Paper pulp molding thermal forming device with waste heat utilization system

Abstract

The invention provides a pulp molding thermal forming device with a waste heat utilization system, which comprises a forming machine lower shell, a forming machine upper shell, a hydraulic system, a hot pressing upper mold heating system, a hot pressing lower mold heating system, the waste heat utilization system, a sliding table and a steam-water separation system. The waste heat utilization system has the following beneficial effects that the multiple 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 multiple circulating inlet pipes and the multiple 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 invention belongs to the technical field of pulp molding equipment, and in particular relates to a pulp molding thermoforming device with a waste heat utilization system. Background Art

[0002] In the traditional pulp molding thermoforming process, the high-temperature water vapor generated during the drying process of the pulp molding product is eventually discharged directly into the atmosphere under the action of vacuum suction. At the same time, the vacuum suction will cause part of the energy of the heating plate to be taken away by the wet air. It is calculated that this part of the energy accounts for more than 70% of the total energy consumption. If this part of the energy is recycled, the energy utilization rate can be greatly improved and the production cost of pulp molding products can be reduced.

[0003] Chinese patent CN103774486B discloses a normal pressure superheated steam pulp molding dryer. Among them, the heat exchanger is the same width as the upper air duct, the windward side of the heat exchanger faces upward, the air outlet faces downward and forms the bottom of the upper air duct and the top of the oven; the heat exchanger is connected to the heat source of the heat exchanger; the conveyor chain is arranged in the oven and bypasses in a stacked shape from top to bottom. The exhaust device includes a waste heat utilization pipe and a waste heat utilization automatic valve. Compared with the traditional dryer, the device is more efficient and environmentally friendly. Chinese patent CN219572466U discloses a dryer for paper and plastic production. It is characterized by including a drying box, the outer side of the drying box is equipped with a box door and an air inlet pipe, the lower end is equidistantly equipped with a supporting structure, the inner cavity of the box is equidistantly equipped with a drying mechanism, and the waste heat utilization mechanism is installed on both sides of the drying box. Compared with the existing technology, the hot air is dehumidified by the waste heat utilization mechanism and reused, which is convenient to further improve the drying effect, reduce the drying process. The time required for a long time is reduced, and the drying efficiency is improved.

[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 that 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 with a waste heat utilization system to solve the problems raised in the above background technology.

[0006] The present invention is achieved through the following technical scheme: a pulp molding thermoforming device with a waste heat utilization system, comprising: a lower shell of a molding machine, an upper shell of a molding machine, 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 upper end of the lower shell of the molding machine is fixed with the upper shell of the molding machine by four columns, the hydraulic system is fixed to the top center position of the upper shell of the molding machine by screws, the lower side of the upper shell of the molding machine is fixed with the hot pressing upper mold heating system, the upper side of the lower shell of the molding machine is installed with a slide, the upper side of the slide is installed with a waste heat utilization system, the upper side of the waste heat utilization system is fixed with the hot pressing lower mold heating system, the hot pressing upper mold heating system, the hot pressing lower mold heating system, the waste heat utilization system and the slide are all fixed between the upper shell of the molding machine and the lower shell of the molding machine, two columns are equidistantly distributed on both sides of the surface of the lower shell of the molding machine for supporting the upper shell of the molding machine, and sufficient working space is supported between the two.

[0007] As a preferred embodiment, the hot pressing upper mold heating system includes a fixing plate, a hot upper air support insulation plate, a hot upper glass fiber insulation plate 1, a hot upper glass fiber insulation plate 2, a hot upper heating plate, a heating rod, a heating rod power protection shell, an isolation protection plate and a hot pressing upper mold in order from top to bottom according to the assembly method;

[0008] The heat insulation board in the upper air support heat insulation board and the upper glass fiber heat insulation board 1, the upper glass fiber heat insulation board 2 and the upper heating board have the same length and width dimensions on the working surface, and the through hole 1 structure and position arranged on the working surface are also the same;

[0009] The hot upper air support insulation board includes a bottom fixing plate, a support column and an insulation board. The lower side of the bottom fixing plate is welded to the upper surface of the insulation board through a plurality of support columns distributed at equal intervals, and a plurality of threaded holes are opened on the side wall of the insulation board.

[0010] The upper surface of the bottom fixing plate is provided with a plurality of countersunk through holes distributed in a Japanese-shaped structure downward, and the plurality of countersunk through holes are used to correspond to the threaded holes on the working surface of the connecting fixing plate and the two can be tightly connected under the action of the fastening screws;

[0011] The multiple support columns are cylinders of equal height and diameter, and are used to support the thermal insulation board and the bottom fixed board and form an insulation space therebetween. The thermal fiberglass insulation board 1 and the thermal fiberglass insulation board 2 are both made of glass fiber material and a highly heat-resistant composite material, and have high mechanical properties and good heat resistance, and can be used to isolate the heat from the thermal heating board from dissipating energy to the non-working surface.

[0012] As a preferred embodiment, the heating rod includes a fixing ring, a positive power electrode, a negative power electrode, an ear hole, a heating element and a shell;

[0013] The heating element and the shell are arranged equidistantly inside the heating plate and distributed on the front and rear sides as the working body of the heating rod. The side wall of the heating plate is also provided with threaded holes. The fixing ring and the ear hole are used as fixing parts of the heating rod to lock it to the side wall of the heating plate through fastening screws and threaded holes. The side wall of the air-supported heat-insulating plate is provided with screw holes of the same specification as the threaded holes for fixing the power protection shell of the heating rod and the isolation protection plate.

[0014] A hot upper heating plate, a hot upper glass fiber insulation board 1, a hot upper glass fiber insulation board 2, and a hot upper air support insulation board are installed on the upper side of the hot pressing upper mold in sequence through long screws. The upper end of the hot upper air support insulation board is fixedly connected to the lower end of the fixed plate through long screws. During actual operation, the vertical movement of the hot pressing upper mold heating system can be controlled by controlling the extension and shortening of the piston rod in the hydraulic system.

[0015] As a preferred embodiment, the hydraulic system is parallel to the hot pressing upper die heating system in the height direction and tangent to it in the vertical direction, and the hydraulic system comprises a set of hydraulic cylinders and four guide columns;

[0016] The hydraulic system penetrates the upper shell of the molding machine in the vertical direction and is connected to the fixed plate in the hot pressing upper mold heating system through a threaded flange and screws. The piston rod in one set of the hydraulic cylinders is mainly used to realize the movement of the fixed plate in the vertical direction, and the four guide pillars are used to realize the horizontal positioning of the fixed plate.

