Drying equipment special for papermaking and capable of recycling waste heat
By designing special paper-making drying equipment for waste heat recovery and reuse, and using hot air recycling technology, the problems of poor drying effect and low heat utilization efficiency of existing equipment have been solved, and efficient paper drying and energy savings have been achieved.
Patent Information
- Application Number
- CN202420804616.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The existing paper-making drying equipment has poor drying effect and low heat utilization efficiency, so it is impossible to effectively utilize the heat in the discharged hot gas.
A special paper-making drying equipment for recycling waste heat is designed, using components such as hot air fans, air supply ducts, upper drying trays, lower drying trays, thermal conductive layer and air holes. Through hot air recycling, uniform drying of the surface and bottom of the paper is achieved.
It improves the drying effect and achieves uniform drying of the surface and bottom of the paper, while effectively recycling and utilization of waste heat and saving energy.
Smart Images
Figure CN222796085U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to drying equipment, in particular to drying equipment special for papermaking which can recover and reuse waste heat. Background Art
[0002] Papermaking is an important invention of the working people in ancient China. It is divided into two forms: machine-made and hand-made. The machine-made process is carried out continuously on a papermaking machine. The pulp suitable for paper quality is diluted with water to a certain concentration, and initially dehydrated on the mesh of the papermaking machine to form wet paper sheets, which are then pressed and dehydrated, and then dried into paper. The hand-made process uses a frame with a bamboo curtain, polyester mesh or copper mesh to copy the fibers suspended in the water into wet paper sheets, which are pressed and dehydrated, and then dried or dried into paper. The biggest difference between the machine-made and hand-made papers is that since hand-made paper uses manual pulping, the fibers in the pulp are well preserved, while machine-made paper uses machine pulping, and the pulp fibers are broken, making hand-made paper much better than machine-made paper in toughness and tensile strength. The machine-made paper has a pulp-net speed difference that leads to uneven longitudinal and transverse distribution of fibers, while the hand-made paper does not have uneven longitudinal and transverse distribution of fibers, which is particularly reflected in Xuan paper used for calligraphy and painting. Paper is one of the indispensable items in human daily life, so the demand for paper is huge, and the paper usually needs to be dried during the papermaking process.
[0003] However, most of the dryers commonly used at present have poor drying effects. The moisture on the side of the paper close to the conveyor belt is difficult to evaporate, which affects the drying effect. In addition, the heat utilization efficiency of paper drying equipment is also low, and the heat in the exhausted hot air cannot be utilized. Utility Model Content
[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a special papermaking drying equipment for waste heat recovery and reuse, which effectively solves the problem that most of the commonly used dryers have poor drying effect, the moisture on the side of the paper close to the conveyor belt is difficult to evaporate, affecting the drying effect, and the heat utilization efficiency of the papermaking drying equipment is also low, and the heat in the discharged hot air cannot be utilized.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the utility model includes a casing arranged outside, a feed port arranged in the middle of one end of the casing, a discharge port arranged in the middle of the other end of the casing, and a conveyor belt installed inside the casing, and also includes a drying component, a heat-conducting layer and air holes, and the drying component is installed inside the casing;
[0006] The drying component includes a hot air blower, an air supply pipe, a branch pipe, an upper drying plate, a lower drying plate, air outlet holes, a mounting frame, a connecting pipe, an air suction plate, a return pipe, an exhaust pump, an air inlet pipe and a one-way valve. The hot air blower is installed in the middle of the top of the casing. An air supply pipe is provided on one side of the hot air blower. Two branch pipes are connected to the air supply pipe. The upper drying plate is installed on the branch pipe at one end of the air supply pipe. The lower drying plate is installed at the bottom end of the other branch pipe on the air supply pipe. Several air outlet holes are provided at the bottom end of the upper drying plate and the top end of the lower drying plate. An air suction plate is installed at the top of one end inside the casing. The top of the air suction plate is connected to the return pipe, and the air inlet of the hot air blower is connected to the air inlet pipe.
[0007] Preferably, a mounting frame is provided at one end of the lower drying tray, and the mounting frame is fixed on the casing.
[0008] Preferably, a connecting pipe connected to the branch pipe is provided in the middle of one end of the lower drying tray.
[0009] Preferably, an exhaust pump is installed on the return pipe.
[0010] Preferably, a one-way valve is installed on the air inlet pipe.
