CN215403774U - Novel sludge heat pump drying system - Google Patents
Novel sludge heat pump drying system Download PDFInfo
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- CN215403774U CN215403774U CN202121633712.9U CN202121633712U CN215403774U CN 215403774 U CN215403774 U CN 215403774U CN 202121633712 U CN202121633712 U CN 202121633712U CN 215403774 U CN215403774 U CN 215403774U
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Abstract
The utility model discloses a novel sludge heat pump drying system which comprises a heat conduction oil circulating unit, an organic Rankine circulating unit, a steam compression circulating unit, a sludge drying unit and a control unit, wherein the heat conduction oil circulating unit is connected with the organic Rankine circulating unit; the heat conduction oil circulation unit is connected with the organic Rankine cycle unit through the generator, the steam compression circulation unit is connected with the sludge drying unit through the drying condenser and the dehumidifying evaporator, the sludge drying unit is connected with the heat conduction oil circulation unit through the dry sludge conveying belt, and the control unit is electrically connected with the heat conduction oil circulation unit, the organic Rankine cycle unit, the steam compression circulation unit and the sludge drying unit respectively. The utility model fully utilizes the heat energy generated by the combustion of the dry sludge, drives the vapor compression cycle unit through the organic Rankine cycle, dehumidifies and heats the air, and simultaneously generates electricity through the organic Rankine cycle, provides the electric energy required by all electric equipment and electric appliances of the drying system, does not need other energy sources to be input, and realizes the zero-energy-consumption efficient operation of the sludge drying system.
Description
Technical Field
The utility model relates to the technical field of drying, in particular to a novel sludge heat pump drying system.
Background
Sludge drying is used as the final link of sludge treatment, and has a vital role in the treatment and disposal process of sludge. The heat pump hot air type sludge drying has the advantages of low energy consumption and good drying effect, realizes the drying reduction of the sludge in a heat convection mode, and is more and more widely applied in recent years.
The sludge is used as a companion of sewage treatment, the sludge contains 40% of organic biomass, and the sludge is considered as waste and a biomass energy source and has flammability.
The organic Rankine cycle is a Rankine cycle with low-boiling-point organic matters as working media, the organic working media absorb heat in a generator to generate steam with certain pressure and temperature, the steam enters a steam turbine or an expansion machine to do work so as to drive a generator or drive other power machinery, the steam discharged from the steam turbine or the expansion machine releases heat to cooling water in a condenser and is condensed into liquid, the liquid organic working media are returned to the generator again by virtue of a working medium pump, and the organic Rankine cycle is continuously circulated.
The heat energy generated by the combustion of the dry sludge can drive a generator to provide electric energy required in the sludge drying process through organic Rankine cycle, and simultaneously drive a compressor required by the sludge drying through a heat pump.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel sludge heat pump drying system, which drives a vapor compression cycle unit through organic Rankine cycle to dehumidify and heat air, and simultaneously generates electricity through the organic Rankine cycle to provide electric energy required by all electric equipment and electric appliances of the drying system without inputting other energy sources, so that the zero-energy-consumption efficient operation of the sludge drying system is realized.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a novel sludge heat pump drying system comprises a heat conduction oil circulation unit, an organic Rankine circulation unit, a steam compression circulation unit, a sludge drying unit and a control unit;
the heat conduction oil circulation unit comprises a sludge burning boiler, a generator and a heat conduction oil pump which are sequentially connected through pipelines to form a loop, and is connected with the organic Rankine cycle unit through the generator;
the organic Rankine cycle unit comprises a generator, a steam turbine, a generator, an expander, a condenser and a working medium pump, wherein the generator is respectively connected with the steam turbine and the expander through pipelines;
the steam compression circulation unit comprises a compressor, a drying condenser, a throttling expansion valve and a dehumidifying evaporator which are sequentially connected through pipelines to form a loop, and is connected with the sludge drying unit through the drying condenser and the dehumidifying evaporator;
the sludge drying unit comprises a drying condenser, a circulating fan, a sludge drying chamber, a dehumidifying evaporator and a dry sludge conveyor belt, wherein the drying condenser, the circulating fan, the sludge drying chamber and the dehumidifying evaporator are sequentially connected through air pipes to form a circulating loop;
the control unit is respectively and electrically connected with the heat conduction oil circulation unit, the organic Rankine circulation unit, the steam compression circulation unit and the sludge drying unit.
