Hard PVC foamed board waste gas recycling device

Abstract

This utility model discloses a waste gas recycling device for rigid PVC foam boards. This device aims to solve the technical problem that existing technologies cannot directly recover hot airflow or utilize hot airflow to heat the medium according to needs, thus failing to meet the requirements of different scenarios. It includes a lower chamber and an upper chamber. An activated carbon filter layer is detachably connected inside the upper chamber. The lower chamber has multiple layers of heat-conducting pipes arranged in its inner cavity, with the ends of these pipes interconnected. The other ends of the uppermost and lowermost heat-conducting pipes respectively penetrate the lower chamber. A waste gas inlet assembly is installed on the top surface of the upper chamber. This utility model allows for the selection of directly recovering hot airflow or utilizing hot airflow to heat the medium according to needs, offering high flexibility in use.

Description

Technical Field

[0001] This utility model belongs to the field of PVC foam board processing technology, specifically relating to a rigid PVC foam board waste gas recycling device. Background Technology

[0002] The core of waste gas heat recovery during PVC foam board extrusion is to efficiently recover the heat energy contained in the waste gas while treating it, achieving the dual benefits of energy saving and environmental protection. PVC extrusion waste gas may contain small amounts of dust and volatile substances (such as vinyl chloride monomer), requiring pretreatment such as filtration and dust removal. Activated carbon filtration is a common treatment method.

[0003] Existing waste gas heat recovery and utilization devices have poor flexibility in use, and can often only perform single heat energy recovery, such as heat exchangers or heat pump technology. Users cannot choose to directly recover hot gas flow or use hot gas flow to heat the medium according to their needs, which is not convenient to meet the needs of different scenarios.

[0004] Therefore, a rigid PVC foam board exhaust gas recycling device was designed to overcome the above-mentioned technical defects. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a waste gas recycling device for rigid PVC foam boards. This recycling device aims to solve the technical problem that existing technologies cannot directly recover hot airflow or use hot airflow to heat the medium according to needs, which is not convenient to meet the needs of different scenarios.

[0007] (2) Technical solution

[0008] To solve the above-mentioned technical problems, this utility model provides a rigid PVC foam board exhaust gas recycling device, including a lower box and an upper box. The upper box has an activated carbon filter layer detachably connected inside. The lower box has multiple heat conduction pipes installed in its inner cavity, and the multiple heat conduction pipes are interconnected end to end. The other ends of the uppermost heat conduction pipe and the lowermost heat conduction pipe respectively penetrate the lower box. An exhaust gas introduction component is installed on the top surface of the upper box.

[0009] Furthermore, a water injection pipe and a drain pipe are fixedly connected to the left side wall of the lower housing from top to bottom, and a first control valve is installed on the side wall of the water injection pipe and the drain pipe respectively.

[0010] Furthermore, a valve is installed on the bottom heat pipe end face located on the outside of the lower casing.

[0011] Furthermore, an exhaust pipe is fixedly connected to the right side wall of the lower housing near the upper side, and a second control valve is installed on the side wall of the exhaust pipe.

[0012] Furthermore, the exhaust gas introduction assembly includes a fan fixedly installed on the top surface of the upper housing, an air inlet pipe fixedly connected to the output end of the fan, the other end of the air inlet pipe penetrating the upper housing and extending to the upper side of the activated carbon filter layer, a diversion pipe fixedly connected to the input end of the fan, and several connecting pipes fixedly connected to the side wall of the diversion pipe.

[0013] Furthermore, corrugated pipes are fixedly connected to the end faces of the connecting pipes.

[0014] Furthermore, the lower and upper boxes are connected by bolts, and the lower and upper boxes are interconnected.

[0015] Furthermore, the heat pipe is made of copper or aluminum.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention, through the design of a lower housing, an upper housing, a heat-conducting pipe, and an exhaust gas introduction component, allows users to choose to directly recover hot airflow or use hot airflow to heat a medium (e.g., water) according to their needs. It offers high flexibility in use. Furthermore, during the PVC foam board extrusion molding process, corrugated pipes can be laid around the PVC foam board to both recover and treat harmful exhaust gases generated by the PVC foam board and increase the airflow around the PVC foam board, thereby improving the molding effect. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is a schematic cross-sectional view of the left oblique angle of this utility model;

[0021] Figure 3 This is a schematic cross-sectional view of the present invention from a right oblique perspective;

[0022] Figure 4 This is a front view of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the heat pipe of this utility model;

[0024] Figure 6 This is a front view of the heat pipe of this utility model;

[0025] Figure 7 This is a schematic diagram of the structure of the exhaust gas introduction component of this utility model.

