CN207294700U - A kind of four-way process burner structure for double-section dry coal powder pressure gasifying technology - Google Patents
A kind of four-way process burner structure for double-section dry coal powder pressure gasifying technology Download PDFInfo
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- CN207294700U CN207294700U CN201721179382.4U CN201721179382U CN207294700U CN 207294700 U CN207294700 U CN 207294700U CN 201721179382 U CN201721179382 U CN 201721179382U CN 207294700 U CN207294700 U CN 207294700U
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Abstract
The utility model discloses a kind of four-way process burner structure for double-section dry coal powder pressure gasifying technology; by center coal dust channel, the oxygen channel around center coal dust channel annular, outer layer coal dust channel, protection gas passage; outermost layer is cooling water outlet and inlet passage, and all passages are coaxially arranged as axis using burner center；By forming center coal dust channel in inner ring nozzle; inner ring nozzle and the first middle ring nozzle form oxygen channel; first middle ring nozzle and the second middle ring nozzle form outer layer coal dust channel; second middle ring nozzle and outer shroud nozzle form protection gas passage; outer shroud nozzle and inner side water-cooling jacket form cooling water intake tunnel, and inner side water-cooling jacket and outside water-cooling jacket form cooling water export passage；The utility model strengthens the mixing of coal dust and oxygen; improve coal dust and oxygen enters gasification furnace flow field, gasification furnace high-temperature region is more concentrated, while burner outermost layer protects coming into operation for gas; burner side towards the fire temperature is reduced, burner service life is substantially prolongs at the same time improving coal dust conversion ratio.
Description
Technical field
The utility model belongs to coal dust gasification and field of chemical equipment, and more particularly to a kind of double-section dry coal powder that is used for pressurizes
The four-way process burner structure of gasification technology.
Background technology
Entrained flow gasification is to utilize jet entrainment principle in hydrodynamics, by coal dust or coal slurry and gasifying agent (O2And water
Steam) sprayed into by nozzle at high speeds in gasification furnace, jet stream causes height volume to inhale and cause high intensity turbulent, so as to enhance gasification
The mixing of gas-particle two-phase and reaction process in stove, therefore be conducive to the abundant progress of gasification.Shell and Huaneng Group coal etc. gasify
Technique is a kind of bed pulverized coal gasification technology being most widely used at present, and gasification process is using oxygen as gasifying agent, dry-coal feeding, liquid
Deslagging, due to the application of water cooling wall technique, its operation temperature is high (up to 1400~1700 DEG C), due to the coal of airflow bed gasification furnace
Kind adaptable, efficiency of carbon con version it is high and low than oxygen consumption, purified synthesis gas is simple the advantages that, represent the hair of large-scale Coal Gasification Technology
Open up direction.
The burner hearth of two-stage gasifier uses water wall structure, and burner hearth is divided into two sections of upper furnace and lower hearth, and lower hearth is
First reaction zone, the nozzle for inputting coal dust, vapor and oxygen are located at the two side of lower hearth.Cinder notch is located at lower hearth
Bottom high temperature section, using slag tap.Upper furnace is second reaction zone, its internal diameter is small compared with the internal diameter of lower hearth, and height is longer,
Two symmetrical secondary fine coal and vapor imports are provided with the side wall of upper furnace.During operation, dry coal is sprayed into by gasification furnace hypomere
Powder, oxygen (pure oxygen is oxygen-enriched) and steam, the coal dust amount sprayed into account for the 85~90% of total coal amount, are sprayed in upper furnace entrance
Enter superheated steam and fine coal, institute's straying quatity accounts for the 10~15% of total coal amount.The effect of epimere stove mainly has two in the device：One
It is then to carry out thermal cracking and partial gasification using hypomere producer gas sensible heat, improves total cold gas efficiency and the thermal efficiency, the second is
Gas temperature is reduced while two sections of thermal crackings and partial gasification is carried out, Quench gas volume is circulated to reduce.
