CN110056866A - Fluidized bed second level whirlwind feeding back device and whirlwind feed back control method - Google Patents
Fluidized bed second level whirlwind feeding back device and whirlwind feed back control method Download PDFInfo
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- CN110056866A CN110056866A CN201810337020.6A CN201810337020A CN110056866A CN 110056866 A CN110056866 A CN 110056866A CN 201810337020 A CN201810337020 A CN 201810337020A CN 110056866 A CN110056866 A CN 110056866A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 235000021050 feed intake Nutrition 0.000 claims abstract description 13
- 239000011343 solid material Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims description 52
- 230000008676 import Effects 0.000 claims description 33
- 238000010926 purge Methods 0.000 claims description 16
- 238000005243 fluidization Methods 0.000 claims description 11
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 5
- 235000011613 Pinus brutia Nutrition 0.000 claims description 5
- 241000018646 Pinus brutia Species 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
- 230000002459 sustained effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 44
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/28—Control devices specially adapted for fluidised bed, combustion apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention discloses a kind of fluidized bed second level whirlwind feeding back device and whirlwind feed back control methods, fluidized bed second level whirlwind feeding back device includes feeding back device, primary cyclone and secondary cyclone, fluidized bed second level whirlwind feed back control method includes the following steps: (1) baker, (2) fluidized bed starts to feed intake to form solid material envelope, (3) whirlwind feed back.The advantage of the invention is that, during the heating of fluidized bed baker, after opened butterfly valve, hot gas can rapidly enter primary cyclone and secondary cyclone, it realizes the heating synchronous with fluidized bed of primary cyclone, secondary cyclone, avoids fluidized bed and feed intake after operation inside the first dipleg and the second dipleg the acutely caused coating shedding of heating；Butterfly valve and right angle pipeline are used cooperatively, using the angle of repose of solid particle, the rate of wear of butterfly valve is reduced, extends the service life of butterfly valve.
Description
Technical field:
The present invention relates to gasification technology fields, and in particular to fluidized bed second level whirlwind feeding back device and whirlwind feed back controlling party
Method.
Background technique:
Whirlwind material return system includes cyclone separator and feeding back device, and cyclone separator goes out the feed separation in raw gas
Come, material is back in fluidized bed by feeding back device.Wherein the main function of feeding back device is the stream during fluidized bed heating
The hot gas changed in bed can enter cyclone separator by feeding back device, it is ensured that cyclone separator synchronous can rise with fluidized bed
Temperature；And after fluidized bed starts to feed intake, cyclone separator traps material, and material can return to stream by dipleg and feeding back device
Change bed and prevents flue gas from playing a reversed role.
Feeding back device includes feed pipe, material returning valve and feed back pipeline.The material returning valve that recirculating fluidized bed fluidized bed uses at present
Predominantly U valve and flutter valve.The resistance ratios that U valve flows gas are larger, and during the heating of fluidized bed baker, hot gas cannot be quick
Into in cyclone separator, cause cyclone separator synchronous with fluidized bed realization cannot heat up, fluidized bed feeds intake after operation, whirlwind
The dipleg of separator acutely heats up, and coated inside thermal stress increases too fast, coating shedding.Flutter valve is needed before gasification furnace baker
It is manually entered inside pipeline and flutter valve is opened and is fixed by fuse, to realize that hot gas enters feeding back device and dipleg and makes it
The purpose of heating, it is cumbersome；After feeding intake, the material in dipleg is all pressed on the valve plate of flutter valve, leads to the work pressure of valve plate
Power is big, when the pressure of material reaches certain value, could drive flutter valve open, material always with valve plate sliding contact so that valve
Plate serious wear.
Summary of the invention:
The first purpose of this invention is to provide a kind of raw gas can be sufficiently separated with solid particle, and in baker
Period guarantees cyclone separator heating synchronous with fluidized bed, reduces the fluidized bed second level whirlwind feed back dress of feeding back device failure rate
It sets.
Second object of the present invention is that provide one kind guarantees cyclone separator liter synchronous with fluidized bed during baker
Temperature reduces the fluidized bed second level whirlwind feed back control method of feeding back device failure rate.
