Efficient superheated steam silencing heater with shallow liquid level

Abstract

The utility model relates to an efficient shallow-liquid-level superheated steam silencing heater, and belongs to the technical field of heaters, the efficient shallow-liquid-level superheated steam silencing heater comprises a water tank and two heating mechanisms oppositely arranged in the water tank, each heating mechanism comprises a coiled pipe and a sleeve assembly communicated with the output end of the coiled pipe, the input end of each coiled pipe is communicated with a steam inlet pipe, and the input end of each coiled pipe is communicated with a steam outlet pipe; a plurality of outer spraying holes are formed in the sleeve assemblies, and the outer spraying holes in the two sleeve assemblies are oppositely formed. The superheated steam is firstly converted into the saturated steam in the closed coiled pipe, the situation that the superheated steam escapes is avoided, and meanwhile preheating is conducted; and after being converted into saturated steam, the steam is sprayed out through the outer spraying holes for secondary heating. Compared with direct contact heat exchange between superheated steam and water, the heat exchange coefficient is increased, the heat exchange efficiency is higher, and the heating efficiency is improved; the volume of the generated steam mass is smaller, and vibration and noise generated during fracture are weakened; and the steam escape phenomenon is effectively reduced, and the heat energy loss is reduced.

Description

Technical Field

[0001] The present application relates to the field of heaters, and in particular to a high-efficiency shallow liquid level superheated steam silencer heater. Background Art

[0002] Traditional steam-water mixing heaters are placed in water after drilling holes in steel pipes. Not only are they noisy, but when using superheated steam, there is steam escape in shallow liquid level water tanks, resulting in energy waste. Since the convection heat transfer coefficient of superheated steam is 100-200W / ㎡℃, and the condensation heat transfer coefficient of saturated steam is 20000-30000W / ㎡℃, superheated steam first forms a "steam mass" when it is discharged from the outlet of the discharge pipe. When the steam in the initial steam mass is in an overheated state, the thermal conductivity is low and the heat release rate to the heated liquid is slow. As the steam mass is discharged, the atmospheric steam mass is divided into several small steam masses by the water flow, and the temperature is reduced to form a saturated steam mass, which is absorbed by water and becomes condensed water, releasing the latent heat of vaporization; the rupture of the steam mass produces strong vibration and noise, and another part of the larger steam mass moves upward in the heated liquid and escapes from the liquid surface, resulting in a waste of steam energy. Utility Model Content

[0003] In order to improve heating efficiency and reduce heat energy loss, the present application provides a high-efficiency shallow liquid level superheated steam silencer heater.

[0004] The present application provides a high-efficiency shallow liquid level superheated steam silencing heater, which adopts the following technical solution:

[0005] A high-efficiency shallow liquid level superheated steam silencer heater comprises a water tank and two heating mechanisms arranged oppositely in the water tank, the heating mechanism comprises a serpentine tube and a sleeve assembly connected to the output end of the serpentine tube, the input end of the serpentine tube is connected to a steam inlet pipe, a plurality of external spray holes are arranged on the sleeve assembly, and the external spray holes on the two sleeve assemblies are arranged oppositely.

[0006] By adopting the above technical solution, after the superheated steam enters the water tank through the steam inlet pipe, it first passes through the serpentine pipe, and exchanges heat with the water in the water tank through the serpentine pipe, so that the water in the water tank is preheated. At the same time, the steam temperature in the serpentine pipe drops, and the superheated steam is gradually converted into saturated steam. Then the saturated steam enters the sleeve assembly and is ejected through the outer spray hole. The ejected saturated steam is fully in contact with the water, thereby achieving full heat exchange between the saturated steam and the water, and the water in the water tank is heated twice. By first converting the superheated steam into saturated steam in a closed serpentine pipe, the escape of superheated steam is avoided, and the heat released during the conversion process is heated for the first time; after being converted into saturated steam, it is ejected through the outer spray hole, thereby heating the water twice. Compared with the direct contact heat exchange between superheated steam and water, the heat transfer coefficient is significantly improved, the heat transfer efficiency is higher, and the heating efficiency is improved; the volume of the generated steam group is smaller, and the vibration and noise generated during the rupture are reduced; and the steam escape phenomenon is effectively reduced, and the heat energy loss is reduced.

