CN111207408B - Intelligent waste heat recovery system - Google Patents
Intelligent waste heat recovery system Download PDFInfo
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- CN111207408B CN111207408B CN202010053976.0A CN202010053976A CN111207408B CN 111207408 B CN111207408 B CN 111207408B CN 202010053976 A CN202010053976 A CN 202010053976A CN 111207408 B CN111207408 B CN 111207408B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model relates to a waste heat recovery technical field, specifically disclose waste heat intelligence recovery system, it specifically discloses waste heat intelligence recovery system, it adopts and sets up the surface cooler in the flue gas recovery room, and adjust indoor flue gas and the air ratio of mixing arrangement control flue gas recovery through intelligent amount of wind and flue gas, thereby with the indoor temperature control of flue gas recovery at the value of relatively stable, utilize contrary carnot cycle principle, absorb heat in the burner exhaust flue gas, through consuming a small amount of electric energy, convert the heat of absorption into the heat energy that needs in life or the production, can regard as the heat source in fields such as heating, hot water preparation, stoving.
Description
Technical Field
The invention relates to the technical field of waste heat recovery, in particular to an intelligent waste heat recovery system.
Background
At present, smoke is the main way of wasting energy of general energy consumption equipment, for example, the energy consumption of boiler smoke is about 15%, and other equipment such as setting machine, drying machine and kiln of printing and dyeing industry all consume energy through smoke. The flue gas waste heat recovery mainly converts the heat carried by the flue gas into the heat which can be utilized through a certain heat exchange mode. The tail exhaust gas temperature of small and medium-sized gas boilers is generally 170-210 ℃, the potential of waste heat recovery is large, but at present, the gas boilers are not provided with heat exchange equipment generally, so that how to recover the energy carried by the flue gas is still a problem to be solved urgently.
Disclosure of Invention
The invention aims to provide an intelligent waste heat recovery system to recover heat energy carried in flue gas, and a parallel air heat pump unit can be kept in an optimal working condition.
The waste heat intelligent recovery system comprises a smoke exhaust pipeline, a smoke receiving device and an air heat pump unit; a smoke recovery port is arranged on the smoke exhaust pipeline, and a first smoke adjusting air valve is arranged in the smoke recovery port;
the flue gas recovery device comprises a flue gas recovery chamber, a heat pump surface cooler and an induced draft fan, wherein the heat pump surface cooler and the induced draft fan are arranged in the flue gas recovery chamber; the side wall of the flue gas recovery chamber is provided with an air outlet which can be communicated with the outside and the circulation chamber, the air outlet is opposite to an air outlet of the induced draft fan, and the air outlet is provided with an air exhaust adjusting air valve;
the refrigerant of the air heat pump unit enters the condenser for heat exchange after being compressed by the compressor, and then enters the heat pump surface air cooler for evaporation and then returns to the compressor.
The technical principle of the scheme is as follows:
the heat pump surface cooler arranged in the smoke recovery chamber replaces an evaporator of an air heat pump unit, the smoke recovery chamber is mixed with smoke through air volume regulation, the temperature in the smoke recovery chamber is controlled at the optimal working temperature of the air heat pump unit, the heat in smoke discharged by a combustion device is absorbed by utilizing the reverse Carnot cycle principle, and therefore the absorbed heat is converted into heat energy required in life or production through consuming a small amount of electric energy, and the heat source can be used as a heat source in the fields of heating, hot water preparation, drying and the like.
In this scheme, the draught fan work in the flue gas recovery chamber for the air current is along the flue gas inlet in the mixing chamber, heat pump surface cooler and draught fan flow in proper order, thereby the mixing chamber will be through flue gas inlet from the outside air that inhales, and because the flue gas recovery port is relative with the flue gas inlet, the flue gas is concentrated in flue gas inlet department in a large number after the port discharge is retrieved to the flue gas, when consequently the air admission mixing chamber, the flue gas also will get into the mixing chamber, thereby make air and flue gas mix, reduce the flue gas temperature. The exhaust amount of the flue gas from the flue gas recovery port can be adjusted by adjusting the opening degree of the first flue gas adjusting air valve, so that the mixing proportion of the air and the flue gas in the mixing chamber is changed.