First mesh of the invention is implemented by following technical solution: fluidized bed second level whirlwind feeding back device comprising feed back
Device, primary cyclone and secondary cyclone, the feeding back device include level-one feeding back device and second level feed back dress
It sets；
The level-one feeding back device includes the first feed pipe being vertically arranged, the top of first feed pipe and described one
The first dipleg connection of grade cyclone separator, the bottom end of first feed pipe are connected with first level feed back pipe, and described first
Feed pipe is connected to the first level feed back pipe；The first level feed back pipe is equipped with end socket, institute close to one end of fluidized bed
It states first level feed back pipe and is connected with the second horizontal feed back pipe far from one end of the fluidized bed；The first level feed back pipe
Side wall is equipped with first and loosens gas import, and the first loosening gas import and the bottom end of first feed pipe are oppositely arranged, institute
It states and is connected with the first loosening feed channel in the first loosening gas import, described first, which loosens feed channel, is equipped with the first loosening valve；Institute
It states the first loosening gas import to the horizontal feed back pipe between the end socket and is equipped with discharge port, the discharge port to described the
The one first level feed back pipe loosened between gas import is equipped with butterfly valve；The discharge port is connected with by pipeline to be tilted back
The lower end of expects pipe, the inclination feed back pipe is connected to the return port of the fluidized bed；
The second level feeding back device includes the second feed pipe being vertically arranged, the top of second feed pipe and described two
The second dipleg connection of grade cyclone separator, the bottom end of second feed pipe is connected with the described second horizontal feed back pipe, described
Second horizontal feed back pipe is equipped with inlet for fluidization air far from one end of the first level feed back pipe, connects in the inlet for fluidization air
There is fluidisation feed channel, the fluidisation feed channel is equipped with fluidizing valve；The side wall of the second horizontal feed back pipe is equipped with the second pine
It takes offence import, the second loosening gas import and the bottom end of second feed pipe are oppositely arranged, the second loosening gas import
On be connected with the second loosening feed channel, described second, which loosens feed channel, is equipped with second and loosens valve.
Further, the butterfly valve includes valve plate, is equipped with non-circular through-hole along centerline direction in the inside of the valve plate,
Valve rod is inserted in the non-circular through-hole, the valve rod is matched with the non-circular through-hole；It is returned in the first level
The side wall of expects pipe is equipped with valve rod groove, and the bottom end of the valve rod passes through the non-circular through-hole and is inserted in the valve rod groove,
The top of the valve rod sequentially passes through the side wall of the non-circular through-hole and the first level feed back pipe, is placed in first water
The outside of flat feed back pipe.
Further, it is detachably connected between the first level feed back pipe and the end socket.
Further, the upper end of the inclination feed back pipe is equipped with purge gass import, and the purge gass import is connected with purging
Feed channel, the purging feed channel are equipped with blow down valve.
Further, it is equipped with first pressure gauge on the top of first dipleg, is equipped in the lower part of first dipleg
Second pressure gauge；It is equipped with third pressure gauge on the top of second dipleg, is equipped with the 4th pressure in the lower part of second dipleg
Power table；It is equipped with the 5th pressure gauge in the lower part of the fluidized bed, the 5th pressure gauge and the return port are located at sustained height,
The 6th pressure gauge is equipped in the fluidized bed gas outlet of the fluidized bed.
