Waste heat utilization type drying room

Abstract

The utility model discloses a waste heat utilization type drying room. The waste heat utilization type drying room comprises a drying room body, an air supply assembly and a heat exchanger, wherein the air supply assembly is used for supplying air to the drying room body so as to dry demolded EPP formed parts; the heat exchanger is used for heating cold air introduced by the air supply assembly into hot air; the heat exchanger is provided with a heat exchanger air inlet and a heat exchanger air outlet, the heat exchanger is installed on the side wall of the drying room body, and the air supply assembly is integrally arranged at the heat exchanger air inlet; the drying room body is provided with the heat exchanger and the air supply assembly, waste heat can be automatically utilized to heat inlet air, external hot air does not need to be connected, and the use cost is effectively reduced. Various waste heat in the production process can be effectively utilized as a heat source for heat exchange, the production cost is reduced, and the resource utilization rate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of EPP material molding and relates to a waste heat utilization type drying room. Background Art

[0002] EPP (Expanded polypropylene), also known as expanded polypropylene, is the abbreviation of a new type of foam plastic. EPP polypropylene plastic foam material is a highly crystalline polymer / gas composite material with excellent performance. With its unique and superior performance, it has become the fastest growing environmentally friendly new type of pressure-resistant buffer insulation material. EPP is also an environmentally friendly material that can be recycled and reused. Compared with EPS (expanded polystyrene), EPP has higher mechanical strength, which greatly expands the application scenarios of foam plastics. Therefore, it is widely used in daily necessities, packaging, industry, agriculture, transportation, military industry, and aerospace industry. EPP raw materials need to be initially formed by high-temperature foaming in the mold, and then the entire mold is cooled and demolded to obtain EPP molded parts. In the common molding and production process of EPP materials, cooling and demolding are mostly carried out by water cooling, which results in a large amount of water stains remaining on the surface of the EPP molded parts after demolding. Therefore, a corresponding drying room is required to dry the EPP molded parts.

[0003] At present, domestic EPP molding workshops use new steam from molding boilers to bake and shape EPP products, which consumes a lot of energy and has high production costs. The temperature of the cooling water during demoulding of EPP molded parts will rise to about 70°C after cooling the EPP molded parts. The heated cooling water needs to be cooled before the next cycle of cooling can be carried out, which results in waste of waste heat of cooling water and increases production costs.

[0004] To solve the above problems, a drying room is needed, which has the function of utilizing waste heat to generate hot air through waste heat heating to heat and dry EPP molded parts, so as to reduce production costs and improve resource utilization. Utility Model Content

[0005] In view of this, the present invention provides a waste heat utilization drying room, in which an air supply component and a heat exchanger are arranged. The built-in heat exchanger can effectively utilize various waste heat in the production process for heat exchange to obtain hot air and dry EPP molded parts, effectively reducing production costs and improving resource utilization.

[0006] The utility model discloses a waste heat utilization drying room, comprising a drying room body, an air supply assembly for supplying air to the drying room body to dry the EPP molded parts after demoulding, and a heat exchanger for heating the cold air introduced by the air supply assembly into hot air; the heat exchanger has a heat exchanger air inlet and a heat exchanger air outlet, the heat exchanger is installed on the side wall of the drying room body, and the air supply assembly is integrally arranged at the heat exchanger air inlet.

[0007] Furthermore, the heat exchanger includes a heat exchange tube and a heat exchanger bracket, and the heat exchange tube is installed on the upper part of the side wall of the drying room body through the heat exchanger bracket; the heat exchange tube has a heat exchanger inlet for the heat exchange medium to flow in and a heat exchanger outlet for the heat exchange medium to flow out, the heat exchanger inlet is located at the lower part of the heat exchanger, and the heat exchanger outlet is located at the upper part of the heat exchanger.

[0008] Furthermore, a shelf for placing demoulded EPP molded parts is arranged in the drying room body, and the shelf is a grid structure, and a plurality of the shelves are arranged from top to bottom.