The air outlet is opposite to the air outlet of the induced draft fan, so that the air flow discharged from the induced draft fan can discharge the air outlet; the air flow discharged from the induced draft fan can be limited to be discharged from the air outlet by changing the opening of the air exhaust adjusting air valve; and the other part of the air flow discharged from the induced draft fan enters the circulating chamber and enters the mixing chamber through the circulating air port. When the temperature of the airflow discharged from the air outlet of the induced draft fan is higher than the temperature of the external air, the opening degree of the air valve can be adjusted by reducing the discharged air, part of the airflow enters the mixing chamber again, the heat of the airflow is repeatedly absorbed by the surface air cooler of the heat pump, and the smoke discharge temperature can be reduced.
The beneficial effect of this scheme lies in:
1. the waste heat of the flue gas is utilized, the emission temperature of the waste flue gas is effectively reduced, and the purposes of energy conservation and environmental protection are achieved.
2. Through the regulation and mixing of the air quantity and the temperature, the operation working condition of the system is always maintained at the optimal working condition of the air heat pump unit, the device is always in a high-efficiency state, and the phenomenon that the operation energy efficiency of the heat pump is reduced due to frosting of a surface cooler of the heat pump under the low-temperature climate condition is effectively avoided.
The first preferred scheme is as follows: as a further optimization of the basic scheme, the flue gas recovery device comprises a temperature control module, the temperature control module comprises a controller and a first temperature sensor arranged in the mixing chamber, and the first temperature sensor is electrically connected with the controller; the first flue gas adjusting air valve is an electric valve and is electrically connected with the controller.
In preferred scheme one, through the temperature in the first temperature sensor control mixing chamber to with the temperature feedback to the controller in the mixing chamber, when the temperature in the mixing chamber is higher than the default, the controller will control first flue gas and adjust the blast gate and adjust little aperture, thereby makes the flue gas volume that gets into the mixing chamber reduce, thereby makes the temperature reduction in the mixing chamber. When the temperature in the mixing chamber is lower than the preset value, the opening degree of the first smoke adjusting air valve is increased, so that smoke entering the mixing chamber is increased, and the temperature in the mixing chamber is increased.
The preferred scheme II is as follows: as a further optimization of the first preferred scheme, a first electric adjusting air valve is arranged at the flue gas inlet and is electrically connected with the controller.
In the second preferred scheme, the flow rate of the flue gas entering the mixing chamber from the flue gas inlet can be changed by adjusting the opening degree of the first electric adjusting air valve; when the temperature in the mixing chamber is higher than a preset value, firstly, the controller controls the opening of the first electric adjusting air valve to increase, and along with the increase of the opening of the first electric adjusting air valve, as the flue gas is gathered around the flue gas recovery port and the ambient air is exhausted, the flue gas inlet firstly sucks the flue gas and then sucks the air, so that the air suction amount can be increased by increasing the opening of the flue gas inlet, and the temperature in the mixing chamber is reduced; when the opening degree of the first electric adjusting air valve is increased to the maximum value and the temperature in the mixing chamber is still higher than the preset value, the opening degree of the first smoke adjusting air valve is controlled to be reduced.
When the temperature in the mixing chamber is lower than a preset value, the controller firstly controls the opening of the first electric adjusting air valve to be reduced, and the smoke inlet firstly sucks smoke, so that the suction amount of air is reduced, and the temperature in the mixing chamber is increased; if the opening degree of the first electric adjusting air valve is reduced to the minimum value, and the temperature in the mixing chamber is still smaller than the preset value, the controller controls the opening degree of the first smoke adjusting air valve to be increased.
The preferable scheme is three: as a further optimization of the second preferred scheme, a second electric adjusting air valve is arranged at the circulating air port and electrically connected with the controller. The opening degree of the second electric adjusting air valve and the opening degree of the first electric adjusting air valve are controlled and synchronously adjusted by the controller.
The preferable scheme is four: as a further optimization of the third preferred scheme, a second temperature sensor is arranged at the air outlet and electrically connected with the controller; the air exhaust adjusting air valve is an electric valve and is electrically connected with the controller. The second temperature sensor monitors the temperature of the air flow discharged from the air outlet, and when the temperature at the air outlet is too high, the controller controls the opening degree of the air discharge adjusting damper to be reduced, thereby promoting the air flow to circulate in the mixing chamber and the circulation chamber.
