A waste heat recovery system

Abstract

The application discloses a waste heat recycling system, which comprises a drying chamber main body, a first drying chamber and a second drying chamber arranged in layers from top to bottom in the drying chamber main body, a vertical upward flue main passage arranged on the drying chamber main body, a switching flue system communicated with the flue main passage and arranged on the first drying chamber, a flue main passage communicated with the second drying chamber through a waste heat flue switching system, a flue system communicated with the flue main passage through the second drying chamber, an electric heating table arranged in the drying chamber main body through an adjusting mechanism and extending into the first drying chamber or the second drying chamber, wherein the first drying chamber and the second drying chamber are communicated through the waste heat flue switching system, so that the waste heat discharged by the first drying chamber in the cooling process can be used for drying objects in the second drying chamber, the waste heat is effectively recycled, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention relates to the technical field of waste heat recovery from drying, specifically a waste heat recovery and utilization system. Background Technology

[0002] During operation, various drying devices release a large amount of heat outdoors through heat dissipation devices and exhaust pipes, resulting in low thermal efficiency and significant energy waste. Currently, waste heat recovery systems for drying are widely accepted. These systems typically introduce waste heat air from the dryer's exhaust vent into a heat collection device. Existing technologies collect this lost heat through heat exchange, but this approach has some drawbacks in practical use. For example, the heat obtained from heat exchange may not be effectively used for drying objects; it is merely recovered, which does not reduce energy consumption during the drying process. Summary of the Invention

[0003] To address the shortcomings of existing technologies that collect lost heat through heat exchange, such as the fact that the heat obtained from heat exchange cannot be effectively used for drying objects and is merely recycled without reducing energy consumption during the drying process, this invention provides a waste heat recovery and utilization system.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] This invention discloses a waste heat recovery and utilization system, comprising a drying chamber body, wherein a first drying chamber and a second drying chamber are arranged in a vertically layered manner within the drying chamber body, and a vertically upward main exhaust duct is provided on the drying chamber body; the main exhaust duct is connected to the first drying chamber via a waste heat flue gas switching system; the second drying chamber is connected to the main exhaust duct via an exhaust system; and an electric heating platform extending into the first or second drying chamber is installed in the drying chamber body via an adjustment mechanism.

[0006] As a preferred embodiment of the present invention, the adjusting mechanism includes a guide tube disposed on the main body of the drying chamber and pointing vertically downward, and the guide tube is provided with an opening corresponding to the first drying chamber and the second drying chamber. A movable frame that moves along the guide tube is disposed inside the guide tube, and the electric heating table is disposed on the movable frame. The movable frame is provided with a closing block for closing the opening on the guide tube, and a lifting mechanism for lifting the movable frame is provided on the main body of the drying chamber.

[0007] As a preferred embodiment of the present invention, the waste heat flue gas switching system includes multiple first flue outlets arranged along the inner wall of the first drying chamber. Each first flue outlet is connected to the main exhaust duct via an independent first insulated flue. The main exhaust duct is equipped with a first electric valve plate, and each first insulated flue is equipped with a fourth electric valve plate. The fourth electric valve plate is used to control the closure of the first flue outlet. The multiple first flue outlets are opened alternately, with only one first flue outlet being open at any given time. The second drying chamber has multiple inlets, each inlet being connected to the main exhaust duct via a second insulated flue. The second insulated flue is equipped with a second electric valve plate, which is used to control the closure of the inlet. The multiple inlets are opened alternately.

[0008] As a preferred embodiment of the present invention, the smoke exhaust system includes a plurality of second smoke outlets disposed on the inner wall of the second drying chamber. The second smoke outlets are connected to the upper end of the main smoke exhaust duct via an independent third heat-insulated flue. A third electric valve plate is disposed on the third heat-insulated flue, and the third electric valve plate is used to control the closing of the second smoke outlets. The plurality of second smoke outlets are opened alternately, and only one second smoke outlet is open at any given time.

[0009] As a preferred embodiment of the present invention, a plurality of ventilation openings are provided on the kiln wall between the first drying chamber and the second drying chamber, and a groove is provided above the ventilation opening, and a closing heat insulation block for closing the ventilation opening is placed in the groove.

[0010] As a preferred embodiment of the present invention, the first drying chamber is provided with a plurality of first temperature sensors distributed within the first drying chamber for detecting the temperature within the first drying chamber.

