CN103013579B - Integrated sarciniform radiation preheating hybrid heat recovery device with flue gas chilling function - Google Patents
Integrated sarciniform radiation preheating hybrid heat recovery device with flue gas chilling function Download PDFInfo
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- CN103013579B CN103013579B CN201210529740.5A CN201210529740A CN103013579B CN 103013579 B CN103013579 B CN 103013579B CN 201210529740 A CN201210529740 A CN 201210529740A CN 103013579 B CN103013579 B CN 103013579B
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- 230000005855 radiation Effects 0.000 title claims abstract description 187
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000003546 flue gas Substances 0.000 title claims abstract description 43
- 238000011084 recovery Methods 0.000 title abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 71
- 239000002893 slag Substances 0.000 claims abstract description 49
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 21
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 174
- 239000006200 vaporizer Substances 0.000 claims description 63
- 238000010791 quenching Methods 0.000 claims description 52
- 238000012546 transfer Methods 0.000 claims description 51
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims 6
- 239000003595 mist Substances 0.000 claims 1
- 239000003245 coal Substances 0.000 abstract description 12
- 238000002309 gasification Methods 0.000 abstract description 10
- 239000002918 waste heat Substances 0.000 abstract description 10
- 238000010248 power generation Methods 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 9
- 239000002956 ash Substances 0.000 description 8
- 230000035939 shock Effects 0.000 description 7
- 239000012528 membrane Substances 0.000 description 5
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000003818 cinder Substances 0.000 description 3
- 239000010883 coal ash Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 230000004523 agglutinating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- 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]
-
- 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
-
- 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
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to an integrated sarciniform radiation preheating hybrid heat recovery device with a flue gas chilling function. High-temperature synthesis gas and melting slag enter a radiation heat exchange component from a synthesis gas inlet of the device and enter a gas mixer chamber of a flue gas chilling component to be ventilated and cooled after radiation heat exchange, then solid coal slag enters a slag bath, and the synthesis gas is reflexed upwards to enter a convection heat exchange component, flows through an evaporator, an overheater and a coal economizer in sequence to be heat-exchanged and cooled, and then is discharged from a synthesis gas outlet. According to the invention, radiation heat exchange, flue gas chilling and convection heat exchange are combined effectively; the device can be applied to an IGCC (integrated gasification combined cycle) power generation system; and sensible heat of rough synthesis gas is absorbed to generate high pressure steam or medium pressure steam for power generation, so that the integral energy utilization ratio is improved greatly, the energy recovery and utilization ratio is high, the integral size of a waste heat boiler is reduced effectively, manufacturing, transportation and mounting are more convenient, and the problem of dust deposition of a convection heat exchange face can be eliminated.
Description
Technical field
The present invention relates to the hot vapourizing furnace of Coal Gasification Technology, particularly a kind of hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench.
Background technology
Integrated gasification combined cycle for power generation system (IGCC) can realize coal-firing efficient, clean and variation utilization, is also future development coal-based power generation CO
2zero release---i.e. one of the core technology of " green coal electricity ".In IGCC power generation system, waste heat boiler is the sensible heat key equipment of recycling and the substantial equipment gasifying in island, waste heat boiler will make heating gas efficiency reach 90～95% to the recycling of coal gas of high temperature, dross sensible heat, generating efficiency reaches 42～45%, and the running condition of waste heat boiler will directly affect available rate and the whole generating efficiency of IGCC power generation system.
In existing entrained flow bed gasification technology, the heat that adopts waste heat boiler to reclaim high-temperature synthesis gas generally has two kinds of modes: the powdered coal pressuring gasified technology of air flow bed that Yi Shiyi Shell company is representative, circulation cold air returns to the outlet of vapourizing furnace high-temperature synthesis gas by synthetic gas Quench to 700～750 ℃, and then enters convection current exhaust-heat boiler heat exchange by-product middle pressure steam.The coal water slurry gasification technique that another kind Shi Yi GE company is representative, high-temperature synthesis gas sensible heat adopts the mode of radiant boiler+counter current boiler to reclaim, by-product high-pressure saturated steam.But also there is the problems such as complex structure, work-ing life is shorter, failure rate is high in waste heat boiler of the prior art, is mainly manifested in:
(1) Shell bed pulverized coal gasification technology adopts the circulation cold air chilling high-temperature synthesis gas of 1.3～1.5 times, increased the size of convection current exhaust-heat boiler and follow-up synthetic gas dust removal installation thereof, increased the investment of equipment, synthetic gas recycle compressor has increased the energy consumption of gasification installation simultaneously; Due to counter current boiler dust stratification, reduced the heat transfer effect of counter current boiler, for guaranteeing that heat exchange need to add than the more Quench gas of design Quench tolerance.
