Print drying hot air circulation device

Abstract

The utility model relates to a printing drying hot -blast circulation device, including main circulation fan, heating component, air supply interface and return air interface, and the return air interface and the air inlet end of main circulation fan between link to each other and are provided with return air passage, and the air supply interface and the air outlet end of main circulation fan between link to each other and are provided with air supply passage, and heating component sets up in air supply passage, and heating component is located between the air outlet end of main circulation fan and air supply interface. It can be matched for printing equipment (such as gravure etc.) to form hot -blast supply and recovery, and cooperate with the printing drying of printing material, wherein the temperature of gas (hot -blast) is maintained through the circulation and heating of air path, and the hot -blast formed by gas circulation is ensured to print and dry printing material successfully, wherein, the hot -blast after completing drying can be recycled and utilized, and the output supply is heated nearby, and it is relatively efficient, energy -conserving, and the air path closed loop is realized by installing and connecting to printing equipment conveniently.

Description

Technical Field

[0001] This utility model relates to a hot air circulation device for printing drying. Background Technology

[0002] After printing equipment completes printing on the substrate at the printing station, the substrate usually needs to be dried to ensure good adhesion of the printing ink. Hot air drying is a good way to achieve this. The airflow is heated by the heating element to form hot air, which is then transported to the drying device to dry the printed substrate. Efficient use of hot air can save energy, reduce consumption, and reduce carbon emissions.

[0003] In addition, the hot air drying of the printed substrate will also produce some waste gas containing volatile organic compounds, which will cause secondary pollution to the substrate and even accelerate printing quality problems such as aging, discoloration, stickiness, and odor. Utility Model Content

[0004] In view of the technical problems existing in the background art, the present invention aims to provide a relatively efficient and energy-saving printing drying hot air circulation device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a printing drying hot air circulation device, comprising a main circulation fan, a heating component, an air supply interface, and a return air interface, characterized in that: a return air channel is provided between the return air interface and the air inlet of the main circulation fan, an air supply channel is provided between the air supply interface and the air outlet of the main circulation fan, and the heating component is disposed in the air supply channel, the heating component being located between the air outlet of the main circulation fan and the air supply interface.

[0006] The following optimizations or supplementary explanations can be made to the above technical solutions.

[0007] For example, the return air interface is used to connect to the return air port of the hot air printing and drying device in the printing equipment, and the supply air interface is used to connect to the air inlet of the hot air printing and drying device in the printing equipment.

[0008] For example, the heating element includes an electric heating element, which is a mature existing heating technology.

[0009] The return air interface and the air supply interface can each be equipped with a corresponding air volume regulating valve.

[0010] In addition, an exhaust bypass auxiliary channel is connected between the return air channel and the supply air channel. A bypass exhaust auxiliary circulation fan is installed on the exhaust bypass auxiliary channel, and a gas purification treatment device is connected in series on the exhaust bypass auxiliary channel.

[0011] The bypass auxiliary channel can also be equipped with an air volume regulating valve.

[0012] For example, the gas purification and treatment device uses an RCO / RTO tail gas treatment device, which is a mature existing tail gas treatment technology.

[0013] The bypass exhaust auxiliary circulation fan is located before the gas purification treatment device, and the gas purification treatment device is located downstream of the bypass exhaust auxiliary circulation fan on the exhaust bypass auxiliary channel. The gas purification treatment device is connected to a heat exchanger.

[0014] In addition, the return air duct includes a return air box, the supply air duct includes a supply air box, the heating components are distributed in the supply air box, and the exhaust bypass auxiliary duct connects the return air box and the supply air box.

[0015] The beneficial effects of this utility model are that the printing drying hot air circulation device can be used in printing equipment (such as gravure printing) to form a hot air supply and recovery system to cooperate with the printing drying of the substrate. The gas (hot air) temperature is maintained by circulating the air and heating it to ensure that the hot air formed by the gas circulation can smoothly dry the substrate. The hot air after drying can be recovered and reused, heated and output locally, which is relatively efficient and energy-saving. It is also convenient to install and connect to the printing equipment to achieve a closed-loop airflow. Attached Figure Description

[0016] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a front structural diagram of the printing drying hot air circulation device in this utility model.

[0019] Figure 3 for Figure 2 A three-dimensional schematic diagram.

[0020] Figure 4 for Figure 3 A 3D diagram of the back.

