CN218601308U - Subregion speed sensor of air preheater - Google Patents
Subregion speed sensor of air preheater Download PDFInfo
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- CN218601308U CN218601308U CN202222270146.0U CN202222270146U CN218601308U CN 218601308 U CN218601308 U CN 218601308U CN 202222270146 U CN202222270146 U CN 202222270146U CN 218601308 U CN218601308 U CN 218601308U
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- air
- side measuring
- measuring
- air preheater
- flue gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a partition speed measuring device of an air preheater, which comprises a plurality of smoke side measuring tubes and a plurality of air side measuring tubes which are arranged on a rotor of the air preheater, wherein the smoke side measuring tubes are arranged on a semi-circle of the circumference of the air preheater, and the air side measuring tubes are arranged on the other semi-circle of the circumference of the air preheater; the utility model discloses in be provided with many flue gas side survey buret and many air side survey buret, survey buret setting on the rotor of air preheater through surveying the flue gas side survey buret and many air side, make a sector region of a definite flue gas side subregion on each flue gas side survey buret real-time supervision heat accumulation board, a sector region of a definite air side subregion on each air side survey buret real-time supervision heat accumulation board, ensured in the air preheater operation process, each region all can be monitored on the heat accumulation board, confirm through the contrast whether to have the jam, the untimely technical problem of monitoring device monitoring inside the air preheater among the prior art has been solved.
Description
Technical Field
The utility model discloses coal fired power plant air preheater field relates to a speed sensor, concretely a subregion speed sensor of air preheater.
Background
At present, a coal-fired power plant is a primary energy source, so that the pressure of energy conservation and emission reduction of the coal-fired plant is increasingly greater. In recent years, in order to ensure that the emission of nitrogen oxides in flue gas reaches the standard, a method of excessively spraying ammonia to enhance the reaction of the nitrogen oxides is often adopted in part of thermal power plants, although the emission requirement of the nitrogen oxides is met, a new problem is brought, and the ammonia sprayed more and SO in the flue gas are mixed 3 Reaction to form NH 4 HSO 4 In the cold section of the air preheater (146℃)
～207℃)，NH 4 HSO 4 Can the condensation become viscidity jelly, further combine the absorption on air preheater heat accumulator plate with the dust in the flue gas, constantly accumulate, finally lead to the stifled ash of air preheater, can reduce the heat exchange efficiency of air preheater on the one hand, cause the loss increase of discharging fume, on the other hand, the resistance of air preheater often increases very greatly, causes power consumption increases such as draught fan.
The operating personnel of the coal-fired power plant generally monitor the operating parameters of the unit through a controller (DCS), but in the actual operation process of the unit, because the number of measuring points at the air preheater is small and the data is always total resistance data, the total resistance change is not obvious in the initial stage of blockage of the air preheater, the operating personnel can hardly find the blockage in time and confirm the specific position of the heat storage plate, when the total resistance change is obvious, the blockage of the air preheater becomes serious, and the workload of the ash removal device can be increased greatly.
Disclosure of Invention
Not enough to prior art exists, the utility model aims to provide a subregion speed sensor of air preheater solves the inside monitoring devices's of prior art air preheater technical problem that monitoring is untimely.
In order to solve the technical problem, the utility model discloses a following technical scheme realizes:
a partition speed measuring device of an air preheater comprises a plurality of smoke side measuring tubes and a plurality of air side measuring tubes, wherein the smoke side measuring tubes and the air side measuring tubes are arranged on a rotor of the air preheater;
the smoke side measuring pipe consists of a first smoke side measuring pipe and a second smoke side measuring pipe; the air side measuring pipe consists of a first air side measuring pipe and a second air side measuring pipe;
the measuring point ends of the first smoke side measuring pipe and the second smoke side measuring pipe are respectively positioned in two different radial regions, and the measuring point ends of the first air side measuring pipe and the second air side measuring pipe are respectively positioned in two different radial regions;
the output ends of the smoke side measuring pipe and the air side measuring pipe are connected with a pitot tube.
