Heat exchange metering energy-saving device of dipping machine

Abstract

The invention discloses a heat exchange metering energy-saving device of a dipping machine. The heat exchange metering energy-saving device comprises a heat exchanger, a purification device and an energy efficiency control device. A fresh air inlet is formed in the upper left side of a box body of the heat exchanger, a fan is arranged on the fresh air inlet, the box body outside the fan is of a frame structure, and filter screens capable of being detachably cleaned are arranged on four ventilation openings of the frame. A waste gas inlet is formed in the bottom of the box, a fresh air outlet is formed in the left side of the waste gas inlet, and a waste gas outlet is formed in the top of the box. The gas ejector pipe group of the purification device is arranged at the top or the bottom of the heat exchanger; flow pressure sensors are arranged on the waste gas outlet and the hot air outlet, temperature sensors are arranged on the fresh air inlet and outlet and the waste gas inlet and outlet, and the energy efficiency control device automatically adjusts the air volume of the induced draft fan and calculates the optimal energy-saving operation program to guarantee the heat exchange efficiency according to the production technology and the energy-saving requirement.

Description

Technical Field

[0001] The invention discloses a heat exchange metering and energy-saving device for an impregnation machine, and relates to the technical field of paper processing equipment production. Background Art

[0002] The impregnation machine is an industrial equipment used in the production of film paper. During the production process, the paper needs to be impregnated, coated and dried. Taking the melamine impregnation machine production line as an example, high-temperature exhaust gas will be generated during the drying process of the impregnated paper. The exhaust gas contains a lot of water vapor, solvents and volatile particles. If these exhaust gases are not discharged, the exhaust gas will affect the drying effect. However, if these exhaust gases are discharged directly, a lot of heat will be taken away, resulting in energy waste. Therefore, the market needs a special heat exchange device for impregnation machinery with a simple structure, high heat exchange efficiency, and metering and energy saving. Summary of the invention

[0003] The object of the present invention is to provide a special heat exchange device for an impregnation machine which has a simple structure, high heat exchange efficiency and metering and energy saving.

[0004] In view of the above technical problems, the present invention provides a heat exchange metering and energy-saving device for an impregnation machine, comprising a heat exchanger, a purification device and an energy efficiency control device. A fresh air inlet is arranged on the upper left side of the box of the heat exchanger, and a fan is arranged on the fresh air inlet. The box outside the fan is a frame structure, and four vents of the frame are provided with detachable and cleanable filters. An exhaust gas inlet is arranged at the bottom of the box, a fresh air outlet is arranged on the left side of the exhaust gas inlet, and an exhaust gas outlet is arranged at the top of the box. The jet pipe group of the purification device is arranged at the top or bottom of the heat exchanger, and a jet hole is arranged on the air pipe of the jet pipe group. The high-pressure air ejected from the jet hole is used to purge and clean the exhaust gas channel of the heat exchange plate; the jet pipe group is controlled by an electromagnetic valve. The first flow pressure sensor of the energy efficiency control device is arranged on the exhaust gas outlet, and the second flow pressure sensor of the energy efficiency control device is arranged on the fresh air outlet. A control valve is also arranged on the fresh air outlet; the four temperature control sensors of the energy efficiency control device are respectively arranged on the fresh air inlet, the fresh air outlet, the exhaust gas inlet and the exhaust gas outlet. The energy efficiency control device automatically adjusts the air volume of the fan according to the production process and energy-saving needs, and calculates the best energy-saving operation program based on the test data to ensure heat exchange efficiency. Under the same production process, the same product, the same output, and the same time period, the control valve and fan of the hot air outlet are opened and closed respectively, and the energy-saving efficiency and energy-saving benefits calculated by the main control model can be checked and verified. In actual testing, the energy-saving efficiency and energy-saving benefits calculated by the main control model can be accurately within 0.2% of the actual measurement error.

