CN101761934B - Burning method for pulverized solid fuels transferred by dilute phase pneumatic in tunnel kiln and dilute phase pneumatic transferring system - Google Patents
Burning method for pulverized solid fuels transferred by dilute phase pneumatic in tunnel kiln and dilute phase pneumatic transferring system Download PDFInfo
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- CN101761934B CN101761934B CN2010100289475A CN201010028947A CN101761934B CN 101761934 B CN101761934 B CN 101761934B CN 2010100289475 A CN2010100289475 A CN 2010100289475A CN 201010028947 A CN201010028947 A CN 201010028947A CN 101761934 B CN101761934 B CN 101761934B
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Abstract
The invention discloses a burning method for pulverized solid fuels transferred by dilute phase pneumatic in a tunnel kiln and a dilute phase pneumatic transferring system. The method is to transfer solid carbonaceous fuel powder through dilute phase pneumatic which combines positive pressure pressing-deliver type and negative pressure inhaling-deliver type, directly spray the powder into a tunnel kiln to burn, wherein the solid carbonaceous fuel powder is sulfurized three times during the transferring process. According to the invention, the structure of existing tunnel kilns is not changed, pulverized solid fuels (such coal powder, petrol coke powder etc. ) which are utilized as fuel for firing refractory material, are directly sprayed into the kiln to burn, thereby greatly increasing the utilization rate of the fuel, saving fuel cost and reducing cost for firing refractory material.
Description
Technical field
The invention belongs to tunnel cave fuel and fire refractory technology, be specifically related to a kind of employing dilute phase pneumatic conveying method of carbonaceous solids powder fuel that uses and directly spray into the technology that tunnel cave is fired refractory material.
Background technology
Tunnel cave generally is a long linear tunnel, and fixing wall and vault are arranged at its both sides and top, is moving kiln car on the track that lay the bottom.Combustion apparatus is located at the both sides, middle part of tunnel cave, constituted fixing high temperate zone--clinkering zone, the high-temperature flue gas that burning produces is under the effect of tunnel cave front end chimney or air-introduced machine, flow to the kiln hood direction along the tunnel, preheating enters the interior goods of kiln step by step simultaneously, and this section constituted the preheating zone of tunnel cave.Kiln tail at tunnel cave blasts cold wind, and back one section goods in the cooling tunnel kiln, the cold wind that blasts are flowed through goods and after being heated, being extracted out and send into the thermal source of drier as dried, and this section just constituted the salband of tunnel cave.
Place the saggar of the ceramic of packing on chassis, the inlet by the preheating zone pushes (conventional machinery pushes) at leisure continuously, and is loaded with the chassis of the product of burning till, and just the outlet by salband is pushed out (about about 1 hour, release a car) gradually.
The used for refractory material tunnel cave can be divided three classes by serviceability temperature:
1) low temperature tunnel cave-firing temperature is about 1000 ℃, and being mainly used in the roasting sliding plate brick has the goods of special process requirement with some other.
2) warm tunnel cave in: 1300 ℃～1650 ℃ of firing temperatures are mainly used in goods such as burning till common basic brick, clay brick, high-alumina brick, sliding plate brick, nozzle brick, silica brick.
3) hyperthermia tunnel Kiln: firing temperature is greater than 1700 ℃, generally between 1800 ℃～1900 ℃, is mainly used in and burns till middle-grade magnesia brick, high-puritied magnesia brick, directly in conjunction with goods such as magnesite-chrome brick, magnalium matter and corundum matter.
At present domesticly fire the tunnel cave fuel that refractory material adopts and supply with: Solid-liquid Mixed Fuel that main oil plant such as diesel oil or heavy oil is a liquid phase or natural gas etc. nothing more than following several, because the converted products price of oil and coal is constantly soaring in recent years, the ratio that makes the expense of above-mentioned fuel fire in the cost at refractory material increases substantially.
And the present technology that also carbonaceous solids powder fuel is not directly sprayed into tunnel cave fuel.
