CN105132036A - Entrained flow bed dried coal dust gasification device for normal-pressure air gasification and gasification method of entrained flow bed dried coal dust gasification device - Google Patents
Entrained flow bed dried coal dust gasification device for normal-pressure air gasification and gasification method of entrained flow bed dried coal dust gasification device Download PDFInfo
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- CN105132036A CN105132036A CN201510659521.2A CN201510659521A CN105132036A CN 105132036 A CN105132036 A CN 105132036A CN 201510659521 A CN201510659521 A CN 201510659521A CN 105132036 A CN105132036 A CN 105132036A
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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]
Abstract
The invention discloses an entrained flow bed dried coal dust gasification device for normal-pressure air gasification and a gasification method of the entrained flow bed dried coal dust gasification device. The device comprises a synthesized coal gas outlet, a gasification device body, a gasification device slag opening and a slag tank. A bottom gasification agent spraying inlet is formed in the bottom of the gasification device body, a peripheral gasification agent spraying inlet and a coal dust spraying inlet are formed in the outer wall of the gasification device body, and a gasification agent is divided into three parts to be conveyed into the gasification device body through the three spraying inlets. The entrained flow bed dried coal dust gasification device is further provided with a heat exchange device and a synthesized gas combustor, and a gasification air jacket is added to the outer side of the gasification device body. According to the entrained flow bed dried coal dust gasification device for normal-pressure air gasification and the gasification method of the entrained flow bed dried coal dust gasification device, the entrained flow bed dried coal dust gasification device can work continuously for a long time and cannot be damaged by a high temperature, the carbon conversion rate of coal dust is high, meanwhile, part of porous and combustible semi-coke is obtained, diversified choices are provided for industries of heat treatment, special steel plants, engineering construction and the like which need heat sources, and the technical problem of small-sized coal dust gasification devices under the normal pressure can be solved, and the daily processing amount of the coal dust gasification devices is about 100 tons.
Description
Technical field
The present invention relates to Dry Feeding Entrain Bed Coal Gasification equipment, particularly relating to coal is that the powdered solid carbonaceous fuel of representative and vaporized chemical at high temperature react and generate CO, H
2, the air flow bed atmospheric air gasification reaction equipment of semicoke and gasification process thereof.
Background technology
Gasification is the core technology of Coal Clean efficiency utilization, being that the coal-based bulk chemical of development and liquid fuel synthesize, the basis of the advanced process industrial such as integrated gasification combined cycle plants (IGCC) power generation system, polygenerations systeme, hydrogen manufacturing, fuel cell, direct reduction iron making, is the gordian technique of these industry developments, core technology and leading technology.
The history in the producer gas generator invented the earliest from German Siemens brother in the middle of the 19th century existing more than 150 years so far, has formed fixing (movement) bed, fluidized-bed and air flow bed three kinds of technology.UGI gasifying process, Lurgi gasifying process, BGL gasifying process that fixing (movement) bed is representative with traditional producer gas generator, but the syngas outlet temperature of this explained hereafter is not high, containing a large amount of tar and tar sewage, seriously polluted, be progressively eliminated.Fluidized-bed gasification utilizes fluidised principle and technology, coal particle is made to reach fluidization by gasifying medium, its representative has early stage Winkler gasifying process, to circulating fluidized bed (CFB) gasifying process, KBR transporting bed gasification technique, ash agglomerating gasifying process, these techniques and fixed bed gasification technique are than being greatly improved, but the operation of physics and chemistry character on fluidized-bed gasification furnace due to coal has to be affected very significantly, such as in devolatilization process, coal has the tendency of cohering, this will cause fluidisation bad, particularly particularly serious for the coal that agglutinating value(of coal) is strong, these factors can limit the highest bed temperature of fluidized-bed, thus also can limit production ability and efficiency of carbon conversion, thus affect gasification result.Air flow bed, also known as entrained bed, is the principle utilizing jet entrainment in hydromeehanics, pulverized coal particle is sprayed into mixing in equipment for gasification with gasifying medium by nozzle at high speeds, is conducive to fully carrying out of gasification reaction.Its efficiency of carbon conversion of entrained flow gasification equipment is high, not containing products such as tar in synthetic gas, meet the main flow direction of Coal Gasification Technology development, the E-Gas gasifying process, GSP gasifying process, Shell gasifying process etc. of current use are all entrained flow gasifications, the equipment of these gasifying process is all meet large scale chemical plant, and the basic coal treatment capacity of widespread use is all at the entrained flow gasification equipment of more than 1000T/D.At present at miniaturization, atmospheric air as vaporized chemical, invest little, day output and need the industry of thermal source to have great demand at the equipment for gasification of 100T/D in thermal treatment, extraordinary steel mill, engineering construction etc., but also do not reach the requirement in market technically.