[0017] The upper end of the fixing plate is divided into an inverted table structure, the size of the lower end of the fixing plate is the same as the size of the hot upper air support insulation board, and a large number of internal threaded blind holes are provided on the upper side of the fixing plate for fixed connection with the lower end of the piston rod.

[0018] As a preferred embodiment, the hot pressing lower mold heating system includes, from bottom to top, 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;

[0019] The upper side of the hot lower air supporting 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 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. 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. First, compared with the corresponding parts of the hot pressing upper mold heating system, the hot lower air supporting insulation board, the hot lower glass fiber insulation board 1, the hot lower glass fiber insulation board 2 and the hot lower heating plate only have additional vents for removing water vapor generated during the closing and drying process of the hot pressing upper mold and the hot pressing lower mold.

[0020] The second difference is that the hot pressing lower mold is equipped with a hot lower heating plate of the heating rod, 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, and 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;

[0021] 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, and the heating rod power supply protection shell and heating rod are also installed inside the hot pressing lower mold. The heating rod power supply protection shell and heating rod structure and size at the two positions are the same.

[0022] As a preferred embodiment, the waste heat utilization system includes a primary steam header, a secondary steam header, a steam-water separation system, and a load-bearing base in order from bottom to top according to the operation mode, and multiple groups of the primary 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;

[0023] The left end of each group of the first-stage steam headers is connected to the second-stage steam header through 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;

[0024] The steam-water separation system comprises a steam-water separator 1 and a steam-water separator 2, the specifications of the steam-water separator 1 are the same as those of the steam-water separator 2, the right end of the high-temperature water vapor inlet pipe is connected to the steam-water separator 1 through the steam-water separator air inlet pipe on the left side, the steam-water separator 1 is connected to the steam-water separator 2 through the steam-water separator air inlet pipe on the right side, and the steam-water separator 2 is connected to the high-temperature air inlet pipe through the dry air outlet pipe;

[0025] 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 a plurality of heat exchangers are evenly installed inside the front side and the rear side of the load-bearing base;

[0026] The primary steam header is a round tube, with four groups in total. One end of the primary steam header is welded and sealed by a round metal sheet of equal diameter, and a docking flange is installed at the other end of the primary steam header. Four groups of steam inlets are equidistantly arranged on the upper side of the column of the primary steam header to guide the high-temperature steam generated in the pulp molding drying process into the primary steam header;

[0027] The steam inlet comprises an extension pipe, an inlet connection flange, a flange sealing ring and a tapered connection pipe, wherein the extension pipe, the inlet connection flange, the flange sealing ring and the tapered connection pipe are connected in sequence by welding and fixed to the upper side of the first-stage steam header pipe body;

[0028] Both the inlet connection flange and the docking flange are provided with threaded through holes. The inlet connection flange is connected to the working back surface of the hot lower air support heat insulation plate through screws and threaded through holes. The docking flange is connected to the flanges on the four high-temperature steam inlet pipes in the secondary steam inlet header through screws and threaded through holes. During actual operation, the water vapor generated during the mold closing and drying process by the hot pressing upper mold heating system and the hot pressing lower mold heating system passes through the vent hole 1 and sequentially enters the steam-water separation system through the primary steam inlet header, the secondary steam inlet header, and the high-temperature steam inlet pipe to complete steam-water separation. Subsequently, the high-temperature air enters the heat exchange area from the high-temperature air inlet header and exchanges heat with the heat exchange medium in the heat exchanger. Finally, it is discharged from the exhaust gas outlet of the exhaust gas connection pipe. The heat exchange medium sequentially exchanges heat through the cold water inlet, the cold air inlet, the circulation inlet pipe, and the heat exchanger, and is finally output through the circulation outlet pipe, the hot water outlet, and the hot air outlet, which is used to drive an external absorption chiller for summer refrigeration or as a drying heat source for some non-fine pulp molding products such as paper trays.

[0029] As a preferred embodiment, a sealing ring made of rubber in a "day" shape structure is installed on the upper side of the load-bearing base. The structure of the sealing ring matches the distribution structure of the vent hole 1. The load-bearing base is a rectangular cast iron box, which is the core structure of the waste heat utilization system. A support beam is provided inside the load-bearing base, which can be used to strengthen the support force of the working surface of the box and divide the entire cast iron box into two heat exchange areas.

[0030] A plurality of partition plates are equidistantly arranged on the front and rear side walls of the two heat exchange areas, so that both heat exchange areas have a serpentine flow channel structure to enhance the heat exchange efficiency of the heat exchanger. A plurality of heat exchangers arranged in a staggered manner are installed inside the two heat exchange areas and are fixed to the front and rear side walls of the two heat exchange areas through heat exchanger clamping plates. The plurality of heat exchangers in the same heat exchange area are connected to the cold water inlet, the cold air inlet, the hot water outlet, and the hot air outlet through a plurality of circulation inlet pipes and a plurality of circulation outlet pipes to form the cold part structure of the entire waste heat utilization system.

[0031] The left and right side walls of the load-bearing base are provided with arc groove stiffeners to strengthen the support force of the working surface of the load-bearing base. The left side of the load-bearing base with an arc groove stiffener can be used to install the secondary steam inlet header, and the right side of the load-bearing base with an arc groove stiffener is the high-temperature air inlet header. The secondary steam inlet 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.

[0032] As a preferred embodiment, four bent high-temperature steam inlet pipes extending outward from the surface of the secondary steam inlet header and the suction connecting pipe are connected to the docking flange of the primary steam inlet header. At the same time, the end of the secondary steam inlet header is connected to the high-temperature steam inlet pipe by welding, thus forming the inlet end structure of the high-temperature steam in the hot part of the entire waste heat utilization system;

[0033] Four支管extend horizontally from the surface of the high-temperature air inlet header and are connected to 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 inlet end structure of the high-temperature air in the hot part of the entire waste heat utilization system;

[0034] Two sets of exhaust gas holes are opened downward at the leftmost ends of the two heat exchange zones for connecting to the exhaust gas connecting pipe, and an exhaust gas port is provided at the end of the exhaust gas connecting pipe;

[0035] The first steam-water separator includes a dry air outlet pipe, a gas storage tank, a liquid level gauge, a high-temperature wet air inlet, and a base. The side wall of the gas storage tank is provided with a high-temperature wet air inlet. A liquid level gauge is installed on the right side of the gas storage tank. A base is provided at the lower end of the gas storage tank. A sewage outlet and a waste water outlet are provided at the lower end of the gas storage tank through the base. A dry air outlet pipe is provided at the top of the gas storage tank;

[0036] The first steam-water separator and the second steam-water separator are connected by a circulation pipeline. The inlet end of the first steam-water separator is connected to the high-temperature steam inlet pipe through an inlet reducing pipe, and the outlet end of the second steam-water separator is connected to the high-temperature air inlet pipe through an inlet expanding pipe.

