CN103013580A - Integrated bunch type radiant boiler and preheating boiler mixed heat recovery device - Google Patents
Integrated bunch type radiant boiler and preheating boiler mixed heat recovery device Download PDFInfo
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- CN103013580A CN103013580A CN2012105303355A CN201210530335A CN103013580A CN 103013580 A CN103013580 A CN 103013580A CN 2012105303355 A CN2012105303355 A CN 2012105303355A CN 201210530335 A CN201210530335 A CN 201210530335A CN 103013580 A CN103013580 A CN 103013580A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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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
- Y02P20/10—Process efficiency
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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
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention relates to an integrated bunch type radiant boiler and preheating boiler mixed heat recovery device, which comprises a pressure shell, a synthesis gas inlet, a radiation heat exchange component, a desuperheater component, a slag basin, a heat convection component, and a synthesis gas outlet, wherein the synthesis gas inlet is formed in the top of the pressure shell; the synthesis gas outlet is formed in the upper end of the side wall of the pressure shell; the radiation heat exchange component is longitudinally fixed in the middle of the pressure shell; the heat convection component is arranged between the radiant heat exchange component and the pressure shell; the desuperheater component is fixedly arranged below the heat convection component; and the slag basin is positioned at the lower part inside the pressure shell. The heat recovery device can effectively absorb sensible head in the coarse synthesis gas to generate high-pressure steam or intermediate-pressure steam for power generation or preheating other working media, so as to greatly improve the whole source utilization ratio, and achieve high energy recovery utilization ratio. The whole size of the exhaust boiler can be effectively reduced; manufacturing, transportation and installation are convenient; and the dust deposition problem at the heat convection surface can be eliminated.
Description
Technical field
The present invention relates to the hot vapourizing furnace of Coal Gasification Technology, particularly the hybrid heat reclamation device of a kind of integrated pencil radiant boiler preboiler.
Background technology
Integrated gasification combined cycle for power generation system (IGCC) can realize that coal-firing efficient, cleaning and variation utilize, and also is future development coal-based power generation CO
2Zero release---i.e. one of the core technology of " green coal electricity " coal.In the IGCC power generation system, waste heat boiler is the substantial equipment in the sensible heat key equipment of recycling and the island of gasifying, waste heat boiler will make heating gas efficient 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 dual mode: the one, and the powdered coal pressuring gasified technology of the air flow bed take Shell company as representative, circulation cold air returns the outlet of vapourizing furnace high-temperature synthesis gas the vapourizing furnace synthetic gas is cooled to 700～750 ℃, and then enters convection current exhaust-heat boiler heat exchange by-product middle pressure steam.Another kind is the coal water slurry gasification technique take GE company as representative, and high-temperature synthesis gas sensible heat adopts the mode of radiant boiler+counter current boiler to reclaim the by-product high-pressure saturated steam.But also there are the problems such as complex structure, work-ing life is short in waste heat boiler of the prior art, is mainly manifested in:
(1) the Shell bed pulverized coal gasification technology adopts 1.3～1.5 times circulation cold air chilling high-temperature synthesis gas, increased the size of convection current exhaust-heat boiler and follow-up synthetic gas dust removal installation thereof, increased simultaneously the investment of equipment, the synthetic gas recycle compressor has increased the energy consumption of gasification installation; Owing to the counter current boiler dust stratification, affected the heat transfer effect of counter current boiler, need to add than the more Quench gas of design Quench tolerance.
(2) the full cement sensible heat recovery system of synthetic gas in the GE coal water slurry gasification technique is comprised of radiation waste heat boiler and two equipment of convection current exhaust-heat boiler, two equipment are independently arranged, cause facility investment large, it is large to take up room, and system's reliability of operation is also owing to the complexity of equipment is affected; Radiant boiler synthetic gas temperature shortage regulating measure causes the counter current boiler dust stratification to stop up simultaneously.
