CN103102993B - Non-chilling anti-slagging radiant waste heat boiler and its application - Google Patents
Non-chilling anti-slagging radiant waste heat boiler and its application Download PDFInfo
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- CN103102993B CN103102993B CN201310054951.2A CN201310054951A CN103102993B CN 103102993 B CN103102993 B CN 103102993B CN 201310054951 A CN201310054951 A CN 201310054951A CN 103102993 B CN103102993 B CN 103102993B
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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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
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Abstract
The invention discloses a non-chilling anti-slagging radiant waste heat boiler and its application. The non-chilling anti-slagging radiant waste heat boiler is a non-chilling radiant waste heat boiler that can effectively prevent a heating surface from slagging and efficiently trap ash particles. The pressure shell inner wall of the radiant waste heat boiler adopts a refractory and heat insulation material as a liner, thus effectively simplifying the device structure. A gas protection apparatus is arranged in an easy slagging area on a high temperature heating surface. The gas protection apparatus has a sleeve structure, a local gas/vapor film protection area can form on the heating surface to cool the molten ash particles carried in high temperature gas and prevent them from hitting against the heating surface to undergo slagging. Meanwhile, due to the employment of local gas/vapor film protection, compared with a chilling structure, the radiation heat transfer section is long, and the heat transfer efficiency is high. The lower end of a water cooled wall is a flaring structure, and by reducing the gas flow velocity and designing a steering structure, the trapping rate of ash particles in the gas can be enhanced. The radiant waste heat boiler disclosed in the invention is applicable to recovery of high temperature synthesis gas sensible heat in a coal gasification process.
Description
Technical field
The present invention relates to a kind of device and industrial application thereof that is applied to the high-temperature gas sensible heat recovery producing after carbonaceous fuel gasifying or burning, relate in particular to a kind of retrieving arrangement of vapourizing furnace outlet synthetic gas sensible heat.
Background technology
Integrated gasification combined cycle plants (Integrated Coal Gasification Combined Cycle, be called for short IGCC) be one of cutting edge technology of current global clean energy utilization, compared with common coal fired power generation technology, it is advantageous that and can utilize more efficiently coal resources, and greatly reduce the discharge of burning pollutant.There is respectively the IGCC power station of 250MW and 300MW to put into operation in Holland and Spain.Therefore the efficient clean utilization important in inhibiting of grasping the primary energy source to China completely of technique, in IGCC system, one of gordian technique is coal dust pressurized gasification technology, adopt waste heat boiler to reclaim and can make IGCC efficiency of plant improve approximately 4 ~ 5 percentage points the sensible heat of high-temperature synthesis gas, be conducive to energy-saving and emission-reduction.Waste heat boiler comprises radiation waste heat boiler and convection current exhaust-heat boiler two portions.
In order to improve efficiency of carbon conversion, reduce the cost of producing apparatus, vapourizing furnace generally adopts the mode of high-temperature pressurizing to move.Temperature of reaction is the scope of 1000 ℃ ~ 1600 ℃, and pressure is between the MPa of 1.0MPa ~ 10.At present, the type of cooling of industrial high-temperature gas generally adopts Quench and two kinds of forms of radiation waste heat boiler.But the mode of Quench will be used a large amount of cold air/liquid, this just increases construction and the running cost of equipment.Particularly use liquid to carry out Quench, can reduce greatly quality and the system efficiency of synthetic gas.Radiation waste heat boiler is the cooling best mode of high-temperature gas in IGCC power station.Can in the situation that not reducing synthetic gas quality, reclaim by the sensible heat to high-temperature gas.
The problem that industrial used radiation waste heat boiler mainly exists now for Boiler Heating Surfaces, dust stratification serious.Former because the molten state soot particle carrying in gas bonds on heating surface, the exchange capability of heat of reduction heating surface, forms stifled slag when serious, cause operational trouble.Therefore, design and a kind ofly can effectively prevent slagging scorification on heating surface, radiation waste heat boiler simple in structure, by there being great industrial application meaning, can effectively promote the development of the Coal Chemical Industry industries such as IGCC.
