CN113217939B - Tower type solar system for improving air inlet temperature and fuel heat value of garbage power station - Google Patents
Tower type solar system for improving air inlet temperature and fuel heat value of garbage power station Download PDFInfo
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- CN113217939B CN113217939B CN202110466855.3A CN202110466855A CN113217939B CN 113217939 B CN113217939 B CN 113217939B CN 202110466855 A CN202110466855 A CN 202110466855A CN 113217939 B CN113217939 B CN 113217939B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/20—Arrangements for controlling solar heat collectors for tracking
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/47—Mountings or tracking
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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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
A tower type solar system and a method for improving the inlet air temperature and the fuel heat value of a garbage power station are characterized in that a tower type solar heat collection, heat storage and heat exchange system module is additionally arranged, a garbage pool and a primary air system and a secondary air system of the existing garbage power station are improved, the garbage pool is designed into a closed system, a garbage inlet first door and a garbage inlet second door of the garbage pool are arranged, the primary door and the garbage inlet second door are arranged at a hearth inlet feed hopper, and an air inlet is arranged at the bottom of the garbage pool, so that the purpose of improving the temperature of the primary air and the secondary air of the garbage power station by utilizing solar energy is achieved. In addition, the heated air is sent into the garbage pool, so that the temperature of the garbage pool and the heat value of the garbage can be improved. The invention can obviously reduce or eliminate the consumption of main steam and first-stage extraction steam for heating the air preheater, obviously improve the temperature of primary air and secondary air, obviously improve the generating power and efficiency of the unit, promote the fermentation process of garbage in the garbage pool by accurately controlling the air temperature at the inlet of the garbage pool, effectively improve the heat value of fuel garbage, thereby improving the heat efficiency of the waste heat boiler.
Description
Technical Field
The invention relates to the technical field of garbage power generation, in particular to a system and a method for improving the inlet air temperature and the fuel heat value of a garbage power station by tower-type solar energy.
Background
At present, the treatment modes of domestic garbage in China mainly include 3 types: (1) landfill of garbage; (2) biological treatment; and (3) carrying out incineration treatment. The waste incineration waste heat power generation treatment method is the most ideal treatment method at present, and has the advantages of small occupied area, large treatment capacity, easiness in pollutant control, high energy utilization rate and the like.
Among the garbage power station thermodynamic system of latest operation, exhaust-heat boiler air preheater all designs and adopts one section extraction steam of main steam and steam turbine to heat the primary air, and the overgrate air does not heat, is showing like this and has reduced garbage power station's generating capacity and generating efficiency, and to take a garbage power station of 25MW grade as an example, exhaust-heat boiler air preheater's steam consumption is about 12t/h, and this leads to unit generating power to reduce about 2.0MW, reduces about 8% relatively.
In the latest garbage power station thermodynamic system, the garbage pools are provided with air suction devices, and malodorous gases in the garbage pools are conveyed to the hearth to be used as combustion air, so that odor diffusion of the garbage power station is greatly reduced, and the garbage power station thermodynamic system is favorable for life and health of garbage power station personnel and surrounding residents. However, in winter of nearly two years, the phenomenon of icing of the garbage in the garbage pool in the garbage power station in some northern areas is caused, so that the heat value of the garbage is reduced, the combustion is difficult, the stable combustion of a boiler is influenced, and even the combustion-supporting garbage of diesel oil needs to be added in some time periods, so that the production cost is increased, the generating energy of a unit is reduced, and the garbage processing capacity of the power station is reduced.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a system and a method for improving the inlet air temperature and the fuel calorific value of a garbage power station by tower type solar energy.