[0009] Furthermore, the air supply component includes a first air supply fan and a second air supply fan, wherein the first air supply fan and the second air supply fan are both arranged at the air inlet of the heat exchanger, the first air supply fan is located below the second air supply fan, and the output power of the first air supply fan is greater than the output power of the second air supply fan.

[0010] Furthermore, the heat exchanger air outlet is arranged on the top of the drying room body in a downward opening manner, and a secondary fan is installed at the heat exchanger air outlet.

[0011] Furthermore, the drying room is also provided with an induced draft fan, which is installed at the lower part of the drying room body. The induced draft fan has an induced draft fan air inlet, which is arranged in the drying room body with an opening facing upward and is located at the bottom of the drying room body.

[0012] Furthermore, the heat exchanger includes a heat exchange tube and a heat exchanger bracket. The heat exchange tube is a flat tube. The heat exchange tube is bent continuously from bottom to top for multiple times to form a serpentine coil structure.

[0013] Furthermore, the air inlet of the induced draft fan is provided with an induced draft guide plate, and the induced draft guide plate is an arc-shaped surface with the middle portion concave toward the bottom surface of the drying room body.

[0014] Furthermore, the air outlet of the heat exchanger is provided with an upper air supply guide plate and a lower air supply guide plate, and the upper air supply guide plate is composed of a first guide surface and a second guide surface, the first guide surface is a plane inclined from front to rear, the front end of the first guide surface is inclined upward, and the rear end of the first guide surface is inclined downward and naturally transitioned to the second guide surface; the second guide surface is an arc surface with the middle part concave toward the top of the drying room body.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a waste heat utilization drying room. The drying room body is equipped with a heat exchanger and an air supply component. The waste heat can be used to heat the incoming air without external hot air, which effectively reduces the use cost. The utility model can effectively use various waste heat in the production process as a heat source for heat exchange, reducing production costs and improving resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the practical application of the utility model in the embodiment;

[0018] Figure 2 This is the main structural diagram of the drying room;

[0019] Figure 3 for Figure 2 Sectional view at AA;

[0020] Figure 4 Figure 3 Cross-sectional view at BB in the middle. DETAILED DESCRIPTION

[0021] It should be noted that, in the description of this specification, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The arrows in the figures all point to the medium flow direction of the corresponding medium. In the present embodiment, the various inlet and outlet structures are connected through pipelines, and valves and other structures can be correspondingly set on the pipeline to control the on-off of the pipeline. This is understandable to those skilled in the art and will not be elaborated here.

[0022] The present invention will be further described below in combination with actual production, taking the combined production of cooling, demoulding and drying of EPP molded parts as the background.

[0023] As shown in the figure, this embodiment includes:

[0024] A spray room 1, wherein the spray room 1 is provided with a spray rack for spraying water to cool down the undemolded EPP molded parts and a first water collection tank for collecting the spray water;

[0025] A drying room 2, the drying room 2 comprising an air supply assembly for supplying air to the drying room 2 to dry the EPP molded parts after demoulding and a heat exchanger 12 for heating the cold air introduced by the air supply assembly into hot air;

[0026] The first water collecting tank is provided with a first water outlet, and the heat exchanger 12 has a heat exchanger inlet 8. The first water outlet is connected to the heat exchanger inlet 8, and the spray water collected by the first water collecting tank can be driven into the heat exchanger 12 and exchange heat with the cold air introduced by the air supply component. The air supply component and the heat exchanger 12 are provided in the drying room 2, and the first water collecting tank is provided to collect the spray water and transport it to the heat exchanger 12 as a hot medium to heat the cold air to achieve the purpose of hot air drying the EPP molded parts. After the spray water sprays and cools the undemolded EPP molded parts, it is transported to the heat exchanger 12 as a heat source to heat the cold air, effectively utilizing the waste heat of the spray water, reducing production costs and improving resource utilization.

