Molding and thermal forming device for paper pulp

Abstract

The utility model provides a pulp molding thermal forming device which comprises a forming machine lower shell, a forming machine upper shell, a hydraulic system, a hot-pressing upper die heating system, a hot-pressing lower die heating system, a waste heat utilization system, a sliding table and a steam-water separation system. The waste heat utilization system has the beneficial effects that the plurality of heat exchangers in the heat exchange area are connected with the cold water inlet, the cold air inlet, the hot water outlet and the hot air outlet through the plurality of circulating inlet pipes and the plurality of circulating outlet pipes to form a cold part structure of the whole waste heat utilization system; the interior of the loading base is divided into two heat exchange areas to form a heat part structure of the whole waste heat utilization system; according to the waste heat utilization system, cold water and cold air can be synchronously heated, two heat sources of hot water and hot air are finally obtained, follow-up waste heat recycling is facilitated, and meanwhile energy waste and environmental pollution caused by direct steam discharging are effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulp molding equipment, in particular to a pulp molding thermoforming device. Background Art

[0002] In traditional pulp molding thermoforming, high-temperature water vapor generated during the drying process is ultimately discharged directly into the atmosphere through vacuum extraction. This vacuum extraction also causes some of the energy from the heating plate to be carried away by the moist air. This energy can account for over 70% of total energy consumption. Recycling this energy can significantly improve energy efficiency and reduce the production cost of pulp molded products.

[0003] Chinese patent CN103774486B discloses a normal-pressure superheated steam pulp molding dryer. The heat exchanger is the same width as the upper air duct, with the windward side of the heat exchanger facing upward and the air outlet facing downward, forming the bottom of the upper air duct and the top of the drying oven. The heat exchanger is connected to a heat source. A conveyor chain is arranged within the drying oven and circulates in a stacked pattern from top to bottom. The exhaust device includes a waste heat utilization pipe and an automatic waste heat utilization valve, making this device more efficient and environmentally friendly than traditional dryers. Chinese patent CN219572466U discloses a dryer for paper and plastic production. It features a drying box with a door and an air inlet pipe installed on the outside, a support structure installed at equal intervals at the lower end, drying mechanisms installed at equal intervals within the box, and waste heat utilization mechanisms installed on both sides of the drying box. Compared with existing technologies, the waste heat utilization mechanism dehumidifies the hot air and reuses it, further improving the drying effect, reducing the drying time required, and increasing drying efficiency.

[0004] However, the equipment described in the above two technical solutions are only applicable to dry-pressed products in pulp molding molds, but not to high-quality wet-pressed products, which will account for a larger proportion of the pulp molding industry in the future. Therefore, we hope to design a pulp molding thermoforming part with a new structure to solve this problem. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a pulp molding thermoforming device to solve the problems raised in the above background technology.

[0006] The utility model is realized by the following technical solution: a pulp molding thermoforming device, comprising: a molding machine lower shell, a molding machine upper shell, a hydraulic system, a hot pressing upper mold heating system, a hot pressing lower mold heating system, a waste heat utilization system, a slide, and a steam-water separation system. The molding machine lower shell is fixed to the molding machine upper shell at the upper end by four columns, and the hydraulic system is fixed to the center position of the top of the molding machine upper shell by screws;

[0007] A hot pressing upper mold heating system is fixed on the lower side of the upper shell of the molding machine, a slide is installed on the upper side of the lower shell of the molding machine, a waste heat utilization system is installed on the upper side of the slide, and a hot pressing lower mold heating system is fixed on the upper side of the waste heat utilization system;

[0008] The waste heat utilization system includes a first-level steam header, a second-level steam header, a steam-water separation system, and a load-bearing base from top to bottom according to the operating mode. Multiple groups of the first-level steam headers are connected to the interior of the hot pressing lower mold through the vent hole 1 on the hot pressing lower mold and the vent hole 2 on the hot lower air support insulation board.

[0009] As a preferred embodiment, the hot pressing lower mold heating system includes, from bottom to top in accordance with the assembly method, a hot lower air support insulation board, a hot lower glass fiber insulation board 1, a hot lower glass fiber insulation board 2, a hot lower heating plate and a hot pressing lower mold;

[0010] The upper side of the hot lower air supporting heat insulation board is fixed with a hot lower glass fiber insulation board 1 and a hot lower glass fiber insulation board 2 by long screws, and the upper side of the hot lower air supporting heat insulation board is fixed with a hot pressing lower mold by long screws and the hot lower glass fiber insulation board 1 and the hot lower glass fiber insulation board 2. The hot upper glass fiber insulation board 1 and the hot upper glass fiber insulation board 2 are both synthesized by glass fiber material and a high heat-resistant composite material, have high mechanical properties and good heat resistance, and can be used to isolate the heat of the hot upper heating plate from dissipating energy to the non-working surface. In actual use, the structure and installation method of the hot pressing lower mold heating system are slightly different from those of the hot pressing upper mold heating system. One difference is that, compared with the corresponding parts of the hot pressing upper mold heating system, the hot lower air supporting heat insulation board, the hot lower glass fiber insulation board 1, the hot lower glass fiber insulation board 2 and the hot lower heating board only have additional vents for removing water vapor generated during the hot pressing upper mold and hot pressing lower mold closing and drying process in the hot pressing upper mold heating system;