[0026] The markings in the attached diagram are as follows: 1. Lower housing; 2. Upper housing; 3. Activated carbon filter layer; 4. Heat pipe; 5. Valve; 6. Water injection pipe; 7. Drain pipe; 8. Fan; 9. Air inlet pipe; 10. Diverter pipe; 11. Connecting pipe; 12. Corrugated pipe; 13. Exhaust pipe. Detailed Implementation Example 1

[0027] This specific embodiment is a rigid PVC foam board exhaust gas recycling device, the structural schematic diagram of which is shown below. Figures 1-7 As shown, the structure includes a lower chamber 1 and an upper chamber 2, which are connected by bolts and are interconnected. Specifically, both the lower chamber 1 and the upper chamber 2 have lugs extending from their end faces, and these lugs are connected by bolts. When the activated carbon filter layer 3 needs to be cleaned or replaced, the upper chamber 2 can be removed simply by unscrewing the bolts. The structure is simple, easy to operate, and has a high sealing performance. The activated carbon filter layer 3 is detachably connected inside the upper chamber 2. The lower chamber 1 has multiple layers of heat-conducting pipes 4 installed inside, and these pipes are interconnected. The other ends of the uppermost and lowermost heat-conducting pipes 4 respectively penetrate the lower chamber 1. An exhaust gas inlet assembly is installed on the top surface of the upper chamber 2. A valve 5 is installed on the outer side of the lower chamber 1 at the end face of the lowermost heat-conducting pipe 4. The valve 5 can be used to control the outflow rate of water.

[0028] like Figure 1 and Figure 7 As shown, the exhaust gas inlet assembly includes a fan 8 fixedly installed on the top surface of the upper housing 2. An inlet pipe 9 is fixedly connected to the output end of the fan 8. The other end of the inlet pipe 9 passes through the upper housing 2 and extends to the upper side of the activated carbon filter layer 3. A diversion pipe 10 is fixedly connected to the input end of the fan 8. Several connecting pipes 11 are fixedly connected to the side wall of the diversion pipe 10. Corrugated pipes 12 are fixedly connected to the end faces of each connecting pipe 11. The corrugated pipes 12 are preferably aluminum foil pipes, which have good ductility and high-temperature resistance.

[0029] The waste gas and hot air generated during the extrusion molding process of PVC foam board usually have a high temperature (up to 60℃~120℃). After being introduced into the lower box 1 through the corrugated pipe 12, the heat is recovered. The recovered heat energy can be used to preheat raw materials, heat the production workshop or assist other heat-requiring processes, reducing the consumption of additional energy and lowering production energy costs.

[0030] Furthermore, if high-temperature exhaust gases diffuse directly within the workshop, it will cause the workshop temperature to rise, affecting the comfort of operators and the stability of equipment operation. Collecting the exhaust gases centrally through the corrugated pipe 12 can maintain a constant workshop temperature, improve the working environment, and extend the service life of the equipment.

[0031] The heat pipe 4 is made of either copper or aluminum. Copper is one of the best thermally conductive materials among common metals. This allows it to quickly absorb and conduct heat, reducing energy loss during heat conduction, making it suitable for scenarios requiring efficient heat dissipation or rapid heat conduction, such as heat sinks and heat exchangers. Aluminum, on the other hand, excels in lightweight applications. Its thermal conductivity is sufficient for most everyday or industrial needs (such as computer CPU coolers and automotive engine heat sinks), and it is also more cost-effective. Example 2

[0032] Based on Example 1, this example specifically illustrates another form of heat energy recovery:

[0033] like Figure 2 and Figure 4 As shown, a water injection pipe 6 and a drain pipe 7 are fixedly connected from top to bottom on the left side wall of the lower housing 1. A first control valve is installed on the side wall of the water injection pipe 6 and the drain pipe 7 respectively.

[0034] By introducing hot airflow into the lower chamber 1 through the corrugated pipe 12 to heat water, the heat in the exhaust gas can be transferred to the water, raising the water temperature (e.g., from room temperature to 40℃~80℃) for use in production processes (e.g., equipment cooling circulating water, workshop cleaning water, subsequent process water, etc.), reducing the need for additional heating energy (e.g., electricity, steam). Example 3

[0035] Based on Example 1, this example specifically illustrates another form of heat energy recovery:

[0036] like Figure 3 and Figure 4 As shown, an exhaust pipe 13 is fixedly connected to the right side wall of the lower housing 1 near the upper side, and a second control valve is installed on the side wall of the exhaust pipe 13.

