CN210242516U

CN210242516U - Waste heat recovery system

Info

Publication number: CN210242516U
Application number: CN201920621595.0U
Authority: CN
Inventors: Qitang Yi; 易启堂; Fan Yang; 杨帆
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 relates to a cooling industrial equipment technical field specifically discloses waste heat recovery system, including the recovery subassembly, circulating pump, liquid reserve tank and the heat exchanger that communicate in proper order, retrieve the subassembly and include the heat receiver tube of vertical setting, the heat receiver tube includes inner tube and urceolus, forms the passageway that heat supply exchange medium flows between inner tube and the urceolus, the heat receiver tube top is equipped with the top cap that the lid closed the heat receiver tube, the bottom center department of top cap is the arch of back taper. Adopt the technical scheme in this patent to solve high temperature work piece natural cooling in the prior art, cause the problem of the waste of waste heat.

Description

Waste heat recovery system

Technical Field

The utility model relates to a cooling industrial equipment technical field, in particular to waste heat recovery 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 which needs to be recycled 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. 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.

For the cooling of the high-temperature workpiece, most of the manufacturing enterprises generally stack the high-temperature workpiece in a certain area, waste heat in the high-temperature workpiece is wasted through a natural cooling mode, and the cooling time of the high-temperature workpiece is prolonged through the cooling mode.

SUMMERY OF THE UTILITY MODEL

The utility model provides a waste heat recovery system has solved the high temperature work piece natural cooling among the prior art, causes the problem of the waste of waste heat.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the waste heat recovery system comprises a recovery component, a circulating pump, a liquid storage tank and a heat exchanger, wherein the recovery component comprises a vertically arranged heat absorption barrel, the heat absorption barrel comprises an inner barrel and an outer barrel, a heat exchange channel for heat exchange medium flowing is formed between the inner barrel and the outer barrel, a top cover for covering the heat absorption barrel is arranged at the top of the heat absorption barrel, and the circulating pump, the liquid storage tank, the heat exchanger and the heat exchange channel are sequentially communicated through pipelines to form a circulating loop of the heat exchange medium.

The technical principle and the effect of the technical scheme are as follows:

1. in the scheme, the high-temperature workpiece is placed in the heat absorbing cylinder, the heat of the high-temperature workpiece heats the gas around the high-temperature workpiece, and due to the rising characteristic of the hot air flow, the heat of the hot air flow is absorbed by the heat exchange medium between the inner cylinder and the outer cylinder in the rising process, the circulating pump provides flowing power for the heat exchange medium, and the heat is brought to the heat exchanger by the heat exchange medium, so that the waste heat of the high-temperature workpiece is recovered, the problem of waste of the waste heat caused by natural cooling of the high-temperature workpiece in the prior art is solved, and the cooling time of the high-temperature workpiece.

2. The top cover is arranged at the top of the heat absorbing cylinder in the scheme, so that the overflow amount of hot air from the top of the heat absorbing cylinder is reduced, the efficiency of waste heat recovery is improved, and the problem that the recovery effect of the waste heat is greatly reduced due to continuous overflow of the hot air from the top of the recovery assembly in the prior art is solved.

Further, a cavity is arranged in the top cover.

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.

Further, the top of cavity is uncovered and is set up, and the top of cavity is equipped with the detachable apron, and the cavity intussuseption is filled with insulation material.

Has the advantages that: 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, and a heat absorption pipe for heat exchange medium flowing is arranged in the groove.

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.

Furthermore, a plurality of heat dissipation holes communicated with the grooves are formed in the inner wall of the inner barrel.

Has the advantages that: therefore, hot air can directly enter the groove from the heat dissipation holes, so that the hot air can directly contact the heat absorption pipe, and the heat exchange effect of the heat exchange medium is further improved.

Furthermore, the bottom center of top cap is the arch of back taper.

Has the advantages that: because the heat absorbing cylinder is set to be the sandwich structure of the inner cylinder and the outer cylinder, and the heat exchange medium circulates in the heat exchange channel between the inner cylinder and the outer cylinder, when the hot air flow rises to the position near the top cover, the hot air flow is blocked by the bulge, and because the bulge is in the shape of an inverted cone, the hot air flow can flow to the cylinder wall of the inner cylinder along the periphery of the bulge, so that the heat can be quickly exchanged with the heat exchange medium between the inner cylinder and the outer cylinder, the heat exchange quantity of the hot air flowing through the top cover and the outside is reduced, and the waste heat recovery.

Further, the bottom of top cap is equipped with a plurality of heat conduction units along protruding equipartition, 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, the downthehole check valve that gives vent to anger that.

Has the advantages that: 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.

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

Has the advantages that: therefore, the airflow discharged by the air bag faces downwards, and the downward impact force is given 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, a plurality of metal supporting tubes communicated with the heat absorbing tubes are distributed at the bottom of the heat absorbing tube in a staggered manner.

Has the advantages that: due to the arrangement of the supporting pipe, the high-temperature workpiece is directly placed on the supporting pipe, the heat exchange medium in the supporting pipe can directly recover waste heat of the high-temperature workpiece, and the cooling rate of the high-temperature workpiece is improved.

