CN2649965Y - Fluidized coal-spraying mixer - Google Patents
Fluidized coal-spraying mixer Download PDFInfo
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- CN2649965Y CN2649965Y CN 200320101499 CN200320101499U CN2649965Y CN 2649965 Y CN2649965 Y CN 2649965Y CN 200320101499 CN200320101499 CN 200320101499 CN 200320101499 U CN200320101499 U CN 200320101499U CN 2649965 Y CN2649965 Y CN 2649965Y
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- coal
- mixing tank
- fluidizing
- fluidisation
- injection
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Abstract
The utility model pertains to technical field of blast furnace ironmaking, pneumatic transmission and jet metallurgy in steel industry, and is suitable for coal injection system of blast furnace coal injection, rotary kiln coal injection, hot metal pretreatment and ladle refining. The utility model comprises a blender body, a gas pipe, a set casing, an injection pipe, a nozzle, a fluidizing pipe, a fluidizing plate, tubing guide. The gas is transmitted into the blender body via the gas pipe, the set casing, the injection pipe, the nozzle at the tail end of the blender; the transmitted gas form high pressure jet inside the blender body to produce the partial negative pressure to drive the pulverized coal to move forward. A fluidizing bed is equipped at the bottom of the blender, the fluidized gas enters into the blender via the fluidizing pipe, the fluidizing chamber and the fluidizing plate to make the pulverized coal fluidization in the blender in order to increase the transmission energy of motion and fluidity, improving the coal injection volume and reducing the consumption of the transmitted gas. By adopting the fluidizing coal feeding, the utility model can increase the coal injection volume, eliminate the pulse coal flow and realize the long-distance injection and transmission of the pulverized coal.
Description
Affiliated technical field
The utility model belongs to blast furnace ironmaking in the Iron And Steel Industry, air conveying, spraying metallurgy technology field, is applicable to the coal injection system of pulverized coal injection, rotary kiln coal powder injection, hot metal pretreatment, ladle refining.
Background technology
At present, pulverized coal injection has multiple structural shape with mixing tank, and under the condition of blast furnace big coal injection amount, these coal powder injection mixing tanks all exist many technological deficiencies and deficiency.
(1) spiral coal feeder
Screw-type coal distributor is applicable to the normal pressure coal powder injection, generally adopts on small blast furnace.Because the constructional feature of this kind coal feeder can only be used for the normal pressure coal powder injection, be difficult to improve injecting coal quantity, more be not suitable for the coal powder injection of large-scale high pressure blast furnace, progressively eliminated.
(2) inspirator mixer
Inspirator mixer is widely used on China's blast furnace, is a kind of Pneumatic conveyer of routine.Its principle is: the coal dust in the coal powder injection jar enters in the mixing tank under the effect of jar internal pressure, high pressure carrier gas spray tube in the mixing tank forms the injection air-flow and produces negative pressure, the motion of drive coal dust, coal dust rely on the kinetic energy of pressure and successive injection air-flow to be arrived blast furnace by spray feed.This jet mixer is simple in structure, and injecting coal quantity also can reach 200kg/t, but because the characteristic that jet-type is carried, in coal spraying pipeline, form pulsation coal stream easily, produce the plunger phenomenon, the coal spraying pipeline fed distance can not be long, and can not realize online injecting coal quantity regulation and control.
(3) mechanical conditioning type mixing tank
As the mechanical conditioning type mixing tank that patent 91108844 and patent 93247743.7 are announced, this mixing tank is by a kind of coal dust motorized adjustment device, and the aperture of regulating coal outlet in the mixing tank is applied on blast furnace with the control injecting coal quantity.But this mixer machine complex structure, the manufacturing cost height, after the coal outlet aperture is greater than 60%, the sharpness of regulation misalignment, coal outlet nozzle mechanical wear is serious, and electric operator needs frequent repair and maintenance.And the drag losses of mechanical conditioning type mixing tank is bigger than the mixing tank of other pattern, adopts this mixing tank to be difficult to realize the conveying of coal dust concentrated phase.
