A fresh air preheater

Abstract

The utility model discloses a kind of fresh air preheaters, it is characterized in that, including body, the body is vertically arranged;The body is provided with first cavity, several pipe bodies are equipped in the first cavity, the pipe body is hot smoke part inside, the pipe body is fresh air part outside, hot smoke flows from lower to upper in the hot smoke part;First stop piece is connected with interval on the inner wall of the first cavity, fresh air is serpentine flow in the fresh air part;Second cavity is equipped in the body upper portion, the pipe body is connected with the second cavity, hot water blowing device is equipped in the second cavity.One kind of fresh air preheater is vertically arranged, is provided with hot water blowing device, pipe wall adhering object can be dissolved and separated from pipe wall under the action of hot water washing under high temperature.New air preheater is passed into fresh air outside pipe body, can recover the heat in the hot smoke after the shaping machine shaping.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermal interaction equipment and relates to a fresh air preheater. Background Technology

[0002] In addition to oil (fumes) and other volatile organic compounds, the exhaust gas emitted by stenters contains a large amount of waste heat. Only 29% of the heat energy is consumed during fabric processing and stenting, and about 10% is lost through the machine itself. The remaining large amount of heat energy is dissipated into the atmosphere with the exhaust gas. This waste gas not only seriously affects people's physical and mental health and pollutes the environment, but also causes significant energy waste, increases enterprise costs, reduces enterprise competitiveness, and in severe cases, threatens the survival of the enterprise. Therefore, waste heat recovery from stenters is a key aspect of energy conservation and efficiency improvement in factories.

[0003] In existing technologies, conventional heat exchangers use tubular heat exchangers. Traditional tubular heat exchangers are arranged horizontally in a square pattern. Because the stenter's operation requires the discharge of high-temperature exhaust gas containing a large amount of fiber dust and wax oil, and oily dust has strong adhesive properties, it easily adheres to the heat exchanger tube walls. This oily dust buildup on the tube walls severely reduces heat exchanger efficiency, resulting in energy waste and poor heat exchange performance. Therefore, a fresh air preheater is needed to recover heat energy from the exhaust air and solve the problem of easy clogging in traditional tubular heat exchangers. Utility Model Content

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A fresh air preheater includes a body, which is vertically arranged; The main body is provided with a first cavity, and a plurality of tubes are provided inside the first cavity. The tubes are for hot smoke and the tubes are for fresh air. The hot smoke flows from bottom to top in the hot smoke section. First baffles are connected at intervals on the inner wall of the first cavity, and the fresh air flows in a serpentine manner in the fresh air section. The upper part of the main body is provided with a second cavity, the tube is connected to the second cavity, and the top of the second cavity is provided with a hot water purging device.

[0005] As a further embodiment of this utility model: the hot water purging device includes a fixed frame, a water spray pipe and a water spray head, the water spray head is fixed on the fixed frame, the water spray pipe is wound around the fixed frame, and the water spray head and the water spray pipe are connected.

[0006] As a further embodiment of this utility model: a third cavity is provided at the lower part of the main body, the tube is connected to the third cavity, and hot smoke flows in the third cavity.

[0007] As a further embodiment of this utility model: the bottom of the third cavity is a cone, and a pipe is connected to the center of the cone.

[0008] As a further embodiment of this utility model: the third cavity is connected to an oil separation box via the pipe.

[0009] As a further embodiment of this utility model: the first cavity is provided with an air inlet, an air outlet and a second baffle. The air inlet is located at the upper part of the first cavity, and the second baffle is located at the lower part of the first cavity. The second baffle is connected to the first baffle and the bottom inner wall of the first cavity respectively, dividing the lower part of the first cavity into two sections, each section being provided with an air outlet.

[0010] As a further aspect of this utility model: the cross-sections of the first stop and the second stop are triangular.

[0011] As a further embodiment of this utility model: the cross-section of the first cavity is hexagonal, and a circle is inscribed inside the hexagonal side, with the tube body disposed within the circle.