Summary of the invention
Technical problem to be solved by this invention is the radiation waste heat boiler that prevents the slagging scorification on heating surface of radiation waste heat boiler; in the situation that not reducing synthetic gas quality, effectively reclaim sensible heat; to meet the demand of modern industry to waste heat recovery, can be applied to the protection of other structure formation waste heat boiler heating surfaces simultaneously.
In order to address the above problem, the invention provides a kind of non-Quench Anti-slagging radiation waste heat boiler, it is characterized in that, comprise that inwall is provided with the pressure housing of lining, the top of pressure housing is provided with High Temperature Gas gas feed, and side is provided with High Temperature Gas outlet, and bottom is provided with slag bath, one side of slag bath is provided with slag bath drain port, and the bottom of slag bath is provided with slag-drip opening; Pressure housing inner top is provided with nitrogen protection chamber, the indoor protection gas header that is provided with of nitrogen protection; In pressure housing, be provided with water wall tube, between pressure housing and water wall tube, be provided with gas baffle, gas baffle is positioned at protection gas header below, High Temperature Gas outlet top, between gas baffle and protection gas header, is provided with water coolant upper collecting chamber; The lower end of water wall tube is provided with reversal chamber; Pressure housing is provided with the import of protection gas, entrance of cooling water, cooling water outlet and nitrogen inflation inlet, the import of protection gas connects the indoor protection gas header of nitrogen protection, entrance of cooling water connects water coolant upper collecting chamber, cooling water outlet connects water coolant lower header, and nitrogen inflation inlet connects nitrogen protection chamber; Water wall tube comprises equally distributed water cooling tube one and more than one water cooling tube two, and water cooling tube two is symmetrical in water wall tube, and the upper end of water cooling tube one, water cooling tube two is connected with water coolant upper collecting chamber, and lower end is connected with water coolant lower header; Water wall tube is provided with at least one deck gas shield device layer, and gas shield device layer comprises the gas shield device of being located on every water cooling tube two; Water wall tube top is provided with inlet plenum; The top of gas baffle, water wall tube and pressure housing inner top form the nitrogen protection chamber of sealing.
Preferably, described lining is fiery lining in refractory heat-insulating.
Preferably, the contour structures of described inlet plenum is the oval or lower large little pyramidal structure of upwards throwing.
Preferably, the lower end of described water wall tube is provided with flared section, and the angle of flared section and described water wall tube vertical axis is 15 ° ~ 60 °.
Preferably, described gas shield device comprises built-in gas/steam pipe, and expose from water cooling tube two upper end of built-in gas/steam pipe, is communicated with protection gas header, and the lower end of built-in gas/steam pipe is blind end; One side of built-in gas/steam pipe is provided with more than one gas shield unit, and gas shield unit exposes from water cooling tube two, is positioned at the inner side of water wall tube.
Further, between described water cooling tube two and built-in gas/steam pipe, the area of the area of cross section and water cooling tube one interior cross section is identical.
Further, described gas shield unit is bulge-structure, and this bulge-structure is provided with the outlet of at least 3 protection gas.
Further, described protection gas outlet is [0 °, 90 °] with the scope of the horizontal sextant angle of described built-in gas/steam pipe horizontal axis, protect the scope of the vertical angle of gas outlet and built-in gas/steam pipe vertical axis to be (0 °, 90 °].
Further, described gas shield device is 3～50 apart from synthetic gas inlet plenum upper end distance with the ratio of the diameter of High Temperature Gas gas feed along the horizontal plane of the first layer gas shield unit in pressure housing circumferential direction.
Preferably, described water wall tube is provided with at least 4 gas shield devices.
Preferably, described water wall tube is two-sided light leak membrane wall.
Preferably, the thickness as outside of described gas baffle is larger than inner side thickness, and upside is horizontal plane, and downside is inclined-plane, and the angle of this inclined-plane and boiler vertical axis is 45 ° ~ 90 °.