Summary of the invention
The present invention is defective and the deficiency that overcomes existing vapourizing furnace waste heat boiler, provide a kind of integrated pencil radiant boiler preboiler hybrid heat reclamation device, be combined as a whole with radiant boiler, counter current boiler vapourizing furnace, can reach abundant recovery high-temperature synthesis gas and sensible heat that slag is with, reduce investment and save energy, improve the purpose 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 radiant boiler preboiler, it is characterized in that: comprise pressure housing, synthetic gas entrance, radiation heat transfer assembly, desuperheater assembly, convective heat exchange assembly, slag bath, syngas outlet, the synthetic gas entrance is positioned at the top of pressure housing, and the upper end of pressure housing sidewall is provided with syngas outlet; The radiation heat transfer assembly vertically is fixed at the centre in the pressure housing, and with the abundant heat exchange of the gas of heat; The convective heat exchange assembly is located between radiation heat transfer assembly and the pressure housing; The desuperheater assembly is fixedly installed on the below of convective heat exchange assembly; Slag bath is arranged at the bottom in the pressure housing, and the bottom of slag bath and the bottom of pressure housing form slag-drip opening jointly.
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 the radiation water wall is the cylindrical wall that the standpipe by several parallel longitudinal settings surrounds, and two adjacent standpipes are by being welded to connect, and the centre of cylindrical wall is the radiation heat transfer chamber; The 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, and an 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.
Described radiation screen is formed by several standpipes row, and all standpipe rows outwards disperse with the center of heat reclamation device and are distributed in the radiation heat transfer chamber, and each standpipe row is formed by some standpipes, and adjacent two standpipes of standpipe row are close to setting; The 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 the radiation screen lower header, the upper end of radiation screen heating surface is communicated with the 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 the pressure housing.
Described convective heat exchange assembly comprises convective heat exchange water wall, vaporizer, superheater and economizer, vaporizer, superheater and economizer distribute from top to bottom successively, the cylindrical wall that the convective heat exchange water wall is surrounded by the standpipe of several parallel longitudinal settings, 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 the convective heat exchange water wall, 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 the 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 certain distance are arranged, 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 the vaporizer upper collecting chamber, the lower end that forms the spiral pipe of vaporizer is communicated with the vaporizer lower header, the vaporizer water inlet pipe is communicated with the vaporizer lower header, and the vaporizer fairlead is communicated with the 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 the superheater upper collecting chamber, the lower end that forms the spiral pipe of superheater is communicated with the superheater lower header, the superheater water inlet pipe is communicated with the superheater lower header, and the superheater fairlead is communicated with the 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 the economizer upper collecting chamber; The lower end that forms the spiral pipe of economizer is communicated with the economizer lower header, and the economizer water inlet pipe is communicated with the economizer lower header, and the economizer fairlead is communicated with the 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 the pressure housing.
Described desuperheater assembly comprises desuperheating water water inlet pipe, desuperheating water header and a plurality of atomizing nozzle, and atomizing nozzle distributes by even circumferential as the center of circle take the center of heat reclamation device, and shower nozzle is arranged downwards; Atomizing nozzle is communicated with the desuperheating water header, and the desuperheating water water inlet manifold is communicated with the desuperheating water header.
Described slag bath is in the lower end of desuperheater assembly, and the upper end of slag bath is connected with convective heat exchange water wall lower end.