(2) the full cement sensible heat recovery system of synthetic gas in GE coal water slurry gasification technique is comprised of radiation waste heat boiler and two equipment of convection current exhaust-heat boiler, and facility investment is large, takes up room large, and simultaneity factor reliability of operation is also because the complicacy of equipment is affected; Radiant boiler synthetic gas temperature shortage regulating measure causes counter current boiler dust stratification to stop up simultaneously.
Summary of the invention
The present invention is directed to defect and the deficiency of vapourizing furnace waste heat boiler of the prior art, the hybrid heat reclamation device of integrated pencil radiant boiler preboiler with flue gas Quench is provided, advantage in conjunction with waste heat boiler in Shell bed pulverized coal gasification technology and GE coal water slurry gasification technology, reach abundant recovery high-temperature synthesis gas and sensible heat that slag is with, reduce investment and save energy, improve the object of thermo-efficiency.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows:
The hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench, it is characterized in that: comprise pressure housing, synthetic gas entrance, radiation heat transfer assembly, flue gas Quench assembly, convective heat exchange assembly, slag bath, syngas outlet, synthetic gas entrance is positioned at the top of pressure housing, and syngas outlet is positioned at the upper end of pressure housing sidewall; Radiation heat transfer assembly is fixed at the top in pressure housing, with the abundant heat exchange of gas with heat; Flue gas Quench assembly, convective heat exchange assembly are all fixedly installed on the bottom in pressure housing, and convective heat exchange assembly is between flue gas Quench assembly and pressure housing; Slag bath is arranged at the bottom in pressure housing, and the bottom of slag bath and the bottom of pressure housing form slag-drip opening jointly; Radiation heat transfer assembly, flue gas Quench assembly, convective heat exchange assembly, slag bath are positioned at pressure housing and form one.
Described synthetic gas entrance is a long narrow passage, and the inwall of this synthetic gas entrance is refractory liner.
Described radiation heat transfer assembly comprises radiation water wall and radiation screen, and radiation water wall is comprised of radiation water wall upper collecting chamber, radiation water wall lower header, radiation water wall water inlet pipe, radiation water wall fairlead and radiation water wall surface.A plurality of standpipes be arranged in parallel, surround columniform cavity, form membrane type radiation water wall, between two adjacent standpipes by being welded to connect.The upper end of each standpipe is communicated with radiation water wall upper collecting chamber, and the lower end of each standpipe is communicated with radiation water wall lower header.One end of radiation water wall water inlet pipe and pressure housing are affixed and be located at outside, the other end and the radiation water wall upper collecting chamber UNICOM of pressure housing, one end of radiation water wall fairlead and the upper cover of pressure housing is affixed, the other end and radiation water wall upper collecting chamber UNICOM.
Described radiation heat transfer assembly comprises radiation water wall and radiation screen, and radiation water wall is the cylindrical wall that the standpipe that arranged by several parallel longitudinals surrounds, and two adjacent standpipes are by being welded to connect, and the centre of cylindrical wall is radiation heat transfer chamber; Radiation heat transfer assembly also comprises radiation water wall upper collecting chamber, radiation water wall lower header, radiation water wall water inlet pipe, radiation water wall fairlead, radiation water wall upper collecting chamber is communicated with the upper end of each standpipe, radiation water wall lower header is communicated with the lower end of each standpipe, one end of radiation water wall water inlet pipe is affixed with pressure housing and be located at the outside of pressure housing, the other end of radiation water wall water inlet pipe is communicated with radiation water wall upper collecting chamber, and one end of radiation water wall fairlead is affixed with the upper cover of pressure housing, the other end is communicated with radiation water wall upper collecting chamber.