[0027] In this embodiment, a cooling water pool 3 is also included, wherein the cooling water pool 3 has a cooling water return pipe and a cooling water outlet pipe, the spray rack is provided with a spray water inlet pipe, the heat exchanger 12 is provided with a heat exchanger outlet 9, the cooling water outlet pipe is connected to the spray water inlet pipe, and the heat exchanger outlet 9 is connected to the cooling water return pipe. Such a setting enables the spray water to form a complete cycle, ensuring that the spray water is not wasted. The spray water can be pressurized by setting a water pump during the circulation process to make its flow smoother; in the process of recycling, the spray water will inevitably produce consumption losses, so a water replenishment pipeline can be set in the cooling water pool 3 to ensure the total amount of spray water. A cooling heat exchanger 12 can also be set in the cooling water return pipe to further cool the return water of the spray water to improve the cooling effect during subsequent use.

[0028] In this embodiment, the drying room 2 also includes a drying room body 4, and a shelf 5 for placing EPP molded parts after demolding is arranged in the drying room body 4. The heat exchanger 12 is installed on the drying room body 4, and the heat exchanger 12 has a heat exchanger 12 air inlet and a heat exchanger 12 air outlet. The air supply component includes a first air supply fan 10 and a second air supply fan 11. The first air supply fan 10 and the second air supply fan 11 are both arranged at the air inlet of the heat exchanger 12, and the first air supply fan 10 is located below the second air supply fan 11. The air outlet of the heat exchanger 12 is arranged at the top of the drying room body 4 in a downward opening manner, and a secondary fan 7 is installed at the air outlet of the heat exchanger 12. In this embodiment, the first blower 10, the second blower 11 and the secondary blower 7 are all industrial fans, and other air supply equipment such as blowers can also be used. The first blower 10 and the second blower 11 are used to blow cold air into the heat exchanger 12 for heat exchange to obtain hot air and send it to the air outlet of the heat exchanger 12. The secondary blower 7 introduces hot air into the drying room body 4 to dry the demoulded EPP molded parts. The output power of the first blower 10 is greater than the output power of the second blower 11. Because the inlet of the heat exchanger 12 is set at the bottom, the temperature at the bottom is higher than that at the top. The output power of the first blower 10 located at the bottom is set larger to ensure that more wind enters from the bottom and performs heat exchange to ensure that the obtained hot air meets the drying requirements. The storage rack 5 adopts a grid structure with good air permeability and small contact area, and can also ensure stable and reliable support.

[0029] In this embodiment, the drying room 2 is also provided with an induced draft fan 18, which is installed at the lower part of the drying room body 4. The induced draft fan 18 has an induced draft fan 18 air inlet 6, which is arranged in the drying room body 4 in an upward opening manner and is located at the bottom of the drying room body 4. The induced draft fan 18 air inlet 6 is provided with an induced draft guide plate 17, and the induced draft guide plate 17 is an arc-shaped curved surface with the middle part concave toward the bottom surface of the drying room body 4. The induced draft fan 18 is an industrial fan, and other blowing equipment such as a blower can also be used. The output power of the induced draft fan 18 is set to be not less than the sum of the powers of the first blower 10 and the second blower 11 to ensure that the hot air entering the drying room 2 version body can be completely discharged by the induced draft fan 18. The output power of the induced draft fan 18 is set to be slightly greater than the sum of the powers of the first blower 10 and the second blower 11, which is preferably to keep the drying room body 4 in a state of slight negative pressure during operation. The induced air guide plate 17 is designed as an arc surface, which can smoothly guide the hot air blown down vertically to a horizontal direction and be sucked out by the induced air fan 18, so that the gas flow in the drying room 2 is smoother.

[0030] In this embodiment, the heat exchanger 12 includes a heat exchange tube 13 and a heat exchanger bracket 14. The heat exchange tube 13 is a flat tube. The heat exchange tube 13 is bent from bottom to top for multiple times to form a serpentine coil structure. The heat exchanger inlet 8 is located at the lower part of the heat exchange tube 13, and the heat exchanger outlet 9 is located at the upper part of the heat exchange tube 13. The flat tube has a better heat exchange effect, and it is bent from bottom to top for multiple times to form a serpentine coil structure, which further improves the heat exchange effect. The heat exchanger inlet 8 is set at the lower part, and the heat exchanger outlet 9 is set at the upper part, which can ensure that the spray water flows and exchanges heat fully in the heat exchange tube 13.

