A heat waste recovery teflon flow guide pipe

Abstract

This utility model discloses a Teflon-coated guide pipe for recovering hot waste gas, comprising a guide pipe for guiding hot waste gas, a filter chamber for treating waste gas in the middle of the guide pipe, a filter plate for filtering waste gas installed inside the filter chamber, and a cleaning assembly for quickly cleaning the filter plate installed inside the filter chamber. The cleaning assembly includes a delivery pipe installed inside the filter chamber for conveying airflow, several sets of nozzles for spraying airflow onto the surface of the filter plate installed at the output end of the delivery pipe, and a pulse valve for generating high-frequency pulsed airflow installed at the input end of the delivery pipe at the upper part of the filter chamber. A compressor for providing power to the pulse valve is installed at the input end of the pulse valve. The cleaning assembly works together to clean the filter plate, preventing filter plate blockage. This ensures the continuous operation of the guide pipe and improves the practicality and maintenance convenience of the system.

Description

Technical Field

[0001] This utility model relates to the field of flow guide pipe technology, specifically a Teflon flow guide pipe for recovering hot waste gas. Background Technology

[0002] In industrial production, waste gases generated by industries such as metallurgy, building materials, coal-fired power plants, chemicals, ore processing, and waste incineration typically contain large amounts of dust. This dust mainly consists of complex components such as metal particles, inorganic salts, and incompletely burned carbon particles. The dust in these high-temperature waste gases is characterized by high concentration and wide particle size distribution, which significantly affects heat recovery efficiency and exacerbates equipment wear. Without effective treatment, it can also cause air pollution and harm human health.

[0003] In heat recovery systems, the impact of dust is particularly prominent. Dust deposits on heat exchange surfaces, forming an insulating layer that increases thermal resistance and reduces heat transfer efficiency. Accumulated dust also narrows flow channels, increases airflow resistance, and leads to increased energy consumption. Meanwhile, high-hardness particles can wear down pipes and equipment, while corrosive dust may accelerate chemical corrosion and shorten equipment lifespan. In addition, fine particulate matter tends to accumulate in narrow areas, causing blockages and increasing maintenance frequency and costs.

[0004] According to the authorization announcement number CN 213478827 U, a flow guide pipe with high efficiency and safety protection performance is disclosed, including a flow guide pipe, the interior of which is lined with a sound-absorbing layer, a damping movable rod is horizontally installed in the inner cavity of the flow guide pipe, and the outer surface of the damping movable rod is equipped with no less than five sets of functional screw-fit mounting seats perpendicular to the outer surface of the shaft. A magnetic filter plate is snapped onto the outside of the functional screw-fit mounting seats. The cavity wall of the flow guide pipe is composed of a double-layer steel structure plate sandwiched with an expandable melamine resin foam insulation material and anti-corrosion paint, and the outer surface of the cavity wall of the flow guide pipe is also provided with shaped reinforcing ribs.

[0005] Existing flow diversion pipes can only filter dust in exhaust gas during use, but they cannot quickly clean the filter elements, which requires the filter elements to be disassembled and cleaned from time to time, reducing the practicality of the flow diversion pipes. Therefore, there is a need for a Teflon flow diversion pipe for hot exhaust gas recovery. Utility Model Content

[0006] The purpose of this utility model is to provide a Teflon guide pipe for recovering hot waste gas, which cleans the filter element through a set cleaning component, eliminating the need to disassemble the filter element for cleaning, thereby solving the technical problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A Teflon guide pipe for recovering hot waste gas includes a guide pipe for guiding hot waste gas, a filter chamber for treating waste gas is provided in the middle of the guide pipe, a filter plate for filtering waste gas is installed inside the filter chamber, and a cleaning component for quickly cleaning the filter plate is installed inside the filter chamber.

