CN210176804U - Full waste boiler flow gasification system - Google Patents
Full waste boiler flow gasification system Download PDFInfo
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- CN210176804U CN210176804U CN201920280930.5U CN201920280930U CN210176804U CN 210176804 U CN210176804 U CN 210176804U CN 201920280930 U CN201920280930 U CN 201920280930U CN 210176804 U CN210176804 U CN 210176804U
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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
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Abstract
The utility model provides a complete useless pot flow gasification system, including gasification reacting chamber and complete useless pot flow high temperature sensible heat recovery unit, complete useless pot flow high temperature sensible heat recovery unit includes radiation section and convection current section, and the high temperature side entry of the synthetic gas exit linkage radiation section of gasification reacting chamber, the high temperature side export of radiation section are through the high temperature side entry linkage of pipe section with the convection current section, all are equipped with heat exchange element in radiation section and the convection current section. The utility model can recover the heat contained in the gasification furnace outlet product to the maximum extent through the whole waste boiler process, and a large amount of steam is produced as a byproduct, so as to improve the energy utilization efficiency of the whole system; the whole heat transfer system is integrated in one device, and the utilization rate of the space is improved to the maximum extent. The high-temperature gasification product directly enters the radiation section, so that the sensible heat recovery and utilization of the gasification product are greatly improved; a chilling structure is added at the bottom of the radiation section, so that local overhigh temperature is prevented, and the slag bonding condition of a corner position is improved; the system efficiency is greatly improved.
Description
Technical Field
The utility model relates to a full waste boiler flow gasification system belongs to coal-fired high temperature gasification system technical field.
Background
The carbon solid fuel such as coal and the like can form a gasification product at about 1500 ℃ after being gasified at high temperature in a gasification chamber, and the gasification product mainly contains H2、CO、CO2The synthetic gas and the molten state ash slag contain a large amount of high-position sensible heat in the gasification product, and have higher recovery value.
At present, a wet chilling technology is mainly adopted for gasification products, and a large amount of high-level heat contained in the gasification products is taken away by a cooling medium and is lost.
The gasified product contains liquid slag and molten fly ash, large-scale slagging technical risk exists in the sensible heat recovery process, the gasified slag flows into a downstream cooling system along with the synthesis gas, the molten slag has strong cohesiveness, and the slag is easy to directly form contamination adhesion on a water-cooled wall, even slagging and blocking, so that the efficiency of the system is greatly influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: how to improve the sensible heat recovery and utilization of gasification products, improve the slagging condition and improve the system efficiency.
In order to solve the technical problem, the technical scheme of the utility model provides a complete useless pot flow gasification system, its characterized in that: the high-temperature sensible heat recovery device comprises a gasification reaction chamber and a full waste pot process high-temperature sensible heat recovery device, wherein the full waste pot process high-temperature sensible heat recovery device comprises a radiation section and a convection section, a synthesis gas outlet of the gasification reaction chamber is connected with a high-temperature side inlet of the radiation section, a high-temperature side outlet of the radiation section is connected with a high-temperature side inlet of the convection section through a guide pipe section, and heat exchange elements are arranged in the radiation section and the convection section.
Preferably, a water-cooled wall I is arranged inside the gasification reaction chamber, and a refractory material layer is arranged on the inner wall of the gasification reaction chamber.
Preferably, the radiation section comprises an outer shell, an inner cylindrical water-cooling wall II and an outer cylindrical water-cooling wall III are coaxially arranged in the outer shell, a coaxially arranged central channel is formed inside the inner cylindrical water-cooling wall II, and an annular channel is formed between the inner cylindrical water-cooling wall II and the outer cylindrical water-cooling wall III.
More preferably, water wall fins which are arranged in the radial direction are arranged between the central channel and the second inner cylindrical water wall to form water screen evaporation surfaces, and a plurality of groups of water screen evaporation surfaces are uniformly distributed along the circumferential direction.
More preferably, a chilling ring is arranged at the slag discharging port of the radiation section, a slag pool is arranged at the lower part of the annular channel, and a slag discharging port is arranged at the bottom of the slag pool; the upper outlet of the annular channel is connected to the convection section by the conduit section.
Preferably, the pipe section is a reducing pipeline, and a water-cooled wall structure is arranged in the pipe section.
