CN111854499A - Waste heat exchanger - Google Patents
Waste heat exchanger Download PDFInfo
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- CN111854499A CN111854499A CN202010596395.1A CN202010596395A CN111854499A CN 111854499 A CN111854499 A CN 111854499A CN 202010596395 A CN202010596395 A CN 202010596395A CN 111854499 A CN111854499 A CN 111854499A
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- Prior art keywords
- flue gas
- heat exchange
- flows
- medium
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a waste heat exchanger, and belongs to the technical field of flue gas waste heat recovery. The high-temperature flue gas flows into the flue gas channel through the flue gas inlet and flows out of the flue gas outlet in a linear manner; a valve is arranged in the flue gas channel, when the valve is closed, the flue gas channel is divided into a plurality of flue gas chambers, and high-temperature flue gas flows in an S-shaped direction; when the valve is opened, the flue gas chambers on the two sides of the valve are communicated, and the flow direction of high-temperature flue gas is linear. This application can let the high temperature flue gas directly flow through flue gas passageway, can preheat in step to the medium of multiple difference again, can select the medium that needs preheat simultaneously to carry out the heat exchange. The operation is convenient and fast, and the flexibility is strong; and the production cost is reduced, and the occupied area is small.
Description
Technical Field
The invention relates to a waste heat exchanger, and belongs to the technical field of flue gas waste heat recovery.
Background
In industry, it is common to subject organic waste gases to pyrolysis, and the flue gases (carbon dioxide and water vapor) after pyrolysis are discharged into the atmosphere. At present, the incinerator is used industrially to decompose organic waste gas at high temperature. The incineration method is the most thorough method for treating organic waste gas and is also the mainstream technology at present. Organic waste gas is decomposed at high temperature to form high-temperature flue gas, the high-temperature flue gas is introduced into a heat exchanger to exchange heat with water or gas, the pair of externally-discharged high-temperature flue gas is cooled, and the water or gas used on the two pairs of production lines is heated, so that energy is saved. At present, however, a heat exchanger can only preheat one medium in use, and then the other medium is replaced to preheat the medium after preheating is finished, and the heat exchange medium is single in the heat exchange process; if several media need to be heated simultaneously, several heat exchangers need to be used, which not only occupies a large area, but also increases the production cost.
Disclosure of Invention
The invention aims to solve the technical problem of providing a waste heat exchanger aiming at the prior art, which has the advantages of simple structure, convenient operation, capability of heating various media simultaneously, production cost reduction and small occupied area.
The technical scheme adopted by the invention for solving the problems is as follows: a waste heat exchanger comprises a heat exchange tank body and heat exchange units, wherein the heat exchange units are transversely arranged in the heat exchange tank body side by side, the heat exchange units are respectively provided with a medium inlet pipeline and a medium outlet pipeline, the medium inlet pipeline and the medium outlet pipeline extend to the outside of the heat exchange tank body, and a medium flows to the heat exchange units from the medium inlet pipeline and then flows out through the medium outlet pipeline; a flue gas channel for circulating flue gas is arranged above the heat exchange unit, a flue gas inlet and a flue gas outlet are arranged at two ends of the heat exchange tank body, high-temperature flue gas flows into the flue gas channel of the heat exchange tank body through the flue gas inlet, and the high-temperature flue gas flows out after linearly flowing to the flue gas outlet; the smoke channel is internally provided with a plurality of openable valves, when the valves are closed, the smoke channel is divided into a plurality of smoke chambers, high-temperature smoke flows into the front smoke chamber through the smoke inlet and then flows to the front heat exchange unit, the high-temperature smoke exchanges heat with a medium in the front heat exchange unit, the heat-exchanged smoke flows into the rear smoke chamber, so that the smoke flows in an S-shaped flow direction, and the high-temperature smoke exchanges heat with the heat exchange units respectively and then flows out of the smoke outlet; when any valve is opened, the smoke chambers on two sides of the valve are communicated, and high-temperature smoke flows into the rear smoke chamber in a linear manner through the front smoke chamber.