[0009] The cleaning assembly includes a delivery pipe installed inside the filter chamber for delivering airflow. The output end of the delivery pipe is equipped with several sets of nozzles for spraying airflow onto the surface of the filter plate. The input end of the delivery pipe is located at the upper part of the filter chamber and is equipped with a pulse valve for generating high-frequency pulsed airflow. The input end of the pulse valve is equipped with a compressor for providing power to the pulse valve.

[0010] Preferably, a fixing frame for fixing the filter plate is installed on the outside of the filter plate, and the fixing frame is embedded in the inner wall of the filter cavity.

[0011] Preferably, a support frame for supporting the pulse valve and the compressor is installed on the upper part of the filter chamber, and a flange ring for fixing the pulse valve is installed through the middle of the support frame. The flange ring is connected to the pulse valve by a number of bolts.

[0012] Preferably, the outer arc surface of the filter chamber is provided with a discharge port for discharging dust, and a support block for supporting the filter chamber is installed at the bottom of the filter chamber. A collection box for collecting the dust discharged from the discharge port is installed inside the support block.

[0013] Preferably, a water tank is installed on the side of the guide pipe, and a heat exchange tube for exchanging heat with the exhaust gas is installed through the side wall of the guide pipe at the output end of the water tank. The output end of the heat exchange tube is connected to the input end of the water tank.

[0014] Preferably, the outer arc surface of the heat exchange tube is equipped with several sets of fins to increase the heat exchange effect, and all sets of fins are arranged inside the flow guide pipe.

[0015] Preferably, a sealing block for sealing the gap is installed at the connection between the heat exchange tube and the flow guide pipe, and the cross-sectional shape of the sealing block matches the gap at the connection.

[0016] Preferably, the inner wall of the diversion pipe is entirely covered with an anti-corrosion layer, which is made of Teflon material.

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

[0018] When cleaning of the filter plates inside the flow channel is required, the cleaning assembly is activated. The compressor compresses outside air and delivers it to the pulse valve. The high-frequency pulsed airflow generated by the pulse valve is then transported through the delivery pipe and finally sprayed onto the filter plate surface through the nozzle, thus cleaning the dust adhering to the filter element surface. The working interaction of the cleaning components effectively removes dust from the filter plate surface, preventing clogging. The entire process does not require disassembling the filter plates, ensuring continuous operation of the flow channel and improving the system's practicality and ease of maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the filter chamber of this utility model;

[0021] Figure 3 This is a schematic diagram of the installation structure of the collection box of this utility model;

[0022] Figure 4 This is a schematic diagram of the heat exchanger tube installation structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the anti-corrosion layer structure of this utility model.

[0024] In the diagram: 1. Guide pipe; 2. Filter chamber; 3. Fixing frame; 4. Filter plate; 5. Support frame; 6. Cleaning assembly; 61. Delivery pipe; 62. Nozzle; 63. Pulse valve; 64. Compressor; 7. Flange ring; 8. Discharge port; 9. Support block; 10. Collection box; 11. Water tank; 12. Heat exchange tube; 13. Fin; 14. Sealing block; 15. Anti-corrosion layer. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides: a Teflon-coated guide pipe for recovering hot waste gas, such as... Figures 1-5As shown, the system includes a guide pipe 1 for guiding hot exhaust gas. A filter chamber 2 for treating the exhaust gas is located in the middle of the guide pipe 1. A filter plate 4 for filtering the exhaust gas is installed inside the filter chamber 2. A cleaning component 6 for quickly cleaning the filter plate 4 is also installed inside the filter chamber 2. The filter plate 4, located in the middle of the guide pipe 1, effectively traps particulate matter, suspended solids, oil mist, and other impurities in the exhaust gas. The filter plate 4 can separate metal dust, soot, etc., from the exhaust gas, making the purified exhaust gas more compliant with subsequent heat recovery or emission standards. The cleaning component 6 can directly and quickly remove accumulated dust and impurities from the surface of the filter plate 4 inside the filter chamber 2, eliminating the need for frequent manual disassembly of the filter chamber 2 or filter plate 4, reducing downtime for maintenance, and improving the continuous operation efficiency of the system. The automated design of the cleaning component 6 avoids direct contact between operators and pollutants, making it suitable for exhaust gas treatment scenarios in hazardous environments.