The preferable scheme is five: as a further optimization of the preferable scheme four, the exhaust outlet is arranged at the top of the flue gas recovery chamber, and the flue gas inlet is arranged at the bottom of the flue gas recovery chamber; flue gas inlet, circulation wind gap, heat pump surface cooler, draught fan and air exit set gradually from supreme down.
In the preferred scheme five, as the density of the hot air is less than that of the cold air, the hot air flows from bottom to top; therefore, the smoke inlet is arranged at the bottom of the smoke recovery chamber, which is beneficial to sucking the smoke into the smoke recovery chamber. And the flue gas inlet, the circulating air port, the heat pump surface air cooler, the draught fan and the air outlet are sequentially arranged from bottom to top, so that the air flow is facilitated to pass through the heat pump surface air cooler.
The preferable scheme is six: as a further optimization to the fifth preferred scheme, the smoke exhaust pipeline comprises a main pipeline and a waste heat recovery flue, a second smoke regulating valve electrically connected with the controller is arranged in the main pipeline, one end of the waste heat recovery flue is arranged below the second smoke regulating valve and communicated with the main pipeline, and a smoke recovery port is arranged at the other end of the waste heat recovery flue. When the controller controls the opening of the first flue gas regulating valve to be reduced, the controller synchronously controls the opening of the second flue gas regulating valve to be increased, so that the discharge amount of the flue gas in the main pipeline and the waste heat recovery flue can be more accurately controlled.
The preferable scheme is seven: as a further optimization of the preferable scheme six, an electric energy conversion device is arranged at the top of the main pipeline and comprises a storage battery, a first evaporation chamber, a second evaporation chamber and a cylinder body, and the storage battery is electrically connected with an induced draft fan; one end of the cylinder body is arranged in the first evaporation chamber, the other end of the cylinder body is arranged in the second evaporation chamber, a piston is arranged in the cylinder body, evaporation media are arranged in spaces on two sides of the piston in the cylinder body, a permanent magnet is embedded in the piston, and a coil which forms a closed circuit with a storage battery is wound on the periphery of the cylinder body; the smoke outlet of the main pipeline is communicated with the first evaporation chamber and the second evaporation chamber through a two-position three-way reversing valve I, and contact switches for controlling the reversing of the two-position three-way reversing valve I are arranged at two ends in the cylinder body.
In the seventh preferred scheme, the two-position three-way reversing valve I is provided with two switching positions, when the two-position three-way reversing valve I is in the first switching position, the two-position three-way reversing valve I communicates the main pipeline with the first evaporation chamber, and the flue gas enters the first evaporation chamber, so that the evaporation medium at the left end of the cylinder body is evaporated, and the piston is pushed to move towards the right end to be contacted with the contact switch at the right end; the two-position three-way reversing valve I is switched to a second switching position, the two-position three-way reversing valve I enables the main pipeline to be communicated with the second evaporation chamber, the first evaporation chamber is cooled gradually, the evaporation medium in the left end of the cylinder body is cooled gradually, the evaporation medium at the right end of the cylinder body is evaporated, and therefore the piston moves towards the left end of the cylinder body again, and the piston slides in the cylinder body in a reciprocating mode. The piston reciprocates in the cylinder body, and the current that forms in the coil will be stored in the battery to the stand-by power as draught fan operation.
The preferable scheme is eight: as a further optimization of the preferred scheme seven, the electric energy conversion device comprises an auxiliary smoke exhaust pipe, the auxiliary smoke exhaust pipe comprises an inlet section, a throat section and an outlet section, and the cross sectional areas of the inlet section and the outlet section are larger than that of the throat section; the first evaporation chamber and the second evaporation chamber are communicated with the inlet section of the auxiliary smoke exhaust pipe through the two-position three-way reversing valve II, the top parts of the first evaporation chamber and the second evaporation chamber are provided with air inlets communicated with the outside, the inner walls of the first evaporation chamber and the second evaporation chamber are provided with double metal sheets capable of sealing the air inlets, and the throat part of the auxiliary smoke exhaust pipe is communicated with the bottoms of the first evaporation chamber and the second evaporation chamber through a communicating pipe.
