CN111847835A - Light and heat coal-fired coupled sludge drying system - Google Patents
Light and heat coal-fired coupled sludge drying system Download PDFInfo
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- CN111847835A CN111847835A CN202010728008.5A CN202010728008A CN111847835A CN 111847835 A CN111847835 A CN 111847835A CN 202010728008 A CN202010728008 A CN 202010728008A CN 111847835 A CN111847835 A CN 111847835A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/065—Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
- F03G6/067—Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
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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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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Abstract
The invention discloses a photo-thermal coal-fired coupling type sludge drying system which comprises a sludge pre-dryer, a sludge dryer, a unit steam source module and a photo-thermal steam source module; the control device is configured to: when detecting that the outlet steam of the photothermal steam generator meets a preset sludge drying steam condition, starting a photothermal steam drying mode, controlling the steam input end of the sludge dryer to be communicated with the steam output end of the photothermal steam generator, and starting the sludge dryer; when detecting that outlet steam of the photo-thermal steam generator meets the condition of sludge drying steam which is not preset, starting a unit auxiliary steam drying mode, controlling a steam input end of the sludge dryer to be communicated with a steam output end of a unit steam source module, and starting the sludge dryer. The photo-thermal and fire coal are coupled to provide a heat source for sludge drying, so that the influence on a unit thermodynamic system of a coal-fired power plant is reduced or even completely eliminated, and the energy utilization rate of the sludge drying system is improved.
Description
Technical Field
The invention relates to the technical field of sludge drying, in particular to a photo-thermal coal-fired coupling type sludge drying system.
Background
The sludge of urban sewage treatment plants in China is solid waste, mainly comprises primary sedimentation tank (grit chamber) and oil separation tank bottom mud, air flotation machine scum, residual activated sludge and chemical sludge of other process units, and has more complex components, the water content of the sludge from the urban sewage treatment plants is generally about 80 percent, the sludge is rich in nutrient components such as organic matters and the like, and the sludge also contains a certain amount of heavy metals, viruses, pathogens, parasitic ova and other harmful substances. In the water treatment industry of China, heavy water and light sludge are common phenomena for a long time, because sewage treatment enterprises have insufficient treatment capacity and backward treatment means, sludge is mainly buried traditionally, so that the problems that the landfill site is far difficult to meet the national specifications and requirements on sludge landfill in terms of facilities, technology and management and the like are solved, and the discharged pollutant gas and stink can bring serious influence on surrounding residents along with the change of climate and seasons; meanwhile, with the continuous acceleration of the urbanization process of society, the urban sewage treatment capacity is increased year by year, the sludge yield is increased continuously, the bearing capacity of downstream sludge treatment facilities is greatly exceeded, and the embarrassment of no-ground placement is quickly faced. Therefore, effective treatment is urgently required.
Compared with the traditional sludge treatment and disposal methods such as sanitary landfill, agricultural fertilizer application, pyrolysis and the like, the incineration method has the advantages of reduction, resource utilization, harmlessness, rapidness, energy recovery and the like, has wide application prospect, and the treatment modes comprise independent incineration and mixed incineration. However, the existing sludge has the characteristics of high moisture, high ash content, high viscosity and low calorific value, so that the sludge is separately burnt and has the defects of incomplete incineration, difficult separation of volatile components and the like. If the sludge and the pulverized coal are mixed and then sent to an active coal-fired boiler for combustion, the high-efficiency power generation technology and the environment-friendly treatment system of the coal-fired unit can be fully utilized, the problem of stable combustion of the sludge is solved, pollutants generated after combustion can be cleaned, an incinerator does not need to be invested additionally, and the problems of local sludge disposal and environmental pollution are fundamentally solved; in addition, the heat value of the sludge can be utilized to generate electricity and create income, and waste is changed into valuable. However, the coal-fired power plant has a high requirement on the safety of equipment operation, and wet sludge from a municipal sewage treatment plant has a high water content, so that the mixed fuel formed by directly mixing the wet sludge and pulverized coal is seriously deviated from the requirement of the design coal type of a power plant boiler due to the high water content. In view of this, in the prior art, in order to ensure safe and stable operation of a coal-fired unit for long-term sludge blending combustion, a sludge drying system for blending combustion after moisture content of wet sludge is reduced is designed and constructed, but the drying system usually adopts steam or flue gas as a heat source to dry sludge, which inevitably affects a unit thermodynamic system of a coal-fired power plant.
