CN215336272U - Direct-flow boiler superheater and header structure - Google Patents
Direct-flow boiler superheater and header structure Download PDFInfo
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- CN215336272U CN215336272U CN202121036290.7U CN202121036290U CN215336272U CN 215336272 U CN215336272 U CN 215336272U CN 202121036290 U CN202121036290 U CN 202121036290U CN 215336272 U CN215336272 U CN 215336272U
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Abstract
The utility model relates to the technical field of thermal power, in particular to a once-through boiler superheater and header structure, which comprises: over heater body, this internal header mechanism that is provided with of over heater, header mechanism includes: entry collection case, export collection case and collection case pipe panel, collection case pipe panel includes: the utility model relates to a direct-current double-tangent round boiler, which comprises a hole expanding pipe and a body pipe, wherein the hole expanding pipe is provided with a first throttling hole, and the body pipe is provided with a second throttling hole.
Description
Technical Field
The utility model relates to the technical field of thermal power, in particular to a direct-flow boiler superheater and a header structure.
Background
The current situation of thermal power is more severe, and widely recommended energy sources such as new energy, renewable energy, clean energy and the like bring great impact on thermal power. Under the condition that the electricity utilization hours are reduced year by year and the electricity price is low, how to grasp the existing electricity generation amount and grasp the unplanned electricity amount is an important means for determining the sustainable development of enterprises. The important hand grip for the sustainable development is to ensure the reliability and safety of the equipment. The leakage of the heating surface of the boiler is always an important factor influencing the safe and stable operation of the unit and is also a key factor.
At present, a large number of domestic direct-current boilers of large thermal generator sets are mainly of a pi-shaped structure, superheaters are of a vertical full-suspension structure, and throttling devices of different specifications are arranged at the inlets of the superheaters for adjusting steam flow to eliminate thermal deviation generated by non-uniform flue gas temperature fields in the width direction of the boilers. The primary steam-water system of the boiler is huge, the unit is still influenced by factors such as foreign matters left over by capital construction, running scale peeling, external foreign matters brought in by overhauling and tube replacement, and the like after running for many years, and the foreign matters are often blocked by a throttling hole in the running process to cause wall temperature over-limit leakage, thereby seriously threatening the long-period running of the boiler. According to statistics, the overtemperature pipe explosion caused by the blockage of the superheater foreign matter in 2007-2016 accounts for about 80% of unsafe events of superheater leakage. The Huaneng Yuhuan power plant as a national '863' introduced unit has the defects that overheater leakage caused by the blockage of a throttling hole by foreign matters appears for a plurality of times after 10 years of operation, the generated energy of the power plant and the annual average generated electricity utilization hours are influenced, and the digestion and absorption of related technologies of million units are also restricted.
The number of unplanned shutdown times for the boiler superheater tube explosion accounts for 40% of the number of the boiler non-shutdown times of the supercritical (super) critical unit every year, wherein the number of times of tube explosion caused by foreign matters or oxide scales blocked by the once-through boiler with the superheater tube coil inlet structure is larger than that of the unit without the throttling hole. Therefore, the overheater explosion caused by the throttling hole foreign matter blockage problem is a common fault, and the abnormal shutdown of the unit is further caused, so that the safe operation of the unit is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In some embodiments of the application, a direct current boiler superheater and header structure are provided, through set up the reaming pipe in the header tube panel, make direct current bitangent circle boiler temperature field be "M" type structure along stove width direction and distribute, the problem that current direct current boiler superheater often appears the foreign matter in service and blocks up the orifice and arouse that wall temperature transfinites the leakage is solved, the anti-blocking ability of easily blockking up the position orifice has been improved by a wide margin under the not influenced prerequisite of assurance unit wall temperature parameter, direct current boiler superheater foreign matter jam difficult problem has thoroughly been solved, boiler "four tubes" long period safe operation has further been guaranteed.
In some embodiments of the present application, a once-through boiler superheater and header structure is provided, comprising: the superheater comprises a superheater body, wherein a header mechanism is arranged in the superheater body; the header mechanism includes: the system comprises an inlet header, an outlet header and a header pipe panel, wherein the inlet header is connected to the outlet header through the header pipe panel; the header pipe panel includes: the temperature field of the once-through boiler is of an M-shaped structure.
