CN1065098A - A kind of spray bituminous coal system for blast furnace - Google Patents
A kind of spray bituminous coal system for blast furnace Download PDFInfo
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- CN1065098A CN1065098A CN 92106119 CN92106119A CN1065098A CN 1065098 A CN1065098 A CN 1065098A CN 92106119 CN92106119 CN 92106119 CN 92106119 A CN92106119 A CN 92106119A CN 1065098 A CN1065098 A CN 1065098A
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Abstract
A kind of large blast furnace blowing bituminous coal material novel process also is applicable to other pulverulent material fields of winding-up.The invention solves the safety problem of blowing bituminous coal, adopt three jars of continuous pressure pans of eclipsed form, injecting coal quantity continuous metering system, the coal powder injection of single tube road and metering regulation system and security system, replace foreign patent and domestic multitube road winding-up hard coal system, realized the operation of large blast furnace safety blowing bituminous coal.Present device is simplified, and is easy to operate, and maintenance is few, compares with existing technology and improves winding-up ability 20%, and injecting coal quantity is brought up to 25t/h by 17.4t/h, and invisible waste reduces about 10%, and substitution rate improves more than 0.05, and oxygen concentration is lower than 3% in the pressure pan.
Description
The invention belongs to the technical field of large blast furnace blowing bituminous coal technology, also be applicable to other pulverulent material fields of winding-up.
At present external large blast furnace blowing bituminous coal technology adopts system of U.S. Armco Steel Corp. basically, perhaps uses the Ke Lekena system of Germany.Owing to still continue to use backward multitube road injection system, there is the accumulated powder phenomenon in the domestic large blast furnace coal injection system hard coal of can only jetting at winding-up jar cone position and blanking mouth place; The big cloth bag of collecting coal dust also exists " bowel lavage " and accumulated powder phenomenon; Each coal injection of draught amount is inhomogeneous, no regulating measure, and pulsation phenomenon is serious, influences smooth operation of furnace, reduces the rate of combustion of coal dust; There is the phenomenon that to jet continuously in the receipts powder of can system and the winding-up tank switching process side by side.And the injection system accumulated powder causes involuntary ignition easily, even blast, threatens safety in production; The inert-free gas sfgd. does not have the measure of anti-electrostatic spark yet, therefore is not suitable for blowing bituminous coal.
The present invention has done improvement at above-mentioned deficiency, has developed spray bituminous coal system for blast furnace.
Main points of the present invention are that it is become by four groups of subsystems:
(1) forms three jars of continuous pressure pan groups of eclipsed form by the big bagroom of inner filtration of collecting coal dust, receipts powder jar, storage coal jar, winding-up jar and swing clock valve;
(2) form the injecting coal quantity continuous metering system by weight sensor, metallic bellows (loop expansion pipe) and corresponding circuit devcie, Measuring Precision can reach 0.5%.Continuous metering system comprises " in following jar hard connect continuous measurement " and " bi-bellow pressure balance type " two kinds of metering forms;
(3) by automatic and adjustable coal feeder, long-lived conical distributor, be flexible coupling, air distributor and each operated pneumatic valve, water trap, strainer, coal powder injection house steward, coal jetting branch, spray gun and air port form single tube road coal powder injection metering regulation system;
(4) by nitrogen allocation packet and pipe network, fast and safely trip valve, pressure unit, explosion-proof thermometric galvanic couple, discharging hole, waterproof check fluidisation device, static connection and grounding device and sequence control valve are formed safety system.
Above-mentioned four groups of subsystems become complete spray bituminous coal system for blast furnace.
Enter receipts powder jar at the coal dust that pulverized coal preparation system transports after big cloth bag is received powder, receive and open the clock valve after powder finishes, coal dust leans under normal pressure from reentering storage coal jar, and the clock valve is closed in the pass afterwards.Receive the powder jar and can receive the coal dust that pulverized coal preparation system is sent here once more this moment; If coal dust soon spray in the winding-up jar, then will store the pressurising of coal jar, its pressure stops all to press with after winding-up jar equates, drives down the clock valve, and coal dust is poured the jar of jetting into, and the coal dust in the jar of jetting sprays into blast furnace incessantly; After the coal dust in the storage coal jar is all poured the winding-up jar into, close clock valve down, the pressure release of storage coal jar.Storage coal jar normal pressure carries out next working cycle later on again.Coal dust in the winding-up jar is delivered to long-lived conical distributor through down coal valve, coal feeder, strainer, coal powder injection house steward, after each coal jetting branch, spray gun, the pulverized coal injection process is finished in each air port of spirt blast furnace to divider with the coal dust distributed uniform.Pressure in the winding-up jar is controlled in the scope of process stipulation by fluidisation device, automatic ftercompction device.By the coal dust of the loosening tank skin of fluidisation device, make winding-up jar blanking smoothly, produce local jet through coal feeder, enter the coal powder injection house steward.System dynamic is pressurized air and small amount of nitrogen.
