Silencing heater

Abstract

The silencing heater comprises an inner cylinder, an outer cylinder and a silencing piece, the outer cylinder is arranged outside the inner cylinder in a sleeving mode, the inner cylinder is provided with an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe both penetrate through the outer cylinder; a heating element is arranged in the inner cylinder, and gas enters the inner cylinder from the gas inlet pipe, is heated by the heating element and then is discharged from the gas outlet pipe; hollowed-out holes are formed in the peripheral wall of the inner barrel, a silencing part is arranged in the outer barrel, and gas in the inner barrel penetrates through the hollowed-out holes to collide with the silencing part so as to conduct silencing. According to the invention, the functions of silencing and heating are integrated; the invention has the advantages that the floor space is saved, the arrangement of a pipeline system is facilitated, the resistance loss of the pipeline system is reduced, and the operation performance of equipment is improved, and is suitable for compressed air pipeline systems with high decibel noise and high temperature requirements, such as outlets of Roots blowers and outlets of air compressors, or other types of gas pipeline projects needing heating and silencing.

Description

Technical Field

[0001] The present application relates to the technical field of air pollution control, and more specifically, to a silencer heater. Background Art

[0002] One of the pollutant indicators in air pollution control is sulfur dioxide. To remove sulfur dioxide from industrial flue gas, most dry / semi-dry processes use the reaction of slaked lime with sulfur dioxide. Dry powder slaked lime is usually transported pneumatically using compressed air. The greater the pressure of the compressed air used to transport the slaked lime, the better the conveying effect (conveying capacity, dry powder fluidity, and dry powder dispersion). A large resistance loss in the pipeline system will reduce the conveying effect.

[0003] Since Roots blowers are used for pressurization, the noise at the compressed air outlet is relatively high. Secondly, slaked lime is also extremely easy to absorb moisture. After absorbing moisture, slaked lime tends to stick to the pipe wall and block the pipe, increasing the resistance loss of the pipeline system and affecting the transportation effect. If the pressure head of the Roots blower is increased or personnel are assigned to clear the blockage, the investment cost or maintenance cost will increase. In the existing technology, pipe heaters and pipe silencers are installed on the compressed air pipeline to meet the heating and silencing needs. Since most desulfurization modification projects in the existing technology have limited space, the installation of multiple sets of equipment such as pipe heaters and pipe silencers takes up a lot of space, and the pipeline system layout is prone to problems such as being not smooth. Summary of the Invention

[0004] The present application provides a silencer heater that realizes the integration of silencer and heating functions; saves floor space and facilitates the layout of the pipeline system, while reducing the resistance loss of the pipeline system and improving the operating performance of the equipment.

[0005] The present application provides a noise-reducing heater that adopts the following technical solution:

[0006] A noise-absorbing heater, comprising:

[0007] The inner cylinder is provided with an air inlet pipe and an air outlet pipe. A heating element is provided inside the inner cylinder. Gas enters the inner cylinder from the air inlet pipe, is heated by the heating element, and then exits from the air outlet pipe. The peripheral wall of the inner cylinder is provided with hollow holes.

[0008] An outer cylinder is sleeved outside the inner cylinder, and the air inlet pipe and the air outlet pipe both pass through the outer cylinder;

[0009] The silencer is arranged inside the outer cylinder, and the gas in the inner cylinder passes through the hollow hole and collides with the silencer to silence the sound.

[0010] Optionally, the heating element is arranged along the length direction of the inner tube; a plurality of guide plates are arranged along the length direction of the inner tube, and the plurality of guide plates are arranged in the inner tube at intervals and staggered, and are located in the heating element layout area.

[0011] Optionally, the heating element is a steam heating pipe, and the steam heating pipe includes a steam inlet and a steam outlet, and the steam inlet and the steam outlet both pass through the outer cylinder and are arranged outside the outer cylinder.

[0012] Optionally, the steam heating pipe further includes a steam heating section, the length direction of the steam heating section is the same as the length direction of the inner tube, and the steam heating section is arranged in a spiral shape.

[0013] Optionally, it further includes a wiring assembly arranged on the inner cylinder; the heating element is an electric heating pipe, a plurality of the electric heating pipes are provided, and the electric heating pipes are electrically connected to the wiring assembly.

