CN111594820B - A collection case structure for reducing tube panel flow deviation - Google Patents
A collection case structure for reducing tube panel flow deviation Download PDFInfo
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- CN111594820B CN111594820B CN202010484935.7A CN202010484935A CN111594820B CN 111594820 B CN111594820 B CN 111594820B CN 202010484935 A CN202010484935 A CN 202010484935A CN 111594820 B CN111594820 B CN 111594820B
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- header
- middle section
- outlet header
- tube panel
- side sections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
- F22B37/221—Covers for drums, collectors, manholes or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/10—Water tubes; Accessories therefor
- F22B37/12—Forms of water tubes, e.g. of varying cross-section
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention relates to a header structure for reducing flow deviation of a tube panel, and belongs to the technical field of steam power generation boilers. The device comprises an inlet header, a heating surface tube panel and an outlet header, wherein the inlet header is communicated with the outlet header through the heating surface tube panel; the inlet header comprises an inlet header middle section and inlet header two-side sections, and two ends of the inlet header middle section are fixedly connected with the inlet header two-side sections respectively; the outlet header comprises an outlet header middle section and outlet header two-side sections, and two ends of the outlet header middle section are fixedly connected with the outlet header two-side sections respectively. The invention aims to develop a header structure for reducing flow deviation of tube panels, which reduces flow distribution deviation among tube panels of a single-stage heating surface of a boiler, thereby reducing temperature deviation among the tube panels.
Description
Technical Field
The invention relates to a header structure for reducing flow deviation of a tube panel, and belongs to the technical field of steam power generation boilers.
Background
With the development of the technology of large-capacity thermal generator sets in China, the selection of steam parameters of boilers gradually approaches to the allowable upper limit of steel materials for the boilers, and thus, stricter requirements are provided for the temperature deviation control among tube panels of single-stage heating surfaces of the boilers.
The conventional boiler heating surface header structure causes a certain flow distribution deviation of a single-stage heating surface tube panel of a boiler in the actual operation process, and the flow distribution deviation causes temperature deviation of each heating surface tube panel. If the temperature deviation among tube panels of all heating surfaces is overlarge, particularly for a high-temperature heating surface, the phenomenon that the overall steam temperature level of the heating surface is low but the local heating surface is over-temperature can occur in the actual operation process of the boiler, after the phenomenon occurs, the service life of a heating surface tube with the local over-temperature is easily reduced, and the generation rate of oxide skin on the inner wall of the tube is increased; if the overtemperature degree is more serious, the tube explosion accident of the heating surface tube is easily caused, and the safety and the reliability of the use of the boiler are influenced. In addition, after the rate of scale formation on the inner wall of the pipe is increased, the probability and amount of scale falling off will be increased rapidly along with the process of stopping and starting the boiler, resulting in high maintenance and repair costs for the thermal power plant.
Based on the above technical problems, it is desirable to provide a header structure for reducing the flow deviation of tube panels to solve the above technical problems.
Disclosure of Invention
The invention aims to develop a header structure for reducing flow deviation of tube panels, which reduces flow distribution deviation among tube panels of a single-stage heating surface of a boiler, thereby reducing temperature deviation among the tube panels. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or critical elements of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
a header structure for reducing flow deviation of a tube panel comprises an inlet header, a heating surface tube panel and an outlet header, wherein the inlet header is communicated with the outlet header through the heating surface tube panel;
the inlet header comprises an inlet header middle section and inlet header two-side sections, and two ends of the inlet header middle section are fixedly connected with the inlet header two-side sections respectively;
the outlet header comprises an outlet header middle section and outlet header two-side sections, and two ends of the outlet header middle section are fixedly connected with the outlet header two-side sections respectively.
Preferably: the cross sections of the inlet header middle section, the inlet header two-side sections, the outlet header middle section, the outlet header two-side sections and the heating surface tube panel are circular.
Preferably: the inner diameter of the two side sections of the outlet header is larger than that of the middle section of the outlet header, and the wall thickness of the middle section of the outlet header is smaller than that of the two side sections of the outlet header.
Preferably: the inner diameter of the middle section of the inlet header is larger than the inner diameters of the sections on two sides of the inlet header, and the wall thickness of the middle section of the inlet header is larger than the wall thickness of the sections on two sides of the inlet header.
Preferably: the heating surface tube panel is composed of tubes which are uniformly arranged.
Preferably: still include the reducing pipe, export collection case middle part district and export collection case both sides district section pass through reducing pipe fixed connection.
Preferably: the reducer pipe is a concentric reducer pipe.