The principle of work of heat reclamation device is:
After the synthetic gas of high temperature and melting slag went out vapourizing furnace, the long narrow synthetic gas entrance by this device top entered the radiation heat transfer assembly, in the radiation heat transfer chamber, high-temperature synthesis gas stream and melting slag is carried out the radiation water-cooled cooling.The synthetic gas of high temperature and melting slag enter in the radiation heat transfer chamber, mode with radiative transfer is passed to radiation heat transfer assembly all around with heat, because circulation area enlarges, melting slag under airflow function to around splash, from leaving the synthetic gas entrance to the process that arrives the radiation water wall, sufficiently cooled, solidify and lose agglutinating value(of coal), fall under gravity in the slag bath of radiation heat transfer assembly bottom, in slag bath, mix sharply cooling with water, form the solid-state lime-ash of high rigidity, lime-ash can enter in the lock slag ladle with water.Blow device is set near slag bath, carries out the disturbance of Anti-slagging precipitation, guarantee the reliable and stable operation of dreg removing system; From the synthetic gas that the radiation heat transfer assembly gets off, carry the flying dust that part is not condensed secretly, condense in the place at the desuperheater assembly, the existence of desuperheater assembly has reduced the slagging scorification of convective heat exchange parts, and can control the synthetic gas temperature that enters the convective heat exchange face, guarantees the operation of its normal safety; After condensing, synthetic gas enters the convective heat exchange assembly and flows through successively vaporizer, superheater, economizer and carry out the heat exchange cooling with the water of the inside.
After high-temperature synthesis gas stream enters heat reclamation device from the synthetic gas entrance, by behind the radiation heat transfer chamber, change direction downwards, reflexed upwards by desuperheater assembly and convective heat exchange assembly, carries out cooling down, and reclaims a large amount of sensible heats; This heat reclamation device has saved the connection portion between radiant boiler and the preboiler, and recovery sensible heat that high-temperature synthesis gas is with as much as possible.
The radiation heat transfer screen of radiation heat transfer assembly is in the middle and lower part in radiation heat transfer chamber, and its existence has increased the radiation heat transfer face, has reduced the volume of radiation heat transfer assembly, makes heat transfer effect better.
Beneficial effect of the present invention is as follows:
(1) the present invention can be used for the IGCC power generation system, and the sensible heat generation high pressure steam or the middle pressure steam that absorb crude synthesis gas are used for generating, and whole energy utilization rate improves greatly, has the high advantage of energy recovery utilization ratio;
(2) the present invention adopts the design of Double water-cooled wall construction and radiation heat transfer screen and convective heat exchange face is set, and has effectively reduced the waste heat boiler overall dimensions, and it is comparatively convenient to make, transport and install;
(3) the present invention is with regulating measure, arrange the atomizing spray Desuperheating device in convective heat exchange assembly bottom, injection flow rate can be controlled according to the flue-gas temperature that enters convective heat exchange face assembly, makes the homo(io)thermism of the coal gas of high temperature that enters the convective heat exchange face, thereby eliminates the dust stratification problem of convective heat exchange face.
Description of drawings
Fig. 1 is cross-sectional schematic of the present invention;
Fig. 2 is the A-A cross section cross-sectional schematic among Fig. 1 of the present invention;
Fig. 3 is the B-B cross section cross-sectional schematic among Fig. 1 of the present invention;
Fig. 4 is the partial schematic diagram of the I section among Fig. 1 of the present invention.
Wherein, Reference numeral is: 1 synthetic gas entrance, 2 radiation heat transfer assemblies, 3 slag baths, 3-1 slag-drip opening, 4 desuperheater assemblies, 4-1 desuperheating water water inlet pipe, 4-2 desuperheating water header, 4-3 atomizing nozzle, 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, hot device upper collecting chamber 8-1,8-2 superheater lower header, 8-3 superheater water inlet pipe, 8-4 superheater fairlead, 9 economizers, 9-1 economizer upper collecting chamber, 9-2 economizer lower header, 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, 10-5 convective heat exchange water wall surface, 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, radiation water wall water inlet pipe 12-4,12-5 radiation water wall surface, 12-6 standpipe, 13 syngas outlet, 14 every groups of spiral pipes, 15 spiral endless tubes.
Embodiment
Shown in Fig. 1-4, the hybrid heat reclamation device of integrated pencil radiant boiler preboiler comprises synthetic gas entrance 1, radiation heat transfer assembly 2, slag bath 3, desuperheater assembly 4, convective heat exchange assembly 5, pressure housing 6.