Disclosure of Invention
The invention provides a photo-thermal coal-fired coupling type sludge drying system, which aims to solve the technical problem that steam or flue gas adopted by sludge drying of the existing sludge drying system influences a unit thermodynamic system.
In order to solve the technical problem, an embodiment of the present invention provides a photo-thermal coal-fired coupled sludge drying system, which at least includes:
the sludge drying device at least comprises a sludge pre-dryer and a sludge dryer; the sludge output end of the sludge pre-dryer is connected to the sludge input end of the sludge dryer through a conveying pipeline;
the heat source device comprises a unit steam source module and a photo-thermal steam source module for converting light energy into fluid heat energy; the steam output end of the unit steam source module and the steam output end of the photo-thermal steam generator in the photo-thermal steam source module are respectively connected to the steam input end of the sludge dryer through pipelines;
a control device configured to:
when detecting that the outlet steam of the photo-thermal steam generator meets a preset sludge drying steam condition, starting a photo-thermal steam drying mode, controlling a steam input end of the sludge dryer to be communicated with a steam output end of the photo-thermal steam generator, and starting the sludge dryer;
when detecting light and heat steam generator's export steam satisfies not predetermined sludge drying steam condition, starts the supplementary mummification mode of unit, control sludge drier's steam input intercommunication the steam output of unit vapour source module, and start sludge drier.
In one embodiment of the present invention, the photo-thermal coal-fired coupled sludge drying system further includes:
the photo-thermal power generation device comprises a steam turbine, a generator and a storage battery pack;
the steam input end of the steam turbine is connected to the steam output end of the photothermal steam generator through a pipeline, the output end of the steam turbine is connected with the generator, the power output end of the generator is connected with the storage battery pack, and the storage battery pack is connected with the power supply end of the sludge pre-dryer;
the control apparatus is further configured to:
and when the photo-thermal power generation mode is operated, controlling the steam output end of the photo-thermal steam generator to be communicated with the steam turbine so as to enable the generator to generate power.
In one embodiment of the present invention, the photothermal vapor source module includes:
the solar energy thermal-insulation steam generator comprises an expansion tank, a heat-conducting fluid pump, a solar heat collector and the photo-thermal steam generator;
the fluid output end of the solar heat collector is connected to the fluid input end of the photothermal steam generator, the fluid output end of the photothermal steam generator is connected to the fluid input end of the heat-conducting fluid pump through the expansion tank, and the fluid output end of the heat-conducting fluid pump is connected to the fluid input end of the solar heat collector.
In one embodiment of the present invention, the photothermal vapor source module further includes a first electrically controlled valve controlled by the control device;
and the steam output end of the photo-thermal steam generator is connected to the steam input end of the sludge drier through the first electric control valve.
In one embodiment of the invention, the unit steam source module comprises a unit auxiliary steam main pipe and a second electric control valve controlled by the control device;
and the steam output end of the auxiliary steam main pipe of the unit is connected to the steam input end of the sludge drier through the second electric control valve.
In one embodiment of the invention, the sludge drying device further comprises a wet sludge storage bin and a sludge pre-dryer;
the sludge output end of the wet sludge storage bin is connected to the sludge input end of the sludge pre-drying device through a conveying pipeline, and the sludge output end of the sludge pre-drying device is connected to the sludge input end of the sludge drying device through a conveying pipeline.
In one embodiment of the invention, the sludge drying device further comprises a sewage treatment device;
the input end of the sewage treatment equipment is connected to the sewage discharge end of the sludge drier.
In one embodiment of the invention, the sludge drying device further comprises a boiler pulverizing system;
and a dried sludge outlet of the sludge dryer is connected to the boiler pulverizing system through a conveying mechanism.