Preferably, adjacent channels of the generator respectively flow heat conduction oil and organic working media, and the flow direction of the heat conduction oil is generally opposite to that of the organic working media.
Preferably, the dehumidification evaporator and the drying condenser are both fin-tube heat exchangers, and fins of the dehumidification evaporator are vertically downward.
Preferably, the system fully utilizes heat energy generated by combustion of the dry sludge, the vapor compression cycle unit is driven through the organic Rankine cycle to dehumidify and heat air, and meanwhile, the power is generated through the organic Rankine cycle to provide electric energy required by all electric equipment and electric appliances of the drying system.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, a steam turbine in the organic Rankine cycle unit is connected with a generator through a direct drive shaft, and an expander in the organic Rankine cycle unit is connected with a compressor of the steam compression cycle unit through the direct drive shaft, so that the power transmission efficiency of the system is improved; meanwhile, the expander in the organic Rankine cycle unit directly drives the compressor of the vapor compression cycle unit, extra electric energy is not needed to drive the compressor, the conversion loss between mechanical energy and electric energy is reduced, and the energy efficiency of the organic Rankine cycle unit is remarkably improved.
2. Mechanical energy output by an expander in the organic Rankine cycle unit in a working mode is transmitted to a compressor of the steam compression cycle unit through the direct drive shaft to drive the steam compression cycle unit, a drying condenser in the steam compression cycle unit releases heat to heat low-temperature dry air, the condensing temperature in the steam compression cycle unit is reduced, meanwhile, a dehumidifying evaporator in the steam compression cycle unit absorbs heat to cool and dehumidify the low-temperature humid air, the evaporating temperature in the steam compression cycle unit is increased, and the energy efficiency of the steam compression cycle unit is remarkably improved.
3. The utility model fully utilizes the heat energy generated by the combustion of the dry sludge, generates electricity through organic Rankine cycle, and the electricity required by all electric equipment (a heat-conducting oil pump, a working medium pump, a circulating fan, a wet sludge conveying belt and a dry sludge conveying belt) and electric devices (a throttle expansion valve and a controller) of the sludge drying system can be completely provided by the electricity generated by the generator without other energy input, thereby realizing the zero-energy-consumption high-efficiency operation of the sludge drying system.
Drawings
FIG. 1 is a schematic diagram of a novel sludge heat pump drying system of the present invention.
Description of reference numerals: 1-a mud-fired boiler; 2-a generator; 3-a heat conducting oil pump; 4-a steam turbine; 5-a generator; 6-an expander; 7-a condenser; 8-a working medium pump; 9-a compressor; 10-drying the condenser; 11-a throttle expansion valve; 12-a dehumidifying evaporator; 13-a wet sludge conveyor; 14-a circulating fan; 15-dry sludge collector; 16-dry sludge conveyor belt; a-a sludge drying chamber; a-a wet sludge inlet; b-a dry sludge outlet; c-a return air inlet; d-a low temperature humid air inlet; e-a low temperature dry air outlet; f-a low temperature dry air inlet; g-high temperature dry air outlet; h-an air supply outlet; i-dry sludge inlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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.
As shown in fig. 1, the novel sludge heat pump drying system of the present invention includes a heat conduction oil circulation unit, an organic rankine cycle unit, a vapor compression circulation unit, a sludge drying unit, and a control unit.
The conduction oil circulation unit comprises a sludge burning boiler 1, a generator 2 and a conduction oil pump 3 which are sequentially connected through pipelines to form a conduction oil circulation loop, and the conduction oil circulation unit is connected with the organic Rankine cycle unit through the generator 2.
The organic Rankine cycle unit comprises a generator 2, a steam turbine 4, a generator 5, an expander 6, a condenser 7 and a working medium pump 8, wherein the generator 2 is respectively connected with the steam turbine 4 and the expander 6 through pipelines, the steam turbine 4 is connected with the generator 5 through a direct drive shaft, the expander 6 is connected with a compressor 9 of the steam compression cycle unit through the direct drive shaft, the steam turbine 4 and the expander 6 are connected with the condenser 7 through pipelines, the condenser 7 is connected with the working medium pump 8 through a pipeline, and the working medium pump 8 is connected with the generator 2 through a pipeline to form an organic working medium circulation loop.
