JPS63111207A - Turbine clogging monitor - Google Patents

Abstract

PURPOSE:To enable the state of clogging to be observed accurately by allowing to give an alarm for the state of clogging when the ratio between the output power of a generator, which is calculated from the gas pressure at the inlet and outlet of a turbine, the gas temperature at the inlet of the turbine, and the stationary blade angle, and the detected output power of the generator is not more than an allowable value. CONSTITUTION:There are provided a pressure transmitter 11 and a temperature transmitter 12 for respectively detecting the pressure P1 and the temperature T1 of the blast furnace gas which is discharged from a blast furnace 24 and subjected to the dust removing in a dust collector 25 before it is supplied to a turbine 2, an opening transmitter 13 for detecting the stationary blade opening theta, a power transmitter 14 for detecting the output power W of a generator 3, and a second pressure transmitter 15 for detecting the turbine outlet pressure P2. The output signals from these transmitters are inputted to a computing element 20, where the output power WN of the generator 3, which is equivalent to a clean state, is calculated from the signals theta, P1, P2 and T1, and then, a ratio eta (W=WN) of the above obtained value to the value W of the inputted power is calculated. And further, when said ratio eta is not more than an allowable value, a clogging alarm signal is generated and an alarm unit 21 is actuated.

Description

TECHNICAL FIELD The present invention relates to a turbine clogging fLm device for turbine generator 7jL equipment, particularly top pressure turbine power generation equipment.

BACKGROUND TECHNOLOGY Furnace top pressure turbine power generation equipment guides blast furnace gas discharged from a blast furnace to a turbine and uses this turbine to drive a generator, thereby recovering the energy contained in the blast furnace gas as electricity and making effective use of it. It is.

In such furnace top pressure turbine generator 71 equipment, a dust removal device is installed upstream of the turbine to prevent trouble from occurring in the turbine due to the large amount of dust contained in the blast furnace gas. Although they are cleaned and used, gas still adheres to the turbine blades, causing various problems such as clogging.

By the way, the state of dust adhesion to turbine blades is as follows.
It differs depending on the dust removal device.

In other words, in the case of conventional wet dust removal equipment that uses water, dust adhesion mainly occurs on the first stage stationary blades, but in recent years, dust has been increasing in the type of dust removal using turbines. When using the newly introduced dry type dust removal equipment, or even when switching between the wet and dry types and using them together, gas Y adhesion will occur under the same conditions not only on the first stage stator vane but on all stages of the turbine blades. I will do it.

In addition, when the dust removal system is switched between dry and wet methods, the operating point of the turbine changes, especially the turbine inlet gas temperature and gas width, so this temperature change cannot be ignored by the turbine clogging monitoring system. It has become something that does not exist.

A turbine clogging monitoring device for the purpose of detecting the adhesion of dust on turbine blades is disclosed in, for example, Japanese Patent Application Laid-Open No. 61-35001. By quantitatively prompting t1n, dust attached to the first stage stationary blade is indirectly detected.

The invention should solve the problem m, α. In such prior art, simply the first stage wing with gas F Cm
However, when a dry type dust removal device is used as mentioned above, it is possible to detect dust adhesion on the turbine blades and compensate for changes in turbine inlet gas temperature due to switching of the dust removal device. There is a growing need for something that can be done.

The purpose of the present invention is to detect dust adhesion not only on the first stage ry blade but also on all stages of the turbine blade, and also to detect the turbine inlet gas temperature.
It is an object of the present invention to provide a turbine clogging monitoring device that can adapt to changes in turbine inlet gas temperature due to switching of dust removal devices, etc.

Means for Solving the Problems The present invention provides a turbine clogging monitoring device for turbine power generation equipment, which includes: a power transmitter that detects the power generated by the generator and outputs the value W of the power; An opening transmitter that detects the blade angle value θ and outputs the value θ of the blade angle, and an opening transmitter that detects the gas pressure in front of the first stage stationary blade of the turbine and outputs the value P1.
A first pressure transmitter that outputs the temperature, a temperature transmitter that detects the large temperature in front of the first stage J blade of the turbine and outputs the value T1, and a temperature transmitter that detects the gas pressure at the outlet of the turbine and outputs the value P2. A second pressure transmitter that outputs the power W1, stator blade angle θ, turbine inlet gas pressure P1, turbine inlet large temperature T1, and turbine outlet gas pressure P2 outputted from each of the above transmitters are input, Among these, the power generation (Shige's power WN) corresponding to a clean state is calculated from each of the stator blade angle θ, turbine inlet gas pressure P1, turbine inlet gas temperature T1, and turbine outlet gas pressure P2, and the input power value W and the calculated electric power WN (=W/WN), and outputs a clogging alarm signal when the value of the ratio η becomes less than or equal to a predetermined allowable value; This is a turbine clogging monitoring device for a turbine power generation facility, characterized by including an alarm device that issues an alarm in response to a clogging alarm signal output from the computing unit.

