Heat exchanger
Through the close contact heat exchange channel and secondary heater arranged in the heat exchanger, the exhaust gas heat is transferred to the fresh air and the temperature of the fresh air is further increased, the problem of high energy consumption of fresh air is solved and the effective utilization of the exhaust gas heat is achieved and energy consumption is reduced.
Patent Information
- Application Number
- CN202420917208.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-29
AI Technical Summary
Existing production equipment consumes a lot of energy when heating fresh air, and the heat of exhaust gases cannot be effectively utilized.
Design a heat exchanger, by setting two closely-contact heat exchange channels in the heat exchanger, the discharged exhaust gas heat is transferred to the fresh air for primary heating, and the secondary heater is used to further increase the temperature of the fresh air to satisfy the satisfaction of the Operating temperature requirements of production equipment.
It improves heat exchange efficiency, reduces the energy consumption required for heating fresh air, realizes effective reuse of exhaust gas heat, and reduces the time required for secondary heating.
Smart Images
Figure CN222165799U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to heat exchange equipment, in particular to a heat exchanger. Background Art
[0002] During the production process, various types of production equipment often need to exhaust waste gas and extract fresh air as fresh air. In order to meet production needs, the fresh air usually needs to be heated to the working temperature. Therefore, heating equipment is generally added to heat the fresh air. However, this method consumes a lot of energy, and the heat of the exhaust gas cannot be effectively utilized. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a heat exchanger, which can transfer the heat of the exhausted exhaust gas to the incoming fresh air, and then reheat the fresh air that has completed the heat exchange, so that the fresh air temperature meets the demand and effectively reduces energy consumption.
[0004] In order to solve the above technical problems, the technical solutions adopted are as follows:
[0005] A heat exchanger, characterized in that it includes a secondary heater and at least one heat exchange converter, the heat exchange converter is provided with two heat exchange channels extending from left to right, the two heat exchange channels are cross-arranged and the tube walls are in close contact, the two ends of one heat exchange channel respectively constitute a first exhaust gas inlet and a first exhaust gas outlet, and the two ends of the other heat exchange channel respectively constitute a first fresh air inlet and a first fresh air outlet; the secondary heater is provided with a heating inlet and a heating outlet, and the heating inlet is connected to the first fresh air outlet.
[0006] When the heat exchanger is in use, the first exhaust gas inlet is connected to the outlet of the production equipment, and the hot exhaust gas discharged from the production equipment is discharged into one of the heat exchange channels, while the cold fresh air is sent into the other heat exchange channel through the first fresh air inlet. Since the two heat exchange channels are cross-arranged and the tube walls are in close contact, the hot exhaust gas can always exchange heat with the cold fresh air, and heat the cold fresh air once; then the hot exhaust gas that has completed the heat exchange is discharged from the first exhaust gas outlet to the subsequent exhaust gas treatment equipment, and the fresh air that has completed the first heating enters the secondary heater from the first fresh air outlet for secondary heating, so that the temperature of the fresh air discharged from the heating outlet meets the working requirements of the production equipment. This heat exchanger can exchange the heat of the discharged hot exhaust gas with the cold fresh air, and has high heat exchange efficiency. It can reduce the temperature of the hot exhaust gas while heating the cold fresh air, and when the fresh air is subsequently heated for the second time, it only takes a short heating time to heat the fresh air to the required working temperature, effectively recycling waste heat and reducing energy consumption.
[0007] In the preferred embodiment, the heat exchanger further includes a first merging air duct and a second merging air duct, the first merging air duct is provided with a second exhaust gas outlet and a plurality of second exhaust gas inlets, the second merging air duct is provided with a second fresh air outlet and a plurality of second fresh air inlets; the number of the heat exchange converters is multiple, the number of the second exhaust gas inlets and the second fresh air inlets is the same as the number of the heat exchange converters, the first exhaust gas outlet on each heat exchange converter is respectively connected to each corresponding second exhaust gas inlet, the first fresh air outlet on each heat exchange converter is respectively connected to each corresponding second fresh air inlet; the heating air inlet of the secondary heater is connected to the second fresh air outlet of the second merging air duct. Using multiple heat exchange converters can simultaneously perform heat exchange on a large amount of hot exhaust gas and cold fresh air, and by setting the first merging air duct and the second merging air duct, each heat exchange converter can be connected in series to concentrate the discharged hot exhaust gas and the supplied fresh air respectively.
[0008] In a preferred embodiment, the two heat exchange channels are a first channel and a second channel, the first channel extends from the upper left side of the heat exchange converter to the lower right side, and the second channel extends from the lower left side of the heat exchange converter to the upper right side. The first channel and the second channel are arranged in a cross-X shape in the heat exchange converter.
