CN111947300A - Circulating heat exchange device and method for improving heat exchange efficiency - Google Patents
Circulating heat exchange device and method for improving heat exchange efficiency Download PDFInfo
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- CN111947300A CN111947300A CN202010818023.9A CN202010818023A CN111947300A CN 111947300 A CN111947300 A CN 111947300A CN 202010818023 A CN202010818023 A CN 202010818023A CN 111947300 A CN111947300 A CN 111947300A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/027—Air heaters with forced circulation using solid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0052—Details for air heaters
- F24H9/0073—Arrangement or mounting of means for forcing the circulation of air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/12—Arrangements for connecting heaters to circulation pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1877—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/189—Arrangement or mounting of combustion heating means, e.g. grates or burners using solid fuel
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Abstract
The invention discloses a circulating heat exchange device and a method for improving heat exchange efficiency, which relate to the field of hot air equipment and comprise a furnace body, a heat conduction pipe and a circulating pipe, wherein the heat conduction pipe and the circulating pipe are uniformly arranged in a hearth of the furnace body, the circulating pipe comprises a Venturi tube and a return pipe sleeved outside the Venturi tube, one end of the return pipe is connected with the furnace body to form an air outlet, the other end of the return pipe is connected with the heat conduction pipe, a circulating channel is formed between the outer wall of the Venturi tube and the inside of the return pipe, one end of the circulating channel and one end of the heat conduction pipe are jointly communicated with an inlet of the Venturi tube, the air outlet and the other end of the circulating channel are jointly communicated with an outlet of the Venturi tube, the hearth arranged outside the communicating chamber is used for heating the heat conduction, the heat exchange efficiency is improved, and the requirement of quick start is met.
Description
Technical Field
The disclosure relates to the field of hot air equipment, in particular to a circulating heat exchange device and method for improving heat exchange efficiency.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Biomass stoves refer to the combustion of biomass material as fuel so that energy is supplied to the respective equipment in the form of hot air. Mainly aims at residents and public buildings which can not heat in a centralized way, and provides a small, safe, automatic and clean heating mode for users.
Along with the application of biomass, biomass combustion equipment is rapidly developed, but most of the existing equipment has the problems of low heat exchange efficiency and high energy consumption.
The inventors have found that at present, a heating medium such as water is often used to heat the water pipe by combustion, supplied to the inside of the heating pipe, and release heat by radiation, and that the furnace releases heat while the furnace is burning; however, the starting speed is slow, the water body is difficult to heat quickly, a large amount of indoor oxygen is consumed during particle combustion, the indoor oxygen concentration is reduced, and partial trace harmful gas and particles enter the room along with hot air to influence the indoor environment; in addition, when the traditional heat exchange device operates, in order to increase the temperature, the arrangement area of the medium in a high-temperature region of a hearth is prolonged, so that the pipeline is bent and prolonged, the airflow operation speed is slow, the coverage range of hot airflow output is insufficient, and the large-scale heat taking requirement is difficult to meet.
Disclosure of Invention
The utility model discloses a defect to prior art exists is directed against, a improve heat exchange efficiency's circulation heat transfer device and method is provided, set up the outdoor furnace of intercommunication and heat pipe and circulating pipe jointly, constitute heat transfer structure, thereby form hot-blast formula heating stove, do not consume indoor oxygen when exporting hot-blast, the heat transfer is not taken a breath, the inside circulation heating passageway that forms of circulating pipe, the air current of reflux part output carries out the secondary heating, cooperation venturi structure carries out intensive mixing, the efficiency of heat transfer is improved, satisfy the demand of quick start.
The first purpose of this disclosure is to provide a circulation heat transfer device who improves heat exchange efficiency, adopts following technical scheme:
including the furnace body, heat pipe and circulating pipe equipartition are put in the furnace of furnace body, and the circulating pipe includes that venturi and cover establish the outside back flow of venturi, and the furnace body is connected to back flow one end, forms the air outlet, and the heat pipe is connected to the other end, forms circulation channel between venturi outer wall and the back flow intraduct, and circulation channel's one end and heat pipe one end communicate venturi entry jointly, and the air outlet communicates venturi export jointly with the circulation channel other end.