The utility model discloses still include following technical characteristic:
the output end of the flue gas side measuring pipe penetrates into the rotor along the radial direction and extends out of the lower end face of the rotor vertically; the output end of the air side measuring pipe penetrates into the rotor along the radial direction and extends out of the lower end face of the rotor vertically.
The measuring point ends of the first smoke side measuring tube and the first air side measuring tube form a first circle; and the measuring point ends of the second smoke side measuring pipe and the second air side measuring pipe form a second circle.
The measuring point ends of the first smoke side measuring pipe and the second smoke side measuring pipe are respectively positioned at the radial 3/4 and 1/4 of the air preheater; the measuring point ends of the first air side measuring pipe and the second air side measuring pipe are respectively positioned at 3/4 and 1/4 of the radial direction of the air preheater.
The first smoke side measuring pipe and the first air side measuring pipe are uniformly distributed on the first circle.
The second flue gas side measuring pipe and the second air side measuring pipe are uniformly distributed on a second circle.
The measuring point ends of the first smoke side measuring tube and the second smoke side measuring tube are opposite to the smoke inlet direction; the first air side measuring pipe and the second air side measuring pipe are opposite to the air inlet direction.
The smoke side measuring tube and the air side measuring tube are in threaded connection with the pitot tube.
The pitot tube adopts an integrated pitot tube.
The pitot tube is connected with a controller through a lead.
Compared with the prior art, the utility model, profitable technological effect is:
the utility model discloses in be provided with many flue gas side survey buret and many air side survey buret, survey buret setting on the rotor of air preheater through surveying the flue gas side survey buret and many air side, make a fan-shaped region of a definite flue gas side subregion on each flue gas side survey buret real-time supervision heat accumulator, a fan-shaped region of a definite air side subregion on each air side survey buret real-time supervision heat accumulator, ensured at air preheater operation in-process, each region all can be monitored on the heat accumulator, pass through pitot tube teletransmission outside controller with the data of monitoring again, the controller is selected flue gas side survey buret and is contrasted at the data of flue gas side subregion side collection and confirm whether to have the jam, the controller is selected air side survey buret and is contrasted the data of air side subregion side collection and is confirmed whether to have the jam, and then the inside monitoring device monitoring untimely technical problem of prior art air preheater has been solved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
fig. 3 is a bottom view of the overall structure of the present invention;
fig. 4 is a front view of the overall structure of the present invention;
FIG. 5 is a schematic view of the measurement distribution of the flue gas side measuring tube and the air side measuring tube of the present invention;
fig. 6 is a partially enlarged schematic view of fig. 1.
The meaning of the individual components in the figures is: 1-an air preheater, 2-a smoke side measuring tube, 3-an air side measuring tube and 4-a pitot tube;
101-rotor, 102-heat storage plate;
201-a first flue gas side measuring tube, 202-a second flue gas side measuring tube;
301-a first air side measurement tube, 302-a second air side measurement tube.
The following examples are provided to explain the present invention in further detail.
Detailed Description
It should be noted that all the components of the present invention are known in the art, and the components are not specifically described.
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
The utility model provides a subregion speed sensor of air preheater, as shown in fig. 1-6, including setting up many flue gas side survey burets 2 and many air side survey burets 3 on the rotor 101 of air preheater 1, many flue gas side survey burets 2 set up on the semicircle of air preheater 1 circumference, many air side survey burets 3 set up on the other semicircle of air preheater 1 circumference;
the flue gas side measuring pipe 2 consists of a first flue gas side measuring pipe 201 and a second flue gas side measuring pipe 202; the air-side measuring tube 3 is composed of a first air-side measuring tube 301 and a second air-side measuring tube 302;
the measuring point ends of the first flue gas side measuring tube 201 and the second flue gas side measuring tube 202 are respectively located in two different radial regions, and the measuring point ends of the first air side measuring tube 301 and the second air side measuring tube 302 are respectively located in two different radial regions;
the output ends of the flue gas side measuring tube 2 and the air side measuring tube 3 are both connected with a pitot tube 4.
