Waste heat recovery system in printing workshop

Abstract

This utility model discloses a waste heat recovery and utilization system for a printing workshop, including: a centralized pipe; and a connecting pipe, which is set on one side of the centralized pipe. The beneficial effects of this utility model are: by setting a worm, a worm wheel, and a rotating rod, the output end of the motor drives the worm to rotate, the worm drives the meshing worm wheel to rotate, and the worm wheel drives the rotating disk and scraper to rotate through the inner rotating rod. The scraper scrapes away the impurities filtered on one side of the filter screen, avoiding the accumulation of impurities on the filter screen and affecting the ventilation efficiency. The impurities are cleaned after the bottom sealing box is disassembled. By setting an exhaust pipe, a ventilation duct, and heat exchange fins, hot air enters the first branch pipe through the branch pipe, enters the exhaust pipe through the first branch pipe, and is conducted through the heat exchange fins in the exhaust pipe. The ventilation duct is connected to the printing workshop.

Description

Technical Field

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

[0002] In the printing industry, the operation of equipment in printing workshops generates a significant amount of waste heat. For example, during the printing process, the motors, ink heating systems, and drying devices of printing presses continuously generate heat; drying equipment, such as heat pipe heat exchangers and plate heat exchangers, exhausts air containing a large amount of heat during operation; UV curing equipment uses ultraviolet light to rapidly cure ink, and the UV lamps and ink curing process also release considerable heat. If this waste heat is not recovered and utilized, it will not only waste energy but also cause the ambient temperature in the workshop to rise, affecting the normal operation of equipment and the comfort of employees. However, during the waste heat collection process, the air often contains a large number of impurities, which easily adhere to the filter devices of the waste heat collection equipment, causing the filter devices to become clogged, severely affecting ventilation efficiency, and thus reducing the effectiveness of waste heat collection. Utility Model Content

[0003] The purpose of this invention is to provide a waste heat recovery and utilization system for printing workshops, in order to solve the problem mentioned in the background art that the air often contains a large number of impurities, which are easy to adhere to the filter device of the waste heat collection equipment, causing the filter device to become clogged, seriously affecting the ventilation efficiency, and thus reducing the effect of waste heat collection.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery and utilization system for printing workshops, comprising:

[0005] Centralized pipe;

[0006] A connecting pipe is installed on one side of a central pipe, which is connected to multiple exhaust fans via air ducts.

[0007] A filter box is fixed to one end of a connecting pipe, and a filter screen is installed inside the filter box.

[0008] A rotating disc is rotatably mounted on one side of a filter screen, and a scraper plate that cooperates with the filter screen is fixedly connected to the outer side of the rotating disc.

[0009] Bottom-sealed box, which is installed at the bottom of the filter box;

[0010] A rotating part is located on the side of the filter screen away from the rotating disk, and the rotating disk is connected to the rotating part;

[0011] The branch pipe is connected to the filter box via an air duct;

[0012] A first shunt pipe is fixed to one side of the shunt pipe, and multiple second shunt pipes are fixed to the other side of the shunt pipe.

[0013] An exhaust duct is fixed to one end of a first branch pipe. A ventilation duct is fixed to the top of the exhaust duct. Multiple heat exchange fins are installed inside the exhaust duct and the ventilation duct.

[0014] As a preferred embodiment of this utility model: the rotating part includes a side fixing box, which is fixedly connected to one side of the filter screen. A rotating rod is rotatably arranged inside the side fixing box. The rotating rod is rotatably connected to the filter screen. One end of the rotating rod is fixedly connected to the rotating disk. A worm gear is fixedly connected to the outside of the rotating rod. A worm is rotatably arranged inside the side fixing box. The worm is meshed with the worm gear and is rotatably connected to the filter box.

[0015] As a preferred embodiment of this utility model: a motor is installed on the top of the filter box, and the output end of the motor is fixedly connected to the worm gear.

