CN210242519U

CN210242519U - Waste heat power generation system

Info

Publication number: CN210242519U
Application number: CN201920641974.6U
Authority: CN
Inventors: Fan Yang; 杨帆; Ji Pu; 蒲吉
Original assignee: Chongqing Yanyu Energy Saving Technology Co ltd
Current assignee: Chongqing Yanyu Energy Saving Technology Co ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-04-03
Anticipated expiration: 2029-04-30

Abstract

The utility model belongs to the field of energy-saving heat exchange, and particularly discloses a waste heat power generation system, which comprises a heat absorption assembly, a Stirling generator and a circulating pump for driving a heat exchange medium to circulate; the heat absorption assembly comprises a heat exchange cylinder, a cooling channel for heat exchange medium circulation is arranged in the heat exchange cylinder, and a top cover for covering the heat exchange cylinder is arranged on at least one end face of the heat exchange cylinder; a conical flow guide part is arranged on one surface of the top cover, which is contacted with the heat exchange cylinder; the cooling channel and the circulating pump are communicated end to end through a pipeline to form a closed circulating passage, and a heat exchange assembly in contact with the heat absorption end of the Stirling generator is arranged on the pipeline. Adopt the utility model discloses a scheme can reach waste heat recovery's purpose.

Description

Waste heat power generation system

Technical Field

The utility model belongs to energy-conserving heat transfer field, concretely relates to waste heat power generation system.

Background

The waste heat refers to heat energy which is generated by various heat energy conversion devices, energy utilization devices, chemical reaction devices and high-temperature workpieces and is not utilized in the production process. A large amount of waste heat exists in the industrial fields of textile printing and dyeing, electroplating processing, chemical pharmacy, printing and drying, coal slime drying, casting, electrolytic aluminum production and the like, and the waste heat is directly wasted. If the energy can be fully utilized by recovery, the industrial energy loss can be greatly reduced, and meanwhile, the waste heat recovery and utilization is an important way for improving the economy and saving the fuel.

Based on the problems, the waste heat power generation system is developed by the department, power is generated by utilizing waste heat, the waste heat utilization rate is improved, and energy waste is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waste heat power generation system to reach waste heat recovery's purpose.

In order to achieve the above purpose, the basic scheme of the utility model is as follows: the waste heat power generation system comprises a heat absorption assembly, a Stirling generator and a circulating pump for driving a heat exchange medium to circulate; the heat absorption assembly comprises a heat exchange cylinder, the heat exchange cylinder comprises a placing cavity for placing a high-temperature workpiece and a cooling channel for supplying heat exchange medium for circulation, and at least one end face of the heat exchange cylinder is provided with a top cover for covering the heat exchange cylinder; the cooling channel and the circulating pump are communicated end to end through a pipeline to form a closed circulating passage, and a heat exchange assembly used for providing heat to a heat absorption end of the Stirling generator is arranged on the pipeline.

The theory of operation and the beneficial effect of this basic scheme lie in:

1. in the scheme, the top cover is arranged on at least one end face of the heat exchange cylinder, and when the heat exchange cylinder is transversely placed, the top covers are required to be arranged at two ends of the heat exchange cylinder; when the heat exchange cylinder is vertically placed, the lower end of the heat exchange cylinder can abut against the ground to form a seal, and only a top cover needs to be arranged at the upper end of the heat exchange cylinder; in conclusion, the purpose of arranging the top cover is to enable the interior of the heat exchange cylinder to be sealed as much as possible, reduce the heat loss and improve the waste heat recovery rate.

2. Through the contact of the heat absorption end of the heat exchange assembly and the Stirling generator, when the heat exchange medium absorbs heat and then circulates in the pipeline, the heat is transferred to the heat absorption end of the Stirling generator when the heat is brought to the heat exchange assembly, and the Stirling generator can be used for generating power after absorbing the heat, so that the utilization of waste heat is realized.