Double-section dry coal powder pressure gasifying technology, its efficiency of carbon con version are mainly determined by residence time and reaction temperature, are reacted
Temperature is higher, and efficiency of carbon con version is higher, and for reaction temperature mainly to oxygen coal than related, reaction temperature is excessive to cause cold gas efficiency to drop
It is low；Residence time is longer, and conversion ratio is also higher, and the residence time is mainly related to reaction zone volume, manufactures cost to reduce, can lead to
Cross increase reaction pressure and improve the mode of flowing in stove.
The content of the invention
To make full use of reactor volume, double-section dry coal powder pressurized-gasification furnace efficiency of carbon con version is lifted, the utility model carries
Go out a kind of four-way process burner structure suitable for double-section dry coal powder pressure gasifying technology, by optimizing nozzle structure,
The particle disturbance during coal dust and oxygen penetrating burner hearth is enhanced, makes coal dust more uniform with oxygen mix, furnace high-temperature area
More concentrate, in the case where reaction zone volume and pressure are certain, considerably increase coal dust conversion ratio.
To achieve these goals, the technical solution adopted in the utility model is as follows：
A kind of four-way process burner structure for double-section dry coal powder pressure gasifying technology, by center coal dust channel 8,
Around the oxygen channel 9 of the annular of center coal dust channel 8, outer layer coal dust channel 10 and gas passage 11 is protected, what outermost layer was set
Burner cooling water intake tunnel 14 and cooling water the export passage 13 of annular, all passages use coaxial cloth by axis of burner center
Put.
The center coal dust channel 8 is located at burner central shaft, and the passage being made of inner ring nozzle 1 is formed, under process conditions
Center coal amount is the 70%~80% of total coal feeding amount.
The center coal dust channel 8, its pumped (conveying) medium use N2Or CO2。
The oxygen channel 9 is made of 1 and first middle ring nozzle 2 of inner ring nozzle.
The outer layer coal dust channel 10 is made of the first middle ring nozzle 2 and the second middle ring nozzle 3, and outer layer coal amount is total coal amount
20%~30%.
The protection gas passage 11 is made of the second middle ring nozzle 3 and outer shroud nozzle 4, and burner protection gas uses superheated steam
As protection medium, efficiency of carbon con version is improved, or N is used to gas component requirement according to downstream2Or CO2Component.
The cooling water intake tunnel 14 is made of outer shroud nozzle 4 and inner side water-cooling jacket 6, and the cooling water exports passage
13 are made of inner side water-cooling jacket 6 and outside water-cooling jacket 7, and burner leading portion cooling chamber 12 is located at burner cooling water export passage
13。
Coal dust uses N when entering burner2Or CO2Conveyed, or conveyed by synthesis gas class reducibility gas；Oxidant
It is oxygen-enriched more than 80% using pure oxygen or oxygen mole fraction, and mixed up in advance with oxidant according to the different superheated steams that add of coal
For reaction medium.
The center coal dust channel 8, oxygen channel 9, outer layer coal dust channel 10 and protection gas passage 11 use Inconel
600 high-temperature nickel-base alloys；Cooling-water duct uses 1Cr18Ni9Ti stainless steels.
Burner to fire end face spraying high temperature nickel-base alloy flame retardant coating, fire resisting layer thickness ＜ 5mm, effectively reduce heat at burner
Stress and cracking phenomena.
Compared to the prior art, the utility model possesses following advantage：
1st, the utility model increases increase outer layer coal dust channel by varying nozzle structure, coal dust is carried out in mixing chamber
Preliminary premix, lifting coal dust goes out flow velocity at burner, while outer layer coal dust is fully atomized, and flame extrapolation, makes reaction zone more
Concentrate, simultaneously because the input of outermost layer protection gas, reducing burner side towards the fire temperature reduces thermic load at burner, not only
Efficiency of carbon con version can be improved, while burner service life can be greatly prolonged.