Furthermore, an air inlet and an air outlet which are communicated with the hearth are arranged on one side surface of the furnace body, the circulating pipe is connected with the furnace body to form an air inlet, and the air inlet and the air outlet are arranged on the side surface of the furnace body, which is different from the side surface where the air inlet is arranged.
Furthermore, a baffle is arranged at one end of the return pipe corresponding to the air outlet, the baffle isolates the circulating channel from the air outlet, and the gas flow entering the circulating channel from the outlet of the venturi tube is changed by adjusting the relative position of the baffle and the return pipe.
Furthermore, venturi and back flow pipe are coaxial, are connected with the support between venturi outer wall and the back flow pipe inner wall, have arranged the water conservancy diversion flabellum on the support for the gas in the guide circulation passageway flows to venturi entry from the venturi export.
Further, the back flow passes through the arc and connects the heat pipe, and heat pipe one end sets up with venturi is coaxial, and the annular export structure that circulation channel intercommunication venturi entry's one end was arranged for following the heat pipe hoop, and the cooperation heat pipe communicates venturi entry jointly.
Furthermore, the parts of the circulating channel corresponding to the end face of the venturi tube are all arc-shaped inner walls of the circulating channel and air outlets of the circulating tube, and the arc-shaped inner walls are used for following the flowing of the gas.
Further, the heat conduction pipe is of a bent pipe structure, is coiled in the hearth and is used for acquiring heat in the hearth and conducting the heat into the heat conduction pipe; the outer wall of the circulating pipe is provided with a plurality of heat-taking sheets which are arranged at intervals and used for obtaining heat in the hearth and conducting the heat into the circulating channel.
Further, the circulating pipe is arranged at the upper part of the hearth, and the heat conduction pipe main body structure is arranged below the circulating pipe.
A second object of the present disclosure is to provide a method for circulating heat exchange to improve heat exchange efficiency, which uses the circulating heat exchange device as described above, and includes the following steps:
the biomass fuel is combusted in the hearth to release heat, so that the heat conduction pipe and the circulating pipe are heated;
one end of the heat conduction pipe obtains air from the room, and the air is heated in the heat conduction pipe and then is input into the circulating pipe;
air input into the circulating pipe enters the venturi tube and then flows towards the air outlet, when the venturi tube is discharged, one part of air flow is directly output to the room through the air outlet, and the other part of air flow enters the circulating channel and carries out secondary circulating heating under the action of the return pipe;
the heated air flow in the circulating channel enters the Venturi tube together with the air output by the heat conduction pipe to be mixed, so that the temperature of the air in the Venturi tube is increased, and the air flows to the air outlet direction again;
and circulating in sequence to realize heat exchange.
Further, the temperature of the position of the hearth where the heat conduction pipe is located is lower than that of the position of the hearth where the circulating pipe is located, and secondary circulating heating is conducted on air flow in the circulating pipe through the return pipe.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) the heat transfer and heat exchange structure is formed by arranging the hearth communicated with the outdoor to heat the heat conduction pipe and the circulating pipe together, so that the hot air type heating furnace is formed, indoor oxygen is not consumed while hot air is output, heat exchange is not carried out, a circulating heating channel is formed in the circulating pipe, air flow output by the backflow part is subjected to secondary heating, and is fully mixed by matching with a Venturi tube structure, so that the heat exchange efficiency is improved, and the requirement of quick start is met;
(2) the biomass combustion furnace has the advantages that the hearth area where biomass is burnt is physically isolated from the heat conduction pipe and the circulating pipe for heating air, the heat conduction pipe and the circulating pipe are directly heated to heat the air in the channel and then output the air, and the hot air type heating furnace is formed, so that the use of intermediate media is reduced, the heat transfer path is shortened, the heat exchange efficiency of the heat in the hearth and the air in the heat conduction pipe and the circulating pipe is improved, and the effect of quickly starting the heat exchange device to output hot air is achieved;
(3) air is extracted from the outdoor and supplied to the combustion furnace for use, and waste gas generated by combustion is discharged to the outdoor through the air outlet, so that the consumption of indoor air is avoided, and the air quality of the indoor environment is ensured;
(4) the Venturi tube is arranged in the return tube, the Venturi tube and the return tube are matched to form a circulating channel, the outer wall of the circulating channel is the return tube, and heat from the hearth is received through the return tube to realize secondary heating; the Venturi tube is matched with the circulating channel to form a circulating heat exchange path, and a certain amount of hot air flow is kept to be output in the continuous circulating heating process, so that the whole heat exchange device is quickly started to quickly reach the required temperature;
(5) by utilizing the characteristics of the Venturi tube, the hot air output by the heat conduction tube and the secondary heating air reflowed by the circulating channel are mixed and then output, compared with the method of directly prolonging the heating channel, the temperature rise speed of the air flow can be improved while the speed of the output air flow is ensured, and the Venturi effect can ensure that the air flow is fully mixed and then output;
(6) set up the baffle in the air outlet position, through the adjusting the baffle position, can change the gas flow who carries out the secondary circulation heating in getting into circulation channel to regulate and control its programming rate, when starting, improve the gas flow who carries out the secondary circulation heating, thereby guarantee the boot-strap rate, rapid heating up, after steady operation, suitably reduce the gas flow who gets into in the circulation channel, when guaranteeing output temperature, can effectively improve the hot air flow volume of air outlet output.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic view of the overall structure of a circulating heat exchange device in embodiment 1 of the present disclosure;
fig. 2 is a schematic diagram of the heat pipe and the circulation pipe in embodiment 1 of the present disclosure.