Further, still communicate in the circulation route and assist the thermal subassembly, assist the thermal subassembly and set up between stirling generator and heat absorption subassembly, assist and be provided with temperature sensitive sensor between thermal subassembly and the heat absorption subassembly, temperature sensitive sensor electricity is connected with the controller, and temperature sensitive sensor, controller are connected with assisting the thermal subassembly electricity, and the controller is used for controlling the opening and close of assisting the thermal subassembly.

Has the advantages that: through the heat transfer, the temperature of the high temperature work piece in the heat absorption subassembly can reduce gradually to lead to the temperature reduction of heat exchange medium, the temperature of heat exchange medium is difficult to make stirling generator continue to work, and the heat of this part can't continue to be used for the electricity generation, wastes easily.

Through the arrangement of the scheme, when the temperature-sensitive sensor detects that the temperature is reduced to a temperature lower than the working temperature of the Stirling generator, the temperature-sensitive sensor sends a working signal to the auxiliary heating assembly, and the auxiliary heating assembly heats the heat exchange medium, so that the temperature of the heat exchange medium is increased to the working temperature of the Stirling generator.

Further, a liquid storage tank is communicated with the inside of the circulation passage and is arranged between the pump assembly and the Stirling generator.

Has the advantages that: in the circulation process of the heat exchange medium, the liquid storage tank is equivalent to the transfer position of the heat exchange medium, and a large amount of heat exchange medium stays in the liquid storage tank, so that the quantity of the heat exchange medium participating in circulation is increased. Simultaneously, after stopping the heat transfer, a large amount of heat exchange medium can be stored in the liquid reserve tank, when heat exchange medium appears the error in the circulation in-process, also makes things convenient for the workman to overhaul through the liquid reserve tank, and need not dismantle the pipeline and overhaul.

Further, the heat exchange cylinder is vertically arranged and comprises an inner cylinder and an outer cylinder fixed outside the inner cylinder, the inner cylinder is a placing cavity, and a cooling channel is formed between the inner cylinder and the outer cylinder; the top cover is arranged on the upper end surface of the heat exchange cylinder, and an inverted cone-shaped bulge is arranged on one surface of the top cover, which is in contact with the heat exchange cylinder.

Has the advantages that: the heat exchange cylinder is vertically arranged, so that the occupied area is reduced, and meanwhile, one top cover can be omitted, so that the processing cost is reduced. The heat exchange medium is between inner tube and urceolus, and high temperature work piece or other high temperature article are placed in the inner tube, carry out the heat transfer cooling with the heat exchange medium, and when steam was excessive to being close to the motion of top cap direction, the guide that receives toper water conservancy diversion portion moved to being close to inner tube inner wall direction, and then fast and the heat exchange medium exchange heat between inner tube, the urceolus, reduces the heat through the volume of top cap and external heat transfer, further improves waste heat recovery rate.

Further, be equipped with the cavity in the top cap, the open setting in top of cavity, and the top of cavity is equipped with the detachable apron, and the cavity intussuseption is filled with insulation material.

Has the advantages that: because the thermal conductivity of the gas is smaller than that of the solid, the arrangement of the cavity can play a certain heat insulation role and reduce the heat exchange amount between the hot gas flow and the outside. The thermal insulation material is added, so that the thermal insulation effect on hot air flow can be further improved, and meanwhile, the cover plate can be detachably connected, so that the operator can conveniently take and place the thermal insulation material in the cavity.

Furthermore, a groove is arranged on the outer wall of the inner cylinder, a heat absorption pipe for heat supply exchange medium to flow is arranged in the groove, and a plurality of heat dissipation holes communicated with the groove are formed in the inner wall of the inner cylinder.

Has the advantages that: the setting of recess is convenient for on the one hand to the location of heat-absorbing pipe, and the distance of the inside hot gas flow of on the other hand recess can also further be reduced to the setting of on the other hand recess, improves the effect of heat transfer. And hot air flow can directly enter the groove from the heat dissipation holes, so that the hot air flow can directly contact the heat absorption pipe, and the heat exchange effect of the heat exchange medium is further improved.