2nd, the utility model burner is provided with internal layer and outer layer coal dust channel, by coal dust proportion adjustment, greatly enhances coal
The mixing of powder and oxygen, improves coal dust and oxygen enters gasification furnace flow field, and gasification furnace high-temperature region is more concentrated.
Brief description of the drawings
Fig. 1 is the utility model four-way process burner schematic diagram.
In figure：
1- inner ring nozzles；2- the first middle ring nozzles；3- the second middle ring nozzles；4- outer shroud nozzles；5- thin-walleds support；In 6-
Side water-cooling jacket；Water-cooling jacket on the outside of 7-；8- centers coal dust channel；9- oxygen channels；10- outer layer coal dust channels；11- is protected
Gas passage；12- burner leading portions water cooling chamber；13- cooling waters export passage；14- cooling water intake tunnels.
Embodiment
To further appreciate that the utility model content, feature and the course of work, it is described further with reference to attached drawing：
This burner leads to by center coal dust channel 8, around annular oxygen channel 9, the outer layer coal dust of center coal dust channel
Road 10, protection gas passage 11 are formed, and outermost layer is arranged to the burner cooling water intake tunnel 14 and cooling water export passage of annular
13, all passages are axis using coaxially arranged using burner center.
Center coal dust channel 8 is located at burner central shaft, and the passage being made of inner ring nozzle 1 is formed, center under process conditions
Coal amount is about the 75% of total coal feeding amount；Oxygen channel 9 is made of 1 and first middle ring nozzle 2 of inner ring nozzle；Outer layer coal dust channel
10 are made of the first middle ring nozzle 2 and the second middle ring nozzle 3, and outer layer coal amount is about the 25% of total coal amount；The protection gas of burner leads to
Road 11 is made of the second middle ring nozzle 3 and outer shroud nozzle 4, and burner protection gas is using superheated steam as protection medium；Outer ring spray
First 4 and inner side water cold sleeve 6 form burner cooling water intake tunnel 14, inner side water-cooling jacket 6 and outside water-cooling jacket 7 are formed
Burner cooling water exports passage 13, and burner counter-fire face is burner leading portion cooling chamber 12；
By taking the IGCC power stations of Huaneng Group Tianjin as an example, its gasification installation is using 2000t/d grades of double-section dry coal powder pressurizations of coal feeding amount
Gasification process, its vapor pressure are 3.0MPag, and coal dust presses N in using2As pumped (conveying) medium, center coal dust coal feeding amount is
50.47t/h, outer layer coal dust coal feeding amount are 16.82t/h, and it is about 1 that it, which conveys gas-solid mass ratio,:10, oxygen is pure using 99.5%
Oxygen, outermost layer protection gas passage is using superheated steam as protection gas, its input amount is 6t/h, and burner cooling water pressure is
4.0MPag, 210 DEG C, single burner internal circulating load is 15m3/ h,
Its center oxygen channel, coal dust channel and outer layer oxygen channel are using high-temperature nickel-based conjunctions such as Inconel 600
Gold；Cooling-water duct is using stainless steels such as 1Cr18Ni9Ti.Burner to fire end face spraying high temperature nickel-base alloy flame retardant coating, fire resisting
Layer thickness is 3mm, cools down water flow velocity ＞ 6m/s in burner cooling chamber, greatly reduces the thermal stress on burner head.
The coal dust of center flow velocity about 8~12m/s is after the high speed oxygen of burner leading portion and flow velocity about 20-40m/s premix, profit
Outer layer low speed coal dust 6-10m/s is atomized with larger kinetic energy, outermost layer uses steam protection, after the ejection of its burner therefrom
The heart is outwards followed successively by：The combustion reaction of carbon particle mainly occurs for zoneofoxidation, oxidationreduction area and reducing zone, zoneofoxidation, aoxidize-
Mainly based on secondary response, main burning, carbon particle and the carbon dioxide that carbon monoxide occurs and vapor are gone back for reducing zone
Former reaction, water gas shift reaction etc., the reduction reactions such as water gas shift reaction mainly occur for reducing zone.
