CN103074114A - Dry pulverized coal low-pressure gasification furnace - Google Patents
Dry pulverized coal low-pressure gasification furnace Download PDFInfo
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- CN103074114A CN103074114A CN2012105153964A CN201210515396A CN103074114A CN 103074114 A CN103074114 A CN 103074114A CN 2012105153964 A CN2012105153964 A CN 2012105153964A CN 201210515396 A CN201210515396 A CN 201210515396A CN 103074114 A CN103074114 A CN 103074114A
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- gasification furnace
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- coal dust
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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
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Abstract
The invention discloses a dry pulverized coal low-pressure gasification furnace and belongs to the technical field of gasification furnaces. The dry pulverized coal low-pressure gasification furnace comprises a metal shell, a liner, a gasification room, a synthetic gas outlet positioned at one side of the bottom of the gasification furnace, and a dry slag discharge port positioned at the bottom of the gasification furnace, the top of the gasification room is provided with a pulverized coal nozzle, the inner wall of the gasification room is provided with a water cooling tube, the upper end of the gasification room is provided with an upper cold shock ring, the lower end of the gasification room is provided with a lower cold shock ring, the inner diameter of the hearth of the gasification furnace is 3-10m, and a part of the gasification furnace under the synthetic gas outlet is directly connected with the dry slag discharge port. Compared with gasification furnaces in the prior art, the dry pulverized coal low-pressure gasification furnace adopting the above structure has the advantages of low gasification pressure, good cooling effect, low cost, low failure rate, energy saving and environmental protection.
Description
Technical field
The present invention relates to the vapourizing furnace technical field, particularly relate to a kind of dry coal dust gasification furnace.
Background technology
The cleaning of coal and efficient utilization are the great technical tasks in the energy and environment protection field, the world today, also are one of gordian techniquies of Chinese national economy sustainable development.Gasification is the main path that primary energy source is changed into clean secondary energy, and its product is burning gas (coal gas), synthetic gas, reducing gas, hydrogen, carbon monoxide.The coal gasification technology is widely used in the preparation of synthetic ammonia, pure carbon monoxide, the fields such as preparation of pure hydrogen, and vapourizing furnace then is the key equipment of gasification.Existing dry coal dust gasification furnace all is the heat insulation modes of high pressure shell built-in water-cooling wall, adopts numerous and diverse technique of slagging tap with slag anti-slag melting deslagging, water-bath, and equipment manufacturing cost is high, failure rate is high, and easily produces sewage, coal tar contaminate environment.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, provide that a kind of vapor pressure is low, good cooling results, cost are low, failure rate is low, substantially free of contamination dry coal dust gasification furnace.
Low pressure dry coal dust gasification furnace of the present invention, comprise metal shell body, lining, vaporizer, be positioned at vapourizing furnace bottom one side syngas outlet, be positioned at the dried slag-drip opening of vapourizing furnace bottom, the top of described vaporizer is provided with coal nozzle, described vaporizer inwall is provided with that water cooling tube, upper end are provided with the cold shock ring, the lower end is provided with lower cold shock ring, the furnace interior diameter of described vapourizing furnace is 3～10 meters, and described syngas outlet bottom directly connects dried slag-drip opening.
The flame diameter of reaction zone is 1～2.5 meter in the described vaporizer, and the ratio of furnace interior diameter and flame diameter is 3～10.
The upper/lower terminal of described water cooling tube is connected with drum, and described water cooling tube spacing is 100～150 millimeters, and described water cooling tube is light pipe, spiral tube, finned tube or Mo Shi wall pipe.
Described vapourizing furnace lower end is provided with bracing frame, and bracing frame is fixed on the vapourizing furnace metal shell body.
Described coal nozzle is one or more.
Described lining is refractory brick, insulating brick and insulating cotton.
Low pressure dry coal dust gasification furnace of the present invention (low-voltage equipment), operating pressure is 0.05～1.27MPa, adopt metal shell, metal shell is generally general steel plate, take heat preserving and insulating material and high-strength wearable material as lining, with the water cooling tube auxiliary temperature-reducing, top of gasification furnace arranges the dry pulverized coal nozzle, dry pulverized coal nitrogen, carbonic acid gas is carried, oxygen (or oxygen-rich air), water vapor is as vaporized chemical, coal dust, oxygen, water vapor sprays into stove internal combustion gasification reaction through coal nozzle, form the column high-temperature zone of certain diameter, along with the furnace diametric(al) enlarges, divide five districts of A-E, temperature distribution is 1600 ℃ in A district in the stove, 1450 ℃ in B district, 1300 ℃ in C district, 1150 ℃ in D district, 1000 ℃ in E district, in the flame reaction outer contour, Φ 1 is the flame diameter of reaction zone, Φ 2 is effective diameters in the furnace, A, B two districts are coal dust reaction high-temperature zones, lime-ash is molten state, C, D, E district temperature progressively reduces, make the cinder (or lime-ash) of molten state progressively become solid slag, the diameter range of Φ 1 is 1～2.5 meter, and Φ 2 diameter ranges are 3～10 meters, and the value of Φ 2/ Φ 1 is 3～10, the cold shock device is set in the middle and lower part under vaporizer, major function is to use cold shocking water, water vapor or cooled coal gas cooling are down to below 1000 ℃ the gas of furnace center, make molten ash become the solid lime-ash.