[0011] The second difference is that the hot pressing lower mold is equipped with a hot lower heating plate, a hot lower glass fiber insulation board 1, a hot lower glass fiber insulation board 2, and a hot lower air support insulation board, which are sequentially installed on the load-bearing base through long screws. The heating rod power supply protection shell and the isolation protection board are fixed to the threaded holes of the hot lower air support insulation board and the hot lower heating plate through fastening screws;

[0012] During use, the structure and size specifications of the hot lower air support insulation board are the same as those of the hot upper air support insulation board in the hot pressing upper mold heating system, and the hot pressing lower mold is also equipped with a heating rod power protection shell and a heating rod. The heating rod power protection shell and the heating rod structure and size in the two positions are the same.

[0013] As a preferred embodiment, the left end of each group of the first-stage steam headers is connected to the second-stage steam header via a high-temperature steam inlet pipe and a suction pipe, and the front end of the second-stage steam header is connected to the high-temperature steam inlet pipe;

[0014] The steam-water separation system comprises a first steam-water separator and a second steam-water separator, and the specifications of the first steam-water separator are the same as those of the second steam-water separator.

[0015] As a preferred embodiment, the right end of the high-temperature steam inlet pipe is connected to the steam-water separator 1 through the steam-water separator air inlet pipe on the left part, the steam-water separator 1 is connected to the steam-water separator 2 through the steam-water separator air inlet pipe on the right part, and the steam-water separator 2 is connected to the high-temperature air inlet pipe through the dry air outlet pipe;

[0016] The rear side of the high-temperature air inlet pipe is connected to the high-temperature air inlet manifold, the left side of the high-temperature air inlet manifold is connected to the right end of the load-bearing base, and multiple heat exchangers are evenly installed inside the front and rear sides of the load-bearing base;

[0017] The steam-water separator 1 and the steam-water separator 2 are connected through a circulation pipeline. The air inlet end of the steam-water separator 1 is connected to the high-temperature water vapor inlet pipe through the air inlet gradually contracting pipe, and the air outlet end of the steam-water separator 2 is connected to the high-temperature air inlet pipe through the air inlet gradually widening pipe.

[0018] As a preferred embodiment, the first-stage steam header is a round tube, with a total of four groups. One end of the first-stage steam header is welded and sealed by a circular metal sheet of equal diameter, and the other end of the first-stage steam header is installed with a docking flange;

[0019] The upper side of the column of the first-stage steam header is provided with four groups of steam inlets at equal intervals for guiding the high-temperature steam generated during the pulp molding and drying process into the first-stage steam header;

[0020] The steam inlet includes an extension pipe, an inlet connecting flange, a flange sealing ring and a tapered connecting pipe, and the extension pipe, the inlet connecting flange, the flange sealing ring and the tapered connecting pipe are connected in sequence by welding and fixed to the upper side of the first-stage steam header pipe body;

[0021] The inlet connecting flange and the docking flange are both provided with threaded through holes, and the inlet connecting flange is connected to the working back side of the hot lower air support insulation board through screws and threaded through holes;

[0022] The butt flange is connected to the flanges on the four high-temperature steam inlet pipes in the secondary steam header through screws and threaded through holes.

[0023] As a preferred embodiment, a sealing ring made of rubber with a "day" - shaped structure is installed on the upper side of the load - bearing base. The structure of the sealing ring matches the distribution structure of the ventilation hole 1. The load - bearing base is a cuboid cast - iron box body;

[0024] Inside the load - bearing base, there is a support beam which can be used to strengthen the support force of the working surface of the box body and divide the entire cast - iron box body into two heat - exchange zones;

[0025] On the front and rear side walls of the two heat - exchange zones, a plurality of partition plates are equidistantly arranged, making the two heat - exchange zones both have a serpentine flow - channel structure to enhance the heat - exchange efficiency of the heat exchanger. Inside the two heat - exchange zones, a plurality of heat exchangers arranged in a staggered manner are installed and fixed to the front and rear side walls of the two heat - exchange zones through heat - exchanger clamping plates;

[0026] In the same heat - exchange zone, the multiple heat exchangers are connected to the cold - water inlet, cold - air inlet, hot - water outlet, and hot - air outlet through multiple circulation inlet pipes and multiple circulation outlet pipes, forming the cold - part structure of the entire waste - heat utilization system.

[0027] As a preferred embodiment, on the left and right side walls of the load - bearing base, there are arc - groove stiffeners for strengthening the support force of the working surface of the load - bearing base. The left - hand side of the load - bearing base with an arc - groove stiffener can be used to install the secondary steam header, and the right - hand side of the load - bearing base with an arc - groove stiffener is for the high - temperature air inlet header; <00千0058>The secondary steam header and the high - temperature air inlet header are both fixed to the left and right sides of the load - bearing base through screws penetrating the semi - circular clamp and the through - hole 2 provided thereon.