When the technical scheme is used for carrying out the zoned speed measurement on the air preheater, firstly, the speed field of the air preheater 1 is subjected to cold leveling, after the coal-fired power plant is started, the measuring point data respectively monitored by the smoke side measuring tube 2 and the air side measuring tube 3 are stored as normal flow rate data, then the smoke side measuring tube 2 and the air side measuring tube 3 are adopted for continuous monitoring, the measuring point data of the smoke side measuring tube 2 and the air side measuring tube 3 are collected by the pitot tube in real time, whether blockage exists or not is determined by comparing the normal flow rate data with the measuring point data of the smoke side measuring tube 2 and the air side measuring tube 3, the early blockage of the air preheater can be timely found, the operating personnel can conveniently determine the blockage position of the heat storage plate and clear the blockage early, the risk of blockage of the air preheater is reduced, and the technical problem that the monitoring device in the air preheater in the prior art cannot timely monitor is solved.
Specifically, the output end of the flue gas side measuring tube 2 penetrates into the rotor 101 along the radial direction and vertically extends out of the lower end face of the rotor 101; the outlet end of the air-side measuring tube 3 penetrates the rotor 101 in the radial direction and projects perpendicularly beyond the lower end face of the rotor 101.
Specifically, the measuring point ends of the first flue gas side measuring tube 201 and the first air side measuring tube 301 enclose a first circle; the measurement point ends of the second flue gas side measurement tube 202 and the second air side measurement tube 302 enclose a second circle.
Specifically, the measuring point ends of the first flue gas side measuring tube 201 and the second flue gas side measuring tube 202 are respectively located at the radial 3/4 and 1/4 positions of the air preheater 1; the measuring point ends of the first air side measuring pipe 301 and the second air side measuring pipe 302 are respectively located at 3/4 and 1/4 of the radial direction of the air preheater 1, so that the flow rates of smoke and air in the air preheater 1 can be measured more uniformly.
Specifically, first flue gas side measuring pipe 201 and first air side measuring pipe 301 are evenly distributed on the first circle, and can be more even measure the velocity of flow of the inside flue gas of air preheater 1 and air.
Specifically, the second flue gas side measuring tube 202 and the second air side measuring tube 302 are uniformly distributed on the second circle, so that the flow rates of the flue gas and the air inside the air preheater 1 can be measured more uniformly.
Specifically, the measuring point ends of the first flue gas side measuring tube 201 and the second flue gas side measuring tube 202 are opposite to the flue gas inlet direction; the first air side measuring tube 301 and the second air side measuring tube 302 are just opposite to the air intake direction, ensuring more accurate measurement of the flow rate of the flue gas and the air.
Specifically, the smoke side measuring pipe 2 and the air side measuring pipe 3 are in threaded connection with the pitot tube 4, and the installation and the disassembly are convenient.
In particular, the pitot tube 4 is an integrated pitot tube.
Specifically, the pitot tube 4 is connected with a controller through a wire.
In the technical scheme, the pitot tube transmits collected measuring point data to the controller, the controller selects measuring point flow speed data of the flue gas side measuring tube in a flue gas side partition zone to be compared with normal flow speed data, the controller selects measuring point flow speed data of the air side measuring tube in an air side partition zone to be compared with normal flow speed data, when the flow speed data of a certain measuring point is lower than the corresponding normal flow speed data, the fact that a fan-shaped zone of a certain heat storage plate is just blocked is indicated, at the moment, the controller generates an early warning signal, on one hand, information of suspected blockage of the heat storage plate partition zone is prompted to operating personnel, on the other hand, the ash removal frequency of the ash removal device of the air preheater to the fan-shaped zone is controlled, through monitoring the change of the flow speed data of the measuring point, early blockage of the air preheater can be timely found, the operating personnel can conveniently determine the blockage position of the heat storage plate and clear the blockage early, and the risk of blockage of the air preheater is reduced.