It is characterized in that, described heat reclamation device is the hybrid heat reclamation device of a kind of pencil, the upper end of pressure housing 6 sidewalls is provided with syngas outlet 13, be provided with the synthetic gas access road on the upper cover of pressure housing 6, the synthetic gas entrance 1 of described heat reclamation device is a long narrow passage, and inwall is refractory liner 1-1.
Described radiation heat transfer assembly comprises radiation water wall 12 and radiation screen 11, and radiation water wall 12 is comprised of 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 and radiation water wall surface 12-5.A plurality of standpipe 12-6 be arranged in parallel, and the columniform cavity of encircling a city forms membrane type radiation water wall 12, between two adjacent standpipe 12-6 by being welded to connect.The upper end of each standpipe 12-6 is communicated with radiation water wall upper collecting chamber 12-1, and the lower end of each standpipe 12-6 is communicated with radiation water wall lower header 12-2.The end of radiation water wall water inlet pipe 12-4 and pressure housing 6 outside, the other end affixed and that be located at pressure housing 6 are communicated with radiation water wall upper collecting chamber 12-1, and the end of radiation water wall fairlead 12-3 is affixed with the upper cover of pressure housing 6, the other end is communicated with radiation water wall upper collecting chamber 12-1.
Described radiation screen 11 is comprised of 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 and radiation screen heating surface 11-5.The lower end of radiation screen heating surface 11-5 is communicated with radiation screen lower header 11-2, and 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 the pressure housing 6.
Described convective heat exchange assembly 5 comprises that convective heat exchange water wall 10, vaporizer 7, superheater 8 and economizer 9 form.Convective heat exchange water wall 10 is comprised of 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 and convective heat exchange water wall surface 10-5.Convective heat exchange water wall surface 10-5 is made of a plurality of standpipe 10-6, and a plurality of standpipe 10-6 columniform cavity of encircling a city forms the radiation heat transfer assembly.
Described vaporizer 7, superheater 8 and economizer 9 are comprised of three groups of spiral pipes 14, and spiral pipe 14 skins are convective heat exchange water wall 10, and spiral pipe 14 internal layers are radiation water wall 12.Every group of spiral pipe 14 by four layers closely around spiral endless tube 15 form, every group of spiral pipe 14 is staggered in arrangement.Vaporizer 7, superheater 8 and economizer 9 are arranged in the annular space between radiation water wall 12 and the convective heat exchange water wall 10 successively.Described vaporizer spiral pipe 7-5 upper end, lower end are communicated with vaporizer upper collecting chamber 7-1, lower header 7-2 respectively, and 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 spiral pipe 8-5 upper end, lower end are communicated with superheater upper collecting chamber 8-1, lower header 8-2 respectively, and 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 spiral pipe 9-5 upper end, lower end are communicated with economizer upper collecting chamber 9-1, lower header 9-2 respectively, 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.
Described desuperheater assembly 4 is comprised of desuperheating water water inlet pipe 4-1, desuperheating water header 4-2 and a plurality of atomizing nozzle 4-3, and atomizing nozzle 4-3 distributes according to even circumferential, and shower nozzle is arranged downwards.Described atomizing nozzle 4-3 is communicated with desuperheating water header 4-2, and desuperheating water water inlet manifold 4-1 is communicated with desuperheating water header 4-2.
Described slag bath 3 is in the bottom of desuperheater assembly 4, and slag bath 4 upper ends are connected with convective heat exchange water wall 10 lower ends, and the lower end of slag bath 4 lower ends and pressure housing 6 is connected to form slag-drip opening 3-1.
The working process of the hybrid heat reclamation device of the present invention's integrated pencil radiant boiler preboiler is:
Described heat reclamation device is the hybrid heat reclamation device of a kind of pencil, the radiation heat transfer assembly is at internal layer, the convective heat exchange assembly is at skin, after high-temperature synthesis gas stream enters heat reclamation device from the synthetic gas entrance, by behind the radiation heat transfer chamber, change direction downwards, reflexed is upwards by desuperheater assembly and convective heat exchange assembly, carry out cooling down, and reclaim a large amount of sensible heats.This heat reclamation device has saved the connection portion between radiant boiler and the preboiler, and recovery sensible heat that high-temperature synthesis gas is with as much as possible.