Summary of the invention
Method and the dilute phase air-transport system that the conveying powdered solid fuel ignition that utilizes the dilute phase strength in a kind of tunnel cave is provided of the present invention to reduce the consumption of oil and natural gas, reduces cost.
Utilize the method for the conveying powdered solid fuel ignition of dilute phase strength in the tunnel cave of one of realization the object of the invention, it is the conveying of dilute phase strength that the powder of solid carbon fuel is combined with the vacuum pressure conveying formula through the malleation pressure sending type, directly spray into the tunnel cave internal combustion, the powder of solid carbon fuel is through three sulfurations in course of conveying.
In course of conveying, the powder of solid carbon fuel with carrying the gas weight ratio is: 1～30: 1.
The conveying of described dilute phase strength is: the powder of solid carbon fuel is in powder winding-up jar, carry under the effect of gas medium, after making powder and carrying the preliminary fluidisation of gas medium to mix, after mixing through secondary fluidisation bottom discharge formula conveyer secondary fluidisation again, at the uniform velocity be delivered in the blender, be transported to the powder divider through discharge tube, the powder uniform distribution to each outlet after the solid powder burner be sprayed onto in the ceramic stove; Described powder to blender, is that the malleation pressure sending type is carried from the winding-up jar; Powder forms a region of no pressure in blender, carry powder to the powder divider with the vacuum pressure conveying formula.
Three sulfurations of the powder of described solid carbon fuel are: carry out fluidisation one time in a powder winding-up jar tapering, carry out bottom discharge secondary fluidisation in a powder winding-up jar bottom, carry out fluidisation three times in the blender bottom.
Realize that two the tunnel cave of the object of the invention directly sprays into the dilute phase air-transport system of powdered solid fuel, it comprises fuel storage powder storehouse, roof scrubber, compressed gas gas tank, powder winding-up jar, blender, reversal valve, divider and solid powder burner; Powder winding-up pot bottom is equipped with the fluidisation device, roof scrubber is connected with fuel storage powder storehouse, the storehouse outlet of fuel storage powder is connected with powder winding-up jar through tremie pipe, the compressed gas gas tank through appendix respectively with powder winding-up jar, blender is connected, powder winding-up jar top is connected with fuel storage powder storehouse through diffusing appendix, a powder winding-up jar bottom is connected with blender through duff pipe, blender is connected with reversal valve through pulverized coal feed pipe, reversal valve is connected with the import of divider through pulverized coal feed pipe, divider has some outlets, its some outlets are connected with the solid powder burner respectively, the gas manifold of solid powder burner is received the compressed gas gas tank, between described blender bottom and the compressed gas gas tank by communicating.
In the technique scheme, solid-fuelled powder enters powder winding-up jar from fuel storage powder storehouse by tremie pipe, powder adopts dilute phase strength and three fluidisation homogeneous phase technology to be transported to the solid powder burner from the winding-up jar, solid material mixes with oxygen-containing gas, evenly enters blender after suspension and the fluidization treatment in powder winding-up jar, powder is fully mixed with oxygen-containing gas, and the oxygen-containing gas of the high speed under system's gas pressure and powder mixed state are continuous, stable, the pulseless tunnel cave internal combustion that sprays into; Regulate the powder blowing tank pressure and carry tolerance can regulate the amount of dusting size, regulate and carry tolerance can regulate powder and the air mixed proportion and the length of flame; Regulate the tolerance of the gas manifold of solid powder burner and also can regulate furnace flame length.
The corresponding two cover powder winding-up jars in fuel storage bottom, powder storehouse, blender, two cover powder winding-up jars, blender are connected with reversal valve by duff pipe, one cover powder winding-up jar is when winding-up, another set of powder winding-up jar diffuses, feeds, waits for, after treating that a cover powder winding-up jar winding-up is finished, switch to another set of powder winding-up jar winding-up by reversal valve, the assurance system can burn to the tunnel cave feed continuously.
