Hole opening structure of heat exchanger header

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger header tapping structure which comprises an upper header, an exhaust pipe is connected to the top of the upper header, a steam-water inlet pipe is connected to the side wall of the upper header, and a separation hole is formed in the bottom of the upper header. The lower collection box is located below the upper collection box, the bottom of the lower collection box is connected with a drainage pipe, and a collection hole is formed in the top of the lower collection box; a middle connecting pipe is connected between the lower collecting box and the upper collecting box, and the area of the collecting holes is larger than that of the separating holes. The separation holes play a good role in flow limiting, steam is limited by the flow limiting effect and stays in the upper collecting box, steam with large specific volume is slowly gathered on the upper portion of the upper collecting box, water with small specific volume is gathered at the bottom of the upper collecting box, sufficient separation of the steam and the water is achieved, and the recycling rate of the steam is increased. A drain valve is not required to be arranged at the joint for draining water, and a big-end-down opening structure realizes a separating and draining function; the scheme is slightly modified, no extra equipment is added, the equipment failure rate is reduced, and the heat exchange efficiency of the heat exchanger is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger header opening structure. Background Art

[0002] Heat exchangers using steam as a heat source are widely used in various industries.

[0003] The existing heat exchanger tube groups are connected in series using a header. The main function of the header is to collect the working fluid or redistribute the working fluid to other pipes through the header, that is, to collect, mix and distribute the working fluid to ensure uniform distribution and uniform heating of the working fluid.

[0004] The headers are connected by connecting pipes, and the openings on the headers are of equal diameter to the connecting pipes. This means that during operation, steam and water flow together from the upper header to the lower header, preventing steam-water separation. This mixture then enters the rear tube bank, affecting the water trap subcooling, preventing efficient steam utilization and wasting a large amount of high-quality steam. Furthermore, the mixture impacts the heat exchange tube panels, reducing their service life. Adding valves such as check valves and steam traps to the header connections not only increases system complexity and wastes on-site layout space, but also poses a risk of mechanical fatigue, leading to jamming and failure over time, preventing steam-water separation.

[0005] Therefore, it is necessary to carry out structural design of the series headers to ensure the steam-water separation effect between the headers, increase the heat recovery rate, and extend the service life of the heat exchange tube screen. Utility Model Content

[0006] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides a heat exchanger header opening structure, which improves the heat recovery rate and prolongs the service life of the heat exchange tube panel by redesigning the header structure.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a heat exchanger header open hole structure, including an upper header, the top of the upper header is connected to an exhaust pipe, the side wall of the upper header is connected to a steam-water inlet pipe, and the bottom of the upper header is provided with a separation hole; a lower header, the lower header is located below the upper header, the bottom of the lower header is connected to a drain pipe, and the top of the lower header is provided with a collecting hole; an intermediate connecting pipe is connected between the lower header and the upper header, one end of the intermediate connecting pipe is connected to the separation hole, and the other end is connected to the collecting hole, and the area of ​​the collecting hole is larger than that of the separation hole.

[0008] The utility model discloses a heat exchanger header opening structure, in which the area of ​​the separation hole is smaller than the area of ​​the collection hole, so that the separation hole plays a good flow limiting role. The steam is subject to the flow limiting effect and stays in the upper header. The steam with large specific volume slowly gathers at the upper part of the upper header, and the water with small specific volume gathers at the bottom of the upper header, thereby achieving full separation of steam and water and improving the steam recovery rate. At the same time, there is no need to add a drain valve at the connection to drain water, and the opening structure with small upper part and large lower part realizes the function of separation and drainage. The overall modification of this solution is small, no additional equipment is added, the equipment failure rate is reduced, and the heat exchange efficiency of the heat exchanger is improved.

[0009] Furthermore, the width of the collection hole is 2-5 times the width of the separation hole.

[0010] Furthermore, the width of the collection hole is three times the width of the separation hole.

[0011] Furthermore, the collecting hole is a circular hole, and the separating hole is a circular hole.

[0012] Furthermore, the collecting hole is a circular hole, and the separating hole is a square hole.

[0013] Furthermore, the collecting hole is a square hole, and the separating hole is a round hole.

