Heat exchange device for steam dryness detection

Abstract

The utility model discloses a heat exchange device for steam dryness detection, and relates to the technical field of heat energy engineering and steam dryness detection. The device comprises a shell, a heat exchange coil, a boiler water inlet, a boiler water outlet, a cooling water inlet and a cooling water outlet, the heat exchange coil pipe sequentially comprises a coil pipe outlet section, a coil pipe heat exchange section and a coil pipe inlet section from top to bottom; the heat exchange coil is arranged in the shell, the inlet section of the coil extends out of the side wall of the shell to serve as a boiler water inlet, and the outlet section of the coil extends out of the top of the shell to serve as a boiler water outlet; the cooling water inlet is formed in the top of the shell, the cooling water outlet is formed in the side wall of the shell, and the cooling water inlet and the cooling water outlet communicate with the interior of the shell. According to the utility model, the problems of large dryness result deviation caused by unstable temperature of cooled boiler water, probe failure caused by poor cooling effect and high temperature in an open cooling mode in the traditional dryness detection process are solved.

Description

Technical Field

[0001] This utility model relates to the fields of thermal energy engineering and steam dryness detection technology, specifically to a heat exchange device for steam dryness detection. Background Technology

[0002] In the field of steam dryness detection, the conductivity method is widely used because of its simple operation and low cost. Its core is to calculate the dryness by comparing the conductivity difference between boiler water and feedwater. However, in actual applications, temperature fluctuations during the cooling process can significantly affect the conductivity value, causing the dryness calculation result to deviate from the true value.

[0003] Existing cooling systems, such as natural air cooling or simple heat exchangers, experience significant temperature fluctuations in the boiler water after heat exchange, leading to severe temperature fluctuations in the probe's measurement environment and affecting the test results. For example, when the boiler water cools to an unstable state, the negative correlation between conductivity and temperature introduces additional errors. Furthermore, the probe's temperature tolerance is typically below 80°C, while the boiler water temperature at the steam generator outlet often exceeds 150°C, making direct testing prone to probe damage or calibration failure. Therefore, there is an urgent need for a highly efficient cooling device that can rapidly cool the water to the probe's tolerance range while ensuring conductivity testing is performed in an environment with minimal temperature fluctuations. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a heat exchange device for steam dryness detection, thereby solving the problem that in existing cooling systems, the large temperature fluctuation of the boiler water after heat exchange causes the conductivity detection results to deviate from the true value.

[0005] This utility model provides a heat exchange device for steam dryness detection, comprising: a shell, a heat exchange coil, a boiler water inlet, a boiler water outlet, a cooling water inlet, and a cooling water outlet; the heat exchange coil includes, from top to bottom, a coil outlet section, a coil heat exchange section, and a coil inlet section; the heat exchange coil is disposed inside the shell, the coil inlet section extends to the outside of the shell side wall as the boiler water inlet, and the coil outlet section extends to the top of the shell as the boiler water outlet; the cooling water inlet is disposed at the top of the shell, and the cooling water outlet is disposed at the side wall of the shell, and the cooling water inlet and cooling water outlet are connected to the inside of the shell.

[0006] Furthermore, the outer casing includes an outer cylinder, a top plug, and a bottom flange, with the top plug located at the top of the outer cylinder and the bottom flange located at the bottom of the outer cylinder.

[0007] Furthermore, the top of the plug is provided with a cooling water inlet pipe through hole and a boiler water outlet pipe through hole, and the outer cylinder wall is provided with a cooling water outlet pipe through hole and a boiler water inlet pipe through hole; the cooling water inlet passes through the cooling water inlet pipe through hole, and the boiler water outlet passes through the boiler water outlet pipe through hole; the cooling water outlet passes through the cooling water outlet pipe through hole, and the boiler water inlet passes through the boiler water inlet pipe through hole.

[0008] Furthermore, a bottom flange cover is provided at the bottom of the outer casing. The sealing surface between the bottom flange cover and the bottom flange is filled with a high-temperature sealing gasket, and the seal is achieved by fasteners that are evenly distributed around the fastener mounting holes.

[0009] Furthermore, an installation beam is provided on the outer wall of the outer cylinder.

[0010] This utility model has the following beneficial effects:

[0011] Excellent heat exchange effect: The heat exchange coils of this device are coiled along a preset pitch, and the heat exchange elements are more evenly distributed, resulting in a better heat exchange effect compared with the irregular layout of existing heat exchange elements; at the same time, this device adopts the counter-flow of boiler water and cooling water to further enhance the heat exchange efficiency.