The synthetic gas entrance of heat reclamation device is a long narrow passage, and inwall is refractory liner.After high-temperature synthesis gas and melting slag (about 1400 ℃ of temperature) go out vapourizing furnace, by long narrow passage, enter the radiation heat transfer assembly with higher gas velocity.
The radiation heat transfer assembly is comprised of the screen of the radiation heat transfer in radiation heat transfer chamber and the chamber.High-temperature synthesis gas and melting slag enter in the water wall chamber, the radiation heat transfer assembly around in the mode of radiative transfer heat being passed to.Because circulation area enlarges, to splash all around, to the process that arrives the radiation heat transfer assembly, sufficiently cooled from leaving channel, curing loses agglutinating value(of coal) to melting slag, falls under gravity in the slag bath of radiation heat transfer assembly bottom under airflow function.The radiation heat transfer screen is in the middle and lower part in radiation heat transfer chamber, and its existence has increased the radiation heat transfer face, has reduced the volume of radiation heat transfer assembly, makes heat transfer effect better.
Slag bath is in the bottom of radiation heat transfer assembly.After lime-ash after the curing passes the radiation heat transfer chamber, fall into the slag bath of bottom, in slag bath, mix sharply cooling with water, form the solid-state lime-ash of high rigidity.Lime-ash enters in the lock slag ladle with water.Blow device is set near slag bath, carries out the disturbance of Anti-slagging precipitation, guarantee the reliable and stable operation of dreg removing system.
The desuperheater assembly is in the bottom of convective heat exchange parts, carries the flying dust that part is not condensed from radiation heat transfer assembly synthetic gas out secretly, and condense in the place at the desuperheater assembly.The existence of desuperheater assembly has reduced the slagging scorification of convective heat exchange parts, and can control the synthetic gas temperature that enters the convective heat exchange face, guarantees the operation of its normal safety.
The convective heat exchange parts is comprised of some groups of spiral pipes, and the spiral pipe skin is the radiation heat transfer assembly.Every group of spiral pipe by four layers closely around the spiral endless tube form, every group of spiral pipe is staggered in arrangement.Flow through successively vaporizer, superheater, economizer and carry out the heat exchange cooling with the water of the inside through the synthetic gas of draining cooling.
Claims (11)
1. the hybrid heat reclamation device of integrated pencil radiant boiler preboiler, it is characterized in that: comprise pressure housing, synthetic gas entrance, radiation heat transfer assembly, desuperheater assembly, convective heat exchange assembly, slag bath, syngas outlet, the synthetic gas entrance is positioned at the top of pressure housing, and the upper end of pressure housing sidewall is provided with syngas outlet; The radiation heat transfer assembly vertically is fixed at the centre in the pressure housing, and with the abundant heat exchange of the gas of heat; The convective heat exchange assembly is located between radiation heat transfer assembly and the pressure housing; The desuperheater assembly is fixedly installed on the below of convective heat exchange assembly; Slag bath is arranged at the bottom in the pressure housing, and the bottom of slag bath and the bottom of pressure housing form slag-drip opening jointly.
2. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler according to claim 1, it 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 revolution shape radiant boiler preboiler according to claim 1, it is characterized in that: described radiation heat transfer assembly comprises radiation water wall and radiation screen, the radiation water wall is the cylindrical wall that the standpipe by several parallel longitudinal settings surrounds, two adjacent standpipes are by being welded to connect, and the centre of cylindrical wall is the radiation heat transfer chamber; The 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, and an 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 revolution shape radiant boiler preboiler according to claim 3, it is characterized in that: described radiation screen is formed by several standpipes row, all standpipe rows outwards disperse with the center of heat reclamation device and are distributed in the radiation heat transfer chamber, each standpipe row is formed by some standpipes, and adjacent two standpipes of standpipe row are close to setting; The 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 the radiation screen lower header, the upper end of radiation screen heating surface is communicated with the 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 the pressure housing.
5. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler according to claim 1, it is characterized in that: described convective heat exchange assembly comprises convective heat exchange water wall, vaporizer, superheater and economizer, vaporizer, superheater and economizer distribute from top to bottom successively, the cylindrical wall that the convective heat exchange water wall is surrounded by the standpipe of several parallel longitudinal settings, two adjacent standpipes are by being welded to connect, and vaporizer, superheater and economizer are positioned at the centre of cylindrical wall.
6. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler according to claim 5, it is characterized in that: 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 the convective heat exchange water wall, 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 the pressure housing.
7. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler 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 certain distance is arranged, every helical layer endless tube by pipe closely around forming.
8. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler 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 the vaporizer upper collecting chamber, the lower end that forms the spiral pipe of vaporizer is communicated with the vaporizer lower header, the vaporizer water inlet pipe is communicated with the vaporizer lower header, and the vaporizer fairlead is communicated with the 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 the superheater upper collecting chamber, the lower end that forms the spiral pipe of superheater is communicated with the superheater lower header, the superheater water inlet pipe is communicated with the superheater lower header, and the superheater fairlead is communicated with the 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 the economizer upper collecting chamber; The lower end that forms the spiral pipe of economizer is communicated with the economizer lower header, and the economizer water inlet pipe is communicated with the economizer lower header, and the economizer fairlead is communicated with the 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 the pressure housing.
9. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler according to claim 1, it is characterized in that: described desuperheater assembly comprises desuperheating water water inlet pipe, desuperheating water header and a plurality of atomizing nozzle, atomizing nozzle distributes by even circumferential as the center of circle take the center of heat reclamation device, and shower nozzle is arranged downwards; Atomizing nozzle is communicated with the desuperheating water header, and the desuperheating water water inlet manifold is communicated with the desuperheating water header.
10. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler according to claim 1, it is characterized in that: described slag bath is in the lower end of desuperheater assembly, and the upper end of slag bath is connected with convective heat exchange water wall lower end.
11. the hybrid heat reclamation device of integrated revolution shape radiant boiler preboiler according to claim 8, it is characterized in that the specific works principle is: after the synthetic gas of high temperature and melting slag go out vapourizing furnace, long narrow synthetic gas entrance by this device top enters the radiation heat transfer assembly, in the radiation heat transfer chamber, high-temperature synthesis gas stream and melting slag are carried out the radiation water-cooled cooling; The synthetic gas of high temperature and melting slag enter in the radiation heat transfer chamber, mode with radiative transfer is passed to radiation heat transfer assembly all around with heat, because circulation area enlarges, melting slag under airflow function to around splash, from leaving the synthetic gas entrance to the process that arrives the radiation water wall, sufficiently cooled, solidify and lose agglutinating value(of coal), fall under gravity in the slag bath of radiation heat transfer assembly bottom, in slag bath, mix sharply cooling with water, form the solid-state lime-ash of high rigidity; Carry the flying dust that part is not condensed from the synthetic gas that the radiation heat transfer assembly gets off secretly, condense in the place at the desuperheater assembly; After condensing, synthetic gas enters the convective heat exchange assembly and flows through successively vaporizer, superheater, economizer and carry out the heat exchange cooling with the water of the inside.
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| CN2012105303355A CN103013580A (en) | 2012-12-11 | 2012-12-11 | Integrated bunch type radiant boiler and preheating boiler mixed heat recovery device |
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| CN2012105303355A CN103013580A (en) | 2012-12-11 | 2012-12-11 | Integrated bunch type radiant boiler and preheating boiler mixed heat recovery device |
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| CN114060794A (en) * | 2021-11-27 | 2022-02-18 | 无锡华光环保能源集团股份有限公司 | Evaporator structure of waste incineration boiler |
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Application publication date: 20130403 |