[0007] Optionally, the sleeve assembly includes an inner tube, an intermediate tube and an outer tube which are nested in sequence from the inside to the outside, the two ends of the inner tube, the intermediate tube and the outer tube are closed, the input end of the inner tube is connected to the output end of the serpentine tube, the inner tube is provided with an inner spray hole, the intermediate tube is provided with an intermediate spray hole, and the outer spray hole is provided on the outer tube.

[0008] By adopting the above technical scheme, through the nested sleeve components, the steam passes through the inner tube, the middle tube and the outer tube in sequence. On the one hand, the steam is fully and evenly mixed in the sleeve component, ensuring that the heater is heated stably and evenly; on the other hand, through the blocking of the tube walls of the inner tube, the middle tube and the outer tube, the steam can only be released into the water tank through the inner spray hole, the middle spray hole and the outer spray hole in sequence, which is beneficial to prolonging the heat exchange time of the steam in the sleeve component and further ensuring sufficient heat exchange between steam and water.

[0009] Optionally, the inner spray holes are provided in plurality and are symmetrically arranged on the left and right sides of the embedded tube, the middle spray holes are provided in plurality and are symmetrically arranged on the upper and lower sides of the embedded tube, and the positions of the outer spray holes on the outer sleeve correspond to the positions of the inner spray holes on the corresponding embedded tube away from the inner wall of the adjacent water tank.

[0010] By adopting the above technical solution, the opening orientation of the middle spray hole and the inner spray hole is 90°, and the opening orientation of the outer spray hole and the middle spray hole is 90°, which effectively extends the flow path of steam in the casing assembly and ensures the adequacy of heat exchange between steam and water. Secondly, the outer spray hole is only set on the side away from the inner wall of the adjacent water tank, which reduces the erosion of the water tank side wall caused by steam and ensures that the water inside the outer spray hole can be fully disturbed to ensure the uniformity of heat exchange.

[0011] Optionally, the inner spray holes on the same side of the embedded tube are arranged at equal distances, the middle spray holes on the same side of the middle tube are arranged at equal distances, the distance between two adjacent middle spray holes on the same side is equal to the distance between two adjacent inner spray holes on the same side, and the inner spray holes and the middle spray holes are staggered with each other.

[0012] By adopting the above technical solution, it is further ensured that the steam has a longer flow path from the embedded tube to the intermediate tube and from the intermediate tube to the outer tube, thereby ensuring the adequacy of the heat exchange between steam and water.

[0013] Optionally, the center of the interval between adjacent inner spray holes is arranged corresponding to the hole center of the middle spray hole.

[0014] By adopting the above technical solution, the misalignment degree between the inner spray hole and the middle spray hole is "maximized", thereby ensuring the retention and heat exchange time of steam in the casing assembly.

[0015] Optionally, the two steam inlet pipes are connected in parallel to a main control pipe, and a regulating valve is provided on the main control pipe.

[0016] By adopting the above technical solution, the opening of the regulating valve can be adjusted to adjust the steam flow rate entering the steam inlet pipe, thereby adjusting the heating efficiency.

[0017] Optionally, the regulating valve is connected in parallel with a bypass pipe, and the bypass pipe is provided with a temperature-controlled opening and closing valve.

[0018] By adopting the above technical solution, when the temperature of the heated water in the water tank is higher than the set value of the temperature control on-off valve, the temperature control on-off valve is closed to reduce the input steam flow and avoid excessive steam input at high temperature to generate heat energy waste; when the temperature of the heated water in the water tank is lower than the set value of the temperature control on-off valve, the temperature control on-off valve is opened to ensure sufficient steam input at a lower temperature. In addition, by adding a temperature control on-off valve to the bypass of the regulating valve, the water in the water tank can be heated quickly and the heating time can be shortened.