[0029] As a preferred embodiment, four bent high - temperature steam inlet pipes and a suction connection pipe extending outward from the surface of the secondary steam header are connected to the docking flange of the primary steam header;

[0030] At the same time, the end of the secondary steam header is connected to the high - temperature steam inlet pipe by welding, thus forming the intake - end structure of the high - temperature steam in the hot part of the entire waste - heat utilization system;

[0031] On the surface of the high - temperature air inlet header, four branch pipes extend horizontally and are connected to the two heat - exchange zones in the load - bearing base. The end of the high - temperature air inlet header is connected to the high - temperature air inlet pipe by welding, thus forming the intake - end structure of the high - temperature air in the hot part of the entire waste - heat utilization system;

[0032] At the left - most ends of the two heat - exchange zones, two sets of waste - gas holes are opened downward for connecting to the waste - gas connection pipe. The end of the waste - gas connection pipe is provided with a waste - gas outlet.

[0033] After adopting the above technical solution, the beneficial effect of the utility model is as follows: by providing a vent hole 1 in the hot pressing lower mold and cooperating with the waste heat utilization system, the water vapor generated during the hot pressing upper mold and the hot pressing lower mold closing and drying process can be introduced into the waste heat utilization system, thereby completing the purpose of subsequent waste heat exchange utilization; a plurality of vent holes 1 are evenly distributed on the hot pressing lower mold, which enables the water vapor generated during the hot pressing upper mold and the hot pressing lower mold closing and drying process to be discharged quickly and evenly, avoiding affecting the normal closing and drying process, and also avoiding a large amount of water vapor remaining between the hot pressing upper mold and the hot pressing lower mold after the closing and drying is completed, causing the paper plastic product to reabsorb a large amount of water vapor after the mold is opened, thereby affecting the drying quality of the product;

[0034] The end of the secondary steam header is connected to the high-temperature steam inlet pipe by welding, thus forming the air inlet end structure of the hot part of the waste heat utilization system. It can quickly and smoothly introduce the water vapor generated during the hot pressing upper mold and hot pressing lower mold closing and drying process into the water vapor separation system. The four sets of primary steam headers cooperate with the secondary steam header. Through a relatively reasonable structure, the large amount of water vapor generated during the hot pressing upper mold and hot pressing lower mold closing and drying process is collected and transported in a unified manner through a distribution and convergence method, which facilitates the subsequent unified transportation to the water vapor separation system and centralized water vapor separation treatment.

[0035] The end of the high-temperature air intake manifold is connected to the high-temperature air inlet pipe by welding, thereby forming the intake end structure of the high-temperature air in the hot part of the entire waste heat utilization system. The water vapor separation system separates the high-temperature water vapor twice in succession by setting water vapor separator 1 and water vapor separator 2, so that it enters the load-bearing base in the form of dry high-temperature air to participate in heat exchange. This can prevent the water vapor in the gas from pre-condensing and condensing inside the load-bearing base during the heat exchange process, ensuring that the heat exchange efficiency is always at a high level. There is no need for subsequent additional treatment of the condensed water, which greatly facilitates the subsequent maintenance of the equipment.

[0036] The multiple heat exchangers in the heat exchange area are connected to the cold water inlet, cold air inlet, hot water outlet and hot air outlet through multiple circulation inlet pipes and multiple circulation outlet pipes to form the cold part structure of the entire waste heat utilization system. The interior of the load-bearing base is divided into two heat exchange areas to form the hot part structure of the entire waste heat utilization system. The waste heat utilization system can heat the cold water and cold air simultaneously, and finally obtain two heat sources, hot water and hot air, which is convenient for the subsequent reuse of waste heat, and also effectively avoids the energy waste and environmental pollution caused by the direct discharge of steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 This is a schematic diagram of the main structure of a pulp molding thermoforming device of the present invention.

[0039] Figure 2 This is a schematic diagram of the right side structure of a pulp molding thermoforming device of the present invention.

[0040] Figure 3 This is a schematic diagram of the main view of the connection between the hot pressing lower mold heating system and the waste heat utilization system of a pulp molding thermoforming device of the present invention.

[0041] Figure 4 This is a left-side schematic diagram of the connection between the hot pressing lower mold heating system and the waste heat utilization system of a pulp molding thermoforming device of the utility model.

[0042] Figure 5 This is a schematic diagram of a top view of a hot pressing lower mold of a pulp molding thermoforming device of the present invention.

[0043] Figure 6 This is a schematic diagram of the main structure of the connection between the hot lower heating plate and the hot lower glass fiber insulation board 1 and the hot lower glass fiber insulation board 2 of a pulp molding thermoforming device of the present invention.

[0044] Figure 7 This is a schematic top view of the connection between a hot lower heating plate, a hot lower glass fiber insulation board 1, and a hot lower glass fiber insulation board 2 of a pulp molding thermoforming device of the present invention.

[0045] Figure 8 This is a schematic diagram of the main view of the connection between the first-level steam header and the hot lower air support insulation board of a pulp molding thermoforming device of the present invention.

[0046] Figure 9 This is a schematic diagram of the main view of a first-stage steam header of a pulp molding thermoforming device according to the present invention.