[0031] In this embodiment, the air outlet of the heat exchanger 12 is provided with an upper air supply guide plate 15 and a lower air supply guide plate 16. The upper air supply guide plate 15 is composed of a first guide surface and a second guide surface. The first guide surface is a plane inclined from front to back, the front end of the first guide surface is inclined upward, and the rear end of the first guide surface is inclined downward and naturally transitioned to the second guide surface; the second guide surface is an arc surface with a middle part concave toward the top of the drying room body 4. The lower air supply guide plate 16 is used to guide the hot air from the lower part of the heat exchanger 12 to the upper part, and the upper air supply guide plate 15 is used to change the flow direction of the hot air and guide the hot air to the secondary fan 7. Through the inclined first guide surface and the arc-shaped second guide surface, the hot air can be naturally and smoothly guided to flow vertically downward, thereby ensuring that the gas flow in the drying room 2 is smoother and more reasonable.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A waste heat utilization drying room, characterized in that: It includes a drying room body, an air supply assembly for supplying air to the drying room body to dry the demoulded EPP molded parts, and a heat exchanger for heating the cold air introduced by the air supply assembly into hot air; the heat exchanger has a heat exchanger air inlet and a heat exchanger air outlet, the heat exchanger is installed on the side wall of the drying room body, and the air supply assembly is integrally arranged at the heat exchanger air inlet.

2. The waste heat utilization drying room according to claim 1 is characterized in that: The heat exchanger includes a heat exchange tube and a heat exchanger bracket. The heat exchange tube is installed on the upper part of the side wall of the drying room body through the heat exchanger bracket. The heat exchange tube has a heat exchanger inlet for heat exchange medium to flow in and a heat exchanger outlet for heat exchange medium to flow out. The heat exchanger inlet is located at the lower part of the heat exchanger, and the heat exchanger outlet is located at the upper part of the heat exchanger.

3. The waste heat utilization drying room according to claim 2 is characterized in that: The drying room body is provided with a rack for placing demoulding EPP molded parts, the rack is a grid structure, and a plurality of racks are arranged from top to bottom.

4. The waste heat utilization drying room according to claim 3 is characterized in that: The air supply assembly includes a first air supply fan and a second air supply fan. The first air supply fan and the second air supply fan are both arranged at the air inlet of the heat exchanger. The first air supply fan is located below the second air supply fan. The output power of the first air supply fan is greater than the output power of the second air supply fan.

5. The waste heat utilization drying room according to claim 4 is characterized in that: The heat exchanger air outlet is arranged on the top of the drying room body in a downward opening manner, and a secondary fan is installed at the heat exchanger air outlet.

6. The waste heat utilization drying room according to claim 5, characterized in that: The drying room is also provided with an induced draft fan, which is installed at the lower part of the drying room body and has an induced draft fan air inlet, which is arranged in the drying room body with an opening facing upward and is located at the bottom of the drying room body.

7. The waste heat utilization drying room according to claim 6, characterized in that: The heat exchanger comprises a heat exchange tube and a heat exchanger bracket. The heat exchange tube is a flat tube. The heat exchange tube is bent continuously from bottom to top for multiple times to form a serpentine coil structure.

8. The waste heat utilization drying room according to claim 7, characterized in that: The air inlet of the induced draft fan is provided with an induced draft guide plate, and the induced draft guide plate is an arc-shaped curved surface with the middle portion concave toward the bottom surface of the drying room body.

9. The waste heat utilization drying room according to claim 8, characterized in that: The air outlet of the heat exchanger is provided with an upper air supply guide plate and a lower air supply guide plate, and the upper air supply guide plate is composed of a first guide surface and a second guide surface, the first guide surface is a plane inclined from front to rear, the front end of the first guide surface is inclined upward, and the rear end of the first guide surface is inclined downward and naturally transitioned to the second guide surface; the second guide surface is an arc surface with the middle part concave toward the top of the drying room body.

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