CN210717627U

CN210717627U - Chimney waste gas waste heat utilization equipment based on thermoelectric generation

Info

Publication number: CN210717627U
Application number: CN201921863258.9U
Authority: CN
Inventors: 红兰; 刘丽
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-06-09
Anticipated expiration: 2029-11-01

Abstract

The utility model provides a chimney waste gas waste heat utilization device based on thermoelectric generation, which comprises a metal plate fixedly arranged inside a chimney and used for collecting waste heat close to the top end, a waste heat collecting end is arranged at the bottom end of the metal plate, the waste heat collecting end comprises an elliptical plate and a mounting plate, a through hole is arranged in the middle of the elliptical plate, the middle of the metal plate is of a broken line type, the transverse section of the metal plate is fixed at the top end of the chimney, the top end of the metal plate is provided with a mounting end, a thermoelectric generation sheet is fixed at the side surface of the mounting end away from one side of the chimney, a heat dissipation mechanism is attached to the cooled end of the thermoelectric generation sheet, a transverse support plate is fixed at the top end of the mounting end, the top end of the heat dissipation mechanism is fixed at the bottom surface of the support plate, the problem that the contact surface between the metal plate used for heat collection inside the chimney and the flue gas, the efficiency of power generation is affected.

Description

Chimney waste gas waste heat utilization equipment based on thermoelectric generation

Technical Field

The utility model belongs to the technical field of thermoelectric generation's chimney waste gas utilization equipment, concretely relates to chimney waste gas waste heat utilization equipment based on thermoelectric generation.

Background

The temperature difference thermal power generation technology is a technology which utilizes the temperature difference between a high temperature heat source and a low temperature heat source, adopts low boiling point working fluid as a cycle working medium, and uses the steam generated by heating and evaporating the cycle working medium by the high temperature heat source to drive a turbine to generate power on the basis of Rankine Cycle (RC). The working fluid in the evaporator is heated and evaporated by the high-temperature heat source, the evaporated working fluid is adiabatically expanded in the turbine to push blades of the turbine to achieve the purpose of generating power, the generated working fluid is introduced into the condenser, and the heat of the generated working fluid is transferred to the low-temperature heat source, so that the working fluid is cooled and recovered into liquid, and then the liquid is sent to the evaporator by the circulating pump to form a circulation. The physical explanation for the thomson effect is: when the temperature in the metal is not uniform, the kinetic energy of free electrons at a high temperature is greater than that of free electrons at a low temperature. Like a gas, thermal diffusion occurs when the temperature is not uniform, so that free electrons diffuse from the high temperature end to the low temperature end, and accumulate at the low temperature end, thereby forming an electric field in the conductor, and inducing a potential difference across the metal rod. This diffusion of free electrons proceeds until the action of the electric field forces on the electrons balances the thermal diffusion of the electrons.

The heat utilization efficiency of the flue gas after the existing factory chimney waste gas is treated and discharged is poor, a heat exchanger is generally utilized for heat exchange, equipment for utilizing the waste heat of the flue gas by utilizing thermoelectric generation is also utilized, and through retrieval, the utility model with the Chinese patent publication No. CN207368908U discloses a waste heat utilization device of the chimney waste gas, which comprises a plurality of metal plates, the lower ends of the metal plates extend into the chimney and are relatively fixed with the inner side wall of the chimney, and the upper ends of the metal plates are positioned outside the chimney; the thermoelectric generation pieces are arranged on the installation side of the metal plate, and the hot ends of the thermoelectric generation pieces are matched with the installation side of the metal plate in an attached manner; and the control circuit is electrically connected with the temperature difference power generation sheet and is used for outputting the electric energy generated by the temperature difference power generation sheet to the outside. This application metal sheet conveys the heat to the hot junction of thermoelectric generation piece, and the metal sheet is kept away from to the cold junction of thermoelectric generation piece, and can dispel the heat for the cold junction in the air flow of high latitude to keep the difference in temperature of thermoelectric generation piece hot junction and cold junction.

But the following disadvantages exist in the using process:

1. the contact surface between the metal plate for heat collection in the chimney and the flue gas in the chimney is small, so that the heat in the flue gas cannot be completely conducted to the thermoelectric generation sheet, and the heat is wasted;

2. the heat dissipation efficiency of the cold end of the thermoelectric generation piece is lower, so that the temperature difference between the cold section and the hot end is smaller, and the power generation efficiency is influenced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a chimney exhaust gas waste heat utilization device based on thermoelectric generation, aiming at solving the problem that the contact surface between the metal plate for heat collection inside the chimney and the flue gas and exhaust gas inside the chimney proposed in the background art is small, so that the heat inside the flue gas cannot be completely conducted to the thermoelectric generation sheet, and the heat waste can also be caused; the heat dissipation efficiency of the cold end of the thermoelectric generation piece is lower, so that the temperature difference between the cold section and the hot end is smaller, and the power generation efficiency is influenced.