The vapor compression circulation unit comprises a compressor 9, a drying condenser 10, a throttle expansion valve 11 and a dehumidifying evaporator 12 which are sequentially connected through pipelines to form a refrigerant circulation loop, and the vapor compression circulation unit is connected with the sludge drying unit through the drying condenser 10 and the dehumidifying evaporator 12.
The sludge drying unit comprises a drying condenser 10, a circulating fan 14, a sludge drying chamber A, a dehumidifying evaporator 12 and a dry sludge conveyor belt 16, wherein the drying condenser 10, the circulating fan 14, the sludge drying chamber A and the dehumidifying evaporator 12 are sequentially connected through air pipes to form a circulating loop, a wet sludge conveyor belt 13 and a dry sludge collector 15 are arranged in the sludge drying chamber A, the wet sludge conveyor belt 13 is located above the dry sludge collector 15, and dry sludge in the sludge drying chamber A of the sludge drying unit is conveyed to a sludge combustion boiler 1 of the heat conduction oil circulating unit through the dry sludge conveyor belt 16.
The control unit is respectively connected with the heat conduction oil circulation unit, the organic Rankine circulation unit, the steam compression circulation unit and the sludge drying unit, and the automatic operation of the system is controlled.
Preferably, the adjacent channels of the generator 2 are respectively flowed through the heat transfer oil and the organic working medium, and the flow direction of the heat transfer oil is generally opposite to that of the organic working medium.
Preferably, the dehumidifying evaporator 12 and the drying condenser 10 are both fin-tube heat exchangers, and the fins of the dehumidifying evaporator 12 are directed vertically downward.
The utility model fully utilizes the heat energy generated by the combustion of the dry sludge, drives the vapor compression cycle unit through the organic Rankine cycle, dehumidifies and heats the air, and simultaneously provides the electric energy required by all electric equipment and electric appliances of the drying system through the organic Rankine cycle power generation, and the specific working process is as follows:
the dry sludge is under the effect of dry sludge conveyer belt 16, transport to the dry sludge entry i who fires mud boiler 1 from the dry sludge export b of sludge drying chamber A, dry sludge is burning in firing mud boiler 1, microthermal conduction oil is heated up in firing mud boiler 1, the conduction oil of intensification is carried to generator 2 under the effect of conduction oil pump 3, high temperature conduction oil gives organic working medium with energy transfer in generator 2, enter through conduction oil pump 3 after the cooling and fire mud boiler 1 and heat again, accomplish the conduction oil circulation so.
The organic working medium absorbs heat of heat conducting oil in the generator 2 to become saturated steam, the generated saturated steam respectively enters the steam turbine 4 and the expansion machine 6 to do work, the steam which does the work enters the condenser 7 to be cooled into liquid, the liquid is pressurized by the working medium pump 8 and then returns to the generator 2 to absorb heat, and the organic Rankine cycle is completed.
A steam turbine 4 in the organic Rankine cycle unit is connected with a generator 5 through a direct drive shaft, and electricity generated by the generator 5 is transmitted to all electric equipment (a heat conduction oil pump 3, a working medium pump 8, a circulating fan 14, a wet sludge conveying belt 13 and a dry sludge conveying belt 16) and electric equipment (a throttle expansion valve 11 and a controller) of a sludge drying system through electric wires.
Mechanical energy output by an expander 6 in the organic Rankine cycle unit in a working mode is transmitted to a compressor 9 of the vapor compression cycle unit through a direct drive shaft, the compressor 9 compresses low-temperature and low-pressure refrigerant vapor into high-temperature and high-pressure refrigerant vapor, the high-temperature and high-pressure refrigerant vapor is condensed into high-pressure refrigerant liquid in a drying condenser 10, the high-pressure refrigerant liquid coming out of the drying condenser 10 flows into a throttle expansion valve 11 through a pipeline, the high-pressure refrigerant liquid enters a dehumidifying evaporator 12 after being throttled by the throttle expansion valve 11 to form refrigerant gas-liquid mixture, the refrigerant gas-liquid mixture in the dehumidifying evaporator 12 absorbs heat of low-temperature humid air to become low-pressure refrigerant gas, and the low-pressure refrigerant gas enters the compressor 9 to be compressed, so that a vapor compression cycle is completed.