Furthermore, a material receiving plate which is connected with the rack in a horizontal sliding mode is arranged below the supporting tube.

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

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the waste heat recovery system of the present invention;

fig. 2 is a perspective view of an absorber according to 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 pump heat-absorbing device comprises a liquid storage tank 1, a heat exchanger 2, a heater 3, a mechanical pump 4, an electromagnetic pump 5, a heat-absorbing cylinder 100, an inner cylinder 101, an outer cylinder 102, a groove 103, a heat-radiating hole 104, a heat-absorbing pipe 105, a mounting hole 106, a hoop 107, a mounting lug 108, a support pipe 109, a material receiving plate 110, a top cover 200, a protrusion 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.

The first embodiment is substantially as shown in figures 1, 2 and 3:

the waste heat recovery system comprises a recovery component, a circulating pump, a liquid storage tank 1, a heat exchanger 2 and a heater 3 which are sequentially communicated through a pipeline, the mechanisms are all fixed through a rack, the circulating pump comprises a mechanical pump 4 and an electromagnetic pump 5, the recovery component comprises a heat absorption barrel 100 vertically fixed on the rack, the heat absorption barrel 100 is of a sandwich structure and specifically comprises an inner barrel 101 and an outer barrel 102, the inner barrel 101 and the outer barrel 102 are fixedly arranged, a heat exchange channel with a closed upper end and a closed lower end is formed between the inner barrel 102 and the outer barrel 102, as shown in a combined figure 1, the heat exchange channel on the heat absorption barrel 100, the mechanical pump 4, the liquid storage tank 1, the heat exchanger 2, the heater 3 and the electromagnetic pump 5 are sequentially communicated through pipelines to form a circulation loop of a heat exchange medium, the liquid storage tank 1 is respectively arranged on two sides of the heat exchanger 2, the circulating pumps 4 are respectively, the plurality of heat absorbing cylinders 100 are connected in series between the mechanical pump 4 and the electromagnetic pump 5, and the plurality of heating cylinders 100 can cool a plurality of high-temperature workpieces simultaneously, so that the cooling efficiency is improved.

The outer wall of the inner cylinder 101 is provided with a spiral groove 103, the cross section of the groove 103 is semicircular, as shown in fig. 4, the inner wall of the inner cylinder 101 is provided with a plurality of heat dissipation holes 104 corresponding to and communicated with the groove 103, the heat dissipation holes 104 are through holes, a heat absorption pipe 105 for heat exchange medium to flow is clamped in the groove 103, the upper part and the lower part of the outer cylinder 102 are provided with mounting holes 106 for the heat absorption pipe 105 to pass through, and the heat absorption pipe 105 extends out of the heat absorption cylinder 100 and is communicated with a pipeline.

Be equipped with the locking mechanism of a plurality of fixed heat absorption pipes 105 on inner tube 101 outer wall, wherein locking mechanism is including being semi-annular staple bolt 107 and bolt, the outside (towards the protruding one side of staple bolt 107) bending type in both ends of staple bolt 107 becomes installation ear 108, locating hole I has been seted up on installation ear 108, be equipped with a set of screw hole I that corresponds with the locating hole position on inner tube 101 outer wall, two screw hole I in a set of screw hole I are located both sides about recess 103 respectively, pack the bolt into in locating hole I and screw hole I, thereby the realization is fixed the staple bolt 107 in heat absorption pipe 105's outside.

A plurality of supporting tubes 109 communicated with the heat absorbing tube 105 are distributed at the bottom of the heat absorbing tube 100 in a criss-cross manner, the supporting tubes 109 can be fixed on the frame or fixed below the heat absorbing tube 100 in other manners, the supporting tubes 109 are hard tubes made of stainless steel, a material receiving plate 110 horizontally connected to the frame in a sliding manner is further arranged below the supporting tubes 109, and the material receiving plate 110 is used for collecting impurities falling from a workpiece to be heat absorbed.

Be equipped with the top cap 200 that covers the heat absorbing section of thick bamboo 100 at the top of heat absorbing section of thick bamboo 100, top cap 200 is circular in this embodiment, as shown in fig. 5, is equipped with the arch 201 that is the back taper in the center department of top cap 200 bottom, is equipped with the open cavity in top 202 in top 200, and cavity 202 is the back taper equally, can dismantle on the top cap 200 to be connected with the confined apron 203 of cavity 202, specifically set up to: a positioning hole II is formed in the cover plate 203, a threaded hole II corresponding to the positioning hole II is formed in the top cover 200, bolts are installed in the positioning hole II and the threaded hole II to achieve 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.

In this embodiment, when the workpiece is cooled, the heat exchange medium introduced into the circulation loop is the low-melting-point liquid metal provided in "a low-melting-point liquid metal and the preparation method and application thereof" of the utility model patent No. 201410268984.1, the low-melting-point liquid metal is an alloy consisting of, by mass, 37% of gallium, 22% of indium, 18.6% of bismuth, 3% of aluminum, 2% of iron, 2.4% of magnesium, and 15% of tin, the melting point of the alloy is 3 ℃, and the type of the heater 3 in this embodiment is: DN125X800, which heats the liquid metal when the liquid metal is at a lower temperature (solidification).