Summary of the invention
The object of the invention is: provide a kind of under atmospheric pressure environment, utilize air as the air flow bed coal gasification equipment of vaporized chemical.
The object of the invention is also: the gasification process providing this air flow bed coal gasification equipment a kind of.
The object of the invention is achieved through the following technical solutions: the present invention comprises synthetic gas outlet, equipment for gasification body, equipment for gasification cinder notch and slag bath, at equipment for gasification body bottom portion, bottom vaporized chemical entrance is set, outer wall arranges circumferential vaporized chemical entrance and pulverized coal injection entrance, vaporized chemical is divided into three part inputs, is inputted by pulverized coal injection entrance, circumferential vaporized chemical entrance and bottom vaporized chemical entrance respectively.
The present invention is also configured with heat-exchanger rig and syngas combustion device, gas exit is connected to syngas combustion device entrance by pipeline, the import of synthetic combustion required air is set bottom heat-exchanger rig, heat-exchanger rig outlet syngas combustion device, heat transferring medium pipeline and recycle pump is increased in equipment for gasification body, heat transferring medium in it is carried out recirculation return-air apparatus body after heat exchange by heat transferring medium pipeline in heat-exchanger rig, input in heat-exchanger rig circulation tube by recycle pump after in equipment for gasification body again, circulation so is always gone down.
The present invention increases one deck gasification wind chuck outside equipment for gasification body.
Height bottom circumferential vaporized chemical entrance to equipment for gasification of the present invention and the ratio of equipment for gasification height are 0.2:1 ~ 0.5:1; The ratio of the height bottom pulverized coal injection entrance to equipment for gasification and equipment for gasification height is 0.5:1 ~ 1:1; Bottom vaporized chemical entrance is 300 ~ 500mm apart from the vertical range of equipment for gasification cinder notch bottom surface.
Equipment for gasification body of the present invention is right cylinder, and the ratio of its height and diameter is 1:1 ~ 5:1.
Circumferential vaporized chemical entrance of the present invention divides a row four to be arranged symmetrically with between two, and symmetrical circumferential vaporized chemical entrance is in same level, and adjacent circumferential vaporized chemical entrance becomes spiral-line to rise or declines to be arranged; Pulverized coal injection entrance divides a row four to be arranged symmetrically with between two, symmetrical pulverized coal injection entrance is in same level, adjacent pulverized coal injection entrance becomes spiral-line to rise or declines to be arranged, all circumferential vaporized chemical entrances and pulverized coal injection entrance spiral angle consistent, angular range is 1 ° ~ 20 °, preferably 3 ° ~ 10 °.
The axis of the present invention's circumference vaporized chemical entrance is consistent with the angle of the bus of equipment for gasification body, and angular range is 60 ~ 70 °, and consistent with angle formed by the point of intersection tangent line of equipment for gasification body, angular range is 90 ~ 110 °; The axis of the pulverized coal injection entrance of coal dust import is consistent with angle formed by the bus of equipment for gasification body, angular range is 50 ~ 70 °, the pulverized coal injection entrance of coal dust import is consistent with angle formed by the point of intersection tangent line of equipment for gasification body, and angular range is 120 ~ 135 °.