[0037] As a preferred embodiment, the sliding table sequentially includes a frame, a guide rail, a slider, a transfer plate, and a transfer plate fixing block from bottom to top according to the operation mode;

[0038] The frame includes three cross beams and two main beams, and the three cross beams and two main beams are all load-bearing aluminum alloy frame profiles. The frame has a "day" - shaped structure. The frame is fastened to the center position of the lower shell of the molding machine from left to right by screws and angle codes. The highest surface of the frame is at the same horizontal position as the highest surface of the lower shell of the molding machine;

[0039] The two main beams of the frame penetrate through the lower shell of the molding machine from left to right and are fixed to the front and back sides of the lower shell of the molding machine by screws and angle codes. The cross beam in the center of the frame is located on the left side between the lower shell of the molding machine and the waste heat utilization system, and the other two cross beams are respectively located at the left and right ends of the lower shell of the molding machine;

[0040] The guide rail and the frame have two main beams in total, and are fixed to the upper sides of the two main beams of the frame by screws through threaded holes in the center of the guide rail. Three groups of rectangular structure sliders are slidably installed on the upper side of each guide rail, and transfer plates are fixed to the upper sides of the six groups of sliders by screws.

[0041] After adopting the above technical scheme, the beneficial effect of the present invention is as follows: by opening 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 achieving 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 quickly and evenly discharged, thereby 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 process 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;

[0042] The end of the secondary steam intake manifold is connected to the high-temperature steam inlet pipe by welding to form the intake end structure of the hot part high-temperature steam in the whole waste heat utilization system, which can quickly and smoothly introduce the steam generated during the hot pressing upper mold and hot pressing lower mold closing and drying process into the steam separation system. The four sets of primary steam manifolds cooperate with the secondary steam intake manifolds. Through a more reasonable structure, a large amount of steam generated during the hot pressing upper mold and hot pressing lower mold closing and drying process is collected and transported uniformly in a way of division and convergence, which is convenient for subsequent unified transportation to the steam separation system and centralized steam separation treatment;

[0043] The end of the high-temperature air intake manifold is connected to the high-temperature air intake pipe by welding to form 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 by setting the water vapor separator 1 and the 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, which can avoid the pre-condensation and condensation of water vapor in the gas during the heat exchange process inside the load-bearing base, ensuring that the heat exchange efficiency is always at a high level, and there is no need for subsequent additional treatment of the condensed water, which greatly facilitates the subsequent maintenance of the equipment;

[0044] 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

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0046] Figure 1 This is a schematic diagram of the main structure of a pulp molding thermoforming device with a waste heat utilization system of the present invention.

[0047] Figure 2 This is a schematic diagram of the right side structure of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0048] Figure 3 This is a schematic diagram of the main structure of a hot pressing upper mold heating system of a pulp molding thermoforming device with a waste heat utilization system of the present invention.

[0049] Figure 4 The present invention is a schematic diagram of the assembly structure of a hot pressing upper mold heating system of a pulp molding thermoforming device with a waste heat utilization system.

[0050] Figure 5 The present invention is a schematic diagram of a front view of an air insulation board of a pulp molding thermoforming device with a waste heat utilization system.

[0051] Figure 6 The present invention is a schematic diagram of a top view of an air insulation board of a pulp molding thermoforming device with a waste heat utilization system.

[0052] Figure 7 The present invention is a schematic diagram of an air insulation board of a pulp molding thermoforming device with a waste heat utilization system when viewed from above.

[0053] Figure 8 The present invention is a schematic diagram of a glass fiber insulation board of a pulp molding thermoforming device with a waste heat utilization system.

[0054] Fig. 9 The present invention is a schematic diagram of an upper heating plate assembly structure of a pulp molding thermoforming device with a waste heat utilization system.

[0055] Fig.10 The present invention is a schematic diagram of a side view of a hot upper heating plate of a pulp molding thermoforming device with a waste heat utilization system.

[0056] Fig.11 It is a schematic diagram of the upward view of the hot pressing upper mold structure of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0057] Fig.12 This is a schematic diagram of a front view of a heating rod of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0058] Fig.13 This is a schematic diagram of a left view of a heating rod of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0059] Fig.14 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 with a waste heat utilization system of the present invention.

[0060] Fig.15 This is a schematic diagram from the left side showing the connection between the hot pressing lower mold heating system and the waste heat utilization system of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0061] Fig.16 The present invention is a schematic diagram of a top view of a hot pressing lower mold of a pulp molding thermoforming device with a waste heat utilization system.

[0062] Fig.17 It 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 with a waste heat utilization system of the present invention.

[0063] Fig.18 The present invention is a schematic top view of the connection between a hot lower heating plate and a hot lower glass fiber insulation board 1 and a hot lower glass fiber insulation board 2 of a pulp molding thermoforming device with a waste heat utilization system.

[0064] Fig.19 This is a schematic diagram of the main view of the connection between the first-stage steam header and the hot air support insulation board of a pulp molding thermoforming device with a waste heat utilization system of the present invention.

[0065] Fig. 20 This is a schematic diagram of the main view of a first-stage steam header of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0066] Fig.21 The present invention is a schematic diagram of a top view of a primary steam manifold of a pulp molding thermoforming device with a waste heat utilization system.

[0067] Fig. 22 This is a schematic diagram of the left-side structure of a first-stage steam header of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0068] Fig.23 The present invention is a schematic diagram of the internal structure of a load-bearing base of a pulp molding thermoforming device with a waste heat utilization system.

[0069] Fig.24 This is a schematic diagram of a front view of a waste heat utilization system of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0070] Fig.25 It is a schematic diagram of a rear view of a waste heat utilization system of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0071] Fig.26 This is a schematic diagram of a left view of a waste heat utilization system of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0072] Fig. 27 This is a schematic diagram of a right view of a waste heat utilization system of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0073] Fig.28 The schematic diagram of the structure of the steam-water separation system of the pulp molding thermoforming device with a waste heat utilization system of the present invention.

[0074] Fig.29 The present invention is a schematic diagram of a structure of a steam-water separator of a pulp molding thermoforming device with a waste heat utilization system.

[0075] Fig.30 This is a schematic diagram of a top view of a slide structure of a pulp molding thermoforming device with a waste heat utilization system according to the present invention.

[0076] Fig.31 This is a schematic diagram of the right view of the slide structure of a pulp molding thermoforming device with a waste heat utilization system of the present invention.