[0009] In the preferred embodiment, the heat exchange converter is further provided with a heat exchange matrix composed of a plurality of stacked heat exchange plates, and a fresh air channel and an exhaust gas channel are provided on the heat exchange matrix. The heat exchange matrix is arranged in the middle of the heat exchange converter, and the fresh air channel is connected to one of the heat exchange channels, and the exhaust gas channel is connected to the other heat exchange channel. Through this arrangement, a structure similar to a conventional plate heat exchanger is added to the heat exchange converter, further improving the heat exchange efficiency. The heat exchange plates are generally made of metal materials such as iron, aluminum, copper, and alloys.
[0010] In a further preferred embodiment, the heat exchange converter includes an outer shell, the heat exchange base and four partitions, the outer shell is provided with an inner cavity, the first exhaust gas inlet, the first exhaust gas outlet, the first fresh air inlet and the first fresh air outlet are all arranged on the outer shell and connected with the inner cavity; the heat exchange base is a rectangular parallelepiped, the heat exchange base is arranged in the middle position of the inner cavity, each partition extends from the four side edges corresponding to the heat exchange base to the inner wall of the inner cavity, and the four partitions divide the inner cavity into four heat exchange spaces, and the two heat exchange spaces whose side walls do not contact each other constitute the heat exchange channel.
[0011] In the preferred embodiment, the first exhaust gas outlet and the first fresh air inlet are on the same side, and the first exhaust gas inlet and the first fresh air outlet are on the same side. When the fresh air enters the heat exchange channel, it can first perform heat exchange with the hot exhaust gas that is about to be discharged and has a lower temperature. When it is transported along the heat exchange channel, it can gradually perform heat exchange with the hot exhaust gas with a higher temperature. When it is about to be discharged, the fresh air can perform heat exchange with the hot exhaust gas that has just entered the heat exchange channel and has the highest temperature. With this arrangement, the heat of the hot exhaust gas can be fully utilized to heat the fresh air, further improving the heat utilization rate.
[0012] The above-mentioned heat exchange channels generally adopt metal pipes.
[0013] The beneficial effect of the utility model is that the heat exchanger can transfer the heat of the exhausted exhaust gas to the incoming fresh air, and then reheat the fresh air that has completed the heat exchange, so that the temperature of the fresh air meets the demand, and the energy consumption is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the heat exchanger in the embodiment of the utility model. DETAILED DESCRIPTION
[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:
[0016] like Figure 1 A heat exchanger shown in the figure includes a secondary heater 1, a first merging air duct 2, a second merging air duct 3 and two heat exchange converters 4, the heat exchange converter 4 is provided with two heat exchange channels extending from left to right, the two heat exchange channels are a first channel 401 and a second channel 402, the first channel 401 extends from the upper left part to the lower right part of the heat exchange converter 4, and the second channel 402 extends from the lower left part to the upper right part of the heat exchange converter 4, the two heat exchange channels are cross-arranged and the tube walls are in close contact, the two ends of one of the heat exchange channels respectively constitute a first exhaust gas inlet 403 and a first exhaust gas outlet 404, and the two ends of the other heat exchange channel respectively constitute a first fresh air inlet 405 and a first fresh air outlet 406. A fresh air outlet 406; a second exhaust gas outlet 201 and two second exhaust gas inlets 202 are provided on the first merging air duct 2, a second fresh air outlet 301 and two second fresh air inlets 302 are provided on the second merging air duct 3, the first exhaust gas outlet 404 on each heat exchanger 4 is respectively connected with each corresponding second exhaust gas inlet 202, and the first fresh air outlet 406 on each heat exchanger 4 is respectively connected with each corresponding second fresh air inlet 302; the secondary heater 1 is provided with a heating air inlet 101 and a heating air outlet 102, and the heating air inlet 101 of the secondary heater 1 is connected with the second fresh air outlet 301 of the second merging air duct 3.
[0017] When the above-mentioned heat exchanger is in use, the first exhaust gas inlet 403 is connected to the outlet of the production equipment, and the hot exhaust gas discharged from the production equipment is discharged into one of the heat exchange channels, while the cold fresh air is sent into the other heat exchange channel through the first fresh air inlet 405. Since the two heat exchange channels are cross-arranged and the pipe walls are in close contact, the hot exhaust gas can always exchange heat with the cold fresh air, and heat the cold fresh air once; then the hot exhaust gas that has completed the heat exchange is discharged from the first exhaust gas outlet 404 to the subsequent exhaust gas treatment equipment, and the fresh air that has completed the first heating enters the secondary heater 1 from the first fresh air outlet 406 for secondary heating, so that the temperature of the fresh air discharged from the heating outlet 102 meets the working requirements of the production equipment. This heat exchanger can exchange the heat of the discharged hot exhaust gas with the cold fresh air, and by setting the first combined air duct 2 and the second combined air duct 3, the various heat exchange converters 4 can be connected in series, and the discharged hot exhaust gas and the supplied fresh air can be concentrated separately. It has a high heat exchange efficiency and can reduce the temperature of the hot exhaust gas while heating the cold fresh air. When the fresh air is subsequently heated for the second time, it only takes a short heating time to heat the fresh air to the required working temperature, thereby effectively recycling waste heat and reducing energy consumption.