The present invention also provides a turbine clogging monitoring device for a turbine power generation facility, which includes: a power transmitter that detects the electric power generated by the generator and outputs the value W of the electric power; and a power transmitter that detects the angle of the first stage wing; An opening transmitter outputs the angle value θ, detects the gas pressure in front of the 1st and 2nd blades of the turbine, and outputs the value P.
A pressure transmitter that outputs 1 and detects the large temperature of the first stage silent blade curve of the turbine, and outputs the value T1.
a temperature transmitter that outputs the power W outputted from each of the transmitters, the blade angle θ, the turbine inlet gas pressure P1, and the turbine inlet gas temperature T1.
, and the predetermined turbine outlet gas pressure P2, calculate the power WN of the generator corresponding to the clean state, and calculate the ratio 1 (= W/WN) and outputs a clogging alarm signal when the value of this ratio falls below a predetermined allowable value; This is a turbine clogging monitoring device for turbine power generation equipment, characterized in that it includes a deafening device that issues an alarm.

According to the present invention, the electric power WN of the generator in the clean state is calculated based on the detection results of the I5 blade angle θ, the turbine inlet gas pressure P1, the turbine inlet gas temperature P1, and the turbine outlet gas pressure P2. It can be calculated by using a characteristic function. Dust adhesion can be detected by comparing the ratio 1 between the power WN during cleaning and the actually detected power value W with a predetermined tolerance.

Thus, based on the change in power caused by the generator,
It becomes possible to detect a decrease in turbine efficiency and a decrease in gas flow rate passing through the turbine due to dust adhesion on the turbine blades.

Further, in the present invention, the turbine outlet gas pressure P2 has extremely small fluctuations and can be kept at a constant value. Therefore, it is also possible to use the turbine outlet gas pressure P2 as a predetermined value to calculate the electric power WN of the generator at the time of cleaning described above, without actually measuring it.

Embodiment An embodiment of the present invention will be described based on the drawings. Figure 1 shows
1 is a system diagram showing a turbine clogging monitoring device according to an embodiment of the present invention. In FIG. 1, blast furnace gas discharged from a blast furnace 24 is supplied to a turbine 2 via a duct 1 after removing dust in a removal rI 125. The turbine 2 drives a generator 3 serving as a load, and converts the energy contained in the blast furnace gas from which dust has been removed into electric power. Further, the blast furnace gas that has passed through the turbine 2 is discharged to a downstream process (not shown) via a turbine outlet log 4.

The first-stage silent blade of the turbine 2 has a flexible f4JJ rock structure, and its blade angle can be adjusted from the outside using a hydraulic cylinder 5.

Here, the turbine inlet gas pressure P1 is converted into an electrical signal by the fRl pressure transmitter 11 attached to the duct 1, and transmitted to the computing unit 20 via the line 7911. Similarly, the turbine inlet gas temperature T1 is
The blade angle θ is converted into an electrical signal by the temperature generator (i) 12 attached to the controller 12, and sent to the calculator 20 via the line 12. The power W of the generator is converted into an electric signal and sent via the line 13 to the generator 20, which is transmitted to the power transmitter 1.
The turbine outlet pressure P2 is converted into an electric signal by t and sent to the computing unit 20 via the line 714, and then sent to the second pressure transmitter 15 attached to the turbine outlet log 4.
It is converted into an electrical signal by the line! 15 to the arithmetic unit 20.

In the arithmetic unit 20, the line 11. ．． I! 12°!
13. After inputting the electrical signals transmitted via lines 14 and /15 and performing the calculations described below, a clogging alarm signal is transmitted to the alarm 21 via line 21, and at the same time the ratio described below is calculated. is transmitted to the recorder 22 via the line 22 as an electrical signal.

Next, calculations inside the calculator 20 will be explained. Referring also to FIG. 2, in the computing unit 20, first, in step n1, the turbine input gas pressure P1 is
, the turbine input gas temperature T1, the turbine output gas pressure, and the OR angle θ are input, and from each of these, in step n2, the power WN of the generator at the time of cleanliness at each of these operating points is calculated using the following formula (1). .

WN=F(I) 1 , T 1 , P 2. θ) ・
(1) Here, the function F (I'l, TI, P2.θ) is a characteristic function determined by design data and actual values of the turbine power generation equipment.

Next, the power W of the generator input at that point,
Step! ]3 and calculate using the following formula (2).

v=W/WN (2) Thus, the ratio η obtained by the above calculation is calculated in step n4.
At the same time, the value of l is output to the recorder 22 via the line 22, and at the same time, in step n5, the value of l is compared with a preset value α given as a limit that allows the operation of the turbine in consideration of the characteristics of the turbine. , η becomes α, 1, 2 is sent via line 721 to step n.
6 to output to the alarm 21.