[0047] Figure 10 This is a schematic diagram of a top view of a first-stage steam header of a pulp molding thermoforming device according to the present invention.

[0048] Figure 11 This is a schematic diagram of the left side structure of a first-stage steam header of a pulp molding thermoforming device according to the present invention.

[0049] Figure 12 This is a schematic diagram of the internal structure of a load-bearing base of a pulp molding thermoforming device of the present invention.

[0050] Figure 13 This is a schematic diagram of the main view of a waste heat utilization system of a pulp molding thermoforming device according to the present invention.

[0051] Figure 14 This is a schematic diagram of a rear view of a waste heat utilization system of a pulp molding thermoforming device according to the present invention.

[0052] Figure 15 This is a schematic diagram of a left view of a waste heat utilization system of a pulp molding thermoforming device according to the present invention.

[0053] Figure 16 This is a schematic diagram of the right side view of a waste heat utilization system of a pulp molding thermoforming device according to the present invention.

[0054] Figure 17 This is a schematic diagram of the structure of a steam-water separation system of a pulp molding thermoforming device of the present invention.

[0055] In the figure, 1-molding machine upper shell, 2-hydraulic system, 3-hot pressing upper mold heating system, 4-hot pressing lower mold heating system, 5-waste heat utilization system, 6-slide, 7-molding machine lower shell, 8-column, 9-steam-water separation system, 32-hot pressing lower mold, 33-hot lower air support insulation board, 34-suction connecting pipe, 35-load-bearing base, 40-steam-water separator 1, 41-steam-water separator 2, 42-hot lower heating plate, 43-hot lower glass fiber insulation board 1, 44-hot lower glass fiber insulation board 2, 45-vent 1, 46-vent 2, 47-first-level steam header, 48-steam inlet, 49-extension pipe, 50-inlet connecting flange, 51-flange sealing ring, 52-joint flange , 53- tapered connecting pipe, 54-threaded through hole, 55-sealing ring, 56-heat exchange area, 57-heat exchanger, 58-heat exchanger splint, 59-circulation inlet pipe, 60-circulation outlet pipe, 61-partition, 62-high-temperature air inlet header, 63-semicircular clamp, 64-cold water inlet, 65-cold air inlet, 66-through hole two, 67-branch pipe, 68-high-temperature air inlet pipe, 69-high-temperature water vapor inlet pipe, 70-exhaust gas connecting pipe, 71-hot water outlet, 72-hot air outlet, 73-secondary steam header, 74-high-temperature water vapor inlet pipe, 75-exhaust port, 76-inlet tapered pipe, 78-inlet gradually widened pipe, 79-steam-water separator inlet pipe, 80-dry air outlet pipe. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0057] See also Figures 1 to 17 The utility model provides a technical solution: a pulp molding thermoforming device, comprising: a molding machine lower shell 7, a molding machine upper shell 1, a hydraulic system 2, a hot pressing upper mold heating system 3, a hot pressing lower mold heating system 4, a waste heat utilization system 5, a slide 6, and a steam-water separation system 9. The molding machine lower shell 7 is fixed to the molding machine upper shell 1 at the upper end by four columns 8, and the hydraulic system 2 is fixed to the center position of the top of the molding machine upper shell 1 by screws.

[0058] A hot pressing upper die heating system 3 is fixed to the lower side of the molding machine upper shell 1, a slide 6 is installed on the upper side of the molding machine lower shell 7, a waste heat utilization system 5 is installed on the upper side of the slide 6, and a hot pressing lower die heating system 4 is fixed to the upper side of the waste heat utilization system 5;

[0059] The waste heat utilization system 5 includes, from top to bottom in accordance with the operating mode, a first-stage steam header 47, a second-stage steam header 73, a steam-water separation system 9, and a load-bearing base 35. Multiple sets of first-stage steam headers 47 are connected to the interior of the hot pressing lower mold 32 through the vent hole 1 45 on the hot pressing lower mold 32 and the vent hole 2 46 on the hot air support insulation board 33.

[0060] See also Figures 1 to 7 The hot pressing lower mold heating system 4 includes, from bottom to top, a hot air support insulation board 33, a hot fiberglass insulation board 1 43, a hot fiberglass insulation board 2 44, a hot heating plate 42 and a hot pressing lower mold 32 in accordance with the assembly method;

[0061] The upper side of the hot air support insulation board 33 is fixed with a hot glass fiber insulation board 1 43 and a hot glass fiber insulation board 2 44 by long screws, and the upper side of the hot air support insulation board 33 is fixed with a hot pressing lower mold 32 by long screws and the hot glass fiber insulation board 1 43 and the hot glass fiber insulation board 2 44. The hot glass fiber insulation board 1 43 and the hot glass fiber insulation board 2 44 are both made of glass fiber material and a high heat-resistant composite material, have high mechanical properties and good heat resistance, and can be used to insulate the upper heating plate from heat. In actual use, the structure and installation method of the hot pressing lower mold heating system 4 and the hot pressing upper mold heating system 3 are slightly different. First, the hot lower air support insulation board 33, the hot lower glass fiber insulation board 1 43, the hot lower glass fiber insulation board 2 44, and the hot lower heating plate 42 are only increased by the vent hole 1 45 compared with the corresponding parts of the hot pressing upper mold heating system 3 to remove the water vapor generated during the closing and drying process of the hot pressing upper mold and the hot pressing lower mold 32 in the hot pressing upper mold heating system 3;

