Small-flow temperature and pressure reducing device

Abstract

The utility model relates to the technical field of high-temperature steam treatment equipment, in particular to a small-flow temperature and pressure reducing device which comprises an air inlet pipe, a pressure reducing valve, a steam pipeline and a temperature reducing water nozzle, one end of the air inlet pipe is connected with the pressure reducing valve through a flange, and the output end of the pressure reducing valve is connected with the steam pipeline through a flange. A desuperheating water nozzle is installed at the top of the steam pipeline in a penetrating mode, a fixing base is installed on the outer surface of the front end of the steam pipeline, the top of the fixing base and the desuperheating water nozzle are installed in a penetrating mode, and a noise reduction assembly is arranged in the fixing base and used for reducing noise generated in the process that steam is cooled and decompressed. According to the steam temperature and pressure reducing device, noise in the steam temperature and pressure reducing treatment process is reduced through the silencing pore plate and the noise reducing assembly, energy of part of noise is absorbed, noise is reduced, and noise generated in the working process of the temperature and pressure reducing device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature steam processing equipment, in particular to a small-flow temperature and pressure reduction device. Background Art

[0002] A temperature and pressure reduction device is a device used for steam system control. It can reduce the temperature and pressure of steam to a level suitable for industrial applications. Various high-temperature and high-pressure steam produced by thermal power, chemical and other enterprises often need to be cooled and reduced in pressure before they can be supplied to subsequent processes. Therefore, a temperature and pressure reduction device is needed.

[0003] Patent document CN218426800U discloses a temperature-reducing and pressure-reducing device that is easy to install. The temperature-reducing and pressure-reducing device bracket in the patent document can be aligned and installed very conveniently. However, the temperature-reducing and pressure-reducing device in the patent document does not take into account that when steam passes through the temperature-reducing and pressure-reducing device, the sudden expansion and compression of the gas will cause collisions between gas molecules and generate large noise through the pipeline. Utility Model Content

[0004] One purpose of the present application is to provide a small flow rate temperature reduction and pressure reduction device to solve the problem that the temperature reduction and pressure reduction device in the prior art generates relatively large noise during the temperature reduction and pressure reduction process of steam.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a small-flow temperature and pressure reduction device, comprising an air inlet pipe, a pressure reducing valve, a steam pipe, and a temperature-reducing water nozzle, wherein one end of the air inlet pipe is connected to the pressure reducing valve via a flange, the output end of the pressure reducing valve is connected to the steam pipe via a flange, the top of the steam pipe is penetrated by the temperature-reducing water nozzle, a fixing seat is installed on the front end outer surface of the steam pipe, and the top of the fixing seat is penetrated by the temperature-reducing water nozzle, a noise reduction component is provided inside the fixing seat, and the noise reduction component is used to reduce the noise generated during the process of steam being cooled and pressure-reduced;

[0006] The noise reduction component includes a sound insulation tube, sound-absorbing cotton and an annular cavity. The sound insulation tube is fixedly installed on the inner side of the fixing seat, and the sound insulation tube is made of hard sound insulation material. Sound-absorbing cotton is fixedly installed on the inner wall of the sound insulation tube. An annular cavity is provided on the inner side of the sound-absorbing cotton of the sound insulation tube and the outer side of the steam pipe.

[0007] Preferably, a silencer plate is embedded in the inner wall of the input end of the steam pipe, and the output end of the steam pipe is connected to an air outlet pipe via a flange.

[0008] Preferably, a spring safety valve is connected to the top of the steam pipe via a flange, and the spring safety valve is located at the rear end of the desuperheating water nozzle, and the output end of the spring safety valve is connected to an exhaust pipe.

[0009] Preferably, the input end of the desuperheating water nozzle is connected to a first check valve, and the input end of the first check valve is connected to a desuperheating water pipeline.

[0010] Preferably, the input end of the desuperheating water pipeline is connected to a regulating valve, the input end of the regulating valve is connected to a stop valve through a pipeline and a flange, and the input end of the stop valve is connected to a water inlet pipe.