High-temperature zone and the cold area under control of the stove inside circumference spacing of low pressure dry coal dust gasification furnace central burner gasification of the present invention are large, the formation temperature district of successively decreasing, make high-temperature fusion bonding lime-ash become low this principle of solid-state lime-ash of temperature, and to adopt cold shock cooling method (such as cold shocking water, water vapor or cooled coal gas) to make the lower central area lime-ash become solid-state lime-ash be one of core of present technique in the middle and lower part; Low pressure gasifying (operating pressure be 0.05～1.27MPa) be present technique core two.
The present invention compared with prior art has that vapor pressure is low, good cooling results, cost are low, the advantage of failure rate is low, energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the structural representation of low pressure dry coal dust gasification furnace of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1: 1. coal nozzle, 2. coal dust firing reaction zone outer contour is 3. gone up the cold shock ring, 4. metal shell body, 5. lining, 6. cold pipe 7. descends the cold shock ring, 8. bracing frame, 9. syngas outlet, 10. dried slag-drip opening, 11. drums.
It comprises metal shell body, lining, vaporizer, be positioned at the syngas outlet of vapourizing furnace bottom one side, be positioned at the dried slag-drip opening of vapourizing furnace bottom, the top of described vaporizer is provided with coal nozzle, described vaporizer inwall is provided with that water cooling tube, upper end are provided with the cold shock ring, the lower end is provided with lower cold shock ring, the furnace interior diameter of described vapourizing furnace is 8 meters, and described syngas outlet bottom directly connects dried slag-drip opening.The upper/lower terminal of water cooling tube is connected with drum, and lining is refractory brick, insulating brick, insulating cotton, and coal nozzle is one, and the vapourizing furnace lower end is provided with bracing frame, and bracing frame is fixed on the vapourizing furnace metal shell body.
Claims (6)
1. low pressure dry coal dust gasification furnace, comprise metal shell body, lining, vaporizer, be positioned at vapourizing furnace bottom one side syngas outlet, be positioned at the dried slag-drip opening of vapourizing furnace bottom, the top of described vaporizer is provided with coal nozzle, it is characterized in that: described vaporizer inwall is provided with that water cooling tube, upper end are provided with the cold shock ring, the lower end is provided with lower cold shock ring, the furnace interior diameter of described vapourizing furnace is 3～10 meters, and described syngas outlet bottom directly connects dried slag-drip opening.
2. low pressure dry coal dust gasification furnace according to claim 1, it is characterized in that: the flame diameter of reaction zone is 1～2.5 meter in the described vaporizer, the ratio of furnace interior diameter and flame diameter is 3～10.
3. low pressure dry coal dust gasification furnace according to claim 1 and 2, it is characterized in that: the upper/lower terminal of described water cooling tube is connected with drum, described water cooling tube spacing is 100～150 millimeters, and described water cooling tube is light pipe, spiral tube, finned tube or Mo Shi wall pipe.
4. low pressure dry coal dust gasification furnace according to claim 1 and 2, it is characterized in that: described vapourizing furnace lower end is provided with bracing frame, and bracing frame is fixed on the vapourizing furnace metal shell body.
5. low pressure dry coal dust gasification furnace according to claim 1 and 2, it is characterized in that: described coal nozzle is one or more.
6. low pressure dry coal dust gasification furnace according to claim 1 and 2, it is characterized in that: described lining is refractory brick, insulating brick and insulating cotton.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012105153964A CN103074114A (en) | 2012-12-05 | 2012-12-05 | Dry pulverized coal low-pressure gasification furnace |
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| CN2012105153964A CN103074114A (en) | 2012-12-05 | 2012-12-05 | Dry pulverized coal low-pressure gasification furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753569A (en) * | 2016-11-17 | 2017-05-31 | 中国五环工程有限公司 | Low pressure dry powder coal gasifying process |
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- 2012-12-05 CN CN2012105153964A patent/CN103074114A/en active Pending
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| JP2004035748A (en) * | 2002-07-04 | 2004-02-05 | Nippon Steel Corp | Slag discharge apparatus in gasification furnace of waste plastic and method for discharging slag by using the same |
| CN101003755A (en) * | 2006-01-19 | 2007-07-25 | 神华集团有限责任公司 | Gasification stove with multi nozzle, and gasification method |
| CN101003754A (en) * | 2006-01-19 | 2007-07-25 | 神华集团有限责任公司 | Entrained flow gasification stove, and gasification method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753569A (en) * | 2016-11-17 | 2017-05-31 | 中国五环工程有限公司 | Low pressure dry powder coal gasifying process |
| CN106753569B (en) * | 2016-11-17 | 2022-03-18 | 中国五环工程有限公司 | Low-pressure dry powder coal gasification process |
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Application publication date: 20130501 |