[0077] 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, 10-fixed plate, 11-hot upper air support insulation board, 12-isolation protection board, 13-heating rod power supply protection shell, 14-fastening screws, 15-hot pressing upper mold, 16-hot upper glass fiber insulation board 1, 17-hot upper glass fiber insulation board 2, 18-hot upper heating plate, 19-heating rod, 20-bottom fixed plate, 21-support Column, 22-insulation board, 23-threaded hole, 24-countersunk through hole, 25-through hole 1, 26-fixing ring, 27-positive power supply, 28-negative power supply, 29-ear hole, 30-heating element, 31-shell, 32-hot pressing lower mold, 33-hot air support insulation board, 34-suction joint pipe, 35-load-bearing base, 36-slider, 37-transfer plate, 38-heat exchange exhaust gas external exhaust pipe, 39-steam-water separator fixing plate, 40-steam-water separator 1, 41-steam-water separator 2, 42-hot heating plate, 43-hot fiberglass insulation board 1, 4 4-hot glass fiber insulation board 2, 45-vent 1, 46-vent 2, 47-primary steam header, 48-steam inlet, 49-extension pipe, 50-inlet connection flange, 51-flange sealing ring, 52-butt flange, 53-tapered connecting pipe, 54-threaded through hole, 55-sealing ring, 56-heat exchange area, 57-heat exchanger, 58-heat exchanger clamp, 59-circulation inlet pipe, 60-circulation outlet pipe, 61-partition, 62-high temperature air inlet header, 63-semicircle clamp, 64-cold water inlet, 65-cold air inlet, 66-through Hole 2, 67-branch pipe, 68-high-temperature air inlet pipe, 69-high-temperature water vapor inlet pipe, 70-exhaust gas joint pipe, 71-hot water outlet, 72-hot gas outlet, 73-secondary steam header, 74-high-temperature water vapor inlet pipe, 75-exhaust outlet, 76-inlet gradually narrowing pipe, 78-inlet gradually widening pipe, 79-steam separator inlet pipe, 80-dry air outlet, 81-gas storage tank, 82-liquidity meter, 83-high-temperature wet air inlet, 84-base, 85-drain outlet, 86-wastewater outlet, 87-frame, 88-guide rail, 89-transfer plate fixing block. DETAILED DESCRIPTION

[0078] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0079] See also Figures 1 to 31The present invention provides a technical solution: a pulp molding thermoforming device with a waste heat utilization system, 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 with the molding machine upper shell 1 through four columns 8 on the upper end, the hydraulic system 2 is fixed to the top center position of the molding machine upper shell 1 by screws, the molding machine upper mold heating system 3 is fixed on the lower side of the molding machine upper shell 1, the molding machine lower shell 7 is installed on the upper side of the slide 6, the waste heat utilization system 5 is installed on the upper side of the slide 6, the waste heat utilization system 5 is fixed on the upper side of the waste heat utilization system 5, the hot pressing lower mold heating system 4 is fixed, the hot pressing upper mold heating system 3, the hot pressing lower mold heating system 4, the waste heat utilization system 5 and the slide 6 are all fixed between the molding machine upper shell 1 and the molding machine lower shell 7, and two columns 8 are equidistantly distributed on both sides of the surface of the molding machine lower shell 7 for supporting the molding machine upper shell 1, and sufficient working space is supported between the two.

[0080] See also Figures 1 to 13 The hot pressing upper mold heating system 3 includes a fixing plate 10, a hot upper air support insulation plate 11, a hot upper glass fiber insulation plate 16, a hot upper glass fiber insulation plate 2 17, a hot upper heating plate 18, a heating rod 19, a heating rod power protection shell 13, an isolation protection plate 12 and a hot pressing upper mold 15 in order from top to bottom according to the assembly method;

[0081] The heat insulation board 22 in the upper air support heat insulation board 11 and the upper glass fiber heat insulation board 1 16, the upper glass fiber heat insulation board 2 17 and the upper heating board 18 have the same length and width dimensions on the working surface, and the through hole 1 25 arranged on the working surface has the same structure and position;

[0082] The upper air support insulation board 11 includes a bottom fixing board 20, a support column 21 and an insulation board 22. The lower side of the bottom fixing board 20 is welded to the upper surface of the insulation board 22 through a plurality of support columns 21 distributed at equal intervals. The side wall of the insulation board 22 is provided with a plurality of threaded holes 23.

[0083] The upper surface of the bottom fixing plate 20 is provided with a plurality of countersunk through holes 24 distributed in a Japanese-shaped structure downwardly, and the plurality of countersunk through holes 24 are used to correspond to the threaded holes 23 on the working surface of the fixing plate 10 and can be tightly connected by the action of the fastening screws 14;

[0084] The plurality of support columns 21 are cylinders of equal height and diameter, and are used to prop up the support insulation board 22 and the bottom fixed board 20 and form an insulation space therebetween. The upper glass fiber insulation board 1 16 and the upper glass fiber insulation board 2 17 are both made of glass fiber material and a highly heat-resistant composite material, and have high mechanical properties and good heat resistance, and can be used to isolate the energy dissipation of heat from the upper heating board 18 to the non-working surface.

[0085] The heating rod 19 includes a fixing ring 26, a positive power supply electrode 27, a negative power supply electrode 28, an ear hole 29, a heating element 30 and a housing 31;

[0086] The heating element 30 and the housing 31 as the working body of the heating rod 19 are equidistantly arranged inside the heating plate 18 and distributed on the front and rear sides. The side wall of the heating plate 18 is also provided with a threaded hole 23. The fixing ring 26 and the ear hole 29 as the fixing parts of the heating rod 19 are locked to the side wall of the heating plate 18 by fastening the screws 14 and the threaded holes 23. The side wall of the air-supported heat-insulating plate 11 is provided with screw holes of the same specification as the threaded holes 23 for fixing the heating rod power supply protection shell 13 and the isolation protection plate 12;

[0087] The upper side of the hot pressing upper mold 15 is successively installed with a hot heating plate 18, a hot fiberglass insulation board 16, a hot fiberglass insulation board 2 17, and a hot air support insulation board 11 through long screws. The upper end of the hot air support insulation board 11 is fixedly connected to the lower end of the fixed plate 10 through long screws. During actual operation, the movement of the hot pressing upper mold heating system 3 in the vertical direction can be controlled by controlling the extension and shortening of the piston rod in the hydraulic system 2.

[0088] The hydraulic system 2 is parallel to the hot pressing upper die heating system 3 in the height direction and tangent to each other in the vertical direction. The hydraulic system 2 includes a set of hydraulic cylinders and four guide columns.