In the preferred scheme eight, the auxiliary smoke exhaust pipe forms a venturi tube structure, and the flow speed of smoke passing through the throat part is accelerated, so that the pressure of the throat part is reduced; the throat part sucks the air in the evaporation chamber through the communicating pipe, and the temperature in the evaporation chamber is gradually reduced when the smoke does not pass through the evaporation chamber; and because the bimetallic strip will be bent when the temperature rises, the air inlet is sealed; as the temperature decreases, the bimetal returns to its original shape, and thus the air inlet communicates the evaporation chamber with the outside, so that cool air enters the evaporation chamber through the air inlet, further promoting cooling of the evaporation chamber.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
fig. 2 is a schematic diagram of an electric energy conversion device according to a second embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a flue gas recovery chamber 10, a circulation chamber 11, a mixing chamber 12, a heat pump surface air cooler 13, an induced draft fan 14, an exhaust air adjusting air valve 15, a second electric adjusting air valve 16, a first electric adjusting air valve 17, a main pipeline 20, a second flue gas adjusting air valve 21, a waste heat recovery flue 30, a flue gas recovery port 31, a first flue gas adjusting air valve 32, a first evaporation chamber 41, a second evaporation chamber 42, an air inlet 43, a bimetallic strip 44, a cylinder body 50, a piston 51, a coil 52, a two-position three-way reversing valve I61, a two-position three-way reversing valve II62, an auxiliary smoke exhaust pipe 70, a throat 71 and a communicating pipe 72.
The first embodiment is as follows:
as shown in fig. 1, the intelligent waste heat recovery system comprises a smoke exhaust pipeline, a smoke receiving device and an air heat pump unit. The smoke exhaust pipeline comprises a main pipeline 20 and a waste heat recovery flue 30, a second smoke adjusting valve is arranged in the main pipeline 20, one end of the waste heat recovery flue 30 is arranged below the second smoke adjusting valve and communicated with the main pipeline 20, the other end of the waste heat recovery flue 30 is a smoke recovery port 31, smoke entering the waste heat recovery flue 30 is discharged through the smoke recovery port 31, and a first smoke adjusting air valve 32 is arranged in the smoke recovery port 31. The exhaust proportion of the flue gas through the main pipeline 20 and the waste heat recovery flue 30 can be changed by adjusting the opening degrees of the first flue gas adjusting air valve 32 and the second flue gas adjusting air valve 21; for example, by increasing the opening degree of the first flue gas adjusting damper 32 and decreasing the opening degree of the second flue gas adjusting damper 21, the amount of flue gas discharged from the waste heat recovery flue 30 can be increased and the amount of flue gas discharged from the main pipe 20 can be decreased.
The flue gas recovery device comprises a flue gas recovery chamber 10, a heat pump surface air cooler 13 and an induced draft fan 14, wherein the flue gas recovery chamber 10 comprises a mixing chamber 12 and a circulating chamber 11, the heat pump surface air cooler 13 is arranged in the mixing chamber 12, and the induced draft fan 14 is arranged at the top of the mixing chamber 12. The circulating chamber 11 surrounds the circumference and the top of the mixing chamber 12, and the bottom of the mixing chamber 12 is provided with a flue gas inlet which communicates the mixing chamber 12 with the outside; an annular baffle is arranged on the bottom surface of the flue gas recovery chamber 10 to surround the flue gas inlet. In addition, the flue gas recovery port 31 of the waste heat recovery flue 30 extends to the annular baffle plate, so that the flue gas recovery port 31 is opposite to the flue gas inlet, and the annular baffle plate has the function of gathering the flue gas.
And a circulating air port for communicating the circulating chamber 11 with the mixing chamber 12 is arranged on the side surface of the mixing chamber 12, and the flue gas inlet, the circulating air port, the heat pump surface cooler 13 and the induced draft fan 14 are sequentially arranged from bottom to top. When the induced draft fan 14 works, airflow flowing from bottom to top is formed; that is, the air inlet of the induced draft fan 14 extends into the mixing chamber 12, and the air outlet of the induced draft fan 14 is arranged at the top of the circulating chamber 11, so that the air outlet of the induced draft fan 14 is communicated with the circulating chamber 11. An air outlet which can be communicated with the outside and the circulating chamber 11 is arranged on the top of the flue gas recovery chamber 10, the air outlet is opposite to an air outlet of the induced draft fan 14, and an air exhaust adjusting air valve 15 is arranged at the air outlet; in addition, a first electric adjusting air valve 17 and a second electric adjusting air valve 16 are respectively arranged at the smoke inlet and the circulating air inlet.