[0011] Preferably, the outer surface of the conveyor belt is a heat-conducting layer, and the inner surface of the conveyor belt is provided with air holes.
[0012] Beneficial effect: When the utility model is used, the paper to be dried is transported by the conveyor belt. When passing under the upper drying plate, the hot air blower works to transport the hot air to the upper drying plate through the air supply pipe and the branch pipe, and the hot air is discharged through the air outlet on the upper drying plate, thereby drying the upper surface of the paper. When moving to the top of the lower drying plate, the hot air blower works to transport the hot air to the lower drying plate through the air supply pipe and the branch pipe, and the hot air is discharged through the air outlet on the lower drying plate. The discharged hot air enters the air hole, and the heat is transferred to the bottom of the paper to be dried through the heat conductive layer, so that the bottom of the paper can be dried. The used drying air is transported to the return pipe by the suction plate through the exhaust pump, and enters the air inlet pipe through the return pipe to be used by the hot air blower. In this way, the hot air blower can heat the air with less energy consumption, which is convenient for recycling the waste heat of the hot air. The utility model has a novel structure and an ingenious conception. It is convenient for drying the paper to be dried, and can dry the surface and bottom of the paper. The drying effect is good. At the same time, the waste heat can be recycled to save energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is a bottom view of the upper drying plate of the utility model;
[0016] Figure 3 This is a top view of the lower drying plate of the utility model;
[0017] Figure 4 It is a cross-sectional view of the conveyor belt of the utility model;
[0018] Numbers in the figure: 1. Casing; 2. Feed inlet; 3. Discharge outlet; 4. Conveyor belt; 5. Drying component; 6. Hot air blower; 7. Air supply duct; 8. Branch pipe; 9. Upper drying plate; 10. Lower drying plate; 11. Air outlet; 12. Mounting frame; 13. Connecting pipe; 14. Suction plate; 15. Return pipe; 16. Exhaust pump; 17. Air inlet duct; 18. One-way valve; 19. Heat transfer layer; 20. Air hole. DETAILED DESCRIPTION
[0019] The following is combined with Figure 1-4 The specific implementation modes of the present utility model are further described in detail.
[0020] Embodiment 1, by Figure 1-4 The utility model provides a papermaking drying device for waste heat recovery and reuse, comprising a casing 1 arranged outside, a feed port 2 arranged in the middle of one end of the casing 1, a discharge port 3 arranged in the middle of the other end of the casing 1, and a conveyor belt 4 installed inside the casing 1, and also comprising a drying component 5, a heat-conducting layer 19 and air holes 20, and the drying component 5 is installed inside the casing 1;
[0021] The drying assembly 5 includes a hot air blower 6, an air supply pipe 7, a branch pipe 8, an upper drying plate 9, a lower drying plate 10, an air outlet 11, a mounting frame 12, a connecting pipe 13, an air suction plate 14, a return pipe 15, an exhaust pump 16, an air inlet pipe 17 and a one-way valve 18. The hot air blower 6 is installed in the middle of the top of the casing 1. An air supply pipe 7 is provided on one side of the hot air blower 6. Two branch pipes 8 are connected to the air supply pipe 7. The upper drying plate 9 is installed on the branch pipe 8 at one end of the air supply pipe 7. The lower drying plate 10 is installed at the bottom end of the other branch pipe 8 on the air supply pipe 7. A plurality of air outlets 11 are provided at the bottom end of the upper drying plate 9 and the top end of the lower drying plate 10. An air suction plate 14 is installed at the top of one end inside the casing 1. The top of the air suction plate 14 is connected to the return pipe 15, and the air inlet of the hot air blower 6 is connected to the air inlet pipe 17.
[0022] Specific use: When the utility model is used, the paper to be dried is transported by the conveyor belt 4. When passing under the upper drying plate 9, the hot air blower 6 works to transport the hot air to the upper drying plate 9 through the air supply pipe 7 and the branch pipe 8, and the hot air is discharged through the air outlet 11 on the upper drying plate 9, so as to dry the upper surface of the paper. When moving to the top of the lower drying plate 10, the hot air blower 6 works to transport the hot air to the lower drying plate 10 through the air supply pipe 7 and the branch pipe 8, and the hot air is discharged through the air outlet 11 on the lower drying plate 10. The discharged hot air enters the air hole 20, and the heat is transferred to the bottom of the paper to be dried through the heat conductive layer 19, so that the bottom of the paper can be dried. The used dry air is transported to the return pipe 15 by the suction plate 14 through the exhaust pump 16, and enters the air inlet pipe 17 through the return pipe 15 for use by the hot air blower 6. In this way, the hot air blower 6 can heat the wind with little energy consumption, which is convenient for recycling the waste heat of the hot air.