[0062] The second difference is that the hot pressing lower mold 32 is equipped with a lower heating plate 42 of the heating rod, a lower glass fiber insulation board 1 43, a lower glass fiber insulation board 2 44, and a lower air support insulation board 33, which are sequentially mounted on the load-bearing base 35 by long screws. The heating rod power supply protection shell and the isolation protection board are fixed to the threaded holes of the lower air support insulation board 33 and the lower heating plate 42 by fastening screws.

[0063] During use, the structure and size specifications of the hot lower air support insulation board 33 are the same as those of the hot upper air support insulation board in the hot pressing upper mold heating system 3, and the hot pressing lower mold 32 is also equipped with a heating rod power protection shell and a heating rod. The heating rod power protection shell and the heating rod structure and size at the two positions are the same.

[0064] As the first embodiment of the present invention, by opening a vent hole 45 in the hot pressing lower mold 32 and cooperating with the waste heat utilization system 5, the water vapor generated during the hot pressing upper mold and the hot pressing lower mold 32 mold closing and drying process can be introduced into the waste heat utilization system 5, thereby completing the purpose of subsequent waste heat exchange utilization. A plurality of vent holes 45 are evenly distributed on the hot pressing lower mold 32, which enables the water vapor generated during the hot pressing upper mold 15 and the hot pressing lower mold 32 mold closing and drying process to be discharged quickly and evenly, and also avoids a large amount of water vapor remaining between the hot pressing upper mold 15 and the hot pressing lower mold 32 after the mold closing and drying is completed, causing the paper plastic product to reabsorb a large amount of water vapor after the mold is opened, thereby affecting the drying quality of the product.

[0065] See also Figures 1 to 15 The left end of each set of first-stage steam headers 47 is connected to the second-stage steam header 73 through a high-temperature steam inlet pipe 74 and a suction pipe 34. The front end of the second-stage steam header 73 is connected to the high-temperature steam inlet pipe 69.

[0066] The steam-water separation system 9 includes a steam-water separator 1 40 and a steam-water separator 2 41 . The specifications of the steam-water separator 1 40 are the same as those of the steam-water separator 2 41 .

[0067] The right end of the high-temperature steam inlet pipe 69 is connected to the water-steam separator 1 40 through the water-steam separator air inlet pipe 79 on the left side. The water-steam separator 1 40 is connected to the water-steam separator 2 41 through the water-steam separator air inlet pipe 79 on the right side. The water-steam separator 2 41 is connected to the high-temperature air inlet pipe 68 through the dry air outlet pipe 80.

[0068] The rear side of the high-temperature air inlet pipe 68 is connected to the high-temperature air inlet manifold 62. The left side of the high-temperature air inlet manifold 62 is connected to the right end of the load-carrying base 35. Multiple heat exchangers 57 are evenly spaced inside the front and rear sides of the load-carrying base 35.

[0069] The steam-water separator 1 40 and the steam-water separator 2 41 are connected through a circulation pipe. The air inlet end of the steam-water separator 1 40 is connected to the high-temperature water vapor inlet pipe 69 through the air inlet gradually converging pipe 76, and the air outlet end of the steam-water separator 2 41 is connected to the high-temperature air inlet pipe 68 through the air inlet gradually widening pipe 78.

[0070] The first-stage steam header 47 is a circular tube, and there are four of them. One end of the first-stage steam header 47 is welded and sealed by a circular metal sheet of equal diameter, and the other end of the first-stage steam header 47 is installed with a docking flange 52;

[0071] Four groups of steam inlets 48 are equidistantly provided on the upper side of the column of the primary steam header 47 for guiding the high-temperature steam generated during the pulp molding and drying process into the primary steam header 47;

[0072] The steam inlet 48 includes an extension pipe 49, an inlet connecting flange 50, a flange sealing ring 51, and a tapered connecting pipe 53. The extension pipe 49, the inlet connecting flange 50, the flange sealing ring 51, and the tapered connecting pipe 53 are sequentially connected by welding and fixed to the upper side of the pipe body of the first-stage steam header 47.

[0073] The inlet connecting flange 50 and the docking flange 52 are both provided with threaded through holes 54 , and the inlet connecting flange 50 is connected to the working back surface of the hot lower air support insulation board 33 through screws and threaded through holes 54 ;

[0074] The docking flange 52 is connected to the flanges on the four high-temperature steam inlet pipes 74 in the secondary steam header 73 through screws and threaded through holes 54 .