[0012] As a further embodiment of this utility model: the other end of the first stop abuts against the circular area.

[0013] As a further embodiment of this utility model: the tube body is a seamless steel tube, and the tube bodies are spaced 50-60mm apart.

[0014] The beneficial effects of this utility model are: The present invention provides a fresh air preheater with a vertical arrangement. A hot water purging device is installed at the top of the second chamber of the fresh air preheater. When oil and wax adhere to the pipe wall after a period of time, the hot water purging device is automatically activated. Hot water is sprayed out through the water nozzles set above the second chamber, forming a wide-coverage fan-shaped water mist that washes and blows the pipe wall from top to bottom. The oil and wax dissolve and detach from the pipe wall at high temperature and flow downward with the water, thereby ensuring that the fresh air preheater is not blocked or stuck to the wall, and maintains a high-efficiency operating state.

[0015] During operation, the fresh air preheater introduces fresh air through the outside of the duct, recovering heat from the exhaust fumes emitted by the styling machine after shaping. The heat from the exhaust fumes is transferred to the air passing through the fresh air duct, heating the air within the duct. This fresh air preheater not only improves heat exchange efficiency and achieves high-efficiency energy utilization but also reduces pollution caused by direct exhaust fumes, thus protecting the environment. Simultaneously, by improving energy efficiency and reducing equipment failure risks, the fresh air preheater helps lower production costs and enhances the company's competitiveness in the market. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a fresh air preheater; Figure 2 yes Figure 1 AA section view; Figure 3 This is a top view of a fresh air preheater; Figure 4 This is a side view of a partial structure of a fresh air preheater; As shown in the figure: 1-body, 110-first cavity, 111-circle, 112-air inlet, 113-air outlet, 114-first baffle, 115-second baffle, 120-second cavity, 130-third cavity, 131-hot smoke inlet, 132-cone, 140-pipe, 151-fixed frame, 152-water spray pipe, 153-water spray head, 154-electric valve, 160-pipe, 170-oil separation box. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0018] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] like Figure 1-4 As shown, a fresh air preheater includes a body 1, which is vertically arranged. The body 1 is provided with a first cavity 110, and a plurality of tubes 140 are provided inside the first cavity 110. The inside of the tubes 140 is a hot smoke section, and the outside of the tubes 140 is a fresh air section. The hot smoke flows from bottom to top in the hot smoke section. First baffles 114 are connected at intervals on the inner wall of the first cavity 110, and the fresh air flows in a serpentine manner in the fresh air section. A second cavity 120 is provided at the upper part of the body 1, and the tubes 140 are connected to the second cavity 120. A hot water purging device is provided at the top of the second cavity 120.

[0022] In existing technologies, traditional tubular heat exchangers are arranged horizontally in a square configuration. Because the hot fumes from the heat exchanger contain complex components such as oil, wax, dust, and additives, these easily adhere to the inner walls of the heat exchanger tubes. After a period of operation, this leads to blockage of the tube holes, reducing heat exchange efficiency and potentially causing fires or even equipment failure. Therefore, the fresh air preheater of this invention adopts a vertical arrangement. A hot water purging device is installed at the top of the second chamber 120 of the fresh air preheater. When oil and wax adhere to the tube walls of the tube body 140 after a period of time, the hot water purging device automatically activates. Hot water is sprayed out through a spray nozzle located above the second chamber 120, forming a wide-coverage fan-shaped water mist that washes and cleans the tube walls from top to bottom. The oil and wax dissolve and detach from the tube walls at high temperatures, flowing downwards with the water, thus ensuring that the fresh air preheater does not become clogged or stick to the walls, maintaining efficient operation.