In some embodiments of the present application, the header tube panel is provided as an evenly arranged perforated tube and a body tube.
In some embodiments of the present application, the header tube panel further comprises: the temperature detection device is set to be a plurality of temperature sensors which are uniformly arranged on the inner wall of the header pipe panel to detect the temperature on the inner wall of the header pipe panel.
In some embodiments of the present application, the inlet header comprises: the first end portion is communicated with the reaming pipe and the body pipe respectively, and the second end portion is communicated with the reaming pipe and the body pipe respectively to form a throttling passage.
In some embodiments of the present application, the inlet header is provided as a three-pass inlet header.
In some embodiments of the present application, the inlet header is provided as a four-pass inlet header.
In some embodiments of the present application, the superheater body includes: a magnetic flux detection device connected to the superheater body to detect a magnetic flux inside the header mechanism.
In some embodiments of the present application, the superheater body further comprises: the image pick-up device is installed in the superheater body and is provided with a probe, and the probe collects image information inside the header mechanism.
The utility model relates to the technical field of thermal power, in particular to a once-through boiler superheater and header structure, which comprises: over heater body, this internal header mechanism that is provided with of over heater, header mechanism includes: entry collection case, export collection case and collection case pipe panel, collection case pipe panel includes: the utility model relates to a direct-current double-tangent round boiler, which comprises a hole expanding pipe and a body pipe, wherein the hole expanding pipe is provided with a first throttling hole, and the body pipe is provided with a second throttling hole.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a once-through boiler superheater and header structure in accordance with certain embodiments of the present invention;
FIG. 2 is a simplified schematic illustration of a triple inlet header of a once-through boiler superheater and header configuration in accordance with certain embodiments of the present invention;
FIG. 3 is a simplified schematic illustration of a four-pass inlet header of a once-through boiler superheater and header configuration in accordance with certain embodiments of the present invention.
Reference numerals:
100. a header mechanism; 200. third, an inlet header is arranged; 300. four inlet headers; 400. header tube panel.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
1-3, a once-through boiler superheater and header structure in accordance with some embodiments of the present application includes: the superheater body, this internal header mechanism 100 that is provided with of superheater.
In this application, still be provided with magnetic flux detection device in the over heater body.
The magnetic flux detection means is for detecting the magnetic flux inside the header mechanism 100.
The magnetic flux detection device is connected to the superheater body.
According to the superheater body in some embodiments of the application, it includes: an image pickup device.
The camera device is provided with a probe, and image information inside the header mechanism 100 is acquired by the probe.
The camera device is installed in the superheater body.
According to the header mechanism 100 in some embodiments of the present application, it includes: an inlet header, an outlet header and a header tube panel 400,
wherein the inlet header is connected to the outlet header by header tube panels 400.
As shown in fig. 1-3, an inlet header in some embodiments according to the present application includes: the first end portion is communicated with the reaming pipe and the body pipe respectively, and the second end portion is communicated with the reaming pipe and the body pipe respectively to form a throttling passage.
It should be noted that the inlet header of the present application is provided as a three-pass inlet header 200 and a four-pass inlet header 300.
According to some embodiments of the present application, a header tube panel 400 includes: a reaming pipe and a body pipe.
The hole expanding pipe is provided with a first throttling hole, and the body pipe is provided with a second throttling hole.
Wherein the diameter of the first throttling hole is larger than that of the second throttling hole, so that the temperature field of the once-through boiler is of an M-shaped structure.
In the application, the hole expanding pipes are arranged in the header pipe panel 400, so that the temperature field of the direct-current double-tangential boiler is distributed in an M-shaped structure along the width direction of the boiler, namely, the heat load of 4 end parts, namely two sides, of the header and the position along the center of the boiler width is relatively low, the wall temperature of the header pipe panel 400 is wholly low, so that the influence of local hole expanding on the low heat load pipe panel is limited, and the problem that the wall temperature is over-limited and leaked due to the fact that a throttling hole is blocked by foreign matters in the operation of the existing direct-current boiler superheater is solved.