The gasification process of the Dry Feeding Entrain Bed Coal Gasification equipment of atmospheric air gasification of the present invention is: coal dust is under air conveying effect, entered by some groups of pulverized coal injection entrances and carry out being mixed to form vortex flow field with some groups of circumference vaporized chemical entrances in equipment for gasification body and react, the vaporized chemical that the coal dust fallen and bottom vaporized chemical entrance enter meets and reacts, generation synthetic gas and the inflammable semicoke of porous are discharged from synthetic gas outlet, liquid slag enters slag bath along equipment for gasification cinder notch and discharges, wherein circumferential vaporized chemical entrance any one can light auxiliary mouth as coal dust.
The vaporized chemical of pulverized coal injection entrance input of the present invention accounts for 50 ~ 59% of all vaporized chemical total amounts, the vaporized chemical of circumference vaporized chemical entrance input accounts for 30 ~ 36% of all vaporized chemical total amounts, and the vaporized chemical of bottom vaporized chemical entrance input accounts for 5 ~ 20% of all vaporized chemical total amounts.
The flow velocity of pulverized coal injection entrance of the present invention is 20 ~ 45m/s, and the flow velocity of circumferential vaporized chemical entrance is 25 ~ 65m/s, and bottom gasification entrance flow velocity is 3 ~ 5m/s, and gasification wind is 5 ~ 40m/s at equipment for gasification body and gasification wind chuck gap location flow velocity.
Facts have proved, the present invention can non-stop run and can not be subject to high temperature for a long time, the available gas simultaneously obtained and partially porous inflammable semicoke, for thermal treatment, extraordinary steel mill, engineering construction etc. need the industry of thermal source to provide multifarious selection, under miniaturization, normal pressure can be solved, the technical problem of day output in the coal gasification equipment of about 100 tons, possess following superior effect:
1, the present invention is theoretical according to associated jets flow field, by transmittance process between strengthening phase, extend the reaction times, improve the secondary reaction degree that residence time destribution improves particle, therefore the multi-jet decoration form of symmetrical expression is adopted, clashed in opposite directions by multiply asymmetrical fluid and improve gas-solid two alternate transmission speeds, strengthen the mixing between fluid, thus improve the chemical reaction rate being diffused as rate-determining steps with alternate mixing, extend the carbon granule residence time in the reactor, improve efficiency of carbon conversion.
2, the present invention is by controlling the size in the gap between gasification wind chuck and gasification apparatus body, make to take away a large amount of heat energy by the vaporized chemical (air) of high flow rate therebetween, so both served the effect of protection outer wall, vaporized chemical (air) temperature can be made again to increase, contribute to improving subsequent gasification result; Next is at the strong heat transferring medium such as thermal oil, water of the heat conductivity of equipment for gasification body intermediate flow; by these media, heat energy is taken out of; by heat-exchanger rig, a part of heat energy is swapped out; so also serve the effect of protection outer wall; air again needed for the burner of following syngas combustion such as outlet coal gas and semicoke etc. has carried out preheating; for later stage Thorough combustion prepares, reach making full use of of coal resource, the waste of the heat energy avoiding coal to produce in switching process.
3, the present invention calculates and engineering practice according to turbulent flow heterogeneous in stove, devise the ratio of equipment for gasification body height and diameter, the circumference height of vaporized chemical entrance to equipment for gasification body bottom portion and the ratio of equipment for gasification body height, the height of pulverized coal injection entrance to equipment for gasification body bottom portion and the ratio of equipment for gasification body height, and bottom vaporized chemical entrance is to the distance of equipment for gasification body bottom portion, equipment is in operation and reaches very high efficiency of carbon conversion, achieve the cheap coal be easy to get, air synthesizes clean, efficiently, expensive synthesis heating gas and the inflammable semicoke of porous.
4, for further obtaining synthetic gas and the inflammable semicoke of porous of high-quality, the present invention fits engineering practice by computer software module, vaporized chemical is divided into three part inputs, has strict demand in the vaporized chemical accounting of its three parts sprayed into.