The present invention also provides the application of above-mentioned non-Quench Anti-slagging radiation waste heat boiler, it is characterized in that, temperature after gasification is that the raw gas of 1300～1600 ℃ is entered by the High Temperature Gas gas feed of inlet plenum, in gas, contain the lime-ash of molten state, under the rolling action of gas, enter by heat exchange in the space in water wall tube with the form of jet, after continuing heat exchange, the annular space in reversal chamber enters pressure housing and water wall tube enters follow-up workshop section by High Temperature Gas outlet, the lime-ash capturing in heat transfer process drops to slag bath, discharges through slag-drip opening; Nitrogen enters nitrogen protection chamber by nitrogen inflation inlet, keeps the pressure equilibrium of pressure and the interior main air stream of stove of nitrogen protection chamber, prevents that water wall tube is out of shape because pressure produces; Protection gas, by protecting gas import to enter, enters main air stream region by gas shield unit, forms local gas protective belt on water wall tube, by air impingement with coolingly prevent that molten state lime-ash from touching on the heating surface of water wall tube; Water coolant enters water coolant upper collecting chamber by entrance of cooling water, after water wall tube heating, enters water coolant lower header, after collecting, enters convection current exhaust-heat boiler.
Preferably, the pressure of described protection gas is higher than furnace pressure 0.1～3.0MPa, and temperature is higher than 20～200 ℃ of process gas dew point temperature value, and medium is the process gas after cooling dedusting, and the needed amount of protection gas is 1～30% of mainstream gas total amount.
Preferably, the pressure of described water coolant is 4.0～15.0MPa, and state is unsaturated water.
Beneficial effect of the present invention:
1. there is the slagging prevention capacity that other radiation waste heat boilers do not have.The gas shield device adopting at heating surface can effectively form local gas/steam film district, cooling molten state soot particle effectively, and hinder it and strike on heating surface, protection heating surface;
2. gas consumption is few, and running cost is low.Adopt the method for local gas/steam film protection fewer than adopting the method gas consumption of Quench;
3. lime-ash capturing efficiency is high.The utility model adopts double-deck gas passage on identical axial distance, to increase the nearly stroke of gas and the residence time of gas of one times, improves the catch rate of lime-ash.The flaring structure of water wall can effectively reduce the speed of air-flow, reduces the carrying capacity of gas to soot particle, and the design of steering structure improves separating of gas and soot particle;
4. simple in structure, easy to maintenance.The utility model adopts refractory materials in housing inner side, effectively simplifies the structure of radiation waste pot, reduces device fabrication, operation and maintenance cost;
5. gas shield device is modular design, and repair and replacement are convenient;
6. heat exchange efficiency is high.As everyone knows, radiation heat transfer is in the situation that gaseous constituent is definite, and temperature is the determinative that affects exchange capability of heat.The utility model can, in the situation that reducing gas temperature not significantly, effectively prevent the fouling and slagging on heating surface, guarantees the exchange capability of heat of gas in high temperature section.And the two-sided light leak water wall of circular channel increased again heating surface area, improve a lot than one side water wall exchange capability of heat.Therefore, the exchange capability of heat of described waste heat boiler is greatly improved compared with other existing form exchange capability of heat.
Accompanying drawing explanation
The structural representation of the non-Quench Anti-slagging radiation waste heat boiler that Fig. 1 provides for the utility model;
Fig. 2 is the sectional view of A-A face in Fig. 1;
Fig. 3 is the sectional view in Tu2Zhong main air stream district;
Fig. 4 is the sectional view that is provided with water cooling tube two vertical directions of gas shield device;
Fig. 5 is the schematic diagram that is provided with water cooling tube two cross sections of gas shield device.