Compared with common process burner, the utility model four-way burner makes flame extrapolate, therefore high-temperature region is concentrated, therefore its
Efficiency of carbon con version is up to 99.5%, simultaneously because the reasonable Arrangement in flow field, greatly reduces the thermic load of burner end face, it continuously makes
It is with good economic efficiency with the service life more than 8000h.
Claims (10)
- A kind of 1. four-way process burner structure for double-section dry coal powder pressure gasifying technology, it is characterised in that：By center Coal dust channel (8), the oxygen channel (9) around center coal dust channel (8) annular, outer layer coal dust channel (10) and protection gas lead to Road (11), annular burner cooling water intake tunnel (14) and cooling water the export passage (13) that outermost layer is set, all passages It is axis using coaxially arranged using burner center.
- A kind of 2. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：Center coal dust channel (8) is located at burner central shaft, and the passage being made of inner ring nozzle (1) is formed, technique Coal amount in center is the 70%~80% of total coal feeding amount under operating mode.
- A kind of 3. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 2 Structure, it is characterised in that：The center coal dust channel (8), its pumped (conveying) medium use N2Or CO2。
- A kind of 4. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：The oxygen channel (9) is made of inner ring nozzle (1) and the first middle ring nozzle (2).
- A kind of 5. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：The outer layer coal dust channel (10) is made of the first middle ring nozzle (2) and the second middle ring nozzle (3), outer layer Coal amount is the 20%~30% of total coal amount.
- A kind of 6. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：The protection gas passage (11) is made of the second middle ring nozzle (3) and outer shroud nozzle (4), burner protection gas Using superheated steam as protection medium, efficiency of carbon con version is improved, or N is used to gas component requirement according to downstream2Or CO2Component.
- A kind of 7. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：The cooling water intake tunnel (14) is made of outer shroud nozzle (4) and inner side water-cooling jacket (6), described cold But water export passage (13) is made of inner side water-cooling jacket (6) and outside water-cooling jacket (7), and burner leading portion cooling chamber (12) is located at Burner cooling water export passage (13).
- A kind of 8. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：Coal dust uses N when entering burner2Or CO2Conveyed, or conveyed by synthesis gas class reducibility gas； Oxidant is oxygen-enriched more than 80% using pure oxygen or oxygen mole fraction, and adds superheated steam and oxidant according to the different of coal Premix is used as reaction medium.
- A kind of 9. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：The center coal dust channel (8), oxygen channel (9), outer layer coal dust channel (10) and protection gas passage (11) 600 high-temperature nickel-base alloys of Inconel are used；Cooling-water duct uses 1Cr18Ni9Ti stainless steels.
- A kind of 10. four-way process burner knot for double-section dry coal powder pressure gasifying technology according to claim 1 Structure, it is characterised in that：Burner is burnt to fire end face spraying high temperature nickel-base alloy flame retardant coating, effectively fire resisting layer thickness ＜ 5mm, reduction Thermal stress and cracking phenomena at mouth.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721179382.4U CN207294700U (en) | 2017-09-14 | 2017-09-14 | A kind of four-way process burner structure for double-section dry coal powder pressure gasifying technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721179382.4U CN207294700U (en) | 2017-09-14 | 2017-09-14 | A kind of four-way process burner structure for double-section dry coal powder pressure gasifying technology |
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| Publication Number | Publication Date |
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| CN207294700U true CN207294700U (en) | 2018-05-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112852493A (en) * | 2019-11-28 | 2021-05-28 | 华东理工大学 | Method and equipment for preparing synthesis gas by gasifying hard asphalt powder |
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2017
- 2017-09-14 CN CN201721179382.4U patent/CN207294700U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112852493A (en) * | 2019-11-28 | 2021-05-28 | 华东理工大学 | Method and equipment for preparing synthesis gas by gasifying hard asphalt powder |
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