[0019] Optionally, the aperture of the inner spray hole is gradually widened along the steam flow direction in the embedded tube.

[0020] By adopting the above technical scheme, affected by the fluid resistance, the steam ejected from the inner spray hole close to the input end of the embedded tube encounters less resistance, while the steam ejected from the inner spray hole far from the input end of the embedded tube encounters greater resistance. By expanding the aperture of the inner hole, the phenomenon that the power at the far end of the embedded tube is insufficient compared to the near end is compensated, thereby further ensuring the uniformity of steam output at various parts of the sleeve assembly, thereby ensuring the uniformity of heating of the heater.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. Through the arrangement of the serpentine and sleeve assembly, after the superheated steam enters the water tank through the steam inlet pipe, it first passes through the serpentine and exchanges heat with the water in the water tank through the serpentine, so that the water in the water tank is preheated. At the same time, the steam temperature in the serpentine drops, and the superheated steam is gradually converted into saturated steam. Then the saturated steam enters the sleeve assembly and is ejected through the outer spray hole. The ejected saturated steam is fully in contact with the water, thereby achieving full heat exchange between the saturated steam and the water, and the water in the water tank is heated for the second time. By first converting the superheated steam into saturated steam in the closed serpentine, the escape of superheated steam is avoided, and the heat released during the conversion process is heated for the first time; after being converted into saturated steam, it is ejected through the outer spray hole, thereby heating the water for the second time. Compared with the direct contact heat exchange between superheated steam and water, the heat transfer coefficient is significantly improved, the heat transfer efficiency is higher, and the heating efficiency is improved; the volume of the steam group generated is smaller, and the vibration and noise generated during the rupture are reduced; and the steam escape phenomenon is effectively reduced, and the heat energy loss is reduced.

[0023] 2. Through the nested layers of embedded tubes, intermediate tubes and outer tubes, on the one hand, the steam is fully and evenly mixed in the tube assembly, ensuring that the heater is heated stably and evenly; on the other hand, through the tube wall blocking of the embedded tube, intermediate tube and outer tube, the steam can only be released into the water tank through the inner spray hole, the middle spray hole and the outer spray hole in sequence, which is conducive to extending the heat exchange time of the steam in the tube assembly and further ensuring sufficient heat exchange between steam and water.

[0024] 3. Through the arrangement of the inner spray hole, the middle spray hole and the outer spray hole, the opening position of the middle spray hole and the inner spray hole is 90°, and the opening position of the outer spray hole and the middle spray hole is 90°, which effectively extends the flow path of the steam in the casing assembly and ensures the adequacy of the heat exchange between steam and water. Secondly, the outer spray hole is only arranged on the side away from the inner wall of the adjacent water tank, which reduces the erosion of the water tank side wall caused by steam and ensures that the water inside the outer spray hole can be fully disturbed to ensure the uniformity of heat exchange. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0026] Figure 2 It is a radial cross-sectional view of the sleeve assembly in the first embodiment of the present application.

[0027] Figure 3 It is an axial cross-sectional view of the sleeve assembly in the first embodiment of the present application.

[0028] Figure 4 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0029] Explanation of the reference numerals: 1. water tank; 2. heating mechanism; 21. serpentine pipe; 22. sleeve assembly; 221. embedded pipe; 2211. inner spray hole; 222. intermediate pipe; 2221. intermediate spray hole; 223. outer sleeve; 2231. outer spray hole; 3. steam inlet pipe; 4. main control pipe; 41. regulating valve; 42. bypass pipe; 421. temperature control opening and closing valve. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 , further details of this application are given.

