CN202390399U - Pipe-type heat exchanger for biomass fuel gasification synthesis gas cooling system - Google Patents
Pipe-type heat exchanger for biomass fuel gasification synthesis gas cooling system Download PDFInfo
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- CN202390399U CN202390399U CN2011205614779U CN201120561477U CN202390399U CN 202390399 U CN202390399 U CN 202390399U CN 2011205614779 U CN2011205614779 U CN 2011205614779U CN 201120561477 U CN201120561477 U CN 201120561477U CN 202390399 U CN202390399 U CN 202390399U
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- synthetic gas
- insulated wall
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Abstract
The utility model provides a pipe-type heat exchanger for a biomass fuel gasification synthesis gas cooling system, which comprises a heated pipe (1), a boiler barrel (2) and a heat preservation wall (7). A heat release section of the heated pipe (1) is inserted in the boiler barrel (2), a heat absorption section of the heated pipe (1) is placed in the heat preservation wall (7), an inlet port (5) and an outlet port (6) are further welded on the heat preservation wall (7), and an ash falling bucket (4) is welded at the lower end of the heat preservation wall (7). The heat exchanger can meet requirements of a gasification system, and can absorb waste gas of synthesis gas simultaneously.
Description
Technical field
The utility model relates to waste heat recovery part in the cooling system of the high-temperature synthesis gas that produces behind the biomass fuel gasifying, specifically is meant heat-pipe heat exchanger in the synthetic gas cooling system that a kind of biomass fuel gasifying produces.
Background technology
Along with society growing to energy demand, as the fossil fuel in main energy sources source in rapid minimizing.Therefore, seek the focus that the alternative energy has become social common concern, wherein environmental pollution biomass fuel less, reproducible utilization has obtained using widely.Available biomass fuel mainly contains various agricultural wastes, like rice husk, all kinds of agricultural crop straws etc., forestry waste is arranged also, like branch bavin, tree root, waste and old wood and scrap stock etc.Biomass fuel gasifying is the very promising mode of utilizing in the method for various applying biological matter fuel.So-called gasification is meant the thermochemical process that solid or liquid fuel is transformed into geseous fuel, in this process, and in gasification installation, free oxygen or combine oxygen and carbon in the fuel to carry out thermal chemical reaction, the generation inflammable gas.The synthetic gas that biomass fuel gasifying produces can be done to concentrate after processing such as purification, cooling, compression or commercial fate is defeated and use, specifically can supply gas turbine power generation, air feed direct combustion, biodiesel synthesis etc.
The temperature of the synthetic gas that biomass fuel directly comes out after in vapourizing furnace, gasifying is higher.In order to make synthetic gas reach industrial request for utilization, just carry out to synthetic gas purify, processing such as compression, this just requires the processing of must lowering the temperature of pyritous synthetic gas.
At present, in the conventional gasification system, synthetic gas lowered the temperature to handle is generally water spray, during equipment work, in the circulation passage of synthetic gas, sprays water coolant and mixes with synthetic gas, and the decrease of temperature of synthetic gas is arrived in the purified synthesis gas equipment work TR.But the effect of water spray must cause the gas volume of synthetic gas to increase; This processing power that just requires to handle the treating plant of the synthetic gas after the cooling also requires to increase; Water coolant in service, the usage quantity of purifying waste water and later stage sewage load have also increased simultaneously, have obviously increased the construction input and the running cost of project.Like simple employing spray cooling, the great amount of heat energy that contains in the pyritous synthetic gas has also wasted, and this plays great reduction effect to whole efficiency utilization of gasification system and environmental-protecting performance.
Contain a certain amount of gasiform tar in the pyritous gasifying biomass synthetic gas; In the process of synthetic gas decrease of temperature; Gasiform tar can constantly become liquid condensation and go out; Stick to the equipment surface of synthetic air warp, particularly synthetic gas from 300 ℃ of intervals that drop to 150 ℃, the tar that freeze-outs account for that synthetic gas contains more than 90%.Synthetic gas has certain corrosive nature to metal simultaneously, and corrosive nature is especially obvious under the lower state of metal temperature.
Summary of the invention
The utility model technical problem to be solved is: be provided for the heat-pipe heat exchanger of biomass fuel gasifying synthetic gas cooling system, this interchanger can satisfy the gasification system requirement, can absorb the synthetic gas waste heat simultaneously.