The invention has the following beneficial effects:
1. the structure is simple, the cost of manpower and material resources is low, the maintenance cost is low, the installation and the disassembly are easy, the structural design is reasonable, and the device is suitable for popularization and use;
2. different sections of the inlet header and the outlet header adopt different header inner diameters and header wall thicknesses, the dynamic and static pressure distribution trends of working media in the flowing process of the heating surface tube panels are changed, the effect of reducing the pressure difference between the inlet header and the outlet header is achieved, and therefore the flow distribution deviation among the heating surface tube panels is reduced, the problem that the temperature deviation of the heating surface tube panels is large due to the flow distribution deviation is solved, the over-temperature of a local heating surface is avoided, the service life of tubes is prolonged, and the safety and the reliability of the use of the boiler are improved.
Drawings
FIG. 1 is a front view of a header configuration for reducing tube panel flow deflection;
FIG. 2 is a side view of a header structure for reducing tube panel flow deflection;
in the figure, 1-inlet header, 1-1-inlet header middle section, 1-2-inlet header two-side section, 2-heating surface tube panel, 3-outlet header, 3-1-outlet header middle section, 3-2-outlet header two-side section and 4-reducer pipe.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The connection mentioned in the invention is divided into a fixed connection and a detachable connection, the fixed connection is a welding connection mode, the detachable connection includes but is not limited to conventional detaching modes such as a threaded connection, a buckle connection, a pin connection and a hinge connection, when the specific connecting mode is not clearly limited, at least one connecting mode can be found in the existing connecting modes by default to realize the function, and a person skilled in the art can select the connecting mode according to the needs. For example: the fixed connection selects welding connection, and the detachable connection selects hinge connection.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1 and fig. 2, and a header structure for reducing tube panel flow deviation of the present embodiment includes an inlet header 1, a heating surface tube panel 2, and an outlet header 3, where the inlet header 1 is communicated with the outlet header 3 through the heating surface tube panel 2;
the inlet header 1 comprises an inlet header middle section 1-1 and inlet header two-side sections 1-2, and two ends of the inlet header middle section 1-1 are fixedly connected with the inlet header two-side sections 1-2 respectively;
the outlet header 3 comprises an outlet header middle section 3-1 and outlet header two-side sections 3-2, and the two ends of the outlet header middle section 3-1 are fixedly connected with the outlet header two-side sections 3-2 respectively.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 1 and 2, and the cross-sections of the inlet header middle section 1-1, the inlet header both side sections 1-2, the outlet header middle section 3-1, the outlet header both side sections 3-2, and the heat receiving surface tube panel 2 are circular in the header structure of the present embodiment for reducing the tube panel flow rate deviation.
The third concrete implementation mode: referring to fig. 1 and 2, the header structure for reducing the flow rate deviation of the tube panel of the present embodiment is described, wherein the inner diameter of the outlet header two side sections 3-2 is larger than the inner diameter of the outlet header middle section 3-1, and the wall thickness of the outlet header middle section 3-1 is smaller than the wall thickness of the outlet header two side sections 3-2.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 and 2, and the header structure for reducing the flow deviation of the tube panels in the embodiment is characterized in that the inner diameter of the middle section 1-1 of the inlet header is larger than the inner diameters of the two side sections 1-2 of the inlet header, the wall thickness of the middle section 1-1 of the inlet header is larger than the wall thickness of the two side sections 1-2 of the inlet header, based on the basic theorem of hydrodynamics, bernoulli's theorem, different sections of the inlet header 1 and the outlet header 3 adopt different header inner diameters and header wall thicknesses, the dynamic and static pressure distribution trends of the working medium in the flowing process of the heating surface tube panels 2 are changed, the effect of reducing the pressure difference between the inlet header 1 and the outlet header 3 is achieved, the flow distribution deviation between the heating surface tube panels 2 is reduced, and the problem of large temperature deviation of the heating surface tube panels 2 caused by the flow distribution deviation is solved, the overtemperature of the tube panel 2 of the local heating surface is avoided, the service life of the tube is prolonged, and the safety and the reliability of the boiler are improved.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 1 and 2, and the heat receiving surface tube panel 2 of the present embodiment is composed of tubes arranged uniformly, and has a header structure for reducing flow rate deviation of the tube panel.
The sixth specific implementation mode: the present embodiment is described with reference to fig. 1 and 2, and the header structure for reducing the flow deviation of the tube panel of the present embodiment further includes a reducer pipe 4, the outlet header middle section 3-1 and the outlet header two-side sections 3-2 are fixedly connected by the reducer pipe 4, the inner diameters of the two ends of the reducer pipe 4 are different, and the wall thicknesses of the reducer pipe 4 decrease gradually from the large inner diameter to the small inner diameter.