[0031] Embodiment 1:

[0032] The first embodiment of the present application discloses a high-efficiency shallow liquid level superheated steam silencing heater. Figure 1-2 A high-efficiency shallow liquid level superheated steam muffler heater comprises a water tank 1 and two heating mechanisms 2 arranged oppositely in the water tank 1. The heating mechanism 2 comprises a serpentine tube 21 and a sleeve assembly 22 fixed on the bottom wall of the water tank 1. The output end of the serpentine tube 21 is connected to the sleeve assembly 22, and the input end is connected to a steam inlet pipe 3. The sleeve assembly 22 is provided with a plurality of external spray holes 2231, and the external spray holes 2231 on the two sleeve assemblies 22 are arranged oppositely. In the first embodiment, the serpentine tube 21 is made of stainless steel.

[0033] When the heater is used, after the superheated steam enters the water tank 1 through the steam inlet pipe 3, it first passes through the serpentine pipe 21, and exchanges heat with the water in the water tank 1 through the serpentine pipe 21, so that the water in the water tank 1 is preheated. At the same time, the steam temperature in the serpentine pipe 21 drops, and the superheated steam is gradually converted into saturated steam. Then the saturated steam enters the sleeve assembly 22 and is ejected through the outer spray hole 2231. The ejected saturated steam is fully in contact with the water, thereby achieving sufficient heat exchange between the saturated steam and the water, and the water in the water tank 1 is heated for the second time. By first converting the superheated steam into saturated steam in the closed serpentine pipe 21, the escape of the superheated steam is avoided, and the heat released during the conversion process is heated for the first time; after being converted into saturated steam, it is ejected through the outer spray hole 2231, thereby heating the water for the second time.

[0034] Reference Figure 1, the two steam inlet pipes 3 are connected in parallel with a main control pipe 4, on which a regulating valve 41 is installed. The regulating valve 41 is connected in parallel with a bypass pipe 42, on which a temperature control opening and closing valve 421 is installed. In the first embodiment, the temperature control opening and closing valve 421 is a pneumatic temperature control opening and closing valve 421. By changing the opening of the regulating valve 41, the steam flow entering the steam inlet pipe 3 can be adjusted, and then the heating efficiency can be adjusted. When the temperature of the heated water in the water tank 1 is higher than the set value of the temperature control opening and closing valve 421, the temperature control opening and closing valve 421 is closed, reducing the input steam flow, avoiding excessive steam input at high temperature and generating heat energy waste; when the temperature of the heated water in the water tank 1 is lower than the set value of the temperature control opening and closing valve 421, the temperature control opening and closing valve 421 is opened to ensure sufficient steam input at a lower temperature. In addition, by adding a temperature control opening and closing valve 421 to the bypass of the regulating valve 41, the water in the water tank 1 can be quickly heated up and its heating time can be shortened.

[0035] Reference Figure 2-3 The sleeve assembly 22 includes an inner tube 221, an intermediate tube 222 and an outer sleeve 223 which are nested from the inside to the outside. Both ends of the inner tube 221, the intermediate tube 222 and the outer sleeve 223 are closed. The input end of the inner tube 221 is connected to the output end of the serpentine tube 21. The inner tube 221 is provided with an inner spray hole 2211, the intermediate tube 222 is provided with an intermediate spray hole 2221, and the outer spray hole 2231 is provided on the outer sleeve 223. In the first embodiment, the inner tube 221, the intermediate tube 222 and the outer sleeve 223 are all made of stainless steel. Through the nested sleeve assembly 22, the steam passes through the inner tube 221, the middle tube 222 and the outer sleeve 223 in sequence. On the one hand, the steam is fully and evenly mixed in the sleeve assembly 22, ensuring that the heater is heated stably and evenly; on the other hand, through the pipe wall blocking of the inner tube 221, the middle tube 222 and the outer sleeve 223, the steam can only be released into the water tank 1 through the inner spray hole 2211, the middle spray hole 2221 and the outer spray hole 2231 in sequence, which is beneficial to prolonging the heat exchange time of the steam in the sleeve assembly 22, and further ensuring sufficient heat exchange between steam and water.

