A steam-water separation device suitable for a steam generator

Abstract

This utility model relates to the field of steam generator technology and discloses a steam-water separation device suitable for steam generators. It includes a furnace body and evaporation tubes located in the furnace chamber inside the furnace body. A burner is located above the furnace body, a lower header is located at the bottom of the furnace body, and an upper header is located at the top of the furnace body. The upper and lower ends of the evaporation tubes are connected to the upper and lower headers, respectively. The evaporation tubes are evenly distributed along the circumferential direction at the edge of the furnace chamber, with gaps between adjacent evaporation tubes. A steam-water separation device is installed inside the evaporation tubes. By reducing the water content in the steam through the steam-water separation device, steam-water separation is achieved. On the one hand, this effectively increases the heat carried by the steam per unit mass, improves thermal energy utilization efficiency, and ensures efficient operation of steam-using equipment while reducing fuel consumption and operating costs. On the other hand, it prevents water hammer from forming when water in the steam flows in the pipes, impacting the pipes and valves and causing equipment or pipe damage.

Description

Technical Field

[0001] This utility model belongs to the field of steam generator technology, specifically relating to a steam-water separation device suitable for steam generators. Background Technology

[0002] A steam generator is a device that uses external energy (such as electricity, fuel heat energy, etc.) to heat water to its boiling point, causing it to absorb heat and undergo a phase change, thereby producing steam. Its core is to provide latent heat of vaporization through energy input to realize the energy form conversion from liquid water to steam.

[0003] Compared to traditional boilers, which have an internal water capacity greater than 30L and are classified as pressure vessels and special equipment by the state, requiring prior approval and annual external inspections, steam generators have an internal structure that limits the water capacity to less than 30L. Therefore, they are not classified as pressure vessels, eliminating the need for approval and annual inspections, and pose no significant safety hazards. Furthermore, the internal design of steam generators is safer, incorporating multiple stainless steel finned evaporator tubes to distribute internal pressure while increasing heat supply.

[0004] However, in actual use, the lack of a steam-water separation device results in a high water content in the high-temperature steam. On the one hand, the high water content reduces the heat carried by the steam, requiring users to consume more steam in heating, drying, and other processes, directly increasing fuel consumption and operating costs. On the other hand, the moisture in the steam can easily form water hammer when flowing in pipelines, impacting pipes and valves, causing equipment damage or pipeline rupture. In addition, moisture can affect the efficiency of steam-driven equipment (such as steam turbines), leading to insufficient equipment output and affecting production progress.

[0005] As can be seen from the above, high steam moisture content not only directly affects users' energy efficiency and production costs, but may also cause indirect losses through equipment damage, product quality problems, and environmental violations. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a steam-water separation device suitable for steam generators, so as to solve the technical problem in the prior art that the high water content in high-temperature steam reduces the heat carried by the steam, resulting in increased fuel consumption and operating costs.

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

[0008] A steam-water separation device suitable for a steam generator includes a furnace body and evaporation tubes located in the furnace chamber inside the furnace body. A burner is provided above the furnace body, a lower header is provided at the bottom of the furnace body, and an upper header is provided at the top of the furnace body. The upper and lower ends of the evaporation tubes are connected to the upper header and the lower header, respectively. The evaporation tubes are evenly distributed along the circumferential direction at the edge of the furnace chamber, with a gap between adjacent evaporation tubes. A steam-water separation device is provided inside the evaporation tubes to reduce the water content in the steam. The steam-water separation device includes a screw of the same length as the evaporation tubes. The upper part of the screw protrudes above the softened water surface inside the evaporation tubes. The screw includes a shaft and spiral blades that extend vertically around the outer surface of the shaft, forming a spiral steam passage through the spiral blades.

[0009] Furthermore, the evaporator has two layers, an inner layer and an outer layer. The inner and outer layers of the evaporator are spaced apart to form a double-layer concentric ring structure, with the gaps between the outer and inner layers being opposite.