Further, the bottom of top cap is equipped with a plurality of heat conduction units along protruding equipartition, and the heat conduction unit includes heat-conducting plate and the actuating mechanism that drives the heat-conducting plate around the reciprocal swing of horizontal axis, the heat-conducting plate is located between arch and the inner tube, be fixed with a plurality of gasbags between heat-conducting plate and the arch, be equipped with the check valve that admits air on the gasbag, be equipped with the exhaust hole of intercommunication gasbag on the heat-conducting plate, be equipped with the check valve of giving vent to.

Has the advantages that: because the hot gas flow is along the in-process that the arch periphery flows, partial heat exchanges with the outside air through the top cap, consequently the setting of heat conduction unit can improve the speed that the hot gas flow flows to the section of thick bamboo wall flow of inner tube, and then improves waste heat recovery's effect.

The working process of the heat conduction unit is as follows: the heat-conducting plate is at reciprocal wobbling in-process for the continuous inflation of gasbag is with dwindling, and when the gasbag volume reduced, its inside atmospheric pressure increased, the check valve that gives vent to anger opened, and the inside steam of gasbag is discharged through the exhaust hole, therefore the gasbag combustion gas stream can lead to the fact the effect of buffering to the hot gas stream that is close to the top cap, slows down the speed that the hot gas stream rises, reduces the hot gas stream and flows through the probability of top cap with external heat transfer, thereby improves the recovery effect of waste heat.

Furthermore, the vent hole is obliquely arranged, and an outlet at one side far away from the air bag faces downwards.

Has the advantages that: the air flow discharged by the air bag faces downwards, and provides downward impact force to the hot air flow close to the top cover, so that the buffer force generated by the hot air flow is improved, and the rising rate of the hot air flow is further slowed down.

Furthermore, the heat exchange assembly comprises a heat exchange box which is fixed on the pipeline and communicated with the pipeline, the heat absorption end of the Stirling generator is inserted into the heat exchange box, and a sealing piece which is positioned at the joint of the heat exchange box and the Stirling generator is arranged on the heat exchange box.

Has the advantages that: the heat absorption end of the Stirling generator directly contacts with a heat exchange medium in the heat exchange box, so that the heat absorption efficiency is improved, and the sealing element is arranged to prevent the heat exchange medium from leaking through the heat exchange box.

Furthermore, a plurality of metal supporting tubes communicated with the heat absorbing tubes are distributed on the lower part of the inner cylinder in a staggered manner; the lower end of the heat exchange cylinder is horizontally connected with a slag collecting box in a sliding way.

Has the advantages that: when the high-temperature workpiece is placed on the supporting tube, a small amount of collision is generated between the high-temperature workpiece and the supporting tube, and a certain amount of broken carbon residues and the like are attached to certain workpieces, such as prebaked electrodes of electrolytic aluminum, and the broken carbon residues on the workpieces fall off due to collision vibration when the workpieces are placed on the supporting tube, and the broken carbon residues can be collected by the aid of the material receiving plate.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a perspective view of a heat exchange cartridge in an embodiment of the present invention;

FIG. 3 is a schematic view of a front partial cut-away of an embodiment of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

FIG. 5 is a sectional view of the top cover in the first embodiment;

FIG. 6 is a schematic view of a partial cross-section of the top cover in the second embodiment.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the heat exchange device comprises a heat exchange cylinder 100, an inner cylinder 101, an outer cylinder 102, a groove 103, heat dissipation holes 104, a heat absorption pipe 105, mounting holes 106, a hoop 107, mounting lugs 108, a support pipe 109, a slag collecting box 110, a top cover 200, protrusions 201, a cavity 202, a cover plate 203, a heat conducting plate 300, a speed reducing motor 301, a guide rod 302, a bearing seat 303, an incomplete gear 304, an end face gear 305, an air bag 306, an exhaust hole 307, an air outlet one-way valve 308, a circulating pump 400, a liquid storage box 401, a heat exchange box 402, a heater 403 and a temperature-sensitive.