[0016] As a preferred embodiment of this utility model: a sealing frame is fixedly connected to the top of the bottom sealed box, and a bottom sealing groove that cooperates with the sealing frame is opened at the bottom of the filter box.

[0017] As a preferred embodiment of this utility model, a protective net is installed at the input end of the exhaust fan.

[0018] As a preferred embodiment of this utility model, both the No. 1 and No. 2 diversion pipes are equipped with electrically controlled valves.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, by setting up a worm, a worm wheel, and a rotating rod, realizes that the output end of the motor drives the worm to rotate, the worm drives the meshing worm wheel to rotate, and the worm wheel drives the rotating disk and scraper to rotate through the inner rotating rod. The scraper scrapes away the impurities filtered on one side of the filter screen, avoiding the accumulation of impurities on the filter screen and affecting the ventilation efficiency. The bottom sealing box is disassembled to complete the cleaning of impurities. By setting up an exhaust pipe, ventilation duct, and heat exchange fins, hot air enters the first branch pipe through the branch pipe, and then enters the exhaust pipe through the first branch pipe. Heat is conducted through the heat exchange fins in the exhaust pipe. The ventilation duct is connected to the printing workshop, and the hot air generated by the recycled printing and drying equipment is introduced into the exhaust duct. The hot air transfers heat to the cold air in the ventilation duct through the heat exchange fins. In winter, the air entering through the ventilation duct is heated by the heat exchange fins before being sent into the workshop, which not only increases the workshop temperature but also reduces energy consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the exhaust pipe and ventilation duct structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the exhaust pipe and ventilation duct of this utility model;

[0023] Figure 4 This is a schematic diagram of the protective net structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the disassembly of the bottom sealing box of this utility model;

[0025] Figure 6 This is a schematic diagram of the filter screen structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the internal structure of the side fixing box of this utility model.

[0027] In the diagram: 1. Centralized pipe; 2. Protective net; 3. Exhaust fan; 4. Connecting pipe; 5. Filter box; 6. Diverter pipe; 7. Filter screen; 8. Rotating disc; 9. Scraper; 10. Side fixed box; 11. Rotating rod; 12. Worm gear; 13. Worm; 14. Motor; 15. Bottom sealed box; 16. Sealing frame; 17. Bottom sealing groove; 18. Diverter pipe No. 1; 19. Diverter pipe No. 2; 20. Exhaust pipe; 21. Ventilation duct; 22. Heat exchange fins; 23. Electrically controlled valve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 7This utility model provides a technical solution: a waste heat recovery and utilization system for a printing workshop, comprising: a central pipe 1; a connecting pipe 4 welded and fixed to one side of the central pipe 1, the central pipe 1 being connected to multiple exhaust fans 3 via air ducts; a filter box 5 welded and fixed to one end of the connecting pipe 4, the filter box 5 having a filter screen 7 fixedly connected inside; a rotating disc 8 rotatably disposed on one side of the filter screen 7, the outer side of the rotating disc 8 being welded and fixed with a scraper 9 that cooperates with the filter screen 7; a bottom sealing box 15 installed at the bottom of the filter box 5 by bolts; a rotating part placed on the side of the filter screen 7 away from the rotating disc 8, the rotating disc 8 being connected to the rotating part; a diversion pipe 6 connected to the filter box 5 via air ducts; a first diversion pipe 18 fixedly connected to one side of the diversion pipe 6, the other side of the diversion pipe 6 having multiple second diversion pipes 19 fixedly connected; an exhaust pipe 20 fixedly connected to one end of the first diversion pipe 18, the top of the exhaust pipe 20 having a ventilation duct 21 fixedly connected, the exhaust pipe 20 and the ventilation duct 21 having multiple heat exchange fins 22 installed inside.