[0011] As a preferred embodiment of the present invention, the second drying chamber is provided with a plurality of second temperature sensors distributed within the second drying chamber for detecting the temperature within the second drying chamber.

[0012] As a preferred embodiment of the present invention, an induced draft fan is provided at the end of the main exhaust duct.

[0013] As a preferred embodiment of the present invention, a connecting pipe is provided between the first drying chamber and the second drying chamber, and the connecting pipe is equipped with a conveying fan and a switching valve, and both the first drying chamber and the second drying chamber are equipped with air inlet pipes.

[0014] The above-mentioned drying method for a waste heat recovery and utilization system, and the method of using the waste heat recovery and utilization system, are as follows:

[0015] When drying in the first drying chamber, the electric heating platform is located inside the first drying chamber. The waste heat gas from the first drying chamber enters the main exhaust duct and is then sent to the second drying chamber through the waste heat flue gas switching system to dry the objects inside the second drying chamber. The exhaust gas from the second drying chamber is then sent to the main exhaust duct through the exhaust system. The adjustment mechanism moves the electric heating platform to the second drying chamber for drying.

[0016] The beneficial effects of this invention are:

[0017] 1. This waste heat recovery and utilization system comprises a first drying chamber and a second drying chamber arranged vertically within the main drying chamber, connected by a waste heat flue gas switching system. This allows the waste heat emitted from the first drying chamber to be used to dry the objects in the second drying chamber. During drying in the first drying chamber, an electric heating platform is located within it. The waste heat gas from the first drying chamber enters the main exhaust duct and is then sent to the second drying chamber via the waste heat flue gas switching system to dry the objects there. The exhaust gas from the second drying chamber is then sent back to the main exhaust duct via the exhaust system. The regulating mechanism transfers the electric heating platform to the second drying chamber for heating and drying, effectively recovering and utilizing the waste heat emitted from the first drying chamber, thus achieving energy savings. Furthermore, the first and second drying chambers can operate independently, facilitating different drying operations. There is no need to transport the dried blanks. The vertical arrangement of the first and second drying chambers effectively reduces the floor space required.

[0018] 2. In this type of waste heat recovery and utilization system, a waste heat flue gas switching system is set up to discharge the exhaust gas in the first drying chamber. Multiple first flue gas outlets are opened alternately, with only one first flue gas outlet being open at any given time. This changes the exhaust gas discharge position, and the alternating opening ensures that each object is heated evenly, thereby avoiding the situation where the gas temperature at a single flue gas outlet remains low, resulting in a low drying temperature for the object and thus failing to meet the required quality standards after drying.

[0019] 3. In this waste heat recovery and utilization system, a waste heat flue gas switching system is set up to send the waste heat flue gas discharged from the first drying chamber to the second drying chamber. This facilitates the drying of the blanks and thus achieves energy saving. The second drying chamber has multiple inlets, each of which is connected to the main exhaust duct via a third insulated flue. The third insulated flue is equipped with a third electric valve plate, which is used to control the closure of the inlet. The multiple inlets are opened alternately to switch the entry position of the waste heat flue gas, thereby ensuring that the blanks in the second drying chamber are heated evenly.

[0020] 5. In this type of waste heat recovery system, multiple second smoke outlets are set on the inner wall of the second drying chamber. These multiple second smoke outlets are opened alternately, with only one second smoke outlet open at any given time. This alternating opening ensures that each object in the second drying chamber is heated evenly, thus avoiding a situation where the gas temperature at a single smoke outlet remains low, resulting in a low drying temperature for the object and thus failing to meet the required quality standards after drying.

[0021] 6. In this waste heat recovery system, several ventilation openings are provided on the kiln wall between the first drying chamber and the second drying chamber, and a groove is provided above the ventilation opening. A heat-insulating block for closing the ventilation opening is placed in the groove. In this way, the first drying chamber and the second drying chamber can be connected as one unit to dry the same batch of objects, thus satisfying the drying work of the objects. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a waste heat recovery and utilization system according to the present invention;

[0024] Figure 2 This is a partial structural schematic diagram of a waste heat recovery and utilization system according to the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of an electric heating platform for a waste heat recovery and utilization system according to the present invention;

[0026] Figure 4 This invention relates to a waste heat recovery system, specifically the first drying chamber, which is a combination of an inlet and a closing block.

[0027] Figure 5 This is a schematic diagram of the structure of the first drying chamber of a waste heat recovery and utilization system according to the present invention.