[0036] Reference Figure 1-3, there are multiple inner spray holes 2211 and they are symmetrically arranged on the left and right sides of the inner tube 221, there are multiple middle spray holes 2221 and they are symmetrically arranged on the upper and lower sides of the inner tube 221, and the position of the outer spray hole 2231 on the outer sleeve 223 is arranged corresponding to the position of the inner spray hole 2211 on the corresponding inner tube 221 away from the inner side wall of the adjacent water tank 1. In this way, the opening orientation of the middle spray hole 2221 and the inner spray hole 2211 is 90°, and the opening orientation of the outer spray hole 2231 and the middle spray hole 2221 is 90°, which effectively extends the flow path of steam in the sleeve assembly 22 and ensures the adequacy of heat exchange between steam and water. Secondly, the outer spray hole 2231 is only arranged on the side away from the inner side wall of the adjacent water tank 1, which reduces the erosion of the side wall of the water tank 1 caused by steam, and ensures that the water inside the outer spray hole 2231 can be fully disturbed to ensure the uniformity of heat exchange.

[0037] Reference Figure 2-4 In order to further ensure that the steam has a longer flow path from the embedded tube 221 to the intermediate tube 222 and from the intermediate tube 222 to the outer tube 223, thereby ensuring sufficient heat exchange between steam and water, the embedded tubes 221 on the same side of the embedded tube 221 are arranged at equal distances, and the intermediate spray holes 2221 on the same side of the intermediate tube 222 are arranged at equal distances, and the distance between two adjacent intermediate spray holes 2221 on the same side is equal to the distance between two adjacent inner spray holes 2211 on the same side, and the inner spray holes 2211 and the intermediate spray holes 2221 are staggered with each other.

[0038] Reference Figure 3-4 The center of the spacing between adjacent inner spray holes 2211 is set corresponding to the center of the middle spray hole 2221, so that the misalignment degree between the inner spray holes 2211 and the middle spray holes 2221 can be "maximized", thereby ensuring the retention heat exchange time of steam in the sleeve assembly 22.

[0039] The implementation principle of the first embodiment of the present application is as follows: when the heater is used, after the superheated steam enters the water tank 1 through the steam inlet pipe 3, it first passes through the serpentine pipe 21, and exchanges heat with the water in the water tank 1 through the serpentine pipe 21, so that the water in the water tank 1 is preheated, and at the same time, the steam temperature in the serpentine pipe 21 drops, and the superheated steam is gradually converted into saturated steam, and then the saturated steam enters the sleeve assembly 22, and is ejected through the outer spray hole 2231, and the ejected saturated steam is fully in contact with the water, thereby achieving sufficient heat exchange between the saturated steam and the water, and the water in the water tank 1 is heated for the second time. By first converting the superheated steam into saturated steam in the closed serpentine pipe 21, the escape of superheated steam is avoided, and the heat released during the conversion process is heated for the first time; after being converted into saturated steam, it is ejected through the outer spray hole 2231, thereby heating the water for the second time.

[0040] In the first embodiment of the present application, the sleeve assembly 22 is nested layer by layer, so that the steam passes through the inner tube 221, the middle tube 222 and the outer sleeve 223 in sequence. On the one hand, the steam is fully and evenly mixed in the sleeve assembly 22, ensuring that the heater is heated stably and evenly; on the other hand, the steam is blocked by the tube walls of the inner tube 221, the middle tube 222 and the outer sleeve 223, so that the steam can only be released into the water tank 1 through the inner spray hole 2211, the middle spray hole 2221 and the outer spray hole 2231 in sequence, which is beneficial to prolonging the heat exchange time of the steam in the sleeve assembly 22, and further ensuring sufficient heat exchange between steam and water.

[0041] Compared with the heat exchange between superheated steam and water directly, the heat transfer coefficient is significantly improved, the heat transfer efficiency is higher, and the heating efficiency is improved; the volume of the steam cluster is smaller, which reduces the vibration and noise generated during the rupture; and the steam escape phenomenon is effectively reduced, reducing the heat energy loss.