Accompanying drawing explanation
Fig. 1 is the structural representations of embodiments of the invention with circumferential vaporized chemical entrance;
Fig. 2 is the structural representation of the embodiment of the present invention with pulverized coal injection entrance;
Fig. 3 is the view in the A-A direction of the embodiment of the present invention;
Fig. 4 is the stretch-out view of the equipment for gasification body of embodiments of the invention.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention is described in detail.
Embodiment 1:
As shown in Figure 1,2,3, 4, the present embodiment is made up of synthetic gas outlet 1, equipment for gasification body 2, equipment for gasification cinder notch 6, slag bath 7, heat-exchanger rig 12 and syngas combustion device 13.Bottom vaporized chemical entrance 8 is set bottom equipment for gasification body 2, outer wall arranges circumferential vaporized chemical entrance 4 and pulverized coal injection entrance 5, vaporized chemical is divided into three part inputs, is inputted by pulverized coal injection entrance 5, circumferential vaporized chemical entrance 4 and bottom vaporized chemical entrance 8 respectively.Gas exit 1 is connected to syngas combustion device 13 entrance by pipeline, synthetic combustion required air import 11 is set bottom heat-exchanger rig 12, heat-exchanger rig 12 outlet syngas combustion device 13, heat transferring medium pipeline 9 is increased in equipment for gasification body 2, heat transferring medium in it is carried out recirculation return-air apparatus body 2 after heat exchange by heat transferring medium pipeline 9 in heat-exchanger rig 12, then is inputted in heat-exchanger rig 12 circulation tube by recycle pump 10 after in equipment for gasification body 2.One deck gasification wind chuck 3 is increased outside equipment for gasification body 2; in order to protect equipment for gasification body 2; determined the flow velocity of the vaporized chemical passed through by the size of the gap L 3 between gasification wind chuck 3 and equipment for gasification body 2, the aspects that this example is selected reaches optimum regime within the scope of 20 ~ 22mm.Flowed by the moment of heat transferring medium simultaneously, carry out heat exchange with heat-exchanger rig 12, both reached and reduced the effect of heat transferring medium (thermal oil, water or air) temperature, again for the syngas combustion device 13 required air that burns has carried out preheating, kill two birds with one stone.Consider miniaturization to use, in the factor such as personal management, safety consideration situation, the present embodiment generally all selects thermal oil to the heat transferring medium in medium pipeline 9.
For improving the turnover ratio of carbon and the output of synthetic gas, in the present embodiment, equipment for gasification body 2 is right cylinder, and the ratio of its height H and diameter D is for best at 1.48:1.In gasification, wish most that the mixing flow field obtained is that coal dust flows downward from a high position, to collide hybrid reaction with the vaporized chemical flowed from bottom to top, therefore, height L11 bottom circumference vaporized chemical entrance 4 to equipment for gasification body 2 and the ratio of equipment for gasification body 2 height H are 0.44:1 ~ 0.49:1, the ratio of the height L12 bottom pulverized coal injection entrance 5 to equipment for gasification body 2 and equipment for gasification body 2 height H is 0.51:1 ~ 0.56:1, and bottom vaporized chemical entrance 8 is highly 400 millimeters apart from the distance L2 of equipment for gasification cinder notch 6 bottom surface is best vaporized state.Simultaneously in order to allow coal dust be reacted fully, vaporized chemical is divided into three positions and enters conversion zone with different flow velocitys, wherein, the flow velocity of pulverized coal injection entrance is 44m/s, and accounting for total vaporized chemical ratio is 55%; The flow velocity of circumference vaporized chemical entrance is 58m/s, and accounting for total vaporized chemical ratio is 34%; Bottom gasification entrance flow velocity is 4m/s, and accounting for total vaporized chemical ratio is 11%; By this set, contribute to improving efficiency of carbon conversion and reducing or remitting coal dust falling into slag bath waste.