[0010] Furthermore, the evaporator extends vertically, and a sealing plate is provided at the top opening of the evaporator. The screw is fixedly connected to the bottom surface of the sealing plate, and the axis of the screw body coincides with the axis of the evaporator. Multiple vent holes are opened on the sealing plate along the circumferential direction. The vent holes are opposite to the spiral blades, and the steam enters the upper header through the vent holes.

[0011] Furthermore, the furnace body includes a cylindrical sidewall and a top plate and a bottom plate located at the upper and lower ends of the sidewall. The three together form a cylindrical structure, and the internal space of the furnace body is the furnace chamber.

[0012] Furthermore, the lower manifold includes an annular lower manifold bottom plate located below the bottom plate. Between the lower manifold bottom plate and the bottom plate, cylindrical lower manifold inner supports and lower manifold outer supports are provided from the inside to the outside. The lower manifold inner supports and lower manifold outer supports are both located at the edge of the bottom plate. The lower manifold is formed by the lower manifold bottom plate, lower manifold inner supports, lower manifold outer supports, and enclosing each other. The internal space of the lower manifold is used for water storage.

[0013] Furthermore, the upper header includes an upper header cover plate located above the top plate. The upper header cover plate is annular. Between the upper header cover plate and the top plate, there are cylindrical upper header inner supports and upper header outer supports arranged from the inside to the outside. The upper header inner supports and upper header outer supports are both located at the edge of the top plate. The upper header is formed by the upper header cover plate, upper header inner supports, upper header outer supports and the top plate. The internal space of the upper header is used to contain steam.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) Compared with the prior art, by setting up a steam-water separation device, the water content in the steam is greatly reduced, and steam-water separation is achieved. On the one hand, it can effectively increase the heat carried by the steam per unit mass, improve the thermal energy utilization efficiency, and ensure the efficient operation of steam-using equipment while reducing fuel consumption and operating costs. On the other hand, it avoids the formation of water hammer when the water in the steam flows in the pipe, which impacts the pipe and valve, causing equipment damage or pipe damage. Moreover, the falling tiny water droplets can be collected, which reduces the supply of softened water in the evaporator tube to a certain extent, effectively saving energy and water resources. Furthermore, by embedding the steam-water separation device in the evaporator tube, space can be effectively saved and the overall structure of the evaporator can be improved.

[0016] (2) By placing the burner above the furnace body, on the one hand, the height and volume of the entire steam generator can be reduced, making the structure more compact and optimizing space occupation; on the other hand, during transportation, the burner can be disassembled and separated from the furnace body, which can effectively eliminate internal gaps, greatly compress the overall transportation volume, and adapt to complex transportation scenarios.

[0017] (3) Through the setting of the energy-saving device, the high-temperature flue gas flows into the box through the connection port and preheats the softened water in the coil. On the one hand, the waste heat of the flue gas can be reused, and the preheated softened water can be heated up quickly, thus effectively saving resources. On the other hand, the flue gas temperature is reduced, which can meet the emission standards without additional treatment, simplifying the production process and improving production efficiency. In addition, under the action of the baffle, the path of the high-temperature flue gas is extended, thereby increasing the contact time between the high-temperature flue gas and the coil, which further improves the preheating effect of the softened water and the cooling effect of the flue gas. Attached Figure Description

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0019] Figure 1 This is an overall schematic diagram of the steam-water separation device applicable to a steam generator in Embodiment 1 of this utility model;

[0020] Figure 2 This is a cross-sectional view of the steam-water separation device applicable to a steam generator in Embodiment 1 of this utility model;

[0021] Figure 3 for Figure 2 Enlarged view at point A1;

[0022] Figure 4 for Figure 3 Enlarged view at point A2;

[0023] Figure 5 for Figure 3Enlarged view of section A3 in the middle.