[0027] The cleaning component 6 includes a delivery pipe 61 installed inside the filter chamber 2 for conveying airflow. Several sets of nozzles 62 are installed at the output end of the delivery pipe 61 for spraying airflow onto the surface of the filter plate 4. A pulse valve 63 for generating high-frequency pulsed airflow is installed at the upper part of the filter chamber 2 at the input end of the delivery pipe 61. A compressor 64 for providing power to the pulse valve 63 is installed at the input end of the pulse valve 63. When the filter plate 4 needs to be cleaned, the compressor 64 runs and delivers airflow to the air storage end pulse valve 63. After receiving the signal, the pulse valve 63 opens, allowing compressed air to enter the valve body through its input end, forming a high-frequency pulsed airflow. The high-frequency pulsed airflow enters the delivery pipe 61 at the upper part of the filter chamber 2 from the output end of the pulse valve 63. The pulsed airflow is further accelerated when it passes through the nozzles 62, forming a high-speed airflow jet, which is sprayed onto the surface and pores of the filter plate 4 with a strong impact force, stripping off the attached dust, particles and other impurities. The filter plate 4 is cleaned by air jet, eliminating the need for direct manual contact with the filter plate 4. This reduces the risk of operators coming into contact with harmful substances in the exhaust gas, making it particularly suitable for exhaust gas treatment scenarios containing corrosive, toxic, and harmful impurities, thus ensuring the safety and health of the staff.

[0028] The pulse valve 63 adopts the ASCO551 series, which is designed for high-frequency pulsed airflow. It features fast response, high durability, and stable performance, making it suitable for industrial waste gas treatment scenarios. Its high-temperature resistance and corrosion resistance match the corrosion protection requirements of Teflon guide pipes, effectively supporting the efficient operation of cleaning component 6.

[0029] Compressor 64 uses an AtlasCopco GA11-15VSD variable frequency air compressor. This model is energy-efficient and supports variable frequency control, dynamically adjusting the output pressure according to the needs of pulse valve 63 to ensure stable airflow. Its low noise and compact design make it suitable for integration into duct systems, and its low maintenance costs make it suitable for long-term operation.

[0030] Preferably, a fixing frame 3 for fixing the filter plate 4 is installed on the outside of the filter plate 4. The fixing frame 3 is embedded in the inner wall of the filter chamber 2. The fixing frame 3 is made of metal and provides a rigid support frame for the filter plate 4, so as to avoid the filter plate 4 from bending, collapsing or other deformation problems under high-speed airflow impact or long-term load. The embedded cooperation between the fixing frame 3 and the inner wall of the filter chamber 2 can ensure that the filter plate 4 is accurately installed in the predetermined position, and avoid the exhaust gas from passing directly through the gap without filtration due to installation deviation, so as to ensure the reliability of the filtration effect.

[0031] Filter plate 4 uses a Donaldson Torit HEPA high-efficiency filter plate. This filter plate has a high interception efficiency for particulate matter (such as metal dust and soot) in high-temperature exhaust gas, and the material is resistant to high temperature and chemical corrosion, and is compatible with the anti-corrosion layer of Teflon guide pipes. Its structural strength is suitable for fixing with a fixed frame and is not easily deformed.

[0032] Furthermore, a support frame 5 for supporting the pulse valve 63 and compressor 64 is installed on the upper part of the filter chamber 2. A flange ring 7 for fixing the pulse valve 63 is installed through the middle of the support frame 5. The flange ring 7 is connected to the pulse valve 63 by several sets of bolts. The top plane can simultaneously bear the weight of the pulse valve 63 and compressor 64, and the bottom is connected to the top of the filter chamber 2, so as to evenly distribute the equipment load to the cavity structure and avoid local stress concentration that could cause deformation of the filter chamber 2. After fixing the flange of the pulse valve 63 to the flange ring 7 with bolts, it can be ensured that the central axis of the valve body is strictly aligned with the input end of the delivery pipe 61, avoiding increased airflow resistance or pulse energy loss due to installation misalignment.

