Waste heat recovery system of boarding machine

Abstract

The waste heat recovery system of the boarding machine comprises a drying oven structure and a first heat exchanger arranged on the drying oven structure, and the first heat exchanger comprises a steam inlet channel, a first air inlet channel and a first air outlet channel. One end of the steam inlet channel is communicated with the drying oven structure, the other end of the steam inlet channel is communicated with the first heat exchanger, the first air inlet channel is communicated with the first heat exchanger so as to introduce cold air into the first heat exchanger, one end of the first air outlet channel is communicated with the first heat exchanger, and the other end of the first air outlet channel is communicated with the drying oven structure. And the hot air subjected to heat exchange is input into the drying oven structure. Steam of the drying oven structure enters the first heat exchanger through the steam inlet channel, cold air in the first heat exchanger is heated in the first heat exchanger, the cold air is heated in the first heat exchanger to form hot air, and the hot air can be introduced back into the drying oven structure, so that the temperature in the drying oven structure is increased. Waste heat is effectively utilized, and it can be guaranteed that the oven reaches the preset temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology for stenters, and specifically to a waste heat recovery system for stenters. Background Technology

[0002] During continuous heating, steam carries away a large amount of waste heat. A complete waste heat recovery system can help enterprises make fuller and more continuous use of thermal energy, thereby achieving the goal of energy conservation and emission reduction. Existing waste heat recovery technologies suffer from problems such as low efficiency and poor stability. Furthermore, when setting the temperature of the oven, the oven often fails to reach the set temperature, resulting in poor heating effect and inaccurate temperature control.

[0003] Furthermore, precise control of the drainage temperature during the steam waste heat recovery process is not possible. To improve the compatibility between the waste heat recovery system and the stenter, and to meet the company's urgent need for high efficiency and energy saving, [further measures are needed]. Utility Model Content

[0004] This utility model addresses one of the problems existing in the prior art to a certain extent. Therefore, one objective of this utility model is to propose a waste heat recovery system for a setting machine, which effectively utilizes waste heat and ensures that the oven reaches the preset temperature.

[0005] The above objective is achieved through the following technical solution:

[0006] A waste heat recovery system for a setting machine includes an oven structure and a first heat exchanger disposed on the oven structure. The first heat exchanger includes a steam inlet channel, a first air inlet channel, and a first air outlet channel. The inflow end of the steam inlet channel is connected to the oven structure, and the outflow end of the steam inlet channel is connected to the first heat exchanger. The first air inlet channel is connected to the first heat exchanger to introduce cold air into the first heat exchanger. One end of the first air outlet channel is connected to the first heat exchanger, and the other end is connected to the oven structure to input the heat-exchanged hot air into the oven structure.

[0007] As a further improvement of this utility model, it also includes a main steam pipeline, which is connected to the oven structure to input steam into the oven structure, and a first pressure detector is provided on the main steam pipeline.

[0008] As a further improvement of this utility model, it also includes a controller, on which a second pressure detector and a first valve are provided. The controller is electrically connected to the first pressure detector, the second pressure detector and the first valve respectively, so as to control the opening degree of the first valve by the difference between the first pressure detector and the second pressure detector.

[0009] As a further improvement of this utility model, the oven structure includes a first oven section, a second oven section, a third oven section, a fourth oven section, a fifth oven section, a sixth oven section, a seventh oven section, an eighth oven section, and a ninth oven section connected in sequence, with the first heat exchanger located near the first oven section.

[0010] As a further improvement of this utility model, it also includes a total output channel, which is connected to the first heat exchanger and is used to discharge water vapor from the first heat exchanger.

[0011] As a further improvement of this utility model, it also includes a second heat exchanger and a condensate outlet channel. The second heat exchanger is located near the tail end of the oven structure. The main output channel is connected to the second heat exchanger, and the condensate outlet channel is connected to the second heat exchanger to discharge the condensate from the second heat exchanger.

[0012] As a further improvement of this utility model, it also includes a second air inlet channel and a second air outlet channel. The second air inlet channel is connected to the second air exchanger and is used to input cold air into the second air exchanger. One end of the second air outlet channel is connected to the second air exchanger and the other end is connected to the oven.