Described radiation screen is formed by several standpipes row, and all standpipe rows outwards disperse and are distributed in radiation heat transfer chamber with the center of heat reclamation device, and each standpipe row is formed by some standpipes, and adjacent two standpipes of standpipe row are close to setting; Radiation heat transfer assembly also comprises radiation screen upper collecting chamber, radiation screen lower header, radiation screen water inlet pipe, radiation screen fairlead, the lower end of radiation screen heating surface is communicated with radiation screen lower header, the upper end of radiation screen heating surface is communicated with radiation screen upper collecting chamber, radiation screen water inlet pipe and radiation screen fairlead are communicated with radiation screen lower header and radiation screen upper collecting chamber respectively, and are drawn out to outside pressure housing.
Described convective heat exchange assembly comprises convective heat exchange water wall, vaporizer, superheater and economizer, vaporizer, superheater and economizer distribute from the bottom up successively, the cylindrical wall that the standpipe that convective heat exchange water wall is arranged by several parallel longitudinals surrounds, two adjacent standpipes are by being welded to connect, and vaporizer, superheater and economizer are positioned at the centre of cylindrical wall.
Described convective heat exchange water wall also comprises convective heat exchange water wall upper collecting chamber, convective heat exchange water wall lower header, convective heat exchange water wall water inlet pipe, convective heat exchange water wall fairlead, the upper end of convective heat exchange water wall is communicated with convective heat exchange water wall upper collecting chamber, the lower end of convective heat exchange water wall is communicated with convective heat exchange water wall lower header, convective heat exchange water wall water inlet pipe is communicated with convective heat exchange water wall lower header, and convective heat exchange water wall fairlead is communicated with convective heat exchange water wall upper collecting chamber; Convective heat exchange water wall water inlet pipe and convective heat exchange water wall fairlead all extend to outside pressure housing.
Described vaporizer, superheater and economizer are formed by one group of spiral pipe respectively, and every group of spiral pipe comprises respectively four helical layer endless tubes, between every two-layer spiral endless tube, have certain distance, every helical layer endless tube by pipe closely around forming.
Described vaporizer also comprises vaporizer upper collecting chamber, vaporizer lower header, vaporizer water inlet pipe, vaporizer fairlead, the upper end that forms the spiral pipe of vaporizer is communicated with vaporizer upper collecting chamber, the lower end that forms the spiral pipe of vaporizer is communicated with vaporizer lower header, vaporizer water inlet pipe is communicated with vaporizer lower header, and vaporizer fairlead is communicated with vaporizer upper collecting chamber; Described superheater also comprises superheater upper collecting chamber, superheater lower header, superheater water inlet pipe, superheater fairlead, the upper end that forms the spiral pipe of superheater is communicated with superheater upper collecting chamber, the lower end that forms the spiral pipe of superheater is communicated with superheater lower header, superheater water inlet pipe is communicated with superheater lower header, and superheater fairlead is communicated with superheater upper collecting chamber; Described economizer also comprises economizer upper collecting chamber, economizer lower header, economizer water inlet pipe, economizer fairlead, and the upper end that forms the spiral pipe of superheater is communicated with economizer upper collecting chamber; The lower end that forms the spiral pipe of economizer is communicated with economizer lower header, and economizer water inlet pipe is communicated with economizer lower header, and economizer fairlead is communicated with economizer upper collecting chamber; Vaporizer water inlet pipe, vaporizer fairlead, superheater water inlet pipe, superheater fairlead, economizer water inlet pipe, economizer fairlead all extend to outside pressure housing.
Described flue gas Quench assembly comprises chiller inlet pipe, shock chamber, and the upper part cavity in slag bath, as shock chamber, around distributes according to even circumferential in shock chamber outside with pressure housing, can set as required two, or four, or the six roots of sensation, or the Quench gas inlet pipe such as eight.
The upper end of described slag bath is connected with the lower end of convective heat exchange water wall, and the lower end of slag bath lower end and pressure housing is connected to form slag-drip opening, depending on coal ash slagging scorification situation, can install dregs breaker additional.