In the figure, 1-furnace body, 2-hearth, 3-heat pipe, 4-circulation channel, 5-air inlet, 6-air outlet, 7-air inlet, 8-air outlet, 9-return pipe, 10-Venturi tube, 11-bracket, 12-baffle, 13-heat-taking sheet, 14-flow-guiding fan blade, 15-air outlet fan, 16-heat pipe outlet, 1001-Venturi tube inlet and 1002-Venturi tube outlet.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
For convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and are not limiting in structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
As introduced in the background art, in the prior art, the heating furnace is slow in starting speed, a large amount of indoor oxygen is consumed during biomass combustion, so that the indoor oxygen concentration is reduced, partial trace harmful gas and particles enter the room along with hot air to influence the indoor environment, and in addition, the airflow operation speed is slow, so that the coverage range of hot airflow output is insufficient; in order to solve the problems, the disclosure provides a circulating heat exchange device and a circulating heat exchange method for improving heat exchange efficiency.
Example 1
In a typical embodiment of the present disclosure, a circulating heat exchange device for improving heat exchange efficiency is provided.
The furnace mainly comprises a furnace body 1, a heat conduction pipe 3 and a circulating pipe, wherein the heat conduction pipe and the circulating pipe are both arranged in a hearth of the furnace body, obtain heat from the hearth 2, heat air in a channel of the hearth and output the heat;
to the furnace body, it is shell structure, and furnace is inside to be high temperature resistant structure, in order to guarantee that the furnace body can not consume the room air at the operation in-process, influence indoor environment, is equipped with intercommunication furnace's air inlet 5 and gas outlet 6 on a furnace body side, air inlet and gas outlet all with outdoor intercommunication, acquire the air from outdoor to discharge the waste gas after will burning to outdoor, avoided the consumption and the adverse effect to the room air.
The circulating pipe comprises a Venturi tube 10 and a return pipe 9 sleeved outside the Venturi tube, one end of the return pipe is connected with the furnace body to form an air outlet 8, the other end of the return pipe is connected with a heat conduction pipe, a circulating channel 4 is formed between the outer wall of the Venturi tube and the inside of the return pipe, one end of the circulating channel and one end of the heat conduction pipe are communicated with a Venturi tube inlet 1001, and the other end of the air outlet and the other end of;
the end parts of the circulating pipe and the heat conducting pipe are communicated, the outlet 16 of the heat conducting pipe is communicated with the circulating pipe, the inlet of the heat conducting pipe is connected with the furnace body to form an air inlet 7, the air inlet and the air outlet are arranged on the side surface of the furnace body, and in order to realize the isolation from the air inlet, the heat conducting pipe is arranged on the side surface of the furnace body different from the air inlet, so that the physical isolation of the air inlet and the air inlet;
when keeping apart it, in this embodiment, can be directly with in the furnace body embedding wall for air intake, air outlet are indoor, acquire indoor air heating after export indoor, and air inlet, gas outlet are outdoor, acquire outdoor air and consume, and discharge waste gas to outdoor.