[0021] In the picture: 2. Hot air printing and drying device; 24. Air inlet; 26. Air return outlet; 5. Main circulating fan; 51. Air inlet; 52. Air outlet; 6. Heating components; 7. Air supply interface; 70. Air supply duct; 71. Air supply box; 8. Return air interface; 80. Return air duct; 81. Return air box; 9. Exhaust bypass auxiliary channel; 90. Bypass exhaust auxiliary circulating fan; 91. Gas purification and treatment device. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Referring to the accompanying drawings, the printing drying hot air circulation device in this embodiment can be used in conjunction with printing equipment to participate in the drying of the printed substrate. It includes a main circulation fan 5, a heating component 6, an air supply interface 7, and a return air interface 8.

[0024] The main circulating fan 5 has an air inlet 51 and an air outlet 52.

[0025] A return air channel 80 is provided between the return air interface 8 and the air inlet 51 of the main circulation fan 5, that is, the air inlet 51 of the main circulation fan 5 and the return air channel 80 are connected and connected, and the return air channel 80 is connected to the return air interface 8.

[0026] An air supply channel 70 is provided between the air supply interface 7 and the air outlet 52 of the main circulation fan 5, that is, the air outlet 52 of the main circulation fan 5 is connected to the air supply channel 70, and the air supply channel 70 is connected to the air supply interface 7.

[0027] The heating component 6 is installed in the air supply channel 70, and is located between the air outlet 52 of the main circulating fan 5 and the air supply interface 7.

[0028] The working principle is as follows: During the operation of the main circulating fan 5, gas is drawn in from the return air interface 8 through the return air channel 80 and the air inlet 51. After passing through the main circulating fan 5, the gas is then output from the air supply interface 7 through the air outlet 52 and the air supply channel 70, thus achieving air circulation. The gas output by the main circulating fan 5 is heated by the heating component 6 in the air supply channel 70 and then output from the air supply interface 7 (to be supplied to the drying device in the printing equipment). The heated gas can be output nearby, resulting in relatively less heat loss, high efficiency, and energy saving. The return air interface 8 and the air supply interface 7 are convenient for connecting to the hot air printing drying device 2 of the printing equipment, making it easy to use and achieving a closed-loop air circulation.

[0029] This printing drying hot air circulation device can be used in printing equipment (such as gravure printing) to form a hot air supply and recovery system to assist in the printing and drying of the substrate. The system maintains the gas (hot air) temperature by circulating and heating the air through the air path, ensuring that the hot air generated by the gas circulation can smoothly dry the substrate. The system can also recover and reuse the dried hot air, heat it locally and supply it, which is relatively efficient and energy-saving. It is also easy to install and connect to the printing equipment to achieve a closed-loop air path.

[0030] Based on the above embodiments, the following optimizations or further explanations can be made.

[0031] For example, the return air interface 8 is used to connect to the return air inlet 26 of the hot air printing drying device 2 in the printing equipment, and can usually be connected and installed using an air duct (such as a flexible hose); the supply air interface 7 is used to connect to the air inlet 24 of the hot air printing drying device 2 in the printing equipment, and can usually be connected and installed using an air duct (such as a flexible hose). This facilitates installation and connection to the hot air printing drying device 2 in the printing equipment, achieving a closed-loop airflow. It can supply hot air to the hot air printing drying device 2 and recover the dried hot air from the hot air printing drying device 2 back to the printing drying hot air circulation device.

[0032] Among them, the heating component 6 includes an electric heating tube (such as a finned heating tube), which is a relatively mature technology.

[0033] Furthermore, optimization is possible by connecting an exhaust bypass auxiliary channel 9 between the return air channel 80 and the supply air channel 70. This additionally connects the return air channel 80 and the supply air channel 70 to form an auxiliary air path for circulation. The exhaust bypass auxiliary channel 9 is equipped with a bypass exhaust auxiliary circulation fan 90, and a gas purification device 91 is connected in series with it for purifying the gas in the bypass auxiliary channel. The bypass exhaust auxiliary circulation fan, in conjunction with the exhaust bypass auxiliary circulation fan, directly transports a portion of the gas in the return air channel 80 to the supply air channel 70 via the exhaust bypass auxiliary channel 9. Some of the gas can be purified, including the hot air gas used for drying the printed substrate. This purification process reduces the amount of volatile organic compounds in the gas, preventing them from affecting the printing quality. Furthermore, since only a portion of the gas is circulated for exhaust to form an auxiliary air path and undergoes purification, the impact on the air volume and speed of the main circulating fan 5 during operation is minimal, as is the impact on hot air drying. Moreover, this purified gas is returned to the air supply channel 70 to replenish the gas volume, thus avoiding energy loss and reducing energy consumption.