While equipment needs miniaturization and needs to improve the output of charcoal percent conversion and synthetic gas, best scheme is the reaction times of proper extension coal dust in equipment for gasification body 2, therefore, this example has all done certain setting, its angle of spiral α to each circumferential vaporized chemical entrance 4 and the angle of each pulverized coal injection entrance 5 and the relative height between them
3be 5 °, every one deck two kinds of entrances all adopt four nozzles symmetrical arrangement between two, meanwhile, and the angle α of the axis of circumferential vaporized chemical entrance 4 and the bus of equipment for gasification body 2
11be 68 °, with angle α formed by the point of intersection tangent line of equipment for gasification body 2
21be 103 °, the angle α of the axis of each pulverized coal injection entrance 5 and the bus of equipment for gasification body 2
12be 68 °, angle α formed by the axis of each pulverized coal injection entrance 5 and the point of intersection tangent line of equipment for gasification body 2
22be 122 °.
Embodiment 2:
The present embodiment structure is identical with embodiment 1, and the height bottom circumferential vaporized chemical entrance to equipment for gasification and the ratio of equipment for gasification height are 0.2:1; The ratio of the height bottom pulverized coal injection entrance to equipment for gasification and equipment for gasification height is 1:1; Bottom vaporized chemical entrance is 300mm apart from the vertical range of equipment for gasification cinder notch bottom surface.Equipment for gasification body is right cylinder, and the ratio of its height and diameter is 5:1.All circumferential vaporized chemical entrances and pulverized coal injection entrance spiral angle consistent with direction, angular range is 20 °.The axis of circumference vaporized chemical entrance is consistent with the angle of the bus of equipment for gasification body, and angular range is 60 °, and consistent with angle formed by the point of intersection tangent line of equipment for gasification body, angular range is 110 °; The axis of the pulverized coal injection entrance of coal dust import is consistent with angle formed by the bus of equipment for gasification body, and angular range is 50 °, and the pulverized coal injection entrance of coal dust import is consistent with angle formed by the point of intersection tangent line of equipment for gasification body, and angular range is 135 °.The vaporized chemical of pulverized coal injection entrance input accounts for 50% of all vaporized chemical total amounts, and the vaporized chemical of circumferential vaporized chemical entrance input accounts for 36% of all vaporized chemical total amounts, and the vaporized chemical of bottom vaporized chemical entrance input accounts for 20% of all vaporized chemical total amounts.The flow velocity of pulverized coal injection entrance is 20m/s, and the flow velocity of circumferential vaporized chemical entrance is 25m/s, and bottom gasification entrance flow velocity is 5m/s, and gasification wind is 40m/s at equipment for gasification body and gasification wind chuck gap location flow velocity.
Embodiment 3:
The present embodiment structure is identical with embodiment 1, and the height bottom circumferential vaporized chemical entrance to equipment for gasification and the ratio of equipment for gasification height are 0.5:1; The ratio of the height bottom pulverized coal injection entrance to equipment for gasification and equipment for gasification height is 0.5:1; Bottom vaporized chemical entrance is 500mm apart from the vertical range of equipment for gasification cinder notch bottom surface.Equipment for gasification body is right cylinder, and the ratio of its height and diameter is 1:1.All circumferential vaporized chemical entrances and pulverized coal injection entrance spiral angle consistent with direction, angular range is 1 °.The axis of circumference vaporized chemical entrance is consistent with the angle of the bus of equipment for gasification body, and angular range is 70 °, and consistent with angle formed by the point of intersection tangent line of equipment for gasification body, angular range is 90 °; The axis of the pulverized coal injection entrance of coal dust import is consistent with angle formed by the bus of equipment for gasification body, and angular range is 70 °, and the pulverized coal injection entrance of coal dust import is consistent with angle formed by the point of intersection tangent line of equipment for gasification body, and angular range is 120 °.The vaporized chemical of pulverized coal injection entrance input accounts for 59% of all vaporized chemical total amounts, and the vaporized chemical of circumferential vaporized chemical entrance input accounts for 30% of all vaporized chemical total amounts, and the vaporized chemical of bottom vaporized chemical entrance input accounts for 5% of all vaporized chemical total amounts.The flow velocity of pulverized coal injection entrance is 45m/s, and the flow velocity of circumferential vaporized chemical entrance is 65m/s, and bottom gasification entrance flow velocity is 3m/s, and gasification wind is 5m/s at equipment for gasification body and gasification wind chuck gap location flow velocity.