The flue gas recovery device also comprises a temperature control module, the temperature control module comprises a controller, a first temperature sensor arranged in the mixing chamber 12 and a second temperature sensor arranged at the air outlet, and the first temperature sensor and the second temperature sensor are both electrically connected with the controller. In addition, the first flue gas adjusting air valve 32, the second flue gas adjusting air valve 21, the first electric adjusting air valve 17, the second electric adjusting air valve 16 and the exhaust air adjusting air valve 15 are all electric valves, and the first flue gas adjusting air valve 32, the second flue gas adjusting air valve 21, the first electric adjusting air valve 17, the second electric adjusting air valve 16 and the exhaust air adjusting air valve 15 are all electrically connected with the controller.
The induced draft fan 14 in the flue gas recovery chamber 10 works, so that the air current flows in the mixing chamber 12 in sequence along the flue gas inlet, the heat pump surface cooler 13 and the induced draft fan 14, the flue gas recovery port 31 is opposite to the flue gas inlet, and a large amount of flue gas is concentrated at the flue gas inlet after being discharged from the flue gas recovery port 31, so that the flue gas and the air enter the mixing chamber 12, the air is mixed with the flue gas, and the temperature of the flue gas is reduced.
The air heat pump unit adopts a traditional unit, only an evaporator of the air heat pump unit is replaced by a heat pump surface air cooler 13, and the heat pump surface air cooler 13 also adopts an existing surface air cooler. The refrigerant of the air heat pump unit enters the condenser for heat exchange after being compressed by the compressor, and then enters the heat pump surface air cooler 13 for evaporation and then returns to the compressor, so that the refrigerant circulates in the air heat pump unit. The heat pump surface air cooler 13 arranged in the flue gas recovery chamber 10 replaces an evaporator of an air heat pump unit, the flue gas recovery chamber 10 is mixed with flue gas through air quantity regulation, and the temperature in the flue gas recovery chamber 10 is controlled at the optimal working temperature of the air heat pump unit.
Because the air outlet is opposite to the air outlet of the induced draft fan 14, the air flow discharged from the induced draft fan 14 can be discharged from the air outlet; the amount of the air flow discharged from the air outlet of the induced draft fan 14 can be limited by changing the opening degree of the air exhaust adjusting air valve 15; another portion of the air flow discharged from the induced draft fan 14 will enter the circulation chamber 11 and enter the mixing chamber 12 through the circulation tuyere. Therefore, when the temperature of the airflow discharged from the air outlet of the induced draft fan 14 is high, the controller adjusts the opening degree of the air exhaust adjusting air valve 15 by turning small, so that the airflow enters the mixing chamber 12 again, and the heat of the airflow is repeatedly absorbed by the heat pump surface air cooler 13, so that the exhaust gas temperature can be reduced.
When the temperature in the mixing chamber 12 is higher than the preset value, the controller firstly controls the opening of the first electric adjusting air valve 17 to increase, and as the flue gas is gathered around the flue gas recovery port 31 and the ambient air is exhausted, the flue gas is firstly sucked into the flue gas inlet, so that the air suction amount can be increased by increasing the opening of the flue gas inlet, and the temperature in the mixing chamber 12 is reduced; and when the opening degree of the first electric adjusting air valve 17 is increased to the maximum value and the temperature in the mixing chamber 12 is still higher than the preset value, the opening degree of the first smoke adjusting air valve 32 is controlled to be reduced so as to reduce the smoke amount. When the controller controls the first electrically controlled damper 17 to operate, the controller also controls the second electrically controlled damper 16 to operate simultaneously, that is, the opening degree of the first electrically controlled damper 17 decreases and the opening degree of the second electrically controlled damper 16 decreases synchronously, or vice versa.
When the temperature in the mixing chamber 12 is lower than the preset value, the controller firstly controls the opening degree of the first electric adjusting air valve 17 to be reduced, and the suction amount of air is reduced because the smoke inlet firstly sucks smoke, so that the temperature in the mixing chamber 12 is increased; if the opening of the first electric adjusting air valve 17 is reduced to the minimum value and the temperature in the mixing chamber 12 is still less than the preset value, the controller controls the opening of the first flue gas adjusting air valve 32 to be increased. Therefore, the flue gas heat can be fully utilized, and the flue gas supply is reasonably allocated according to the heat supply requirement of the air heat pump unit.