[0005] Preferably, a first heat exchanger and a second heat exchanger are arranged inside the heat exchanger; the first heat exchanger and the second heat exchanger are stacked up and down to work, and the materials of the first heat exchanger and the second heat exchanger are thin stainless steel plates or thin aluminum plates. The exhaust gas passes through the first heat exchanger and the second heat exchanger from bottom to top respectively. The fresh air is filtered through the filter and blown into the second heat exchanger from left to right, and then blown out through the right to left channel of the first heat exchanger. The fresh air absorbs heat energy through the first heat exchanger and the second heat exchanger.

[0006] Preferably, the heat exchanger is arranged on the top of the oven, and the waste gas inlet at the bottom of the heat exchanger box is connected to the waste gas outlet of the oven; the fresh air outlet at the bottom of the heat exchanger box is connected to the fresh air outlet of the oven.

[0007] Preferably, several heat exchangers on the production line are centrally controlled by an energy efficiency control device.

[0008] Preferably, the energy efficiency control device finds through calculation that the exchange energy efficiency is lower than the set value, and automatically starts the purge program to purge and clean the attachments on the heat exchange plate.

[0009] Preferably, a movable door is provided on the front face of the box body, and a rear movable door is provided on the rear face of the box body, and the movable door and the rear movable door are symmetrically arranged. A track is provided between the heat exchanger and the box body. When the two doors are opened, the heat exchange plates of the heat exchanger can be pulled out for cleaning.

[0010] Beneficial Effects Based on the above technical solution, the heat exchange metering and energy-saving device of the immersion machine of the present invention has at least one of the following beneficial effects: 1. Reasonable structure, short cost recovery period, obvious effect, heat exchange efficiency can reach more than 38%, effectively avoiding heat waste and effectively ensuring the service life of the heat exchanger; 2. The fresh air fan is surrounded by a filter, and the filter area is several times the fresh air area, so the filter can be cleaned for a long time, saving maintenance costs and labor maintenance intensity; 3. The structure is compact and small, and the heat exchange box is located just above the exhaust port of the oven. When installing it, the production line needs little change, saving time and effort; 4. The heat exchange box is located just above the exhaust port of the oven and is in close contact with the oven. The exhaust gas directly enters the heat exchange box, and the hot air also directly enters the oven, eliminating heat loss in the pipeline and greatly improving energy saving efficiency; 5. The structure is ingenious and simple, and the computer automatically controls the automatic purge and cleaning; open the two doors, pull out the heat exchanger for manual cleaning, easy maintenance, saving maintenance costs and manual maintenance intensity; 6. The hot air outlet is equipped with a valve. The main control computer communicates with the gas meter in real time to read the instantaneous and cumulative gas flow. The ambient temperature, hot air temperature, hot exhaust gas temperature, low-temperature exhaust gas temperature, exhaust gas pressure, and exhaust gas flow are transmitted to the main control computer in real time. The thermal efficiency and thermal energy consumption can be automatically calculated, and the energy saving benefits can be displayed in real time. The main control computer determines in real time whether the fan speed and main exhaust speed of each temperature zone of the production line are reasonable, and recommends more appropriate values ​​to assist technical personnel in energy management. 7. In a limited space, the heat exchanger is stacked twice, which can fully exchange heat and increase the hot air temperature, further improving efficiency; 8. It can automatically calculate thermal efficiency and thermal energy consumption, and display the energy saving benefits in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a working schematic diagram of a heat exchange metering and energy-saving device for an impregnation machine according to the present invention.

[0012] Figure 2 It is a structural diagram of a purification device of a heat exchange metering and energy-saving device of an immersion machine according to the present invention.

[0013] Figure 3 It is a schematic diagram of an energy efficiency control device of a heat exchange metering and energy-saving device of an impregnation machine according to the present invention.

[0014] Figure 4 It is a box structure diagram of a heat exchange metering and energy-saving device for an immersion machine according to the present invention.

[0015] Figure 5 The present invention is a structural diagram of an oven and a heat exchanger installation of a heat exchange metering and energy-saving device for an impregnation machine.