Preferably, the convection section comprises a pressure-bearing shell, and a gas return portion, an evaporation portion and a synthesis gas outlet portion are sequentially arranged in the pressure-bearing shell from top to bottom.
More preferably, a superheating part is also arranged between the gas return part and the evaporation part.
Further, the heat exchange element in the overheating part and the heat exchange element in the evaporation part adopt a spiral coil pipe which is arranged in a single-circle or multi-circle mode, and a water-cooled wall or a heat-resistant lining material is arranged outside the spiral coil pipe.
Furthermore, an inlet of the heat exchange element in the radiation section and an inlet of the heat exchange element in the evaporation part are both connected with a steam drum downcomer pipeline, an outlet of the heat exchange element in the radiation section and an outlet of the heat exchange element in the evaporation part are both connected to a steam drum through a steam drum riser, a steam drum saturated steam outlet pipeline is connected with an inlet of the heat exchange element in the overheating part, and an outlet of the heat exchange element in the overheating part is connected with an overheated steam output pipeline.
The utility model provides a when full pot waste flow gasification system used, gasification raw materials gasification in the gasification reaction chamber, and the synthetic gas of gasification reaction chamber export gets into the radiation section and releases heat, and the synthetic gas of radiation section export gets into the convection section through the pipe section and further retrieves the heat. The water in the radiation section and the evaporation part is heated by the synthesis gas and then evaporated into saturated steam, and the saturated steam enters the overheating part through a steam drum outlet saturated steam pipeline to be further heated to form superheated steam, and the superheated steam is output through a superheated steam output pipeline.
Compared with the prior art, the utility model provides a complete useless pot flow gasification system has following beneficial effect:
1. the heat contained in the gasification product at the outlet of the gasification furnace can be recovered to the maximum extent through the whole waste boiler process, and a large amount of steam is generated as a byproduct, so that the energy utilization efficiency of the whole system is improved.
2. The high-temperature sensible heat recovery device is adopted, and the whole heat transfer system is integrated into one device, so that the utilization rate of space is improved to the maximum extent.
3. The high-temperature gasification product directly enters the radiation section, and the sensible heat recovery and utilization of the gasification product are greatly improved.
4. The cylindrical water-cooled wall is adopted in the radiation section, and the water-cooled screen is added to the inner water-cooled wall, so that the heat exchange area is greatly increased, the heat exchange efficiency is improved, and the size of the equipment is reduced.
5. A chilling structure is added at the bottom of the radiation section, so that local overhigh temperature is prevented, and the slag bonding condition of the corner position is improved.
6. Saturated steam generated by the evaporation parts of the radiation section and the convection section can generate superheated steam by arranging the overheating parts on the convection section, and the system efficiency is greatly improved.
7. The gasified product enters the convection section through the radiation section, the temperature is reduced to be below 800 ℃, the caking property of particles is reduced, and the dust accumulation in the convection section is avoided.
8. The full waste boiler process gasification system provided by the invention is suitable for an entrained-flow bed gasification technology and a fluidized bed gasification technology, wherein the entrained-flow bed gasification technology comprises dry feeding and wet feeding.
Drawings
Fig. 1 is a schematic view of the overall structure of a full waste boiler process gasification system provided in this embodiment;
FIG. 2 is a schematic view of the internal structure of a gasification reaction chamber;
FIG. 3 is a schematic diagram of the internal structure of the radiation section;
fig. 4 is a schematic diagram of the internal structure of the convection section.
Detailed Description
The present invention will be further described with reference to the following specific examples.
Fig. 1 is the overall structure schematic diagram of the complete waste pot process gasification system provided by this embodiment, the complete waste pot process gasification system includes a gasification reaction chamber 1 and a complete waste pot process high-temperature sensible heat recovery device, the complete waste pot process high-temperature sensible heat recovery device includes a radiation section 2 and a convection section 3, a synthesis gas outlet of the gasification reaction chamber 1 is connected to a high-temperature side inlet of the radiation section 2, a high-temperature side outlet of the radiation section 2 is connected to a high-temperature side inlet of the convection section 3 through a conduit section 4, and heat exchange elements are arranged in the radiation section 2 and the convection section 3.