The top in powder storage powder storehouse also is provided with deduster, and the jar inner high voltage gas after the winding-up jar winding-up, filters by deduster and discharges to powder storage powder storehouse through discharge of pipes.
Described powder winding-up jar is equipped with LOAD CELLS.
The outlet of described divider is connected with tunnel cave by 1～N solid powder burner.
Main feature of the present invention is as follows:
The present invention realizes first that both at home and abroad carbonaceous solids powder fuel such as coal or petroleum coke powder are directly sprayed into tunnel cave replaces natural gas or heavy oil to fire refractory material, because coal in China or petroleum coke powder resource are very abundant, and it is cheap, save refractory material greatly and fired cost, for country saves a large amount of valuable oil and natural gas resources, enterprise brings considerable economic for refractory material.
According to the characteristics of tunnel cave, the present invention will adopt the dilute phase pneumatic conveying method to be applied to the tunnel cave burning first; Need a large amount of oxygen (C+O2=CO2) during because of coal or petroleum coke powder burning, for guaranteeing the fully burning in tunnel cave of coal or petroleum coke powder, native system adopts the dilute phase pneumatic conveying method, adopts a large amount of oxygen-containing gas to be transported to the tunnel cave internal combustion in system with after coal or petroleum coke powder fully mix.
According to the tunnel cave characteristics, the present invention is applied to three fluidization techniques of powder the tunnel cave burning first, in a powder winding-up jar tapering fluidisation device is set one time, in a powder winding-up jar bottom bottom discharge fluidisation device (secondary fluidisation) is set, in the blender bottom fluidisation device (three fluidisations) is set, these facilities guarantee that fully coal or petroleum coke powder mix mutually with the conveying air, realize the homogeneous phase conveying in defeated powder house steward, guarantee solid fuel steady and continuous burning in tunnel cave.
The present invention is under the prerequisite that does not change original tunnel cave stove structure, solid powder fuel (as coal dust, petroleum coke powder etc.) directly sprayed in the kiln as the fuel of firing refractory material burn, thereby improve the utilization rate of fuel significantly, the fuel saving cost is to reduce the fire-resistant cost of firing.Simultaneously, this fuel feed system also is applicable to be each class A furnace A of fuel with oil at present.
Description of drawings
Fig. 1 is a system schematic of the present invention.
Fig. 2 is a bottom discharge formula fluidisation device schematic diagram of the present invention.
Fig. 3 is a blender schematic diagram of the present invention.
Fig. 4 is a divider schematic diagram of the present invention.
1-advances powder filter, 2-fuel storage powder storehouse, 3-deduster, 4-compressed gas gas tank among the figure, 5-powder winding-up jar, 6-LOAD CELLS, fluidisation device of 7-, 8-bottom discharge formula fluidisation formula, 9-blender, 10-divider, 11-powder burner gas transmission arm, 12-solid powder burner, 13-tunnel cave, 14-pressure transmitter, the 15-reversal valve.
The specific embodiment
Below, in conjunction with specification drawings and specific embodiments the present invention is further described, but protection category of the present invention is not limited thereto.
Arrive shown in Figure 4 as Fig. 1, adopt dilute phase pneumatic conveying method and three fluidisation homogeneous phase technology that carbonaceous solids powder fuel such as coal or petroleum coke powder are directly sprayed into tunnel cave and fire the refractory material fuel feed system, be provided with 1-and advance powder filter, 2-fuel storage powder storehouse, 3-deduster, 4-compressed gas gas tank, 5-powder winding-up jar, 6-LOAD CELLS, fluidisation device of 7-, 8-bottom discharge formula fluidisation conveyer, 9-blender, 10-divider, 11-powder burner gas transmission arm, 12-solid powder burner, 14-pressure transmitter, the 15-reversal valve.