[0028] In the diagram: 1. Main body of the drying chamber; 2. First drying chamber; 3. Second drying chamber; 4. Main exhaust duct; 5. Waste heat flue gas switching system; 6. Adjustment mechanism; 7. Electric heating platform; 8. Exhaust system; 9. Guide pipe; 10. Opening; 11. Moving frame; 12. Closing block; 13. Lifting mechanism; 14. First smoke outlet; 15. First insulated flue; 16. First electric valve plate; 18. Inlet; 19. Second insulated flue; 20. Second electric valve plate; 21. Second smoke outlet; 22. Third insulated flue; 23. Third electric valve plate; 24. Ventilation opening; 25. Groove; 26. Closing insulated block; 27. First temperature sensor; 28. Second temperature sensor; 29. ​​Exhaust fan; 30. Cinder collection box; 31. Connecting pipe; 32. Conveying fan; 33. Switch valve; 34. Air inlet pipe. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] Example: Figures 1 to 5 As shown, the present invention discloses a waste heat recovery and utilization system, comprising a drying chamber body 1, wherein a first drying chamber 2 and a second drying chamber 3 are arranged in upper and lower layers within the drying chamber body 1, and a vertically upward exhaust duct 4 is provided on the drying chamber body 1; the exhaust duct 4 is connected to the second drying chamber 3 via a waste heat flue gas switching system 5; the second drying chamber 3 is connected to the exhaust duct 4 via an exhaust system 8; an electric heating platform 7 extending into the first drying chamber 2 or the second drying chamber 3 is installed on the drying chamber body 1 via an adjustment mechanism 6; a connecting pipe 31 is also provided between the first drying chamber 2 and the second drying chamber 3, and the connecting pipe is equipped with a conveying fan 32 and a switching valve 33, and both the first drying chamber 2 and the second drying chamber 3 are provided with air inlet pipes 34, so that the waste heat gas in the second drying chamber 3 can flow into the first drying chamber 2, which facilitates the heating and drying of the blanks in the first drying chamber 2, thereby achieving an energy-saving effect.

[0031] When drying in the first drying chamber 2, the electric heating platform 7 is located inside the first drying chamber 2. The waste heat gas from the first drying chamber 2 enters the main exhaust duct 4, and then is sent to the second drying chamber 3 through the waste heat flue gas switching system 5 to dry the objects inside the second drying chamber 3. The exhaust gas from the second drying chamber 3 is then sent back to the main exhaust duct 4 through the exhaust system 8. The adjusting mechanism 6 moves the electric heating platform 7 to the second drying chamber 3 for heating and drying. The drying chamber body 1 has a first drying chamber 2 and a second drying chamber 3 arranged in upper and lower layers, and the first drying chamber 2 and the second drying chamber 3 are connected by the waste heat flue gas switching system 5. This allows the waste heat discharged from the first drying chamber 2 to dry the objects in the second drying chamber 3. When drying in the first drying chamber 2, the electric heating platform 7 is located inside the first drying chamber. The waste heat gas from the first drying chamber 2 enters the main exhaust duct 4, and then is sent to the second drying chamber 3 through the waste heat flue gas switching system 5 to dry the objects inside the second drying chamber 3. The exhaust gas in chamber 3 is sent into the main exhaust duct 4 via the exhaust system 8; the regulating mechanism 6 transfers the electric heating table 7 to the second drying chamber 3 for heating and drying, which effectively recovers and utilizes the waste heat emitted from the cooling of the first drying chamber 2, thus achieving energy saving; and the first drying chamber 2 and the second drying chamber 3 can operate independently, facilitating different drying operations; there is no need to transport the dried blanks; and the first drying chamber 2 and the second drying chamber 3 are arranged in upper and lower layers, thus integrating the first drying chamber 2 and the second drying chamber 3 together, effectively reducing the floor space.

[0032] The adjusting mechanism 6 includes a vertically downward guide tube 9 mounted on the drying chamber body 1, with openings 10 corresponding to the first drying chamber 2 and the second drying chamber 3 on the guide tube 9. A movable frame 11, moving along the guide tube 9, is located inside the guide tube 9. An electric heating platform 7 is mounted on the movable frame 11, and a closing block 12 is provided on the movable frame 11 to close the openings 10 on the guide tube 9. A lifting mechanism 13 is provided on the drying chamber body 1 to lift the movable frame 11. This facilitates the repositioning of the electric heating platform 7. When drying is required in the first drying chamber, the electric heating platform 7 is moved into the first drying chamber, and the closing block 12 closes the opening 10 on the guide tube 9 that connects to the second drying chamber. When drying blanks in the second drying chamber, they can be moved into the second drying chamber via the electric heating platform 7. Multiple electric heating platforms 7 can be provided, arranged in the first drying chamber 2 and the second drying chamber 3 as needed. This allows for the simultaneous drying of objects at different temperatures.