Certainly, other modes can be adopted, such as the whole furnace body is placed indoors, the air inlet and the air outlet are led out of the room through the pipelines, and the length of air circulation is increased through the pipelines, so that the corresponding fans are arranged in the pipelines, the air flow in the pipelines is promoted, and the air supply efficiency and the waste gas exhaust efficiency are ensured;
on the other hand, the whole furnace body can be placed outdoors, the air inlet and the air outlet are led into the room through pipelines, and corresponding fans are arranged at the air inlet and the air outlet, so that the efficiency of heating the indoor air entering the furnace body is promoted, the efficiency of inputting the heated air into the room is promoted, and indoor circulating heat exchange is formed;
in order to guarantee the efficiency of whole operation, take out the higher air of relative outdoor temperature from indoor and heat, can improve the operating stability of furnace body, if the inside heat supply of furnace body is sufficient, also can make the air intake directly extract the air from outdoor and heat, then pass through the pipeline input through the air outlet and indoor release heat, form indoor outer circulation heat transfer.
For the specific structure of the heat conduction pipe, the heat conduction pipe is of a bent pipe structure, is coiled in the hearth and is used for acquiring heat in the hearth and conducting the heat into the heat conduction pipe;
the circulating pipe is arranged at the upper part of the hearth, and the main structure of the heat conduction pipe is arranged below the circulating pipe;
the heat conduction pipe is mainly used for primarily heating air in the hearth, the length of the heat conduction pipe arranged in the hearth is arranged according to actual heat exchange requirements, if the difference between the required temperature and the indoor temperature is large, the length of the heat conduction pipe is properly increased, the heat exchange area between the heat conduction pipe and the hot air in the hearth is increased, and the heat exchange efficiency is improved; on the contrary, the length of the heat conduction pipe is properly reduced, the circulation length of the airflow is reduced, and the kinetic energy loss of the airflow in the air conditioner is reduced;
the circulating pipe and the heat conducting pipe are arranged up and down, the heat generated by combustion of biomass in the hearth is utilized to heat the biomass respectively, the circulating pipe which needs to be heated secondarily circularly is arranged at the upper part of the hearth due to the fact that the heat is accumulated at the upper part and the temperature of flame outer flame is highest during combustion, the heat conducting pipe which is used for preheating air is arranged at the part, relatively lower than the hearth, of the hearth, different temperature areas in the hearth are utilized to respectively correspond to different heated pipes for heating, the full utilization of the heat is guaranteed, and the heat exchange efficiency is improved.
The circulating pipe is a core structure of the circulating heat exchange device in the embodiment and comprises a venturi pipe and a return pipe which are sleeved with each other, and a formed circulating channel is used as a secondary heating channel to carry out secondary heating on hot air to be output, so that the temperature of the output air is increased, and the quick starting of the circulating heat exchange device is realized;
specifically, the venturi tube and the return pipe are coaxially arranged, a bracket 11 is connected between the outer wall of the venturi tube and the inner wall of the return pipe, and guide vanes 14 are arranged on the bracket and used for guiding the gas in the circulation channel to flow from the outlet of the venturi tube to the inlet of the venturi tube;
the backflow pipe is connected with the heat conduction pipe through the arc-shaped plate, one end of the heat conduction pipe is coaxially arranged with the Venturi tube, one end of the circulation channel, which is communicated with the inlet of the Venturi tube, is of an annular outlet structure which is annularly arranged along the heat conduction pipe, and is matched with the heat conduction pipe to be communicated with the inlet of the Venturi tube;
air input into the circulating pipe flows towards the air outlet after entering the Venturi tube, when the Venturi tube is discharged, a part of air flow is directly output to the indoor through the air outlet, the other part of air flow enters the circulating channel, and secondary circulating heating is carried out under the action of the return pipe.
The circulating channel is arranged on the outer wall of the circulating channel, and the heat from the hearth is received through the return pipe to realize secondary heating;
the Venturi tube is matched with the circulating channel to form a circulating heat exchange path, and a certain amount of hot air flow is kept to be output in the continuous circulating heating process, so that the whole heat exchange device is quickly started to quickly reach the required temperature;
utilize venturi's characteristic, the heated air to the heat pipe output mixes the back output with the secondary heating air of circulation channel backward flow, is equivalent to direct extension heating channel, can improve the programming rate of air current when guaranteeing output air velocity, and the venturi effect can guarantee that the air current intensive mixing exports again.