In one embodiment of the present invention, the photo-thermal coal-fired coupled sludge drying system further includes:
a unit condenser, a steam cooler and water supplementing equipment;
the heat exchange fluid output end of the sludge drier is respectively connected with the input end of the unit condenser and the input end of the steam cooler;
the output of steam cooler the output of moisturizing equipment is connected to through the water pump light and heat steam generator's steam recovery end.
In one embodiment of the invention, a connecting pipeline between the unit steam source module and the steam input end of the sludge dryer and a connecting pipeline between the photo-thermal steam source module and the steam input end of the sludge dryer are provided with a plurality of manual valves.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
(1) the energy combination of photo-thermal and coal-fired is realized through the coupling unit steam source module and the photo-thermal steam source module, high-temperature steam is generated for the sludge drying system in a cooperative mode to dry the sludge, and the energy availability of the sludge drying system can be improved.
(2) When the photo-thermal steam drying mode is started and the machine set runs, steam of the auxiliary steam main pipe of the machine set is not needed, and the mode has no influence on a thermodynamic system of the machine set.
(3) When the auxiliary steam drying mode of the unit is started and the unit runs, because the sludge is pre-dried by the sludge pre-dryer, when certain wet sludge is dried, the auxiliary steam supply of the unit is smaller than that of the unit without the pre-dryer, and the mode reduces the influence on a thermodynamic system of the unit.
(4) When the sludge drying system performs sludge drying operation, two optional steam sources exist for drying sludge, wherein the heat of one steam source is from coal, the heat of the other steam source is from solar energy, and the availability of the sludge drying system is greatly increased due to the arrangement of the two steam sources.
(5) When no mud need carry out the mummification and handle, because of need not carrying out the mummification to mud this moment, then can be used for promoting small-size turbo generator set with the steam that light and heat steam generator produced and generate electricity, the electric energy storage that sends is in a set of battery, and this group of storage battery supplies power for mud pre-drying ware again when waiting to carry out the mud mummification, and this mode make full use of exerting oneself of light and heat module.
Drawings
FIG. 1 is a schematic structural diagram of a photothermal coal-fired coupled sludge drying system according to one embodiment of the invention;
FIG. 2 is a schematic diagram of a partition of a photothermal coal-fired coupled sludge drying system according to one embodiment of the invention;
FIG. 3 is a schematic diagram of the operation of the photothermal coal-fired coupled sludge drying system according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of the system operation in the auxiliary steam drying mode of the photo-thermal coal-fired coupled sludge drying system operating unit according to one embodiment of the invention;
FIG. 5 is a schematic diagram of the system operating in a photothermal steam drying mode of the photothermal coal-fired coupled sludge drying system according to one embodiment of the invention;
FIG. 6 is a schematic diagram of the system operation in the generator power generation mode of the photothermal coal-fired coupled sludge drying system according to one embodiment of the present invention;
wherein the reference numbers in the drawings of the specification are as follows:
1. a main steam pipe of the unit; 2. a first electrically controlled valve; 3. an electrically operated valve; 4. a wet sludge storage bin; 5. a sludge conveying pipeline; 6. wet sludge; 7. a sludge pre-dryer; 8. a sludge drier; 9. drying the sludge; 10. a boiler pulverizing system; 11. a steam turbine; 12. a generator; 13. a battery pack; 14. sewage treatment equipment; 15. a unit condenser; 16. a steam cooler; 17. water replenishing equipment; 18. a feed pump; 19. an expansion tank; 20. a heat transfer fluid pump; 21. a solar heat collector; 22. a photothermal steam generator; 23. a second electrically controlled valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 shows a photothermal coal-fired coupled sludge drying system according to an embodiment of the present invention, which at least includes:
the sludge drying device at least comprises a sludge pre-dryer 7 and a sludge dryer 8; the sludge output end of the sludge pre-dryer 7 is connected to the sludge input end of the sludge dryer 8 through a conveying pipeline;
the sludge drying device also comprises a wet sludge storage bin 4, a sludge pre-dryer 7, sewage treatment equipment 14 and a boiler pulverizing system 10;
the sludge output end of the wet sludge storage bin 4 is connected to the sludge input end of a sludge pre-drier 7 through a sludge conveying pipeline 5, the sludge output end of the sludge pre-drier 7 is connected to the sludge input end of a sludge drier 8 through a conveying pipeline, the input end of a sewage treatment device 14 is connected to the sewage discharge end of the sludge drier 8, and the dried sludge outlet of the sludge drier 8 is connected to a boiler pulverizing system 10 through a conveying mechanism.