[0013] As a further improvement of this utility model, a temperature detector is provided on the condensate outflow channel.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects:

[0015] This invention proposes a waste heat recovery system for a setting machine. Steam from the oven structure enters the first heat exchanger through a steam inlet channel, where it heats the cold air inside the first heat exchanger, forming hot air. This hot air can then be returned to the oven structure, raising the temperature within the oven. This effectively utilizes waste heat and ensures the oven reaches the preset temperature. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the waste heat recovery system of a shaping machine in one embodiment. Detailed Implementation

[0017] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0018] like Figure 1A waste heat recovery system for a setting machine includes an oven structure 1 and a first heat exchanger 2 disposed on the oven structure 1. The first heat exchanger 2 includes a steam inlet channel 3, a first air inlet channel 21, and a first air outlet channel 22. One end of the steam inlet channel 3 is connected to the oven structure 1 and the other end is connected to the first heat exchanger 2. The first air inlet channel 21 is connected to the first heat exchanger 2 to introduce cold air into the first heat exchanger 2. One end of the first air outlet channel 22 is connected to the first heat exchanger 2 and the other end is connected to the oven structure 1 to input the heat-exchanged hot air into the oven structure 1.

[0019] This invention proposes a waste heat recovery system for a setting machine. Steam from the oven structure 1 enters the first heat exchanger 2 through the steam inlet channel 3, where it heats the cold air. The heated cold air becomes hot air, which can then be returned to the oven structure 1, raising the temperature within the oven structure 1. This effectively utilizes waste heat and ensures the oven reaches the preset temperature.

[0020] In the first heat exchanger 2, the steam temperature and the air temperature exchange heat, effectively heating the cold air into hot air.

[0021] It also includes a main steam pipeline 4, which is connected to the oven structure 1 to input steam into the oven structure 1, and a first pressure detector 41 is provided on the main steam pipeline 4. The steam pressure on the main steam pipeline 4 can be detected by the first pressure detector 41. The main steam pipeline 4 is used to input heating steam into the oven structure 1 to heat the entire oven structure 1.

[0022] It also includes a controller, on which a second pressure detector 41 and a first valve 32 are provided. The controller is electrically connected to the first pressure detector 41, the second pressure detector 31 and the first valve 32 respectively, so as to control the opening degree of the first valve 32 by the difference between the first pressure detector 41 and the second pressure detector 31.

[0023] In this embodiment, the first valve 32 is in a normally open state.

[0024] In this embodiment, the minimum opening degree of the first valve 32 can be controlled by the controller, so that the first valve 32 can be kept in a normally open state.

[0025] In some embodiments, the minimum opening degree of the first valve 32 can be set to 15%, and the maximum opening degree can be fully opened to 100%.

[0026] When the pressure difference between the first pressure detector 41 and the second pressure detector 31 reaches a set value, the first valve 32 is opened to a first degree of opening; and the first valve 32 is maintained at the first degree of opening until the pressure difference between the first pressure detector 41 and the second pressure detector 31 is less than the set value. At this point, the first valve 32 is controlled to be at its minimum opening. This allows steam to be effectively discharged even when the pressure difference is large.

[0027] In this embodiment, the oven structure 1 includes nine oven sections. Specifically, the oven structure 1 includes a first oven section 11, a second oven section 12, a third oven section 13, a fourth oven section 14, a fifth oven section 15, a sixth oven section 16, a seventh oven section 17, an eighth oven section 18, and a ninth oven section 19 connected in sequence, and the first heat exchanger 2 is disposed near the first oven section 11.

[0028] In this embodiment, the first oven section 11, the second oven section 12, the third oven section 13, the fourth oven section 14, the fifth oven section 15, the sixth oven section 16, the seventh oven section 17, the eighth oven section 18, and the ninth oven section 19 each have a separate steam discharge channel. Furthermore, the steam discharge channels of these oven sections are all connected to the steam inlet channel 3, ensuring that steam from each oven section can flow out to the first heat exchanger 2.

[0029] In this embodiment, one end of the first air outlet duct 22 is connected to the first heat exchanger 2, and the other end is connected to the first oven section 11, so that hot air can flow into the first oven section 11, effectively utilizing waste heat. Furthermore, since the first oven section 11 often fails to reach the set temperature in a multi-section oven, resulting in a low temperature, the introduction of hot air can supplement the temperature of the first oven section 11, ensuring that the set temperature is reached.

