granule flue dust collecting device, exhaust gas cooling device and dry-type soot cleaner.Correspondingly, this three's size can be done quite for a short time.
This sketch is a square diagram, and it has embodied a kind of form of apparatus for energy recovery from furnace waste gas of the present invention.
Details are as follows with reference to sketch for one embodiment of the present of invention: label 1 is a shaft furnace with steam and/or water jet device 2.The air-supply stage behind checking is with steam and/or mix in the waste gas in the stove with near the furnace wall the protection furnace roof waste gas outlet.Stove exit flue gas leading 4 is connected in the top of stove 1 in its starting point.The starting point of pipe 4 is equipped with pressure cell 3A and is used for checking top pressure, also has thermosensitive element 3B to be used for checking gas temperature.Label 5 is a coarse granule flue dust collecting device, and flue gas leading 4 promptly is connected on its front end.This trap also has an exhaust gas cooling device 9, and it comprises a water tank 6, a water pump 7 and a water spout 8.This cooling unit 9 is like this designs, is raised to certain altitude when thermosensitive element 3B checks out temperature, and device 9 just sprays in the waste gas of cold water in the coarse granule flue dust collecting device 5.Because the sensible heat of cold water and make waste gas be cooled to the temperature of appointment from the latent heat that cold water produces steam.Label 10 be dust settling pocket as dry-type soot cleaner usefulness, the flue gas leading 11 of flue dust collecting device 5 promptly is connected in this, simultaneously flue dust collecting device 5 flue dust of failing to remove is removed herein.Dust settling pocket flue gas leading 13 is connected to dry type roof pressure recovery gas turbine 12 from dust settling pocket 10, and drives generator 14 runnings by turbine 12, and first stop valve 15, emergency trip valve 16 and a pressure controlled valve 17 are housed in the middle of the dust settling pocket flue gas leading 13.Label 18 is a gas purifier, and turbine exhaust gas pipe 19 promptly is connected to here from turbine 12.The effect of purifier is exactly to remove in the waste gas contained as hydrogen cloride etc. by cleaning toxic gas.Gas purifier 18 also can be reduced to the level that its delivery channel can sustain to exhaust gas temperature.The 3rd stop valve 20 is housed on the turbine exhaust gas pipe 19.As the turbine by-pass pipe 21 of second pipeline, be connected the outlet end of second stop valve 20 on the entrance point of first stop valve 15 on the dust settling pocket flue gas leading 13 and the turbine exhaust gas pipe 19.A membrane valve 22 is housed on the turbine by-pass pipe 21 to be used as reduction valve.In gas purifier 18 through purified waste gas by having the gas holder conduit 24 of water-sealing valve 23, be sent to gas holder 25.
Exhaust gas bypass pipe 31 is the arms that branched away by stove exhaust piping 4, and its quilt is received on the turbine exhaust gas pipe 19 of the centre of the outlet side of import one side of gas purifier 18 and turbine by-pass pipe 21.Coarse grained venturi scrubber 32 in the water flush away waste gas is housed on the by-pass pipe 31.A throttle valve 33 is housed on the venturi scrubber 32.In the air-supply stage behind checking, roof pressure is controlled by the opening degree of throttle valve.Also can when blowing through, control the exhaust gas flow that increases.Diagram 33a is the controller of throttle valve 33.
The drive manner of this equipment is described as follows: the air-supply stage behind checking, air-supply is checked out by pressure cell 3A, pressure controlled valve 17 and membrane valve 22 enter full-shut position respectively simultaneously, after the roof pressure that the throttle valve 33 of venturi scrubber 32 then is used for regulating stove 1 mixes waste gas by injection apparatus 2 with steam and/or water, waste gas is just delivered in the venturi scrubber 32 by the flue gas leading 4 and the exhaust gas bypass pipe 31 at stove exit place, in venturi scrubber 32, flue dust in the waste gas is washed off with atomized water spray.Deliver to gas purifier 18 from the waste gas that deduster 32 comes out by turbine exhaust gas pipe 19, enter holding vessel 25 then.
The air-supply process proceeds to that steam that injection apparatus 2 sprays and/or water reduce greatly or when stopping, pressure controlled valve 17 is just opened gradually, and simultaneously, throttle valve 33 cuts out.At this moment, waste gas is transported in coarse granule flue dust collecting device 5, dust settling pocket 10 and the roof pressure recovery gas turbine 12, so this equipment enters normal operation again.In equipment operation, membrane valve 22 and pressure controlled valve 17 are adjusted with the control roof pressure.