[0042] Embodiment 2:

[0043] The second embodiment of the present application discloses a high-efficiency shallow liquid level superheated steam silencing heater. Figure 4 The difference between the second embodiment and the first embodiment is that the aperture of the inner spray hole 2211 is gradually widened along the steam flow direction in the inner tube 221. The reason for such a setting is that, affected by the fluid resistance, the resistance of the steam sprayed out of the inner spray hole 2211 close to the input end of the inner tube 221 is small, and the resistance of the steam sprayed out of the inner spray hole 2211 far from the input end of the inner tube 221 is large. By expanding the aperture of the inner tube 221, the phenomenon that the power at the far end of the inner tube 221 is insufficient compared with the near end is compensated, and the uniformity of the steam output at various places of the sleeve assembly 22 is further ensured, thereby ensuring the uniformity of the heating of the heater.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency shallow liquid level superheated steam silencing heater, characterized by: The invention comprises a water tank (1) and two heating mechanisms (2) arranged opposite to each other in the water tank (1), wherein the heating mechanism (2) comprises a serpentine tube (21) and a sleeve assembly (22) connected to the output end of the serpentine tube (21), the input end of the serpentine tube (21) is connected to a steam inlet pipe (3), a plurality of external spray holes (2231) are provided on the sleeve assembly (22), and the external spray holes (2231) on the two sleeve assemblies (22) are arranged opposite to each other.

2. According to claim 1, a high-efficiency shallow liquid level superheated steam silencing heater is characterized by: The sleeve assembly (22) comprises an inner tube (221), an intermediate tube (222) and an outer tube (223) which are nested in sequence from the inside to the outside; both ends of the inner tube (221), the intermediate tube (222) and the outer tube (223) are closed; the input end of the inner tube (221) is connected to the output end of the serpentine tube (21); the inner tube (221) is provided with an inner spray hole (2211); the intermediate tube (222) is provided with an intermediate spray hole (2221); and the outer spray hole (2231) is provided on the outer tube (223).

3. A high-efficiency shallow liquid level superheated steam silencing heater according to claim 2, characterized in that: The inner spray holes (2211) are provided in plurality and are symmetrically arranged on the left and right sides of the embedded tube (221); the middle spray holes (2221) are provided in plurality and are symmetrically arranged on the upper and lower sides of the embedded tube (221); the positions of the outer spray holes (2231) on the outer sleeve (223) are arranged correspondingly to the positions of the inner spray holes (2211) on the side of the corresponding embedded tube (221) away from the inner wall of the adjacent water tank (1).

4. A high-efficiency shallow liquid level superheated steam silencing heater according to claim 3, characterized in that: The inner spray holes (2211) on the same side of the embedded tube (221) are arranged at equal intervals, and the middle spray holes (2221) on the same side of the middle tube (222) are arranged at equal intervals, the distance between two adjacent middle spray holes (2221) on the same side is equal to the distance between two adjacent inner spray holes (2211) on the same side, and the inner spray holes (2211) and the middle spray holes (2221) are arranged in a staggered manner.

5. The high-efficiency shallow liquid level superheated steam silencing heater according to claim 4 is characterized by: The center of the spacing between adjacent inner spray holes (2211) is arranged corresponding to the hole center of the middle spray hole (2221).

6. The high-efficiency shallow liquid level superheated steam silencing heater according to claim 1 is characterized by: The two steam inlet pipes (3) are connected in parallel to a main control pipe (4), and a regulating valve (41) is provided on the main control pipe (4).

7. The high-efficiency shallow liquid level superheated steam silencing heater according to claim 6 is characterized by: The regulating valve (41) is connected in parallel with a bypass pipe (42), and the bypass pipe (42) is provided with a temperature control opening and closing valve (421).

8. The high-efficiency shallow liquid level superheated steam silencing heater according to claim 2 is characterized by: The aperture of the inner spray hole (2211) is gradually widened along the steam flow direction in the embedded tube (221).

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