[0034] The return air inlet 8 and the supply air inlet 7 are each equipped with a corresponding airflow regulating valve; an airflow regulating valve is also provided on the bypass auxiliary channel. This allows for adjustment of the airflow as needed, and the airflow adjustment is convenient and does not affect the position of other structures. The airflow regulating valve can be a butterfly valve.

[0035] The gas purification and treatment device 91 (typically including a heating element) can be an RCO / RTO tail gas treatment device, which has relatively mature technology. Furthermore, it utilizes the heating of the purified gas during the tail gas treatment process to increase the gas temperature. This heated and purified gas is then returned to the air supply duct 70 to participate in the air circulation, resulting in greater energy savings. For example, the gas purification and treatment device 91 is connected to a heat exchanger to heat the gas in conjunction with purification.

[0036] For example, the bypass exhaust auxiliary circulation fan 90 is located before the gas purification treatment device 91. The gas purification treatment device 91 is located downstream of the bypass exhaust auxiliary circulation fan 90 on the exhaust bypass auxiliary channel 9. When the gas runs from the return air channel 80 through the exhaust bypass auxiliary channel 9 to the air supply channel 70, the gas first passes through the bypass exhaust auxiliary circulation fan 90 and then through the gas purification treatment device 91, making the gas delivery smoother.

[0037] The return air duct 80 includes a return air box 81, and return air interfaces 8 can be connected and installed on the return air box 81. Multiple (e.g., two) return air interfaces 8 can be installed. The supply air duct 70 includes a supply air box 71, and supply air interfaces 7 can be connected and installed on the supply air box 71. Multiple (e.g., two) supply air interfaces 7 can be installed. The heating components 6 are distributed in the supply air box 71 for easy arrangement. The exhaust bypass auxiliary duct 9 connects the return air box 81 and the supply air box 71, with a reasonable position for easy connection and installation. The return air box 81 and the supply air box 71 also facilitate uniform air mixing.

Claims

1. A printing drying hot air circulation device, comprising a main circulating fan (5), a heating element (6), an air supply interface (7), and a return air interface (8), characterized in that: A return air channel (80) is provided between the return air interface (8) and the air inlet (51) of the main circulating fan (5). An air supply channel (70) is provided between the air supply interface (7) and the air outlet (52) of the main circulating fan (5). The heating element (6) is installed in the air supply channel (70) and is located between the air outlet (52) of the main circulating fan (5) and the air supply interface (7).

2. The printing drying hot air circulation device as described in claim 1, characterized in that: The return air interface (8) is used to connect to the return air port (26) of the hot air printing drying device (2) in the printing equipment. The air supply interface (7) is used to connect to the air inlet (24) of the hot air printing drying device (2) in the printing equipment.

3. The printing drying hot air circulation device as described in claim 1, characterized in that: The heating element (6) includes an electric heating tube.

4. The printing drying hot air circulation device as described in claim 1, characterized in that: The return air interface (8) and the supply air interface (7) are respectively equipped with corresponding air volume regulating valves.

5. The printing drying hot air circulation device as described in claim 1, characterized in that: An exhaust bypass auxiliary channel (9) is also connected between the return air channel (80) and the air supply channel (70). A bypass exhaust auxiliary circulating fan (90) is installed on the exhaust bypass auxiliary channel (9), and a gas purification treatment device (91) is connected in series on the exhaust bypass auxiliary channel (9).

6. The printing drying hot air circulation device as described in claim 5, characterized in that: The bypass auxiliary channel is equipped with an air volume regulating valve.

7. The printing drying hot air circulation device as described in claim 5, characterized in that: The gas purification and treatment device (91) adopts an RCO / RTO tail gas treatment device.

8. The printing drying hot air circulation device as described in claim 5, characterized in that: The bypass exhaust auxiliary circulation fan (90) is located before the gas purification treatment device (91). The gas purification treatment device (91) is located downstream of the bypass exhaust auxiliary circulation fan (90) on the exhaust bypass auxiliary channel (9). The gas purification treatment device (91) is connected to a heat exchanger.

9. The printing drying hot air circulation device as described in claim 5, characterized in that: The return air duct (80) includes a return air box (81). The air supply duct (70) includes an air supply box (71), and the heating components (6) are distributed in the air supply box (71). The exhaust bypass auxiliary channel (9) is connected between the return air box (81) and the supply air box (71).

Images