The heat source device comprises a unit steam source module and a photo-thermal steam source module for converting light energy into fluid heat energy; the steam output end of the steam source module of the unit and the steam output end of the photo-thermal steam generator 22 in the photo-thermal steam source module are respectively connected to the steam input end of the sludge dryer 8 through pipelines;
wherein, light and heat vapour source module includes:
the solar energy heat collector comprises an expansion tank 19, a heat-conducting fluid pump 20, a solar heat collector 21, a photothermal steam generator 22 and a first electric control valve 3 controlled by a control device;
the fluid output end of the solar heat collector 21 is connected to the fluid input end of the photothermal steam generator 22, the fluid output end of the photothermal steam generator 22 is connected to the fluid input end of the heat transfer fluid pump 20 through the expansion tank 19, and the fluid output end of the heat transfer fluid pump 20 is connected to the fluid input end of the solar heat collector 21; the steam output end of the photothermal steam generator 22 is connected to the steam input end of the sludge dryer 8 through a first electric control valve.
The unit vapour source module includes:
the main steam pipe 1 of the unit and a second electric control valve 23 controlled by the control device;
the steam output end of the set auxiliary steam main pipe 1 is connected to the steam input end of the sludge drier 8 through a second electric control valve 23.
A control device configured to:
when detecting that the outlet steam of the photothermal steam generator 22 meets a preset sludge drying steam condition, starting a photothermal steam drying mode, controlling the steam input end of the sludge dryer 8 to be communicated with the steam output end of the photothermal steam generator 22, and starting the sludge dryer 8;
when detecting that the outlet steam of the photothermal steam generator 22 meets the condition of sludge drying steam which is not preset, starting the auxiliary steam drying mode of the unit, controlling the steam input end of the sludge dryer 8 to be communicated with the steam output end of the steam source module of the unit, and starting the sludge dryer 8.
In one embodiment of the present invention, the photothermal coal-fired coupled sludge drying system further includes:
the photo-thermal power generation device comprises a steam turbine 11, a generator 12 and a storage battery pack 13;
the steam input end of the steam turbine 11 is connected to the steam output end of the photothermal steam generator 22 through a pipeline, the output end of the steam turbine 11 is connected with the generator 12, the power output end of the generator 12 is connected with the storage battery pack 13, and the storage battery pack 13 is connected with the power supply end of the sludge pre-dryer 7;
a control device further configured to:
and controlling the steam output end of the photo-thermal steam generator 22 to be communicated with the steam turbine 11 to enable the generator 12 to generate power when the photo-thermal power generation mode is operated.
In addition, in one embodiment of the present invention, the photothermal coal-fired coupled sludge drying system further includes:
a unit condenser 15, a steam cooler 16 and a water supplementing device 17;
the heat exchange fluid output end of the sludge drier 8 is respectively connected with the input end of a condenser 15 of the unit and the input end of a steam cooler 16;
the output end of the steam cooler 16 and the output end of the water replenishing device 17 are connected to the steam recovery end of the photothermal steam generator 22 through a water pump.
In one embodiment of the invention, a plurality of hand valves 2 are arranged on a connecting pipeline between the steam source module of the unit and the steam input end of the sludge dryer 8 and a connecting pipeline between the photo-thermal steam source module and the steam input end of the sludge dryer 8.
In this embodiment, as shown in fig. 2, the sludge drying system is mainly divided into a steam module part and a photo-thermal module part, which are coupled by the photo-thermal steam generator 22, and the following detailed descriptions are respectively provided:
the photothermal module part is used for converting solar energy into heat energy of heat conducting fluid, and is formed by connecting a solar heat collector 21, a photothermal steam generator 22 (surface heat exchanger), an expansion tank 19 and a heat conducting fluid pump 20 through a heat conducting fluid pipeline. In operation, the heat transfer fluid is heated to a certain temperature in the solar heat collector 21, then sent to the steam generator for cooling, then pressurized by the heat transfer fluid pump 20, and then sent to the solar heat collector 21 for heating, and the volume change of the heat transfer fluid in the pipeline caused by thermal expansion and cold contraction is borne by the expansion tank 19.