[0030] It should be noted that in this embodiment, each exhaust fan 3 is connected to the connecting pipe 4 via a duct. The exhaust fans 3 are directed at the heat source of the printing press, the exhaust vent of the drying chamber, and the UV curing equipment. The heat source of the printing press includes the motor, ink heating system, and drying device, which generate a large amount of heat during operation. Exhaust fans 3 are installed at the exhaust vent of the drying equipment, such as heat pipe heat exchangers or plate heat exchangers, to recover the heat from the exhaust air. The UV curing equipment uses ultraviolet light to rapidly cure the ink. During the curing process, the ultraviolet lamps generate a large amount of heat, and the ink curing also releases some heat. The exhaust fans 3 collect and process the heat from these locations, and the hot air is then circulated through the exhaust pipe. The hot air enters the connecting pipe 4 through the central pipe 1, and then enters the filter box 5 through the connecting pipe 4. The hot air is filtered by the sealing frame 16 inside the filter box 5. The output of the motor 14 drives the worm gear 13 to rotate, which in turn drives the meshing worm wheel 12. The worm wheel 12, in turn, drives the inner rotating rod 11 to rotate and adjust. The rotating rod 11 drives the rotating disk 8 and the scraper 9 to rotate. The scraper 9 scrapes away impurities filtered from one side of the filter screen 7 to prevent severe blockage that could affect the ventilation efficiency of the filter screen 7, thus cleaning the filter screen 7. The collected hot air is then split into two streams: the first split pipe 18 and the second split pipe 19 on both sides of the split pipe 6. The process is controlled by an electronic system. Valve 23 controls ventilation. Hot air from the first branch pipe 18 enters the exhaust pipe 20 and is heated by the heat exchange fins 22 within the exhaust pipe 20. Ventilation duct 21 ventilates the printing workshop. The printing workshop needs to maintain a certain temperature in winter to ensure the normal operation of equipment and the comfort of employees. The air blown into the printing workshop from the ventilation duct 21 is heated by the heat exchange fins 22, providing a heat source for the workshop's heating system and reducing reliance on traditional heating equipment. Utilizing recovered waste heat to preheat the cold air entering the workshop reduces the impact of indoor and outdoor temperature differences on the workshop temperature. Heated air is supplied through the second branch pipe 19. During the printing process, ink preparation needs to be carried out at a certain temperature to ensure the performance and quality of the ink. The recovered waste heat can be used to preheat the raw materials required for ink preparation, reducing energy consumption. The recovered waste heat is transferred to the ink preparation tank or ink raw material storage tank through a heat exchanger, so that the ink raw materials reach a suitable temperature before preparation. Cleaning of printing equipment requires the use of cleaning solvents. In low-temperature environments, the fluidity of cleaning solvents will decrease, and the cleaning effect will also be affected. Using the recovered waste heat to heat the cleaning solvent can improve cleaning efficiency and effect. Heating devices are installed in the cleaning solvent storage tank and cleaning equipment, and the recovered waste heat provides a heat source for the heating devices, keeping the cleaning solvent at a suitable temperature.

[0031] In one embodiment, such as Figure 6 and Figure 7As shown, the rotating part includes a side fixing box 10, which is fixedly connected to one side of the filter screen 7. A rotating rod 11 is rotatably arranged inside the side fixing box 10. The rotating rod 11 is rotatably connected to the filter screen 7. One end of the rotating rod 11 is fixedly connected to the rotating disk 8. A worm gear 12 is fixedly connected to the outside of the rotating rod 11. A worm 13 is rotatably arranged inside the side fixing box 10. The worm 13 is meshed with the worm gear 12 and is rotatably connected to the filter box 5.

[0032] It should be noted that in this embodiment, when the worm gear 13 rotates, it drives the meshing worm wheel 12 to rotate. When the worm wheel 12 rotates, it drives the inner rotating rod 11 to rotate and adjust. The rotating rod 11 drives the rotating disk 8 and the scraper 9 to rotate and adjust. The scraper 9 completes the scraping of impurities on one side of the filter screen 7.

[0033] In one embodiment, such as Figures 1 to 7 As shown, a motor 14 is installed on the top of the filter box 5, and the output end of the motor 14 is fixedly connected to the worm gear 13.