Example two:
the difference between the second embodiment and the first embodiment is that:
as shown in fig. 2, in the second embodiment, an electric energy conversion device is disposed at the end of the main pipe 20 of the smoke exhaust pipe. The electric energy conversion device includes a battery, a first evaporation chamber 41, a second evaporation chamber 42, and a cylinder 50.
One end of the cylinder 50 is disposed in the first evaporation chamber 41, and the other end of the cylinder 50 is disposed in the second evaporation chamber 42. A piston 51 is provided in the cylinder 50, and the piston 51 is reciprocally slidable in the cylinder 50 in the axial direction of the cylinder 50. Evaporation media are arranged in the spaces at two sides of the piston 51 in the cylinder 50, and in the embodiment, carbon tetrachloride is adopted for evaporation stop; when one end of the cylinder 50 is in a high temperature environment and the other end of the cylinder 50 is in a low temperature environment, the evaporation medium at the high temperature end evaporates into a gas state, and the evaporation medium at the low temperature end condenses into a liquid state, so the piston 51 slides to the low temperature end; if the high temperature environment and the low temperature environment at both ends of the cylinder 50 are switched, the state of the evaporation medium at both ends of the cylinder 50 is also changed, and the piston 51 is also slid to the other side. The temperature of the first evaporation chamber 41 and the temperature of the second evaporation chamber 42 are switched continuously, and the piston 51 reciprocates in the cylinder 50, while the first evaporation chamber 41 is in a high temperature environment and the second evaporation chamber 42 is in a low temperature environment.
A permanent magnet is embedded in the piston 51, a coil 52 forming a closed circuit with the battery is wound on the periphery of the cylinder 50, the piston 51 reciprocates in the cylinder 50, and the current formed in the coil 52 is stored in the battery to serve as backup power for the operation of the induced draft fan 14.
The two-position three-way reversing valve I61 is arranged in the main pipeline 20, the smoke outlet of the main pipeline 20 is communicated with the first evaporation chamber 41 and the second evaporation chamber 42 through the two-position three-way reversing valve I61, contact switches for controlling the reversing of the two-position three-way reversing valve I61 are arranged at two ends in the cylinder body 50, and when the piston 51 is in contact with one of the contact switches at two ends of the cylinder body 50, the two-position three-way reversing valve I61 is switched. Namely, when the two-position three-way reversing valve I61 is at the first switching position, the two-position three-way reversing valve I61 communicates the main pipeline 20 with the first evaporation chamber 41, and the flue gas enters the first evaporation chamber 41, so that the evaporation medium at the left end of the cylinder body 50 is evaporated, and the piston 51 is pushed to move to the right end to be contacted with the contact switch at the right end; when the two-position three-way directional valve I61 is switched to the second switching position, the two-position three-way directional valve I61 connects the main pipe 20 with the second evaporation chamber 42, the first evaporation chamber 41 is gradually cooled, the evaporation medium in the left end of the cylinder 50 is gradually cooled, and the evaporation medium at the right end of the cylinder 50 is evaporated, so that the piston 51 moves to the left end of the cylinder 50 again.
An auxiliary smoke exhaust pipe 70 is arranged at the top of the first evaporation chamber 41 and the second evaporation chamber 42, the auxiliary smoke exhaust pipe 70 comprises an inlet section, a throat section 71 and an outlet section, and the cross sectional area of the inlet section and the cross sectional area of the outlet section are larger than that of the throat section 71. The first evaporation chamber 41 and the second evaporation chamber 42 are both communicated with the auxiliary smoke exhaust pipe 70 through a two-position three-way reversing valve II 62; specifically, two interfaces of the two-position three-way reversing valve II62 are respectively communicated with the first evaporation chamber 41 and the second evaporation chamber 42, and the other interface of the two-position three-way reversing valve II62 is communicated with the inlet section of the auxiliary smoke exhaust pipe 70. In addition, the two-position three-way reversing valve II62 and the two-position three-way reversing valve I61 act simultaneously; namely, when the two-position three-way reversing valve I61 is in the first switching position so that the main pipeline 20 is communicated with the first evaporation chamber 41, the two-position three-way reversing valve II62 is used for communicating the first evaporation chamber 41 with the inlet section of the auxiliary smoke exhaust pipe 70; when the two-position three-way reversing valve I61 is in the second switching position, so that the main pipeline 20 is communicated with the second evaporation chamber 42, the two-position three-way reversing valve II62 is communicated with the second evaporation chamber 42 and the inlet section of the auxiliary smoke exhaust pipe 70.