[0011] Preferably, an arc-shaped partition is installed on the inner wall of the rear end of the steam pipe, and the arc of the arc-shaped partition is bent toward the bottom wall of the pipe. A fine through hole is opened through the top of the arc-shaped partition. A drain pipe is connected to the bottom of the steam pipe, and the drain pipe and the space formed by the arc-shaped partition and the bottom wall of the steam pipe are connected.

[0012] Preferably, the output end of the drain pipe is connected to a steam trap, and the output end of the steam trap is connected to a second check valve through a pipeline and a flange.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model reduces noise during the steam cooling and decompression process through a silencer orifice and a noise reduction component. The silencer orifice inside the steam pipe can disperse the pressure drop and flow rate of the high-temperature steam after decompression, thereby effectively reducing noise. During the preliminary mixing of the decompressed steam and the water mist sprayed from the decompression water nozzle, the sound insulation tube seals the steam pipe in the process, isolating the noise generated inside the pipe in this area, and the annular cavity absorbs the energy of the noise vibration in the pipe. When the noise in the pipe propagates to the position of the sound-absorbing cotton, due to the viscous resistance of the air and the friction between the air and the hole wall, a considerable part of the sound energy is converted into heat energy by the porous structure of the sound-absorbing cotton and is consumed, thereby absorbing part of the noise energy, reducing noise, and reducing the noise generated during the operation of the cooling and decompression device.

[0015] 2. In the present invention, the cooling and decompression processes are carried out in a distributed manner. Since the flow load of steam is reduced after decompression, the atomization effect is poor after contact with the cooling water, resulting in a large amount of water accumulation in the pipeline. The accumulated water enters the space below the arc-shaped partition through the fine through-holes and enters the drain pipe. The combination of the steam trap and the second check valve can prevent the steam from being discharged from the drain pipe and can also prevent the reverse flow of the accumulated water. The accumulated water inside the steam pipe is discharged from the drain pipe, which can avoid the imbalance of temperature control caused by the presence of a large amount of accumulated water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of the fixing seat of the present utility model;

[0018] Figure 3This is a cross-sectional view of the front end structure of the steam pipe of the present utility model;

[0019] Figure 4 This is a cross-sectional view of the rear end structure of the steam pipeline of the present invention.

[0020] In the figure: 1. Air inlet pipe; 2. Pressure reducing valve; 3. Steam pipe; 4. Cooling water nozzle; 5. Spring safety valve; 6. Air outlet pipe; 7. Silencer plate; 8. Fixing seat; 9. Sound insulation tube; 10. Sound-absorbing cotton; 11. Annular cavity; 12. Cooling water pipe; 13. First check valve; 14. Regulating valve; 15. Stop valve; 16. Water inlet pipe; 17. Exhaust pipe; 18. Arc partition; 19. Fine through hole; 20. Drain pipe; 21. Steam trap; 22. Second check valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0024] The following is combined with Figure 1-4 , the technical solution of the utility model is further explained:

[0025] Example 1: Figure 1 、 Figure 2 and Figure 3 As shown, a small-flow cooling and pressure reduction device includes an air inlet pipe 1, a pressure reducing valve 2, a steam pipe 3 and a cooling water nozzle 4. One end of the air inlet pipe 1 is connected to the pressure reducing valve 2 through a flange, and the output end of the pressure reducing valve 2 is connected to the steam pipe 3 through a flange. The top of the steam pipe 3 is penetrated by a cooling water nozzle 4, and a fixing seat 8 is installed on the front end outer surface of the steam pipe 3, and the top of the fixing seat 8 is penetrated by the cooling water nozzle 4. A noise reduction component is provided inside the fixing seat 8, and the noise reduction component is used to reduce the noise generated during the cooling and pressure reduction process of the steam. The noise reduction component includes a sound insulation tube 9, sound-absorbing cotton 10 and an annular cavity 11. The sound insulation tube 9 is fixedly installed on the inner side of the fixing seat 8, and the sound insulation tube 9 is made of hard sound insulation material. The inner wall of the sound insulation tube 9 is fixedly installed with sound-absorbing cotton 10, and an annular cavity 11 is provided on the inner side of the sound-absorbing cotton 10 of the sound insulation tube 9 and the outer side of the steam pipe 3. A silencer plate 7 is embedded in the inner wall of the input end of the steam pipe 3 , and an outlet pipe 6 is connected to the output end of the steam pipe 3 via a flange. The air inlet pipe 1 provides a connection position for the pressure reducing valve 2, and provides an entry channel for high-temperature and high-pressure steam to enter the cooling and reheating device. The pressure reducing valve 2 can reduce the pressure of high-temperature and high-pressure steam. The pressure reducing valve 2 is connected to the steam pipe 3 so that the steam after decompression enters the steam pipe 3. The steam pipe 3 provides space for the cooling process of the steam after decompression. The cooling water nozzle 4 is used to spray cooling water spray into the steam pipe 3 so that the spray contacts the gas after decompression to reduce the temperature of the gas after decompression. The steam pipe 3 provides an installation position for the fixing seat 8 and the silencer orifice plate 7, and provides a connection position for the air outlet pipe 6. The fixing seat 8 provides an installation position for the noise reduction component. The silencer orifice plate 7 is based on the design principle of the small hole injection silencer. It reduces the sound power by dispersing the pressure drop and reducing the flow rate, thereby achieving a silencing effect. This design can not only effectively reduce noise, but also make the equipment run more smoothly and quietly. The sound insulation tube 9 provides an installation position for the sound-absorbing cotton 10. The annular cavity 11 formed by the outer surface of the cylinder 9 and the steam pipe 3 can reduce noise to a certain extent; when the temperature reduction and pressure reduction device processes high-temperature and high-pressure steam, the silencer orifice 7 inside the steam pipe 3 can disperse the pressure drop and flow rate of the high-temperature steam after pressure reduction, thereby effectively reducing noise. During the preliminary mixing of the steam after pressure reduction and the water mist sprayed from the temperature reduction water nozzle 4, the sound insulation cylinder 9 closes the steam pipe 3 in the process, isolating the noise generated inside the pipe in this area, and the annular cavity 11 can absorb the energy of the noise vibration in the pipe. When the noise in the pipe propagates to the position of the sound-absorbing cotton 10, due to the viscous resistance of the air and the friction between the air and the hole wall, a considerable part of the sound energy is converted into heat energy by the porous structure of the sound-absorbing cotton 10 and consumed, thereby absorbing part of the noise energy and reducing noise. The noise reduction during the steam temperature reduction and pressure reduction process by the silencer orifice 7 and the noise reduction component reduces the noise generated during the operation of the temperature reduction and pressure reduction device.

[0026] Example 2: Figure 1 As shown, a spring-loaded safety valve 5 is flanged to the top of the steam pipe 3 and located at the rear end of the desuperheating water nozzle 4. The output of the spring-loaded safety valve 5 is connected to an exhaust pipe 17. The input of the desuperheating water nozzle 4 is connected to a first check valve 13, which is in turn connected to the desuperheating water pipe 12. The input of the desuperheating water pipe 12 is connected to a regulating valve 14, which is connected to a stop valve 15 via pipes and flanges. The input of the stop valve 15 is connected to a water inlet pipe 16. The steam pipe 3 provides an installation position for the spring safety valve 5, the spring safety valve 5 provides an installation position for the exhaust pipe 17, and the spring safety valve 5 can ensure that the pressure in the steam pipe 3 is not too high, and the exhaust pipe 17 provides a discharge outlet for the decompressed steam. The cooling water nozzle 4 provides an installation position for the first check valve 13, the first check valve 13 provides an installation position for the cooling water pipe 12, the cooling water pipe 12 provides an installation position for the regulating valve 14, the regulating valve 14 provides a connection position for the stop valve 15, and the stop valve 15 provides a connection position for the water inlet pipe 16. The water inlet pipe 16 can reduce the pressure. Warm water enters the cooling water pipe 12 through the stop valve 15 and the regulating valve 14; when the low-flow cooling and pressure reducing device is working, cooling water is input into the device through the water inlet pipe 16, the stop valve 15 is used to cut off the flow of cooling water, and the regulating valve 14 can adjust the flow of cooling water and reduce the pressure and temperature of the cooling water by controlling the opening of the opening and closing parts in the valve body. The first check valve 13 prevents the backflow of cooling water and ensures that the cooling water flows to the cooling water nozzle 4; when the steam pressure inside the steam pipe 3 is too high, the spring safety valve 5 will discharge part of the steam through the exhaust pipe 17 to reduce the pressure.