In order to achieve the purpose, the invention adopts the technical scheme that:
a system for improving the inlet air temperature and the fuel heat value of a garbage power station by tower type solar energy comprises a garbage pool of the garbage power station, a primary air system, a secondary air system and a tower type solar heat collection, heat storage and heat exchange system connected with the primary air system and the secondary air system;
the tower type solar heat collection, heat storage and heat exchange system comprises a solar receiving tower 3, wherein the solar receiving tower 3 is connected with a solar receiving tower heat absorption heat exchanger 2, an outlet of the solar receiving tower heat absorption heat exchanger 2 is connected with a high-temperature molten salt tank 7 through a pipeline, an outlet of the high-temperature molten salt tank 7 is connected with an inlet of a high-temperature molten salt pump 8 through a pipeline, an outlet of the high-temperature molten salt pump 8 is connected with a molten salt/air heat exchanger 12 through a pipeline, a molten salt side low-temperature outlet of the molten salt/air heat exchanger 9 is connected with an inlet of a low-temperature molten salt tank 10 through a pipeline, an outlet of the low-temperature molten salt tank 10 is connected with an inlet of a low-temperature molten salt pump 11 through a pipeline, and an outlet of the low-temperature molten salt pump 11 is connected with an inlet of the solar receiving tower heat absorption heat exchanger 2 through a pipeline;
an air side inlet of the fused salt/air heat exchanger 12 is connected with the atmosphere, an air side outlet air pipe of the fused salt/air heat exchanger 12 is divided into two paths, one path is connected with an air inlet adjusting air door 6 of the garbage pool through an air inlet pipe 9 of the garbage pool, and an outlet of the air inlet adjusting air door 6 of the garbage pool is connected with an air inlet at the bottom of the garbage pool through an air pipe; the other path is connected with a garbage pool air inlet bypass pipe adjusting air door 4 through a garbage pool air inlet bypass pipe 5, and the outlet of the garbage pool air inlet bypass pipe adjusting air door 4 is connected with a first air inlet pipe and a second air inlet pipe through air pipes.
Heliostats are arranged on one side or the periphery of the solar receiving tower 3, the heliostats form a tower-type solar constant-ambient field 1, each heliostat is provided with an independent two-dimensional tracking mechanism used for automatically tracking the sun, and reflected light can be accurately projected into the solar receiving tower heat absorption heat exchanger 2.
The garbage pool is a closed system.
The garbage pool and the primary and secondary air systems of the garbage power station comprise an air preheater, an air preheater bypass air duct 20 is arranged on the air preheater in parallel, an inlet air door 18 is arranged at the air inlet end of the air preheater, and an outlet air door 19 is arranged at the air outlet end of the air preheater;
set up one door 13, two doors 14 at rubbish pond rubbish entrance department, set up fuel input one door 15, two doors 16 to boiler furnace fuel entry feeder hopper department in rubbish pond, rubbish bottom of the pool portion sets up air intlet 21, rubbish pond upper portion sets up one, overgrate air suction opening 22, the air temperature damper 23 is set up in the air blower import, the air temperature damper 24 is set up in the air intlet of overgrate air, rubbish pond air inlet pipeline sets up rubbish pond air inlet temperature damper 25.
An operation method of a tower type solar system for improving the inlet air temperature and the fuel heat value of a garbage power station comprises the following steps;
(1) Under the condition of illumination in the daytime, the low-temperature molten salt is conveyed to the solar receiving tower heat absorption heat exchanger 2 by the low-temperature molten salt pump 11, solar light rays are focused on the solar receiving tower heat absorption heat exchanger 2 by the tower type solar energy fixed-day environment field 1, the solar receiving tower heat absorption heat exchanger 2 heats the low-temperature molten salt, the high-temperature molten salt is stored in the high-temperature molten salt tank 7, the high-temperature molten salt is conveyed to the molten salt/air heat exchanger 12 by the high-temperature molten salt pump 8, the cooled high-temperature molten salt enters the low-temperature molten salt tank 10, and air passing through the molten salt/air heat exchanger 12 enters the garbage pool air inlet pipe 9 and the garbage pool air inlet bypass pipe 5 after being heated by the heater. Under the condition of no light at night, the low-temperature molten salt pump 11 stops working, and the heating process of the low-temperature molten salt stops;
(2) After air is added through a fused salt/air heat exchanger 12, one path of the air enters the garbage pool through a garbage pool air inlet pipe 9, a garbage pool air inlet adjusting air door 6 and a garbage pool air inlet 21, the temperature of garbage in the garbage pool is accurately controlled by adjusting the opening degree of the garbage pool air inlet adjusting air door 6, the opening degree of a garbage pool air inlet bypass pipe adjusting air door 4 and the opening degree of a garbage pool air inlet temperature adjusting air door 25, so that garbage fermentation is promoted, the garbage heat value is improved, and the air in the garbage pool enters a primary air inlet pipe and a secondary air inlet pipe through a primary air suction port and a secondary air suction port 22 at the upper part of the garbage pool; the other path enters a primary air inlet pipe and a secondary air inlet pipe through a garbage pool air inlet bypass pipe 5 and a garbage pool air inlet bypass pipe adjusting air door 4;