Automatically coal feeding device (having reported utility model, No. 62189, patent) can be realized 0～25t/h injecting coal quantity, and continuous stepless is adjustable.Form Dual-Phrase Distribution of Gas olid by tank pressure, fluidisation device and coal feeder, gas-solid ratio can reach 15kg/m
3More than, flow rate control is about 10m/s in the winding-up pipeline.The present invention improves winding-up ability 20% than the existing technology of same scale, and winding-up reduces about 10% with power consumption.
Divider assignment accuracy height distributes error (each branch injecting coal quantity accounts for the latter's percentage with the difference of average injecting coal quantity) to reach below 3%.The distributer nozzle number can design arbitrarily according to the number of blast-furnace tuyere, and can further realize the adjusting of each tuyere air volume and injecting coal quantity.Use divider and eliminated the pulsation phenomenon of original coal powder injection later on, guaranteed the stable burning of coal dust in the blast-furnace tuyere district, can realize wide spray, many sprays, all sprays.
The big bagroom of inner filtration of the present invention adopts open type natural ventilation rapping, can eliminate coal dust " bowel lavage ", accumulated powder and electrostatic accumulation fully as the anti-electrostatic needle-punched felt filter material that cloth bag is used.Single discharge port winding-up jar has fundamentally been eliminated accumulated powder, has stopped the indivedual blanking mouths of old technology multitube road injection system place accumulated powder and has developed into the involuntary ignition phenomenon.With nitrogen pressurising, fluidisation, can guarantee that oxygen concentration is below 8% in jar group in the pressure pan group.Winding-up can realize jetting the interior oxygen concn of pipeline greater than 16% with pressurized air.Level pressure rupture disk special product is adopted in pressure pan safety relief hole, guarantees the action of overvoltage venting of dust explosion.The winding-up house steward installs fast and safely that trip valve and blast furnace blast, tank pressure, nitrogen are pressed and winding-up realizes chain control with compressed air pressure, has eliminated contingency and accident blast-furnace hot-air refluence phenomenon occurred.The present invention forms security system by these means.
The present invention also has advantages such as simplified equipment, easy to operate, maintenance capacity are few.
Blowing bituminous coal novel process of the present invention from April nineteen ninety for the first time at No. 4, No. 9 two 1000m of Anshan iron and steel plant
3Since the level blast furnace uses, 2 years so far, respond well.Each system is long-term safety ground blowing bituminous coal and contain hard coal at interior various coal dusts t more than totally 11 ten thousand.Operating practice shows that the present invention compares coal powder injection air port rate with existing technology increase by 20%, and substitution rate improves more than 0.05, and injecting coal quantity is brought up to 25t/h by 17.4t/h, and invisible waste reduces about 10%, and oxygen concentration is lower than 3% in the pressure pan.
Accompanying drawing 1 is the spray bituminous coal system for blast furnace synoptic diagram.[1] is the big bagroom of inner filtration among the figure, and [2] for receiving the powder jar, [3] are storage coal jar, [4] be the winding-up jar, [5] are the automatic and adjustable coal feeder, and [6] are swing clock valve, [7] be weight sensor, [8] are metallic bellows (loop expansion pipe), and [9] are the total flowmeter for pipe of coal dust, [10] be long-lived conical distributor, [11] for being flexible coupling, [12] are air compressor machine, and [13] are air distributor, [14] be water trap, [15] be strainer, [16] are the coal powder injection house steward, and [17] are coal jetting branch, [18] be spray gun and air port, [19] be blast furnace ([18] and [19] figure part omitted), [20] are nitrogen compressor, and [21] are nitrogen header pipe and nitrogen allocation packet, [22] be trip valve fast and safely, [23] be pressure unit, [24] are the thermometric galvanic couple, and [25] are explosion venting device, [26] be waterproof check fluidisation device, [27] for static is communicated with and grounding device, [28] for coming coal pipeline, [29] are corrugated tube, [30] be equalizing valve, [31] are following coal valve.
Claims (5)
1, a kind of spray bituminous coal system for blast furnace is characterized in that it is become by four groups of subsystems: (1) three jar of continuous pressure pan group of eclipsed form; (2) injecting coal quantity continuous metering system; (3) coal powder injection of single tube road and metering regulation system; (4) safety system.