Referring to fig. 2, a water-cooled wall 11 is arranged inside the gasification reaction chamber 1, and a refractory material is arranged on the inner wall of the gasification reaction chamber 1.
Referring to fig. 3, the radiant section 2 includes an outer shell 21, a second inner cylindrical water-cooling wall 22 and a third outer cylindrical water-cooling wall 23 are coaxially arranged in the outer shell 21, a central passage 24 is coaxially arranged in the second inner cylindrical water-cooling wall 22, and an annular passage 25 is formed between the second inner cylindrical water-cooling wall 22 and the third outer cylindrical water-cooling wall 23.
And water wall fins 26 which are arranged in the radial direction are arranged between the central channel 24 and the second inner cylindrical water wall 22 to form water screen evaporation surfaces, and a plurality of groups of water screen evaporation surfaces are uniformly distributed along the circumferential direction.
Wherein, the inner cylindrical water-cooling wall two 22 is composed of tubes and fins.
A chilling ring 27 is arranged at the slag discharging port of the radiation section 2, a slag pool 28 is arranged at the lower part of the annular channel 25, and a slag discharging port 29 is arranged at the bottom of the slag pool 28.
The upper outlet of the annular channel 25 is connected to the convection section 3 by the duct section 4.
The pipe section 4 adopts a reducing type, and a cylindrical water-cooled wall structure is adopted in the pipe section.
The convection section 3 comprises a pressure-bearing shell and an inner part arranged in the pressure-bearing shell, and a gas return portion 31, an overheating portion 32 (arranged as required), an evaporation portion 33 and a synthesis gas outlet portion 34 are sequentially arranged in the pressure-bearing shell from top to bottom.
Referring to fig. 4, the heat exchange elements inside the superheating part 32 and the evaporating part 33 are in the form of a single-turn or multi-turn spiral coil 322. The outside of the spiral coil 322 is provided with a cylindrical water wall four 321 or a pressure-bearing shell of the convection section protected by a heat-resistant lining material.
The inlets of the inner cylindrical water-cooled wall II 22, the outer cylindrical water-cooled wall III 23 and the water-cooled wall fins 26 in the radiation section 2 are all connected with the steam drum downcomer pipe 5, and the inlets of the heat exchange elements (and the water-cooled wall IV 321, if any) in the evaporation part 33 are also connected with the steam drum downcomer pipe 5. The outlets of the inner cylindrical water wall II 22, the outer cylindrical water wall III 23 and the water wall fins 26 in the radiation section 2 are all connected with the inlets of the heat exchange elements in the overheating part 32 through a steam drum outlet saturated steam pipeline 6, and the outlets of the heat exchange elements (and the water wall IV 321, if any) in the evaporation part 33 are also connected with the inlets of the heat exchange elements in the overheating part 32 through the steam drum outlet saturated steam pipeline 6. The outlet of the heat exchange element in the superheating portion 32 is connected to the superheated steam output pipe 7.
The method for using the gasification system with the whole waste boiler process provided by this embodiment is described below by taking dry coal powder gasification reaction as an example.
Firstly, dry coal dust is gasified in the gasification reaction chamber 1, and the gasification product outlet parameters of the gasification reaction chamber 1 are shown in the following table:
the temperature of the synthesis gas at the outlet of the gasification reaction chamber 1 is 1650-1400 ℃, the synthesis gas enters the radiation section 2 for heat release, and the temperature of the synthesis gas is reduced to 700-800 ℃ after passing through the radiation section 2.
The synthesis gas at the outlet of the radiation section 2 enters the convection section 3 through the conduit section 4 to further recover heat, the gas flow direction is firstly folded to be parallel to the overheating part 32 and the evaporation part 33 through the gas return part 31 in the convection section 3, then the heat is released through the overheating part 32 and the evaporation part 33, finally the synthesis gas flows out through the synthesis gas outlet part 34, and the temperature of the synthesis gas outlet is about 200-350 ℃ after the synthesis gas passes through the convection section 3.
The water in the radiation section 2 and the evaporation part 33 is heated by the synthesis gas and evaporated into saturated steam, and enters the superheated part 32 through the drum outlet saturated steam pipeline 6 to be further heated to form superheated steam, and the superheated steam is output through the superheated steam output pipeline 7.