[0014] Optionally, the silencer is a sound-absorbing cotton, which is filled between the outer wall of the inner tube and the inner wall of the outer tube and covers the inner tube.

[0015] Optionally, the air outlet pipe is arranged at one end of the inner tube, and a streamlined throat is arranged between the end of the inner tube close to the air outlet pipe and the air outlet pipe.

[0016] Optionally, it further includes a plurality of temperature measuring elements, one end of each of which is disposed in the inner tube; wherein at least one of the temperature measuring elements is disposed close to the air outlet pipe to detect the temperature of one end of the inner tube close to the air outlet pipe.

[0017] Optionally, it further includes a drain pipe and a drain valve, one end of the drain pipe passes through the outer cylinder and is connected to the inner cylinder, and the drain valve is arranged at the end of the drain pipe away from the inner cylinder to control the opening and closing of the drain pipe.

[0018] Optionally, an expansion joint is further included, and the inner cylinder and the outer cylinder are fixedly connected via the expansion joint.

[0019] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0020] The air enters the inner cylinder through the air inlet pipe, and the gas in the inner cylinder is heated and heated by the heating element. At the same time, the gas in the inner cylinder passes through the hollow hole and collides with the silencer to achieve a silencing effect. The gas in the inner cylinder is heated and heated and then discharged through the air outlet pipe, thereby reducing the probability of pipeline blockage due to gas moisture and reducing the noise at the outlet of the air outlet, thus realizing the integration of silencing and heating functions. The present application integrates silencing and heating optimization into one device. The integrated design optimizes the equipment material consumption, saves space and facilitates the layout of the pipeline system. At the same time, it solves the silencing and heating problems on the gas pipeline, reduces the resistance loss of the pipeline system, and improves the equipment operation performance. It is suitable for compressed air pipeline systems with high decibel noise such as Roots blower outlet and air compressor outlet that require high temperature, or other types of gas pipeline projects that require heating and silencing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in this application, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure of a noise-reducing heater disclosed in Example 1 of the present application;

[0023] Figure 2 This is a schematic diagram of the overall structure of a noise-reducing heater disclosed in Example 2 of the present application;

[0024] Figure 3 This is a structural schematic diagram of a silencer heater device disclosed in this application, highlighting the hollow holes provided on the inner cylinder.

[0025] Description of reference numerals:

[0026] 1. Inner tube; 111. Air inlet pipe; 112. Air outlet pipe; 113. Hollow hole; 2. Outer tube; 3. Silencer; 4. Guide plate; 5. Steam heating pipe; 51. Steam inlet; 52. Steam outlet; 53. Steam heating section; 6. Electric heating pipe; 7. Wiring assembly; 8. Temperature measuring element; 9. Drain pipe; 10. Drain valve; 11. Expansion joint. DETAILED DESCRIPTION

[0027] The present application is further described in detail below with reference to the accompanying drawings.

[0028] This application discloses a noise-absorbing heater that combines noise reduction and heating functions. It saves space, facilitates piping system layout, reduces resistance losses, and improves equipment performance. It is suitable for high-temperature compressed air piping systems such as those at Roots blower and air compressor outlets, which generate high decibel noise, or other types of gas piping requiring both heating and noise reduction.

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] The terms "first," "second," "third," "fourth," and the like in the specification and claims of the present invention and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] See also Figures 1 to 3 The present application discloses a silencer heater comprising an inner tube 1, an outer tube 2, and a silencer 3. The outer tube 2 is sleeved on the outer tube 1. The length direction of the outer tube 2 is the same as that of the inner tube 1. The central axes of the outer tube 2 and the inner tube 1 coincide. The silencer 3 is arranged inside the outer tube 2 to achieve a silencer effect. In order to achieve mutual fixation between the inner tube 1 and the outer tube 2, the silencer heater further comprises an expansion joint 11. The expansion joint 11 is located at the end of the outer tube 2. The inner tube 1 and the outer tube 2 are fixedly connected via the expansion joint 11. Multiple expansion joints 11 can be provided as needed, and they are located at different positions of the outer tube 2 to enhance the installation stability between the inner tube 1 and the outer tube 2.

