A preheating device for treating polyester recycling by-products

Abstract

This utility model provides a preheating device for treating polyester recycling by-products, including a bag filter, a U-shaped air conveying pipe, and a preheating chamber. The air inlet of the bag filter is connected to a flue gas pipe, and the air outlet of the bag filter is connected to the preheating chamber through the U-shaped air conveying pipe. A ceramic membrane is installed inside the U-shaped air conveying pipe to remove moisture from the flue gas. The bag filter removes particulate matter from the flue gas, ensuring that the flue gas will not clog the pipe or damage the equipment during the preheating process. The ceramic membrane in the U-shaped air conveying pipe can remove moisture from the flue gas, preventing it from affecting temperature control and heat transfer during the preheating process. The pretreated flue gas enters the preheating chamber to effectively preheat the materials inside. This application has a simple structure, is easy to use, and greatly improves the preheating effect of by-product material treatment, making it suitable for large-scale promotion and use.

Description

Technical Field

[0001] This utility model relates to the field of polyester recycling equipment, and in particular to a preheating device for treating polyester recycling by-products. Background Technology

[0002] PET (Polyester Petroleum) is an important plastic widely used in textiles, packaging, and other fields. However, PET has a long natural degradation cycle, which easily causes environmental pollution. To address this issue, various methods for recycling PET polyester materials are currently available, such as chemical, biological, and physical methods. Among these, the most important chemical method is alcoholysis, which involves digesting recycled PET to obtain polyethylene terephthalate (PET), which can then be reused in the production of PET polyester. However, existing alcoholysis methods generate a certain amount of waste that cannot be recycled, commonly known as byproducts. Depending on the raw materials used in the alcoholysis method, these byproducts are classified as alcohol byproducts and ester byproducts. If these byproducts are not further treated, they will still cause environmental pollution.

[0003] The alcoholysis method for recovering PET polyester typically produces 10-20% by weight of byproducts. Therefore, the amount of byproducts generated during polyester recovery is enormous, and if left untreated, it will still cause pollution and waste of resources.

[0004] Thermolysis can effectively process polyester recycling byproducts and achieve resource recovery and reuse. However, the byproducts need to be preheated before pyrolysis in a continuous pyrolyzer. Chinese utility model patent CN205077007U discloses a raw material preheating and conveying device in a continuous pyrolysis process. This device recovers waste heat from flue gas and conveys it to a preheating chamber to preheat the materials. However, this device does not pre-treat the flue gas, which typically contains a large amount of particulate matter. These particles may originate from fuel ash and unburned carbon particles during combustion. Particulate matter easily contaminates the gas path and sensors of the preheating equipment, leading to instrument malfunctions. Furthermore, the moisture in the flue gas may exist in the form of water vapor or liquid. When the moisture is in the form of water vapor, the flue gas is diluted, causing the dilution ratio to fluctuate with the water vapor content, thus affecting temperature control and heat transfer during the preheating process, resulting in unsatisfactory preheating effects. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the aforementioned problems in the prior art, this utility model provides a preheating device for processing polyester recycling by-products.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] A preheating device for treating polyester recycling by-products includes a bag filter, a U-shaped air conveying pipe, and a preheating chamber.

[0010] The air inlet of the bag filter is connected to the flue gas duct, and the air outlet of the bag filter is connected to the preheating chamber through the U-shaped air conveying pipe. A ceramic membrane is installed inside the U-shaped air conveying pipe to remove moisture from the flue gas.

[0011] Preferably, the bag filter dust collection mechanism includes a filter tank, a dust hopper, a partition, a filter bag, and a beater assembly;

[0012] The ash hopper is installed at the bottom of the filter tank;

[0013] The partition is installed inside the filter vessel, and the partition divides the interior of the filter vessel into a filter chamber located in the upper part and a dust removal chamber located in the lower part;

[0014] The partition plate has multiple connecting holes arranged in a circular array with the center as the center point. A support frame is installed in the connecting holes, and a filter bag is fitted on the support frame. The support frame is located inside the dust removal chamber.

[0015] Preferably, the tapping assembly includes a drive gear, a drive ring, a tapping plate, and a motor;

[0016] The inner wall of the dust removal chamber is provided with an annular protrusion, and the drive ring is rotatably mounted on the annular protrusion.

[0017] The motor is connected to the drive gear, and the drive gear meshes with the drive ring;

[0018] Multiple striking plates are provided and are spaced at equal angles along the inner wall of the drive ring.

[0019] Preferably, the slapping plate is made of TPE, rubber or PU.