[0014] Furthermore, the collecting holes are square holes, and the separating holes are square holes.

[0015] Furthermore, there are multiple exhaust pipes arranged in an array along the length direction of the upper header.

[0016] Furthermore, there are multiple drainage pipes arranged in an array along the length direction of the lower header.

[0017] Furthermore, a plurality of the intermediate connecting pipes are provided along the length direction of the upper header, and the number of the intermediate connecting pipes is less than the number of the exhaust pipes.

[0018] The beneficial effects of the present invention are:

[0019] 1. The area of ​​the separation hole is smaller than that of the collection hole, making the separation hole play an effective flow-limiting role. The steam is restricted by the flow-limiting effect and stays in the upper header. The steam with a large specific volume slowly gathers at the upper part of the upper header, while the water with a small specific volume gathers at the bottom of the upper header. This fully separates the steam and water and improves the steam recovery rate. At the same time, there is no need to add a drain valve at the connection point to drain water. The small upper and large lower hole structure realizes the separation and drainage function. This solution requires minimal overall changes and does not add additional equipment, which reduces equipment failure rate and improves the heat exchange efficiency of the heat exchanger.

[0020] 2. By setting the number of intermediate connecting pipes to be smaller than the number of exhaust pipes, the flow limiting effect of the separation hole is further guaranteed, so that steam and water are fully separated and the steam recovery rate is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further explained below in combination with the drawings and embodiments.

[0022] Fig. 1 It is the side view schematic diagram of the heat exchanger header opening structure in the utility model.

[0023] Fig. 2 It is the partial cutaway schematic diagram of the separation hole in the utility model.

[0024] Fig. 3 It is the plan view schematic diagram of the heat exchanger header opening structure in the utility model.

[0025] In the drawing: 1, upper header; 11, exhaust pipe; 12, steam water inlet pipe; 13, intermediate connecting pipe; 14, separation hole; 2, lower header; 21, drain pipe; 22, collection hole. DETAILED DESCRIPTION

[0026] The utility model will be explained in further detail in combination with the drawings. These drawings are all simplified schematic diagrams, just to schematically show the basic structure of the utility model, therefore it only shows the structure related to the utility model.

[0027] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or position relationship shown in the drawings, just for the convenience of describing the utility model and simplifying the description, and not to indicate or imply that the indicated device or element must have a particular orientation, structure and operation, therefore it cannot be understood as the limitation of the utility model. In addition, the features limited as "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more. In the description of the utility model, it is explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] The utility model discloses a heat exchanger header opening structure.

[0029] Referring to Figs. 1 to 3 A heat exchanger header opening structure, comprising an upper header 1 and a lower header 2 arranged below the upper header 1, and a middle connecting pipe 13 connected between the upper header 1 and the lower header 2. The top of the upper header 1 is connected with an exhaust pipe 11 for facilitating steam discharge. The sidewall of the upper header 1 is connected with a steam-water inlet pipe 12 for facilitating steam-water mixture entering the upper header 1. The steam-water inlet pipe 12 is located obliquely above the sidewall of the upper header 1, which is conducive to the collection of steam at the top of the upper header 1. The bottom of the lower header 2 is connected with a drain pipe 21 for water discharge. The bottom of the upper header 1 is provided with a separation hole 14, which is in communication with the middle connecting pipe 13. The top of the lower header 2 is provided with a collection hole 22, which is in communication with the end of the middle connecting pipe 13 away from the separation hole 14, so that the water at the bottom of the upper header 1 flows into the lower header 2 through the middle connecting pipe 13. The area of the collection hole 22 is greater than that of the separation hole 14, and the width of the collection hole 22 is 2-5 times, preferably 3 times, the width of the separation hole 14.

[0030] The area of the separation hole 14 is much smaller than that of the collection hole 22, so that the separation hole 14 plays a good flow limiting role, thereby increasing the time for water to pass through the separation hole 14, while the steam is retained in the upper header 1 due to the flow limiting effect. The steam, due to its larger specific volume, slowly converges at the upper part of the upper header 1 and is discharged from the exhaust pipe 11, achieving sufficient separation of steam and water and improving the recovery rate of steam. At the same time, the connection does not need to be provided with a drain valve, and the large opening structure at the bottom and the small opening structure at the top achieve the function of separating and draining water. The overall modification is small, no additional equipment is added, the equipment failure rate is reduced, and the heat exchange efficiency of the heat exchanger is improved.