[0089] The hydraulic system 2 penetrates the upper shell 1 of the molding machine in the vertical direction and is connected to the fixed plate 10 in the hot pressing upper mold heating system 3 through a threaded flange and screws. The piston rod in a set of hydraulic cylinders is mainly used to realize the movement of the fixed plate 10 in the vertical direction, and the four guide columns are used to realize the horizontal positioning of the fixed plate 10;

[0090] The upper end of the fixing plate 10 is divided into an inverted table structure. The size of the lowermost part of the fixing plate 10 is the same as that of the hot air support insulation plate 11, and a large number of internal threaded blind holes are provided on the upper side of the fixing plate 10 for fixed connection with the lower end of the piston rod.

[0091] As the first embodiment of the present invention, in actual use, the hot pressing lower mold heating system 4 located on the upper side of the lower shell 7 of the molding machine and the hot pressing upper mold heating system 3 on the lower side of the upper shell 1 of the molding machine are molded in cooperation with the hydraulic system 2. Specifically, when the equipment is started, the structure of multiple heating rods 19 installed in the hot upper heating plate 18 of the hot pressing upper mold 15 is started synchronously. Please refer to the attached drawings of the specification for details. Its working principle is the prior art and will not be repeated here. At the same time, multiple heating rods 19 installed in the hot lower heating plate 42 of the hot pressing lower mold 32 are also started synchronously. The hydraulic system 2 drives the fixed plate 10 to move in the vertical direction through a group of piston rods in the hydraulic cylinder. Due to the fixed plate 10 The board 10 is fixedly connected to the hot pressing upper mold 15 through the upper hot glass fiber insulation board 1 16, the upper hot glass fiber insulation board 2 17 and the upper hot air support insulation board 11. The fixed board 10 simultaneously drives the upper hot glass fiber insulation board 1 16, the upper hot glass fiber insulation board 2 17, the upper hot air support insulation board 11 and the hot pressing upper mold 15 to move vertically. The hot pressing lower mold 32 is fixed to the upper side of the load-bearing base 35 through the lower hot air support insulation board 33, the lower hot heating plate 42, the lower hot glass fiber insulation board 1 43 and the lower hot glass fiber insulation board 2 44. When the hot pressing upper mold heating system 3 moves downward and contacts with the hot pressing lower mold heating system 4, the mold is closed, which is the same as the pulp molding principle in the prior art.

[0092] See also Figures 1 to 11 The hot pressing lower mold heating system 4 includes, from bottom to top, 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 in order according to the assembly method;

[0093] A lower hot glass fiber insulation board 1 43 and a lower hot glass fiber insulation board 2 44 are fixed to the upper side of the hot air supporting insulation board 33 by long screws, and a hot pressing lower mold 32 is fixed to the upper side of the hot air supporting insulation board 33 by long screws and the lower hot glass fiber insulation board 1 43 and the lower hot glass fiber insulation board 2 44. In actual use, the structure and installation method of the hot pressing lower mold heating system 4 are slightly different from those of the hot pressing upper mold heating system 3. First of all, compared with the corresponding parts of the hot pressing upper mold heating system 3, the lower hot air supporting insulation board 33, the lower hot glass fiber insulation board 1 43, the lower hot glass fiber insulation board 2 44 and the lower hot heating plate 42 only have an additional vent hole 1 45 for removing the water vapor generated during the closing and drying process of the hot pressing upper mold 15 and the hot pressing lower mold 32.

[0094] The second difference is that the hot pressing lower mold 32 is equipped with a hot lower heating plate 42 of the heating rod 19, a hot lower glass fiber insulation board 1 43, a hot lower glass fiber insulation board 2 44, and a hot lower air support insulation board 33, which are sequentially installed on the load-bearing base 35 by long screws, and the heating rod power supply protection shell 13 and the isolation protection board 12 are fixed to the threaded holes 23 of the hot lower air support insulation board 33 and the hot lower heating plate 42 by fastening screws;

[0095] 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 11, and the heating rod power supply protection shell 13 and the heating rod 19 are also installed inside the hot pressing lower mold 32. The structure and size of the heating rod power supply protection shell 13 and the heating rod 19 at the two positions are the same.

[0096] As a second embodiment of the present invention, by opening a vent hole 45 on the hot pressing lower mold 32 and cooperating with the waste heat utilization system 5, the water vapor generated during the mold closing and drying process of the hot pressing upper mold 15 and the hot pressing lower mold 32 can be introduced into the waste heat utilization system 5, thereby achieving 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 mold closing and drying process of the hot pressing upper mold 15 and the hot pressing lower mold 32 to be quickly and evenly discharged, thereby avoiding affecting the normal mold closing and drying process, and also avoiding 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.

[0097] See also Figure 1 , Figure 2 as well as Figures 14 to 29 The waste heat utilization system 5 includes a primary steam header 47, a secondary steam header 73, a steam-water separation system 9, and a load-bearing base 35 in order from bottom to top according to the operation mode. Multiple groups of primary 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 pressing air support insulation board 33;

[0098] 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, and the front end of the second-stage steam header 73 is connected to the high-temperature steam inlet pipe 69;

[0099] 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. The right end of the high-temperature steam inlet pipe 69 is connected to the steam-water separator 1 40 through the steam-water separator air inlet pipe 79 on the left side. The steam-water separator 1 40 is connected to the steam-water separator 2 41 through the steam-water separator air inlet pipe 79 on the right side. The steam-water separator 2 41 is connected to the high-temperature air inlet pipe 68 through the dry air outlet pipe 80.

[0100] The rear side of the high-temperature air inlet pipe 68 is connected to the high-temperature air inlet manifold 62, and the left side of the high-temperature air inlet manifold 62 is connected to the right end of the load-bearing base 35. A plurality of heat exchangers 57 are evenly installed inside the front side and the rear side of the load-bearing base 35;

[0101] The primary steam header 47 is a round tube, with four groups in total. One end of the primary steam header 47 is welded and sealed by a round metal sheet of equal diameter, and a docking flange 52 is installed at the other end of the primary steam header 47. Four groups of steam inlets 48 are equidistantly arranged on the upper side of the column of the primary steam header 47 to guide the high-temperature steam generated in the pulp molding drying process into the primary steam header 47;

[0102] The steam inlet 48 includes an extension pipe 49, an inlet connection flange 50, a flange sealing ring 51 and a tapered connection pipe 53, and the extension pipe 49, the inlet connection flange 50, the flange sealing ring 51 and the tapered connection pipe 53 are connected in sequence by welding and fixed to the upper side of the pipe body of the first-stage steam header 47;