[0075] On the upper side of the load-bearing base 35, a sealing ring 55 made of rubber in a "day" shape structure is installed. The structure of the sealing ring 55 matches the distribution structure of the ventilation holes 45. The load-bearing base 35 is a rectangular cast iron box body;

[0076] Inside the load-bearing base 35, there is a support beam that can be used to strengthen the support force of the working surface of the box body and divide the entire cast iron box body into two heat exchange areas 56;

[0077] On the front and rear side walls of the two heat exchange areas 56, a plurality of partition plates 61 are arranged at equal distances, making the two heat exchange areas 56 both in a serpentine flow channel structure to enhance the heat exchange efficiency of the heat exchanger 57. Inside the two heat exchange areas 56, a plurality of heat exchangers 57 arranged in a staggered manner are installed, and they are fixed to the front and rear side walls of the two heat exchange areas 56 through heat exchanger clamping plates 58;

[0078] In the same heat exchange area 56, the plurality of heat exchangers 57 are connected to the cold water inlet 64, cold air inlet 65, hot water outlet 71, and hot air outlet 72 through a plurality of circulating inlet pipes 59 and a plurality of circulating outlet pipes 60 to form the cold part structure of the entire waste heat utilization system 5.

[0079] As the second embodiment of the present utility model, based on the above first embodiment, the high-temperature water vapor entering the secondary steam header 73 enters the inside of the first water-vapor separator 40 in the water-vapor separation system 9 through the high-temperature water vapor inlet pipe 69 and a part of the steam separator intake pipe 79. Under the action of the first water-vapor separator 40, most of the water in the high-temperature water vapor is intercepted, and the relatively dry high-temperature gas enters the second water-vapor separator 41 in the water-vapor separation system 9 through the other part of the steam separator intake pipe 79. In the second water-vapor separator 41, the high-temperature gas that has been separated once is subjected to water-vapor separation again, so that the more dry high-temperature gas enters the high-temperature air inlet pipe 68 through the dry air outlet pipe 80. Subsequently, the high-temperature air inlet pipe 68 evenly transports the high-temperature dry air to the inside of the right end of the load-bearing base 35 through the branch pipe 67. The end of the high-temperature air intake header 62 is connected to the high-temperature air inlet pipe 68 by welding to form the intake end structure of the hot part high-temperature air in the entire waste heat utilization system 5. The water-vapor separation system 9 continuously performs water-vapor separation on the high-temperature water vapor twice by setting the first water-vapor separator 40 and the second water-vapor separator 41, enabling it to enter the load-bearing base 35 in the form of dry high-temperature air to participate in heat exchange, which can avoid the pre-condensation and aggregation of water vapor in the gas during the heat exchange process inside the load-bearing base 35, ensure that the heat exchange efficiency is always at a relatively high level, and there is no need for subsequent additional treatment of the condensed water, which greatly facilitates the maintenance of subsequent equipment.

[0080] Please refer to Figures 3 to 17The left and right side walls of the load-bearing base 35 are provided with arc groove reinforcement ribs for strengthening the supporting force of the working surface of the load-bearing base 35. The left side of the load-bearing base 35 is provided with arc groove reinforcement ribs for accommodating the secondary steam header 73, and the right side of the load-bearing base 35 is provided with arc groove reinforcement ribs for accommodating the high-temperature air intake header 62;

[0081] The secondary steam header 73 and the high-temperature air intake header 62 are fixed to the left and right sides of the load-bearing base 35 by screws penetrating the semicircular clamp 63 and the second through-hole 66 provided thereon.

[0082] The four curved high-temperature steam inlet pipes 74 and the suction pipe 34 extending outward from the surface of the secondary steam header 73 are connected to the docking flange 52 of the primary steam header 47;

[0083] At the same time, the end of the secondary steam header 73 is connected to the high-temperature steam inlet pipe 69 by welding, thereby forming the inlet end structure of the high-temperature steam in the hot part of the entire waste heat utilization system 5;

[0084] Four branch pipes 67 extend horizontally from the surface of the high-temperature air intake manifold 62 and connect to the two heat exchange areas 56 in the load-carrying base 35. The ends of the high-temperature air intake manifold 62 are connected to the high-temperature air inlet pipes 68 by welding, thereby forming the intake end structure of the high-temperature air in the hot part of the entire waste heat utilization system 5.

[0085] The leftmost ends of the two heat exchange areas 56 are each provided with two sets of exhaust holes downwardly for connecting to the exhaust gas connecting pipe 70 , and the end of the exhaust gas connecting pipe 70 is provided with an exhaust port 75 .