Second mesh of the invention is implemented by following technical solution: fluidized bed second level whirlwind feed back control method comprising
Following steps: (1) baker, (2) fluidized bed start to feed intake to form solid material envelope, (3) whirlwind feed back；Wherein,
(1) baker: opened butterfly valve closes fluidizing valve, the first loosening valve, the second loosening valve and blow down valve, fluidized bed and drives
Heating, hot gas a part in the fluidized bed are drawn from the return port of the fluidized bed, sequentially enter inclination feed back pipe, the
One horizontal feed back pipe, the first feed pipe, the first dipleg, the body interior of primary cyclone and the second horizontal feed back pipe,
The body interior of two feed pipes, the second dipleg, secondary cyclone, another part go out from the fluidized bed at the top of the fluidized bed
Port is discharged into the body interior of the primary cyclone and the body interior of the secondary cyclone, last heat
Gas is drawn from the whirlwind gas outlet of two cyclone separator enters rear system, completes baker；
(2) fluidized bed starts to feed intake to form solid material envelope: after completing baker, closing the butterfly valve, the fluidized bed starts
Feed intake operation, and raw gas is discharged into the body interior of the primary cyclone from the fluidized bed gas outlet, and described one
Grade cyclone separator traps material, and the material of trapping is gathered in first dipleg, first feed pipe, the first level
In feed back pipe；It is drawn with the raw gas after material initial gross separation from the gas outlet of the primary cyclone and enters the second level
Cyclone separator, the secondary cyclone further trap material, and the material of trapping is gathered in second dipleg, described
In second feed pipe, the second horizontal feed back pipe；In system operation, the pressure of each pressure gauge real-time detection corresponding site
Force value, wherein the measured value of first pressure gauge is P1, and the measured value of second pressure gauge is P2, and the measured value of third pressure gauge is
P3, the measured value of the 4th pressure gauge are P4, and the measured value of the 5th pressure gauge is P5, and the measured value of the 6th pressure gauge is P6, when
(P5-P1) > (P5-P6) when, the butterfly valve is opened, material stays cool, and forms solid material envelope；
(3) feed back:
(1) it fluidizes feed back: after (P5-P1)-(P5-P6) > a and (P5-P3)-(P5-P6) > a, opening described first
It loosens valve and described second and loosens valve, loosen the material accumulated in first dipleg and second dipleg；After material loosens,
It closes described first and loosens valve and the second loosening valve, open the fluidizing valve, material is fluidized air-blowing trend discharge port fortune
It is dynamic, the inclination feed back pipe is entered by discharge port, is finally returned to the fluidized bed, wherein a is 10kPa-30kPa；
(2) dipleg build up of material: with the progress of feed back process, the pressure difference (P2-P1) of first dipleg and described
The pressure difference (P4-P3) of two diplegs fluctuates in 0-30KPa respectively, as (P5-P1)=(P5-P6) or (P5-P3)=(P5-P6)
When, the fluidizing valve is closed, the material in first dipleg and second dipleg continues to accumulate, as (P5-P1)-(P5-
P6 after) > a and (P5-P3)-(P5-P6) > a, step (1) operation is repeated, so circulation completes feed back.
Further, when feed back, if the pressure difference (P4- of the pressure difference (P2-P1) of first dipleg and second dipleg
P3 it) does not fluctuate, increases always, then tune up the fluidizing valve and open the blow down valve, increase discharge pressure and guarantee that feed back is normal.
Further, after tuning up the fluidizing valve and opening the blow down valve, if the pressure difference (P2- of first dipleg
P1 it) does not fluctuate still, increases always, then close the fluidizing valve, open described first and loosen valve, to the object in first dipleg
Material is loosened；
After tuning up the fluidizing valve and opening the blow down valve, if the pressure difference (P4-P3) of second dipleg still not wave
It is dynamic, increase always, then close the fluidizing valve, open described second and loosen valve, pine is carried out to the material in second dipleg
It is dynamic.
Further, the butterfly valve includes valve plate, is equipped with non-circular through-hole along centerline direction in the inside of the valve plate,
Valve rod is inserted in the non-circular through-hole, the valve rod is matched with the non-circular through-hole；It is returned in the first level
The side wall of expects pipe is equipped with valve rod groove, and the bottom end of the valve rod passes through the non-circular through-hole and is inserted in the valve rod groove,
The top of the valve rod sequentially passes through the side wall of the non-circular through-hole and the first level feed back pipe, is placed in first water
The outside of flat feed back pipe.