A dehumidifying evaporator 12 in the steam compression circulating unit absorbs heat to cool and dehumidify low-temperature wet air at a low-temperature wet air inlet d, low-temperature dry air formed by cooling and dehumidifying is conveyed from a low-temperature dry air outlet e to a low-temperature dry air inlet f under the action of a circulating fan 14, a drying condenser 10 in the steam compression circulating unit releases heat to heat and warm the low-temperature dry air at the low-temperature dry air inlet f, high-temperature air formed by heating and warming is conveyed from a high-temperature dry air outlet g to an air supply outlet h under the action of the circulating fan 14, high-temperature air at the air supply outlet h is conveyed to a sludge drying chamber A under the action of the circulating fan 14 to perform heat and mass exchange with wet sludge entering from a wet sludge inlet a, the wet sludge on a wet sludge conveyor belt 13 is dried by the high-temperature dry air to become dry sludge, and the generated dry sludge reaches a dry sludge outlet b after being collected by a dry sludge collector 15, meanwhile, the high-temperature dry air absorbs moisture in the wet sludge to form low-temperature wet air, and the formed low-temperature wet air is conveyed to the low-temperature wet air inlet d from the air return opening c under the action of the circulating fan 14, so that the sludge is dried.
The dry sludge collected by the dry sludge collector 15 is conveyed from the dry sludge outlet b to the dry sludge inlet i of the sludge burning boiler 1 under the action of the dry sludge conveyor belt 16, and the dry sludge is burned in the sludge burning boiler 1 to generate heat, so that the energy supply of the drying system is completed.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (4)
1. A novel sludge heat pump drying system is characterized in that: the system comprises a heat conduction oil circulation unit, an organic Rankine circulation unit, a steam compression circulation unit, a sludge drying unit and a control unit;
the heat conduction oil circulation unit comprises a sludge burning boiler, a generator and a heat conduction oil pump which are sequentially connected through pipelines to form a loop, and is connected with the organic Rankine cycle unit through the generator;
the organic Rankine cycle unit comprises a generator, a steam turbine, a generator, an expander, a condenser and a working medium pump, wherein the generator is respectively connected with the steam turbine and the expander through pipelines;
the steam compression circulation unit comprises a compressor, a drying condenser, a throttling expansion valve and a dehumidifying evaporator which are sequentially connected through pipelines to form a loop, and is connected with the sludge drying unit through the drying condenser and the dehumidifying evaporator;
the sludge drying unit comprises a drying condenser, a circulating fan, a sludge drying chamber, a dehumidifying evaporator and a dry sludge conveyor belt, wherein the drying condenser, the circulating fan, the sludge drying chamber and the dehumidifying evaporator are sequentially connected through air pipes to form a circulating loop;
the control unit is respectively and electrically connected with the heat conduction oil circulation unit, the organic Rankine circulation unit, the steam compression circulation unit and the sludge drying unit.
2. The novel sludge heat pump drying system of claim 1, wherein: the adjacent channels of the generator respectively flow through the heat conduction oil and the organic working medium, and the flow direction of the heat conduction oil is opposite to that of the organic working medium on the whole.
3. The novel sludge heat pump drying system of claim 1, wherein: the dehumidification evaporator and the drying condenser are both fin tube type heat exchangers, and fins of the dehumidification evaporator are vertically downward.
4. The novel sludge heat pump drying system of claim 1, wherein: the system fully utilizes heat energy generated by combustion of the dry sludge, drives the vapor compression cycle unit through the organic Rankine cycle, dehumidifies and heats air, and simultaneously generates electricity through the organic Rankine cycle to provide electric energy required by all electric equipment and electric appliances of the drying system.
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| CN202121633712.9U CN215403774U (en) | 2021-07-16 | 2021-07-16 | Novel sludge heat pump drying system |
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| CN202121633712.9U CN215403774U (en) | 2021-07-16 | 2021-07-16 | Novel sludge heat pump drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113415973A (en) * | 2021-07-16 | 2021-09-21 | 中国科学院广州能源研究所 | Novel sludge heat pump drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113415973A (en) * | 2021-07-16 | 2021-09-21 | 中国科学院广州能源研究所 | Novel sludge heat pump drying system |
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