The heat exchange unit comprises a plurality of heat exchange tubes which are arranged in parallel, and the heat exchange tubes are spiral and extend along the length direction of the heat exchange tank body.
The medium inlet pipeline and the corresponding medium outlet pipeline are arranged on the same side, and the medium outlet pipeline is higher than the medium outlet pipeline.
The valve corresponds to the heat exchange unit, the valve is arranged in the middle of the corresponding heat exchange unit, and when the valve is closed, high-temperature flue gas flows into the heat exchange unit.
The valves are individually controlled by corresponding controllers.
Compared with the prior art, the invention has the advantages that: a plurality of heat exchange units are arranged in the waste heat exchanger, and different media can be respectively introduced into the heat exchange units; through set up a plurality of valves in flue gas passageway, a plurality of valves are opened or are closed by the independent control of corresponding controller, change the flow direction of high temperature flue gas then, carry out the heat exchange with the medium among the different heat exchange unit. This application can enough let the high temperature flue gas directly flow through flue gas channel, can preheat the medium of multiple difference in step again, can select wherein medium that needs preheat to carry out the heat exchange simultaneously. The structure is simple, the operation is convenient and fast, and the flexibility is strong; and the production cost is reduced, and the occupied area is small.
Drawings
FIG. 1 is a schematic diagram of a waste heat exchanger according to an embodiment of the present invention;
FIG. 2 is a top view of a waste heat exchanger according to an embodiment of the present invention;
FIG. 3 is a side view of a waste heat exchanger according to an embodiment of the present invention;
in the figure, a heat exchange tank body 1, a flue gas inlet 2, a flue gas outlet 3, a flue gas channel 4, a heat exchange tube 5, a medium outflow pipeline 6 and a medium introduction pipeline 7 are arranged.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, 2, and 3, the waste heat exchanger in this embodiment includes a heat exchange tank 1 and 5 sets of heat exchange units, wherein the 5 sets of heat exchange units are transversely arranged in parallel in the heat exchange tank 1, and each heat exchange unit is provided with a medium inlet pipeline 7 and a medium outlet pipeline 6; and the medium inlet pipeline 7 and the medium outlet pipeline 6 extend to the outside of the heat exchange tank body 1 respectively, the medium inlet pipeline 7 and the medium outlet pipeline 6 are arranged on the same side, the medium outlet pipeline 6 is higher than the medium inlet pipeline 7, and the medium inlet pipeline 7, the heat exchange unit and the medium outlet pipeline 6 are communicated, so that a medium enters the heat exchange unit from the medium inlet pipeline 7 at a low position and then flows out from the medium outlet pipeline 6 at a high position. The heat transfer unit top is equipped with the flue gas passageway 4 of the high temperature flue gas circulation of recumbent, and heat transfer jar body 1 both ends are equipped with flue gas air inlet 2 and flue gas outlet 3, and high temperature flue gas flows into the flue gas passageway 4 of heat transfer jar body 1 through flue gas air inlet 2, and the high temperature flue gas in the flue gas passageway 4 is sharp flow out behind 3 to the flue gas outlet of linear type, and the high temperature flue gas does not carry out the heat exchange with the medium in the heat transfer unit this moment, and the high temperature flue gas directly flows. The heat exchange units respectively comprise a plurality of heat exchange tubes 5, the heat exchange tubes 5 are arranged in parallel, and the heat exchange tubes 5 are spiral and extend along the length direction of the heat exchange tank body 1.