In figure:
1-pressure housing; 2-lining; 3-inlet plenum;
4-water cooling tube one; 5-water wall tube; 6-flared section;
7-gas baffle; 8-slag bath; Built-in gas/the steam pipe of 9-;
10-gas shield unit; 11-nitrogen protection chamber; 12-protection gas header;
13-nitrogen inflation inlet; 14-water coolant lower header; The import of 15-protection gas;
16-entrance of cooling water; 17-water coolant upper collecting chamber; 18-cooling water outlet;
19-slag bath water-in; 20-slag bath drain port; 21-slag-drip opening;
The gas feed of 22-High Temperature Gas; 23-reversal chamber; The outlet of 24-High Temperature Gas;
The outlet of 25-protection gas; 26-water cooling tube two; 27-lining back up pad.
Embodiment
For the present invention is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment
As Figure 1-5, for the non-Quench Anti-slagging of one provided by the invention radiation waste heat boiler, comprise that inwall posts the cylindrical pressure housing 1 of lining 2, lining 2 adopts fiery lining in refractory heat-insulating, and bottom adopts the lining back up pad 27 that is fixed on pressure housing 1 inwall to support.The top of pressure housing 1 is provided with High Temperature Gas gas feed 22, and side is provided with High Temperature Gas outlet 24, and bottom is provided with slag bath 8, and a side of slag bath 8 is provided with slag bath drain port 20, and the bottom of slag bath 8 is provided with slag-drip opening 21.Pressure housing 1 inner top is provided with nitrogen protection chamber 11, is provided with protection gas header 12 in nitrogen protection chamber 11.In pressure housing 1, be provided with water wall tube 5, between pressure housing 1 and water wall tube 5, be provided with annular gas baffle plate 7, gas baffle 7 is coaxially arranged with pressure housing 1.Gas baffle 7 is positioned at protection gas header 12 belows, High Temperature Gas outlet top.The thickness as outside of gas baffle 7 is larger than inner side thickness, and upside is horizontal plane, and downside is inclined-plane, and its cross section is up-small and down-big pyramidal structure, and the angle δ of this inclined-plane and boiler vertical axis is 60 °.Between gas baffle 7 and protection gas header 12, be provided with water coolant upper collecting chamber 17; The lower end of water wall tube 5 is provided with reversal chamber 23.The both sides of pressure housing 1 are respectively equipped with protection gas import 15, entrance of cooling water 16, cooling water outlet 18; the protection gas header 12 that protection gas import 15 connects in nitrogen protection chamber 11; entrance of cooling water 16 connects water coolant upper collecting chamber 17; cooling water outlet 18 connects water coolant lower header 14; wherein between the protection gas import 15 of a side and entrance of cooling water 16, be provided with nitrogen inflation inlet 13, nitrogen inflation inlet 13 is communicated with nitrogen protection chamber 11.Water wall tube 5 adopts two-sided light leak membrane wall, be arranged in annular by one 4 and 8 water cooling tubes 2 26 of 16 water cooling tubes, connect to form by water-cooled sheet, water cooling tube 2 26 is symmetrical in water wall tube 5, between every two water cooling tubes 2 26, has two water cooling tubes 1.The upper end of water cooling tube 1, water cooling tube 2 26 is connected with water coolant upper collecting chamber 17, and lower end is connected with water coolant lower header 14.Between water cooling tube 2 26 and built-in gas/steam pipe 9, the area of the area of cross section and water cooling tube one 4 interior cross sections is identical.Water wall tube 5 is provided with one deck gas shield device layer, and gas shield device layer comprises the gas shield device of being located on every water cooling tube 2 26.Described gas shield device comprises built-in gas/steam pipe 9, and expose from water cooling tube 2 26 upper end of built-in gas/steam pipe 9, is communicated with protection gas header 12, and the lower end of built-in gas/steam pipe 9 is blind end; One side of built-in gas/steam pipe 9 is provided with 2 gas shield unit 10 of longitudinal arrangement, and gas shield unit 10 exposes from water cooling tube 2 26, is positioned at the inner side of water wall tube 5.Gas shield unit 10 is bulge-structure, has 3 protection gas outlet 25 on this bulge-structure.The outlet 25 of protection gas is respectively 0 °, 45 °, 90 ° with the horizontal sextant angle α of built-in gas/steam pipe 9 horizontal axis, and the outlet 25 of protection gas is respectively 0 °, 45 °, 90 ° with the vertical angle β of built-in gas/steam pipe 9 vertical axis.Water wall tube 5 tops are provided with inlet plenum 3, the ellipsoidal structure of inlet plenum 3 for upwards throwing, the curvilinear structures of employing flaring, the dead in line of axis and radiation waste heat boiler.The top of gas baffle 7, water wall tube 5 and pressure housing 1 inner top form the nitrogen protection chamber 11 of sealing.The lower end of water wall tube 5 is flared section 6 structures, and flared section 6 is 30 ° with the angle γ of water wall tube 5 vertical axis.Gas shield device is 7 apart from synthetic gas inlet plenum 3 upper end distance H with the ratio of the diameter D of High Temperature Gas gas feed 22 along the horizontal plane of the first layer gas shield unit 10 in pressure housing 1 circumferential direction.When installation, first gas shield device is machined, pack into by built-in gas/steam pipe 9 in a section of water cooling tube 2 26, then be welded to the vacancy of the water cooling tube 2 26 of water wall tube 5.