(3) In the normal operation process, the air preheater bypass air door 17 is always in an open state, the air preheater inlet air door 18 and the air preheater outlet air door 19 are in a closed state, the air preheater does not work, steam is not consumed to heat primary air, the primary air is boosted by the primary air fan, enters the air preheater bypass air duct 20 from the primary air inlet pipe and the secondary air inlet pipe, and enters the primary air distribution main pipe after passing through the air preheater bypass air door 17; when the fused salt/air heat exchanger 12 cannot work normally or the primary air temperature is low, an inlet air door 18 and an outlet air door 19 of the air preheater are partially or completely opened, an air preheater bypass air door 17 is closed or closed, the air preheater starts to work, and partial or all air is heated by the air preheater and then mixed with primary air of an air preheater bypass air pipe to enter a primary air distribution main pipe, so that the primary air temperature requirement of the boiler is met; the primary air temperature adjusting air door 23 is used for reducing the inlet air temperature of the primary air fan, and the air door can be opened when in an emergency state;
(4) In the normal operation process, secondary air is boosted by a secondary fan and enters a boiler hearth from a primary air inlet pipe and a secondary air inlet pipe to participate in boiler combustion; the secondary air temperature adjusting air door 24 is used for reducing the inlet air temperature of the secondary fan, and the air door can be opened in an emergency state;
(5) The process that the garbage truck dumps rubbish to the rubbish pond does: firstly, opening the first door 13 and simultaneously closing the second door 14, and dumping the garbage between the first door 13 and the second door 14; next, closing the first door 13, then opening the second door 14, and enabling the garbage to enter the garbage pool; finally, the two doors 14 are closed, and the garbage dumping process is finished;
(6) The process of garbage entering the boiler furnace is as follows: firstly, opening a door 15 at a feed hopper at a fuel inlet of a boiler hearth, and closing a second door 16 at the same time; then, the garbage grabbing hook grabs and then delivers the garbage into the feeding hopper, and the garbage is positioned between the first door 15 and the second door 16; finally, the first door 15 is closed, then the second door 16 is opened, and the garbage enters the boiler furnace and participates in combustion.
Under the condition of illumination in the daytime, the temperature of D point high-temperature molten salt at the outlet of the solar energy receiving tower heat absorption heat exchanger 2 reaches 560 ℃, the temperature of air at the outlet B point of the molten salt/air heat exchanger 12 reaches 500 ℃, the temperature at the D point of the inlet of the primary air fan reaches 470 ℃, the temperature at the F point of the primary air distribution main pipe reaches 465 ℃, the air temperature at the E point of the inlet of the secondary air fan reaches 473 ℃, and the air temperature at the C point of the inlet of the garbage pool meets the optimal temperature requirement of garbage fermentation of the garbage pool.
The invention has the beneficial effects that:
1. because the additionally arranged tower type solar energy system has the heat storage function, the system can be used for 24 hours, so that the consumption of main steam and first-stage extraction steam for heating the air preheater is reduced or eliminated, and the generating power and the generating efficiency of the unit are obviously improved;
2. by utilizing the system, the temperature of the garbage in the garbage pool can be accurately controlled, the fermentation process of the garbage in the garbage pool can be promoted by properly improving the air temperature of the garbage pool, the heat value of the fuel garbage is effectively improved, and the heat efficiency of the waste heat boiler is improved;
3. by adopting the invention, the temperature of the primary air and the secondary air of the garbage power station can be obviously improved, the temperature of the F point of the primary air fan main pipe can reach 470 ℃, and the temperature of the secondary air fan inlet air can reach 473 ℃, thereby obviously improving the overall efficiency of the system.
Drawings
FIG. 1 is a system for improving inlet air temperature and fuel heat value of a refuse power station by tower-type solar energy.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a tower type solar system for increasing the inlet air temperature and the fuel calorific value of a garbage power station needs to be improved and designed for a garbage pool and a primary air system and a secondary air system of an existing garbage power station; in addition, a module 1-tower type solar heat collection, heat storage and heat exchange system needs to be added.