[0012] Low operational risk: This device adopts a closed structure to avoid splashing of high-temperature steam, water, etc. generated during the heat exchange process, reducing the risk of burns to operators.

[0013] Long service life: The entire structure is made of austenitic stainless steel, which has excellent corrosion resistance and a longer service life.

[0014] Easy to maintain and disassemble: Quick disassembly and assembly are achieved through the detachable flange sealing assembly, which facilitates descaling and maintenance of the outer wall of the heat exchange coil. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an assembly diagram of a heat exchange device for detecting steam dryness according to the present invention;

[0017] Figure 2 This is a structural diagram of a heat exchange coil for a heat exchange device used for steam dryness detection according to the present invention.

[0018] Figure 3 This is a cross-sectional view of the outer shell structure of a heat exchange device for detecting steam dryness according to the present invention.

[0019] Illustration: 101-Outer shell; 102-Heat exchange coil; 103-Boiler water inlet; 104-Boiler water outlet; 105-Cooling water inlet; 106-Cooling water outlet; 107-Bottom flange cover; 108-High temperature gasket; 109-Fastener; 110-Mounting beam; 201-Coil outlet section; 202-Coil heat exchange section; 203-Coil inlet section; 301-Outer cylinder; 302-Top plug; 303-Bottom flange; 304-Cooling water inlet pipe through hole; 305-Boiler water outlet pipe through hole; 306-Cooling water outlet pipe through hole; 307-Boiler water inlet pipe through hole; 308-Fastener mounting hole. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0021] Please see Figures 1 to 3 This utility model provides a heat exchange device for detecting steam dryness, including: a shell 101, a heat exchange coil 102, a boiler water inlet 103, a boiler water outlet 104, a cooling water inlet 105, and a cooling water outlet 106.

[0022] The heat exchange coil 102 comprises, from top to bottom, a coil outlet section 201, a coil heat exchange section 202, and a coil inlet section 203. The heat exchange coil 102 is located inside the outer casing 101. The coil inlet section 203 extends to the outside of the side wall of the outer casing 101, serving as the boiler water inlet 103, which is the entrance for high-temperature boiler water into the heat exchange device. The coil outlet section 201 extends to the top of the outer casing 101, serving as the boiler water outlet 104, which is the interface for the external delivery of cooled boiler water. The coil heat exchange section 202 is a component used for heat exchange between the boiler water and the cooling coil. The heat exchange coil 202 is made of seamless austenitic stainless steel tubing coiled along a predetermined pitch.

[0023] The cooling water inlet 105 is located at the top of the housing 101, and the cooling water outlet 106 is located on the side wall of the housing 101. The cooling water inlet 105 and the cooling water outlet 106 are connected to the interior of the housing 101.

[0024] The heat exchanger contains two independent fluid domains. The boiler water inlet 103, heat exchange coil 102, and boiler water outlet 104 are interconnected, forming the boiler water circulation domain, where high-temperature boiler water flows. The cooling water inlet 105 and cooling water outlet 106 are connected to the outer shell, forming the cooling water circulation domain, where low-temperature cooling water flows. Heat exchange occurs when the media in both domains flow across the heat exchange coil's heat exchange walls, ultimately cooling the boiler water.

[0025] In this embodiment, the outer casing 101 includes an outer cylinder 301, a top plug 302, and a bottom flange 303. The top plug 302 is located at the top of the outer cylinder 301, and the bottom flange 303 is located at the bottom of the outer cylinder 301. The three components are welded together to ensure the sealing performance of the weld. The outer casing 101 is made of austenitic stainless steel, and corresponding openings such as a cooling water inlet 105 and a cooling water outlet 106 are provided. A bottom flange 303 is provided at the bottom of the outer casing 101 for mating with the bottom flange cover 107.

[0026] The top of the top plug 302 is provided with a cooling water inlet pipe through hole 304 and a boiler water outlet pipe through hole 305. The outer cylinder 301 is provided with a cooling water outlet pipe through hole 306 and a boiler water inlet pipe through hole 307 on its wall. The cooling water inlet 105 passes through the cooling water inlet pipe through hole 304, and the boiler water outlet 104 passes through the boiler water outlet pipe through hole 305. The cooling water outlet 106 passes through the cooling water outlet pipe through hole 306, and the boiler water inlet 103 passes through the boiler water inlet pipe through hole 307.