(4) strength is regulated the concentrated phase mixing tank
As the concentrated phase mixing tank that patent 98208968.2 and patent 99201065.9 are announced, these two kinds of mixing tanks all are to realize dense phase injection by the kinetic energy of intensified negative pressure injection.At present in, begun to use strength on the small furnace and regulated the concentrated phase mixing tank, but its injecting coal quantity maximum only is 15～18t/h, can not satisfy the blast furnace coal than the production requirement that reaches 200kg/t.Because this strength is regulated the constructional feature of concentrated phase mixing tank, be difficult on the large-scale high pressure blast furnace and be applied, and be not suitable for the coal injection system that the long distance of coal dust is carried.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiencies in the prior art and defective, thereby designs a kind of simple and reasonablely, can realize the big coal injection amount, and be applicable to the fluidisation coal powder injection mixing tank that the long distance of coal dust is carried.The utlity model has that simple in structure, coal-supplying amount is big, long service life, drag losses are little, carrier gas consumes low characteristics, and can online adjusting injecting coal quantity, be applicable to that the long distance winding-up of coal dust carries.
The utility model relates to a kind of fluidization coal powder injection mixing tank, comprise mixing tank body, gas transmission short tube, locating sleeve, gas transmission blind flange, spray tube, nozzle, mode by flange bolt, screw thread or welding between each parts connects, be provided with the fluidized-bed that to realize the fluidization coal powder injection in mixing tank body bottom, the nozzle that the working position in the mixing tank body is provided with the spray tube that can regulate and can changes according to injecting coal quantity or wear pattern.
In the bottom of mixing tank body, the fluidized-bed of being made up of fluidisation short tube, fluidisation blind flange, fluidising chamber, fluidisation plate is set.
Locating sleeve is provided with internal thread, and the spray tube tail end is provided with outside screw, can regulate the working position of spray tube in the mixing tank body.
Welding end cap in fluidisation short tube top is offered 4～6 apertures on the fluidisation short tube.
Coal dust in coal powder injection jar coal mouth under warp under the effect of jar internal pressure and gravity enters into the mixing tank body, the mixing tank body is a cruciform, delivery of carrier gas enters the mixing tank body by pneumatic tube, locating sleeve, spray tube, the nozzle that is located at the mixing tank tail end, delivery of carrier gas forms high-pressure spray and produces local decompression in the mixing tank body, drive coal dust and travel forward.Carry smooth and easy for realizing coal dust, improve injecting coal quantity, eliminate pulsation coal stream and plunger phenomenon in the coal spraying pipeline, increase the transport flow of coal dust, in the mixing tank bottom fluidized-bed is set, fluidizing agent enters in the mixing tank through fluidisation pipe, fluidising chamber, fluidisation plate, make coal dust in mixing tank, be in fluidization, to increase the conveying kinetic energy and the transport flow of coal dust, improve injecting coal quantity, reduce the consumption of delivery of carrier gas.Because the utility model adopts the fluidization coal-feeding mode, can realize that the long distance winding-up of coal dust is carried.
Compare with prior art, the utility model does not have drive disk assembly, the equipment good airproof performance, and it is little to wear and tear, long service life.And be provided with fluidising chamber in mixing tank body bottom, and make the coal dust of internal mixer be in fluidized state, thereby can improve coal-supplying amount, eliminate ducted pulsation coal stream and plunger phenomenon, help realizing growing and carry apart from coal dust.By regulating the online regulation and control injecting coal quantity of fluidization gas.Therefore the utlity model has simple in structure, long service life, drag losses is little, the carrier gas consumption is low, injecting coal quantity is adjustable, be suitable for the characteristics of the long distance winding-up of coal dust.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is the utility model fluidization coal powder injection mixer structure synoptic diagram.
1. gas transmission short tubes among the figure, 2. locating sleeve, 3. gas transmission blind flange, 4. mixing tank body, 5. thrust-augmenting nozzle, 6. spray tube, 7. nozzle, 8. fluidisation short tube, 9. fluidisation blind flange, 10. end cap, 11. fluidising chamber, 12. fluidisation plates.