[0086] As a third embodiment of the present invention, based on the above-mentioned second embodiment, a plurality of heat exchangers 57 in the heat exchange area 56 are connected to the cold water inlet 64, the cold air inlet 65, the hot water outlet 71 and the hot air outlet 72 through a plurality of circulation inlet pipes 59 and a plurality of circulation outlet pipes 60 to form the cold part structure of the entire waste heat utilization system 5. In actual use, when the dry high-temperature gas enters the two heat exchange areas 56 synchronously through the multiple branch pipes 67, the high-temperature dry gas moves quickly from the right end to the left end of the two heat exchange areas 56 of the load-bearing base 35. Since the side walls of the front and rear sides of the two heat exchange areas 56 are evenly spaced, the heat exchangers 57 are connected to the cold water inlet 64, the cold air inlet 65 and the hot water outlet 71 and the hot air outlet 72 to form the cold part structure of the entire waste heat utilization system 5. The plate 61 makes the two heat exchange areas 56 have a serpentine flow channel structure. A plurality of staggered heat exchangers 57 are arranged inside the two heat exchange areas 56 and fixed to the front and rear side walls of the two heat exchange areas 56 through the heat exchanger clamping plate 58. The plurality of staggered heat exchangers 57 in the two heat exchange areas are connected to the cold water inlet 64, the cold air inlet 65 and the hot water outlet 71 and the hot air outlet 72 through a plurality of circulation inlet pipes 59 and a plurality of circulation outlet pipes 60, forming two serpentine heat exchange paths. When the dry high-temperature gas enters the interior of the two heat exchange areas 56 through a plurality of branch pipes 67 at the same time, the cold water and the cold air are transferred through the cold water inlet 64. The cold air inlet 65 passes through a plurality of circulation inlet pipes 59 and a plurality of circulation outlet pipes 60 respectively. Under the coordinated action of the plurality of circulation inlet pipes 59 and the plurality of circulation outlet pipes 60, the cold water and the cold air move in a serpentine path in the heat exchanger 57 in the corresponding heat exchange area 56. The plurality of circulation inlet pipes 59, the plurality of circulation outlet pipes 60 and the plurality of heat exchangers 57 are heated by the high-temperature dry gas flowing in the heat exchange area 56. Under the characteristics of rapid convection and radiation from high temperature to low temperature area, the cold water and the cold air in the plurality of circulation inlet pipes 59, the plurality of circulation outlet pipes 60 and the plurality of heat exchangers 57 are heated and finally pass through the heat exchanger 57 at the left end of the load base. The hot water outlet 71 and the hot air outlet are used to drive an external absorption refrigerator for summer cooling or as a drying heat source for paper trays of some non-fine pulp molded products. At the same time, the heat exchange high-temperature dry gas moving to the left side of the heat exchange area enters the exhaust gas joint 70 through multiple exhaust holes, and is finally discharged through the exhaust port 75, dividing the interior of the load-bearing base 35 into two heat exchange areas 56. The waste heat utilization system can heat the cold water and cold air simultaneously, and finally obtain two heat sources, hot water and hot air, to facilitate the subsequent reuse of the waste heat, while also effectively avoiding the energy waste and environmental pollution caused by the direct discharge of steam.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pulp molding thermoforming device comprising: A molding machine lower shell (7), a molding machine upper shell (1), a hydraulic system (2), a hot pressing upper mold heating system (3), a hot pressing lower mold heating system (4), a waste heat utilization system (5), a slide (6), and a steam-water separation system (9), characterized in that the molding machine upper shell (1) is fixed to the upper end of the molding machine lower shell (7) by four columns (8), and the hydraulic system (2) is fixed to the center position of the top end of the molding machine upper shell (1) by screws; A hot pressing upper die heating system (3) is fixed on the lower side of the molding machine upper shell (1), a slide (6) is installed on the upper side of the molding machine lower shell (7), a waste heat utilization system (5) is installed on the upper side of the slide (6), and a hot pressing lower die heating system (4) is fixed on the upper side of the waste heat utilization system (5); The waste heat utilization system (5) includes, from top to bottom in accordance with the operation mode, a first-stage steam header (47), a second-stage steam header (73), a steam-water separation system (9), and a load-bearing base (35). Multiple groups of the first-stage steam headers (47) are connected to the interior of the hot pressing lower mold (32) through the vent hole 1 (45) on the hot pressing lower mold (32) and the vent hole 2 (46) on the hot lower air support insulation board (33).

2. A pulp molding thermoforming device according to claim 1, characterized in that: The hot pressing lower mold heating system (4) comprises, in order from bottom to top according to the assembly method, a hot lower air support insulation board (33), a hot lower glass fiber insulation board 1 (43), a hot lower glass fiber insulation board 2 (44), a hot lower heating board (42) and a hot pressing lower mold (32); The upper side of the hot lower air support insulation board (33) is fixed with a hot lower glass fiber insulation board 1 (43) and a hot lower glass fiber insulation board 2 (44) by long screws, and the upper side of the hot lower air support insulation board (33) is fixed with a hot pressing lower mold (32) by long screws and the hot lower glass fiber insulation board 1 (43) and the hot lower glass fiber insulation board 2 (44).

3. A pulp molding thermoforming device according to claim 2, characterized in that: The left end of each group of the first-stage steam headers (47) is connected to the second-stage steam header (73) via a high-temperature steam inlet pipe (74) and a suction pipe (34), and the front end of the second-stage steam header (73) is connected to the high-temperature steam inlet pipe (69); The steam-water separation system (9) includes a steam-water separator 1 (40) and a steam-water separator 2 (41). The specifications of the steam-water separator 1 (40) are the same as those of the steam-water separator 2 (41).