[0027] In this embodiment, a bottom flange cover 107 is provided at the bottom of the outer shell 101. The bottom flange cover 107 is made of austenitic stainless steel. The sealing surface between the bottom flange cover 107 and the bottom flange 303 is filled with a high-temperature sealing gasket 108, and the seal is achieved by fasteners 109 evenly distributed in the fastener mounting holes 308 around the perimeter. Mounting beams 110 are provided on both sides of the outer wall of the outer cylinder 301 for fixing and installing this device.

[0028] The working principle of the heat exchange device for steam dryness detection of this utility model is as follows: High-temperature boiler water flows in from the boiler water inlet 103 and undergoes heat exchange through the heat exchange coil 102. The cooled boiler water finally flows out from the boiler water outlet 104. Cooling water flows into the cooling water fluid domain from the cooling water inlet 105 and exchanges heat with the boiler water in the heat exchange coil 102 inside the outer shell 101 to cool down the boiler water. At the same time, the temperature of the cooling water rises after heat exchange and is finally discharged from the cooling water outlet 106.

[0029] This utility model discloses a heat exchange device for steam dryness detection. Through the synergistic action of the shell, heat exchange coils, and internal fluid, it rapidly cools the high-temperature boiler water (containing steam) diverted from the steam-water separator to a safe operating temperature for the detection probe, typically below 80℃. The entire device is constructed of austenitic stainless steel, offering excellent corrosion resistance and a long service life. A detachable flange sealing assembly allows for quick assembly and disassembly, facilitating descaling and maintenance of the heat exchange coil's outer wall. A dual-circulation cooling system with counter-current flow of boiler water and cooling water enhances heat exchange efficiency.

[0030] This device solves the problems of large deviations in dryness results caused by unstable furnace water temperature after cooling in traditional open-cooling methods for dryness detection, and probe failure due to high temperatures caused by poor cooling. Its detachable design allows for quick assembly and disassembly, facilitating descaling and maintenance of the heat exchange coils, extending equipment lifespan, and achieving cost reduction and efficiency improvement. Furthermore, its closed structure prevents splashing of high-temperature steam and water during heat exchange, reducing the risk of burns to operators.

[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in sequences other than those illustrated or described herein.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat exchange device for detecting steam dryness, characterized in that, include: The outer shell (101), heat exchange coil (102), boiler water inlet (103), boiler water outlet (104), cooling water inlet (105) and cooling water outlet (106); The heat exchange coil (102) includes, from top to bottom, a coil outlet section (201), a coil heat exchange section (202), and a coil inlet section (203); the heat exchange coil (102) is disposed inside the outer shell (101), the coil inlet section (203) extends to the outside of the side wall of the outer shell (101) as a boiler water inlet (103), and the coil outlet section (201) extends to the top of the outer shell (101) as a boiler water outlet (104); The cooling water inlet (105) is located on the top of the outer shell (101), and the cooling water outlet (106) is located on the side wall of the outer shell (101). The cooling water inlet (105) and the cooling water outlet (106) are connected to the interior of the outer shell (101).

2. The heat exchange device for steam dryness detection as described in claim 1, characterized in that, The outer casing (101) includes an outer cylinder (301), a top plug (302), and a bottom flange (303). The top plug (302) is located at the top of the outer cylinder (301), and the bottom flange (303) is located at the bottom of the outer cylinder (301).

3. The heat exchange device for steam dryness detection as described in claim 2, characterized in that, The top of the top plug (302) is provided with a cooling water inlet pipe through hole (304) and a boiler water outlet pipe through hole (305), and the outer cylinder (301) is provided with a cooling water outlet pipe through hole (306) and a boiler water inlet pipe through hole (307) on its wall. The cooling water inlet (105) passes through the cooling water inlet pipe through hole (304), the boiler water outlet (104) passes through the boiler water outlet pipe through hole (305); the cooling water outlet (106) passes through the cooling water outlet pipe through hole (306), and the boiler water inlet (103) passes through the boiler water inlet pipe through hole (307).

4. The heat exchange device for steam dryness detection as described in claim 3, characterized in that, The bottom of the outer shell (101) is provided with a bottom flange cover (107). The sealing surface between the bottom flange cover (107) and the bottom flange (303) is filled with a high-temperature sealing gasket (108), and is sealed by fasteners (109) that are evenly distributed in the fastener mounting holes (308) in the circumferential direction.

5. A heat exchange device for detecting steam dryness as described in claim 4, characterized in that, The outer wall of the outer cylinder (301) is provided with an installation beam (110).

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