2, a kind of according to the said blowing bituminous coal novel process of claim 1, it is characterized in that the continuous pressure pan group of said three jars of eclipsed forms is made up of the big bagroom of inner filtration, receipts powder jar, storage coal jar, winding-up jar and swing clock valve.
3, a kind of according to claim 1 or 2 said blowing bituminous coal novel procesies, it is characterized in that said injecting coal quantity continuous metering system is made up of weight sensor, metallic bellows (loop expansion pipe) and corresponding circuit devcie.
4, a kind of according to claim 1,2,3 said blowing bituminous coal novel procesies, it is characterized in that road coal powder injection of said single tube and metering regulation system by automatic and adjustable coal feeder, long-lived conical distributor, be flexible coupling, air distributor and various operated pneumatic valve, water trap, strainer, coal powder injection house steward, coal jetting branch, spray gun and air port form.
5, a kind of according to the said blowing bituminous coal novel process of claim 1～4, it is characterized in that said safety system is by nitrogen allocation packet and pipe network, fast and safely trip valve, pressure unit, explosion-proof thermometric galvanic couple, venting of dust explosion hole, waterproof check fluidisation device, static connection and grounding device and sequence control valve are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106119 CN1030398C (en) | 1992-04-06 | 1992-04-06 | Spray bituminous coal system for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92106119 CN1030398C (en) | 1992-04-06 | 1992-04-06 | Spray bituminous coal system for blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1065098A true CN1065098A (en) | 1992-10-07 |
| CN1030398C CN1030398C (en) | 1995-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92106119 Expired - Fee Related CN1030398C (en) | 1992-04-06 | 1992-04-06 | Spray bituminous coal system for blast furnace |
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| Country | Link |
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| CN (1) | CN1030398C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115799A (en) * | 2009-12-31 | 2011-07-06 | 宝钢集团新疆八一钢铁有限公司 | Method for injecting high-volatile bituminous coal into blast furnace |
| CN102477467A (en) * | 2010-11-29 | 2012-05-30 | 宝山钢铁股份有限公司 | Method for determining coal injection quantity of coal injection system of blast furnace |
| CN103468842A (en) * | 2013-09-10 | 2013-12-25 | 北京首钢自动化信息技术有限公司 | Real-time online statistic method for injection amount of blast furnace coal injection system |
| CN103667557A (en) * | 2012-09-20 | 2014-03-26 | 西林钢铁集团有限公司 | Double-feeding system for nitrogen and compressed air for coal powder injection |
| CN107652990A (en) * | 2017-10-24 | 2018-02-02 | 北京神雾电力科技有限公司 | A kind of pyrolysis oven feed system |
| CN113102088A (en) * | 2021-04-10 | 2021-07-13 | 南京工程学院 | Full-automatic autonomous centralized control device and method for large-scale blast furnace pulverizing system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7365575B2 (en) * | 2019-08-09 | 2023-10-20 | 三菱マテリアル株式会社 | Continuous ore feeding device |
-
1992
- 1992-04-06 CN CN 92106119 patent/CN1030398C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102115799A (en) * | 2009-12-31 | 2011-07-06 | 宝钢集团新疆八一钢铁有限公司 | Method for injecting high-volatile bituminous coal into blast furnace |
| CN102477467A (en) * | 2010-11-29 | 2012-05-30 | 宝山钢铁股份有限公司 | Method for determining coal injection quantity of coal injection system of blast furnace |
| CN103667557A (en) * | 2012-09-20 | 2014-03-26 | 西林钢铁集团有限公司 | Double-feeding system for nitrogen and compressed air for coal powder injection |
| CN103468842A (en) * | 2013-09-10 | 2013-12-25 | 北京首钢自动化信息技术有限公司 | Real-time online statistic method for injection amount of blast furnace coal injection system |
| CN107652990A (en) * | 2017-10-24 | 2018-02-02 | 北京神雾电力科技有限公司 | A kind of pyrolysis oven feed system |
| CN113102088A (en) * | 2021-04-10 | 2021-07-13 | 南京工程学院 | Full-automatic autonomous centralized control device and method for large-scale blast furnace pulverizing system |
| CN113102088B (en) * | 2021-04-10 | 2022-08-30 | 南京工程学院 | Full-automatic autonomous centralized control device and method for large-scale blast furnace pulverizing system |
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| Publication number | Publication date |
|---|---|
| CN1030398C (en) | 1995-11-29 |
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