[0030] It also includes a main output channel 5, which is connected to the first heat exchanger 2 and is used to discharge water vapor from the first heat exchanger 2. That is, in the first heat exchanger 2, steam enters through the steam inlet channel 3, and after heat exchange, the steam flows out through the main output channel 5.

[0031] In some embodiments, the system further includes a second heat exchanger 6 and a condensate outlet channel 7. The second heat exchanger 6 is located near the rear of the oven structure 1. The main output channel 5 is connected to the second heat exchanger 6, and the condensate outlet channel 7 is connected to the second heat exchanger 6 to discharge the condensate from the second heat exchanger 6. By providing the second heat exchanger 6, the waste heat in the first heat exchanger 2 can be further absorbed.

[0032] In some embodiments, a condensate collection tank 9 is also included, into which condensate discharged from the condensate outlet channel 7 is discharged to collect the condensate.

[0033] It also includes a second air inlet channel 61 and a second air outlet channel 62. The second air inlet channel 61 is connected to the second heat exchanger 6 and is used to input cold air into the second heat exchanger 6. One end of the second air outlet channel 62 is connected to the second heat exchanger 6, and the other end is connected to the oven structure 1. Cold air can enter the second heat exchanger 6 through the second air inlet channel 61, and the hot air after heat exchange can flow out into the oven structure 1 through the second air outlet channel 62.

[0034] In this embodiment, one end of the second air outlet channel 62 is connected to the second heat exchanger 6 and the other end is connected to the ninth oven 19, which can transfer hot air to the ninth oven, that is, transfer it back to the tail oven of the oven structure 1, which can effectively ensure that the temperature of the tail oven reaches the preset value.

[0035] If the ninth oven 19 often fails to reach the set temperature, it indicates a problem of low temperature. This can be addressed by blowing in hot air to supplement the temperature of the ninth oven 19 and ensure that the set temperature is reached.

[0036] A temperature detector 71 is installed on the condensate outflow channel 7 to detect the temperature of the discharged condensate.

[0037] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A waste heat recovery system for a setting machine, characterized in that, The device includes an oven structure and a first heat exchanger disposed on the oven structure. The first heat exchanger includes a steam inlet channel, a first air inlet channel, and a first air outlet channel. One end of the steam inlet channel is connected to the oven structure and the other end is connected to the first heat exchanger. The first air inlet channel is connected to the first heat exchanger to introduce cold air into the first heat exchanger. One end of the first air outlet channel is connected to the first heat exchanger and the other end is connected to the oven structure to input the heat-exchanged hot air into the oven structure.

2. A waste heat recovery system for a setting machine according to claim 1, wherein It also includes a main steam pipeline, which is connected to the oven structure to input steam into the oven structure, and a first pressure detector is provided on the main steam pipeline.

3. A waste heat recovery system for a setting machine according to claim 2, wherein It also includes a controller, on which a second pressure detector and a first valve are provided. The controller is electrically connected to the first pressure detector, the second pressure detector and the first valve respectively, so as to control the opening degree of the first valve by the difference between the first pressure detector and the second pressure detector.

4. A waste heat recovery system for a setting machine according to claim 1, wherein The oven structure includes a first oven section, a second oven section, a third oven section, a fourth oven section, a fifth oven section, a sixth oven section, a seventh oven section, an eighth oven section, and a ninth oven section connected in sequence, with the first heat exchanger located near the first oven section.

5. A waste heat recovery system for a setting machine according to claim 4, wherein It also includes a main output channel, which is connected to the first heat exchanger and is used to discharge water vapor from the first heat exchanger.

6. A waste heat recovery system for a setting machine according to claim 5, wherein It also includes a second heat exchanger and a condensate outlet channel. The second heat exchanger is located near the rear of the oven structure. The main output channel is connected to the second heat exchanger, and the condensate outlet channel is connected to the second heat exchanger to discharge the condensate from the second heat exchanger.

7. A waste heat recovery system for a setting machine according to claim 6, wherein It also includes a second air inlet channel and a second air outlet channel. The second air inlet channel is connected to the second air exchanger and is used to input cold air into the second air exchanger. One end of the second air outlet channel is connected to the second air exchanger and the other end is connected to the oven.

8. A waste heat recovery system for a setting machine according to claim 6, wherein A temperature detector is installed on the condensate outflow channel.

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