Embodiment 4:
The present embodiment structure is identical with embodiment 1, and the height bottom circumferential vaporized chemical entrance to equipment for gasification and the ratio of equipment for gasification height are 0.38:1; The ratio of the height bottom pulverized coal injection entrance to equipment for gasification and equipment for gasification height is 0.8:1; Bottom vaporized chemical entrance is 360mm apart from the vertical range of equipment for gasification cinder notch bottom surface.Equipment for gasification body is right cylinder, and the ratio of its height and diameter is 3:1.All circumferential vaporized chemical entrances and pulverized coal injection entrance spiral angle consistent with direction, angular range is 10 °.The axis of circumference vaporized chemical entrance is consistent with the angle of the bus of equipment for gasification body, and angular range is 65 °, and consistent with angle formed by the point of intersection tangent line of equipment for gasification body, angular range is 98 °; The axis of the pulverized coal injection entrance of coal dust import is consistent with angle formed by the bus of equipment for gasification body, and angular range is 60 °, and the pulverized coal injection entrance of coal dust import is consistent with angle formed by the point of intersection tangent line of equipment for gasification body, and angular range is 130 °.The vaporized chemical of pulverized coal injection entrance input accounts for 50 ~ 59% of all vaporized chemical total amounts, and the vaporized chemical of circumferential vaporized chemical entrance input accounts for 30 ~ 36% of all vaporized chemical total amounts, and the vaporized chemical of bottom vaporized chemical entrance input accounts for 5 ~ 20% of all vaporized chemical total amounts.The flow velocity of pulverized coal injection entrance is 20 ~ 45m/s, and the flow velocity of circumferential vaporized chemical entrance is 25 ~ 65m/s, and bottom gasification entrance flow velocity is 3 ~ 5m/s, and gasification wind is 5 ~ 40m/s at equipment for gasification body and gasification wind chuck gap location flow velocity.
Claims (10)
1. the Dry Feeding Entrain Bed Coal Gasification equipment of an atmospheric air gasification, comprise synthetic gas outlet, equipment for gasification body, equipment for gasification cinder notch, slag bath, is characterized in that: equipment for gasification body bottom portion arranges bottom vaporized chemical entrance, and outer wall arranges circumferential vaporized chemical entrance and pulverized coal injection entrance, vaporized chemical is divided into three part inputs, is inputted by pulverized coal injection entrance, circumferential vaporized chemical entrance and bottom vaporized chemical entrance respectively.
2. the Dry Feeding Entrain Bed Coal Gasification equipment of atmospheric air gasification as claimed in claim 1, it is characterized in that: be also configured with heat-exchanger rig and syngas combustion device, gas exit is connected to syngas combustion device entrance by pipeline, the import of synthetic combustion required air is set bottom heat-exchanger rig, heat-exchanger rig outlet syngas combustion device, heat transferring medium pipeline and recycle pump is increased in equipment for gasification body, heat transferring medium in it is carried out recirculation return-air apparatus body after heat exchange by heat transferring medium pipeline in heat-exchanger rig, input in heat-exchanger rig circulation tube by recycle pump after in equipment for gasification body again, so circulation is gone down always.
3. the Dry Feeding Entrain Bed Coal Gasification equipment of atmospheric air gasification as claimed in claim 1, is characterized in that: outside equipment for gasification body, increase one deck gasification wind chuck.
4. the Dry Feeding Entrain Bed Coal Gasification equipment of the atmospheric air gasification as described in claim 1 or 2 or 3, is characterized in that: the height bottom circumferential vaporized chemical entrance to equipment for gasification and the ratio of equipment for gasification height are 0.2:1 ~ 0.5:1; The ratio of the height bottom pulverized coal injection entrance to equipment for gasification and equipment for gasification height is 0.5:1 ~ 1:1; Bottom vaporized chemical entrance is 300 ~ 500mm apart from the vertical range of equipment for gasification cinder notch bottom surface.