When above-mentioned non-Quench Anti-slagging radiation waste heat kettleman does, the raw gas that is 1300～1600 ℃ by the temperature after gasification is entered by the High Temperature Gas gas feed 22 of inlet plenum 3, in gas, contain the lime-ash of molten state, under the rolling action of gas, enter by heat exchange in the space in water wall tube 5 with the form of jet, after continuing heat exchange, the annular space in reversal chamber 23 enters pressure housing 1 and water wall tube 5 enters follow-up workshop section by High Temperature Gas outlet 24, the lime-ash capturing in heat transfer process drops to slag bath 8, discharges through slag-drip opening 21; Nitrogen enters nitrogen protection chamber 11 by nitrogen inflation inlet 13, keeps the pressure equilibrium of pressure and the interior main air stream of stove of nitrogen protection chamber 11, prevents that water wall tube 5 is out of shape because pressure produces; Protection gas, by protecting gas import 15 to enter, enters main air stream region by gas shield unit 10, forms local gas protective belt on water wall tube 5, by air impingement with coolingly prevent that molten state lime-ash from touching on the heating surface of water wall tube 5; Water coolant enters water coolant upper collecting chamber 17 by entrance of cooling water 16, after water wall tube 5 heating, enters water coolant lower header 14, after collecting, enters convection current exhaust-heat boiler.The pressure of protection gas is higher than furnace pressure 1.0MPa, and temperature is higher than 100 ℃ of process gas dew point temperature value, and medium is the process gas after cooling dedusting, and the needed amount of protection gas is 15% of mainstream gas total amount.The pressure of water coolant is 8.0MPa, and state is unsaturated water.
The arrangement form of water wall tube 5 heating surfaces is regular polygon or circle, and waste heat boiler is coaxially arranged, and gas shield device is circumferentially arranged symmetrically with along heating surface, according to the number of selecting protector of synthetic tolerance, is generally greater than 4.Installation site on axis is to be 10%-50% of heating surface height from the distance of inlet plenum 3, forms local air film protective belt effectively at the heating surface of water wall tube 5.Gas shield unit 10 number of perforate on heating surface is greater than 2, preferably opens 5 holes.The flared section 6 of heating surface lower end, is flaring structure, expanded-angle γ=45 °.Lining 2 and water wall tube 5 form annular gas passage, as shown in Figure 2.When boiler running, form main air stream in gas passage, gas shield device makes to produce local air film protective belt in main air stream, as shown in Figure 3.