[0024] The following labels are shown in the attached diagram:

[0025] Furnace body 1, furnace chamber 101, burner 102, burner head 103, lower header 104, lower header bottom plate 105, lower header internal support 106, lower header external support 107, upper header 108, upper header cover plate 109, upper header internal support 110, upper header external support 111, evaporator pipe 112, top plate 113, bottom plate 114, side wall 115, steam-water separator 2, screw 201, rod body 202, spiral blade 203, sealing plate 204, vent hole 205, economizer 3, housing 301, smoke outlet channel 302, coil 303, baffle 304. Detailed Implementation

[0026] Example 1, specifically as follows: Figures 1-5 As shown.

[0027] A steam-water separation device suitable for a steam generator includes a furnace body 1 and an evaporation tube 112 located in the furnace chamber 101 inside the furnace body 1. The evaporation tube 112 extends vertically and is filled with softened water. A steam-water separation device 2 is provided inside the evaporation tube 112 to reduce the water content in the steam.

[0028] like Figure 1 As shown, the furnace body 1 includes a cylindrical side wall 115 and a top plate 113 and a bottom plate 114 located at the upper and lower ends of the side wall 115. The three together form a cylindrical structure. The internal space of the furnace body 1 is the furnace chamber 101. In this embodiment, the furnace body top plate 113 and the furnace body bottom plate 114 are both perforated plates.

[0029] like Figures 2-5 As shown, the bottom of the furnace body 1 is provided with a lower header 104, and the top of the furnace body 1 is provided with an upper header 108. Specifically, the lower header 104 includes an annular lower header bottom plate 105 located below the bottom plate 114. Between the lower header bottom plate 105 and the bottom plate 114, there are cylindrical lower header inner supports 106 and lower header outer supports 107 arranged from the inside to the outside. The lower header inner supports 106 and lower header outer supports 107 are both located at the edge of the bottom plate 114. It should be further explained that the outer wall of the lower header inner support 106 contacts the inner ring of the lower header bottom plate 105, and the lower header inner support 106 extends vertically to the bottom of the lower header bottom plate 105. In addition, the connection between the lower header inner support 106 and the bottom plate 114 and the lower header bottom plate 105, as well as the connection between the lower header outer support 107 and the bottom plate 114 and the lower header bottom plate 105, are all fixed by welding.

[0030] The lower header 104 is formed by the lower header bottom plate 105, the lower header inner support 106, the lower header outer support 107 and the bottom plate 114. The internal space of the lower header 104 is used for water storage.

[0031] The upper header 108 includes an upper header cover 109 located above the top plate 113. The upper header cover 109 is annular, with a connecting channel formed at its inner ring. Cylindrical upper header inner supports 110 and outer supports 111 are spaced apart from the top plate 113 from the inside out. Both the upper header inner supports 110 and outer supports 111 are located at the edge of the top plate 113. It should be further noted that the outer wall of the upper header inner support 110 contacts the inner ring of the upper header cover 109, and the upper header inner support 110 extends vertically above the upper header cover 109. The upper header 108 is formed by the upper header cover 109, the upper header inner support 110, the upper header outer support 111, and the top plate 113. The internal space of the upper header 108 is used to contain steam.

[0032] Evaporation tubes 112 are evenly distributed along the circumferential direction at the edge of the furnace 101, with gaps between adjacent evaporation tubes 112. It is worth noting that in this embodiment, the evaporation tubes 112 have two layers, an inner and an outer layer. The inner and outer evaporation tubes are spaced apart to form a double-layer concentric ring structure, with the gaps between the outer and inner evaporation tubes being opposite.

[0033] The upper and lower ends of the evaporator tube 112 are connected to the upper header 108 and the lower header 104, respectively. Specifically, the top plate 113 and the bottom plate 114 have corresponding connection holes, and the two ends of the evaporator tube 112 are inserted into the upper and lower connection holes, respectively. The connection between the evaporator tube 112 and the top plate 113 and the bottom plate 114 is welded and fixed. Softened water in the lower header 104 is injected into the evaporator tube 112 through a water pump or other pressurization device, so that the softened water level in the evaporator tube 112 is maintained at a certain height, and a gap is left between the softened water level and the top opening of the evaporator tube 112.