[0034] It should be noted that in this embodiment, the worm gear 13 is rotated and adjusted by the output end of the motor 14, and the rotation adjustment of the worm wheel 12 is completed by the worm gear 13.

[0035] In one embodiment, such as Figure 5 and Figure 6 As shown, a sealing frame 16 is fixed to the top of the bottom sealed box 15, and a bottom sealing groove 17 that cooperates with the sealing frame 16 is opened at the bottom of the filter box 5.

[0036] It should be noted that, in this embodiment, the sealing frame 16 at the top of the bottom sealing box 15 cooperates with the bottom sealing groove 17 at the bottom of the filter box 5 to seal the installation of the bottom sealing box 15.

[0037] In one embodiment, such as Figure 4 As shown, a protective net 2 is installed at the input end of the exhaust fan 3.

[0038] It should be noted that in this embodiment, the air inlet pipe of the exhaust fan 3 is protected by a protective net 2.

[0039] In one embodiment, such as Figures 1 to 4 As shown, both the first diversion pipe 18 and the second diversion pipe 19 are equipped with electrically controlled valves 23.

[0040] It should be noted that in this embodiment, ventilation is controlled by the electronically controlled valve 23 for the first diversion pipe 18 and the second diversion pipe 19.

[0041] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0042] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery and utilization system for a printing workshop, characterized in that, include: Centralized pipe (1); A connecting pipe (4) is provided on one side of a central pipe (1), and the central pipe (1) is connected to multiple exhaust fans (3) through a duct. A filter box (5) is fixed to one end of a connecting pipe (4), and a filter screen (7) is provided inside the filter box (5). A rotating disk (8) is rotatably disposed on one side of a filter screen (7), and a scraper (9) that cooperates with the filter screen (7) is fixedly connected to the outer side of the rotating disk (8). Bottom sealing box (15), the bottom sealing box (15) is installed at the bottom of the filter box (5); A rotating part is placed on the side of the filter screen (7) away from the rotating disk (8), and the rotating disk (8) is connected to the rotating part; The diversion pipe (6) is connected to the filter box (5) through the air duct; A first shunt pipe (18) is fixed to one side of a shunt pipe (6), and multiple second shunt pipes (19) are fixed to the other side of the shunt pipe (6). An exhaust pipe (20) is fixed to one end of a first branch pipe (18). A ventilation duct (21) is fixed to the top of the exhaust pipe (20). Multiple heat exchange fins (22) are installed inside the exhaust pipe (20) and the ventilation duct (21).

2. The waste heat recovery and utilization system for printing workshops according to claim 1, characterized in that: The rotating part includes a side fixing box (10), which is fixed to one side of the filter screen (7). A rotating rod (11) is rotatably arranged inside the side fixing box (10). The rotating rod (11) is rotatably connected to the filter screen (7). One end of the rotating rod (11) is fixed to the rotating disk (8). A worm gear (12) is fixed to the outside of the rotating rod (11). A worm (13) is rotatably arranged inside the side fixing box (10). The worm (13) is meshed with the worm gear (12). The worm (13) is rotatably connected to the filter box (5).

3. The waste heat recovery and utilization system for printing workshops according to claim 2, characterized in that: A motor (14) is installed on the top of the filter box (5), and the output end of the motor (14) is fixedly connected to the worm gear (13).

4. The waste heat recovery and utilization system for printing workshops according to claim 1, characterized in that: The top of the bottom sealed box (15) is fixed with a sealing frame (16), and the bottom of the filter box (5) is provided with a bottom sealing groove (17) that cooperates with the sealing frame (16).

5. The waste heat recovery and utilization system for printing workshops according to claim 1, characterized in that: The input end of the exhaust fan (3) is equipped with a protective net (2).

6. The waste heat recovery and utilization system for printing workshops according to claim 1, characterized in that: Both the No. 1 diversion pipe (18) and the No. 2 diversion pipe (19) are equipped with electrically controlled valves (23).

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