Advance powder filter 1 and is connected through the top in powder inlet pipe and fuel storage powder storehouse 2, the outlet of fuel storage 2 bottoms, powder storehouse is connected through tremie pipe and powder winding-up jars 5, and fluidisation device 7 is located at powder and is jetted in the tapering of jar 5; The bottom of powder winding-up jar 5 is connected with secondary fluidisation bottom discharge formula conveyer 8; The discharging opening of secondary fluidisation bottom discharge formula conveyer 8 is connected with the charging aperture of blender 9, and the discharging opening 103 of blender 9 is connected through the charging aperture of discharge tube with divider 10, divider 10 has 1～N outlet to be connected with tunnel cave 13 by solid powder burner 12, establishes an arm 11 on the solid powder burner 12 and is connected respectively to compressed gas gas tank 4; Compressed gas gas tank 4 also is connected with blender 9 with powder winding-up jar 5, fluidisation blenders 7, secondary fluidisation bottom discharge formula conveyers 8 respectively through appendix.Thereby the method for carrying with the dilute phase strength directly sprays into tunnel cave 13 internal combustion with the powder of solid carbon fuel.
Wherein, the corresponding two cover powder winding-up jars in fuel storage bottom, powder storehouse, blender, two cover powder winding-up jars, blender are connected with reversal valve by duff pipe, one cover powder winding-up jar is when winding-up, another set of powder winding-up jar diffuses, feeds, waits for, after treating that a cover powder winding-up jar winding-up is finished, switch to another set of powder winding-up jar winding-up by reversal valve, the assurance system can burn to the tunnel cave feed continuously.Reversal valve is a threeway pneumatic ball valve or by the opposite pneumatic ball valves combination of two switches.
Wherein, the top in powder storage powder storehouse 2 also is provided with deduster 3, and powder, is carried gas to filter by deduster 3 and discharged after powder is sent to by carrying gas to be transported to powder storage powder storehouse 2 by advancing powder filter 1 through pulverized coal feed pipe.
Wherein, described powder winding-up jar 5 taperings are built-in with fluidisation device 7 one time.
Wherein, the top of described powder winding-up jar 5 is equipped with pressure transmitter 14.
As shown in Figure 3, described blender 9 has top charging aperture 101, bottom air inlet 102, anterior discharging opening 103, rear portion air inlet 104, and wherein the air inlet screw rod can free adjustment length.Top charging aperture 101 links to each other with the discharging opening of bottom discharge formula fluidisation device 8, anterior discharging opening 103 is connected with divider 10, three the fluidisation air inlets 102 in bottom are connected with compressed gas gas tank 4, rear portion air inlet 104 by one can free adjustment length air inlet screw rod 105 also be connected with compressed gas gas tank 4, guaranteed that effectively powder mixes.Air inlet screw rod 105 can be a routine techniques.
Wherein, described powder winding-up jar 5 is equipped with LOAD CELLS 6.
Wherein, the outlet of described divider 10 is connected with ceramic stove 13 by 1～N solid powder burner 12.
Advance powder filter 1 and under the effect of conveying gas, solid-fuelled powder is transported to powder storage powder storehouse 2 through pulverized coal feed pipe, carry gas to filter discharge by the deduster 3 of Cang Ding.Powder in the storage powder storehouse 3 arrives powder winding-up jar 5 by tremie pipe, after the fluidisation blender 7 of powder in the powder winding-up jars 5 by its tapering makes powder and the preliminary fluidisation of conveying gas medium mixed, after mixing through secondary fluidisation bottom discharge formula conveyer 8 secondary fluidisations again, at the uniform velocity be delivered in the blender 9, be transported to divider 10 through discharge tube, divider 10 has some outlets, the powder uniform distribution to each outlet after solid powder burner 12 be sprayed onto in the ceramic stove 13.Powder, belongs to positive-pressure type and carry, and powder forms a region of no pressure in blender 9, send formula (negative pressure) formula mode to carry powder to divider 10 with suction to blender 9 from winding-up jar 5.This method and three fluidisation homogeneous phase technology of sending the conveying of formula (negative pressure) the dilute phase strength that formula combines with force feed (malleation) formula and suction, it is even to have guaranteed effectively that not only powder fuel is carried, stable, continuously, and can control to adjust the winding-up amount of the required powder of whole kiln flexibly.