[0016] Main accessories symbol description 1-heat exchanger; 2-box; 3-fresh air inlet; 4-fan; 5-frame; 6-filter; 7-exhaust gas inlet; 8-fresh air outlet; 9-exhaust gas outlet; 10-movable door; 11-rear movable door; 21-purification device; 22-jet pipe group; 23-jet hole; 24-heat exchange plate; 25-solenoid valve; 31-energy efficiency control device; 32-temperature control sensor; 36-first flow pressure sensor; 37-control valve; 38-second flow pressure sensor; 39-oven; 40-first heat exchanger; 41-second heat exchanger. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0018] like Figure 1As shown, a heat exchange metering and energy-saving device for an impregnation machine includes a heat exchanger 1, a purification device 21 and an energy efficiency control device 31. A fresh air inlet 3 is arranged on the upper left side of the box body 2 of the heat exchanger 1, and a fan 4 is arranged on the fresh air inlet 3; the box body 2 outside the fan 4 is a frame 5 structure, and a detachable and cleanable filter 6 is arranged on the four vents of the frame 5. An exhaust gas inlet 7 is arranged at the bottom of the box body 2, a fresh air outlet 8 is arranged on the left side of the exhaust gas inlet 7, and an exhaust gas outlet 9 is arranged at the top of the box body 2. Figure 2 As shown, the jet pipe group 22 of the purification device 21 is arranged at the top or bottom of the heat exchanger 1, and the air pipe of the jet pipe group 22 is provided with a jet hole 23, and the jet hole 23 sprays high-pressure air to purge and clean the exhaust gas channel of the heat exchange plate 24; the jet pipe group 22 is controlled by the electromagnetic valve 25. Figure 3 As shown, the first flow pressure sensor 36 of the energy efficiency control device 31 is arranged on the exhaust gas outlet 9; the second flow pressure sensor 38 of the energy efficiency control device 31 is arranged on the fresh air outlet 8; the control valve 37 of the energy efficiency control device is arranged on the fresh air outlet 8; the four temperature control sensors 32 of the energy efficiency control device 31 are respectively arranged on the fresh air inlet 3, the fresh air outlet 8, the exhaust gas inlet 7 and the exhaust gas outlet 9. The energy efficiency control device 31 automatically adjusts the air volume of the fan 4 according to the production process and energy-saving needs and calculates the best energy-saving operation program to ensure the heat exchange efficiency. Under the conditions of the same production process, the same product, the same output, and the same time period, the control valve 37 and the fan 4 of the hot air outlet are opened and closed respectively, and the energy-saving efficiency calculated by the main control model and the actual energy consumption savings can be proofread and verified. In actual testing, the energy-saving efficiency and energy consumption savings calculated by the main control model can be accurate to within 0.2% of the actual measurement error. Figure 3 As shown, a first heat exchanger 40 and a second heat exchanger 41 are provided in the heat exchanger 1; the first heat exchanger 40 and the second heat exchanger 41 are stacked on top of each other for operation, and the materials of the first heat exchanger 40 and the second heat exchanger 41 are thin stainless steel plates or thin aluminum plates. Exhaust gas passes through the first heat exchanger 40 and the second heat exchanger 41 from bottom to top respectively. Fresh air is filtered through the filter 5 and then blown from left to right into the second heat exchanger 41, and then blown out through the right to left channel of the first heat exchanger 40. The fresh air absorbs heat energy through the first heat exchanger 40 and the second heat exchanger 41. The energy efficiency control device 31 finds through calculation that the exchange energy efficiency is lower than the set value, and automatically starts the purge program to purge and clean the attachments on the heat exchange plate 24. As shown Figure 4 As shown, a movable door 10 is provided on the front face of the box body 2, and a rear movable door 11 is provided on the rear face of the box body 2, and the movable door 10 and the rear movable door 11 are symmetrically arranged. A track is arranged between the heat exchanger 1 and the box body 2. When the two doors are opened, the heat exchange plate of the heat exchanger 1 can be pulled out for cleaning.