[0031] In addition, the exhaust pipe 11 and the drain pipe 21 are arranged in multiple along the length direction of the upper header 1, and the middle connecting pipe 13 is provided with multiple along the length direction of the upper header 1. The number of the middle connecting pipe 13 is less than that of the exhaust pipe 11, which further guarantees the flow limiting effect. In the embodiment, the number of the middle connecting pipe 13 is two.

[0032] Embodiment one:

[0033] The collection hole 22 is a round hole, and the separation hole 14 is a round hole.

[0034] Embodiment two:

[0035] The collection hole 22 is a round hole, and the separation hole 14 is a square hole.

[0036] Embodiment three:

[0037] The collection hole 22 is a square hole, and the separation hole 14 is a round hole.

[0038] Embodiment four:

[0039] The collecting hole 22 is a square hole, and the separating hole 14 is a square hole.

[0040] Working principle: the area of the separating hole 14 is smaller than that of the collecting hole 22, so that the separating hole 14 plays a good flow limiting role, the steam is subjected to the flow limiting role, stays in the upper header 1, the steam with a larger specific volume slowly converges on the upper part of the upper header 1, and the water with a smaller specific volume converges on the bottom of the upper header 1, so that the steam and the water are fully separated, and the steam recovery rate is improved; meanwhile, the connecting part does not need to be provided with a drain valve, and the opening structure with a small upper part and a large lower part realizes the function of separating and draining water; the scheme has small overall changes, does not increase additional equipment, reduces the equipment failure rate, and improves the heat exchange efficiency of the heat exchanger. In addition, through the setting that the number of the intermediate connecting pipes 13 is smaller than that of the exhaust pipes 11, the flow limiting effect of the separating hole 14 is further guaranteed, the steam and the water are fully separated, and the steam recovery rate is improved.

[0041] Based on the above ideal embodiments of the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A heat exchanger header opening structure, characterized in that: include An upper header (1), wherein the top of the upper header (1) is connected to an exhaust pipe (11), the side wall of the upper header (1) is connected to a steam-water inlet pipe (12), and the bottom of the upper header (1) is provided with a separation hole (14); A lower header (2), the lower header (2) being located below the upper header (1), the bottom of the lower header (2) being connected to a drainage pipe (21), and the top of the lower header (2) being provided with a collection hole (22); An intermediate connecting pipe (13) is connected between the lower header (2) and the upper header (1), one end of the intermediate connecting pipe (13) is in communication with the separation hole (14), and the other end is in communication with the collection hole (22), and the area of ​​the collection hole (22) is larger than that of the separation hole (14).

2. A heat exchanger header opening structure according to claim 1, characterized in that: The width of the collecting hole (22) is 2-5 times the width of the separating hole (14).

3. The heat exchanger header opening structure according to claim 2, characterized in that: The width of the collecting hole (22) is three times the width of the separating hole (14).

4. The heat exchanger header opening structure according to claim 1, characterized in that: The collecting hole (22) is a circular hole, and the separating hole (14) is a circular hole.

5. The heat exchanger header opening structure according to claim 1, characterized in that: The collecting hole (22) is a circular hole, and the separating hole (14) is a square hole.

6. The heat exchanger header opening structure according to claim 1, characterized in that: The collecting hole (22) is a square hole, and the separating hole (14) is a round hole.

7. The heat exchanger header opening structure according to claim 1, characterized in that: The collecting hole (22) is a square hole, and the separating hole (14) is a square hole.

8. The heat exchanger header opening structure according to claim 1, characterized in that: A plurality of exhaust pipes (11) are arranged in an array along the length direction of the upper header (1).

9. The heat exchanger header opening structure according to claim 1, characterized in that: There are a plurality of drainage pipes (21) arranged in an array along the length direction of the lower header (2).

10. The heat exchanger header opening structure according to claim 8, characterized in that: A plurality of intermediate connecting pipes (13) are provided along the length direction of the upper header (1), and the number of the intermediate connecting pipes (13) is smaller than the number of the exhaust pipes (11).

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