In order to solve the technical problem, the utility model discloses a technical scheme is: a chimney waste gas waste heat utilization device based on thermoelectric generation comprises a metal plate fixedly mounted inside a chimney and used for collecting waste heat close to the top end, a waste heat collecting end is arranged at the bottom end of the metal plate and comprises an elliptical plate and a mounting plate, a plurality of through holes for smoke to pass through are uniformly formed in the middle of the elliptical plate, a vertical mounting plate is obliquely arranged at one side end of the elliptical plate, the mounting plate is fixed at the bottom end of the metal plate, the middle of the metal plate is of a broken line type, a transverse section of the metal plate is fixed at the top end of the chimney through a fixing block, the top end of the metal plate is provided with a mounting end, a thermoelectric generation sheet is fixed on one side face, away from the chimney, of the mounting end, the heating end and the mounting end of the thermoelectric generation sheet are attached, a heat dissipation mechanism is attached to the cooled end of the thermoelectric generation sheet, and a transverse support plate is, the top end of the heat dissipation mechanism is fixed on the bottom surface of the support plate.

Preferably, the metal plate, the waste heat collecting end and the mounting end are of an integral structure and are made of aluminum plates.

Preferably, the inclination angle between the waste heat collecting end and the side wall of the chimney is set between minus degree.

Preferably, the heat dissipation mechanism comprises a contact plate and heat dissipation fins, the top end of the contact plate is fixed below the support plate, one side of the contact plate is tightly attached to the cooled end of the thermoelectric generation sheet, and a plurality of vertical heat dissipation fins are uniformly and fixedly arranged at the other end of the contact plate.

Preferably, the bottom end of the thermoelectric generation piece is electrically connected with a first electrode wire and a second electrode wire which are used for outputting the generated electric energy.

Compared with the prior art, the utility model has the following advantage:

1. the utility model discloses a be provided with the waste heat in the bottom of metal sheet and collect the end, the elliptical plate of waste heat collection end is great with the inside contact space of chimney to make the inside flue gas of chimney flow be with the area of contact increase of waste heat collection end, and then make the heat conduction of the inside heat conduction of flue gas waste gas to the heat-conduction process of the metal sheet other end more abundant, make the inside heat availability factor of flue gas increase, and then improved the utilization efficiency of flue gas waste heat.

2. The utility model discloses a set up to broken line type in the middle of with the metal sheet to make the thermoelectric generation piece of fixing in the side of the metal sheet other end can keep the distance with the chimney, make the cold end temperature of thermoelectric generation piece lower, and then make the difference in temperature increase, improved the generating efficiency of thermoelectric generation piece.

3. The utility model discloses a be provided with heat dissipation mechanism at the end that receives cold of thermoelectric generation piece, the radiating fin of heat dissipation mechanism makes the heat effluvium of thermoelectric generation piece cold junction faster, and then makes the cold junction temperature of thermoelectric generation piece lower, also makes the difference in temperature of thermoelectric generation piece great, further improvement generating efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the lower waste heat collecting end of the present invention;

FIG. 3 is a front view of the heat dissipation mechanism of the present invention

Description of reference numerals:

1-a chimney; 2-a metal plate; 21-a waste heat collecting end; 211-oval plate; 212-through holes; 213-mounting plate; 22-a mounting end; 3-thermoelectric power generation sheet; 31 — first electrode lines; 32-second electrode lines; 4-a heat dissipation mechanism; 41-contact plate; 42-heat dissipation fins; 5-a support plate; and 6, fixing blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model provides a technical solution: the utility model provides a chimney waste gas waste heat utilization equipment based on thermoelectric generation, includes that fixed mounting collects the metal sheet 2 of usefulness near the waste heat on top in 1 inside of chimney, the bottom of metal sheet 2 is provided with waste heat collection end 21, waste heat collection end 21 includes elliptical plate 211 and mounting panel 213, a plurality of perforating holes 212 that are used for the flue gas to pass through have evenly been seted up to elliptical plate 211's centre, the slope of one side end of elliptical plate 211 is provided with vertical mounting panel 213, mounting panel 213 fixes in the bottom of metal sheet 2, and waste heat collection end 21 makes the elliptical plate 211 of waste heat collection end 21 increase at the inside area of contact with waste gas of chimney with the installation of metal sheet 2 slope for the inside waste heat conduction efficiency of flue gas increases, is convenient for improve thermoelectric generation piece 3's the stability of receiving heat, does benefit to and improves the generating efficiency.