Claims (10)
1. The device for measuring the speed of the air preheater in the partitioned mode is characterized by comprising a plurality of smoke side measuring pipes (2) and a plurality of air side measuring pipes (3) which are arranged on a rotor (101) of an air preheater (1), wherein the smoke side measuring pipes (2) are arranged on a semicircle in the circumferential direction of the air preheater (1), and the air side measuring pipes (3) are arranged on the other semicircle in the circumferential direction of the air preheater (1);
the smoke side measuring pipe (2) consists of a first smoke side measuring pipe (201) and a second smoke side measuring pipe (202); the air side measuring pipe (3) consists of a first air side measuring pipe (301) and a second air side measuring pipe (302);
the measuring point ends of the first smoke side measuring pipe (201) and the second smoke side measuring pipe (202) are respectively positioned in two different radial regions, and the measuring point ends of the first air side measuring pipe (301) and the second air side measuring pipe (302) are respectively positioned in two different radial regions;
the output ends of the smoke side measuring pipe (2) and the air side measuring pipe (3) are connected with a pitot tube (4).
2. A device for measuring the speed of an air preheater according to claim 1, wherein the output end of the flue gas side measuring tube (2) radially penetrates into the rotor (101) and vertically extends out of the lower end surface of the rotor (101); the output end of the air side measuring pipe (3) penetrates into the rotor (101) along the radial direction and vertically extends out of the lower end face of the rotor (101).
3. The device for measuring the velocity of a section of an air preheater as claimed in claim 1, wherein the measuring point ends of the first flue gas side measuring tube (201) and the first air side measuring tube (301) enclose a first circle; the measuring point ends of the second smoke side measuring pipe (202) and the second air side measuring pipe (302) enclose a second circle.
4. The device for measuring the velocity of zones of an air preheater as claimed in claim 1 or 3, wherein the measuring point ends of the first flue gas side measuring tube (201) and the second flue gas side measuring tube (202) are respectively located at 3/4 and 1/4 of the radial direction of the air preheater (1); the measuring point ends of the first air side measuring pipe (301) and the second air side measuring pipe (302) are respectively positioned at 3/4 and 1/4 of the radial direction of the air preheater (1).
5. A device for measuring velocity of area of air preheater as claimed in claim 3, wherein said first flue gas side measuring tube (201) and said first air side measuring tube (301) are uniformly distributed on a first circle.
6. The device for measuring the velocity of a section of an air preheater of claim 3, wherein the second flue gas side measuring tube (202) and the second air side measuring tube (302) are uniformly distributed on the second circle.
7. The device for measuring the speed of a partition of an air preheater as claimed in claim 1 or 3, wherein the measuring point ends of the first flue gas side measuring tube (201) and the second flue gas side measuring tube (202) are opposite to the flue gas inlet direction; the first air side measuring pipe (301) and the second air side measuring pipe (302) are opposite to the air inlet direction.
8. The device for measuring the speed of a partition of an air preheater as claimed in claim 1, wherein the flue gas side measuring tube (2) and the air side measuring tube (3) are screwed with the pitot tube (4).
9. The device for measuring the speed of a partition of an air preheater as claimed in claim 1, wherein the pitot tube (4) is an integrated pitot tube.
10. The device for measuring the speed of the subarea of the air preheater according to claim 1, wherein the Pitot tube (4) is connected with a controller through a wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222270146.0U CN218601308U (en) | 2022-08-26 | 2022-08-26 | Subregion speed sensor of air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222270146.0U CN218601308U (en) | 2022-08-26 | 2022-08-26 | Subregion speed sensor of air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218601308U true CN218601308U (en) | 2023-03-10 |
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ID=85398842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222270146.0U Active CN218601308U (en) | 2022-08-26 | 2022-08-26 | Subregion speed sensor of air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218601308U (en) |
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2022
- 2022-08-26 CN CN202222270146.0U patent/CN218601308U/en active Active
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