[0019] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heat exchange metering and energy-saving device for an immersion machine, characterized in that: include: A heat exchanger (1), wherein a fresh air inlet (3) is arranged on the upper left side of a housing (2); a fan (4) is arranged on the fresh air inlet (3); the housing (2) outside the fan (4) is a frame (5) structure; four ventilation openings of the frame (5) are provided with detachable and washable filter screens (6); an exhaust gas inlet (7) is arranged at the bottom of the housing (2); a fresh air outlet (8) is arranged on the left side of the exhaust gas inlet (7); and an exhaust gas outlet (9) is arranged at the top of the housing (2); A purification device (21), wherein the jet pipe group (22) is arranged at the top or bottom of the heat exchanger (1); the air pipe of the jet pipe group (22) is provided with a jet hole (23), and the high-pressure air in the jet hole (23) is used to purge and clean the exhaust gas channel of the heat exchange plate (24); the jet pipe group (22) is controlled to work by an electromagnetic valve (25); An energy efficiency control device (31), wherein a flow pressure sensor (36) is arranged on the exhaust gas outlet (9), a first flow pressure sensor (38) is arranged on the fresh air outlet (8), a second flow pressure sensor (36) is arranged on the fresh air outlet (8), and a control valve (37) is arranged on the fresh air outlet (8); a valve (37) for a hot air outlet is arranged on the fresh air outlet (8); four temperature control sensors (32) of the energy efficiency control device (31) are arranged on the fresh air inlet (3), the fresh air outlet (8), the exhaust gas inlet (7) and the exhaust gas outlet (9), respectively; and the energy efficiency control device (31) automatically adjusts the air volume of the fan (4) according to production energy-saving needs and calculates an optimal energy-saving operation program to ensure heat exchange efficiency. Under the conditions of the same production process, the same product, the same output, and the same time period, the valve (37) and the fan (4) at the hot air outlet are opened and closed respectively, so that the energy-saving efficiency and the energy-saving benefits calculated by the main control model can be calibrated and verified. In actual testing, the energy-saving efficiency and the energy-saving benefits calculated by the main control model can be accurately within 0.2% of the actual measurement error.

2. A heat exchange metering and energy-saving device for an impregnation machine according to claim 1, characterized in that: The heat exchanger (1) is provided with a first heat exchanger (40) and a second heat exchanger (41), both of which are plate-type heat exchangers, and the exhaust gas channel and the fresh air channel intersect with each other; the first heat exchanger (40) and the second heat exchanger (41) are stacked up and down for operation, and the materials of the first heat exchanger (40) and the second heat exchanger (41) are thin stainless steel plates or thin aluminum plates; the exhaust gas passes through the first heat exchanger (40) and the second heat exchanger (41) from bottom to top respectively; the fresh air is filtered by the filter screen (5) and then blown from left to right into the second heat exchanger (41), and then blown out through the right to left channel of the first heat exchanger (40), and the fresh air absorbs heat energy through the first heat exchanger (40) and the second heat exchanger (41).

3. A heat exchange metering and energy-saving device for an impregnation machine according to claim 1, characterized in that: The heat exchanger (1) is arranged at the top of the oven, and the waste gas inlet (7) at the bottom of the box body (2) of the heat exchanger (1) is communicated with the waste gas outlet of the oven; the fresh air outlet (8) at the bottom of the box body (2) of the heat exchanger (1) is communicated with the fresh air outlet of the oven.

4. A heat exchange metering and energy-saving device for an impregnation machine according to claim 3, characterized in that: The plurality of heat exchangers (1) on the production line are centrally controlled by an energy efficiency control device (31).

5. A heat exchange metering and energy-saving device for an impregnation machine according to claim 1, characterized in that: The energy efficiency control device (31) detects through calculation that the exchange energy efficiency is lower than a set value, and automatically starts a purge program to purge and clean the attachments on the heat exchange plate (24).

6. A heat exchange metering and energy-saving device for an impregnation machine according to claim 1, characterized in that: A movable door (10) is arranged on the front end surface of the box body (2), and a rear movable door (11) is arranged on the rear end surface of the box body (2), wherein the movable door (10) and the rear movable door (11) are arranged symmetrically; a track is arranged between the heat exchanger (1) and the box body (2); when the two doors are opened, the heat exchange plate of the heat exchanger (1) can be pulled out for cleaning.

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