The steam module part mainly functions to supply high-temperature steam to the sludge drier 8 (surface heat exchanger), secondarily functions to supply high-temperature steam to the small turbine generator 12 group, and specifically comprises a steam pipeline, a water pipe, a manual valve 2, an electric valve, the sludge drier 8, a sludge pre-drier 7 (electrically heated), a steam cooler 16 (surface heat exchanger), a photo-thermal steam generator 22, a water feed pump 18, a steam turbine 11, a generator 12 and a storage battery pack 13.
Wherein, steam module part can divide into again according to the difference of vapour source:
the steam source submodule and the photo-thermal steam source submodule of the set are coupled through a sludge drier 8 and a drying steam main pipe, and the operation principle is as follows:
a) when the steam source submodule of the unit is selected to operate, high-temperature steam is supplied by the auxiliary steam main pipe 1 of the unit, wet sludge 6 in the wet sludge storage bin 4 is conveyed to a sludge pre-drier 7 through a conveying pipeline and then conveyed to a sludge drier 8 to be dried by the high-temperature steam from the auxiliary steam main pipe 1 of the coal-fired unit, the dried sludge is conveyed to a coal conveying system or a pulverizing system to be mixed with raw coal, moisture in the wet sludge 6 is heated into a sludge steam-water mixture and then conveyed to a sewage treatment device 14 to be treated, and the cooled steam is conveyed to a condenser 15 of the unit to be cooled and then returns to a thermodynamic system of the steam turbine;
b) when the photo-thermal steam source submodule operates, high-temperature steam is provided by a steam generator at the moment, the steam can heat wet sludge in a sludge drier 8 or drive a small turbine generator 12 group to generate power, if the steam is used for drying the sludge, wet sludge 6 in a wet sludge storage bin 4 is conveyed to a sludge pre-drier 7 through a conveying pipeline and then conveyed to the sludge drier 8 to be dried by the high-temperature steam from the steam generator, dried dry sludge 9 after being dried is conveyed to a boiler pulverizing system 10 to be mixed with raw coal, moisture in the wet sludge 6 is heated into a sludge steam-water mixture and then conveyed to a sewage treatment device 14 to be treated, the cooled steam is conveyed to a steam cooler 16 to be cooled and then pressurized and conveyed to the steam generator through a water feeding pump 18 to be heated, if the steam is used for generating power, the small turbine generator 12 group is driven by the steam to generate power, and the generated power is conveyed to a group of storage batteries to be stored, the electric energy in the storage battery is mainly used for supplying power to the sludge preheater and is secondarily used for supplying power to a direct current load of the coal-fired power plant.
For convenience of understanding, as shown in fig. 3 to 6, the sludge drying system described above is operated in the following manner:
when wet sludge is sent to a coal-fired power plant for treatment, the system is operated in a drying mode, the drying of the common sludge needs high-temperature steam of about 200 ℃, for explaining the invention, the steam pressure for drying is required to reach 10bar, the temperature reaches 230 ℃, so as to realize better drying effect, and the steam parameter of the auxiliary steam main pipe 1 of the coal-fired unit can generally reach the level.
When the parameters of the outlet steam of the photothermal steam generator 22 do not reach the required values, a unit auxiliary steam drying steam commissioning operation order is executed, and for convenience of description, corresponding valves are numbered (the same below) as shown in fig. 3. The operation ticket mainly contains:
1) remotely operating to close the electric valves UV102 and UV 103;
2) manual valves HV102, HV103, HV202 are closed by field operation, and electric valves UV102, UV103 are confirmed to be closed again;
3) opening the electric valve UV101 by remote operation;
4) the manual valves HV101, HV301, HV302, HV201 are opened by the field operation. After the operation order is executed, the steam source sub-module of the unit is put into operation, the system state is as shown in fig. 4, and the valve black in fig. 4 represents closing, otherwise represents opening. At the moment, wet sludge 6 firstly passes through a sludge pre-drier 7 and then is dried in a sludge drier 8 by steam of the auxiliary steam main pipe 1 of the unit.