It should be noted that the orifice diameter of the No. 6-11 tubes of the three-inlet header 200 of the present application is enlarged from phi 9.5mm to 25mm from phi 9.5mm, and the No. 1, 2, 3, 27, 28, 29, 30, 31, 32, 56, 57 and 58; the throttle aperture of the 1 st, 2 nd, 3 rd, 45 th, 46 th, 47 th, 48 th, 49 th, 50 th, 92 th, 93 th and 94 th pipes of the four-inlet header 300 is enlarged to 30mm from phi 10.5mm, so that the anti-blocking capability of the throttle hole at the position easy to block is greatly improved on the premise of ensuring that the wall temperature parameter of the unit is not influenced, the problem of foreign matter blockage of the direct-flow boiler superheater is thoroughly solved, and the long-period safe operation of four pipes of the boiler is further ensured.
According to some embodiments of the present application, a header tube panel 400 includes: a temperature detection device.
The temperature detection means is used to detect the temperature on the inner wall of the header pipe panel 400.
The temperature detection means is provided as a plurality of temperature sensors, which are uniformly disposed on the inner wall of the header pipe panel 400.
It should be noted that, in the application, the temperature sensor is preferentially installed in a 'multi-generation region' with abnormal wall temperature, a 'wall temperature deviation method' is innovatively adopted to replace the original 'wall temperature absolute value analysis method', the wall temperature of the tube is closely monitored, operation measures are timely taken to avoid tube explosion due to overtemperature of the heating surface, meanwhile, the defect hidden danger is eliminated by using a scheduling machine, and four 'zero leakage' operation records of the ultra-supercritical direct current boiler with long period are created.
To sum up, the utility model relates to the technical field of thermal power, in particular to a once-through boiler superheater and header structure, which comprises: over heater body, this internal header mechanism that is provided with of over heater, header mechanism includes: entry collection case, export collection case and collection case pipe panel, collection case pipe panel includes: the utility model relates to a direct-current double-tangent round boiler, which comprises a hole expanding pipe and a body pipe, wherein the hole expanding pipe is provided with a first throttling hole, and the body pipe is provided with a second throttling hole.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A once-through boiler superheater and header structure comprising:
the superheater comprises a superheater body, wherein a header mechanism is arranged in the superheater body;
the header mechanism includes: the system comprises an inlet header, an outlet header and a header pipe panel, wherein the inlet header is connected to the outlet header through the header pipe panel;
its characterized in that, the header pipe panel includes:
the temperature field of the once-through boiler is of an M-shaped structure.
2. The once-through boiler superheater and header structure of claim 1, wherein said header tube panels are provided as uniformly arranged perforated tubes and body tubes.
3. The once-through boiler superheater and header structure of claim 1, wherein said header tube panel further comprises: the temperature detection device is set to be a plurality of temperature sensors which are uniformly arranged on the inner wall of the header pipe panel to detect the temperature on the inner wall of the header pipe panel.
4. The once-through boiler superheater and header structure of claim 1, wherein said inlet header comprises: the first end portion is communicated with the reaming pipe and the body pipe respectively, and the second end portion is communicated with the reaming pipe and the body pipe respectively to form a throttling passage.
5. The once-through boiler superheater and header structure of claim 4 wherein said inlet header is configured as a triple inlet header.
6. The once-through boiler superheater and header structure of claim 4 wherein said inlet header is configured as a four-pass inlet header.
7. The once-through boiler superheater and header structure of claim 1, wherein said superheater body comprises: a magnetic flux detection device connected to the superheater body to detect a magnetic flux inside the header mechanism.
8. The once-through boiler superheater and header structure of claim 1, wherein said superheater body further comprises: the image pick-up device is installed in the superheater body and is provided with a probe, and the probe collects image information inside the header mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121036290.7U CN215336272U (en) | 2021-05-14 | 2021-05-14 | Direct-flow boiler superheater and header structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121036290.7U CN215336272U (en) | 2021-05-14 | 2021-05-14 | Direct-flow boiler superheater and header structure |
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| Publication Number | Publication Date |
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| CN215336272U true CN215336272U (en) | 2021-12-28 |
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| CN202121036290.7U Active CN215336272U (en) | 2021-05-14 | 2021-05-14 | Direct-flow boiler superheater and header structure |
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| CN (1) | CN215336272U (en) |
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2021
- 2021-05-14 CN CN202121036290.7U patent/CN215336272U/en active Active
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