[0034] The bottom of the lower header 104 is connected to a water inlet pipe (not shown in the figure), through which softened water is supplied to the lower header 104. The top of the upper header 108 is connected to a main steam pipe (not shown in the figure), through which steam is transported to steam-using equipment (such as steam turbine).

[0035] A burner 102 is also installed above the furnace body 1. The burner 102 is fixed to the furnace body 1 by a flange connection. A connecting through hole is opened at the center of the top plate 113. The burner head 103 of the burner 102 passes through the connecting channel in the middle of the upper header cover plate 109 and the connecting through hole in the middle of the top plate 113 and enters the furnace chamber 101. The high-temperature flame generated by the burner head 103 heats the surrounding evaporation tubes 112. The burner 102 and the burner head 103 are both existing technologies and will not be described in detail here.

[0036] By placing the burner 102 above the furnace body 1, on the one hand, the height and volume of the entire steam generator can be reduced, making the structure more compact and optimizing space occupation; on the other hand, during transportation, the burner 102 can be disassembled and separated from the furnace body 1, which can effectively eliminate internal gaps, greatly compress the overall transportation volume, and adapt to complex transportation scenarios.

[0037] To reduce the water content in the steam, a steam-water separation device 2 is provided inside the evaporator tube 112. The steam-water separation device 2 includes a screw 201 of the same length as the evaporator tube 112. The upper part of the screw 201 protrudes above the softened water surface inside the evaporator tube 112. The screw 201 includes a cylindrical rod body 202 and spiral blades 202 extending vertically around the outer surface of the rod body 202, forming a spiral steam passage. A sealing plate 204 is welded to the top opening of the evaporator tube 112, and the screw 201 is also welded and fixed to the bottom surface of the sealing plate 204. It should be noted in detail that in this embodiment, the axis of the rod body 202 coincides with the axis of the evaporator tube 112. Multiple vent holes 205 are opened on the sealing plate 204 along the circumferential direction. The vent holes 205 are opposite to the spiral blades 202, and the steam enters the upper header 108 through the vent holes 205.

[0038] In operation, the burner head 103 first heats the evaporator tube 112 inside the furnace 101. The softened water in the evaporator tube 112 evaporates to form steam. At this point, the steam has a high water content. The steam rises and enters the spiral steam passage, rotating at high speed along the spiral passage. Under the influence of gravity and centrifugal force, the tiny water droplets in the steam detach from the steam and fall back into the evaporator tube 112, significantly reducing the water content in the steam and achieving steam-water separation. On the one hand, this effectively increases the heat carried by the steam per unit mass, improves thermal energy utilization efficiency, and ensures efficient operation of steam-using equipment while reducing fuel consumption and operating costs. On the other hand, it prevents water hammer from forming when the steam flows in the pipes, impacting the pipes and valves and causing equipment or pipe damage. Moreover, the falling tiny water droplets are collected, reducing the supply of softened water in the evaporator tube to a certain extent, effectively saving energy and water resources. Furthermore, by integrating the steam-water separation device 2 into the evaporator tube 112, space is effectively saved, and the overall structure of the evaporator is improved.

[0039] An energy-saving device 3 is also installed on one side of the furnace body 1, such as Figure 2 As shown, the energy-saving device 3 includes a housing 301 connected to the furnace body 1. Specifically, both the bottom of the side wall of the furnace body 1 and the bottom of the side wall of the housing 301 have connection ports, which are connected by pipes. The housing 301 contains a layered coil 303 that is continuously folded in the horizontal plane and extends vertically. The water outlet of the coil 303 is connected to the middle manifold (not shown in the figure), and the preheated softened water flows from the middle manifold to the lower manifold.