[0032] Both the inner and outer cylinders 1 and 2 are installed horizontally. In other embodiments, the inner and outer cylinders 1 and 2 can be installed vertically, and all such installation methods are within the scope of protection of this application. The outer cylinder 2 is provided with two legs on its circumference to enhance installation stability. These legs are located near the ends of the outer cylinder 2 and secure the outer cylinder in place, enabling either horizontal or vertical installation.

[0033] Inner tube 1 is equipped with an inlet pipe 111 and an outlet pipe 112 for gas circulation. Both pipes pass through outer tube 2 to facilitate connection to gas supply equipment. A heating element is installed within inner tube 1. Gas enters inner tube 1 through inlet pipe 111, is heated by the heating element, and then exits through outlet pipe 112, thereby heating the gas entering inner tube 1. The circumferential wall of inner tube 1 is provided with hollow holes 113. Multiple hollow holes 113 can be evenly distributed along the circumference of inner tube 1. Gas in inner tube 1 passes through hollow holes 113 and strikes silencer 3, thereby silencing the gas. It can be understood that the air enters the inner tube 1 through the air inlet pipe 111, and the gas in the inner tube 1 is heated and heated by the heating element. At the same time, the gas in the inner tube 1 passes through the hollow hole 113 and collides with the silencer 3 to achieve a silencer effect. The gas in the inner tube 1 is heated and heated and then discharged through the air outlet pipe 112, thereby reducing the probability of pipeline blockage due to gas moisture, and at the same time reducing the noise at the outlet of the air outlet pipe 112, realizing the integration of silencer and heating functions; the present application integrates silencer and heating optimization into one device, and the integrated design optimizes the equipment material consumption, saves space and facilitates the layout of the pipeline system, while solving the silencer and heating problems on the gas pipeline, reducing the resistance loss of the pipeline system, and improving the equipment operation performance.

[0034] To enhance the heating effect on the gas in the inner tube 1, heating elements are arranged along the length of the inner tube 1, with the gas flow direction being the same as the direction in which the heating elements are arranged. This increases the heating area of ​​the heating elements on the one hand, and the time the gas spends flowing through the heating elements on the other, thereby enhancing the heating effect on the gas. Furthermore, multiple guide plates 4 are arranged along the length of the inner tube 1, staggered and arranged in the inner tube 1 at intervals, and located in the area where the heating elements are arranged. As the gas flows along the length of the inner tube 1, upon encountering the guide plates 4, some of the gas is blocked and returned, thereby increasing the time the gas remains in the area where the heating elements are arranged. The staggered arrangement of the multiple guide plates 4 further enhances the heating effect on the gas in the inner tube 1.

[0035] In the present application, the silencer 3 is a silencer cotton, which is filled between the outer wall of the inner tube 1 and the inner wall of the outer tube 2, and covers the inner tube 1. The gas enters the inner tube 1 through the air inlet pipe 111. The hollow holes 113 provided on the inner tube 1 can diffuse the airflow to the silencer cotton, and the collision between the gas medium and the silencer cotton achieves the function of silencing and reducing noise. The hollow holes 113 are preferably waist-shaped holes. Regardless of whether the size and shape of the hollow holes 113 are consistent with the present application, they are deemed to be within the scope of protection of the present application. In other embodiments, a silencer can also be used. Since the silencer contains a complex channel structure, it can guide the airflow through multiple reflections and diffusions, so that the energy is dispersed to achieve the effect of silencing and reducing noise.

[0036] The silent heater also includes a drain pipe 9 and a drain valve 10 for draining waste from the inner tube 1. One end of the drain pipe 9 passes through the outer tube 2 and connects to the inner tube 1, allowing impurities within the inner tube 1 to be removed. It is understood that during the heating process, if the gas contains solid particles, water vapor, or other light suspended matter, the heating causes these impurities to precipitate or condense as the temperature changes, resulting in the separation of existing impurities in the gas. Furthermore, over long-term operation, high temperatures may cause oxidation or corrosion products to accumulate within the inner tube 1, forming deposits that accumulate within the inner tube 1. Impurities within the inner tube 1 can then be discharged through the drain pipe 9. The drain valve 10 is located at the end of the drain pipe 9 away from the inner tube 1 and controls the opening and closing of the drain pipe 9. During operation, the drain valve 10 is closed to prevent heat loss from the inner tube 1 and ensure proper operation. At the end of operation, when impurities need to be discharged, the drain valve 10 is opened to allow the impurities within the inner tube 1 to be discharged through the drain pipe 9.