Carry out the improved design to current garbage power station rubbish pond and one, overgrate air system and mainly include:
(1) The garbage pool is designed into a closed system and is not directly communicated with the atmospheric environment;
(2) Arranging a first door 13 and a second door 14 of a garbage inlet of the garbage pool;
(3) A first door 15 and a second door 16 for feeding fuel are arranged at a position from the garbage pool to a fuel inlet feed hopper of a boiler hearth;
(4) Adding an air preheater bypass duct 20;
(5) Adding an air preheater bypass damper 17;
(6) An inlet air door 18 and an outlet air door 19 of the air preheater are added;
(7) The bottom of the garbage pool is provided with an air inlet 21;
(8) The upper part of the garbage pool is provided with a primary air suction port and a secondary air suction port 22;
(9) A primary air temperature adjusting air door 23 is arranged at the inlet of the primary air fan;
(10) The inlet of the secondary fan is provided with a secondary air temperature adjusting air door 24; the air inlet pipeline of the garbage pool is provided with an air inlet temperature adjusting air door 25 of the garbage pool.
The added module 1-tower type solar heat collection, heat storage and heat exchange system comprises: the device comprises a tower type solar energy constant-temperature environmental field 1, a solar energy receiving tower heat absorption heat exchanger 2, a solar energy receiving tower 3, a high-temperature molten salt tank 7, a high-temperature molten salt pump 8, a low-temperature molten salt tank 10, a low-temperature molten salt pump 11, a molten salt/air heat exchanger 3, a garbage pool air inlet pipe 9, a garbage pool air inlet bypass pipe 5, a garbage pool air inlet adjusting air door 6, a garbage pool air inlet bypass pipe adjusting air door 4 and the like.
The added module 1-tower type solar heat collection, heat storage and heat exchange system has the following equipment connection modes:
a plurality of heliostats are arranged on one side or the periphery of the solar receiving tower 3, and each heliostat is provided with an independent two-dimensional tracking mechanism which can automatically track the sun so that the reflected light can be accurately projected into the heat absorber; the outlet of the solar energy receiving tower heat absorption heat exchanger 2 is connected with the high-temperature molten salt tank 7 through a pipeline, the outlet of the high-temperature molten salt tank 7 is connected with the inlet of the high-temperature molten salt pump 8 through a pipeline, the outlet of the high-temperature molten salt pump 8 is connected with the molten salt/air heat exchanger 12 through a pipeline, the low-temperature outlet of the molten salt/air heat exchanger 9 on the molten salt side is connected with the inlet of the low-temperature molten salt tank 10 through a pipeline, the outlet of the low-temperature molten salt tank 10 is connected with the inlet of the low-temperature molten salt pump 11 through a pipeline, and the outlet of the low-temperature molten salt pump 11 is connected with the inlet of the solar energy receiving tower heat absorption heat exchanger 2 through a pipeline.
An air side inlet of the fused salt/air heat exchanger 12 is connected with the atmosphere, an air side outlet air pipe of the fused salt/air heat exchanger 12 is divided into two paths, one path is connected with an air inlet adjusting air door 6 of the garbage pool through an air inlet pipe 9 of the garbage pool, and an outlet of the air inlet adjusting air door 6 of the garbage pool is connected with an air inlet at the bottom of the garbage pool through an air pipe; the other path is connected with a garbage pool air inlet bypass pipe adjusting air door 4 through a garbage pool air inlet bypass pipe 5, and the outlet of the garbage pool air inlet bypass pipe adjusting air door 4 is connected with a first air inlet pipe and a second air inlet pipe through air pipes.
The added module 1-tower type solar heat collection, heat storage and heat exchange system and the whole system working process after the garbage pool, the primary air system and the secondary air system of the existing garbage power station are improved and designed are as follows:
(1) Under the condition of illumination in the daytime, the low-temperature molten salt is conveyed to the solar energy receiving tower heat absorption heat exchanger 2 by the low-temperature molten salt pump 11, solar light rays are focused on the solar energy receiving tower heat absorption heat exchanger 2 by the tower type solar energy fixed-day environment field 1, the solar energy receiving tower heat absorption heat exchanger 2 heats the low-temperature molten salt, the high-temperature molten salt is stored in the high-temperature molten salt tank 7, the high-temperature molten salt is conveyed to the molten salt/air heat exchanger 12 by the high-temperature molten salt pump 8, the cooled high-temperature molten salt enters the low-temperature molten salt tank 10, and air passing through the molten salt/air heat exchanger 12 enters the garbage pool air inlet pipe 9 and the garbage Chi Jinfeng bypass pipe 5 after being heated by the heater. And under the condition of no illumination at night, the low-temperature molten salt pump 11 stops working, and the heating process of the low-temperature molten salt stops.