5. the Dry Feeding Entrain Bed Coal Gasification equipment of the atmospheric air gasification as described in claim 1 or 2 or 3, is characterized in that: equipment for gasification body is right cylinder, the ratio of its height and diameter is 1:1 ~ 5:1.
6. the Dry Feeding Entrain Bed Coal Gasification equipment of the atmospheric air gasification as described in claim 1 or 2 or 3, it is characterized in that: circumferential vaporized chemical entrance divides a row four to be arranged symmetrically with between two, symmetrical circumferential vaporized chemical entrance is in same level, and adjacent circumferential vaporized chemical entrance becomes spiral-line to rise or declines to be arranged; Pulverized coal injection entrance divides a row four to be arranged symmetrically with between two, symmetrical pulverized coal injection entrance in same level, adjacent pulverized coal injection entrance become spiral-line rise or decline arrange, all circumferential vaporized chemical entrances and pulverized coal injection entrance spiral angle consistent with direction.
7. the Dry Feeding Entrain Bed Coal Gasification equipment of the atmospheric air gasification as described in claim 1 or 2 or 3, it is characterized in that: the axis of circumferential vaporized chemical entrance is consistent with the angle of the bus of equipment for gasification body, angular range is 60 ~ 70 °, consistent with angle formed by the point of intersection tangent line of equipment for gasification body, angular range is 90 ~ 110 °; The axis of the pulverized coal injection entrance of coal dust import is consistent with angle formed by the bus of equipment for gasification body, angular range is 50 ~ 70 °, the pulverized coal injection entrance of coal dust import is consistent with angle formed by the point of intersection tangent line of equipment for gasification body, and angular range is 120 ~ 135 °.
8. the gasification process of the Dry Feeding Entrain Bed Coal Gasification equipment of the atmospheric air gasification as described in claim 1 or 2 or 3 is: coal dust is under air conveying effect, entered by some groups of pulverized coal injection entrances and carry out being mixed to form vortex flow field with some groups of circumference vaporized chemical entrances in equipment for gasification body and react, the vaporized chemical that the coal dust fallen and bottom vaporized chemical entrance enter meets and reacts, generation synthetic gas and the inflammable semicoke of porous are discharged from synthetic gas outlet, liquid slag enters slag bath along equipment for gasification cinder notch and discharges, wherein circumferential vaporized chemical entrance any one can light auxiliary mouth as coal dust.
9. gasification process as claimed in claim 8, it is characterized in that: the vaporized chemical of wherein pulverized coal injection entrance input accounts for 50 ~ 59% of all vaporized chemical total amounts, the vaporized chemical of circumference vaporized chemical entrance input accounts for 30 ~ 36% of all vaporized chemical total amounts, and the vaporized chemical of bottom vaporized chemical entrance input accounts for 5 ~ 20% of all vaporized chemical total amounts.
10. gasification process as described in claim 8 or 9, it is characterized in that: the flow velocity of pulverized coal injection entrance is 20 ~ 45m/s, the flow velocity of circumference vaporized chemical entrance is 25 ~ 65m/s, bottom gasification entrance flow velocity is 3 ~ 5m/s, and gasification wind is 5 ~ 40m/s at equipment for gasification body and gasification wind chuck gap location flow velocity.
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| CN105623740B (en) * | 2016-03-16 | 2019-06-14 | 安徽科达洁能股份有限公司 | Clean coal gas preparation and preparation system |
| CN107312575A (en) * | 2017-08-01 | 2017-11-03 | 中国科学院工程热物理研究所 | The circulating fluidized bed gasification device and gasification process of staged air distribution |
| CN107312575B (en) * | 2017-08-01 | 2023-07-18 | 中国科学院工程热物理研究所 | Circulating fluidized bed gasification device with graded air distribution and gasification method |
| CN110240944A (en) * | 2019-05-21 | 2019-09-17 | 浙江大学 | The method and device of fine coal constant-pressure and high-temperature cracking oxygen-rich gasification coproduction coal gas and semicoke |
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Application publication date: 20151209 |