The top of the first evaporation chamber 41 and the second evaporation chamber 42 is provided with an air inlet 43 communicated with the outside, and the inner walls of the first evaporation chamber 41 and the second evaporation chamber 42 are provided with a bimetallic strip 44 capable of sealing the air inlet 43; specifically, one end of the bimetal 44 is fixed on the sidewall of the evaporation chamber, and the other end of the bimetal 44 is provided with a plug for closing the air inlet 43. When the temperature in the evaporation chamber rises, the bimetallic strip 44 will be heated and bent, so that the plug moves towards the air inlet 43 and plugs the air inlet 43; when the temperature of the evaporation chamber is lowered, the bimetal 44 is restored, and the air inlet 43 communicates the evaporation chamber with the outside. The throat 71 of the auxiliary smoke exhaust pipe 70 is communicated with the bottoms of the first evaporation chamber 41 and the second evaporation chamber 42 through a communicating pipe 72; when the smoke is discharged through the first evaporation chamber 41, the temperature of the second evaporation chamber 42 is gradually decreased to make the second evaporation chamber 42 communicate with the outside through the air inlet 43, and the throat 71 forms a negative pressure to suck the air in the second evaporation chamber 42 through the communication pipe 72 at this time, and then the outside air enters the second evaporation chamber 42 through the air inlet 43 and passes through the right end of the cylinder 50 from the top to the bottom, thereby condensing the evaporation medium inside the right end of the cylinder 50. In addition, the bimetallic strip 44 is arranged at the top of the evaporation chamber, which is beneficial for the flue gas to be in full contact with the bimetallic strip 44, so that the bimetallic strip 44 is deformed by heating.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. Waste heat intelligence recovery system, its characterized in that: comprises a smoke exhaust pipeline, a smoke receiving device and an air heat pump unit; a smoke recovery port is arranged on the smoke exhaust pipeline, and a first smoke adjusting air valve is arranged in the smoke recovery port;
the flue gas recovery device comprises a flue gas recovery chamber, a heat pump surface air cooler and an induced draft fan, wherein the heat pump surface air cooler and the induced draft fan are arranged in the flue gas recovery chamber; the side wall of the flue gas recovery chamber is provided with an air outlet which can be communicated with the outside and the circulation chamber, the air outlet is opposite to an air outlet of the induced draft fan, and the air outlet is provided with an air exhaust adjusting air valve;
the flue gas recovery device comprises a temperature control module, the temperature control module comprises a controller and a first temperature sensor arranged in the mixing chamber, and the first temperature sensor is electrically connected with the controller; the first flue gas adjusting air valve is an electric valve and is electrically connected with the controller, a first electric adjusting air valve is arranged at the flue gas inlet and is electrically connected with the controller, the smoke exhaust pipeline comprises a main pipeline and a waste heat recovery flue, a second flue gas adjusting valve electrically connected with the controller is arranged in the main pipeline, one end of the waste heat recovery flue is arranged below the second flue gas adjusting valve and is communicated with the main pipeline, a flue gas recovery port is arranged at the other end of the waste heat recovery flue, an annular baffle plate is arranged on the bottom surface of the flue gas recovery chamber and surrounds the flue gas inlet, and the flue gas recovery port of the waste heat recovery flue extends to the annular baffle plate;
when the temperature in the mixing chamber is higher than a preset value, the controller firstly controls the opening of the first electric adjusting air valve to increase, and when the opening of the first electric adjusting air valve is increased to the maximum value and the temperature in the mixing chamber is still higher than the preset value, the opening of the first flue gas adjusting air valve is controlled to decrease; when the temperature in the mixing chamber is lower than a preset value, the controller firstly controls the opening degree of the first electric adjusting air valve to be reduced, if the opening degree of the first electric adjusting air valve is reduced to the minimum value, the temperature in the mixing chamber is still smaller than the preset value, and then the controller controls the opening degree of the first flue gas adjusting air valve to be increased;
the refrigerant of the air heat pump unit enters the condenser for heat exchange after being compressed by the compressor, and then enters the heat pump surface air cooler for evaporation and then returns to the compressor.
2. The intelligent waste heat recovery system of claim 1, wherein: and a second electric adjusting air valve is arranged at the circulating air port and is electrically connected with the controller.
