CN103940487A - Rapid detection method of water level variation equivalent of deaerator - Google Patents
Rapid detection method of water level variation equivalent of deaerator Download PDFInfo
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- CN103940487A CN103940487A CN201410199850.9A CN201410199850A CN103940487A CN 103940487 A CN103940487 A CN 103940487A CN 201410199850 A CN201410199850 A CN 201410199850A CN 103940487 A CN103940487 A CN 103940487A
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- oxygen
- eliminating device
- deaerator
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- rice
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention relates to a rapid detection method of a water level variation equivalent of a deaerator. The method includes the steps that the total length of a deaerator barrel, the length of a cylinder of a straight-pipe section of the deaerator, the radius of the cylinder of the straight-pipe section of the deaerator, the diameter of the deaerator and the height of the liquid level in the deaerator are measured; the area of the liquid level in the deaerator and the water level variation equivalent of the deaerator are calculated through formulas. The detection method is suitable for various sizes of deaerators of different power stations, is rapid and visual, saves time, is suitable for field detection, and can increase the detection efficiency easily. The method gives consideration to water level variations in the cylinder of the straight-pipe section and also gives consideration to variations of the water level of a deaerator end, thereby being more accurate in detection value.
Description
Technical field
The present invention relates to the detection method that a kind of deaerator level changes equivalent.
Background technology
ASME PTC-2004 regulation, when the not clear leakage rate of pilot system can not surpass at full capacity 0.1% of main steam flow, but because the not clear leakage rate of system is larger on the impact of test findings, when implementing thermal performance test isolation of system, should be rigid in checking up as much as possible, to meet the requirement of rules regulation.
Not clear leakage rate shows following two aspects to the impact of test findings: the one, and the impact of unit heat consumption rate.The not clear leakage of boiler side is more, and main steam flow is less, and reheated steam flow is also less, and heat consumption rate is just lower, more favourable to reaching makers' guarantee value; The 2nd, the impact on low pressure (LP) cylinder efficiency.According to calculation in quantity analysis, not clear leakage rate is larger on the impact of low pressure (LP) cylinder efficiency than not clear leakage rate on the impact of heat consumption rate.In experimentation, deaerator level difference in change, up to 150mm, is amounted to equivalent variable quantity 15t/h, because oxygen-eliminating device matter and energy all participates in calculating, larger on system material balance and energy equilibrium impact.Therefore, need to provide a kind of method that can detect not clear leakage rate.
Summary of the invention
The object of the present invention is to provide a kind of method easy, detect reliable deaerator level and change and work as quantity measuring method, the method according to this invention can further confirm that thermodynamic system of steam tur fails to understand slip, instruct controlling test and malfunction elimination, guarantee that test meets ASME standard, improves test progress.
Technical scheme of the present invention is as follows:
Detection method of the present invention comprises the steps:
Step 1: measure liquid level (h) in oxygen-eliminating device cylindrical shell overall length (L), oxygen-eliminating device straight length cylinder length (L1), oxygen-eliminating device straight length right cylinder radius (r), oxygen-eliminating device diameter (d) and oxygen-eliminating device;
Step 2: by formula (1) ~ (6), calculate liquid level area (S) in oxygen-eliminating device,
（1）
（2）
（3）
（4）
（5）
（6）
Wherein L is oxygen-eliminating device cylindrical shell overall length, and unit is rice;
L1 is oxygen-eliminating device straight length cylinder length, and unit is rice;
R is oxygen-eliminating device straight length right cylinder radius, and unit is rice;
H is liquid level in oxygen-eliminating device, and unit is rice;
S is liquid level area in oxygen-eliminating device, and unit is square metre;
Step 3: the deaerator level calculating in detection time according to formula (7) changes equivalent (V)
（7）
Wherein V is that deaerator level changes equivalent, and unit is cubic meter;
S is liquid level area in oxygen-eliminating device, and unit is square metre;
D is oxygen-eliminating device diameter, and unit is rice;
H is liquid level in oxygen-eliminating device, and unit is rice;
H
1initial water level during for detection, unit is rice;
H
2end water level during for detection, unit is rice;
ρ is water-mass density, and unit is every kilogram of cubic meter.
Beneficial effect of the present invention is:
Detection method of the present invention is applicable to the oxygen-eliminating device of the various different sizes in different generating plant, and method is fast directly perceived, saves time, and is applicable to Site Detection, is conducive to improve detection efficiency; Method of the present invention has considered the SEA LEVEL VARIATION in straight length right cylinder, also considered the variation of oxygen-eliminating device termination water level, so detected value is more accurate.
Accompanying drawing explanation
Fig. 1 is Deaerator Structure schematic diagram;
In the accompanying drawings, liquid level, d oxygen-eliminating device diameter in 1 oxygen-eliminating device, 1-1 oxygen-eliminating device straight length right cylinder, 1-2 oxygen-eliminating device termination, L oxygen-eliminating device cylindrical shell overall length, L1 oxygen-eliminating device straight length cylinder length, r oxygen-eliminating device straight length right cylinder radius, h oxygen-eliminating device.
Embodiment
Embodiment 1
Detect the generous dynamo-electric company limited in Wuhan, horizontal built-in deaerator.