In the arithmetic unit 20, the above calculation is performed.

As shown in the above calculation procedure, in the calculation unit 2o,
The power W of the generator is the power W corresponding to the same operating point during cleaning.
Compared to N, since it outputs a clogging alarm signal, dust adhesion on the turbine blades of the inaru stage causes a decrease in turbine efficiency and a decrease in the flow rate of gas passing through the upstream turbine, which means a decrease in power generation. It can be detected as

In addition, even if you are concerned about the characteristics of turbine power generation equipment, the loss temperature at the turbine input is taken into account, so dust removal VCR! dry type of i,
This is sufficient for changing sides between wet types.

By the way, the turbine outlet gas pressure P2 of the turbine is determined by the piping resistance of the duct 4 and the process located downstream of the turbine, and the pressure P2
The variation in is typically a very small value.

In this way, when fluctuations in the turbine outlet gas pressure are negligible or are controlled to a certain constant value, it is necessary to actually detect and input the signal of the turbine outlet gas pressure P2 to the arithmetic unit 2o. It is clear that there is no.

That is, in the other embodiment shown in FIG. 3, the signals transmitted to the computing unit 20 are based on the turbine inlet gas pressure P1,
All you need is the turbine input loss temperature T1, the DB angle θ, and the power W of the generator, and at this time, the turbine outlet gas pressure P2
are stored and set in advance in step 3320.

The power generation (WN) when clean can be calculated using the equation (1) above.As a result, the r
Compared to the embodiment, it is possible to realize a turbine clogging monitoring device having approximately the same level of performance with a simpler configuration.

In the above description, all the calculations of the turbine clogging monitoring device were performed by the computer, but functions equivalent to the present invention may be realized by combining a plurality of instrumentation devices.

Effects As explained above, according to the turbine clogging monitoring device according to the present invention, the state of dust adhesion on all stages of turbine blades, not just the first-stage silent blades, can be monitored. Even when used by switching between opening and closing, monitoring can be performed in accordance with the temperature of the gas supplied from each dust removal device.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing an embodiment of the present invention, tjS2 chart is a diagram 7a showing operations in the operator fr, and 'jS
FIG. 3 is a system diagram showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Gucht 1.2... Turbine, 3... Generator, 4... Turbine outlet duct, 5... Hydraulic cylinder, 11... Pressure transmitter, 12... Temperature light ( i device, 1
3...Opening degree transmitter, 14...Power transmitter, 15...
・Pressure transmitter, 20... Arithmetic unit, 21... Alarm device,
22...Recorder agent Patent attorney Shikyo Keibu Figure 2

Claims (2)

[Claims] (1) A turbine clogging monitoring device for turbine power generation equipment includes a power transmitter that detects the electric power generated by the generator and outputs the value W of the electric power, and a power transmitter that detects the angle of the first stage stationary blade and outputs the value θ of the blade angle. A position transmitter that outputs
A first pressure transmitter that outputs
a second pressure transmitter that detects the gas pressure at the outlet of the turbine and outputs its value P2; and the power W output from each of the transmitters, the stator blade angle θ, and the turbine inlet. Input each value of gas pressure P1, turbine inlet gas temperature T1, and turbine outlet gas pressure P2, and calculate from each value of stator blade angle θ, turbine inlet gas pressure P1, turbine inlet gas temperature T1, and turbine outlet gas pressure P2. In addition to calculating the power WN of the generator corresponding to a clean state, the input power value W and the calculated power W are calculated.
A computing unit that calculates the ratio η (=W/WN) with N and outputs a clogging alarm signal when the value of this ratio η falls below a pre-given tolerance value; A turbine clogging monitoring device for a turbine power generation facility, comprising: an alarm that issues an alarm in response to a clogging alarm signal. (2) A turbine clogging monitoring device for turbine power generation equipment includes a power transmitter that detects the electric power generated by the generator and outputs the value W of the electric power, and a power transmitter that detects the angle of the first stage stationary blade and outputs the value θ of the blade angle. A position transmitter that outputs
A pressure transmitter that outputs
a temperature transmitter that outputs the power W output from each of the transmitters, the stator blade angle θ, the turbine inlet gas pressure P1, and the turbine inlet gas temperature T1.
, and from each value of the turbine outlet gas pressure P2 determined in advance, calculate the power WN of the generator corresponding to a clean state, and the ratio of the input power value W to the power WN obtained by the calculation. A computing unit that calculates η (=W/WN) and outputs a clogging alarm signal when the value of this ratio η falls below a pre-given tolerance value; and a clogging alarm signal that is output from this computing unit. 1. A turbine clogging monitoring device for a turbine power generation facility, comprising: an alarm that issues an alarm in response to the above.