Principle of work of the present invention is as follows:
When synthetic gas and the melting slag of high temperature goes out after vapourizing furnace, the long narrow synthetic gas entrance by this device top enters radiation heat transfer assembly, in radiation heat transfer chamber, high-temperature synthesis gas stream and melting slag is carried out to radiation water-cooled cooling;
When high-temperature synthesis gas stream enters heat reclamation device from synthetic gas entrance with melting slag, by long narrow synthetic gas entrance, enter radiation heat transfer assembly, in radiation heat transfer chamber, high-temperature synthesis gas stream and melting slag are carried out to radiation water-cooled cooling;
Then, high-temperature synthesis gas stream and melting slag continue to enter flue gas Quench assembly downwards, mix with the Quench gas coming from the outside;
After lowering the temperature rapidly by flue gas Quench assembly, lime-ash enters in slag bath, melting slag mixes sharply cooling with water, form the solid-state lime-ash of high rigidity, solid-state lime-ash is discharged with water, synthetic air-flow reflexed, upwards by convective heat exchange assembly, flows through vaporizer, superheater, economizer and carries out heat exchange cooling successively, by syngas outlet, is discharged.
Beneficial effect of the present invention is as follows:
The hybrid heat reclamation device of integrated pencil radiant boiler preboiler with flue gas Quench provided by the invention can be used for IGCC power generation system, the sensible heat generation high pressure steam or the middle pressure steam that absorb crude synthesis gas are used for generating, whole energy utilization rate improves greatly, has advantages of that energy recovery utilization ratio is high;
The hybrid heat reclamation device of integrated pencil radiant boiler preboiler with flue gas Quench provided by the invention, radiation heat transfer, flue gas Quench, convective heat exchange are effectively combined, effectively reduced waste heat boiler overall dimensions, manufactured, transport and install more for convenience.
Accompanying drawing explanation
Fig. 1 is cross-sectional schematic of the present invention;
Fig. 2 is the A-A cross section cross-sectional schematic in Fig. 1 of the present invention;
Fig. 3 is the B-B cross section cross-sectional schematic in Fig. 1 of the present invention;
Fig. 4 is the partial schematic diagram of the I portion in Fig. 1 of the present invention;
Wherein, Reference numeral is: 1 synthetic gas entrance, 1-1 refractory liner, 2 radiation heat transfer assemblies, 3 slag baths, cinder notch under 3-1, 4 flue gas Quench assemblies, 4-1 shock chamber, 5 convective heat exchange assemblies, 6 pressure housings, 7 vaporizers, 7-1 vaporizer upper collecting chamber, 7-2 vaporizer lower header, 7-3 vaporizer water inlet pipe, 7-4 vaporizer fairlead, 8 superheaters, 8-1 superheater upper collecting chamber, 8-2 superheater lower header, 8-3 superheater water inlet pipe, 8-4 superheater fairlead, 9 economizers, 9-1 economizer upper collecting chamber, 9-2 next part economizer case, 9-3 economizer water inlet pipe, 9-4 economizer fairlead, 10 convective heat exchange water wall, 10-1 convective heat exchange water wall upper collecting chamber, 10-2 convective heat exchange water wall lower header, 10-3 convective heat exchange water wall water inlet pipe, 10-4 convective heat exchange water wall fairlead, 11 radiation screens, 11-1 radiation screen upper collecting chamber, 11-2 radiation screen lower header, 11-3 radiation screen water inlet pipe, 11-4 radiation screen fairlead, 11-5 radiation screen heating surface, 12 radiation water wall, 12-1 radiation water wall upper collecting chamber, 12-2 radiation water wall lower header, 12-3 radiation water wall fairlead, 12-4 radiation water wall water inlet pipe, 12-5 radiation water wall surface, 12-6 standpipe, 13 syngas outlet, 14 spiral pipes, 15 spiral endless tubes.
Embodiment
As Figure 1-4, the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench, comprises synthetic gas entrance 1, radiation heat transfer assembly 2, flue gas Quench assembly 4, slag bath 3, convective heat exchange assembly 5, pressure housing 6, syngas outlet 13.
Synthetic gas entrance 1 is positioned at the top of pressure housing 6, and syngas outlet 13 is positioned at the upper end of pressure housing 6 sidewalls, and slag bath 3 is arranged at the bottom in pressure housing 6, cinder notch 3-1 under common formation the in bottom of the bottom of slag bath 3 and pressure housing 6; Radiation heat transfer assembly 2 is fixed at the top in pressure housing 6, with the abundant heat exchange of gas with heat; Flue gas Quench assembly 4 is fixedly installed on the upper end of slag bath 3, and is positioned at the lower end of radiation heat transfer assembly 2, convective heat exchange assembly 5; Radiation heat transfer assembly 2, convective heat exchange assembly 5, flue gas Quench assembly 4, slag bath 3 are positioned at pressure housing 6 formation one.