[0033] Flange ring 7 is an ANSI B16.5 Class 150 stainless steel flange. The standard ANSI flange ensures the sealing and compatibility of the connection with the pulse valve. The stainless steel material is corrosion resistant and suitable for high-pressure gas flow environments. The bolt fixing method facilitates maintenance and replacement.

[0034] Furthermore, the outer arc surface of the filter chamber 2 is provided with a discharge port 8 for discharging dust. A support block 9 is installed at the bottom of the filter chamber 2 to support the filter chamber 2. A collection box 10 for collecting the dust discharged from the discharge port 8 is installed inside the support block 9. The discharge port 8 is located in the lower middle part of the outer arc surface of the filter chamber 2. After the filter plate 4 is cleaned by the cleaning component 6, the dust gathers towards the cavity wall under the action of centrifugal force and can slide directly down the arc surface to the discharge port 8. The hollow interior of the support block 9 forms the installation cavity of the collection box 1. The collection box 1 adopts a drawer-type or push-pull-type structure, which can quickly store the collected dust in a suitable place.

[0035] It is worth noting that a water tank 11 is installed on the side of the guide pipe 1. A heat exchange tube 12 for exchanging heat with the exhaust gas is installed through the side wall of the guide pipe 1 at the output end of the water tank 11. The output end of the heat exchange tube 12 is connected to the input end of the water tank 11. The heat exchange tube 12 penetrates the side wall of the guide pipe 1 and is in direct contact with the hot exhaust gas, resulting in a large heat exchange area and high efficiency. The heat in the exhaust gas can be quickly transferred to the circulating water in the heat exchange tube 12, achieving effective recovery of waste heat from the exhaust gas. The output end of the heat exchange tube 12 is connected to the input end of the water tank 11, forming a closed water circulation system. Water continuously circulates between the water tank 11 and the heat exchange tube 12, continuously absorbing heat from the exhaust gas without the need for frequent water replenishment or medium replacement, reducing water waste and meeting environmental protection and energy-saving requirements.

[0036] Heat exchanger tube 12 uses Alfa Laval CB26 brazed heat exchanger tubes. The CB26 series is made of stainless steel, which is resistant to high temperature and corrosion. The fin design enhances heat exchange efficiency and is suitable for waste heat recovery from exhaust gas. Its compact structure fits the internal space of the guide pipe, has good sealing performance, and can reduce heat loss.

[0037] Preferably, the outer arc surface of the heat exchange tube 12 is equipped with several sets of fins 13 to increase the heat exchange effect. The fins 13 are all arranged inside the flow guide pipe 1. By increasing the outer surface area of ​​the heat exchange tube 12, the fins 13 significantly increase the contact area between the exhaust gas and the heat exchange tube 12, and the heat transferred per unit time increases significantly. The fins 13 will interfere with the flow state of the exhaust gas in the flow guide pipe 1, causing the exhaust gas to form turbulence in the gap between the fins, breaking the boundary layer thermal resistance, and reducing the dead zone of heat transfer.

[0038] Specifically, a sealing block 14 for sealing the gap is installed at the connection between the heat exchange tube 12 and the flow guide pipe 1. The cross-sectional shape of the sealing block 14 matches the gap at the connection. The cross-section of the sealing block and the shape of the gap at the connection are perfectly matched, avoiding the leakage problem caused by shape mismatch in traditional sealing methods. In the scenario of high pressure flow of exhaust gas, the tightly fitting sealing structure can withstand higher fluid pressure and prevent gas from overflowing from the connection.