When wet sludge is sent to a coal-fired power plant for treatment, the system runs in a drying mode, and when steam parameters at the outlet of a steam generator reach required values, a solar photo-thermal drying steam operation ticket is executed, as shown in fig. 3, the operation ticket mainly contains:
1) remotely operating to close the electric valves UV101 and UV 103;
2) manual valves HV101, HV103, HV201 are closed by field operation, and the closing of electric valves UV101, UV103 is confirmed again;
3) opening the electric valve UV102 by remote operation;
4) the manual valves HV102, HV301, HV302, HV202 are opened by field operation. After the operation order is executed, the photo-thermal steam source submodule is put into operation, the system state is as shown in figure 5, the valve black in figure 5 represents closing, and the valve black in figure 5 represents opening. At this time, the wet sludge 6 passes through the sludge pre-drier 7 and then is dried in the sludge drier 8 by steam generated by solar photo-heat.
When the wet sludge of the coal-fired power plant does not need to be treated due to various reasons, the system operates in a power generation mode, and a 'solar photo-thermal power generation commissioning operation ticket' is executed as shown in fig. 3. The operation ticket mainly contains:
1) remotely operating to close the electric valves UV101 and UV 102;
2) manual valves HV101, HV301, HV302, HV201, HV202 were closed by field operation, and closing of electric valves UV101, UV102 was confirmed again;
3) opening the electric valve UV103 by remote operation;
4) the manual valves HV102, HV103 are opened by field operation. After the operation order is executed, the photo-thermal steam source submodule is put into operation, the system state is as shown in fig. 6, the valve black in fig. 6 represents closing, and the valve black in fig. 6 represents opening. At the moment, steam generated by solar photothermal is used for driving the small steam turbine 11 and the generator 12 set to generate electricity, electric energy is stored in the storage battery pack 13, and the storage battery pack 13 supplies power to the sludge pre-drying device 7 when sludge needs to be dried.
In summary, the embodiment of the invention has the following beneficial effects:
(6) the energy combination of photo-thermal and coal-fired is realized through the coupling unit steam source module and the photo-thermal steam source module, high-temperature steam is generated for the sludge drying system in a cooperative mode to dry the sludge, and the energy availability of the sludge drying system can be improved.
(7) When the photo-thermal steam drying mode is started and the machine set runs, steam of the auxiliary steam main pipe 1 of the machine set is not needed, and the mode has no influence on a thermodynamic system of the machine set.
(8) When the auxiliary steam drying mode of the unit is started and the unit runs, because the sludge is pre-dried by the sludge pre-dryer 7, when certain wet sludge is dried, the auxiliary steam supply of the unit is smaller than that of the unit without the pre-dryer, and the mode reduces the influence on a thermodynamic system of the unit.
(9) When the sludge drying system performs sludge drying operation, two optional steam sources exist for drying sludge, wherein the heat of one steam source is from coal, the heat of the other steam source is from solar energy, and the availability of the sludge drying system is greatly increased due to the arrangement of the two steam sources.
(10) When no mud need carry out the mummification and handle, because of need not carrying out the mummification to mud this moment, then can be used for promoting small-size turbo generator set with the steam that light and heat steam generator 22 produced and generate electricity, the electric energy storage that sends is in a set of battery, and this group of storage battery 13 supplies power for mud pre-drying ware 7 again when waiting to carry out the mud mummification, and this mode make full use of the power output of light and heat module.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a coal-fired manifold type sludge drying system of light and heat which characterized in that includes at least:
the sludge drying device at least comprises a sludge pre-dryer and a sludge dryer; the sludge output end of the sludge pre-dryer is connected to the sludge input end of the sludge dryer through a conveying pipeline;
the heat source device comprises a unit steam source module and a photo-thermal steam source module for converting light energy into fluid heat energy; the steam output end of the unit steam source module and the steam output end of the photo-thermal steam generator in the photo-thermal steam source module are respectively connected to the steam input end of the sludge dryer through pipelines;
a control device configured to:
when detecting that the outlet steam of the photo-thermal steam generator meets a preset sludge drying steam condition, starting a photo-thermal steam drying mode, controlling a steam input end of the sludge dryer to be communicated with a steam output end of the photo-thermal steam generator, and starting the sludge dryer;
when detecting light and heat steam generator's export steam satisfies not predetermined sludge drying steam condition, starts the supplementary mummification mode of unit, control sludge drier's steam input intercommunication the steam output of unit vapour source module, and start sludge drier.