Example one

As shown in fig. 1, the waste heat power generation system includes a heat absorption assembly, a heat exchange assembly, an auxiliary heat assembly, a stirling generator, a liquid storage tank 401 and a circulation pump 400, two heat absorption assemblies are used as an example in the present application for explanation, and in an actual production process, one or more heat absorption assemblies can be arranged according to requirements.

The heat absorbing component comprises a heat exchange cylinder 100 which is vertically arranged, as shown in a combined figure 2, the heat exchange cylinder 100 comprises an inner cylinder 101 and an outer cylinder 102 which is fixed outside the inner cylinder 101, the inner cylinder 101 and the outer cylinder 102 are coaxially arranged, and a cooling channel for heat exchange medium circulation is formed between the inner cylinder 101 and the outer cylinder 102. The upper end and the lower end of the cooling channel are both closed.

Referring to fig. 5, the top of the heat exchanging cylinder 100 is covered with a top cover 200, in this embodiment, the top cover 200 is circular, the outer diameter of the top cover 200 is larger than the outer diameter of the heat exchanging cylinder 100, and the top cover 200 is directly placed on the upper end of the heat exchanging cylinder 100 when the top cover is covered. The center department of top cap 200 bottom is fixed with the arch 201 that is the back taper, is equipped with the open cavity in top 202 in top cap 200, and cavity 202 is the back taper equally, can dismantle on top cap 200 to be connected with the apron 203 that seals cavity 202 upper portion, specifically sets up to: the cover plate 203 is provided with a positioning hole I, the top cover 200 is provided with a threaded hole I corresponding to the positioning hole I, bolts are installed in the positioning hole I and the threaded hole I to realize the installation of the cover plate 203 on the top cover 200, when the heat insulation cover is used, a heat insulation material is filled in the cavity 202, and in the embodiment, the heat insulation material is glass wool; a lifting lug convenient for lifting the crane is further arranged on the top cover 200.

Referring to fig. 3, a spiral groove 103 is formed in an outer wall of the inner cylinder 101, a cross section of the groove 103 is semicircular, a plurality of heat dissipation holes 104 corresponding to and communicating with the groove 103 are formed in a sidewall of the inner cylinder 101, that is, a line connecting centers of the plurality of heat dissipation holes 104 is a spiral curve consistent with a path of the groove 103, and the heat dissipation holes 104 are all through holes. A heat absorption pipe 105 for heat exchange medium circulation is clamped in the groove 103, and mounting holes 106 for the heat absorption pipe 105 to pass through are formed in the upper part and the lower part of the outer cylinder 102. A plurality of stainless steel supporting tubes 109 communicated with the heat absorbing tube 105 are distributed at the lower part of the inner tube 101 in a staggered way; the lower end of the heat exchange cylinder 100 is horizontally connected with a slag collecting box 110 in a sliding manner.

Referring to fig. 4, a plurality of locking mechanisms for fixing the heat absorbing pipes 105 are arranged on the outer wall of the inner cylinder 101, wherein each locking mechanism comprises a semi-annular hoop 107 and a bolt, two ends of the hoop 107 are bent outwards (towards one side of a protrusion 201 of the hoop 107) to form a mounting lug 108, a positioning hole ii is formed in the mounting lug 108, a group of threaded holes ii corresponding to the positioning holes are formed in the outer wall of the inner cylinder 101, two threaded holes ii in the group of threaded holes ii are respectively located on the upper side and the lower side of the groove 103, and the bolts are installed in the positioning holes ii and the threaded holes ii, so that the hoop 107 can be fixed outside the heat absorbing pipes 105.

The heat exchange assembly comprises a heat exchange box 402, wherein a jack for inserting the heat absorption end of the Stirling generator is formed in the heat exchange box 402, a sealing element is fixed in the jack, and a graphite packing is selected as the sealing element in the embodiment.