[0033] The waste heat flue gas switching system 5 includes multiple first flue gas outlets 14 arranged along the inner wall of the first drying chamber 2. Each first flue gas outlet 14 is connected to the main exhaust duct 4 via an independent first heat-insulated flue 15. The main exhaust duct 4 is equipped with a first electric valve plate 16, and each first heat-insulated flue 15 is equipped with a fourth electric valve plate. The fourth electric valve plate is used to control the closure of the first flue gas outlet 14. The multiple first flue gas outlets 14 are opened alternately, and only one first flue gas outlet 14 is open at any given time. The second drying chamber 3 has multiple inlets 18, each inlet 18 is connected to the main exhaust duct 4 via a second heat-insulated flue 19, and the second heat-insulated flue 19 is equipped with a second electric valve plate 20. The second electric valve plate 20 is used to control the closure of the inlet 18, and the multiple inlets 18 are opened alternately. By setting up a waste heat flue gas switching system 5, the waste heat flue gas discharged from the first drying chamber 2 is sent into the second drying chamber 3, which facilitates the drying of the blanks and thus achieves the effect of energy saving. This changes the entry position of the waste heat flue gas, thereby ensuring that the blanks in the second drying chamber 3 are heated evenly.

[0034] The exhaust system 8 includes multiple second smoke outlets 21 located on the inner wall of the second drying chamber. Each second smoke outlet 21 is connected to the upper end of the main exhaust duct 22 via an independent third insulated flue 22. A third electric valve plate 23 is installed on the third insulated flue 22 to control the closing of each second smoke outlet 21. The multiple second smoke outlets 21 open alternately, with only one outlet open at any given time. This alternating opening ensures that each object within the second drying chamber 3 is heated evenly, preventing a consistently low gas temperature at a single outlet from resulting in a low drying temperature and ultimately substandard quality after drying.

[0035] The kiln wall between the first drying chamber 2 and the second drying chamber 3 is provided with several ventilation openings 24, and a groove 25 is provided above each ventilation opening 24. A heat-insulating block 26 for closing the ventilation opening 24 is placed in the groove 25. This allows the first and second drying chambers to be connected as one unit for drying the same batch of objects, thus satisfying the drying requirements.

[0036] The first drying chamber 2 is equipped with multiple first temperature sensors 27 distributed within the first drying chamber 2 for detecting the temperature within the first drying chamber 2, and the second drying chamber 3 is equipped with multiple second temperature sensors 28 distributed within the second drying chamber 3 for detecting the temperature within the second drying chamber 3. This facilitates the detection of the temperature within each drying chamber 2, thereby making it easier to adjust the drying process.

[0037] The exhaust duct 4 is equipped with an induced draft fan 29 at its end.

[0038] The above-mentioned drying method of a waste heat recovery system first places the objects to be dried in the first drying chamber 2. The adjusting mechanism 6 transfers the electric heating table 7 to the first drying chamber 2 to dry the brick blanks in the first drying chamber 2. At the same time, the exhaust gas generated during drying is sent into the main exhaust duct 4. Under the action of the waste heat flue gas switching system 5, the preheated exhaust gas is transported to the second drying chamber 3 to dry the landscape brick blanks in the second drying chamber 3. The second drying chamber 3 has multiple inlets 18, each of which is connected to the main exhaust duct 4 via a second heat-insulated flue 19. The second heat-insulated flue 19 is equipped with a second electric valve plate 20, which is used to control the closing of the inlet 18. The multiple inlets 18 are opened alternately to change the entry position of the waste heat flue gas, thereby ensuring that the blanks in the second drying chamber 3 are heated evenly.

[0039] Multiple second smoke outlets 21 are provided on the inner wall of the second drying chamber 3. The multiple second smoke outlets 21 are opened alternately, and only one second smoke outlet 21 is open at any given time. This alternating opening ensures that each object in the second drying chamber 3 is heated evenly, thereby avoiding the gas temperature at a single smoke outlet from remaining low.

[0040] When the blanks in the second drying chamber 3 are burned, the electric heating table 7 is moved into the second drying chamber 3 by the adjustment mechanism 6 for drying, so that the blanks do not need to be moved.