[0037] In order to achieve precise control of the temperature inside the inner tube 1, the silencer heater also includes a plurality of temperature measuring elements 8, one end of which is disposed inside the inner tube 1. The plurality of temperature measuring elements 8 are disposed at different positions of the inner tube 1 as required to detect the gas temperature in different areas of the inner tube 1. The temperature difference feedback at different positions is used to adjust the heating element, thereby further achieving refined control of the temperature inside the inner tube 1. For example, the temperature measuring element 8 is disposed near the air inlet pipe 111 to detect the initial temperature of the gas entering the inner tube 1, and the temperature measuring element 8 is disposed near the air outlet pipe 112 to detect the temperature of the gas flowing out of the inner tube 1. At least one temperature measuring element 8 is disposed near the air outlet pipe 112 to detect the temperature of the inner tube 1 near one end of the air outlet pipe 112 to ensure that the temperature of the gas flowing out of the air outlet pipe 112 meets the preset temperature.

[0038] See also Figure 1, is a specific embodiment of the silencer heater of the present application. In this embodiment, the heating element is a steam heating pipe 5. The steam heating pipe 5 includes a steam inlet 51, a steam outlet 52, and a steam heating section 53. The steam inlet 51 and the steam outlet 52 are both passed through the outer tube 2 and are arranged on the outside of the outer tube 2 to facilitate connection with the steam equipment. In this embodiment, the length direction of the steam heating section 53 is the same as the length direction of the inner tube 1. The steam heating section 53 is arranged in a spiral shape to increase the area of ​​the steam heating section 53. It can be understood that steam is transported to the steam heating section 53 through the steam inlet 51. The steam transfers its own heat energy to the tube wall. As the gas contacts the tube wall, the gas molecules absorb heat through heat conduction, causing its temperature to rise. The heated gas expands in volume, rises and contacts the cold top, and then flows downward. The whole process is accompanied by heat exchange and gas mixing, which increases the overall temperature of the gas in the inner tube 1. This heating method is simple and suitable for a variety of application scenarios where the gas temperature needs to be quickly increased.

[0039] In this embodiment, an inlet pipe 111 and an outlet pipe 112 are disposed at either end of the inner tube 1. These pipes can be connected to the gas supply equipment using any of the following connection methods: flange connection, welding, or threaded connection. A temperature measuring element 8 is disposed at one end of the inner tube 1, near the inlet pipe 111, for detecting the initial temperature of the gas entering the inner tube 1. A temperature measuring element 8 is disposed at the other end of the inner tube 1, not near the outlet pipe 112, for detecting the temperature of the gas flowing out of the inner tube 1.

[0040] The central region of the inner tube 1 is cylindrical. A streamlined throat is formed between the end of the inner tube 1 near the inlet pipe 111 and the inlet pipe 111. A streamlined throat is also formed between the end of the inner tube 1 near the outlet pipe 112 and the outlet pipe 112. As can be understood, when air enters the inner tube 1 through the small opening of the inlet pipe 111, it is more easily pushed, reducing energy consumption during the intake process and, in other words, lowering aerodynamic pressure losses. Furthermore, because the central region of the inner tube 1 has a larger volume and can accommodate more airflow, air entering through the small opening of the inlet pipe 111 helps accelerate airflow, ensuring more even distribution of the air and its dust content, promoting contact between the air and the heating element, and facilitating heating of the air. As air flows from the inner tube 1 into the small opening of the outlet pipe 112, the opening gradually decreases in size as it approaches the outlet, potentially changing the turbulence of the airflow, thereby reducing noise and also enabling control of gas flow.

[0041] See also Figure 2, another specific embodiment of the noise-absorbing heater of the present application. In this embodiment, the heating element is an electric heating pipe 6. Multiple electric heating pipes 6 are provided, and the multiple electric heating pipes 6 are arranged side by side and spaced apart, increasing the area of ​​the electric heating pipes 6 in contact with the gas, thereby improving the efficiency of heat exchange. The electric heating pipes 6 are arranged in a U-shape. In other embodiments, the electric heating pipes can also be arranged in other shapes.