3. The intelligent waste heat recovery system of claim 2, wherein: a second temperature sensor is arranged at the air outlet and electrically connected with the controller; the air exhaust adjusting air valve is an electric valve and is electrically connected with the controller.
4. The intelligent waste heat recovery system of claim 3, wherein: the air outlet is arranged at the top of the flue gas recovery chamber, and the flue gas inlet is arranged at the bottom of the flue gas recovery chamber; flue gas inlet, circulation wind gap, heat pump surface cooler, draught fan and air exit set gradually from supreme down.
5. The intelligent waste heat recovery system of claim 4, wherein: the top of the main pipeline is provided with an electric energy conversion device, the electric energy conversion device comprises a storage battery, a first evaporation chamber, a second evaporation chamber and a cylinder body, and the storage battery is electrically connected with an induced draft fan; one end of the cylinder body is arranged in the first evaporation chamber, the other end of the cylinder body is arranged in the second evaporation chamber, a piston is arranged in the cylinder body, evaporation media are arranged in spaces on two sides of the piston in the cylinder body, a permanent magnet is embedded in the piston, and a coil which forms a closed circuit with a storage battery is wound on the periphery of the cylinder body; the smoke outlet of the main pipeline is communicated with the first evaporation chamber and the second evaporation chamber through a two-position three-way reversing valve I, and contact switches for controlling the reversing of the two-position three-way reversing valve I are arranged at two ends in the cylinder body.
6. The intelligent waste heat recovery system of claim 5, wherein: the electric energy conversion device comprises an auxiliary smoke exhaust pipe, the auxiliary smoke exhaust pipe comprises an inlet section, a throat part and an outlet section, and the cross sectional areas of the inlet section and the outlet section are larger than that of the throat part; the first evaporation chamber and the second evaporation chamber are communicated with the inlet section of the auxiliary smoke exhaust pipe through the two-position three-way reversing valve II, the top parts of the first evaporation chamber and the second evaporation chamber are provided with air inlets communicated with the outside, the inner walls of the first evaporation chamber and the second evaporation chamber are provided with double metal sheets capable of sealing the air inlets, and the throat part of the auxiliary smoke exhaust pipe is communicated with the bottoms of the first evaporation chamber and the second evaporation chamber through a communicating pipe.
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| CN202010053976.0A CN111207408B (en) | 2020-01-17 | 2020-01-17 | Intelligent waste heat recovery system |
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| CN202010053976.0A CN111207408B (en) | 2020-01-17 | 2020-01-17 | Intelligent waste heat recovery system |
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| CN111207408B true CN111207408B (en) | 2022-04-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008074990A1 (en) * | 2006-12-16 | 2008-06-26 | Star Refrigeration Limited | Air-source heat pump |
| CN101769594A (en) * | 2008-12-29 | 2010-07-07 | 苏桐梅 | Flue gas total-heat recovery device of gas boiler |
| CN203257617U (en) * | 2013-03-11 | 2013-10-30 | 梁慧勤 | Solar heat pump |
| CN207763293U (en) * | 2017-12-15 | 2018-08-24 | 广州德能热源设备有限公司 | Fuel gas heat recycling device and heat pump unit |
| CN110173751A (en) * | 2019-06-11 | 2019-08-27 | 山东省食品发酵工业研究设计院 | A kind of total heat recovery type integrated gas heat pump heat supply unit and its application |
-
2020
- 2020-01-17 CN CN202010053976.0A patent/CN111207408B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008074990A1 (en) * | 2006-12-16 | 2008-06-26 | Star Refrigeration Limited | Air-source heat pump |
| CN101769594A (en) * | 2008-12-29 | 2010-07-07 | 苏桐梅 | Flue gas total-heat recovery device of gas boiler |
| CN203257617U (en) * | 2013-03-11 | 2013-10-30 | 梁慧勤 | Solar heat pump |
| CN207763293U (en) * | 2017-12-15 | 2018-08-24 | 广州德能热源设备有限公司 | Fuel gas heat recycling device and heat pump unit |
| CN110173751A (en) * | 2019-06-11 | 2019-08-27 | 山东省食品发酵工业研究设计院 | A kind of total heat recovery type integrated gas heat pump heat supply unit and its application |
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| CN111207408A (en) | 2020-05-29 |
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