Advantages of the present invention: 1, during the heating of fluidized bed baker, after opened butterfly valve, hot gas can rapidly enter level-one rotation
Wind separator and secondary cyclone realize the heating synchronous with fluidized bed of primary cyclone, secondary cyclone,
Avoid fluidized bed feed intake acutely heated up after operation inside the first dipleg and the second dipleg caused by coating shedding；2, by butterfly valve with
Right angle pipeline is used cooperatively, and using the angle of repose of solid particle, the accumulation angle of the solid particle in the first feed pipe reaches peace
After ceasing angle, stop moving into first level feed back pipe；The accumulation angle of solid particle in second feed pipe reaches angle of repose
Afterwards, stop moving into the second horizontal feed back pipe, reduce the operating pressure of butterfly valve, reduce the rate of wear of butterfly valve, extend
The service life of butterfly valve；3, butterfly valve is only made of valve plate and valve rod, and structure is simple, and first level feed back pipe is close to butterfly valve
One end be equipped with dismountable end socket, valve plate damage after, it is readily replaceable；4, the upper end for tilting feed back pipe is equipped with purge gass import,
The certain power of furnace material can be returned in inclination feed back pipe by purge gass, it is made to can smoothly enter into fluidized bed；5, one cyclonic
Separator and secondary cyclone cooperation can be such that raw gas separates with solid particle more thorough.
Detailed description of the invention:
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the valve board structure schematic diagram of butterfly valve.
Primary cyclone 1, secondary cyclone 2, the first feed pipe 3, the first dipleg 1-1, first pressure gauge 4,
Second pressure gauge 5, fluidized bed 6, first level feed back pipe 7, fluidized bed gas outlet 8, end socket 9, the second horizontal feed back pipe 10, first
Gas import 7-1 is loosened, first loosens valve 7-2, discharge port 7-3, and butterfly valve 11 tilts feed back pipe 12, the second feed pipe 13, the second material
Leg 2-1, third pressure gauge 14, the 4th pressure gauge 15, inlet for fluidization air 10-1, fluidizing valve 10-2, second loosens gas import 10-3,
Second loosens valve 10-4, and valve plate 11-1, non-circular through-hole 11-2, valve rod 11-3, valve rod groove 7-4, purge gass import 12-1 are purged
Valve 12-2, the 5th pressure gauge 16, the 6th pressure gauge 17, return port 18.
Specific embodiment:
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
As shown in Figs. 1-2, fluidized bed second level whirlwind feeding back device comprising feeding back device, primary cyclone 1 and two
Grade cyclone separator 2, feeding back device includes level-one feeding back device and second level feeding back device；
Level-one feeding back device includes the first feed pipe 3 being vertically arranged, and the top of the first feed pipe 3 is separated with one cyclonic
First dipleg 1-1 of device 1 is connected to, and the top of the first dipleg 1-1 is equipped with first pressure gauge 4, and the lower part of the first dipleg 1-1 is equipped with the
Two pressure gauges 5；The bottom end of first feed pipe 3 is connected with first level feed back pipe 7, the first feed pipe 3 and first level feed back pipe 7
Connection；First level feed back pipe 7 has end socket 9 by flanged joint close to one end of fluidized bed 6, and first level feed back pipe 7 is separate
One end of fluidized bed 6 is connected with the second horizontal feed back pipe 10；The side wall of first level feed back pipe 7 is equipped with first and loosens gas import
7-1, the first loosening gas import 7-1 and the bottom end of the first feed pipe 3 are oppositely arranged, and first loosens and be connected with the on gas import 7-1
One loosens feed channel, and first, which loosens feed channel, is equipped with the first loosening valve 7-2；First loosens gas import 7-1 between end socket 9
Horizontal feed back pipe is equipped with discharge port 7-3, and discharge port 7-3 to first loosens on the first level feed back pipe 7 between gas import 7-1
Equipped with butterfly valve 11；Discharge port 7-3 by pipeline be connected with inclination feed back pipe 12, inclination feed back pipe 12 upper end be equipped with purge gass into
Mouth 12-1, purge gass import 12-1 are connected with purging feed channel, and purging feed channel is equipped with blow down valve 12-2, tilts feed back pipe 12
Lower end be connected to the return port 18 of fluidized bed 6；The lower part of fluidized bed 6 be equipped with the 5th pressure gauge 16, the 5th pressure gauge 16 with return
Material mouth 18 is located at sustained height, is equipped with the 6th pressure gauge 17 in the fluidized bed gas outlet 8 of fluidized bed 6.
Second level feeding back device includes the second feed pipe 13 being vertically arranged, the top of the second feed pipe 13 and second level whirlwind point
The second dipleg 2-1 connection from device 2, the top of the second dipleg 2-1 are equipped with third pressure gauge 14, and the lower part of the second dipleg 2-1 is set
There is the 4th pressure gauge 15, the bottom end of the second feed pipe 13 is connected with the second horizontal feed back pipe 10, and the second horizontal feed back pipe 10 is separate
One end of first level feed back pipe 7 is equipped with inlet for fluidization air 10-1, is connected with fluidisation feed channel on inlet for fluidization air 10-1, fluidizes
Feed channel is equipped with fluidizing valve 10-2；The side wall of second horizontal feed back pipe 10 is equipped with second and loosens gas import 10-3, the second pine
It takes offence import 10-3 and the bottom end of the second feed pipe 13 is oppositely arranged, be connected with the second loosening gas on the second loosening gas import 10-3
Pipeline, second, which loosens feed channel, is equipped with the second loosening valve 10-4；
Butterfly valve 11 includes valve plate 11-1, is equipped with non-circular through-hole 11-2 along centerline direction in the inside of valve plate 11-1,
Valve rod 11-3 is inserted in non-circular through-hole 11-2, valve rod 11-3 is matched with non-circular through-hole 11-2；In first level feed back
The side wall of pipe 7 is equipped with valve rod groove 7-4, and the bottom end of valve rod 11-3 passes through non-circular through-hole 11-2 and is inserted in valve rod groove 7-4,
The top of valve rod 11-3 sequentially passes through the side wall of non-circular through-hole 11-2 and first level feed back pipe 7, is placed in first level feed back
The outside of pipe 7.The structure of butterfly valve 11 is simple, and after damage, the end socket 9 of openable 7 end of first level feed back pipe replaces butterfly valve
11, it is easy to operate.
Embodiment 2:
The fluidized bed second level whirlwind feed back controlling party carried out using the fluidized bed second level whirlwind feeding back device in embodiment 1
Method comprising following steps: (1) baker, (2) fluidized bed start to feed intake to form solid material envelope, (3) whirlwind feed back；Wherein,
(1) baker: opened butterfly valve 11 closes fluidizing valve 10-2, the first loosening valve 7-2, the second loosening valve 10-4 and purging
Valve 12-2, fluidized bed 6 are driven heating, and hot gas a part in fluidized bed 6 is drawn from the return port 18 of fluidized bed 6, successively into
Enter to tilt the main body of feed back pipe 12, first level feed back pipe 7, the first feed pipe 3, the first dipleg 1-1, primary cyclone 1
The body interior of internal and the second horizontal feed back pipe 10, the second feed pipe 13, the second dipleg 2-1, secondary cyclone 2, separately
A part is discharged into the body interior and second level whirlwind of primary cyclone 1 from the fluidized bed gas outlet 8 at 6 top of fluidized bed
The body interior of separator 2, last hot gas is drawn from the whirlwind gas outlet of two cyclone separators enters rear system, completes to dry
Furnace；It realizes that primary cyclone 1, secondary cyclone 2 are synchronous with fluidized bed 6 to heat up, avoids fluidized bed 6 and feed intake fortune
Coating shedding caused by acutely heating up inside the first dipleg 1-1 and the second dipleg 2-1 after row；
(2) fluidized bed starts to feed intake to form solid material envelope: after completing baker, closing butterfly valve 11, fluidized bed 6 starts the fortune that feeds intake
Row, raw gas are discharged into the body interior of primary cyclone 1 from fluidized bed gas outlet 8, and primary cyclone 1 traps
Material, the material of trapping are gathered in the first dipleg 1-1, the first feed pipe 3, in first level feed back pipe 7；With material initial gross separation
Raw gas afterwards from the gas outlet of primary cyclone 1 draw enter secondary cyclone 2, secondary cyclone 2 into
One step traps material, and the material of trapping is gathered in the second dipleg 2-1, the second feed pipe 13, in the second horizontal feed back pipe 10；It is being
In system operational process, the pressure value of each pressure gauge real-time detection corresponding site, wherein the measured value of first pressure gauge 4 is P1, the
The measured value of two pressure gauges 5 is P2, and the measured value of third pressure gauge 14 is P3, and the measured value of the 4th pressure gauge 15 is P4, the 5th
The measured value of pressure gauge 16 is P5, and the measured value of the 6th pressure gauge 17 is P6, as (P5-P1) > (P5-P6), opened butterfly valve 11,
Material stays cool, and forms solid material envelope, reduces the operating pressure of butterfly valve 11, reduce the rate of wear of butterfly valve 11,
Extend the service life of butterfly valve 11；The gas in fluidized bed 6 is avoided simultaneously back through first level feed back pipe 7 and second
Horizontal feed back pipe 10 enters primary cyclone 1 and secondary cyclone 2, ensure that primary cyclone 1 and second level
Cyclone separator 2 can work normally
(3) feed back:
(1) it fluidizes feed back: after (P5-P1)-(P5-P6) > a and (P5-P3)-(P5-P6) > a, opening first and loosen
Valve 7-2 and second loosens valve 10-4, loosens the material accumulated in the first dipleg 1-1 and the second dipleg 2-1, closes first and loosens valve
7-2 and second opens fluidizing valve 10-2 after loosening valve 10-4, and material is fluidized air-blowing trend discharge port 7-3 movement, passes through discharging
Mouth 7-3 enters inclination feed back pipe 12, finally returns to fluidized bed 6；Wherein, the value of a 10kPa-30kPa, a are by fluidized bed 6
Bed height determine that bed height is higher, and the value of a is bigger, the value of a is up to 30kPa, and in the present embodiment, a is
30kPa
(2) dipleg build up of material: with the progress of feed back process, the pressure difference (P2-P1) of the first dipleg 1-1 and the second material
The pressure difference (P4-P3) of leg 2-1 fluctuates in 0-30KPa respectively, as (P5-P1)=(P5-P6) or (P5-P3)=(P5-P6),
Close fluidizing valve 10-2, the material in the first dipleg 1-1 and the second dipleg 2-1 continues to accumulate, when (P5-P1)-(P5-P6) > a simultaneously
And after (P5-P3)-(P5-P6) > a, step (1) operation is repeated, so circulation completes feed back.
When feed back, when the pressure difference (P2-P1) of the first dipleg 1-1 and the pressure difference (P4-P3) of the second dipleg 2-1 do not fluctuate, one
It when straight increase, tunes up fluidizing valve 10-2 and opens blow down valve 12-2, increase discharge pressure and guarantee that feed back is normal.
After tuning up fluidizing valve 10-2 and opening blow down valve 12-2, if the pressure difference (P2-P1) of the first dipleg 1-1 still not wave
It is dynamic, increase always, then close fluidizing valve 10-2, opens first and loosen valve 7-2, the material in the first dipleg 1-1 is loosened；
After tuning up fluidizing valve 10-2 and opening blow down valve 12-2, if the pressure difference (P4-P3) of the second dipleg 2-1 still not wave
It is dynamic, increase always, then close fluidizing valve 10-2, open second and loosen valve 10-4, pine is carried out to the material in the second dipleg 2-1
It is dynamic.
Butterfly valve 11 is only made of valve plate 11-1 and valve rod 11-3, and structure is simple, and first level feed back pipe 7 is close to butterfly valve
11 one end is equipped with dismountable end socket 9, convenient for taking out valve plate 11-1；After valve plate 11-1 uses abrasion for a long time, by valve rod 11-
3 extract out from non-circular through-hole 11-2, open end socket 9, take out the valve plate 11-1 of damage and replace, fix end socket 9, just complete
The replacement of valve plate 11-1.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. fluidized bed second level whirlwind feeding back device, which is characterized in that it includes feeding back device, primary cyclone and second level rotation
Wind separator, the feeding back device include level-one feeding back device and second level feeding back device；
The level-one feeding back device includes the first feed pipe being vertically arranged, and the top of first feed pipe and the level-one are revolved
First dipleg of wind separator is connected to, and the bottom end of first feed pipe is connected with first level feed back pipe, first charging
Pipe is connected to the first level feed back pipe；The first level feed back pipe is equipped with end socket close to one end of fluidized bed, and described the
One horizontal feed back pipe is connected with the second horizontal feed back pipe far from one end of the fluidized bed；The side wall of the first level feed back pipe
It being equipped with first and loosens gas import, the first loosening gas import and the bottom end of first feed pipe are oppositely arranged, and described the
The first loosening feed channel is connected in one loosening gas import, described first, which loosens feed channel, is equipped with the first loosening valve；Described
One, which loosens gas import to the horizontal feed back pipe between the end socket, is equipped with discharge port, the discharge port to first pine
The first level feed back pipe taken offence between import is equipped with butterfly valve；The discharge port is connected with inclination feed back by pipeline
The lower end of pipe, the inclination feed back pipe is connected to the return port of the fluidized bed；
The second level feeding back device includes the second feed pipe being vertically arranged, and the top of second feed pipe and the second level are revolved
Second dipleg of wind separator is connected to, and the bottom end of second feed pipe is connected with the described second horizontal feed back pipe, and described second
Horizontal feed back pipe is equipped with inlet for fluidization air far from one end of the first level feed back pipe, is connected with stream in the inlet for fluidization air
Change feed channel, the fluidisation feed channel is equipped with fluidizing valve；The side wall of the second horizontal feed back pipe is equipped with second and loosens gas
Import, the second loosening gas import and the bottom end of second feed pipe are oppositely arranged, and are connected in the second loosening gas import
It is connected to the second loosening feed channel, described second, which loosens feed channel, is equipped with the second loosening valve.
2. fluidized bed second level whirlwind feeding back device according to claim 1, which is characterized in that the butterfly valve includes valve plate,
It is equipped with non-circular through-hole along centerline direction in the inside of the valve plate, is inserted with valve rod in the non-circular through-hole, it is described
Valve rod is matched with the non-circular through-hole；Valve rod groove is equipped on the side wall of the first level feed back pipe, the valve rod
Bottom end passes through the non-circular through-hole and is inserted in the valve rod groove, and the top of the valve rod sequentially passes through described non-circular logical
The side wall in hole and the first level feed back pipe is placed in the outside of the first level feed back pipe.
3. fluidized bed second level whirlwind feeding back device according to claim 1 or 2, which is characterized in that the first level is returned
It is detachably connected between expects pipe and the end socket.
4. fluidized bed second level whirlwind feeding back device according to claim 1 or 2, which is characterized in that the inclination feed back pipe
Upper end be equipped with purge gass import, the purge gass import is connected with purging feed channel, and the purging feed channel, which is equipped with, to be purged
Valve.
5. fluidized bed whirlwind feeding back device according to claim 1 or 2, which is characterized in that in the upper of first dipleg
Portion is equipped with first pressure gauge, is equipped with second pressure gauge in the lower part of first dipleg；It is equipped on the top of second dipleg
Third pressure gauge is equipped with the 4th pressure gauge in the lower part of second dipleg；The 5th pressure is equipped in the lower part of the fluidized bed
Table, the 5th pressure gauge and the return port are located at sustained height, are equipped with the 6th in the fluidized bed gas outlet of the fluidized bed
Pressure gauge.
6. fluidized bed second level whirlwind feed back control method, which is characterized in that it includes the following steps: (1) baker, (2) fluidized bed
Start to feed intake to form solid material envelope, (3) whirlwind feed back；Wherein,
(1) baker: opened butterfly valve closes fluidizing valve, the first loosening valve, the second loosening valve and blow down valve, fluidized bed and drives to heat up,
Hot gas a part in the fluidized bed is drawn from the return port of the fluidized bed, sequentially enters inclination feed back pipe, the first water
Flat feed back pipe, the first feed pipe, the first dipleg, the body interior of primary cyclone and the second horizontal feed back pipe, second into
The body interior of expects pipe, the second dipleg, secondary cyclone, another part is from the fluidized bed gas outlet at the top of the fluidized bed
It is discharged into the body interior of the primary cyclone and the body interior of the secondary cyclone, last hot gas
It is drawn from the whirlwind gas outlet of two cyclone separator and enters rear system, complete baker；
(2) fluidized bed starts to feed intake to form solid material envelope: after completing baker, closing the butterfly valve, the fluidized bed starts to feed intake
Operation, raw gas are discharged into the body interior of the primary cyclone, the level-one rotation from the fluidized bed gas outlet
Wind separator traps material, and the material of trapping is gathered in first dipleg, first feed pipe, the first level feed back
Guan Zhong；It is drawn with the raw gas after material initial gross separation from the gas outlet of the primary cyclone and enters the second level whirlwind
Separator, the secondary cyclone further trap material, and the material of trapping is gathered in second dipleg, described second
In feed pipe, the second horizontal feed back pipe；In system operation, the pressure of each pressure gauge real-time detection corresponding site
Value, wherein the measured value of first pressure gauge is P1, and the measured value of second pressure gauge is P2, and the measured value of third pressure gauge is P3,
The measured value of 4th pressure gauge is P4, and the measured value of the 5th pressure gauge is P5, and the measured value of the 6th pressure gauge is P6, as (P5-
When P1) > (P5-P6), the butterfly valve is opened, material stays cool, and forms solid material envelope；
(3) feed back:
(1) it fluidizes feed back: after (P5-P1)-(P5-P6) > a and (P5-P3)-(P5-P6) > a, opening described first and loosen
Valve and described second loosens valve, loosens the material accumulated in first dipleg and second dipleg；After material loosens, close
Described first, which loosens valve and described second, loosens valve, opens the fluidizing valve, material is fluidized the movement of air-blowing trend discharge port, leads to
The discharge port is crossed into the inclination feed back pipe, is finally returned to the fluidized bed, wherein a is 10kPa-30kPa；
(2) dipleg build up of material: with the progress of feed back process, the pressure difference (P2-P1) and second material of first dipleg
The pressure difference (P4-P3) of leg fluctuates in 0-30KPa respectively, as (P5-P1)=(P5-P6) or (P5-P3)=(P5-P6), closes
Close the fluidizing valve, the material in first dipleg and second dipleg continues to accumulate, when (P5-P1)-(P5-P6) > a simultaneously
And after (P5-P3)-(P5-P6) > a, step (1) operation is repeated, so circulation completes feed back.
7. fluidized bed second level whirlwind feed back control method according to claim 6, which is characterized in that when feed back, if institute
The pressure difference (P4-P3) of the pressure difference (P2-P1) and second dipleg of stating the first dipleg does not fluctuate, and increases always, then tunes up described
Fluidizing valve simultaneously opens the blow down valve, increases discharge pressure and guarantees that feed back is normal.
8. fluidized bed second level whirlwind feed back control method according to claim 7, which is characterized in that tune up the fluidizing valve
And after opening the blow down valve, if the pressure difference (P2-P1) of first dipleg does not fluctuate still, increase always, then described in closing
Fluidizing valve opens described first and loosens valve, loosens to the material in first dipleg；
After tuning up the fluidizing valve and opening the blow down valve, if the pressure difference (P4-P3) of second dipleg does not fluctuate still, one
It is straight to increase, then the fluidizing valve is closed, described second is opened and loosens valve, the material in second dipleg is loosened.
9. fluidized bed second level whirlwind feed back control method according to claim 6, which is characterized in that the butterfly valve includes valve
Plate is equipped with non-circular through-hole along centerline direction in the inside of the valve plate, is inserted with valve rod in the non-circular through-hole, institute
Valve rod is stated to match with the non-circular through-hole；Valve rod groove, the valve rod are equipped on the side wall of the first level feed back pipe
Bottom end pass through and the non-circular through-hole and be inserted in the valve rod groove, the top of the valve rod sequentially passes through described non-circular
The side wall of through-hole and the first level feed back pipe is placed in the outside of the first level feed back pipe.
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| CN110056866B (en) | 2024-02-09 |
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