[0042] In order to energize the electric heating pipe 6, the silencer heater also includes a wiring assembly 7 provided on the inner tube 1, and the electric heating pipe 6 is electrically connected to the wiring assembly 7. The wiring assembly 7 is provided at one end of the inner tube 1, and the wiring assembly 7 includes a wiring box and a wiring hole. The wiring hole is configured on the wall of the inner tube 1, and the wires in the wiring box are electrically connected to the external power supply via the wiring hole. In other embodiments, the heating method can also be a resistance belt (soft belt) winding, which is wrapped around the inner tube 1 to heat and insulate the inner tube 1. The above heating methods are all within the scope of protection of this application.

[0043] In this embodiment, an air inlet pipe 111 is disposed on the sidewall of the inner tube 1, near the terminal assembly 7. A temperature measuring element 8 is installed on the air inlet pipe 111 to detect the initial temperature of the gas entering the inner tube 1. A temperature measuring element 8 is also installed on the inner tube 1 near the air outlet pipe 112 to detect the temperature of the gas flowing out of the inner tube 1. The air outlet pipe 112 is disposed at the end of the inner tube 1 away from the terminal assembly 7. A streamlined throat is formed between the end of the inner tube 1 near the air outlet pipe 112 and the air outlet pipe 112.

[0044] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A noise-absorbing heater, characterized in that: include: The inner cylinder is provided with an air inlet pipe and an air outlet pipe. A heating element is provided inside the inner cylinder. Gas enters the inner cylinder from the air inlet pipe and is heated by the heating element before being discharged from the air outlet pipe. The peripheral wall of the inner cylinder is provided with hollow holes. An outer cylinder is sleeved outside the inner cylinder, and the air inlet pipe and the air outlet pipe are both passed through the outer cylinder; The silencer is arranged inside the outer tube, and the gas in the inner tube passes through the hollow hole and collides with the silencer to silence the sound.

2. A noise-absorbing heater according to claim 1, characterized in that: The heating element is arranged along the length direction of the inner tube; a plurality of guide plates are arranged along the length direction of the inner tube, and the plurality of guide plates are arranged in the inner tube in an interlaced manner at intervals and are located in the heating element arrangement area.

3. A noise-absorbing heater according to claim 1 or 2, characterized in that: The heating element is a steam heating pipe, and the steam heating pipe comprises a steam inlet and a steam outlet. Both the steam inlet and the steam outlet pass through the outer cylinder and are arranged outside the outer cylinder.

4. A noise-absorbing heater according to claim 3, characterized in that: The steam heating pipeline further comprises a steam heating section, the length direction of the steam heating section is the same as the length direction of the inner tube, and the steam heating section is arranged in a spiral shape.

5. A noise-absorbing heater according to claim 1 or 2, characterized in that: It also includes a wiring assembly arranged on the inner tube; the heating element is an electric heating pipe, a plurality of the electric heating pipes are arranged, and the electric heating pipes are electrically connected to the wiring assembly.

6. A noise-absorbing heater according to claim 1, characterized in that: The silencer is a sound-absorbing cotton, which is filled between the outer wall of the inner tube and the inner wall of the outer tube and covers the inner tube.

7. A noise-absorbing heater according to claim 1, characterized in that: The air outlet pipe is arranged at one end of the inner tube, and a streamlined throat is arranged between the end of the inner tube close to the air outlet pipe and the air outlet pipe.

8. The noise-absorbing heater according to claim 1, characterized in that: It also includes a plurality of temperature measuring elements, one end of each of which is disposed in the inner cylinder; Wherein, at least one of the temperature measuring elements is arranged close to the air outlet pipe to detect the temperature of one end of the inner cylinder close to the air outlet pipe.

9. The noise-absorbing heater according to claim 1, characterized in that: It also includes a sewage pipe and a sewage valve. One end of the sewage pipe passes through the outer cylinder and is connected to the inner cylinder. The sewage valve is arranged at one end of the sewage pipe away from the inner cylinder to control the opening and closing of the sewage pipe.

10. The noise-absorbing heater according to claim 1, characterized in that: It also includes an expansion joint, and the inner cylinder and the outer cylinder are fixedly connected through the expansion joint.

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