The technical scheme that the utility model adopted is: the heat-pipe heat exchanger that is used for biomass fuel gasifying synthetic gas cooling system comprises heat pipe, drum and insulated wall; The heat release section of heat pipe is inserted in the drum; The endotherm section of heat pipe is placed in the insulated wall; Also be welded with import interface and discharge coupling on the insulated wall, the lower end of insulated wall is welded with ash dropping hopper.
Described heat-pipe heat exchanger, heat pipe adopts heat pipe, and its endotherm section adopts light-pipe structure.
Described heat-pipe heat exchanger, the contacted part of heat pipe and drum shell is with Sealed casing pipe outward.
Described heat-pipe heat exchanger, the insulated wall inboard is an insulating brick, the outside is the sealing steel plate.
Described heat-pipe heat exchanger also is provided with insulating cotton between insulating brick and the sealing steel plate.
Described heat-pipe heat exchanger, the pyramidal structure interface that the circumference that import interface, discharge coupling adopt steel plate to roll connects.
Described heat-pipe heat exchanger, ash dropping hopper adopt steel plate to roll circumference and connect the type ash bucket.
The advantage of the utility model is mainly reflected in following several respects:
(1) employing of heat-pipe heat exchanger can need not be sprayed water when reducing the temperature of synthetic gas in the said gasification cooling system, can not increase the synthetic gas gas volume, can reduce the construction input and the running cost of project.The more important thing is also fully to have absorbed the heat energy in the synthetic gas, improved total system thermo-efficiency and environmental-protecting performance.
(2) said heat-pipe heat exchanger overall tightness is good, compact overall structure, simple, and synthetic gas circulation resistance is little; Owing to the high cause of adopting heat pipes for heat transfer efficient, the heat transfer coefficient of said heat-pipe heat exchanger is bigger 2～3 times than isostructural waterpipe type interchanger, can obviously alleviate weight of equipment simultaneously.
What (3) heat pipe of said heat-pipe heat exchanger adopted is vertically arranged heat pipe; The heat pipe endotherm section surface metal temperature when equipment moves that contacts with synthetic gas is higher; Simultaneously suitable heat pipe structural arrangement; The synthetic gas that the sticks to heat pipe surface tar that condenses is discharged smoothly, also alleviated synthetic gas to corrosion of metal simultaneously.The thermo-efficiency and the stability of heat-pipe heat exchanger long-time running have been guaranteed.
(4) said heat-pipe heat exchanger Applicable temperature scope is wide; Under the prerequisite of considering the equipment construction cost; The operating temperature range that interchanger is suitable for can be in 100～500 ℃, and according to arts demand, said heat-pipe heat exchanger even working temperature can be in 50～800 ℃.
(5) said heat-pipe heat exchanger external insulation is little insulating cotton of accumulation of heat and insulating brick, makes that the equipment integral heat storage capacity is little, on-the-spot start and to stop speed fast, and normal operation input reduces running cost fast.
Description of drawings
Fig. 1 is the heat-pipe heat exchanger synoptic diagram in a kind of biomass fuel gasifying synthetic gas cooling system.
Fig. 2 is the A-A sectional structure synoptic diagram among Fig. 1.
Among the figure, 1: heat pipe; 2: drum; 3: Sealed casing pipe; 4: ash dropping hopper; 5: the import interface; 6: discharge coupling; 7: insulated wall.
Embodiment
So-called heat pipe is a kind of heat transfer element with high heat conductivility, and it transmits heat through the evaporation of liquid in the Totally enclosed vacuum pipe with condensing, and it utilizes fluid principles such as capillarity, plays similar freezer compressor refrigerating effect.Drink series of advantages such as reversibility remotely transferring, thermostatic characteristics (controlled heat pipe), thermal diode and thermoswitch performance but have very high thermal conductivity, good isothermal, heat flow density mutability, direction of heat flow, and have heat transfer efficiency height, compact construction, fluid by the interchanger that heat pipe is formed and hinder advantages such as damage is little.Because its special heat transfer characteristic, thereby may command pipe surface temperature are avoided dew point corrosion.
Said heat-pipe heat exchanger mainly is applicable to synthetic gas temperature lower region, not only can discharge the tar that synthetic gas freeze-outs smoothly, can also effectively alleviate the metallic corrosion effect of synthetic gas to equipment.Its device structure is simple, reliable, in light weight, installation and maintenance convenient, and the heat energy efficiency that absorbs simultaneously in the synthetic gas is high.