(2) After air is added through a fused salt/air heat exchanger 12, one path of the air enters the garbage pool through a garbage pool air inlet pipe 9, a garbage pool air inlet adjusting air door 6 and a garbage pool air inlet 21, the temperature of garbage in the garbage pool can be accurately controlled by adjusting the opening degree of the garbage pool air inlet adjusting air door 6, the opening degree of a garbage pool air inlet bypass pipe adjusting air door 4 and the opening degree of a garbage pool air inlet temperature adjusting air door 25, so that garbage fermentation is promoted, the garbage heat value is improved, and the air in the garbage pool enters a primary air inlet pipe and a secondary air inlet pipe through a primary air suction port and a secondary air suction port 22 on the upper portion of the garbage pool; the other path enters the primary air inlet pipe and the secondary air inlet pipe through the garbage pool air inlet bypass pipe 5 and the garbage pool air inlet bypass pipe air door 4.
(3) In the normal operation process, the air preheater bypass air door 17 is always in an open state, the air preheater inlet air door 18 and the air preheater outlet air door 19 are in a closed state, the air preheater does not work, steam is not consumed to heat primary air, the primary air is boosted by the primary air fan, enters the air preheater bypass air duct 20 from the primary air inlet pipe and the secondary air inlet pipe, and enters the primary air distribution main pipe after passing through the air preheater bypass air door 17; when the fused salt/air heat exchanger 12 cannot work normally or the primary air temperature is low, an inlet air door 18 and an outlet air door 19 of the air preheater are partially or completely opened, an air preheater bypass air door 17 is closed or closed, the air preheater starts to work, and partial or all air is heated by the air preheater and then mixed with primary air of an air preheater bypass air pipe to enter a primary air distribution main pipe, so that the primary air temperature requirement of the boiler is met; the primary air temperature adjusting air door 23 is used for reducing the inlet air temperature of the primary air fan, and can be opened in an emergency state.
(4) In the normal operation process, secondary air is boosted by a secondary fan and enters a boiler hearth from a primary air inlet pipe and a secondary air inlet pipe to participate in boiler combustion; the secondary air temperature adjusting air door 24 is used for reducing the inlet air temperature of the secondary air fan, and the air door can be opened in an emergency state.
(5) The process that the garbage truck dumps rubbish to the rubbish pond does: firstly, opening the first door 13 and simultaneously closing the second door 14, and dumping the garbage between the first door 13 and the second door 14; next, closing the first door 13, then opening the second door 14, and enabling the garbage to enter the garbage pool; finally, the two doors 14 are closed and the refuse dumping process is completed.
(6) The process of garbage entering the boiler furnace is as follows: firstly, opening a door 15 at a fuel inlet feed hopper of a boiler hearth, and closing two doors 16 at the same time; then, the garbage grabbing hook grabs the garbage and then delivers the garbage into the feeding hopper, and the garbage is positioned between the first door 15 and the second door 16; finally, one door 15 is closed, and then two doors 16 are opened, so that the garbage enters the hearth of the boiler and participates in combustion.
As shown in figure 1, under the condition of illumination in the daytime, the temperature of D point of the outlet of a heat absorption heat exchanger 2 of the solar energy receiving tower is 560 ℃, the temperature of air at B point of the outlet of a molten salt/air heat exchanger 12 is 500 ℃, the temperature at D point of an inlet of a primary air fan is 470 ℃, the temperature at F point of a primary air distribution main pipe is 465 ℃, the temperature at E point of an inlet of a secondary air fan is 473 ℃, and the temperature at C point of an inlet of a garbage pool meets the optimal temperature requirement of garbage fermentation of the garbage pool.