The specific implementation process is as follows:

the prebaked electrode of electrolytic aluminum is placed on the supporting tube 109 by a travelling crane (or other modes) in a workshop, then the top cover 200 is covered on the top of the heat absorbing cylinder 100 by the lifting lugs, when a workpiece is placed in, the workpiece slightly collides with the supporting tube 109, so that the residual slag on the prebaked electrode falls on the material receiving plate 110 through the gap between the supporting tubes 109, the air around the high-temperature workpiece is heated, and the hot air flow continuously flows upwards due to the rising characteristic of the hot air flow.

When the hot air flow in the heat absorbing tube 100 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 side close to the inner tube 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 liquid metal in the heat absorbing tube 105. Open electromagnetic pump 5 in the circulation system, electromagnetic pump 5 carries liquid metal to heat-absorbing pipe 105 and stay tube 109 in, the low temperature liquid metal of heat-absorbing pipe 105 and stay tube 109 of flowing through will constantly near the work piece and the heat in the upflow hot gas stream takes away, realizes the absorption of waste heat, the high temperature liquid metal after the while heat absorption enters into through heat exchanger 2 through liquid reserve tank 1 under mechanical pump 4's effect, heat exchanger 2 chooses for use the heat accumulation formula heat exchanger in this embodiment, its principle is: the heat exchanger is filled with low-temperature water or other media, the pipeline for liquid metal to flow is arranged in the heat exchanger and penetrates through the heat exchanger, when high-temperature liquid metal flows through the pipeline, heat exchange can be formed due to the temperature difference between the high-temperature liquid metal in the pipeline and the low-temperature media in the heat exchanger, and the heat of the high-temperature liquid metal is transferred to the low-temperature media, so that the heat of the liquid metal in the pipeline is exchanged to the low-temperature media in the heat exchanger, and the recycling of waste heat is realized.

The difference between the second embodiment and the first embodiment is that:

as shown in fig. 6, a plurality of heat conducting units are uniformly distributed at the bottom of the top cover 200 along the protrusion 201, the heat conducting units are used for dispersing heat at the bottom of the top cover 200 to the heat absorbing pipe 105, wherein the heat conducting units include a heat conducting plate 300 and a driving mechanism for driving the heat conducting plate 300 to swing back and forth around a horizontal axis, the heat conducting plate 300 is located between the protrusion 201 and the inner cylinder 101, the driving mechanism in this embodiment includes a speed reducing motor 301 and a guide rod 302, the speed reducing motor 301 is fixed at the top of the top cover 200, and the top cover 200 is provided with a shaft hole for an output shaft of the speed reducing motor 301 to pass through, an incomplete gear 304 located below the top cover 200 is coaxially fixed on a driving shaft of the speed reducing: 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 absorbing tube 100, the power supply connected with the speed reducing motor 301 is turned on, so that the heat conducting plate 300 in the heat absorbing tube 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 conducting 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 conducting plate 300, when the heat conducting plate 300 swings away from one side of the protrusion 201, the thrust force for the hot air to flow to the side wall of the inner tube 101 is given, the hot air flow is enabled to quickly exchange heat with the heat exchange medium in the heat.

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. 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

1. Waste heat recovery system, its characterized in that: including retrieving subassembly, circulating pump, liquid reserve tank and heat exchanger, retrieve the subassembly and include the heat-absorbing tube of vertical setting, the heat-absorbing tube includes inner tube and urceolus, forms the heat transfer passageway that heat supply exchange medium flows between inner tube and the urceolus, the heat-absorbing tube top is equipped with the top cap that covers the heat-absorbing tube, circulating pump, liquid reserve tank, heat exchanger and heat transfer passageway communicate the circulation circuit that forms heat exchange medium in proper order through the pipeline.

2. The heat recovery system of claim 1, wherein: a cavity is arranged in the top cover.

3. The heat recovery system of claim 2, wherein: the top of cavity is uncovered and is set up, and the top of cavity is equipped with detachable apron, and the cavity intussuseption is filled with insulation material.

4. The heat recovery system of claim 1, wherein: the outer wall of the inner cylinder is provided with a groove, and a heat absorption pipe for heat supply exchange medium flowing is arranged in the groove.

5. The heat recovery system of claim 4, wherein: a plurality of heat dissipation holes communicated with the grooves are formed in the inner wall of the inner barrel.

6. The heat recovery system of claim 1, wherein: the bottom center department of top cap is the arch of back taper.

7. The heat recovery system of claim 6, wherein: the bottom of top cap is equipped with a plurality of heat conduction units along protruding equipartition, 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 anger.

8. The heat recovery 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. The heat recovery system of claim 1, wherein: and a plurality of metal supporting tubes communicated with the heat absorbing tubes are distributed at the bottom of the heat absorbing tube in a staggered manner.

10. The heat recovery system of claim 9, wherein: and a material receiving plate connected with the frame in a horizontal sliding manner is arranged below the supporting tube.