Claims (14)
1. a non-Quench Anti-slagging radiation waste heat boiler, it is characterized in that, comprise that inwall is provided with the pressure housing of lining (2) (1), the top of pressure housing (1) is provided with High Temperature Gas gas feed (22), side is provided with High Temperature Gas outlet (24), bottom is provided with slag bath (8), and a side of slag bath (8) is provided with slag bath drain port (20), and the bottom of slag bath (8) is provided with slag-drip opening (21); Pressure housing (1) inner top is provided with nitrogen protection chamber (11), is provided with protection gas header (12) in nitrogen protection chamber (11); In pressure housing (1), be provided with water wall tube (5), between pressure housing (1) and water wall tube (5), be provided with gas baffle (7), gas baffle (7) is positioned at protection gas header (12) below, High Temperature Gas outlet (24) top, between gas baffle (7) and protection gas header (12), is provided with water coolant upper collecting chamber (17); The lower end of water wall tube (5) is provided with reversal chamber (23); Pressure housing (1) is provided with protection gas import (15), entrance of cooling water (16), cooling water outlet (18) and nitrogen inflation inlet (13), protection gas import (15) connects the protection gas header (12) in nitrogen protection chamber (11), entrance of cooling water (16) connects water coolant upper collecting chamber (17), cooling water outlet (18) connects water coolant lower header (14), and nitrogen inflation inlet (13) connects nitrogen protection chamber (11); Water wall tube (5) comprises equally distributed water cooling tube one (4) and more than one water cooling tube two (26), water cooling tube two (26) is symmetrical in water wall tube (5), the upper end of water cooling tube one (4), water cooling tube two (26) is connected with water coolant upper collecting chamber (17), and lower end is connected with water coolant lower header (14); Water wall tube (5) is provided with at least one deck gas shield device layer, and gas shield device layer comprises the gas shield device of being located on every water cooling tube two (26); Water wall tube (5) top is provided with inlet plenum (3); The top of gas baffle (7), water wall tube (5) and pressure housing (1) inner top form the nitrogen protection chamber (11) of sealing; Described gas shield device comprises built-in gas/steam pipe (9), and expose from water cooling tube two (26) upper end of built-in gas/steam pipe (9), is communicated with protection gas header (12), and the lower end of built-in gas/steam pipe (9) is blind end; One side of built-in gas/steam pipe (9) is provided with more than one gas shield unit (10), and expose from water cooling tube two (26) gas shield unit (10), is positioned at the inner side of water wall tube (5).
2. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, described lining (2) is fiery lining in refractory heat-insulating.
3. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, the contour structures of described inlet plenum (3) is the oval or lower large little pyramidal structure of upwards throwing.
4. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, the lower end of described water wall tube (5) is provided with flared section (6), and flared section (6) is 15 ° ~ 60 ° with the angle (γ) of described water wall tube (5) vertical axis.
5. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, between described water cooling tube two (26) and built-in gas/steam pipe (9), the area of cross section is identical with the area of water cooling tube one (4) interior cross section.
6. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, described gas shield unit (10) is bulge-structure, and this bulge-structure is provided with at least 3 protection gas outlets (25).
7. non-Quench Anti-slagging radiation waste heat boiler according to claim 6; it is characterized in that; described protection gas outlet (25) is [0 ° with the scope of the horizontal sextant angle (α) of described built-in gas/steam pipe (9) horizontal axis; 90 °]; protect the scope of the vertical angle (β) of gas outlet (25) and built-in gas/steam pipe (9) vertical axis to be (0 °, 90 °].
8. non-Quench Anti-slagging radiation waste heat boiler according to claim 1; it is characterized in that, described gas shield device is 3～50 apart from synthetic gas inlet plenum (3) upper end distance (H) with the ratio of the diameter (D) of High Temperature Gas gas feed (22) along the horizontal plane of the first layer gas shield unit (10) in pressure housing (1) circumferential direction.
9. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, described water wall tube (5) is provided with at least 4 gas shield devices.
10. non-Quench Anti-slagging radiation waste heat boiler according to claim 1, is characterized in that, described water wall tube (5) is two-sided light leak membrane wall.
11. non-Quench Anti-slagging radiation waste heat boilers according to claim 1, it is characterized in that, the thickness as outside of described gas baffle (7) is larger than inner side thickness, and upside is horizontal plane, downside is inclined-plane, and the angle (δ) of this inclined-plane and boiler vertical axis is 45 ° ~ 90 °.