5 valves are arranged in the flue gas channel 4, the valves are arranged in the middle positions of the corresponding heat exchange units, and the valves can be independently opened or closed through corresponding controllers. When 5 valves are all opened in the first working state, the high-temperature flue gas in the flue gas channel 4 flows out after sharply flowing to the flue gas outlet in a linear manner, and the high-temperature flue gas does not exchange heat with the medium in the heat exchange unit at the moment and directly flows out. In the second working state, when 5 valves are all closed, the flue gas channel 4 is divided into 5 independent flue gas chambers, and the flue gas chambers span part of the front heat exchange units and part of the rear heat exchange units, so that flue gas flows to the corresponding flue gas chambers through the front heat exchange units and then flows into the rear heat exchange units; high-temperature flue gas flows to a previous heat exchange unit after flowing into a previous flue gas cavity through the flue gas inlet 2, the high-temperature flue gas exchanges heat with a medium in the previous heat exchange unit, the flue gas after heat exchange flows into a next flue gas cavity, the flue gas in the next flue gas cavity flows into the next heat exchange unit and exchanges heat with the medium in the next heat exchange unit, and the like, so that the flue gas flow direction is S-shaped, and the flue gas flows out from the flue gas outlet 3. The high-temperature flue gas passes through 5 heat exchange units simultaneously, and exchanges heat with the medium in the 5 heat exchange units respectively in step. The working state can preheat different media simultaneously, and the device is convenient to operate, simple in structure, energy-saving and emission-reducing. The operating condition then is that part valve is opened among 5 valves in the third, and part valve is closed, and the valve of open mode makes two flue gas chambers that correspond communicate, and the flue gas flows to the back flue gas chamber from the former flue gas chamber linear type promptly, and the trend of other flue gases is the S type. For example, when the first valve is opened and the other 4 valves are closed, the first flue gas chamber is communicated with the second flue gas chamber, so that high-temperature flue gas linearly flows from the first flue gas chamber to the second flue gas chamber through the flue gas inlet without flowing through the first heat exchange unit; the high-temperature flue gas in the second flue gas cavity flows into the second heat exchange unit to exchange heat with the medium in the second heat exchange unit, and the flue gas after heat exchange flows into the third flue gas cavity and is in the same working state as the second flue gas cavity. The working state selectively preheats the medium, so that the flexibility is improved.
The heat exchange unit is provided with a plurality of heat exchange units, and different media can be respectively introduced into the heat exchange units; through set up a plurality of valves in flue gas passageway, a plurality of valves are opened or are closed by corresponding controller individual control, change the flow direction of high temperature flue gas then. This application can enough let the high temperature flue gas directly flow through flue gas channel, can preheat the medium of multiple difference in step again, can select wherein medium that needs preheat to carry out the heat exchange simultaneously. The structure is simple, the operation is convenient and fast, and the flexibility is strong; and the production cost is reduced, and the occupied area is small.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (5)
1. A waste heat exchanger is characterized in that: the heat exchange device comprises a heat exchange tank body (1) and a plurality of heat exchange units, wherein the heat exchange units are transversely arranged in the heat exchange tank body (1) side by side, the heat exchange units are respectively provided with a medium inlet pipeline (7) and a medium outlet pipeline (6), the medium inlet pipeline (7) and the medium outlet pipeline (6) extend to the outside of the heat exchange tank body (1), and a medium flows to the heat exchange units from the medium inlet pipeline (7) and then flows out through the medium outlet pipeline (6); a flue gas channel (4) for flue gas to flow is arranged above the heat exchange unit, a flue gas inlet (2) and a flue gas outlet (3) are arranged at two ends of the heat exchange tank body (1), high-temperature flue gas flows into the flue gas channel (4) of the heat exchange tank body (1) through the flue gas inlet (2), and the high-temperature flue gas flows out after linearly flowing to the flue gas outlet; a plurality of openable and closable valves are arranged in the flue gas channel (4), when the valves are closed, the flue gas channel (4) is divided into a plurality of flue gas chambers, high-temperature flue gas flows into a front flue gas chamber through the flue gas inlet (2) and then flows to a front heat exchange unit, the high-temperature flue gas exchanges heat with a medium in the front heat exchange unit, the flue gas after heat exchange flows into a rear flue gas chamber, so that the flue gas flows in an S-shaped flow direction, and the high-temperature flue gas respectively exchanges heat with the heat exchange units and then flows out from the flue gas outlet (3); when any valve is opened, the smoke chambers on two sides of the valve are communicated, and high-temperature smoke flows into the rear smoke chamber in a linear manner through the front smoke chamber.