[0103] The inlet connection flange 50 and the docking flange 52 are both provided with threaded through holes 54. The inlet connection flange 50 is connected to the working back side of the hot lower air support insulation board 33 through screws and threaded through holes 54. The docking flange 52 is connected to the flanges on the four high-temperature water vapor inlet pipes 74 in the secondary steam inlet manifold 73 through screws and threaded through holes 54. In the actual operation process, the water vapor generated in the process of mold closing and drying by the hot pressing upper mold heating system 3 and the hot pressing lower mold heating system 4 passes through the vent hole 45 in sequence through the primary steam inlet manifold 47, the secondary steam inlet manifold 73, The high-temperature water vapor inlet pipe 69 enters the steam-water separation system 9 to complete steam-water separation, and then the high-temperature air enters the heat exchange area 56 through the high-temperature air inlet manifold 62 to complete heat exchange with the heat exchange medium in the heat exchanger 57, and is finally discharged 75 from the waste gas port of the waste gas joint 70. The heat exchange medium completes heat exchange through the cold water inlet 64, the cold air inlet 65, the circulation inlet pipe 59, and the heat exchanger 57 in turn, and is finally output through the circulation outlet pipe 60 and the hot water outlet 71 and the hot air outlet 72 to drive an external absorption refrigerator for summer cooling or as a drying heat source for paper trays of some non-fine pulp molding products.

[0104] As the third embodiment of the present invention, based on the above-mentioned second embodiment, the high-temperature water vapor entering the secondary steam inlet 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-water separator inlet pipeline 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 another part of the steam-water separator inlet pipeline 79. In the second water-vapor separator 41, the high-temperature gas that has been separated once is separated again for water vapor, so that the drier 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 base 35 through the branch pipe 67. The end of the high-temperature air inlet header 62 is connected to the high-temperature air inlet pipe 68 by welding to form the intake end structure of the high-temperature air in the heat part of the entire waste heat utilization system 5. The water-vapor separation system 9 continuously separates the high-temperature water vapor twice by setting the first water-vapor separator 40 and the second water-vapor separator 41, so that it enters the load 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 base 35, ensure that the heat exchange efficiency is always at a relatively high level, and there is no need to perform additional treatment on the condensed water subsequently, which greatly facilitates the maintenance of subsequent equipment. The structure and working principle of the first water-vapor separator 40 are the same as those of the second water-vapor separator 41. After the water vapor enters the gas storage tank 81 of the first water-vapor separator 41, the water in the water vapor dissolves in the water inside the gas storage tank 81, and the high-temperature gas jumps out of the water surface and is discharged through the dry air outlet pipe 80 at its top. The base at the bottom of the gas storage tank 81 is provided with a sewage outlet 85 and a waste water outlet 86 for cleaning the gas storage tank 81.

[0105] Please refer to Figures 14 to 29 , a rubber seal ring 55 with a "day" - shaped structure is installed on the upper side of the load base 35. The structure of the seal ring 55 matches the distribution structure of the first vent hole 45. The load base 35 is a cuboid cast iron box body, which is the core structure of the waste heat utilization system 5. A support beam is provided inside the load base 35, which can be used to strengthen the support force of the working surface of the box body and can divide the entire cast iron box body into two heat exchange areas 56;

[0106] A plurality of partitions 61 are arranged at equal distances on the side walls of the front and rear sides of the two heat exchange zones 56 so that the two heat exchange zones 56 have a serpentine flow channel structure for enhancing the heat exchange efficiency of the heat exchanger 57. A plurality of staggered heat exchangers 57 are arranged 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 clamps 58. The plurality of heat exchangers 57 in the same heat exchange zone 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 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.

[0107] 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 intake manifold 73, and the right side of the load-bearing base 35 is provided with a high-temperature air intake manifold 62 with arc groove reinforcement ribs. The secondary steam intake manifold 73 and the high-temperature air intake manifold 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.

[0108] Four curved high-temperature steam inlet pipes 74 and the suction pipe 34 extending outward from the surface of the secondary steam inlet manifold 73 are connected to the docking flange 52 of the primary steam inlet manifold 47, and the end of the secondary steam inlet manifold 73 is connected to the high-temperature steam inlet pipe 69 by welding to form the inlet end structure of the high-temperature steam in the hot part of the entire waste heat utilization system 5;

[0109] 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-carrying base 35. The end of the high-temperature air intake manifold 62 is connected to the high-temperature air intake pipe 68 by welding to form the intake end structure of the high-temperature air in the hot part of the entire waste heat utilization system 5.

[0110] The leftmost ends of the two heat exchange areas 56 are provided with two sets of exhaust holes downwardly for connecting to the exhaust gas joint pipe 70, and the end of the exhaust gas joint pipe 70 is provided with an exhaust gas port 75;

[0111] The steam-water separator 40 includes a dry air outlet pipe 80, an air storage tank 81, a liquid meter 82, a high-temperature humid air inlet 83 and a base 84. The high-temperature humid air inlet 83 is provided on the side wall of the air storage tank 81, the liquid meter 82 is installed on the right side of the air storage tank 81, the base 84 is provided at the lower end of the air storage tank 81, a sewage outlet 85 and a wastewater outlet 86 are provided at the lower end of the air storage tank 81 through the base 84, and a dry air outlet pipe 81 is provided on the top of the air storage tank 81;

[0112] The steam-water separator 1 40 is connected to the steam-water separator 2 41 through a circulation pipeline. 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 tapering 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 widening pipe 78.

[0113] As a fourth embodiment of the present invention, based on the third embodiment, a plurality of heat exchangers 57 in the heat exchange zone 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 a 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 zones 56 synchronously through a plurality of branch pipes 67, the high-temperature dry gas moves rapidly from the right end to the left end of the two heat exchange zones 56 of the load-bearing base 35. Since a plurality of partitions are evenly arranged on the side walls of the front and rear sides of the two heat exchange zones 56, 61 makes the two heat exchange areas 56 both present a serpentine flow channel structure. Multiple 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 heat exchanger clamps 58. The multiple 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 multiple circulation inlet pipes 59 and multiple circulation outlet pipes 60, forming two serpentine heat exchange paths. When the dry high-temperature gas enters the two heat exchange areas 56 through multiple 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, and under the synergistic effect 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, and 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 flowing high-temperature dry gas in the heat exchange area 56. Under the characteristic of rapid radiation transmission 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-carrying 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 molding 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 connecting pipe 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, which is convenient for the subsequent reuse of the waste heat, and also effectively avoids the energy waste and environmental pollution caused by the direct discharge of steam.