[0023] During operation, the fresh air preheater introduces fresh air through the outer side of the duct body 140, recovering heat from the hot smoke discharged after the styling machine has finished shaping. The heat from the hot smoke is transferred to the air passing through the fresh air duct, heating the air within the duct. This fresh air preheater not only improves the heat exchange rate and achieves efficient energy utilization, but also reduces the pollution caused by direct emissions of hot smoke, thus achieving the goal of environmental protection. Simultaneously, by improving energy efficiency and reducing equipment failure risks, the fresh air preheater helps lower production costs for enterprises and enhances their competitiveness in the market.

[0024] In this embodiment, as Figure 1As shown, the hot water purging device includes a fixed frame 151, a water spray pipe 152 and a water spray head 153. The water spray head 153 is fixed on the fixed frame 151, the water spray pipe 152 is wound around the fixed frame 151, and the water spray head 153 and the water spray pipe 152 are connected.

[0025] Specifically, a fixing bracket 151 is installed in the second cavity 120 to fix and spray water pipe 152. The water pipe 152 extends outside the second cavity 120, and the water flow is controlled by an electric valve 154. Specifically, the end of the spray head 153 is a stainless steel spiral nozzle. In use, the spray head 153 sprays hot water with a spray range of 120° or 150°, forming a fan-shaped water mist that covers the pipe 140 inside the second cavity 120. This dissolves the oil, wax, dust, and additives adhering to the inner wall of the pipe 140, causing them to detach from the inner wall of the pipe 140 and flow downwards with the water flow, eventually flowing into the oil and sludge separation box 170. The hot water in the spray pipe 152 is condensed steam discharged from the setting machine, which has a certain pressure. The hot water rinsing temperature is the most suitable oil and wax dissolution temperature point summarized from actual production operation.

[0026] In this embodiment, as Figure 1 and 4 As shown, the lower part of the main body 1 is provided with a third cavity 130, and the pipe 140 is connected to the third cavity 130, through which hot smoke flows. The bottom of the third cavity 130 is a cone 132, and the center of the cone 132 is connected to a pipe 160. The third cavity 130 is connected to an oil-sludge separation box 170 through the pipe 160.

[0027] Specifically, the hot fumes discharged from the stenter enter the third chamber 130 through the hot fumes inlet 131, flow into the tube 140, undergo heat exchange in the first chamber 110, and the heat is reduced; finally, they enter the second chamber 120, pass through the hot water purging device, which dissolves the oil, wax, dust, and additives adhering to the inner wall of the tube 140, and removes them from the inner wall of the tube 140 to form wastewater. The pure hot fumes are introduced into the atmosphere, and the wastewater flows back to the third chamber 130.

[0028] Wastewater flows into the oil-water separation tank 170 through pipe 160. The oil-water separation tank 170 is a device used to separate oil and water in a liquid. Its core principle is based on the density difference between oil and water, achieving efficient separation through physical methods. After treating the oil, the oil-water separation tank 170 discharges it directly into sewers or natural water bodies, avoiding environmental pollution.

[0029] In this embodiment, as Figure 1 and 4As shown, the first cavity 110 is provided with an air inlet 112, an air outlet 113, and a second baffle 115. The air inlet 112 is located at the upper part of the first cavity 110, and the second baffle 115 is located at the lower part of the first cavity 110. The second baffle 115 is connected to the first baffle 114 and the bottom inner wall of the first cavity 110 respectively, dividing the lower part of the first cavity 110 into two sections, each section being provided with an air outlet 113.

[0030] Specifically, two air outlets 113 are provided in the second cavity 120 to facilitate irregular airflow and increase heat transfer efficiency.

[0031] In this embodiment, as Figure 4 As shown, the cross-sections of the first stop 114 and the second stop 115 are triangular.

[0032] Specifically, the cross-section is set as a triangle, increasing the surface area of ​​the first baffle 114 and the second baffle 115. Based on the principles of heat conduction and convection, more heat can be efficiently exchanged with the surrounding environment through the expanded heat dissipation surface, thereby greatly improving the overall heat dissipation efficiency.

[0033] In this embodiment, as Figure 2 and 3 As shown, the first cavity 110 has a hexagonal cross-section, and a circle 111 is inscribed inside the hexagonal side. The tube 140 is located within the circle 111.