The whole horizontal type structure that adopts of the heat-pipe heat exchanger that the utility model designed, the synthetic gas horizontal flow mainly comprises heat pipe (heat pipe), drum, Sealed casing pipe, import interface, discharge coupling, ash dropping hopper, insulated wall etc.Said interchanger can be designed to hot water or steam-type interchanger by arts demand.Said heat pipe (heat pipe) vertically arranges that along row synthetic gas is transverse flow between said heat pipe hypomere (endotherm section), and said heat pipe epimere (heat release section) inserts in the drum, is furnished with entrance of cooling water and hot water (or steam) outlet on the said drum.For avoiding causing metal fever stress because of big temperature head occurring, heat pipe and drum junction are furnished with Sealed casing pipe.Said heat pipe hypomere is that synthetic air circulation passage both sides are furnished with the thermal-insulating sealing wall; Said insulated wall employing density is little, the insulating cotton and the insulating brick of good heat insulating; Not only can alleviate weight of equipment; Also can improve simultaneously the heat absorption efficiency of said interchanger, said insulated wall outer gland sealing welding steel guarantees said interchanger overall tightness.Said heat pipe lower disposed has ash dropping hopper, and during the interchanger operation, the tar tar that synthetic gas freeze-outs in temperature descends can flow downward along heat pipe and drop onto in the ash dropping hopper, discharges interchanger thereupon.The pyramidal structure that synthetic gas adopts circumference to connect into and out of interface, cast insulation or refractory castable in the import interface inside.The whole structure of steel plate sealing weld that adopts of interchanger seals.
When said heat-pipe heat exchanger moved, heat pipe (heat pipe) hypomere absorbed the heat energy in the synthetic gas, reduced the temperature of synthetic gas; Water coolant in the drum has absorbed the synthetic gas heat energy of emitting on the heat pipe (heat pipe) and has become hot water or steam, and hot water or steam are drawn in drum again, uses so that technology or life to be provided.
Because of said heat pipe (heat pipe) hypomere does not directly contact with water coolant, therefore said heat pipe surface can keep comparatively high temps.So also just improved the temperature that sticks to its surperficial tar; Reduced the mobile viscosity of tar; Said heat pipe (heat pipe) lower end is a light-pipe structure vertically downward simultaneously; Have no the tar of stopping mobile annex, this just can make adherent tar discharge outside the said heat-pipe heat exchanger dirty the falling in the ash bucket of the effect of gravity.It also is very favourable to alleviating synthetic gas about to corrosion of metal that said heat pipe surface keeps comparatively high temps.
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in detail.
Heat-pipe heat exchanger in the biomass fuel gasifying cooling system shown in the figure; The whole horizontal type structure that adopts; The synthetic gas horizontal flow comprises heat pipe (heat pipe) 1, and some heat pipes 1 are vertically arranged along row; High-temperature synthesis gas is in 1 time intersegmental transverse flow of heat pipe, and heat pipe 1 hypomere is a light-pipe structure; Insert in the drum 2 heat pipe 1 upper end, and for avoiding causing metal fever stress because of big temperature head occurring, heat pipe 1 is furnished with Sealed casing pipe 3 with drum 2 junctions.Be furnished with entrance of cooling water and hot water (or steam) outlet on the drum 2.The tube bank both sides that heat pipe 1 is formed are provided with insulated wall 7, and insulated wall 7 is an insulating brick with the synthetic gas contact surface, and outside integral sealing welding steel guarantees the overall tightness of said interchanger, can arrange insulating cotton by design demand between insulating brick and the sealing steel plate.The pyramidal structure interface that the circumference that the synthetic gas import interface 5 of said heat-pipe heat exchanger, discharge coupling 6 adopt steel plate to roll connects; Cast insulation or refractory castablies in import interface 5 inside, import interface 5, discharge coupling 6 all weld with the sealing steel plate sealing in insulated wall 7 outsides.Heat pipe 1 lower disposed has steel plate to roll circumference to connect type ash dropping hopper 4, ash dropping hopper 4 also with the sealing steel plate sealing welding in insulated wall 7 outsides.
When said heat-pipe heat exchanger moved, heat pipe 1 hypomere was an endotherm section, and the upper end is a heat release section.Heat pipe 1 hypomere has absorbed the heat energy in the synthetic gas, reduces the temperature of synthetic gas; The heat energy that water coolant absorption heat pipe 1 upper end in the drum 2 emits becomes hot water or steam, and hot water or steam are drawn in drum 2 again, uses so that technology or life to be provided.