[0039] More specifically, the inner wall of the diversion pipe 1 is entirely covered with an anti-corrosion layer 15, which is made of Teflon. Teflon hardly reacts with any chemical substances and can withstand the scouring of strong corrosive media such as sulfuric acid, hydrochloric acid, nitric acid, and sodium hydroxide for a long time. It is especially suitable for treating highly corrosive industrial waste gases such as chemical waste gas and pickling tail gas. Teflon has an extremely low coefficient of friction, making it difficult for dust, oil, and sticky particles in the waste gas to adhere to the inner wall of the pipe, significantly reducing the risk of dust accumulation and scaling and reducing the frequency of manual cleaning.

[0040] The anti-corrosion layer 15 is a DuPont Teflon PTFE coating. DuPont Teflon PTFE coating has excellent chemical inertness and a low coefficient of friction, effectively resisting corrosive substances in exhaust gases and extending pipeline life. Its application process is mature and can completely cover the inner wall of the pipeline, preventing localized damage.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat waste recovery Teflon draft tube, characterized in that: It includes a flow guide pipe (1) for guiding hot exhaust gas, and a filter chamber (2) for treating exhaust gas is provided in the middle of the flow guide pipe (1). A filter plate (4) for filtering exhaust gas is installed inside the filter chamber (2), and a cleaning component (6) for quickly cleaning the filter plate (4) is installed inside the filter chamber (2). The cleaning assembly (6) includes a delivery pipe (61) installed inside the filter chamber (2) for delivering airflow. The output end of the delivery pipe (61) is equipped with several sets of nozzles (62) for spraying airflow onto the surface of the filter plate (4). The input end of the delivery pipe (61) is located at the upper part of the filter chamber (2) and is equipped with a pulse valve (63) for generating high-frequency pulsed airflow. The input end of the pulse valve (63) is equipped with a compressor (64) for providing power to the pulse valve (63).

2. A Teflon draft tube for recovering heat from exhaust gases according to claim 1, characterized in that: The filter plate (4) is externally mounted with a fixing frame (3) for fixing the filter plate (4), and the fixing frame (3) is embedded in the inner wall of the filter cavity (2).

3. A Teflon draft tube for recovering heat from exhaust gases according to claim 2, characterized in that: The upper part of the filter chamber (2) is equipped with a support frame (5) for supporting the pulse valve (63) and the compressor (64). A flange ring (7) for fixing the pulse valve (63) is installed through the middle of the support frame (5). The flange ring (7) is connected to the pulse valve (63) by several sets of bolts.

4. A Teflon draft tube for recovering heat from exhaust gases according to claim 3, characterized in that: The outer arc surface of the filter chamber (2) is provided with a discharge port (8) for discharging dust. A support block (9) for supporting the filter chamber (2) is installed at the bottom of the filter chamber (2). A collection box (10) for collecting the dust discharged from the discharge port (8) is installed inside the support block (9).

5. A Teflon draft tube for recovering heat from exhaust gases according to claim 1, characterized in that: A water tank (11) is installed on the side of the flow guide pipe (1). A heat exchange tube (12) for exchanging heat with the exhaust gas is installed through the side wall of the flow guide pipe (1) at the output end of the water tank (11). The output end of the heat exchange tube (12) is connected to the input end of the water tank (11).

6. A Teflon draft tube for recovering heat from exhaust gases according to claim 5, characterized in that: The outer arc surface of the heat exchange tube (12) is equipped with several sets of fins (13) for increasing the heat exchange effect, and the several sets of fins (13) are all arranged inside the flow guide pipe (1).

7. A Teflon draft tube for recovering heat from exhaust gases according to claim 6, characterized in that: A sealing block (14) for sealing the gap is installed at the connection between the heat exchange tube (12) and the flow guide pipe (1), and the cross-sectional shape of the sealing block (14) matches the gap at the connection.

8. A Teflon draft tube for recovering heat from exhaust gases according to claim 1, characterized in that: The inner wall of the flow guide pipe (1) is entirely covered with an anti-corrosion layer (15), which is made of Teflon material.

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