Described synthetic gas entrance 1 is a long narrow passage, and the inwall of this synthetic gas entrance 1 is refractory liner 1-1.
Described radiation heat transfer assembly 2 comprises radiation water wall 12 and radiation screen 11, radiation screen 11 corresponding to radiation water wall 12 with radiation water wall surface 12-5 in, radiation water wall 12 is cylindrical walls that the standpipe 12-6 that arranged by several parallel longitudinals surrounds, two adjacent standpipe 12-6 are by being welded to connect, and the centre of cylindrical wall is radiation heat transfer chamber, radiation heat transfer assembly 2 also comprises radiation water wall upper collecting chamber 12-1, radiation water wall lower header 12-2, radiation water wall water inlet pipe 12-4, radiation water wall fairlead 12-3, radiation water wall upper collecting chamber 12-2 is communicated with the upper end of each standpipe 12-6, radiation water wall lower header 12-2 is communicated with the lower end of each standpipe 12-6, one end of radiation water wall water inlet pipe 12-4 and pressure housing 6 are affixed and be located at the outside of pressure housing 6, the other end of radiation water wall water inlet pipe 12-4 is communicated with radiation water wall upper collecting chamber 12-1, one end of radiation water wall fairlead 12-3 and the upper cover of pressure housing 6 are affixed, the other end is communicated with radiation water wall upper collecting chamber 12-1.
Described radiation screen 11 is formed by several standpipes row, and all standpipe rows outwards disperse and are distributed in radiation heat transfer chamber with the center of heat reclamation device, and each standpipe row is formed by some standpipes, and adjacent two standpipes of standpipe row are close to setting; Radiation heat transfer assembly 2 also comprises radiation screen upper collecting chamber 11-1, radiation screen lower header 11-2, radiation screen water inlet pipe 11-3, radiation screen fairlead 11-4, the lower end of radiation screen heating surface 11-5 is communicated with radiation screen lower header 11-2, the upper end of radiation screen heating surface 11-5 is communicated with radiation screen upper collecting chamber 11-1, radiation screen water inlet pipe 11-3 and radiation screen fairlead 11-4 are communicated with radiation screen lower header 11-2 and radiation screen upper collecting chamber 11-1 respectively, and are drawn out to outside pressure housing 6.
Described convective heat exchange assembly 5 comprises convective heat exchange water wall 10, vaporizer 7, superheater 8 and economizer 9, vaporizer 7, superheater 8 and economizer 9 distribute from the bottom up successively, the cylindrical wall that the standpipe that convective heat exchange water wall 10 is arranged by several parallel longitudinals surrounds, two adjacent standpipes are by being welded to connect, and vaporizer 7, superheater 8 and economizer 9 are positioned at the centre of cylindrical wall.
Described convective heat exchange water wall 10 also comprises convective heat exchange water wall upper collecting chamber 10-1, convective heat exchange water wall lower header 10-2, convective heat exchange water wall water inlet pipe 10-3, convective heat exchange water wall fairlead 10-4, the upper end of convective heat exchange water wall 10 is communicated with convective heat exchange water wall upper collecting chamber 10-1, the lower end of convective heat exchange water wall 10 is communicated with convective heat exchange water wall lower header 10-2, convective heat exchange water wall water inlet pipe 10-3 is communicated with convective heat exchange water wall lower header 10-2, convective heat exchange water wall fairlead 10-4 is communicated with convective heat exchange water wall upper collecting chamber 10-1, convective heat exchange water wall water inlet pipe 10-3 and convective heat exchange water wall fairlead 10-4 all extend to outside pressure housing 6.
Described vaporizer 7, superheater 8 and economizer 9 are formed by one group of spiral pipe 14 respectively, every group of spiral pipe 14 comprises respectively four helical layer endless tubes 15, between every two-layer spiral endless tube 15, have certain distance, every helical layer endless tube 15 by pipe closely around forming.