Embodiment
In Fig. 1, coal dust in the coal powder injection jar is under the effect of pressure and gravity, warp coal mouth down enters in the mixing tank body 4, the afterbody of mixing tank body 4 and gas transmission blind flange 3 pass through Bolt Connection, gas transmission short tube 1 and locating sleeve 2 are welded on the gas transmission blind flange 3, locating sleeve 2 is provided with internal thread, be provided with externally threaded spray tube 6 with tail end and pass through thread connection, can pass through the depth of penetration of threaded adjusting spray tube 6 in mixing tank body 4, make spray tube 6 be in best operational position, the front end of spray tube 6 connects with nozzle 7 by screw thread.The front end of mixing tank body 4 and thrust-augmenting nozzle 5 are by Bolt Connection, and the other end of thrust-augmenting nozzle 5 is connected with coal spraying pipeline.The bottom of mixing tank body 4 is a fluidized-bed, and fluidisation blind flange 9 connects with mixing tank body 4 by bolt, and welding end cap 10 in the upper end of fluidisation short tube 8 evenly is provided with 4～6 apertures on the fluidisation short tube 8, make fluidizing agent can be in fluidising chamber 11 uniform distribution.Fluidising chamber 11 is welded on the fluidisation blind flange 9, its top welding fluidisation plate 12, enter the fluidizing agent of fluidising chamber 11 through fluidisation short tube 8, evenly enter in the mixing tank body 4 through fluidisation plate 12, make the coal dust in the mixing tank body 4 be in fluidized state, with the conveying kinetic energy and the homogeneity of raising coal dust, thereby improve the coal powder injection ability.The utility model can be realized the online regulation and control of injecting coal quantity by regulating delivery of carrier gas amount and fluidization gas.
Claims (4)
1. fluidization coal powder injection mixing tank, comprise mixing tank body, gas transmission short tube, locating sleeve, gas transmission blind flange, spray tube, nozzle, fluidisation short tube, fluidisation blind flange, mode by flange bolt, screw thread or welding between each parts connects, it is characterized in that: be provided with the fluidized-bed that to realize the fluidization coal powder injection in mixing tank body (4) bottom, the nozzle (7) that the working position in mixing tank body (4) is provided with the spray tube (6) that can regulate and can changes according to injecting coal quantity or wear pattern.
2. fluidization coal powder injection mixing tank as claimed in claim 1 is characterized in that: the bottom in mixing tank body (4) is provided with the fluidized-bed of being made up of fluidisation short tube (8), fluidisation blind flange (9), fluidising chamber (11), fluidisation plate (12).
3. fluidization coal powder injection mixing tank as claimed in claim 1 is characterized in that: locating sleeve (2) is provided with internal thread, and spray tube (6) tail end is provided with outside screw, can regulate the working position of spray tube (6) in mixing tank body (4).
4. fluidization coal powder injection mixing tank as claimed in claim 1 is characterized in that: fluidisation short tube (8) top welding end cap (10), offer 4～6 apertures on the fluidisation short tube (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101499 CN2649965Y (en) | 2003-10-20 | 2003-10-20 | Fluidized coal-spraying mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320101499 CN2649965Y (en) | 2003-10-20 | 2003-10-20 | Fluidized coal-spraying mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2649965Y true CN2649965Y (en) | 2004-10-20 |
Family
ID=34339683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320101499 Expired - Lifetime CN2649965Y (en) | 2003-10-20 | 2003-10-20 | Fluidized coal-spraying mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2649965Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806459A (en) * | 2010-04-16 | 2010-08-18 | 施芜 | Flue gas ejector |
| CN102029234A (en) * | 2010-11-17 | 2011-04-27 | 陈家文 | Powder coating fluidization ejector |
| CN108313735A (en) * | 2018-03-08 | 2018-07-24 | 眉山市建远商贸有限公司 | A kind of defeated ash pump |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
-
2003
- 2003-10-20 CN CN 200320101499 patent/CN2649965Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806459A (en) * | 2010-04-16 | 2010-08-18 | 施芜 | Flue gas ejector |
| CN102029234A (en) * | 2010-11-17 | 2011-04-27 | 陈家文 | Powder coating fluidization ejector |
| CN108313735A (en) * | 2018-03-08 | 2018-07-24 | 眉山市建远商贸有限公司 | A kind of defeated ash pump |
| CN110186036A (en) * | 2019-06-17 | 2019-08-30 | 华北电力大学 | A kind of low nitrogen turbulent burner of microfine coal heterogeneous reduction and remodeling method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131020 Granted publication date: 20041020 |