[0023] Beneficial effects: The utility model has a novel structure and an ingenious conception, is convenient for drying the paper to be dried, and can dry the surface and bottom of the paper with good drying effect. At the same time, waste heat can be recycled to save energy.
[0024] Embodiment 2
[0025] In the first embodiment, the lower drying plate 10 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a mounting bracket 12 is provided at one end of the lower drying tray 10, and the mounting bracket 12 is fixed on the casing 1 to facilitate the installation and use of the lower drying tray 10.
[0026] Embodiment 3
[0027] In the first embodiment, the lower drying plate 10 is inconvenient to connect and use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a connecting pipe 13 connected to the branch pipe 8 is provided in the middle of one end of the lower drying tray 10 to facilitate the connection and use of the lower drying tray 10.
[0028] Embodiment 4
[0029] In the first embodiment, the reflux pipe 15 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that an exhaust pump 16 is installed on the return pipe 15 to facilitate the exhaust of the return pipe 15.
[0030] Embodiment 5
[0031] In the first embodiment, the air inlet pipe 17 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that a one-way valve 18 is installed on the air inlet pipe 17 to facilitate the use of the air inlet pipe 17.
[0032] Embodiment 6
[0033] In the first embodiment, the conveyor belt 4 is inconvenient to use. Figure 1 As another preferred embodiment, the difference from the first embodiment is that the outer surface of the conveyor belt 4 is a heat-conducting layer 19 , and the inner surface of the conveyor belt 4 is provided with air holes 20 to facilitate the use of the conveyor belt 4 .
[0034] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A papermaking drying device for waste heat recovery and reuse, comprising a casing (1) arranged outside, a feed port (2) arranged in the middle of one end of the casing (1), a discharge port (3) arranged in the middle of the other end of the casing (1), and a conveyor belt (4) installed inside the casing (1), characterized in that: It also comprises a drying component (5), a heat-conducting layer (19) and air holes (20), and the drying component (5) is installed inside the housing (1); The drying assembly (5) comprises a hot air blower (6), an air supply pipe (7), a branch pipe (8), an upper drying plate (9), a lower drying plate (10), an air outlet (11), a mounting frame (12), a connecting pipe (13), an air suction plate (14), a return pipe (15), an exhaust pump (16), an air inlet pipe (17) and a one-way valve (18). The hot air blower (6) is mounted at the middle of the top of the housing (1). An air supply pipe (7) is arranged on one side of the hot air blower (6). The air supply pipe (7) is connected to two A branch pipe (8), an upper drying plate (9) is installed on the branch pipe (8) at one end of the air supply pipe (7), a lower drying plate (10) is installed at the bottom end of another branch pipe (8) on the air supply pipe (7), a plurality of air outlet holes (11) are arranged at the bottom end of the upper drying plate (9) and the top end of the lower drying plate (10), an air suction plate (14) is installed at the top end of one end of the casing (1), a return pipe (15) is connected to the top end of the air suction plate (14), and an air inlet of the hot air blower (6) is connected to an air inlet pipe (17).
2. The papermaking drying equipment for waste heat recovery and reuse according to claim 1 is characterized in that: A mounting frame (12) is provided at one end of the lower drying tray (10), and the mounting frame (12) is fixed on the casing (1).
3. The papermaking drying equipment for waste heat recovery and reuse according to claim 1 is characterized in that: A connecting pipe (13) connected to the branch pipe (8) is provided in the middle of one end of the lower drying tray (10).
4. The papermaking drying equipment for waste heat recovery and reuse according to claim 1 is characterized in that: An air extraction pump (16) is installed on the return pipe (15).
5. The papermaking drying equipment for waste heat recovery and reuse according to claim 1 is characterized in that: A one-way valve (18) is installed on the air inlet pipe (17).
6. The papermaking drying equipment for waste heat recovery and reuse according to claim 1 is characterized in that: The outer surface of the conveyor belt (4) is a heat-conducting layer (19), and the inner surface of the conveyor belt (4) is provided with air holes (20).