The auxiliary heating assembly comprises a heating box and a heater 403 fixed on the heating box, wherein the type of the heater 403 is as follows: DN125X800, a temperature-sensitive sensor 404 is arranged between the auxiliary heating component and the heat absorption component, and the model of the temperature-sensitive sensor 404 is as follows: the SIN-WZP-PT100 and the temperature-sensitive sensor 404 are electrically connected with a controller arranged on the heater 403, and the controller is of the type: 900U, the controller is electrically connected with the heater 403, and the controller is used for controlling the on-off of the heater 403.

The liquid inlet ends of the heat absorbing pipes 105 in the two groups of heat absorbing assemblies are all communicated with a liquid inlet header pipe, the liquid outlet ends of the heat absorbing pipes 105 in the two groups of heat absorbing assemblies are all communicated with a liquid outlet header pipe, the auxiliary heating assembly, the heat exchange assembly, the liquid storage tank 401, the mechanical pump and the liquid inlet header pipe are sequentially communicated end to end through pipelines, a closed circulation passage is formed, liquid metal in the circulation passage circularly flows clockwise, and the pipelines used in the circulation passage are steel pipelines.

The specific implementation process is as follows:

the workpiece to be cooled is placed on the supporting tube 109 by a traveling crane (or other means) in a workshop, in this embodiment, the workpiece takes an electrolytic aluminum stub as an example, and the bus adhered with the electrolytic aluminum stub is placed in the inner tube 101. After the electrolytic aluminum residual anode is placed, the top cover 200 is covered on the top of the heat exchange cylinder 100 through the lifting lugs, and the electrolytic aluminum residual anode slightly collides with the supporting pipes 109 when being placed, so that residual slag on the electrolytic aluminum residual anode falls into the slag collecting box 110 through gaps between the supporting pipes 109. The slag collecting box 110 can slide horizontally, and when the broken slag needs to be cleaned, the slag collecting box 110 can slide out to be cleaned intensively.

The initial temperature of the electrolytic aluminum anode scrap is up to over 900 ℃, so that the air around the electrolytic aluminum anode scrap is heated, and the hot air flow continuously flows upwards due to the rising characteristic of the hot air flow. The circulating pump 400 is started, so that the liquid metal continuously circulates in the circulating passage, the low-temperature liquid metal flowing through the heat absorbing pipe 105 and the supporting pipe 109 takes away heat near the electrolytic aluminum stub and heat in the hot airflow flowing upwards, absorption of waste heat is achieved, when the liquid metal flows through the heat exchange assembly, the heat absorbing end of the Stirling generator absorbs heat, the Stirling generator generates electricity, the electricity generating process of the Stirling generator is the prior art, and details are not repeated in the embodiment. As the Stirling generator absorbs and utilizes the heat in the liquid metal, the temperature of the liquid metal is reduced, and the Stirling generator can participate in the cycle absorption of the heat of the electrolytic aluminum stub again.

When the hot air flow rises to be close to the top cover 200, the protrusion 201 is in an inverted cone shape, so that the hot air flow flows along the outer periphery of the protrusion 201 to the direction close to the inner wall of the inner cylinder 101, the hot air flows through the heat dissipation holes 104 to enter the groove 103, and the heat of the hot air is taken away by the heat exchange medium in the heat absorption pipe 105.

Example two

The difference between this embodiment and the first embodiment is:

as shown in fig. 6, a plurality of heat conducting units are uniformly distributed on the bottom of the top cover 200 along the protrusion 201, and the heat conducting units are used for dispersing the heat from the bottom of the top cover 200 to the heat absorbing pipes 105. Specifically, the heat conduction unit includes heat-conducting plate 300 and the drive heat-conducting plate 300 round the reciprocating swing's of horizontal axis actuating mechanism, heat-conducting plate 300 is located between arch 201 and inner tube 101, actuating mechanism includes gear motor 301 and guide arm 302 in this embodiment, gear motor 301 fixes the top at top cap 200, and be equipped with the shaft hole that supplies gear motor 301's output shaft to pass on top cap 200, coaxial fixed with the incomplete gear 304 that is located top cap 200 below in gear motor 301's the drive shaft, guide arm 302 horizontal rotation connects the bottom at top cap 200, specifically do: a bearing seat 303 is fixed at the bottom of the top cover 200, the guide rod 302 is connected with the bearing seat 303 through a bearing, an end face gear 305 engaged with the incomplete gear 304 is coaxially fixed at the end of the guide rod 302, in the embodiment, the end face gear 305 and the incomplete gear 304 have straight teeth, the guide rod 302 is provided with a torsion spring fixed at the bottom of the top cover 200, and the heat conducting plate 300 is fixed on the guide rod 302.

When the incomplete gear 304 and the face gear 305 are in an unmeshed state, the lower end of the heat conducting plate 300 inclines towards one side of the protrusion 201, during operation, the reduction motor 301 drives the incomplete gear 304 to rotate at a slow speed, when the incomplete gear 304 is meshed with the face gear 305, the guide rod 302 rotates, so that the heat conducting plate 300 swings towards one side far away from the protrusion 201, meanwhile, the torsion spring stores energy, when the incomplete gear 304 is disengaged from the face gear 305, the torsion spring releases energy, so that the guide rod 302 rotates in a reverse direction rapidly, the heat conducting plate 300 resets rapidly, and therefore reciprocating swing of the heat conducting plate 300 is achieved.

A plurality of air bags 306 are fixed between the heat conducting plate 300 and the bulge 201, one side of each air bag 306 is bonded on the bulge 201, the other side of each air bag 306 is bonded on the heat conducting plate 300, gaps are reserved among the air bags 306, each air bag 306 is provided with an air inlet one-way valve, a plurality of vent holes 307 communicated with the inside of each air bag 306 are formed in the heat conducting plate 300, the vent holes 307 are obliquely arranged relative to the heat conducting plate 300, namely when the heat conducting plate 300 is close to the bulge 201, the central axis of each vent hole 307 is in a vertical state, an air outlet one-way valve 308 is arranged in each vent hole 307, when the volume of each air bag 306 is reduced, the air pressure in each air bag 306 is increased, the air outlet one-way valve 308 is opened, the air in each air bag 306 is exhausted, and when the volume of each air bag 306 is increased.

Because most of the heat of the hot air flow is absorbed by the heat exchange medium when the hot air flow rises to the vicinity of the top cover 200, the temperature is greatly reduced to about 100-.

The specific implementation process is as follows:

after the top cover 200 is covered on the heat exchange cylinder 100, the power supply connected with the speed reduction motor 301 is turned on, so that the heat conduction plate 300 in the heat exchange cylinder 100 swings back and forth, when hot air flow rises to be close to the top cover 200, the hot air flows to the periphery of the protrusion 201 due to the blocking of the protrusion 201, and the air bag 306 between the protrusion 201 and the heat conduction plate 300 exists, the air bag 306 has a certain blocking effect on the hot air flow, so that the hot air flows to the heat conduction plate 300, when the heat conduction plate 300 swings away from one side of the protrusion 201, the thrust for the hot air to flow to the side wall of the inner cylinder 101 is given, the hot air flow is enabled to quickly exchange heat with liquid metal in the heat absorption pipe 105.

When the heat conducting plate 300 swings to the side far away from the protrusion 201, the air bag 306 stretches the inner volume to increase, the inner air pressure is reduced, the air inlet check valve is opened, the external hot air flows into the air bag 306, when the heat conducting plate 300 swings to the side near the protrusion 201, the air bag 306 is extruded, the volume of the air bag 306 is reduced, the inner air pressure is increased, the air outlet check valve 308 is opened, the hot air in the air bag 306 is discharged through the air outlet 307, and the outlet of the air outlet 307 inclines downwards, so that the hot air flow discharged by the air bag 306 provides downward acting force for the hot air flow close to the top cover 200, the rising speed of the hot air flow is reduced, the probability of heat exchange between the hot air flow.