[0020] Preferably, the bag filter further includes a back-blowing component, which is installed inside the filter chamber and used to back-blow the filter bag.

[0021] Preferably, the backflushing assembly includes an air tank, an electromagnetic pulse valve, and a blowpipe. The air tank is sequentially connected to the electromagnetic pulse valve and the blowpipe. The blowpipe has multiple air outlets, and each blowpipe corresponds to a filter bag.

[0022] Preferably, it also includes a condensation mechanism, wherein the ceramic membrane is installed at the bend of the U-shaped gas pipe, and the condensation mechanism is disposed on the U-shaped gas pipe and corresponds to the installation position of the ceramic membrane.

[0023] Preferably, the U-shaped gas pipe is provided with a drain pipe, which is located on one side of the ceramic membrane and is used to discharge the condensed water. A control valve is installed on the drain pipe.

[0024] (III) Beneficial Effects

[0025] The beneficial effects of this utility model are as follows:

[0026] The bag filter removes particulate matter from the flue gas, ensuring that the flue gas does not clog pipes or damage equipment during the preheating process. The ceramic membrane in the U-shaped gas delivery pipe removes moisture from the flue gas, preventing it from affecting temperature control and heat transfer during the preheating process. The pretreated flue gas enters the preheating chamber to effectively preheat the materials inside. This application has a simple structure, is easy to use, and greatly improves the preheating effect of by-product materials, making it suitable for large-scale promotion and use. Attached Figure Description

[0027] Figure 1 A schematic diagram of a preheating device for processing polyester recycling by-products;

[0028] Figure 2 A schematic front view of a preheating device for processing polyester recycling by-products;

[0029] Figure 3 This is a schematic diagram of the internal structure of a bag filter dust collector.

[0030] Figure 4 This is a schematic diagram of the tapping component.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1. Baghouse dust collection system;

[0033] 11. Filter vessel; 12. Baffle plate; 13. Filter bag; 14. Backflushing assembly; 15. Ash hopper; 16. Beating assembly; 161. Beating plate; 162. Motor; 163. Drive ring; 164. Drive gear;

[0034] 2. U-shaped gas pipeline;

[0035] 3. Condensation mechanism;

[0036] 4. Preheating chamber. Detailed Implementation

[0037] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Please refer to Figures 1 to 4This utility model provides a preheating device for treating polyester recycling by-products, including a bag filter 1, a U-shaped air conveying pipe 2, and a preheating chamber 4.

[0039] The air inlet of the bag filter 1 is connected to the flue gas duct, and the air outlet of the bag filter 1 is connected to the preheating chamber 4 through the U-shaped air conveying pipe 2. A ceramic membrane is installed inside the U-shaped air conveying pipe 2 to remove moisture from the flue gas.

[0040] Preferably, the bag filter mechanism 1 includes a filter tank 11, a dust hopper 15, a partition 12, a filter bag 13, and a beater assembly 16;

[0041] The ash hopper 15 is installed at the bottom of the filter tank 11;

[0042] The partition 12 is installed inside the filter tank 11, and the partition 12 divides the interior of the filter tank 11 into a filter chamber located in the upper part and a dust removal chamber located in the lower part.

[0043] The partition plate 12 has multiple connecting holes arranged in a circular array with the center as the center point. A support frame is installed in the connecting holes, and a filter bag 13 is sleeved on the support frame and the support frame is located in the dust removal chamber.

[0044] In use, the bag filter 1 removes particulate matter from the flue gas, ensuring that the flue gas will not clog the pipes or damage the equipment during the preheating process. The ceramic membrane in the U-shaped gas conveying pipe 2 can remove moisture from the flue gas, preventing it from affecting the temperature control and heat transfer during the preheating process. The pretreated flue gas enters the preheating chamber 4 to effectively preheat the materials in the preheating chamber 4. This application has a simple structure and is easy to use, which greatly improves the preheating effect of by-product materials and is suitable for large-scale promotion and use.

[0045] In this embodiment, the tapping assembly 16 includes a drive gear 164, a drive ring 163, a tapping plate 161, and a motor 162;

[0046] The inner wall of the dust removal chamber is provided with an annular protrusion, and the drive ring 163 is rotatably mounted on the annular protrusion.

[0047] The motor 162 is connected to the drive gear 164, and the drive gear 164 meshes with the drive ring 163;

[0048] Multiple striking plates 161 are provided and are spaced at equal angles along the inner wall of the drive ring 163.

[0049] In use, the motor 162 drives the drive gear 164 and drive ring 163 to rotate in sequence, and the inner wall of the drive ring 163 beats the filter bag 13 to remove dust.