The operation principle that above-mentioned three fluidisation homogeneous phase technology powders are carried is to be built-in with fluidisation blender 7 one time in the powder winding-up jar 5, and pumped (conveying) medium can tentatively be mixed with powder, becomes suspended state.The pumped (conveying) medium that enters secondary fluidisation device 8 from its top, end around the diffuse metal web plate evenly enter, and 8 employings of secondary fluidisation conveyer is the bottom discharge form, the even mixed distribution that this effectively guarantees gas-solid biphase flow evenly flows out downwards from eminence as liquid then.It is even, stable to have guaranteed that so dusty fuel is carried, continuously.When powder process blender 9, the pumped (conveying) medium that enters three fluidisation devices from the bottom air inlet of blender 9 carries out fluidisation for the third time to powder once more, this is more effective, and to have guaranteed that dusty fuel is carried in pipeline more even, realizes homogeneous stability and carry continuously.
The size of the pumped (conveying) medium throughput that enters from the height of the tank pressure of powder winding-up jars 5 with from the anterior air inlet 103 of blender 9 then plays the size of the amount of dusting in the accurate adjusting unit interval.And the length of flame of solid powder burner 12 ejection is mainly regulated by the adjusting length of the air inlet screw rod of blender 9, the length of the throughput size fine setting flame of gas transmission arm 14 that also can be by regulating solid powder burner 12.
In course of conveying, the powder of solid carbon fuel with carrying the gas weight ratio is: 1～30Kg: 1Kg.Adopt per kilogram gas can carry the dilute phase pneumatic conveying method of 1-30KG solid powder, combine with force feed (malleation) formula, discharge pressure is low, pipe wear is little, energy-conserving and environment-protective, and winding-up is stable, powder is with air mixes, the sunken adjustable length of powder fire in powder sufficient combustion, each solid powder burner distributed uniform and the kiln, improves the utilization rate of fuel significantly, the fuel saving cost reduces refractory material greatly and fires cost.
This system adopts the storage powder storehouse of sealing and powder winding-up jar, is transported to the injection system powder all the time airtight environment from powder, and top, storehouse filter collector concentration of emission is less than 30mg/m on the storage powder storehouse
3, system can adopt nitrogen or compressed air spraying, does not have other pernicious gases in the production and enters in the atmosphere, and environmental protection effect is good.
Claims (5)
1. utilize the method for the conveying powdered solid fuel ignition of dilute phase strength in the tunnel cave, it is the conveying of dilute phase strength that the powder of solid carbon fuel is combined with the vacuum pressure conveying formula through the malleation pressure sending type, directly spray into the tunnel cave internal combustion, the powder of solid carbon fuel is through three fluidisations in course of conveying.
2. utilize the method for the conveying powdered solid fuel ignition of dilute phase strength according to claim 1 in the tunnel cave, it is characterized in that in course of conveying, the powder of solid carbon fuel with carrying the gas weight ratio is: 1～30: 1.
3. utilize the method for the conveying powdered solid fuel ignition of dilute phase strength according to claim 1 in the tunnel cave, the conveying that it is characterized in that described dilute phase strength is: the powder of solid carbon fuel is in powder winding-up jar, carry under the effect of gas medium, after making powder and carrying the preliminary fluidisation of gas medium to mix, after mixing through secondary fluidisation bottom discharge formula conveyer secondary fluidisation again, at the uniform velocity be delivered in the blender, be transported to the powder divider through discharge tube, the powder uniform distribution to each outlet after the solid powder burner be sprayed onto in the ceramic stove; Described powder to blender, is that the malleation pressure sending type is carried from the winding-up jar; Powder forms a region of no pressure in blender, carry powder to the powder divider with the vacuum pressure conveying formula.