Described vaporizer 7 also comprises vaporizer upper collecting chamber 7-1, vaporizer lower header 7-2, vaporizer water inlet pipe 7-3, vaporizer fairlead 7-4, the upper end that forms the spiral pipe 14 of vaporizer 7 is communicated with vaporizer upper collecting chamber 7-1, the lower end that forms the spiral pipe 14 of vaporizer 7 is communicated with vaporizer lower header 7-2, vaporizer water inlet pipe 7-3 is communicated with vaporizer lower header 7-2, and vaporizer fairlead 7-4 is communicated with vaporizer upper collecting chamber 7-1; Described superheater 8 also comprises superheater upper collecting chamber 8-1, superheater lower header 8-2, superheater water inlet pipe 8-3, superheater fairlead 8-4, the upper end that forms the spiral pipe 14 of superheater 8 is communicated with superheater upper collecting chamber 8-1, the lower end that forms the spiral pipe 14 of superheater 8 is communicated with superheater lower header 8-2, superheater water inlet pipe 8-3 is communicated with superheater lower header 8-2, and superheater fairlead 8-4 is communicated with superheater upper collecting chamber 8-1; Described economizer 9 also comprises economizer upper collecting chamber 9-1, economizer lower header 9-2, economizer water inlet pipe 9-3, economizer fairlead 9-4, and the upper end that forms the spiral pipe 14 of superheater 9 is communicated with economizer upper collecting chamber 9-1; The lower end that forms the spiral pipe 14 of economizer 9 is communicated with economizer lower header 9-2, and economizer water inlet pipe 9-3 is communicated with economizer lower header 9-2, and economizer fairlead 9-4 is communicated with economizer upper collecting chamber 9-1; Vaporizer water inlet pipe 7-3, vaporizer fairlead 7-4, superheater water inlet pipe 8-3, superheater fairlead 8-4, economizer water inlet pipe 9-3, economizer fairlead 9-4 all extend to outside pressure housing 6.
Described flue gas Quench assembly 4 comprises chiller inlet pipe, the 4-1 of shock chamber, upper part cavity in slag bath 3 is as the 4-1 of shock chamber, at the 4-1 of shock chamber, around according to even circumferential, distribute and pressure housing 6 outsides, can set as required two, or four, or the six roots of sensation, or the Quench gas inlet pipe such as eight.
The upper end of described slag bath 3 is connected with the lower end of convective heat exchange water wall 10, and the lower end of slag bath 3 lower ends and pressure housing 6 is connected to form lower cinder notch 3-1, depending on coal ash slagging scorification situation, can install dregs breaker additional.
Principle of work of the present invention is as follows:
Described heat reclamation device is the hybrid heat reclamation device of a kind of pencil, and radiation heat transfer is at internal layer, and flue gas Quench is positioned at radiation heat transfer bottom, and convective heat exchange is positioned at the skin of radiation heat transfer.When high-temperature synthesis gas stream goes out after vapourizing furnace with grey slag (approximately 1400 ℃ of temperature), by long narrow synthetic gas entrance 1, with higher gas velocity, enter radiation heat transfer part, pass through radiation heat transfer chamber downwards by after high-order heat recuperation, enter flue gas Quench assembly 4, mix with the Quench gas coming from the outside, after temperature reduces rapidly, lime-ash enters in slag bath 3, and air-flow reflexed is upwards by convective heat exchange assembly 5, further cooling down, and reclaim a large amount of sensible heats.This heat reclamation device effectively combines radiation heat transfer, flue gas Quench and convective heat exchange, and equipment volume reduces greatly, and has as much as possiblely reclaimed sensible heat that high-temperature synthesis gas is with.
Radiation heat transfer part is comprised of the radiation heat transfer screen in membrane wall chamber and chamber.High-temperature synthesis gas and grey slag enter in water wall chamber, in the mode of radiative transfer, heat are passed to the membrane wall of surrounding.Because circulation area expands, grey slag under airflow function to surrounding splash, from leaving channel to arriving the process of membrane wall, sufficiently cooled, solidify and lose agglutinating value(of coal), under action of gravity, move downward.Radiation heat transfer screen in water wall chamber has increased radiation heat transfer face, has reduced the volume of radiation heat transfer part, makes heat transfer effect better.