The seventh embodiment: the present embodiment will be described with reference to fig. 1 and 2, and the reducer pipe 4 is a concentric reducer pipe in the present embodiment, which is a header structure for reducing the flow rate deviation of the tube panel.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (5)
1. The utility model provides a collection case structure for reducing tube panel flow deviation which characterized in that: the device comprises an inlet header (1), a heating surface tube panel (2) and an outlet header (3), wherein the inlet header (1) is communicated with the outlet header (3) through the heating surface tube panel (2);
the inlet header (1) comprises an inlet header middle section (1-1) and inlet header two-side sections (1-2), and two ends of the inlet header middle section (1-1) are fixedly connected with the inlet header two-side sections (1-2) respectively;
the outlet header (3) comprises an outlet header middle section (3-1) and outlet header two-side sections (3-2), and two ends of the outlet header middle section (3-1) are fixedly connected with the outlet header two-side sections (3-2) respectively;
the inner diameter of the sections (3-2) at the two sides of the outlet header is larger than that of the middle section (3-1) of the outlet header, and the wall thickness of the middle section (3-1) of the outlet header is smaller than that of the sections (3-2) at the two sides of the outlet header;
the inner diameter of the middle section (1-1) of the inlet header is larger than the inner diameters of the two side sections (1-2) of the inlet header, and the wall thickness of the middle section (1-1) of the inlet header is larger than the wall thickness of the two side sections (1-2) of the inlet header.
2. A header structure for reducing tube panel flow deviation according to claim 1, wherein: the cross sections of the inlet header middle section (1-1), the inlet header two-side sections (1-2), the outlet header middle section (3-1), the outlet header two-side sections (3-2) and the heating surface tube panel (2) are circular.
3. A header structure for reducing tube panel flow deviation according to claim 1, wherein: the heating surface tube panel (2) is composed of tubes which are uniformly distributed.
4. A header structure for reducing tube panel flow deviation according to claim 2, wherein: the outlet header comprises an outlet header middle section (3-1) and outlet header two-side sections (3-2), and is characterized by further comprising a reducer pipe (4), wherein the outlet header middle section (3-1) and the outlet header two-side sections (3-2) are fixedly connected through the reducer pipe (4).
5. A header structure for reducing tube panel flow deviation according to claim 4, wherein: the reducer pipe (4) is a concentric reducer pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010484935.7A CN111594820B (en) | 2020-06-01 | 2020-06-01 | A collection case structure for reducing tube panel flow deviation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010484935.7A CN111594820B (en) | 2020-06-01 | 2020-06-01 | A collection case structure for reducing tube panel flow deviation |
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| Publication Number | Publication Date |
|---|---|
| CN111594820A CN111594820A (en) | 2020-08-28 |
| CN111594820B true CN111594820B (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010484935.7A Active CN111594820B (en) | 2020-06-01 | 2020-06-01 | A collection case structure for reducing tube panel flow deviation |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2495910Y (en) * | 2001-09-12 | 2002-06-19 | 王孟浩 | Mechanism for reducing temp. deviation of over-heating device of boiler reheater |
| JP2009097739A (en) * | 2007-10-15 | 2009-05-07 | Babcock Hitachi Kk | Supporting structure of header |
| CN103244942A (en) * | 2013-03-29 | 2013-08-14 | 上海锅炉厂有限公司 | Utility boiler heating surface design method applicable to flue-gas temperature deviation fixation |
| CN207196456U (en) * | 2017-09-28 | 2018-04-06 | 哈尔滨锅炉厂有限责任公司 | Collect the multistage collection box structure of multitube extraction suitable for the single tube of 630 DEG C of grade boilers |
| CN209246425U (en) * | 2018-11-27 | 2019-08-13 | 北京巴布科克·威尔科克斯有限公司 | Solar heat absorber from pendant platen structure |
-
2020
- 2020-06-01 CN CN202010484935.7A patent/CN111594820B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2495910Y (en) * | 2001-09-12 | 2002-06-19 | 王孟浩 | Mechanism for reducing temp. deviation of over-heating device of boiler reheater |
| JP2009097739A (en) * | 2007-10-15 | 2009-05-07 | Babcock Hitachi Kk | Supporting structure of header |
| CN103244942A (en) * | 2013-03-29 | 2013-08-14 | 上海锅炉厂有限公司 | Utility boiler heating surface design method applicable to flue-gas temperature deviation fixation |
| CN207196456U (en) * | 2017-09-28 | 2018-04-06 | 哈尔滨锅炉厂有限责任公司 | Collect the multistage collection box structure of multitube extraction suitable for the single tube of 630 DEG C of grade boilers |
| CN209246425U (en) * | 2018-11-27 | 2019-08-13 | 北京巴布科克·威尔科克斯有限公司 | Solar heat absorber from pendant platen structure |
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| Publication number | Publication date |
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| CN111594820A (en) | 2020-08-28 |
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