[0114] See also Figure 1 Figure 2 as well as Figure 30 to Figure 31 The sliding table 6, according to the operating mode, successively includes a frame 87, guide rails 88, sliders 36, a transfer plate 37, and a transfer plate fixing block 89 from bottom to top;

[0115] The frame 87 includes three cross beams and two main beams, and the three cross beams and two main beams are all load-bearing aluminum alloy frame profiles. The frame 87 has a "day" - shaped structure. The frame 87 is fastened to the center position of the lower housing 7 of the molding machine by screws and angle codes from left to right. The highest surface of the frame 87 is at the same horizontal position as the highest surface of the lower housing 7 of the molding machine;

[0116] The two main beams of the frame 87 penetrate through the lower housing 7 of the molding machine between the frame 87 and the waste heat utilization system 5 from left to right, and are fixed to the front and rear sides of the lower housing 7 of the molding machine by screws and angle codes. The cross beam in the center of the frame 87 is located on the left side between the lower housing 7 of the molding machine and the waste heat utilization system 5, and the other two cross beams are respectively located at the left and right ends of the lower housing 7 of the molding machine;

[0117] There are two main beams for the guide rails 88 and the frame 87, and the guide rails 88 are fixed to the upper sides of the two main beams of the frame 87 by screws through the threaded holes 3 in the center of the guide rails 88. Three groups of sliders 36 with a rectangular structure are slidably installed on the upper side of each guide rail 88. The upper sides of the six groups of sliders 36 are fixed with a transfer plate 37 by screws.

[0118] As the fifth embodiment of the present invention, in actual use, the frame 87 is slidably installed on the guide rails 88 through multiple sliders 36. The first steam separator 40 and the second steam separator 41 are respectively installed on the right side of the lower surface of the transfer plate 37 and placed inside the frame 87, and there will be no movement interference during movement. See the attached drawings of the specification. When it is necessary to move the hot pressing lower die heating system 4 and the waste heat utilization system 5, they are driven by an external driving device such as a cylinder or an electric cylinder, as long as it meets the requirements of linear reciprocating motion and usage. Specifically, it is selected according to the actual usage requirements, so that the transfer plate 37 moves left and right on the slide rails 88 on the upper side of the frame 87 to meet the requirements of loading and unloading.

[0119] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pulp molding thermoforming device with a waste heat utilization system, 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 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 hot pressing upper mold heating system (3), the hot pressing lower mold heating system (4), the waste heat utilization system (5) and the slide table (6) are all fixed between the upper shell (1) and the lower shell (7) of the molding machine; Two upright posts (8) are equidistantly distributed on both sides of the surface of the lower shell (7) of the molding machine for supporting the upper shell (1) of the molding machine and providing a sufficient working space between the two.

2. A pulp molding thermoforming device with a waste heat utilization system as claimed in claim 1, characterized in that: The hot pressing upper mold heating system (3) comprises, in order from top to bottom according to the assembly method, a fixing plate (10), a hot upper air support insulation plate (11), a hot upper glass fiber insulation plate 1 (16), a hot upper glass fiber insulation plate 2 (17), a hot upper heating plate (18), a heating rod (19), a heating rod power supply protection shell (13), an isolation protection plate (12) and a hot pressing upper mold (15); The heat insulation board (22) in the upper air support heat insulation board (11) is completely identical in length and width to the upper glass fiber heat insulation board 1 (16), the upper glass fiber heat insulation board 2 (17) and the upper heating board (18) on the working surface, and the structure and position of the through hole 1 (25) arranged on the working surface are also completely identical; The hot upper air support insulation board (11) comprises a bottom fixing board (20), a support column (21) and an insulation board (22); the lower side of the bottom fixing board (20) is welded to the upper surface of the insulation board (22) via a plurality of support columns (21) distributed at equal intervals; and a plurality of threaded holes (23) are provided on the side wall of the insulation board (22); The upper surface of the bottom fixing plate (20) is provided with a plurality of countersunk through holes (24) distributed in a spherical shape, the plurality of countersunk through holes (24) being used to correspond to the threaded holes (23) on the working surface of the connecting fixing plate (10) and the two can be tightly connected under the action of the fastening screws (14); The plurality of support columns (21) are cylindrical columns of equal height and diameter, and are used to support the supporting insulation board (22) and the bottom fixed board (20) and form an insulation space therebetween. The first thermal glass fiber insulation board (16) and the second thermal glass fiber insulation board (17) are both made of glass fiber material and a composite material with high heat resistance.

3. A pulp molding thermoforming device with a waste heat utilization system as claimed in claim 2, characterized in that: The heating rod (19) comprises a fixing ring (26), a positive power electrode (27), a negative power electrode (28), an ear hole (29), a heating element (30) and a housing (31); The heating element (30) and the outer shell (31) as the working body of the heating rod (19) are equidistantly arranged inside the heating plate (18) and distributed on the front and rear sides. The side wall of the heating plate (18) is also provided with a threaded hole (23). The fixing ring (26) and the ear hole (29) as the fixing parts of the heating rod (19) are locked to the side wall of the heating plate (18) by fastening screws (14) and threaded holes (23). The side wall of the air-supported heat-insulating plate (11) is provided with a screw hole of the same specification as the threaded hole (23) for fixing the heating rod power supply protection shell (13) and the isolation protection plate (12); The upper side of the hot pressing upper mold (15) is sequentially mounted with a hot upper heating plate (18), a hot upper glass fiber insulation plate 1 (16), a hot upper glass fiber insulation plate 2 (17), and a hot upper air support insulation plate (11) by means of long screws. The upper end of the hot upper air support insulation plate (11) is fixedly connected to the lower end of the fixing plate (10) by means of long screws. During actual operation, the movement of the hot pressing upper mold heating system (3) in the vertical direction can be controlled by controlling the extension and contraction of the piston rod in the hydraulic system (2).

4. A pulp molding thermoforming device with a waste heat utilization system as claimed in claim 2, characterized in that: The hydraulic system (2) is parallel to the hot pressing upper die heating system (3) in the height direction and tangent to each other in the vertical direction, and the hydraulic system comprises a group of hydraulic cylinders and four guide columns; The hydraulic system penetrates the upper shell (1) of the molding machine in the vertical direction and is connected to the fixed plate (10) in the hot pressing upper mold heating system (3) through a threaded flange and screws, wherein a piston rod in a set of the hydraulic cylinders is mainly used to realize the movement of the fixed plate (10) in the vertical direction, and the four guide pillars are used to realize the horizontal positioning of the fixed plate (10); The upper end of the fixing plate (10) is divided into an inverted table structure, the size of the lowermost part of the fixing plate (10) is the same as the size of the hot upper air support insulation plate (11), and a large number of internal threaded blind holes are provided on the upper side of the fixing plate (10) for fixed connection with the lower end of the piston rod.