Synthetic gas and lime-ash, through behind radiation heat transfer chamber, mix with Quench gas, cooling rapidly.Lime-ash solidifies and falls into bottom slag bath 3.Air-flow reflexed upwards enters convective heat exchange part.
The bottom of slag bath 3 in flue gas Quench assembly 4.Lime-ash falls into slag bath 3, mixes sharply coolingly with water, forms the solid-state lime-ash of high rigidity, with water, enters in lock slag ladle.Slagging scorification situation depending on coal ash, can install dregs breaker additional, guarantees the reliable and stable operation of dreg removing system.
Convective heat exchange part is comprised of some groups of spiral pipes, and spiral pipe skin is membrane wall.Every group of spiral pipe by four layers closely around spiral endless tube form, every group of spiral pipe is staggered in arrangement.Synthetic gas after Quench flows through vaporizer 7, superheater, economizer and carries out heat exchange cooling successively, from syngas outlet, discharges.
Claims (10)
1. with the hybrid heat reclamation device of integrated pencil radiation preheating of flue gas Quench, it is characterized in that: comprise pressure housing, synthetic gas entrance, radiation heat transfer assembly, flue gas Quench assembly, convective heat exchange assembly, slag bath, syngas outlet, synthetic gas entrance is positioned at the top of pressure housing, and syngas outlet is positioned at the upper end of pressure housing sidewall; Radiation heat transfer assembly is fixed at the top in pressure housing, with the abundant heat exchange of gas with heat; Flue gas Quench assembly, convective heat exchange assembly are all fixedly installed on the bottom in pressure housing, and convective heat exchange assembly is between flue gas Quench assembly and pressure housing; Slag bath is arranged at the bottom in pressure housing, and the bottom of slag bath and the bottom of pressure housing form slag-drip opening jointly; Radiation heat transfer assembly, flue gas Quench assembly, convective heat exchange assembly, slag bath are positioned at pressure housing and form one.
2. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 1, is characterized in that: described synthetic gas entrance is a long narrow passage, and the inwall of this synthetic gas entrance is refractory liner.
3. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 1, is characterized in that: described radiation heat transfer assembly is longitudinally located in pressure housing, with the abundant heat exchange of gas with heat, radiation heat transfer assembly comprises radiation water wall and radiation screen, radiation water wall is the cylindrical wall that the standpipe that arranged by several parallel longitudinals surrounds, two adjacent standpipes are by being welded to connect, the centre of cylindrical wall is radiation heat transfer chamber, cylindrical wall extends downward slag bath upper end, and radiation screen is positioned at cylindrical wall upper end, radiation heat transfer assembly also comprises radiation water wall upper collecting chamber, radiation water wall lower header, radiation water wall water inlet pipe, radiation water wall fairlead and radiation water wall surface, radiation water wall upper collecting chamber is communicated with the upper end of each standpipe, radiation water wall lower header is communicated with the lower end of each standpipe, one end of radiation water wall water inlet pipe and pressure housing are affixed and be located at the outside of pressure housing, the other end of radiation water wall water inlet pipe is communicated with radiation water wall upper collecting chamber, one end of radiation water wall fairlead and the upper cover of pressure housing are affixed, the other end is communicated with radiation water wall upper collecting chamber.
4. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 3, it is characterized in that: described radiation screen is formed by several standpipes row, standpipe row outwards disperse and be distributed in radiation heat transfer chamber with the center of heat reclamation device, each standpipe row is formed by some standpipes, and adjacent two standpipes of standpipe row are close to setting; Radiation heat transfer assembly also comprises radiation screen upper collecting chamber, radiation screen lower header, radiation screen water inlet pipe, radiation screen fairlead, the lower end of radiation screen heating surface is communicated with radiation screen lower header, the upper end of radiation screen heating surface is communicated with radiation screen upper collecting chamber, radiation screen water inlet pipe and radiation screen fairlead are communicated with radiation screen lower header and radiation screen upper collecting chamber respectively, and are drawn out to outside pressure housing.
5. according to the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench described in claim 3 or 4, it is characterized in that: described flue gas Quench assembly comprises Quench gas entrance and gas mixing chamber, gas mixing chamber enters interruption-forming by radiation water wall and the Quench gas below radiation screen; Described Quench gas entrance is uniformly distributed on radiation water wall, and extends to outside pressure housing.