[0041] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste heat recovery and utilization system, characterized in that, The equipment includes a drying chamber body (1), which contains a first drying chamber (2) and a second drying chamber (3) arranged in upper and lower layers. The drying chamber body (1) has a vertically upward exhaust duct (4). The exhaust duct (4) is connected to the first drying chamber (2) via a waste heat flue gas switching system (5). The second drying chamber (3) is connected to the exhaust duct (4) via an exhaust system (8). The drying chamber body (1) is equipped with an electric heating table (7) that extends into the first drying chamber (2) or the second drying chamber (3) via an adjustment mechanism (6). The adjustment mechanism (6) includes a guide tube (9) that is vertically downward and is disposed on the drying chamber body (1). The guide tube (9) is provided with an opening (10) corresponding to the first drying chamber (2) and the second drying chamber (3). The guide tube (9) is provided with a movable frame (11) that moves along the guide tube (9). The electric heating table (7) is disposed on the movable frame (11). The movable frame (11) is provided with a closing block (12) for closing the opening (10) on the guide tube (9). The drying chamber body (1) is provided with a lifting mechanism (13) for lifting the movable frame (11). The waste heat flue gas switching system (5) includes multiple first flue gas outlets (14) arranged along the inner wall of the first drying chamber (2). The first flue gas outlets (14) are connected to the main exhaust duct (4) via independent first heat-insulated flue (15). The main exhaust duct (4) is provided with a first electric valve plate (16). Each first heat-insulated flue (15) is provided with a fourth electric valve plate. The fourth electric valve plate is used to close the first flue gas outlet (14). The multiple first flue gas outlets (14) are opened alternately. Only one first flue gas outlet (14) is open at any given time. The second drying chamber (3) has multiple inlets (18). Each inlet (18) is connected to the main exhaust duct (4) via a second heat-insulated flue (19). The second heat-insulated flue (19) is provided with a second electric valve plate (20). The second electric valve plate (20) is used to close the inlet (18). The multiple inlets (18) are opened alternately. The smoke exhaust system (8) includes multiple second smoke outlets (21) provided on the inner wall of the second drying chamber. The second smoke outlets (21) are connected to the upper end of the main smoke exhaust duct (4) via an independent third heat-insulated flue (22). A third electric valve plate (23) is provided on the third heat-insulated flue (22), and the third electric valve plate (23) is used to control the closing of the second smoke outlets (21). The multiple second smoke outlets (21) are opened alternately, and only one second smoke outlet (21) is open at any given time.

2. The waste heat recovery and utilization system according to claim 1, characterized in that, A plurality of ventilation openings (24) are provided on the kiln wall between the first drying chamber (2) and the second drying chamber (3), and a groove (25) is provided above the ventilation opening (24), and a closing heat insulation block (26) for closing the ventilation opening (24) is placed in the groove (25).

3. The waste heat recovery and utilization system according to claim 2, characterized in that, The first drying chamber (2) is provided with a plurality of first temperature sensors (27) distributed in the first drying chamber (2) for detecting the temperature in the first drying chamber (2).

4. A waste heat recovery and utilization system according to claim 2, characterized in that, The second drying chamber (3) is provided with a plurality of second temperature sensors (28) distributed in the second drying chamber (3) for detecting the temperature in the second drying chamber (3).

5. A waste heat recovery and utilization system according to claim 2, characterized in that, An exhaust fan (29) is provided at the end of the main exhaust duct (4).

6. A waste heat recovery and utilization system according to claim 2, characterized in that, A connecting pipe (31) is provided between the first drying chamber (2) and the second drying chamber (3), and a conveying fan (32) and a switch valve (33) are provided on the connecting pipe (31), and an air inlet pipe (34) is provided on both the first drying chamber (2) and the second drying chamber (3).

7. A waste heat recovery and utilization system according to any one of claims 1-6, characterized in that, The method of using the waste heat recovery and utilization system is as follows: When drying the first drying chamber (2), the electric heating table (7) is located inside the first drying chamber (2). The waste heat gas in the first drying chamber (2) enters the main exhaust duct (4) and is then sent to the second drying chamber (3) through the waste heat flue gas switching system (5) to dry the objects in the second drying chamber (3). The exhaust gas in the second drying chamber (3) is sent to the main exhaust duct (4) through the exhaust system (8). The regulating mechanism (6) moves the electric heating table (7) to the second drying chamber (3) for drying.

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