5. The pulp molding thermoforming device with a waste heat utilization system as claimed in 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 supporting heat insulation board (33) is fixed with a hot lower glass fiber heat insulation board 1 (43) and a hot lower glass fiber heat insulation board 2 (44) by long screws, and the upper side of the hot lower air supporting heat insulation board (33) is fixed with a hot pressing lower mold (32) by long screws and the hot lower glass fiber heat insulation board 1 (43) and the hot lower glass fiber heat insulation board 2 (44).

6. A pulp molding thermoforming device with a waste heat utilization system as claimed in claim 5, characterized in that: The waste heat utilization system (5) includes, from bottom to top according to the operation mode, a primary steam header (47), a secondary steam header (73), a steam-water separation system (9), and a load-bearing base (35); a plurality of groups of the primary steam headers (47) are connected to the interior of the hot pressing lower mold (32) through a vent hole 1 (45) on the hot pressing lower mold (32) and a vent hole 2 (46) on the hot lower air support insulation board (33); The left end of each group of the 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 manifold (34). 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 first steam - water separator (40) and a second steam - water separator (41). The specifications of the first steam - water separator (40) are the same as those of the second steam - water separator (41). The right end of the high - temperature steam inlet pipe (69) is connected to the first steam - water separator (40) through the left - hand part of the steam - water separator inlet pipe (79). The first steam - water separator (40) is connected to the second steam - water separator (41) through the right - hand part of the steam - water separator inlet pipe (79). 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 header (62). The left side of the high - temperature air inlet header (62) is connected to the right end of the load - bearing base (35). Inside the front side and the rear side of the load - bearing base (35), a plurality of heat exchangers (57) are equidistantly installed. The first - stage steam header (47) is a kind of round pipe, and there are four groups in total. One end of the first - stage steam header (47) is welded and sealed by a circular metal sheet with the same diameter. The other end of the first - stage steam header (47) is equipped with a butt flange (52). On the upper side of the cylinder body of the first - stage steam header (47), four groups of steam inlets (48) are equidistantly arranged 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 tapered connection pipe (53). The extension pipe (49), the inlet connection flange (50), the flange sealing ring (51), and the tapered 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 - insulating 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 inlet header (73) through screws and the threaded through - holes (54).

7. A pulp molding thermoforming device with a waste heat utilization system as claimed in claim 6, characterized in that: On the upper side of the load - bearing base (35), a rubber - material sealing ring (55) with a "day" - shaped structure is installed. The structure of the sealing ring (55) matches the distribution structure of the first ventilation holes (45). The load - bearing base (35) is a kind of rectangular - shaped cast - iron box body. Inside the load - bearing base (35), there is a support beam that can be used to strengthen the supporting force of the working surface of the box body and can divide the entire cast - iron box body into two heat - exchange zones (56). A plurality of partitions (61) are arranged at equal distances on the side walls of the front and rear sides of the two heat exchange areas (56), so that the two heat exchange areas (56) both present a serpentine flow channel structure for enhancing the heat exchange efficiency of the heat exchanger (57); a plurality of staggered heat exchangers (57) are arranged inside the two heat exchange areas (56) and are fixed to the front and rear side walls of the two heat exchange areas (56) by heat exchanger clamps (58); The plurality of heat exchangers (57) in the same heat exchange zone (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) via the plurality of circulation inlet pipes (59) and the plurality of circulation outlet pipes (60) to form the cold part structure of the entire waste heat utilization system (5). 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 a secondary steam intake manifold (73); the right side of the load-bearing base (35) is provided with a high-temperature air intake manifold (62) with arc groove reinforcement ribs; The secondary steam intake manifold (73) and the high-temperature air intake manifold (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 with a waste heat utilization system as claimed in claim 7, characterized in that: Four curved high-temperature steam inlet pipes (74) extending outward from the surface of the secondary steam inlet manifold (73) and a suction pipe (34) are connected to the docking flange (52) of the primary steam inlet manifold (47); At the same time, the end of the secondary steam intake manifold (73) is connected to the high-temperature steam intake pipe (69) by welding, thereby forming an intake end structure of the high-temperature steam in the 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 an intake end structure of the high-temperature air in 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 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); The steam-water separator (40) comprises a dry air outlet pipe (80), an air storage tank (81), a liquid meter (82), a high-temperature humid air inlet (83) and a base (84); the high-temperature humid air inlet (83) is arranged on a side wall of the air storage tank (81), and the liquid meter (82) is installed on the right side of the air storage tank (81); The lower end of the gas storage tank (81) is provided with a base (84), the lower end of the gas storage tank (81) is provided with a sewage outlet (85) and a wastewater outlet (86) through the base (84), and the top of the gas storage tank (81) is provided with a dry air outlet pipe (81); A steam-water separator one (40) and a steam-water separator two (41) are connected through a circulation pipeline. The air inlet end of the steam-water separator one (40) is connected to a high-temperature steam inlet pipe (69) through a reducing air inlet pipe (76), and the air outlet end of the steam-water separator two (41) is connected to a high-temperature air inlet pipe (68) through an expanding air inlet pipe (78).

9. The pulp molding thermoforming device with a waste heat utilization system as claimed in claim 1, characterized in that: The sliding table (6) sequentially includes a frame (87), a guide rail (88), a slider (36), a transfer plate (37), and a transfer plate fixing block (89) from bottom to top according to the operation mode. The frame (87) includes three cross beams and two main beams, and the three cross beams and the two main beams are all load-bearing aluminum alloy frame profiles. The frame (87) has an "8" - shaped structure. The frame (87) is fastened to the center position of the lower shell (7) of the molding machine by screws and angle codes from left to right. The highest surface of the frame (87) is at the same horizontal position as the highest surface of the lower shell (7) of the molding machine. The two main beams of the frame (87) penetrate between the lower shell (7) of the molding machine and the waste heat utilization system (5) from left to right and are fixed to the front and rear sides of the lower shell (7) of the molding machine by screws and angle codes. The cross beam at the center of the frame (87) is located on the left side between the lower shell (7) of the molding machine and the waste heat utilization system (5), and the other two cross beams are respectively located at the left and right ends of the lower shell (7) of the molding machine. The guide rail (88) and the frame (87) have two main beams, and are fixed to the upper sides of the two main beams of the frame (87) by screws through the threaded holes (3) at the center of the guide rail (88). Three groups of rectangular sliders (36) are slidably installed on the upper side of each guide rail (88), and a transfer plate (37) is fixed to the upper sides of the six groups of sliders (36) by screws.

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