4. utilize the method for the conveying powdered solid fuel ignition of dilute phase strength according to claim 1 in the tunnel cave, three fluidisations that it is characterized in that the powder of described solid carbon fuel are: carry out fluidisation one time in a powder winding-up jar tapering, carry out bottom discharge secondary fluidisation in a powder winding-up jar bottom, carry out fluidisation three times in the blender bottom.
5. utilize the method for the conveying powdered solid fuel ignition of dilute phase strength according to claim 1 in the tunnel cave, the powder that it is characterized in that described solid carbon fuel is petroleum coke powder and/or coal dust material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100289475A CN101761934B (en) | 2010-01-08 | 2010-01-08 | Burning method for pulverized solid fuels transferred by dilute phase pneumatic in tunnel kiln and dilute phase pneumatic transferring system |
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| CN2010100289475A CN101761934B (en) | 2010-01-08 | 2010-01-08 | Burning method for pulverized solid fuels transferred by dilute phase pneumatic in tunnel kiln and dilute phase pneumatic transferring system |
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| CN101761934A CN101761934A (en) | 2010-06-30 |
| CN101761934B true CN101761934B (en) | 2011-09-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398395A (en) * | 2013-07-15 | 2013-11-20 | 湖南万通达燃气技术有限公司 | Method and system for ultra-dilute-phase pneumatic conveying of petroleum coke powdered solid fuel for combustion |
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| CN1903756A (en) * | 2006-07-29 | 2007-01-31 | 威海蓝星玻璃股份有限公司 | Method of solid fuel fusion cast glass and fuel supply system |
| CN201031196Y (en) * | 2007-05-17 | 2008-03-05 | 武汉华尔顺冶金工程技术有限公司 | Fine material conveying and blowing device used for float glass kiln |
| CN201232046Y (en) * | 2008-04-17 | 2009-05-06 | 武汉华尔顺冶金工程技术有限公司 | Special blowing tank for float glass furnace coal fines or refinery coke powder and mixing powder spraying system |
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2010
- 2010-01-08 CN CN2010100289475A patent/CN101761934B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2512998Y (en) * | 2001-12-04 | 2002-09-25 | 上海新星静电喷涂设备厂 | Coal firing boiler smoke desulfurizing agent Ca(OH)2 powder fluidizing bucket |
| CN1903756A (en) * | 2006-07-29 | 2007-01-31 | 威海蓝星玻璃股份有限公司 | Method of solid fuel fusion cast glass and fuel supply system |
| CN201031196Y (en) * | 2007-05-17 | 2008-03-05 | 武汉华尔顺冶金工程技术有限公司 | Fine material conveying and blowing device used for float glass kiln |
| CN201232046Y (en) * | 2008-04-17 | 2009-05-06 | 武汉华尔顺冶金工程技术有限公司 | Special blowing tank for float glass furnace coal fines or refinery coke powder and mixing powder spraying system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398395A (en) * | 2013-07-15 | 2013-11-20 | 湖南万通达燃气技术有限公司 | Method and system for ultra-dilute-phase pneumatic conveying of petroleum coke powdered solid fuel for combustion |
| CN103398395B (en) * | 2013-07-15 | 2016-04-06 | 湖南万通达燃气技术有限公司 | The method and system of super dilute phase pneumatic conveying petroleum coke pulverized solid fuel combustion |
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| CN101761934A (en) | 2010-06-30 |
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Effective date of registration: 20210730 Address after: 430071 805, building 5, No. 18, huashiyuan North Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan xinyongchang Energy Saving Technology Co.,Ltd. Address before: 430080 room 207, block g, Qingshan high tech entrepreneurship center, No. 35, metallurgical Avenue, Qingshan District, Wuhan City, Hubei Province Patentee before: WUHAN HUAERSHUN METALLURGICAL ENGINEERING TECHNOLOGY Co.,Ltd. |