The middle of metal sheet 2 is broken line type and its horizontal section passes through fixed block 6 to be fixed on the top of chimney 1, the top of metal sheet 2 is provided with installation end 22, installation end 22 is kept away from 1 one side of chimney and is fixed with thermoelectric generation piece 3, thermoelectric generation piece 3 receives the hot end and laminates mutually with installation end 22, and waste heat collection end 21 conducts the heat to the installation end 22 of metal sheet to make the heated end heat of thermoelectric generation piece 3 increase, produce the thermoelectric and accomplish the electricity generation process, the inside concrete structure of thermoelectric generation piece 3 and theory of operation are the common general knowledge of the technical field of the affiliated technical field technical personnel, and it is no longer repeated here.

The laminating of the end that receives cold of thermoelectric generation piece 3 has heat dissipation mechanism 4, heat dissipation mechanism 4 includes contact plate 41 and radiating fin 42, the top of installation end 22 is fixed with horizontal extension board 5, the top of contact plate 41 is fixed below extension board 5, just one side of contact plate 41 closely laminates with the end that receives cold of thermoelectric generation piece 3, the even fixed a plurality of vertical radiating fin 42 that are provided with of the other end of contact plate 41, radiating fin 42 make thermoelectric generation piece 2 receive the heat of cold junction in time to spill out to make thermoelectric generation piece 3's temperature difference value increase, improved the generating efficiency, and then make flue gas waste heat utilization efficiency increase.

In order to fully and completely transmit the residual heat energy of the flue gas to the heated end of the thermoelectric generation piece 3, the metal plate 2, the residual heat collection end 21 and the installation end 22 are of an integral structure and are made of aluminum plates, and in order to increase the contact area of the elliptic plate 211 with the flue gas in the chimney 1, the inclination angle between the residual heat collection end 21 and the side wall of the chimney 1 is set between 45 and 75 degrees.

In order to facilitate the normal connection and use of the thermoelectric generation piece 3, the bottom end of the thermoelectric generation piece 3 is electrically connected with a first electrode wire 31 and a second electrode wire 32 for outputting the generated electric energy.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a chimney waste gas waste heat utilization equipment based on thermoelectric generation, includes that fixed mounting is close to inside metal sheet (2) of the waste heat collection usefulness on top in chimney (1), its characterized in that: the bottom of metal sheet (2) is provided with waste heat collection end (21), waste heat collection end (21) includes oval plate (211) and mounting panel (213), the centre of oval plate (211) is even sets up a plurality of perforating holes (212) that are used for the flue gas to pass through, the slope of a side end of oval plate (211) is provided with vertical mounting panel (213), the bottom at metal sheet (2) is fixed in mounting panel (213), the centre of metal sheet (2) is broken line type and its horizontal section passes through fixed block (6) to be fixed on the top of chimney (1), the top of metal sheet (2) is provided with installation end (22), chimney (1) one side is kept away from in installation end (22) and is fixed with thermoelectric generation piece (3), the heated end and the installation end (22) of thermoelectric generation piece (3) are laminated mutually, the end laminating of receiving of thermoelectric generation piece (3) has heat dissipation mechanism (4), the top end of the mounting end (22) is fixed with a transverse support plate (5), and the top end of the heat dissipation mechanism (4) is fixed on the bottom surface of the support plate (5).

2. The chimney exhaust gas waste heat utilization device based on thermoelectric power generation is characterized in that the metal plate (2), the waste heat collection end (21) and the installation end (22) are of an integral structure and are all made of aluminum plates.

3. The chimney exhaust gas waste heat utilization device based on thermoelectric power generation is characterized in that the inclination angle between the waste heat collection end (21) and the side wall of the chimney (1) is set to be 45-75 degrees.

4. The chimney exhaust gas waste heat utilization device based on thermoelectric power generation is characterized in that the heat dissipation mechanism (4) comprises a contact plate (41) and heat dissipation fins (42), the top end of the contact plate (41) is fixed below the support plate (5), one side of the contact plate (41) is tightly attached to the cold receiving end of the thermoelectric power generation sheet (3), and the other end of the contact plate (41) is uniformly and fixedly provided with a plurality of vertical heat dissipation fins (42).

5. The chimney exhaust gas waste heat utilization device based on thermoelectric power generation is characterized in that the bottom end of the thermoelectric power generation sheet (3) is electrically connected with a first electrode wire (31) and a second electrode wire (32) for outputting generated electric energy.