Claims (6)
1. A system for improving the inlet air temperature and the fuel calorific value of a garbage power station by tower type solar energy is characterized by comprising a garbage pool of the garbage power station, a primary air system, a secondary air system and a tower type solar heat collection, heat storage and heat exchange system connected with the primary air system and the secondary air system;
the tower type solar heat collection, heat storage and heat exchange system comprises a solar receiving tower (3), wherein the solar receiving tower (3) is connected with a solar receiving tower heat absorption heat exchanger (2), an outlet of the solar receiving tower heat absorption heat exchanger (2) is connected with a high-temperature molten salt tank (7) through a pipeline, an outlet of the high-temperature molten salt tank (7) is connected with an inlet of a high-temperature molten salt pump (8) through a pipeline, an outlet of the high-temperature molten salt pump (8) is connected with a molten salt/air heat exchanger (12) through a pipeline, a molten salt side low-temperature outlet of the molten salt/air heat exchanger (9) is connected with an inlet of a low-temperature molten salt tank (10) through a pipeline, an outlet of the low-temperature molten salt tank (10) is connected with an inlet of a low-temperature molten salt pump (11) through a pipeline, and an outlet of the low-temperature molten salt pump (11) is connected with an inlet of the solar receiving tower heat absorption heat exchanger (2) through a pipeline;
an air side inlet of the molten salt/air heat exchanger (12) is connected with the atmosphere, an air side outlet air pipe of the molten salt/air heat exchanger (12) is divided into two paths, one path is connected with a garbage pool air inlet adjusting air door (6) through a garbage pool air inlet pipe (9), and an outlet of the garbage pool air inlet adjusting air door (6) is connected with an air inlet at the bottom of the garbage pool through an air pipe; the other path is connected with a garbage pool air inlet bypass pipe adjusting air door (4) through a garbage pool air inlet bypass pipe (5), and the outlet of the garbage pool air inlet bypass pipe adjusting air door (4) is connected with a first air inlet pipe and a second air inlet pipe through air pipes.
2. The system for improving the inlet air temperature and the fuel calorific value of the refuse power plant through the tower type solar energy according to claim 1, wherein the solar energy receiving tower (3) is provided with heliostats at one side or around, a plurality of heliostats form a tower type solar energy fixed solar field (1), and each heliostat is provided with an independent two-dimensional tracking mechanism for automatically tracking the sun, so that reflected light can be accurately projected into the solar energy receiving tower heat absorption heat exchanger (2).
3. The tower type solar system for increasing the inlet air temperature and the fuel heat value of the refuse power station according to claim 1, wherein the refuse pool is a closed system.
4. The tower type solar system for improving the inlet air temperature and the fuel calorific value of the garbage power station according to claim 1, wherein the garbage pool, the primary air system and the secondary air system of the garbage power station comprise an air preheater, an air preheater bypass air duct (20) is arranged on the air preheater in parallel, an inlet air door (18) is arranged at the air inlet end of the air preheater, and an outlet air door (19) is arranged at the air outlet end of the air preheater;
set up rubbish entry one (13) at rubbish pool rubbish entrance, rubbish entry two (14), set up fuel input fuel entry one (15) at rubbish pool to boiler furnace fuel entry feeder hopper department, fuel entry two (16), rubbish bottom of the pool portion sets up rubbish pool air intake (21), rubbish pool upper portion sets up one, overgrate air suction opening (22), the primary air fan import sets up primary air temperature air door (23), the overgrate air fan import sets up overgrate air temperature air door (24), rubbish pool air inlet pipeline sets up rubbish pool air inlet temperature air door (25).