4. A pulp molding thermoforming device according to claim 3, characterized in that: The right end of the high-temperature steam inlet pipe (69) is connected to the first steam-water separator (40) through the steam-water separator air inlet pipe (79) on the left side, the first steam-water separator (40) is connected to the second steam-water separator (41) through the steam-water separator air inlet pipe (79) on the right side, and the second steam-water separator (41) is connected to the high-temperature air inlet pipe (68) through the dry air outlet pipe (80); The rear side of the high-temperature air inlet pipe (68) is connected to the high-temperature air inlet manifold (62), the left side of the high-temperature air inlet manifold (62) is connected to the right end of the load-bearing base (35), and a plurality of heat exchangers (57) are evenly spaced inside the front and rear sides of the load-bearing base (35); A steam-water separator I (40) and a steam-water separator II (41) are connected by a circulation pipeline. The intake end of the steam-water separator I (40) is connected to a high-temperature steam inlet pipe (69) through a converging intake pipe (76), and the outlet end of the steam-water separator II (41) is connected to a high-temperature air inlet pipe (68) through a diverging intake pipe (78).

5. The pulp molding thermoforming device according to claim 1, characterized in that: The first-stage steam header (47) is a kind of round pipe, with a total of four groups. One end of the first-stage steam header (47) is welded and sealed by a circular metal sheet with the same diameter, and a butt flange (52) is installed at the other end of the first-stage steam header (47); Four groups of steam inlets (48) are equidistantly arranged on the upper side of the cylinder of the first-stage steam header (47) to guide the high-temperature steam generated during the pulp molding drying process into the first-stage steam header (47); The steam inlet (48) includes an extension pipe (49), an inlet connection flange (50), a flange sealing ring (51), and a converging connection pipe (53). The extension pipe (49), the inlet connection flange (50), the flange sealing ring (51), and the converging connection pipe (53) are sequentially connected and fixed to the upper side of the pipe body of the first-stage steam header (47) by welding; Both the inlet connection flange (50) and the butt flange (52) are provided with threaded through holes (54). The inlet connection flange (50) is connected to the working back surface of the hot lower air support heat insulation plate (33) through screws and the threaded through holes (54); The butt flange (52) is connected to the flanges on the four high-temperature steam inlet pipes (74) in the second-stage steam header (73) through screws and the threaded through holes (54).

6. A pulp molding thermoforming device according to claim 5, characterized in that: A sealing ring (55) made of rubber in a "day" - shaped structure is installed on the upper side of the load-bearing base (35). The structure of the sealing ring (55) matches the distribution structure of the air vent I (45). The load-bearing base (35) is a rectangular cast iron box body; A support beam is provided inside the load-bearing base (35) to strengthen the support force of the working surface of the box body and divide the entire cast iron box body into two heat exchange zones (56); A plurality of partition plates (61) are equidistantly arranged on the front and rear side walls of the two heat exchange zones (56) so that the two heat exchange zones (56) both have a serpentine flow channel structure to enhance the heat exchange efficiency of the heat exchanger (57). A plurality of heat exchangers (57) arranged in a staggered manner are installed inside the two heat exchange zones (56) and are fixed to the front and rear side walls of the two heat exchange zones (56) by heat exchanger clamping plates (58); A plurality of heat exchangers (57) in the same heat exchange zone (56) are connected to a cold water inlet (64), a cold air inlet (65), a hot water outlet (71), and a hot air outlet (72) through a plurality of circulation inlet pipes (59) and a plurality of circulation outlet pipes (60) to form the cold part structure of the entire waste heat utilization system (5).

7. A pulp molding thermoforming device according to claim 6, characterized in that: The left and right side walls of the load-bearing base (35) are provided with arc groove reinforcement ribs for strengthening the supporting force of the working surface of the load-bearing base (35); the left side of the load-bearing base (35) is provided with arc groove reinforcement ribs for accommodating the secondary steam header (73); the right side of the load-bearing base (35) is provided with arc groove reinforcement ribs for accommodating the high-temperature air intake header (62); The secondary steam header (73) and the high-temperature air intake header (62) are fixed to the left and right sides of the load-bearing base (35) by screws penetrating the semicircular clamp (63) and the second through-hole (66) provided thereon.

8. A pulp molding thermoforming device according to claim 7, characterized in that: Four curved high-temperature steam inlet pipes (74) and a suction pipe (34) extending outward from the surface of the secondary steam header (73) are connected to the docking flange (52) of the primary steam header (47); At the same time, the end of the secondary steam header (73) is connected to the high-temperature steam inlet pipe (69) by welding, thereby forming the inlet end structure of the high-temperature steam in the middle heat section of the entire waste heat utilization system (5); Four branch pipes (67) extend horizontally from the surface of the high-temperature air intake manifold (62) and are connected to the two heat exchange areas (56) in the load-bearing base (35). The end of the high-temperature air intake manifold (62) is connected to the high-temperature air intake pipe (68) by welding, thereby forming the high-temperature air intake end structure of the heat section of the entire waste heat utilization system (5); The leftmost ends of the two heat exchange zones (56) are each provided with two groups of exhaust gas holes downwardly opened for connecting to an exhaust gas joint pipe (70), and an exhaust gas port (75) is provided at the end of the exhaust gas joint pipe (70).

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