As shown in Figure 1, it comprises oxygen-eliminating device straight length right cylinder 1-1 and the oxygen-eliminating device termination 1-2 that is arranged at oxygen-eliminating device straight length right cylinder two ends to the structural representation of oxygen-eliminating device 1.The oxygen-eliminating device cylindrical shell overall length L that has calculated oxygen-eliminating device 1 is 29.876 meters, and oxygen-eliminating device straight length cylinder length L1 is 27.84 meters, and oxygen-eliminating device straight length right cylinder radius r is 1.9 meters, and in oxygen-eliminating device, liquid level h is 2.107 meters, and oxygen-eliminating device diameter d is 3.8 meters.According to formula (1) ~ (6), calculating liquid level area S in oxygen-eliminating device is 109.36 square metres.
（1）
（2）
（3）
（4）
（5）
（6）
Wherein L is oxygen-eliminating device cylindrical shell overall length, and unit is rice;
L1 is oxygen-eliminating device straight length cylinder length, and unit is rice;
R is oxygen-eliminating device straight length right cylinder radius, and unit is rice;
H is liquid level in oxygen-eliminating device, and unit is rice;
S is liquid level area in oxygen-eliminating device, and unit is square metre;
The deaerator level variation equivalent V calculating in detection time according to formula (7) is 20.327 cubic metres.
（7）
Wherein V is that deaerator level changes equivalent, and unit is cubic meter;
S is liquid level area in oxygen-eliminating device, and unit is square metre;
D is oxygen-eliminating device diameter, and unit is rice;
H is liquid level in oxygen-eliminating device, and unit is rice;
H
1initial water level during for detection, unit is rice;
H
2end water level during for detection, unit is rice;
ρ is water-mass density, and unit is every kilogram of cubic meter.
According to above-mentioned calculating, it is 20.327 cubic metres that deaerator level changes equivalent, and not clear leakage rate is 18019.58 kilograms.Illustrate that this deaerator level changes the on-the-spot easily enforcement of method for quick of equivalent, algorithm science, the method according to this invention can further confirm that thermodynamic system of steam tur fails to understand slip, instructs controlling test and malfunction elimination, guarantee that test meets ASME standard, improves test progress.
Claims (1)
1. deaerator level changes a method for quick for equivalent, it is characterized in that comprising the steps:
Step 1: measure liquid level (h) in oxygen-eliminating device cylindrical shell overall length (L), oxygen-eliminating device straight length cylinder length (L1), oxygen-eliminating device straight length right cylinder radius (r), oxygen-eliminating device diameter (d) and oxygen-eliminating device;
Step 2: by formula (1) ~ (6), calculate liquid level area (S) in oxygen-eliminating device,
（1）
（2）
（3）
（4）
（5）
（6）
Wherein L is oxygen-eliminating device cylindrical shell overall length, and unit is rice;
L1 is oxygen-eliminating device straight length cylinder length, and unit is rice;
R is oxygen-eliminating device straight length right cylinder radius, and unit is rice;
H is liquid level in oxygen-eliminating device, and unit is rice;
S is liquid level area in oxygen-eliminating device, and unit is square metre;
Step 3: the deaerator level calculating in detection time according to formula (7) changes equivalent (V)
（7）
Wherein V is that deaerator level changes equivalent, and unit is cubic meter;
S is liquid level area in oxygen-eliminating device, and unit is square metre;
D is oxygen-eliminating device diameter, and unit is rice;
H is liquid level in oxygen-eliminating device, and unit is rice;
H
1initial water level during for detection, unit is rice;
H
2end water level during for detection, unit is rice;
ρ is water-mass density, and unit is every kilogram of cubic meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199850.9A CN103940487A (en) | 2014-05-13 | 2014-05-13 | Rapid detection method of water level variation equivalent of deaerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410199850.9A CN103940487A (en) | 2014-05-13 | 2014-05-13 | Rapid detection method of water level variation equivalent of deaerator |
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| CN103940487A true CN103940487A (en) | 2014-07-23 |
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| CN201410199850.9A Pending CN103940487A (en) | 2014-05-13 | 2014-05-13 | Rapid detection method of water level variation equivalent of deaerator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI70325B (en) * | 1984-11-29 | 1986-02-28 | Vapo Oy | FOERFARANDE OCH ANORDNING FOER MAETNING AV VOLYMEN AV EN STACK |
| CN2118296U (en) * | 1992-04-18 | 1992-10-07 | 黄振球 | Measuring disk for horizontal accumulating conveying tank |
| CN101532820A (en) * | 2009-04-23 | 2009-09-16 | 北京光电技术研究所 | Volumetric measurement method and measurement device of horizontal metal can |
-
2014
- 2014-05-13 CN CN201410199850.9A patent/CN103940487A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI70325B (en) * | 1984-11-29 | 1986-02-28 | Vapo Oy | FOERFARANDE OCH ANORDNING FOER MAETNING AV VOLYMEN AV EN STACK |
| CN2118296U (en) * | 1992-04-18 | 1992-10-07 | 黄振球 | Measuring disk for horizontal accumulating conveying tank |
| CN101532820A (en) * | 2009-04-23 | 2009-09-16 | 北京光电技术研究所 | Volumetric measurement method and measurement device of horizontal metal can |
Non-Patent Citations (2)
| Title |
|---|
| 张俊宏 等: "PET装置中椭圆形封头卧式容器的液位-体积计算", 《聚酯工业》 * |
| 张俊宏 等: "工业装置中旋压封头卧式和立式容器内液位－体积关系求解方法", 《北京建筑工程学院学报》 * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140723 |
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| RJ01 | Rejection of invention patent application after publication |