When blowing through, the waste gas output quantity increases by 20%, and its temperature also is increased to and is bordering on 600 to 800 ℃.When thermosensitive element 3B is checked through the rise of temperature, the air throttle 33 of venturi scrubber 32 is just opened, and the gas of increase just is sent to venturi scrubber 32 places by exhaust gas bypass pipe 31 and goes to handle.The gas of handling is sent in the gas purifier 18, and remaining waste gas is then cooled off by the spraying of the cooling water that exhaust gas cooling device 9 provided in coarse granule flue dust collecting device 5, is sent in the roof pressure recovery gas turbine 12 by dust settling pocket 10 then and goes.So, be sent to the exhausted air quantity of cooling unit 9 and dust settling pocket 10, there is no when running well different.This is explanation just, compares with adopting legacy equipment, and the waste gas load will reduce greatly.
Claims (1)
1, a kind of apparatus for energy recovery from furnace waste gas, comprise from the furnace waste gas outlet by a coarse granule flue dust collecting device, a dry-type soot cleaner, stop valve and dry type roof pressure recovery gas turbine are to first pipe-line system of gas purifier, and second pipe-line system that connects flue dust cleaner and gas purifier, it is characterized in that an air-supply stage behind the stove checking can handle waste gas output, and the by-pass pipe of when blowing through, handling the output of increase waste gas, above-mentioned by-pass pipe connects above-mentioned waste gas outlet and above-mentioned gas purifier, and in the middle of them, a deduster being housed, above-mentioned deduster comprises a flow control valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP248192/86 | 1986-10-17 | ||
| JP61248192A JPH0645811B2 (en) | 1986-10-17 | 1986-10-17 | Energy recovery equipment for blast furnace exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87104993A CN87104993A (en) | 1988-04-27 |
| CN1007178B true CN1007178B (en) | 1990-03-14 |
Family
ID=17174572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87104993A Expired CN1007178B (en) | 1986-10-17 | 1987-07-21 | Apparatus for energy recovery from furnace waste gas |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0645811B2 (en) |
| CN (1) | CN1007178B (en) |
| DE (1) | DE3715188A1 (en) |
| IT (1) | IT1206282B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455968C (en) * | 2007-07-13 | 2009-01-28 | 缪建通 | Shaft kiln heat recovery method and device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2068779B1 (en) * | 1993-01-25 | 1998-01-16 | Mannesmann Ag | PROCEDURE FOR THE USE OF THE ENERGY CONTAINED IN THE DRINKING GAS OF A CUBA OVEN. |
| DE4313662C2 (en) * | 1993-01-25 | 1994-12-22 | Mannesmann Ag | Process for using the energy contained in the shaft furnace blast furnace gas |
| KR100498885B1 (en) * | 2000-06-29 | 2005-07-04 | 주식회사 포스코 | Device for clearing the dust of filter bag |
| AT507525B1 (en) * | 2008-10-23 | 2010-09-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR OPERATING A MELT REDUCTION PROCESS |
| AT509224B1 (en) * | 2010-05-20 | 2011-07-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR CONTROLLING THE TEMPERATURE OF PROCESS GASES FROM PLANTS FOR THE PRODUCTION OF REPRODUCTION FOR THE USE OF A RELAXATION TURBINE |
| EP3159640B1 (en) | 2015-10-20 | 2020-04-01 | Danieli Corus BV | Cleaning furnace gas process and metal production plant |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2355457B1 (en) * | 1973-11-06 | 1974-06-20 | Bischoff Gasreinigung | Waste gas purifier for blast furnaces |
| JPS568082B2 (en) * | 1975-02-15 | 1981-02-21 | ||
| DE2523082B2 (en) * | 1975-05-24 | 1977-09-01 | Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserrückkühlanlagen KG, 4300 Essen | FLOOR GAS CLEANING SYSTEM FOR PRESSURE FURNACE |
| GB2049820B (en) * | 1979-05-18 | 1983-02-16 | Hitachi Shipbuilding Eng Co | Utilising blast furnace gas |
| JPS58728A (en) * | 1981-06-25 | 1983-01-05 | Shimadzu Corp | Diamond color measuring device |
-
1986
- 1986-10-17 JP JP61248192A patent/JPH0645811B2/en not_active Expired - Lifetime
-
1987
- 1987-05-07 DE DE19873715188 patent/DE3715188A1/en active Granted
- 1987-05-12 IT IT8747916A patent/IT1206282B/en active
- 1987-07-21 CN CN87104993A patent/CN1007178B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455968C (en) * | 2007-07-13 | 2009-01-28 | 缪建通 | Shaft kiln heat recovery method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN87104993A (en) | 1988-04-27 |
| DE3715188A1 (en) | 1988-04-28 |
| IT8747916A0 (en) | 1987-05-12 |
| DE3715188C2 (en) | 1989-05-18 |
| IT1206282B (en) | 1989-04-14 |
| JPS63103009A (en) | 1988-05-07 |
| JPH0645811B2 (en) | 1994-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |