CN109708083A - Reduce the method and waste heat boiler of the attached waste heat boiler abrasion of fluidized bed coal gasification - Google Patents
Reduce the method and waste heat boiler of the attached waste heat boiler abrasion of fluidized bed coal gasification Download PDFInfo
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- CN109708083A CN109708083A CN201910064392.0A CN201910064392A CN109708083A CN 109708083 A CN109708083 A CN 109708083A CN 201910064392 A CN201910064392 A CN 201910064392A CN 109708083 A CN109708083 A CN 109708083A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The present invention relates to the methods and waste heat boiler of a kind of attached waste heat boiler abrasion of reduction fluidized bed coal gasification, wherein method includes carrying out separation to the high temperature dust coal gas of gasification furnace discharge to obtain coal gas of high temperature and high temperature coal dust, and coal gas of high temperature and high temperature coal dust are then directed respectively into waste heat boiler and carry out waste heat recycling.And waste heat boiler includes closed cylinder, inner barrel is disposed with swirl cylinder and several evaporators from the top down, feed pipe is connected on cylinder, the barrel that feed pipe passes through cylinder is docked with the feed inlet of swirl cylinder, cylinder body bottom offers gas exit, it is connected with escape pipe on gas exit, the dipleg of the swirl cylinder lower end, which sequentially passes through to be pierced by outside cylinder after each evaporator, forms discharge port.Coal dust is preferentially removed by swirl cylinder, can eliminate abrasion of the dust-laden coal gas to waste heat boiler heating surface substantially, and the gas speed of so each evaporator heating surface of waste heat boiler opposite can improve 10%~50%, and recuperation of heat effect can be improved 10%~40%.
Description
Technical field:
The invention belongs to Coal Gasification Technology fields, and in particular to a kind of attached waste heat boiler abrasion of reduction fluidized bed coal gasification
Method and waste heat boiler.
Background technique:
Fluidized bed coal gasification system includes the subsystems such as coal, deslagging, high-temp. vortex and waste heat boiler, wherein waste heat pot
The effect of furnace is to reduce gas temperature to downstream filter acceptable temperature, while gas recovery sensible heat generates valuable
Superheated steam, improve the thermal efficiency of entire gasification system, therefore waste heat boiler is the indispensable subsystem of fluidized bed coal gasification system
System.But fluidized bed coal gas dust content is much higher than bed gas and air flow bed coal gas, and attached waste heat boiler abrasion, dust stratification are rotten
The problems such as erosion, is always than more serious so that the service life of the attached waste heat boiler of fluidized bed coal gasification is short, production cost, maintenance at
Originally it can not have always been high any more.
Summary of the invention:
Present invention technical problems to be solved first are: providing a kind of attached waste heat boiler abrasion of reduction fluidized bed coal gasification
Method.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: improve the attached waste heat pot of fluidized bed coal gasification
The anti abrasive method of furnace, which is characterized in that including having step as follows:
A, to the dust-laden coal gas of high temperature being discharged from the attached high-temp. vortex of gasification furnace carry out secondary separation obtain coal gas of high temperature and
Then coal gas of high temperature is sent into waste heat boiler and carries out waste heat recycling by high temperature coal dust；
B, the resulting high temperature coal dust of step a dedusting is imported into waste heat boiler using pipe special, carries out waste heat recycling.
As a preferred embodiment, the high temperature dust coal gas or flue gas gasification furnace being discharged using swirl cylinder are dusted,
In the waste heat boiler by swirl cylinder setting.
As a preferred embodiment, swirl cylinder is arranged at the top of waste heat boiler, downwards successively by swirl cylinder lower end dipleg
Each evaporator, superheater and economizer in waste heat boiler carry out waste heat recycling, and dipleg lower end is pierced by outside waste heat boiler
Coal dust is sent out and is recycled by wall.
The beneficial effects of the present invention are: coal dust is preferentially removed by swirl cylinder, dust-laden coal gas can be eliminated substantially to waste heat pot
The gas speed of the abrasion of furnace heating surface, so each evaporator heating surface of waste heat boiler opposite can improve 10%~50%, heat
Recovering effect can be improved 10%~40%.
Further, by the way that swirl cylinder to be arranged in the waste heat boiler, and dipleg is sequentially passed through in waste heat boiler downwards
Each evaporator carries out waste heat recycling, cools down coal gas simultaneously with coal dust, avoids high temperature coal dust from building bridge and assembles blocking dipleg, thus
Ensure that the smooth downstream transport of coal dust is recycled.
The further technical problems to be solved of the present invention are: providing a kind of attached waste heat boiler mill of reduction fluidized bed coal gasification
The waste heat boiler of damage.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: waste heat boiler, including closed cylinder,
Inner barrel is disposed with swirl cylinder and several evaporators from the top down, and feed pipe is connected on cylinder, and feed pipe passes through cylinder
The barrel of body is docked with the feed inlet of swirl cylinder, and cylinder body bottom offers gas exit, and escape pipe, institute are connected on gas exit
The dipleg for stating swirl cylinder lower end, which sequentially passes through to be pierced by after each evaporator outside cylinder, forms discharge port, and swirl cylinder upper end is provided with outlet
Mouthful.
The upper seal that swirl cylinder is located at feed inlet is socketed with one piece of annular upper sealing partition, and swirl cylinder is located at feed inlet
Lower section sealing be socketed with one piece of annular lower sealing partition, the periphery of upper sealing partition and lower sealing partition is respectively and in cylinder
The connection of wall circumferential seal, upper sealing partition and lower sealing partition are immunity plate, can bear expanding with heat and contract with cold for swirl cylinder driving and parking,
Swirl cylinder surrounding is circumferentially discrete to be disposed with several communicating pipes, pass through communicating pipe upper sealing partition and lower sealing partition and with it is upper close
Packing plate is connected with lower sealing bulkhead seal, and the gas outlet is located above upper sealing partition.
The evaporator is shell and tube evaporator, and the dipleg passes through the shell side of evaporator.
It is additionally provided with superheater in the cylinder, which is provided immediately on the lower section of the top evaporator, the mistake
Hot device is horizontal tube coil group, and the dipleg passes through superheater.
It is additionally provided with economizer in the cylinder, which is located at cylinder body bottom, gas exit top, the economizer
For horizontal tube coil group, the dipleg passes through economizer.
The beneficial effects of the present invention are: making the coal dust in coal gas pass through eddy flow by the way that swirl cylinder is arranged in the waste heat boiler
The preferential removing of cylinder, can eliminate abrasion of the dust-laden coal gas to waste heat boiler heating surface, so each evaporation of waste heat boiler substantially in this way
The gas speed of device heating surface opposite can improve 10%~50%, and recuperation of heat effect can be improved 10%~40%.
And the dipleg of swirl cylinder sequentially pass through downwards each evaporator in waste heat boiler carry out waste heat recycling, make coal gas with
Coal dust is cooling simultaneously, avoids high temperature coal dust from building bridge and assembles blocking dipleg, so that it is guaranteed that the smooth downstream transport of coal dust is recycled.
The present invention passes through the upper and lower sealing partition of setting further dust-laden coal gas and swirl cylinder extraneous gas is isolated, and
Using immunity plate as upper and lower sealing partition, expanding with heat and contract with cold for swirl cylinder driving and parking can be born by making to seal partition above and below, raising
The connective stability of upper and lower sealing partition and swirl cylinder.
The present invention further by the way that dipleg to be passed through to the shell side of evaporator, makes the cooling in dipleg outer wall and evaporator shell side
Water directly contacts, and carries out waste heat recycling to dipleg and its interior coal dust, quickly reduces coal dust temperature, prevent coal dust from building bridge, it is ensured that
Coal dust is smoothly discharged from dipleg lower end.
The present invention further by the way that dipleg is passed through superheater and economizer, further to dipleg and its interior coal dust into
The recycling of row waste heat, improves waste heat recovery efficiency.
Detailed description of the invention:
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is the working principle of the invention figure；
Fig. 2 is structural schematic diagram of the invention.
In Fig. 1, Fig. 2: 1, cylinder, 2, swirl cylinder, 2-1, dipleg, 3, evaporator, 4, feed pipe, 5, gas exit, 6, go out
Tracheae, 7, discharge port, 8, feed inlet, 9, upper sealing partition, 10, lower sealing partition, 11, communicating pipe, 12, superheater, 13, province's coal
Device, 14, gas outlet, 15, cooling air inlet, 16, cooling air outlet, 17, level-one evaporator shell side import, 18, level-one evaporator
Shell-side outlet.
Specific embodiment:
With reference to the accompanying drawing, detailed description of the present invention specific embodiment.
Referring to figs. 1 and 2, the anti abrasive method of the attached waste heat boiler of raising fluidized bed coal gasification of the present invention,
Including having step as follows:
A, secondary separation is carried out to the high temperature dust coal gas being discharged from the attached high-temp. vortex of gasification furnace using swirl cylinder 2 to obtain
Then coal gas of high temperature is sent into waste heat boiler and carries out waste heat recycling by coal gas of high temperature and high temperature coal dust；
B, the resulting high temperature coal dust of step a dedusting is imported into waste heat boiler using pipe special, carries out waste heat recycling.
Wherein, the swirl cylinder 2 in step b is arranged in the waste heat boiler, and is located at the top of waste heat boiler, will be under swirl cylinder 2
The dipleg 2-1 at end makes it sequentially pass through each evaporator 3 in waste heat boiler downwards and carries out waste heat recycling as pipe special,
The lower end dipleg 2-1 is pierced by waste heat boiler outer wall, and coal dust is sent out and is recycled.
Coal dust is preferentially removed by swirl cylinder 2, can eliminate abrasion of the dust-laden coal gas to waste heat boiler heating surface substantially, in this way
The gas speed of each 3 heating surface of evaporator of waste heat boiler opposite can improve 10%~50%, and recuperation of heat effect can be improved 10%
~40%.
Further, by the way that swirl cylinder 2 to be arranged in the waste heat boiler, and dipleg 3-1 is sequentially passed through into downwards waste heat boiler
Interior each evaporator 3 carries out waste heat recycling, cools down coal gas simultaneously with coal dust, avoids high temperature coal dust from building bridge and assembles blocking dipleg
2-1, so that it is guaranteed that the smooth downstream transport of coal dust is recycled.
As shown in Fig. 2, waste heat boiler is disposed with swirl cylinder 2 inside cylinder 1 including closed cylinder 1 from the top down
With two evaporators 3, feed pipe 4 is connected on cylinder 1, the feed inlet 8 that feed pipe 4 passes through the barrel and swirl cylinder 2 of cylinder 1 is right
It connects, 1 bottom of cylinder offers gas exit 5, and escape pipe 6, the dipleg 2-1 of 2 lower end of swirl cylinder are connected on gas exit 5
It is pierced by formation discharge port 7 outside cylinder 1 after sequentially passing through each evaporator 3,2 upper end of swirl cylinder is provided with gas outlet 14.
By the way that swirl cylinder 2 is arranged in the waste heat boiler, remove the coal dust in coal gas preferentially by swirl cylinder 2, such base
Originally abrasion of the dust-laden coal gas to waste heat boiler heating surface, the Gas Flow of so each 3 heating surface of evaporator of waste heat boiler can be eliminated
Speed opposite can improve 10%~50%, and recuperation of heat effect can be improved 10%~40%.
And the dipleg 2-1 of swirl cylinder 2 sequentially passes through downwards each evaporator 3 in waste heat boiler and carries out waste heat recycling, makes
Coal gas cools down simultaneously with coal dust, avoids high temperature coal dust from building bridge and assembles blocking dipleg 2-1, so that it is guaranteed that the smooth downstream transport of coal dust
It is recycled.
The upper seal that swirl cylinder 2 is located at feed inlet 8 is socketed with one piece of annular upper sealing partition 9, swirl cylinder 2 be located at into
The lower section sealing of material mouth 8 is socketed with one piece of annular lower sealing partition 10, the periphery point of upper sealing partition 9 and lower sealing partition 10
It is not connect with 1 inner wall circumferential seal of cylinder, upper sealing partition 9 and lower sealing partition 10 are oar plate, and 2 surrounding of swirl cylinder is circumferential
It is discrete to be evenly equipped with three communicating pipe 11, pass through communicating pipe 11 upper sealing partition 9 and lower sealing partition 10 and with upper sealing partition 9 and
Lower sealing partition 10 is tightly connected, and the gas outlet 14 is located at upper 9 top of sealing partition.
The present invention, which further passes through, seals partition 9, lower sealing partition 10 to be isolated outside dust-laden coal gas and swirl cylinder 2 in setting
Portion's gas can open up the cooling that the confined space between upper sealing partition 9, lower sealing partition 10 is connected on cylinder 1 in this way
Air inlet 15 and cooling air outlet 16 form the circulation of air by cooling air inlet 15 and cooling air outlet 16 to reduce eddy flow
The temperature of 2 barrels of cylinder, and use oar plate as upper sealing partition 9, lower sealing partition 10, make sealing partition 9, it is lower seal every
Plate 10 can bear expanding with heat and contract with cold for 2 driving and parking of swirl cylinder, and the connection of partition 9, lower sealing partition 10 and swirl cylinder 2 is sealed in raising
Stability.
The evaporator 3 is shell and tube evaporator, and the dipleg 2-1 passes through the shell side of evaporator 3.Dipleg 2-1, which is passed through, to be steamed
The shell side for sending out device 3, contacts dipleg 2-1 outer wall directly with the cooling water in 3 shell side of evaporator, to dipleg 2-1 and its interior coal
Powder carries out waste heat recycling, quickly reduces coal dust temperature, improves the surface mobility of coal dust, prevent coal dust from building bridge, it is ensured that coal dust is suitable
Benefit is discharged from the lower end dipleg 2-1 discharge port 7.
It is additionally provided with superheater 12 in the cylinder 1, which is provided immediately on the lower section of the top evaporator 3,
The superheater 12 is horizontal tube coil group, and the dipleg 2-1 passes through superheater 12.
It is additionally provided with economizer 13 in the cylinder 1, which is located at 1 bottom of cylinder, 5 top of gas exit, institute
Stating economizer 13 is horizontal tube coil group, and the dipleg 2-1 passes through economizer 13.
The present invention further by the way that dipleg 2-1 is passed through superheater 12 and economizer 13, further to dipleg 2-1 and its
Interior coal dust carries out waste heat recycling, improves waste heat recovery efficiency.
The course of work of the invention is: as depicted in figs. 1 and 2, first by gasification furnace discharge high temperature dust coal gas from into
Expects pipe 4 is introduced in swirl cylinder 2 and is separated, and the coal gas after separation is from 2 discharge upwards of upper end gas outlet 14 of swirl cylinder, and coal dust is then
Swirl cylinder 2 is discharged downwards from the dipleg 2-1 of 2 lower end of swirl cylinder under the effect of gravity, after swirl cylinder 2 is discharged in coal gas upwards, through even
Siphunculus 11 is passed down through sealing partition 9 and lower sealing partition 10, enters back into the tube side close to the evaporator 3 of swirl cylinder 2, evaporates
It is filled with the water circulated in the shell side of device 3, the shell side import 17 being connected to 3 shell side of evaporator and shell are provided on cylinder 1
Journey outlet 18, recirculated water from shell side import 17 enter, from shell-side outlet 18 flow out, coal gas through the evaporator 3 for the first time cool down after, then
Heating is carried out to the steam in superheater 12 and completes secondary cooling, the progress of evaporator 3 for entering back into 12 lower section of superheater is cold three times
But it after, then by four coolings of progress of economizer 13, is finally discharged from gas exit 5, is produced and used for downstream.
And the high temperature coal dust being discharged from swirl cylinder 2, then along dipleg 2-1 successively pass through the shell side of evaporator 3, superheater 12,
Shell side, the economizer of evaporator 3 are discharged outside cylinder 1 from discharge port 7 after same progress multiple tracks is cooling and carry out recycling and reusing.
The principles and effects of the invention, and the embodiment that part uses only is illustrated in above-described embodiment,
And is not intended to limit the present invention；It should be pointed out that for those of ordinary skill in the art, not departing from the invention structure
Under the premise of think of, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.
Claims (8)
1. improving the anti abrasive method of the attached waste heat boiler of fluidized bed coal gasification, which comprises the steps of:
A, secondary separation is carried out to the high temperature dust coal gas being discharged from the attached high-temp. vortex of gasification furnace and obtains coal gas of high temperature and high temperature
Then coal gas of high temperature is sent into waste heat boiler and carries out waste heat recycling by coal dust；
B, the resulting high temperature coal dust of step a dedusting is imported into waste heat boiler using pipe special, carries out waste heat recycling.
2. the anti abrasive method of the attached waste heat boiler of raising fluidized bed coal gasification according to claim 1, which is characterized in that
The high temperature dust coal gas or flue gas that gasification furnace is discharged using swirl cylinder are dusted, in the waste heat boiler by swirl cylinder setting.
3. the anti abrasive method of the attached waste heat boiler of raising fluidized bed coal gasification according to claim 2, which is characterized in that
Swirl cylinder is arranged at the top of waste heat boiler, swirl cylinder lower end dipleg is sequentially passed through downwards to each evaporator in waste heat boiler
Waste heat recycling is carried out, dipleg lower end is pierced by waste heat boiler outer wall, and coal dust is sent out and is recycled.
4. based on the waste heat boiler of 1~3 the method for the claims, including closed cylinder (1), which is characterized in that cylinder
It is disposed with swirl cylinder (2) and several evaporators (3) from the top down inside body (1), feed pipe (4) are connected on cylinder (1),
The barrel that feed pipe (4) passes through cylinder (1) is docked with the feed inlet (8) of swirl cylinder (2), and cylinder (1) bottom offers coal gas and goes out
Mouthful (5) are connected with escape pipe (6) on gas exit (5), and the dipleg (2-1) of swirl cylinder (2) lower end sequentially passes through each evaporation
It is pierced by cylinder (1) after device (3) and forms discharge port (7) outside, swirl cylinder (2) upper end is provided with gas outlet (14).
5. waste heat boiler according to claim 4, which is characterized in that swirl cylinder (2) is located at the upper seal of feed inlet (8)
It is socketed with one piece of annular upper sealing partition (9), the lower section sealing that swirl cylinder (2) is located at feed inlet (8) is socketed with one piece of annular
Lower sealing partition (10), upper sealing partition (9) and lower sealing partition (10) it is peripheral respectively with cylinder (1) inner wall circumferential seal
Connection, upper sealing partition (9) and lower sealing partition (10) are oar plate, swirl cylinder (2) surrounding is circumferentially discrete be disposed with it is several
Root communicating pipe (11), pass through communicating pipe (11) upper sealing partition (9) and lower sealing partition (10) and with upper sealing partition (9) and under
It seals partition (10) to be tightly connected, the gas outlet (14) is located above upper sealing partition (9).
6. waste heat boiler according to claim 4, which is characterized in that the evaporator (3) is shell and tube evaporator, described
Dipleg (2-1) passes through the shell side of evaporator (3).
7. waste heat boiler according to claim 4, which is characterized in that superheater (12) are additionally provided in the cylinder (1),
The superheater (12) is provided immediately on the lower section of the top evaporator (3), and the superheater (12) is horizontal tube coil group, described
Dipleg (2-1) passes through superheater (12).
8. waste heat boiler according to claim 4, which is characterized in that economizer (13) are additionally provided in the cylinder (1),
The economizer (13) is located at cylinder (1) bottom, gas exit (5) top, and the economizer (13) is horizontal tube coil group, described
Dipleg (2-1) passes through economizer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064392.0A CN109708083A (en) | 2019-01-23 | 2019-01-23 | Reduce the method and waste heat boiler of the attached waste heat boiler abrasion of fluidized bed coal gasification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064392.0A CN109708083A (en) | 2019-01-23 | 2019-01-23 | Reduce the method and waste heat boiler of the attached waste heat boiler abrasion of fluidized bed coal gasification |
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| Publication Number | Publication Date |
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| CN109708083A true CN109708083A (en) | 2019-05-03 |
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ID=66262691
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| CN201910064392.0A Pending CN109708083A (en) | 2019-01-23 | 2019-01-23 | Reduce the method and waste heat boiler of the attached waste heat boiler abrasion of fluidized bed coal gasification |
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|---|---|---|---|---|
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2019
- 2019-01-23 CN CN201910064392.0A patent/CN109708083A/en active Pending
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| JP2001329272A (en) * | 2000-05-22 | 2001-11-27 | Babcock Hitachi Kk | Heat recovery boiler for coal gasification |
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