[0027] Example 3: Figure 1 and Figure 4As shown, a curved baffle 18 is installed on the rear inner wall of the steam pipe 3. The arc of the curved baffle 18 bends toward the bottom wall of the pipe. A small through-hole 19 is formed through the top of the curved baffle 18. A drain pipe 20 is connected to the bottom of the steam pipe 3. The drain pipe 20 and the space formed by the curved baffle 18 and the bottom wall of the steam pipe 3 are in communication. The output end of the drain pipe 20 is connected to a steam trap 21. The output end of the steam trap 21 is connected to a second check valve 22 via a pipe and a flange. The steam pipe 3 provides an installation position for the arc-shaped partition 18, and the arc-shaped partition 18 provides an opening position for the fine through hole 19. The fine through hole 19 can allow the accumulated water that has not been mixed with the steam to enter the space formed by the arc-shaped partition 18 and the steam pipe 3. The steam pipe 3 provides a connection position for the drain pipe 20. The drain pipe 20 can discharge the accumulated water in the space formed by the arc-shaped partition 18 and the steam pipe 3 out of the steam pipe 3 and provides a connection position for the steam trap 21. The steam trap 21 provides a connection position for the second check valve 22. In the temperature reduction and pressure reduction device During operation, the cooling and decompression processes are carried out in a distributed manner. Since the flow load of steam is reduced after decompression, the atomization effect is poor after contact with the cooling water, resulting in a large amount of water accumulation in the pipeline. The accumulated water enters the space below the arc partition 18 through the fine through-hole 19 and enters the drain pipe 20, and is discharged from the steam pipe 3 from the drain pipe 20 to avoid the temperature control imbalance caused by the presence of a large amount of accumulated water. The combination of the steam trap 21 and the second check valve 22 can prevent steam from being discharged from the drain pipe 20, and can also prevent the reverse flow of accumulated water.