It should be understood that the terms of orientation of up, down, left, right, front, back, top, bottom, etc., referred to or may be referred to in this specification, are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed accordingly depending on the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the method of the present invention, and such modifications and additions are also considered to be within the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a full pot process gasification system which characterized in that: including gasification reaction chamber (1) and full pot waste flow high temperature sensible heat recovery unit, full pot waste flow high temperature sensible heat recovery unit includes radiation section (2) and convection current section (3), the synthetic gas exit linkage of gasification reaction chamber (1) the high temperature side entry of radiation section (2), the high temperature side export of radiation section (2) pass through pipe section (4) with the high temperature side entry linkage of convection current section (3), radiation section (2) with all be equipped with heat exchange element in convection current section (3).
2. The full-waste-boiler process gasification system of claim 1, wherein: the gasification reaction chamber (1) is internally provided with a first water-cooled wall (11), and the inner wall of the gasification reaction chamber (1) is provided with a refractory material layer.
3. The full-waste-boiler process gasification system of claim 1, wherein: the radiant section (2) comprises a shell (21), an inner layer cylindrical water-cooled wall II (22) and an outer layer cylindrical water-cooled wall III (23) which are coaxially arranged are arranged in the shell (21), a central channel (24) which is coaxially arranged is formed in the inner layer cylindrical water-cooled wall II (22), and an annular channel (25) is formed between the inner layer cylindrical water-cooled wall II (22) and the outer layer cylindrical water-cooled wall III (23).
4. The full-waste-boiler process gasification system of claim 3, wherein: and water-cooling wall fins (26) which are arranged in the radial direction are arranged between the central channel (24) and the inner cylindrical water-cooling wall II (22) to form water-cooling screen evaporation surfaces, and a plurality of groups of water-cooling screen evaporation surfaces are uniformly distributed along the circumferential direction.
5. The full-waste-boiler process gasification system of claim 3, wherein: a chilling ring (27) is arranged at the slag discharging port of the radiation section (2), a slag pool (28) is arranged at the lower part of the annular channel (25), and a slag discharging port (29) is arranged at the bottom of the slag pool (28); the upper outlet of the annular channel (25) is connected to the convection section (3) through the conduit section (4).
6. The full-waste-boiler process gasification system of claim 1 or 5, wherein: the pipe section (4) is a variable diameter type pipeline, and a water-cooled wall structure is arranged inside the pipe section (4).
7. The full-waste-boiler process gasification system of claim 1, wherein: the convection section (3) comprises a pressure-bearing shell, and a gas return part (31), an evaporation part (33) and a synthesis gas outlet part (34) are sequentially arranged in the pressure-bearing shell from top to bottom.
8. The full-waste-boiler process gasification system of claim 7, wherein: a superheating part (32) is also arranged between the gas return part (31) and the evaporation part (33).
9. The full-waste-boiler process gasification system of claim 8, wherein: the heat exchange elements in the overheating part (32) and the evaporation part (33) adopt a single-circle or multi-circle spiral coil (322), and a water-cooled wall four (321) is arranged outside the spiral coil (322).
10. The full-waste-boiler process gasification system of claim 8, wherein: the inlet of the heat exchange element in the radiation section (2) and the inlet of the heat exchange element in the evaporation part (33) are both connected with a steam drum downcomer pipeline (5), the outlet of the heat exchange element in the radiation section (2) and the outlet of the heat exchange element in the evaporation part (33) are both connected with the inlet of the heat exchange element in the overheating part (32) through a steam drum outlet saturated steam pipeline (6), and the outlet of the heat exchange element in the overheating part (32) is connected with an overheated steam output pipeline (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920280930.5U CN210176804U (en) | 2019-03-06 | 2019-03-06 | Full waste boiler flow gasification system |
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| CN201920280930.5U CN210176804U (en) | 2019-03-06 | 2019-03-06 | Full waste boiler flow gasification system |
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| CN210176804U true CN210176804U (en) | 2020-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109749787A (en) * | 2019-03-06 | 2019-05-14 | 上海锅炉厂有限公司 | A kind of full pot destroying process gasification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109749787A (en) * | 2019-03-06 | 2019-05-14 | 上海锅炉厂有限公司 | A kind of full pot destroying process gasification system |
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