[0018] The heat exchange converter 4 is also provided with a heat exchange matrix 407 composed of a plurality of stacked heat exchange plates, and a fresh air channel and an exhaust gas channel are provided on the heat exchange matrix 407. The heat exchange matrix 407 is arranged in the middle of the heat exchange converter 4, and the fresh air channel is connected to one of the heat exchange channels, and the exhaust gas channel is connected to the other heat exchange channel. Through this arrangement, a structure similar to a conventional plate heat exchanger is added to the heat exchange converter 4, further improving the heat exchange efficiency. The heat exchange plates are generally made of metal materials such as iron, aluminum, copper, and alloys.
[0019] The heat exchange converter 4 includes an outer shell 408, a heat exchange base 407 and four partitions 409. The outer shell 408 is provided with an inner cavity. The first exhaust gas inlet 403, the first exhaust gas outlet 404, the first fresh air inlet 405 and the first fresh air outlet 406 are all arranged on the outer shell 408 and connected with the inner cavity; the heat exchange base 407 is a rectangular parallelepiped, and the heat exchange base 407 is arranged in the middle position of the inner cavity. Each partition 409 extends from the four side edges corresponding to the heat exchange base 407 to the inner wall of the inner cavity, and the four partitions 409 divide the inner cavity into four heat exchange spaces, and the two heat exchange spaces whose side walls do not contact each other constitute an X-shaped heat exchange channel.
[0020] The first exhaust gas outlet 404 and the first fresh air inlet 405 are on the same side, and the first exhaust gas inlet 403 and the first fresh air outlet 406 are on the same side. When the fresh air enters the heat exchange channel, it can first perform heat exchange with the hot exhaust gas that is about to be discharged and has a lower temperature. When it is transported along the heat exchange channel, it can gradually perform heat exchange with the hot exhaust gas with a higher temperature. When it is about to be discharged, the fresh air can perform heat exchange with the hot exhaust gas that has just entered the heat exchange channel and has the highest temperature. With this arrangement, the heat of the hot exhaust gas can be fully utilized to heat the fresh air, further improving the heat utilization rate.
[0021] The heat exchange channel adopts metal pipes.
Claims
1. A heat exchanger, characterized in that: It includes a secondary heater and at least one heat exchange converter, the heat exchange converter is provided with two heat exchange channels extending from left to right, the two heat exchange channels are cross-arranged and the tube walls are in close contact, the two ends of one heat exchange channel respectively constitute the first exhaust gas inlet and the first exhaust gas outlet, and the two ends of the other heat exchange channel respectively constitute the first fresh air inlet and the first fresh air outlet; the secondary heater is provided with a heating inlet and a heating outlet, and the heating inlet is connected to the first fresh air outlet.
2. A heat exchanger according to claim 1, characterized in that: The heat exchanger also includes a first merging air duct and a second merging air duct, the first merging air duct is provided with a second exhaust gas outlet and a plurality of second exhaust gas inlets, and the second merging air duct is provided with a second fresh air outlet and a plurality of second fresh air inlets; the number of the heat exchange converters is multiple, the number of the second exhaust gas inlets and the second fresh air inlets is the same as the number of the heat exchange converters, the first exhaust gas outlet on each heat exchange converter is respectively connected with each corresponding second exhaust gas inlet, and the first fresh air outlet on each heat exchange converter is respectively connected with each corresponding second fresh air inlet; the heating air inlet of the secondary heater is connected with the second fresh air outlet of the second merging air duct.
3. A heat exchanger according to claim 1, characterized in that: The two heat exchange channels are a first channel and a second channel. The first channel extends from the upper left portion to the lower right portion of the heat exchange converter, and the second channel extends from the lower left portion to the upper right portion of the heat exchange converter.
4. A heat exchanger according to claim 1, characterized in that: The heat exchange converter is also provided with a heat exchange matrix composed of a plurality of stacked heat exchange plates, on which a fresh air channel and an exhaust gas channel are provided. The heat exchange matrix is arranged in the middle position of the heat exchange converter, and the fresh air channel is connected to one of the heat exchange channels, and the exhaust gas channel is connected to the other heat exchange channel.
5. A heat exchanger according to claim 4, characterized in that: The heat exchange converter includes an outer shell, the heat exchange base and four partitions. The outer shell is provided with an inner cavity. The first exhaust gas inlet, the first exhaust gas outlet, the first fresh air inlet and the first fresh air outlet are all arranged on the outer shell and connected with the inner cavity. The heat exchange base is a rectangular parallelepiped, and the heat exchange base is arranged in the middle position of the inner cavity. Each partition extends from the four side edges corresponding to the heat exchange base to the inner wall of the inner cavity, and the four partitions divide the inner cavity into four heat exchange spaces. Two heat exchange spaces whose side walls do not contact each other constitute the heat exchange channel.
6. A heat exchanger according to claim 1, characterized in that: The first exhaust gas outlet and the first fresh air inlet are on the same side, and the first exhaust gas inlet and the first fresh air outlet are on the same side.