The process that the mobile synthetic gas descends in temperature in the interchanger tar that constantly freeze-outs; Heat pipe 1 hypomere does not directly contact with drum 2 internal cooling water; Therefore 1 time section surface of heat pipe can keep the higher metal temperature; This has also just improved simultaneously and has sticked to its surperficial tar temperature; The raising of temperature can reduce the mobile viscosity of tar; Heat pipe 1 lower end is a light-pipe structure vertically downward simultaneously, has no the annex that increases the tar resistance to flow, and this just can make the adherent tar
that particularly is adjacent to heat pipe 1 surface discharge outside the interchanger dirty the falling in the ash dropping hopper 4 of the effect of gravity again.Heat pipe 1 surface of cleaning is very important to the heat exchange efficiency that improves interchanger, and keeping comparatively high temps with heat pipe 1 surface of synthetic gas contact position also is very favourable to alleviating synthetic gas about to corrosion of metal.
The utility model when work, heat pipe 1 can effectively absorb synthetic gas in heat energy, improved the overall thermal efficient and the feature of environmental protection of system.Heat pipe 1 layout and self-characteristic can effectively be discharged tar and alleviated metallic corrosion simultaneously, can guarantee the stability of equipment long-time running.
Claims (7)
1. the heat-pipe heat exchanger that is used for biomass fuel gasifying synthetic gas cooling system; It is characterized in that: it comprises heat pipe (1), drum (2) and insulated wall (7); The heat release section of heat pipe (1) is inserted in the drum (2); The endotherm section of heat pipe (1) is placed in the insulated wall (7), also is welded with import interface (5) and discharge coupling (6) on the insulated wall (7), and the lower end of insulated wall (7) is welded with ash dropping hopper (4).
2. heat-pipe heat exchanger according to claim 1 is characterized in that: heat pipe (1) adopts heat pipe, and its endotherm section adopts light-pipe structure.
3. heat-pipe heat exchanger according to claim 1 is characterized in that: heat pipe (1) is with Sealed casing pipe (3) outward with the contacted part of drum (2) stack shell.
4. heat-pipe heat exchanger according to claim 1 is characterized in that: insulated wall (7) is inboard to be insulating brick, and the outside is the sealing steel plate.
5. heat-pipe heat exchanger according to claim 4 is characterized in that: also be provided with insulating cotton between insulating brick and the sealing steel plate.
6. heat-pipe heat exchanger according to claim 1 is characterized in that: the pyramidal structure interface that the circumference that import interface (5), discharge coupling (6) adopt steel plate to roll connects.
7. heat-pipe heat exchanger according to claim 1 is characterized in that: ash dropping hopper (4) adopts steel plate to roll circumference and connects the type ash bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205614779U CN202390399U (en) | 2011-12-29 | 2011-12-29 | Pipe-type heat exchanger for biomass fuel gasification synthesis gas cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205614779U CN202390399U (en) | 2011-12-29 | 2011-12-29 | Pipe-type heat exchanger for biomass fuel gasification synthesis gas cooling system |
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| Publication Number | Publication Date |
|---|---|
| CN202390399U true CN202390399U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205614779U Expired - Lifetime CN202390399U (en) | 2011-12-29 | 2011-12-29 | Pipe-type heat exchanger for biomass fuel gasification synthesis gas cooling system |
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| CN (1) | CN202390399U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102925165A (en) * | 2012-11-15 | 2013-02-13 | 上海理工大学 | Afterheat recovery system for raw coke oven gas of coke oven ascension pipe |
| WO2013097536A1 (en) * | 2011-12-29 | 2013-07-04 | 武汉凯迪工程技术研究总院有限公司 | Process for cooling and washing biomass syngas and system thereof |
-
2011
- 2011-12-29 CN CN2011205614779U patent/CN202390399U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013097536A1 (en) * | 2011-12-29 | 2013-07-04 | 武汉凯迪工程技术研究总院有限公司 | Process for cooling and washing biomass syngas and system thereof |
| CN102925165A (en) * | 2012-11-15 | 2013-02-13 | 上海理工大学 | Afterheat recovery system for raw coke oven gas of coke oven ascension pipe |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |
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| CX01 | Expiry of patent term |