The application of non-Quench Anti-slagging radiation waste heat boiler described in 12. claims 1, it is characterized in that, temperature after gasification is that the raw gas of 1300～1600 ℃ is entered by the High Temperature Gas gas feed (22) of inlet plenum (3), in gas, contain the lime-ash of molten state, under the rolling action of gas, enter by heat exchange in the space in water wall tube (5) with the form of jet, after continuing heat exchange, the annular space in reversal chamber (23) enters pressure housing (1) and water wall tube (5) enters follow-up workshop section by High Temperature Gas outlet (24), the lime-ash capturing in heat transfer process drops to slag bath (8), discharge through slag-drip opening (21), nitrogen enters nitrogen protection chamber (11) by nitrogen inflation inlet (13), keeps the pressure equilibrium of pressure and the interior main air stream of stove of nitrogen protection chamber (11), prevents that water wall tube (5) is out of shape because pressure produces, protection gas is by protecting gas import (15) to enter, enter main air stream region by gas shield unit (10), in the upper local gas protective belt that forms of water wall tube (5), by air impingement with coolingly prevent that molten state lime-ash from touching on the heating surface of water wall tube (5), water coolant enters water coolant upper collecting chamber (17) by entrance of cooling water (16), after water wall tube (5) heating, enters water coolant lower header (14), after collecting, enters convection current exhaust-heat boiler.
The application of 13. non-Quench Anti-slagging radiation waste heat boilers according to claim 12; it is characterized in that; the pressure of described protection gas is higher than furnace pressure 0.1～3.0MPa; temperature is higher than 20～200 ℃ of process gas dew point temperature value; medium is the process gas after cooling dedusting, and the needed amount of protection gas is 1～30% of mainstream gas total amount.
The application of 14. non-Quench Anti-slagging radiation waste heat boilers according to claim 12, is characterized in that, the pressure of described water coolant is 4.0～15.0MPa, and state is unsaturated water.
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| CN201310054951.2A CN103102993B (en) | 2013-02-20 | 2013-02-20 | Non-chilling anti-slagging radiant waste heat boiler and its application |
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| CN201310054951.2A CN103102993B (en) | 2013-02-20 | 2013-02-20 | Non-chilling anti-slagging radiant waste heat boiler and its application |
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| CN103102993B true CN103102993B (en) | 2014-07-09 |
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| CN105202535B (en) * | 2015-10-15 | 2017-10-24 | 上海锅炉厂有限公司 | A kind of burner suitable for high basic metal content fuel |
| US10781384B2 (en) * | 2015-12-16 | 2020-09-22 | Air Products And Chemicals, Inc. | Gasification system and process |
| CN107686748A (en) * | 2016-08-05 | 2018-02-13 | 清华大学山西清洁能源研究院 | Gasification furnace |
| CN113834234B (en) * | 2021-09-30 | 2023-03-21 | 东方电气集团科学技术研究院有限公司 | Low temperature device based on preparation of nitrogen fixation cooling medium |
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| CN203144357U (en) * | 2013-02-20 | 2013-08-21 | 上海锅炉厂有限公司 | Non-chilling slag-bonding prevention radiation waste heat boiler |
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2013
- 2013-02-20 CN CN201310054951.2A patent/CN103102993B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4328007A (en) * | 1979-08-21 | 1982-05-04 | Deutsche Babcock Aktiengesellschaft | Apparatus for gasification of fine-grain coal |
| US4377132A (en) * | 1981-02-12 | 1983-03-22 | Texaco Development Corp. | Synthesis gas cooler and waste heat boiler |
| CN202092088U (en) * | 2010-12-24 | 2011-12-28 | 上海锅炉厂有限公司 | Novel radiation type waste heat boiler |
| CN203144357U (en) * | 2013-02-20 | 2013-08-21 | 上海锅炉厂有限公司 | Non-chilling slag-bonding prevention radiation waste heat boiler |
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