In order to regulate and control the output temperature and ensure the full utilization of heat during stable operation after starting, a baffle plate 12 is arranged at one end of the return pipe corresponding to the air outlet, the baffle plate isolates the circulating channel from the air outlet, and the gas flow entering the circulating channel from the outlet of the Venturi tube is changed by adjusting the relative position of the baffle plate and the return pipe;
the position of the baffle plate is adjusted, so that the flow of gas entering the circulating channel for secondary circulating heating can be changed, and the temperature rise speed of the gas can be regulated and controlled;
specifically, when starting, improve the gas flow who carries out the secondary cycle heating to guarantee the boot-strap rate, rapid heating up, after steady operation, suitably reduce the gas flow who gets into in the circulation passageway, when guaranteeing output temperature, can effectively improve the hot air flow volume of air outlet output.
In order to further improve the heat exchange efficiency of the circulating pipe, a plurality of heat taking sheets 13 which are arranged at intervals are arranged on the outer wall of the circulating pipe and used for obtaining heat in the hearth and conducting the heat into the circulating channel;
the heat taking sheet is made of a material with good heat conductivity, and the capacity of the circulating pipe for obtaining heat is increased, so that the effect of secondary circulating heating is guaranteed.
In addition, it should be pointed out that the air inlet corresponding to the heat conduction pipe is matched with an air inlet fan, so that auxiliary air flow enters the heat conduction pipe, and the flowing efficiency of the air flow in the heat conduction pipe is ensured;
correspondingly, an air outlet fan 15 is arranged at the air outlet, and the speed of the heated air flow is ensured by the air outlet fan;
the flow speed of the air outlet fan can be adjusted by adjusting the rotating speed of the air outlet fan, so that the coverage range of hot air is changed, and proper adjustment is performed according to the heating area to be covered.
Carry out physical isolation with the furnace region at biomass burning place and heated air's heat pipe, circulating pipe, heat pipe, circulating pipe direct heating are heated the inside air of its passageway and are exported after heating, form hot-blast formula heating stove, have reduced the use of intermediate medium to shorten heat transfer's route, improved the heat exchange efficiency of heat and heat pipe, the interior air of circulating pipe in the furnace, reach the hot-blast effect of quick start heat transfer device output.
Example 2
In another exemplary embodiment of the present disclosure, another method for circulating heat exchange to improve heat exchange efficiency is provided; the circulating heat exchange device for improving the heat exchange efficiency in the embodiment 1 is utilized.
The biomass fuel is combusted in the hearth to release heat, so that the heat conduction pipe and the circulating pipe are heated;
one end of the heat conduction pipe obtains air from the room, and the air is heated in the heat conduction pipe and then is input into the circulating pipe;
air input into the circulating pipe enters the venturi tube and then flows towards the air outlet, when the venturi tube is discharged, one part of air flow is directly output to the room through the air outlet, and the other part of air flow enters the circulating channel and carries out secondary circulating heating under the action of the return pipe;
the heated air flow in the circulating channel enters the Venturi tube together with the air output by the heat conduction pipe to be mixed, so that the temperature of the air in the Venturi tube is increased, and the air flows to the air outlet direction again;
and circulating in sequence to realize heat exchange.
Further, when the heat conduction pipe and the circulating pipe are arranged, the temperature of the position of the hearth where the heat conduction pipe is located is lower than that of the position of the hearth where the circulating pipe is located, and secondary circulation heating is conducted on air flow in the circulating pipe through the return pipe.
Air is extracted from the outdoor and supplied to the combustion furnace for use, and waste gas generated by combustion is discharged to the outdoor through the air outlet, so that the consumption of indoor air is avoided, and the air quality of the indoor environment is ensured;
the heat-transfer heat-exchange structure is formed by heating the heat-conducting pipe and the circulating pipe together by arranging the hearth communicated with the outdoor, so that the hot-air type heating furnace is formed, indoor oxygen is not consumed while hot air is output, and heat exchange is not carried out;
the circulating pipe is internally provided with a circulating heating channel, the air flow output by the backflow part is secondarily heated, and the circulating pipe is matched with the Venturi tube structure to be fully mixed, so that the heat exchange efficiency is improved, and the requirement of quick start is met.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The utility model provides an improve heat exchange efficiency's circulation heat transfer device, a serial communication port, the induction cooker comprises a cooker bod, heat pipe and circulating pipe equipartition are put in the furnace of furnace body, the circulating pipe includes that venturi and cover establish the outside back flow of venturi, back flow one end is connected the furnace body, form the air outlet, the heat pipe is connected to the other end, form circulation channel between venturi outer wall and the back flow intraduct, circulation channel's one end and heat pipe one end communicate the venturi entry jointly, the air outlet communicates the venturi export with the circulation channel.