5. The operation method of the tower type solar system for increasing the inlet air temperature and the fuel heat value of the refuse power station based on any one of claims 1 to 4 is characterized by comprising the following steps;
(1) In the daytime, a low-temperature molten salt pump (11) conveys low-temperature molten salt to a solar receiving tower heat absorption heat exchanger (2), a tower type solar energy fixed-day environment field (1) focuses solar light on the solar receiving tower heat absorption heat exchanger (2), the solar receiving tower heat absorption heat exchanger (2) heats the low-temperature molten salt, the high-temperature molten salt is stored in a high-temperature molten salt tank (7), a high-temperature molten salt pump (8) conveys the high-temperature molten salt to a molten salt/air heat exchanger (12), the cooled high-temperature molten salt enters the low-temperature molten salt tank (10), air passing through the molten salt/air heat exchanger (12) is heated and then enters a garbage pool air inlet pipe (9) and a garbage pool air inlet bypass pipe (5), in the evening, the low-temperature molten salt pump (11) stops working, and the heating process of the low-temperature molten salt stops;
(2) After the air is added through a fused salt/air heat exchanger (12), one path of the air enters the garbage pool through a garbage pool air inlet pipe (9), a garbage pool air inlet adjusting air door (6) and a garbage pool air inlet (21), the temperature of the garbage in the garbage pool is accurately controlled by adjusting the opening degree of the garbage pool air inlet adjusting air door (6), the opening degree of the garbage pool air inlet bypass pipe adjusting air door (4) and the opening degree of the garbage pool air inlet temperature adjusting air door (25), so that the garbage fermentation is promoted, the garbage heat value is improved, and the air in the garbage pool enters a primary air inlet pipe and a secondary air inlet pipe through a primary air suction port and a secondary air suction port (22) at the upper part of the garbage pool; the other path enters a primary air inlet pipe and a secondary air inlet pipe through a garbage pool air inlet bypass pipe (5) and a garbage pool air inlet bypass pipe air damper (4);
(3) In the normal operation process, an air preheater bypass air door (17) is always in an open state, an air preheater inlet air door (18) and an air preheater outlet air door (19) are in a closed state, the air preheater does not work, steam is not consumed to heat primary air, the primary air is boosted through a primary air fan, enters an air preheater bypass air duct (20) from a primary air inlet pipe and a secondary air inlet pipe, and enters a primary air distribution main pipe after passing through the air preheater bypass air door (17); when the fused salt/air heat exchanger (12) cannot work normally or the primary air temperature is low, an inlet air door (18) and an outlet air door (19) of the air preheater are partially or completely opened, an air preheater bypass air door (17) is closed or closed, the air preheater starts to work, and partial or all air is heated by the air preheater and then mixed with primary air of an air preheater bypass air pipe to enter a primary air distribution main pipe, so that the primary air temperature requirement of the boiler is met; the primary air temperature adjusting air door (23) is used for reducing the inlet air temperature of the primary fan, and the air door can be opened in an emergency state;
(4) In the normal operation process, secondary air is boosted by a secondary fan and enters a boiler hearth from a primary air inlet pipe and a secondary air inlet pipe to participate in boiler combustion; the secondary air temperature adjusting air door (24) is used for reducing the inlet air temperature of the secondary fan, and the air door can be opened in an emergency state;
(5) The process that the garbage truck dumps rubbish to the rubbish pond does: firstly, opening a first garbage inlet door (13) and closing a second garbage inlet door (14) at the same time, and dumping garbage between the first garbage inlet door (13) and the second garbage inlet door (14); then, closing a first door (13) of the garbage inlet, and then opening a second door (14) of the garbage inlet, so that the garbage enters the garbage pool; finally, closing the two doors (14) of the garbage inlet, and finishing the garbage dumping process;
(6) The process of garbage entering the boiler furnace is as follows: firstly, opening a fuel inlet one-way door (15) at a fuel inlet hopper of a boiler furnace, and simultaneously closing a fuel inlet two-way door (16); then, the garbage grabbing hook grabs and then delivers the garbage into the feed hopper, and the garbage is positioned between a first fuel inlet door (15) and a second fuel inlet door (16); finally, the fuel inlet one-way door (15) is closed, then the fuel inlet two-way door (16) is opened, and the garbage enters the boiler furnace and participates in combustion.
6. The operation method of the tower type solar system for improving the inlet air temperature and the fuel heat value of the waste power station according to claim 5 is characterized in that under the condition of illumination in the daytime, the temperature of D point of the outlet of the solar energy receiving tower heat absorption heat exchanger (2) is 560 ℃, the temperature of air at the B point of the outlet of the molten salt/air heat exchanger (12) is 500 ℃, the temperature of D point of the inlet of the primary air fan is 470 ℃, the temperature of F point of the primary air distribution main pipe is 465 ℃, the temperature of E point of the inlet of the secondary air fan is 473 ℃, and the temperature of C point of the inlet of the waste pool meets the optimal temperature requirement of waste fermentation in the waste pool.
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