6. according to the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench described in claim 1 or 4, it is characterized in that: described convective heat exchange assembly comprises vaporizer, superheater and economizer, and vaporizer, superheater and economizer are arranged between gas mixing chamber and pressure housing from the bottom up successively.
7. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 6, it is characterized in that: described vaporizer, superheater and economizer are formed by one group of spiral pipe respectively, every group of spiral pipe comprises respectively four helical layer endless tubes, between every two-layer spiral endless tube, have certain distance, every helical layer endless tube by pipe closely around forming.
8. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 7, it is characterized in that: described vaporizer also comprises vaporizer upper collecting chamber, vaporizer lower header, vaporizer water inlet pipe, vaporizer fairlead, the upper end that forms the spiral pipe of vaporizer is communicated with vaporizer upper collecting chamber, the lower end that forms the spiral pipe of vaporizer is communicated with vaporizer lower header, vaporizer water inlet pipe is communicated with vaporizer lower header, and vaporizer fairlead is communicated with vaporizer upper collecting chamber; Described superheater also comprises superheater upper collecting chamber, superheater lower header, superheater water inlet pipe, superheater fairlead, the upper end that forms the spiral pipe of superheater is communicated with superheater upper collecting chamber, the lower end that forms the spiral pipe of superheater is communicated with superheater lower header, superheater water inlet pipe is communicated with superheater lower header, and superheater fairlead is communicated with superheater upper collecting chamber; Described economizer also comprises economizer upper collecting chamber, economizer lower header, economizer water inlet pipe, economizer fairlead, the upper end that forms the spiral pipe of superheater is communicated with economizer upper collecting chamber, the lower end that forms the spiral pipe of economizer is communicated with economizer lower header, economizer water inlet pipe is communicated with economizer lower header, and economizer fairlead is communicated with economizer upper collecting chamber; Vaporizer water inlet pipe, vaporizer fairlead, superheater water inlet pipe, superheater fairlead, economizer water inlet pipe, economizer fairlead all extend to outside pressure housing.
9. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 1, is characterized in that: the upper end of described slag bath is connected with convective heat exchange water wall lower end.
10. the hybrid heat reclamation device of integrated pencil radiation preheating with flue gas Quench according to claim 8, is characterized in that specific works principle is:
When synthetic gas and the melting slag of high temperature goes out after vapourizing furnace, the long narrow synthetic gas entrance by this device top enters radiation heat transfer assembly, in radiation heat transfer chamber, high-temperature synthesis gas stream and melting slag is carried out to radiation water-cooled cooling;
Then, synthetic gas and melting slag enter gas mixing chamber through behind radiation heat transfer chamber, mix with the Quench gas passing into, further cooling rapidly in gas mixing chamber;
Cooled melting slag directly enters slag bath, and in slag bath, melting slag mixes sharply cooling with water, forms the solid-state lime-ash of high rigidity, and solid-state lime-ash is discharged with water;
Synthetic gas is after gas mixing chamber is cooling, and the reflexed of the process slag bath water surface upwards carries out mist cooling by desuperheater assembly; In entering convective heat exchange assembly, flow through successively vaporizer, superheater, economizer and carry out heat exchange cooling, by syngas outlet, discharged.
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| CN104263415A (en) * | 2014-09-28 | 2015-01-07 | 中国东方电气集团有限公司 | Dry pulverized coal gasification device |
| CN104263414A (en) * | 2014-09-28 | 2015-01-07 | 中国东方电气集团有限公司 | Integrated coal gasification waste heat recovery device |
| CN107033965A (en) * | 2016-02-04 | 2017-08-11 | 清华大学煤燃烧工程研究中心 | Gasification furnace with heat recovery system |
| CN111912260A (en) * | 2020-06-24 | 2020-11-10 | 哈尔滨汽轮机厂辅机工程有限公司 | Heat exchange equipment integrating preheating, evaporation and overheating |
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Effective date of registration: 20180425 Address after: 610000 18 West core road, hi-tech West District, Chengdu, Sichuan Patentee after: Dongfang Electric Co., Ltd. Address before: 610036 Shu Han Road, Jinniu District, Chengdu, Sichuan Province, No. 333 Patentee before: Dongfang Electric Corporation |
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