2. The circulating heat exchange device for improving the heat exchange efficiency according to claim 1, wherein a gas inlet and a gas outlet which are communicated with the hearth are arranged on one side surface of the furnace body, the circulating pipe is connected with the furnace body to form a gas inlet, and the gas inlet and the gas outlet are arranged on the side surface of the furnace body different from the side surface where the gas inlet is arranged.
3. The circulating heat exchange device for improving the heat exchange efficiency as claimed in claim 1, wherein a baffle is arranged at one end of the return pipe corresponding to the air outlet, the baffle isolates the circulating channel from the air outlet, and the gas flow entering the circulating channel from the outlet of the venturi tube is changed by adjusting the relative position of the baffle and the return pipe.
4. The circulating heat exchanger for improving heat exchange efficiency as claimed in claim 1, wherein the venturi tube is coaxially disposed with the return pipe, a support is connected between an outer wall of the venturi tube and an inner wall of the return pipe, and guide vanes are disposed on the support for guiding the gas in the circulating passage to flow from an outlet of the venturi tube to an inlet of the venturi tube.
5. The circulation heat exchange device for improving the heat exchange efficiency according to claim 1, wherein the return pipe is connected with the heat conduction pipe through an arc-shaped plate, one end of the heat conduction pipe is coaxially arranged with the venturi tube, one end of the circulation channel, which is communicated with the inlet of the venturi tube, is of an annular outlet structure which is arranged along the circumferential direction of the heat conduction pipe, and the inlet of the venturi tube is communicated with the heat conduction pipe together.
6. The circulating heat exchange device for improving the heat exchange efficiency of claim 5, wherein the parts of the circulating channel corresponding to the end surfaces of the Venturi tubes are arc-shaped inner walls of the circulating channel and air outlets of the circulating tube, and are used for following the flow of the gas.
7. The cyclic heat exchange device for improving the heat exchange efficiency according to claim 1, wherein the heat conducting pipe is a bent pipe structure which is arranged in the hearth in a coiled manner and is used for acquiring heat in the hearth and conducting the heat into the heat conducting pipe; the outer wall of the circulating pipe is provided with a plurality of heat-taking sheets which are arranged at intervals and used for obtaining heat in the hearth and conducting the heat into the circulating channel.
8. The cyclic heat exchange device for improving heat exchange efficiency according to claim 7, wherein the circulation pipe is arranged at the upper part of the furnace, and the heat conductive pipe main structure is arranged below the circulation pipe.
9. A method for improving heat exchange efficiency by using the apparatus and method for improving heat exchange efficiency according to any one of claims 1 to 8, comprising the steps of:
the biomass fuel is combusted in the hearth to release heat, so that the heat conduction pipe and the circulating pipe are heated;
one end of the heat conduction pipe obtains air from the room, and the air is heated in the heat conduction pipe and then is input into the circulating pipe;
air input into the circulating pipe enters the venturi tube and then flows towards the air outlet, when the venturi tube is discharged, one part of air flow is directly output to the room through the air outlet, and the other part of air flow enters the circulating channel and carries out secondary circulating heating under the action of the return pipe;
the heated air flow in the circulating channel enters the Venturi tube together with the air output by the heat conduction pipe to be mixed, so that the temperature of the air in the Venturi tube is increased, and the air flows to the air outlet direction again;
and circulating in sequence to realize heat exchange.
10. The method of claim 9, wherein the heat pipe is at a position in the furnace where the heat pipe is located, and the temperature of the heat pipe is lower than the temperature of the circulating pipe at the position in the furnace, and the air flow in the circulating pipe is heated by the secondary circulation through the return pipe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234443A (en) * | 2021-12-25 | 2022-03-25 | 广东念智节能科技有限公司 | Electromagnetic air heater |
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| CN111947300B (en) | 2021-10-12 |
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