2. The photothermal coal-fired coupled sludge drying system of claim 1, further comprising:
the photo-thermal power generation device comprises a steam turbine, a generator and a storage battery pack;
the steam input end of the steam turbine is connected to the steam output end of the photothermal steam generator through a pipeline, the output end of the steam turbine is connected with the generator, the power output end of the generator is connected with the storage battery pack, and the storage battery pack is connected with the power supply end of the sludge pre-dryer;
the control apparatus is further configured to:
and when the photo-thermal power generation mode is operated, controlling the steam output end of the photo-thermal steam generator to be communicated with the steam turbine so as to enable the generator to generate power.
3. The photothermal coal-fired coupled sludge drying system of claim 1, wherein the photothermal steam source module comprises:
the solar energy thermal-insulation steam generator comprises an expansion tank, a heat-conducting fluid pump, a solar heat collector and the photo-thermal steam generator;
the fluid output end of the solar heat collector is connected to the fluid input end of the photothermal steam generator, the fluid output end of the photothermal steam generator is connected to the fluid input end of the heat-conducting fluid pump through the expansion tank, and the fluid output end of the heat-conducting fluid pump is connected to the fluid input end of the solar heat collector.
4. The photothermal coal-fired coupled sludge drying system of claim 1 or 3, wherein the photothermal steam source module further comprises a first electrically controlled valve controlled by the control device;
and the steam output end of the photo-thermal steam generator is connected to the steam input end of the sludge drier through the first electric control valve.
5. The photo-thermal coal-fired coupled sludge drying system of claim 1, wherein the unit steam source module comprises a unit auxiliary steam main pipe and a second electric control valve controlled by the control device;
and the steam output end of the auxiliary steam main pipe of the unit is connected to the steam input end of the sludge drier through the second electric control valve.
6. The photo-thermal coal-fired coupled sludge drying system of claim 1, wherein the sludge drying device further comprises a wet sludge storage bin;
and the sludge output end of the wet sludge storage bin is connected to the sludge input end of the sludge pre-drying device through a conveying pipeline.
7. The photo-thermal coal-fired coupled sludge drying system of claim 1, wherein the sludge drying device further comprises a sewage treatment facility;
the input end of the sewage treatment equipment is connected to the sewage discharge end of the sludge drier.
8. The photothermal coal-fired coupled sludge drying system of claim 1, wherein the sludge drying device further comprises a boiler pulverizing system;
and a dried sludge outlet of the sludge dryer is connected to the boiler pulverizing system through a conveying mechanism.
9. The photothermal coal-fired coupled sludge drying system of claim 1, further comprising:
a unit condenser, a steam cooler and water supplementing equipment;
the heat exchange fluid output end of the sludge drier is respectively connected with the input end of the unit condenser and the input end of the steam cooler;
the output of steam cooler the output of moisturizing equipment is connected to through the water pump light and heat steam generator's steam recovery end.
10. The photo-thermal coal-fired coupled sludge drying system of claim 1, wherein a connecting pipeline between the unit steam source module and the steam input end of the sludge dryer, and a connecting pipeline between the photo-thermal steam source module and the steam input end of the sludge dryer are provided with a plurality of manual valves.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115403231A (en) * | 2022-09-01 | 2022-11-29 | 昆明明书科技有限公司 | Flexible mummification production line of super supercritical low carbon heat source of mud |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115403231A (en) * | 2022-09-01 | 2022-11-29 | 昆明明书科技有限公司 | Flexible mummification production line of super supercritical low carbon heat source of mud |
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