[0028] Working principle: Before using the temperature reduction and pressure reduction device, you should first check whether the temperature reduction and pressure reduction device has any problems that affect its use. First, place the temperature reduction and pressure reduction device at the location where it needs to be used, input high-temperature and high-pressure steam through the air inlet pipe 1, and the pressure reducing valve 2 reduces the pressure of the high-temperature and high-pressure steam. The steam after pressure reduction enters the steam pipe 3, and the temperature reduction water nozzle 4 sprays a temperature reduction water spray into the steam pipe 3, so that the spray contacts the gas after pressure reduction, and the gas after pressure reduction is cooled. When the temperature reduction and pressure reduction device processes the high-temperature and high-pressure steam, the silencer orifice 7 inside the steam pipe 3 can disperse the pressure drop and flow rate of the high-temperature steam after pressure reduction, thereby effectively reducing noise. During the initial mixing of the steam after pressure reduction and the water mist sprayed from the temperature reduction water nozzle 4, the sound insulation tube 9 closes the steam pipe 3 in the process, isolating the noise generated inside the pipe in this area, and the annular cavity 11 can absorb the energy of the noise vibration in the pipe. When the noise in the pipe When the sound propagates to the position of the sound-absorbing cotton 10, due to the viscous resistance of the air and the friction between the air and the hole wall, a considerable part of the sound energy is converted into heat energy by the porous structure of the sound-absorbing cotton 10 and consumed, thereby absorbing part of the noise energy and reducing the noise. The noise is reduced during the steam cooling and decompression process by the silencer plate 7 and the noise reduction component, thereby reducing the noise generated during the operation of the cooling and decompression device; when the cooling and decompression device is working, the cooling and decompression process is carried out in a distributed manner. Since the steam will reduce the flow load after decompression, the atomization effect is poor after contact with the cooling water, resulting in a large amount of water accumulation in the pipeline. The accumulated water enters the space below the arc partition 18 through the fine through-hole 19 and enters the drain pipe 20, and is discharged from the steam pipe 3 from the drain pipe 20, avoiding the temperature control imbalance caused by the presence of a large amount of accumulated water. The combination of the steam trap 21 and the second check valve 22 can prevent steam from being discharged from the drain pipe 20, and can also prevent the reverse flow of accumulated water.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A low-flow temperature and pressure reduction device, comprising an air inlet pipe (1), a pressure reducing valve (2), a steam pipe (3) and a temperature-reducing water nozzle (4), characterized in that: One end of the air inlet pipe (1) is connected to a pressure reducing valve (2) via a flange, and the output end of the pressure reducing valve (2) is connected to a steam pipe (3) via a flange. A cooling water nozzle (4) is installed through the top of the steam pipe (3). A fixing seat (8) is installed on the front end outer surface of the steam pipe (3), and the top of the fixing seat (8) is installed through the cooling water nozzle (4). A noise reduction component is provided inside the fixing seat (8), and the noise reduction component is used to reduce the noise generated during the process of cooling and reducing the pressure of steam. The noise reduction component comprises a sound insulation tube (9), sound-absorbing cotton (10) and an annular cavity (11); the sound insulation tube (9) is fixedly installed on the inner side of the fixing seat (8), and the sound insulation tube (9) is made of a hard sound insulation material; the inner wall of the sound insulation tube (9) is fixedly installed with sound-absorbing cotton (10); the annular cavity (11) is provided on the inner side of the sound-absorbing cotton (10) of the sound insulation tube (9) and the outer side of the steam pipe (3).

2. A low-flow temperature and pressure reduction device according to claim 1, characterized in that: A silencer plate (7) is embedded in the inner wall of the input end of the steam pipe (3), and the output end of the steam pipe (3) is connected to an air outlet pipe (6) via a flange.

3. A low-flow temperature and pressure reduction device according to claim 1, characterized in that: The top of the steam pipe (3) is connected to a spring safety valve (5) via a flange, and the spring safety valve (5) is located at the rear end of the desuperheating water nozzle (4), and the output end of the spring safety valve (5) is connected to an exhaust pipe (17).

4. A low-flow temperature and pressure reduction device according to claim 1, characterized in that: The input end of the desuperheating water nozzle (4) is connected to a first check valve (13), and the input end of the first check valve (13) is connected to a desuperheating water pipeline (12).

5. A low-flow temperature and pressure reduction device according to claim 4, characterized in that: The input end of the desuperheating water pipe (12) is connected to a regulating valve (14), the input end of the regulating valve (14) is connected to a stop valve (15) through a pipe and a flange, and the input end of the stop valve (15) is connected to a water inlet pipe (16).

6. The low-flow temperature and pressure reduction device according to claim 1, characterized in that: An arc-shaped partition (18) is installed on the inner wall of the rear end of the steam pipe (3), and the arc of the arc-shaped partition (18) is bent toward the bottom wall of the pipe. A fine through hole (19) is opened through the top of the arc-shaped partition (18). A drain pipe (20) is connected to the bottom of the steam pipe (3), and the drain pipe (20) and the arc-shaped partition (18) are in communication with the space formed by the bottom wall of the steam pipe (3).

7. A low-flow temperature and pressure reduction device according to claim 6, characterized in that: The output end of the drain pipe (20) is connected to a steam trap (21), and the output end of the steam trap (21) is connected to a second check valve (22) via a pipeline and a flange.

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