[0050] In this embodiment, the tapping plate 161 is made of TPE, rubber or PU. The tapping plate 161 made of flexible material has a long service life and can effectively tap the filter bag 13.

[0051] In this embodiment, the bag dust collector 1 further includes a back-blowing assembly 14, which is installed in the filter chamber and is used to back-blow the filter bag 13. The back-blowing assembly 14 includes an air tank, an electromagnetic pulse valve, and a blowpipe. The air tank is connected to the electromagnetic pulse valve and the blowpipe in sequence. The blowpipe is provided with multiple air outlets. The blowpipe corresponds one-to-one with the filter bag 13. The back-blowing assembly 14 back-blows the filter bag 13, and the dust on the surface of the filter bag 13 is blown into the dust hopper 15.

[0052] In this embodiment, a condensation mechanism 3 is also included. The ceramic membrane is installed at the bend of the U-shaped gas supply pipe 2. The condensation mechanism 3 is disposed on the U-shaped gas supply pipe 2 and corresponds to the installation position of the ceramic membrane. A drain pipe is provided on the U-shaped gas supply pipe 2. The drain pipe is disposed on one side of the ceramic membrane and is used to discharge the condensed water. A control valve is installed on the drain pipe. The condensation mechanism 3 is used to condense the separated water vapor to form liquid water, which is discharged through the drain pipe.

[0053] The working principle of this utility model is as follows:

[0054] The bag filter 1 removes particulate matter from the flue gas, ensuring that the flue gas does not clog pipes or damage equipment during the preheating process. The ceramic membrane in the U-shaped gas delivery pipe 2 removes moisture from the flue gas, preventing it from affecting temperature control and heat transfer during the preheating process. The pretreated flue gas enters the preheating chamber 4 to effectively preheat the materials inside. This application has a simple structure, is easy to use, and greatly improves the preheating effect of by-product materials, making it suitable for large-scale promotion and use.

[0055] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A preheating device for processing polyester recycling by-products, characterized in that, Includes a bag filter system, a U-shaped air delivery pipe, and a preheating chamber; The air inlet of the bag filter is connected to the flue gas duct, and the air outlet of the bag filter is connected to the preheating chamber through the U-shaped air conveying pipe. A ceramic membrane is installed inside the U-shaped air conveying pipe to remove moisture from the flue gas.

2. A preheating device for polyester recovery by-product treatment according to claim 1, characterized in that, The bag filter dust collection mechanism includes a filter tank, a dust hopper, a partition, a filter bag, and a beater assembly; The ash hopper is installed at the bottom of the filter tank; The partition is installed inside the filter vessel, and the partition divides the interior of the filter vessel into a filter chamber located in the upper part and a dust removal chamber located in the lower part; The partition plate has multiple connecting holes arranged in a circular array with the center as the center point. A support frame is installed in the connecting holes, and a filter bag is fitted on the support frame, which is located inside the dust removal chamber.

3. A preheating device for polyester recovery by-product treatment according to claim 2, characterized in that, The tapping assembly includes a drive gear, a drive ring, a tapping plate, and a motor; The inner wall of the dust removal chamber is provided with an annular protrusion, and the drive ring is rotatably mounted on the annular protrusion. The motor is connected to the drive gear, and the drive gear meshes with the drive ring; Multiple striking plates are provided and are spaced at equal angles along the inner wall of the drive ring.

4. A preheating device for polyester recovery by-product treatment according to claim 3, characterized in that, The slapping plate is made of TPE, rubber or PU.

5. A preheating device for polyester recovery by-product treatment according to claim 2, characterized in that, The bag filter dust collector also includes a back-blowing component, which is installed inside the filter chamber and is used to back-blow the filter bag.

6. The preheating device for treating polyester recycling by-products according to claim 5, characterized in that, The backflush assembly includes an air tank, an electromagnetic pulse valve, and a blowpipe. The air tank is connected to the electromagnetic pulse valve and the blowpipe in sequence. The blowpipe has multiple air outlets, and each blowpipe corresponds to a filter bag.

7. A preheating device for polyester recovery by-product treatment according to claim 1, characterized in that, It also includes a condensation mechanism, wherein the ceramic membrane is installed at the bend of the U-shaped gas pipe, and the condensation mechanism is disposed on the U-shaped gas pipe and corresponds to the installation position of the ceramic membrane.

8. A preheating device for polyester recovery by-product treatment according to claim 7, characterized in that, A drain pipe is provided on the U-shaped gas transmission pipe. The drain pipe is located on one side of the ceramic membrane and is used to discharge the condensed water. A control valve is installed on the drain pipe.

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