In addition, since the heat conduction plate 300 is reset by the energy released by the torsion spring, the resetting speed of the heat conduction plate 300 is high, the flow rate of the gas discharged through the exhaust hole 307 is high, and the acting force on the gas flow below the gas flow is also increased.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements 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.

Claims

1. Waste heat power generation system, its characterized in that: the heat absorption device comprises a heat absorption assembly, a Stirling generator and a circulating pump for driving a heat exchange medium to circulate; the heat absorption assembly comprises a heat exchange cylinder, the heat exchange cylinder comprises a placing cavity for placing a high-temperature workpiece and a cooling channel for supplying heat exchange medium for circulation, and at least one end face of the heat exchange cylinder is provided with a top cover for covering the heat exchange cylinder; the cooling channel and the circulating pump are communicated end to end through a pipeline to form a closed circulating passage, and a heat exchange assembly used for providing heat to a heat absorption end of the Stirling generator is arranged on the pipeline.

2. The cogeneration system of claim 1, wherein: the heat absorption assembly is arranged between the Stirling generator and the heat absorption assembly, the temperature-sensitive sensor is arranged between the auxiliary heat assembly and the heat absorption assembly and electrically connected with the controller, the temperature-sensitive sensor and the controller are electrically connected with the auxiliary heat assembly, and the controller is used for controlling the auxiliary heat assembly to be opened and closed.

3. The cogeneration system of claim 2, wherein: and a liquid storage tank is communicated in the circulating passage and is arranged between the circulating pump and the Stirling generator.

4. The cogeneration system of claim 1, wherein: the heat exchange cylinder is vertically arranged and comprises an inner cylinder and an outer cylinder fixed outside the inner cylinder, the inner cylinder is a placing cavity, and a cooling channel is formed between the inner cylinder and the outer cylinder; the top cover is arranged on the upper end surface of the heat exchange cylinder, and an inverted cone-shaped bulge is arranged on one surface of the top cover, which is in contact with the heat exchange cylinder.

5. The cogeneration system of claim 4, wherein: the heat-insulation cover is characterized in that a cavity is formed in the top cover, the top of the cavity is open, a detachable cover plate is arranged at the top of the cavity, and heat-insulation materials are filled in the cavity.

6. The cogeneration system of claim 5, wherein: the outer wall of the inner barrel is provided with a groove, a heat absorption pipe for heat supply exchange medium flowing is arranged in the groove, and the inner wall of the inner barrel is provided with a plurality of heat dissipation holes communicated with the groove.

7. The cogeneration system of claim 6, wherein: the bottom of top cap is equipped with a plurality of heat conduction units along protruding equipartition, and the heat conduction unit includes heat-conducting plate and the actuating mechanism that drives the heat-conducting plate and reciprocate the swing around horizontal axis, the heat-conducting plate is located between arch and the inner tube, be fixed with a plurality of gasbags between heat-conducting plate and the arch, be equipped with the check valve that admits air on the gasbag, be equipped with the exhaust hole of intercommunication gasbag on the heat-conducting plate, be equipped with the check valve of giving vent to.

8. The cogeneration system of claim 7, wherein: the vent hole is obliquely arranged, and an outlet at one side far away from the air bag faces downwards.

9. A cogeneration system according to any one of claims 1-8, wherein: the heat exchange assembly comprises a heat exchange box which is fixed on the pipeline and communicated with the pipeline, the heat absorption end of the Stirling generator is inserted into the heat exchange box, and a sealing piece which is positioned at the joint of the heat exchange box and the Stirling generator is arranged on the heat exchange box.

10. The cogeneration system of claim 7, wherein: a plurality of metal supporting tubes communicated with the heat absorbing tubes are distributed at the lower part of the inner cylinder in a staggered manner; the lower end of the heat exchange cylinder is horizontally connected with a slag collecting box in a sliding way.