2. A waste heat exchanger as claimed in claim 1, wherein: the heat exchange unit comprises a plurality of heat exchange tubes (5) respectively, the heat exchange tubes (5) are arranged in parallel, and the heat exchange tubes (5) are spiral and extend along the length direction of the heat exchange tank body (1).
3. A waste heat exchanger as claimed in claim 1, wherein: the medium inlet pipeline (7) and the corresponding medium outlet pipeline (6) are arranged on the same side, and the medium outlet pipeline (6) is higher than the medium outlet pipeline (7).
4. A waste heat exchanger as claimed in claim 1, wherein: the valves correspond to the heat exchange units and are arranged between the corresponding heat exchange units and the smoke chambers, and when the smoke chambers are closed by the valves, the heat exchange units are opened simultaneously, so that high-temperature smoke flows into the corresponding heat exchange units; when the valve opens the flue gas chamber, the inlet of the heat exchange unit is closed at the same time, so that the high-temperature flue gas directly flows into the flue gas chamber.
5. A waste heat exchanger as claimed in claim 1, wherein: the valves are individually controlled by corresponding controllers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596395.1A CN111854499B (en) | 2020-06-28 | 2020-06-28 | Waste heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596395.1A CN111854499B (en) | 2020-06-28 | 2020-06-28 | Waste heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111854499A true CN111854499A (en) | 2020-10-30 |
| CN111854499B CN111854499B (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010596395.1A Active CN111854499B (en) | 2020-06-28 | 2020-06-28 | Waste heat exchanger |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202329330U (en) * | 2011-09-21 | 2012-07-11 | 珠海格力电器股份有限公司 | Combined type heat exchanger and have its combined type heat transfer system |
| WO2012136124A1 (en) * | 2011-04-02 | 2012-10-11 | 阳光凯迪新能源集团有限公司 | Method and device for providing heat and carbon dioxide to vegetables and/or algae using power station flue gas |
| CN204830486U (en) * | 2015-07-21 | 2015-12-02 | 河南巨烽生物能源开发有限公司 | Multistage heat exchanger of furnace |
| CN107388585A (en) * | 2017-09-01 | 2017-11-24 | 安徽辰瑞达农业设备有限公司 | A kind of heat exchanger |
| CN209197532U (en) * | 2018-11-28 | 2019-08-02 | 福建立信换热设备制造股份公司 | A kind of dedicated reclaimer of the compressed air waste-heat of multi-medium-flow |
-
2020
- 2020-06-28 CN CN202010596395.1A patent/CN111854499B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012136124A1 (en) * | 2011-04-02 | 2012-10-11 | 阳光凯迪新能源集团有限公司 | Method and device for providing heat and carbon dioxide to vegetables and/or algae using power station flue gas |
| CN202329330U (en) * | 2011-09-21 | 2012-07-11 | 珠海格力电器股份有限公司 | Combined type heat exchanger and have its combined type heat transfer system |
| CN204830486U (en) * | 2015-07-21 | 2015-12-02 | 河南巨烽生物能源开发有限公司 | Multistage heat exchanger of furnace |
| CN107388585A (en) * | 2017-09-01 | 2017-11-24 | 安徽辰瑞达农业设备有限公司 | A kind of heat exchanger |
| CN209197532U (en) * | 2018-11-28 | 2019-08-02 | 福建立信换热设备制造股份公司 | A kind of dedicated reclaimer of the compressed air waste-heat of multi-medium-flow |
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| Publication number | Publication date |
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| CN111854499B (en) | 2021-09-07 |
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