[0040] The bottom of the side wall of the housing 301 is also provided with a smoke exhaust channel 302. In this embodiment, the smoke exhaust channel 302 is directly opposite the connection port at the top of the housing 301. A baffle 304 is provided in the middle between the connection port at the bottom of the housing 301 and the smoke exhaust channel 302. The baffle 304 is welded to the bottom plate and side wall of the housing 301 and extends vertically upward. There is a gap between the baffle 304 and the top plate of the housing 301, and a smoke passage is formed at this gap.

[0041] With the energy-saving device 3 in place, high-temperature flue gas flows into the housing 301 through the connection port and preheats the softened water in the coil 303. On the one hand, the waste heat of the flue gas can be reused, and the preheated softened water can be heated up quickly, thus effectively saving resources; on the other hand, the flue gas temperature is reduced, meeting emission standards without additional treatment, simplifying the production process and improving production efficiency. In addition, the baffle 304 extends the path of the high-temperature flue gas, thereby increasing the contact time between the high-temperature flue gas and the coil 303, further improving the preheating effect of the softened water and the cooling effect of the flue gas.

[0042] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A steam-water separation device suitable for steam generators, characterized in that, The furnace includes a furnace body and evaporation tubes located in the furnace chamber inside the furnace body. A burner is located above the furnace body, a lower header is located at the bottom of the furnace body, and an upper header is located at the top of the furnace body. The upper and lower ends of the evaporation tubes are connected to the upper header and the lower header, respectively. The evaporation tubes are evenly distributed along the circumferential direction at the edge of the furnace chamber, with gaps between adjacent evaporation tubes. A steam-water separation device is installed inside the evaporation tubes to reduce the water content in the steam. The steam-water separation device includes a screw of the same length as the evaporation tubes. The upper part of the screw protrudes above the softened water surface inside the evaporation tubes. The screw includes a shaft and spiral blades that extend vertically around the outer surface of the shaft, forming a spiral steam passage through the spiral blades.

2. The steam-water separation device suitable for a steam generator according to claim 1, characterized in that, The evaporator has two layers, an inner and an outer layer. The inner and outer evaporator layers are spaced apart to form a double-layer concentric ring structure, with the gaps between the outer and inner evaporator layers being opposite.

3. The steam-water separation device suitable for a steam generator according to claim 2, characterized in that, The evaporator tube extends vertically, and a sealing plate is provided at the top opening of the evaporator tube. The screw is fixedly connected to the bottom surface of the sealing plate, and the axis of the screw body coincides with the axis of the evaporator tube. Multiple vent holes are opened along the circumference of the sealing plate, and the vent holes are opposite to the spiral blades. Steam enters the upper header through the vent holes.

4. The steam-water separation device suitable for a steam generator according to claim 1, characterized in that, The furnace body includes a cylindrical sidewall and a top plate and a bottom plate located at the upper and lower ends of the sidewall. The three together form a cylindrical structure, and the internal space of the furnace body is the furnace chamber.

5. The steam-water separation device suitable for a steam generator according to claim 4, characterized in that, The lower manifold includes an annular lower manifold bottom plate located below the base plate. Between the lower manifold bottom plate and the base plate, there are cylindrical lower manifold inner supports and lower manifold outer supports spaced from the inside to the outside. The lower manifold inner supports and lower manifold outer supports are both located at the edge of the base plate. The lower manifold is formed by the lower manifold bottom plate, lower manifold inner supports, lower manifold outer supports and enclosing each other. The internal space of the lower manifold is used for water storage.

6. The steam-water separation device suitable for a steam generator according to claim 5, characterized in that, The upper header includes an upper header cover plate located above the top plate. The upper header cover plate is annular. Between the upper header cover plate and the top plate, there are cylindrical upper header inner supports and upper header outer supports arranged from the inside to the outside. The upper header inner supports and upper header outer supports are both located at the edge of the top plate. The upper header is formed by the upper header cover plate, upper header inner supports, upper header outer supports and the top plate. The internal space of the upper header is used to contain steam.

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