[0037] By recovering and reusing hot airflow, this waste heat can be used to dry materials or preheat raw materials, which can reduce the operating time of electric heating or steam heating equipment, reduce equipment energy consumption and maintenance costs; moreover, this type of waste heat recovery can reduce the energy consumption of the production line by 10%-15%, especially in continuous production scenarios, with significant long-term energy-saving effects.

[0038] Working principle: First, the corrugated pipe 12 is extended to the PVC foam board extrusion molding position, and the hot air exhaust generated in the PVC foam board extrusion molding area is introduced into the upper box 2 by the blower 8. When there is a lot of hot air exhaust in the upper box 2, the air pressure is used to make the exhaust pass through the activated carbon filter layer 3 to adsorb harmful gases or substances in the exhaust.

[0039] Next, based on the heat recovery requirements, you can choose to directly recover the hot airflow or use the hot airflow to heat the medium;

[0040] When the user needs to directly recover the hot airflow, the hot airflow can pass through the activated carbon filter layer 3 and be collected inside the lower chamber 1. The temperature of the hot airflow is used to heat the heat pipe 4 to maintain the temperature inside the lower chamber 1. When the hot airflow needs to be extracted for recycling, it can be discharged directly from the exhaust pipe 13.

[0041] When a user needs to heat water using hot airflow, the uppermost heat pipe 4 can be connected to an external water pipe, and water flow can be injected into the heat pipe 4. The water flow is buffered within the heat pipe 4. At this time, the hot airflow in the lower chamber 1 can exchange heat with the heat pipe 4 and the water flow inside it to heat the water.

[0042] In addition, water of appropriate level can be injected directly into the lower tank 1 through the water injection pipe 6. The water can be heated by the hot air flow or by the heat conduction through the heat pipe 4.

[0043] All technical features in this embodiment can be freely combined according to actual needs.

[0044] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A rigid PVC foam board exhaust gas recycling device, comprising a lower chamber (1) and an upper chamber (2), characterized in that: The upper box (2) is detachably connected to an activated carbon filter layer (3). The lower box (1) is provided with multiple layers of heat-conducting pipes (4), and the multiple layers of heat-conducting pipes (4) are interconnected. The other ends of the uppermost heat-conducting pipe (4) and the lowermost heat-conducting pipe (4) respectively penetrate the lower box (1). The top surface of the upper box (2) is provided with an exhaust gas introduction component.

2. The rigid PVC foam board waste gas recycling device according to claim 1, characterized in that: The lower housing (1) has a water injection pipe (6) and a drain pipe (7) fixedly connected from top to bottom on the left side wall. The water injection pipe (6) and the drain pipe (7) are respectively equipped with a first control valve on their side walls.

3. The rigid PVC foam board waste gas recycling device according to claim 1, characterized in that: A valve (5) is installed on the end face of the heat pipe (4) located outside the lower box (1).

4. The rigid PVC foam board waste gas recycling device according to claim 1, characterized in that: An exhaust pipe (13) is fixedly connected to the right side wall of the lower housing (1) near the upper side, and a second control valve is installed on the side wall of the exhaust pipe (13).

5. The rigid PVC foam board waste gas recycling device according to claim 1, characterized in that: The exhaust gas inlet assembly includes a fan (8) fixedly installed on the top surface of the upper housing (2). The output end of the fan (8) is fixedly connected to an air inlet pipe (9). The other end of the air inlet pipe (9) passes through the upper housing (2) and extends to the upper side of the activated carbon filter layer (3). The input end of the fan (8) is fixedly connected to a diversion pipe (10). Several connecting pipes (11) are fixedly connected to the side wall of the diversion pipe (10).

6. The rigid PVC foam board waste gas recycling device according to claim 5, characterized in that: The end face of each connecting pipe (11) is fixedly connected with a bellows (12).

7. The rigid PVC foam board waste gas recycling device according to claim 1, characterized in that: The lower box (1) and the upper box (2) are connected by bolts, and the lower box (1) and the upper box (2) are interconnected.

8. The rigid PVC foam board waste gas recycling device according to claim 1, characterized in that: The heat pipe (4) is made of copper or aluminum.

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