[0034] Specifically, the pipe 140 is positioned at the center of the first cavity 110, and hot air flows around the pipe 140. The first cavity 110 is hexagonal, with its inscribed circle filling the entire pipe 140, so that the cavity outside the pipe 140 is no longer a uniform space, but exhibits a characteristic of varying width. When fresh air enters the first cavity 110, its flow velocity is affected by the variation in the width of the cavity space. In areas where the cavity space is narrower, the flow of fresh air is somewhat restricted, and the flow velocity increases; while in areas where the cavity space is wider, the flow resistance of fresh air decreases, and the flow velocity relatively decreases. The heat exchange between the fresh air and the pipe 140 is more thorough, and the heat exchange efficiency is further improved.

[0035] In this embodiment, as Figure 4 As shown, the other end of the first stop 114 abuts against the area of ​​the circle 111.

[0036] Specifically, one end of the first stop 114 is connected to the inner wall of the body 1, and the other end abuts against the outermost pipe 160 within the range of the circle 111.

[0037] In this embodiment, as Figure 1 and 3 As shown, tube 140 is a seamless steel pipe, and the interval between tubes 140 is 50-60mm.

[0038] Specifically, gaps are left between the ducts 140 to facilitate the flow of fresh air and heat exchange. Experiments showed that with a diameter of 1600mm for the circular duct 111 and a diameter of 42mm for the duct 140, 684 ducts 140 were installed. The fresh air volume was 10400 m³ / h, with an initial temperature of 30-40℃, which decreased to 100-110℃ after heat exchange. Similarly, the hot flue gas volume was 22400 m³ / h, with an initial temperature of 180-200℃, which also decreased to 100-110℃ after heat exchange, demonstrating a significant heat exchange effect.

[0039] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fresh air preheater, characterized in that, Includes a body, which is vertically arranged; The main body is provided with a first cavity, and a plurality of tubes are provided inside the first cavity. The tubes are for hot smoke and the tubes are for fresh air. The hot smoke flows from bottom to top in the hot smoke section. First baffles are connected at intervals on the inner wall of the first cavity, and the fresh air flows in a serpentine manner in the fresh air section. The upper part of the main body is provided with a second cavity, the tube is connected to the second cavity, and the top of the second cavity is provided with a hot water purging device.

2. The fresh air preheater according to claim 1, characterized in that, The hot water purging device includes a fixed frame, a water spray pipe, and a water spray head. The water spray head is fixed on the fixed frame, the water spray pipe is wound around the fixed frame, and the water spray head is connected to the water spray pipe.

3. The fresh air preheater according to claim 1 or 2, characterized in that, The lower part of the main body is provided with a third cavity, and the tube is connected to the third cavity, through which hot smoke flows.

4. The fresh air preheater according to claim 3, characterized in that, The bottom of the third cavity is a cone, and a pipe is connected to the center of the cone.

5. The fresh air preheater according to claim 4, characterized in that, The third cavity is connected to an oil separation box via the pipe.

6. The fresh air preheater according to claim 1, characterized in that, The first cavity is provided with an air inlet, an air outlet, and a second baffle. The air inlet is located at the upper part of the first cavity, and the second baffle is located at the lower part of the first cavity. The second baffle is connected to the first baffle and the bottom inner wall of the first cavity, respectively, dividing the lower part of the first cavity into two sections, each of which is provided with an air outlet.

7. The fresh air preheater according to claim 6, characterized in that, The cross-sections of the first stop and the second stop are triangular.

8. The fresh air preheater according to claim 1, characterized in that, The first cavity has a hexagonal cross-section, with a circle inscribed inside the hexagonal side, and the tube is positioned within the circle.

9. The fresh air preheater according to claim 8, characterized in that, The other end of the first stop abuts against the circular area.

10. The fresh air preheater according to claim 9, characterized in that, The tube body is a seamless steel pipe, and the tube bodies are spaced 50-60mm apart.

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