JP3868304B2 - Operation management system of ash melting furnace - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation management system for an ash melting furnace that melts ash at a high temperature into slag.
[0002]
[Prior art]
Incinerated ash (powder mineral) such as sewage sludge, municipal waste, industrial waste, etc. is further melted in an ash melting furnace and taken out as slag in order to recycle, reduce volume, and render it harmless. . In order to stably take out the slag, it is preferable to measure the temperature of the slag in the furnace and perform automatic operation so that the temperature of the slag becomes constant.
[0003]
However, the temperature of the slag is very high (thousands of degrees C), and the slag thermometer that measures the temperature of the slag itself does not operate stably over a long period of time. Therefore, when the automatic operation is performed based on the data of the slag thermometer, the actual slag temperature is not constant and the ash cannot be stably melted. Therefore, establishment of an operation management system for an ash melting furnace based on the actual situation of such a slag thermometer that is not stable for a long time is desired.
[0004]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide an operation management system for an ash melting furnace based on the actual state of a slag thermometer.
[0005]
[Means for Solving the Problems]
According to invention of Claim 1, it is the operation management system of the ash melting furnace which fuse | melts ash to make slag,
A slag thermometer that measures the slag temperature in the furnace;
The slag flow rate measured by the slag flow rate measuring device, the slag suspended length measured by the slag suspended length measuring device, the elevated slag temperature measured by the elevated slag thermometer, and the refractory of the ash melting furnace measured by the furnace wall thermometer The temperature, the temperature of the cooling water flowing through the water jacket formed in the wall of the ash melting furnace measured by the furnace wall cooling water thermometer, the water flowing through the water jacket formed in the tank measured by the soot cooling water thermometer temperature of the cooling water, or any of the temperature of the water in the slag flows in a water bath slag slag flowing aquarium thermometer exits the trough for slag discharge were measured flows, in response to the slag temperature changes At least one indirect parameter measuring means for measuring as an indirect parameter,
Anda judging means for judging whether the slag temperature and the indirect parameter relationship in the region of a normal case obtained in advance,
When in the region of the normal case where the relationship between the indirect parameters and the slag temperature is obtained in advance performs automatic operation based on the slag temperature,
Wherein when the relationship between the slag temperature and the indirect parameter is not in the region of a normal case obtained in advance, operation management system according to claim Rukoto that Hassu an alarm is provided.
[0006]
According to the invention of claim 2, in the invention of claim 1, further comprising: a furnace gas thermometer for measuring the furnace gas temperature existing in the slag above,
Anda judging means for judging whether or not in the region where the relationship between the indirect parameters and the furnace gas temperature is normal previously obtained,
After having issued the alarm, when said slag thermometer is determined to be abnormal is to abort the automatic operation based on the slag temperature, for automatic operation based on the furnace gas temperature,
If the relationship between the indirect parameters and the furnace gas temperature is not in the region of a normal case obtained in advance, the operation management system for issuing an alarm is provided.
[0007]
According to the invention of claim 3, in the invention of claim 1 or 2, the number of indirect parameter measuring means is plural,
If the number of indirect parameters that are no longer in a normal correspondence with the slag temperature is greater than a predetermined value, or the total number of indirect parameters that are no longer in a normal correspondence with the slag temperature. An operation management system is provided that determines that the cause of the loss of the normal correspondence relationship is the slag thermometer when the ratio to the number is greater than a predetermined value .
[0008]
According to the invention of claim 4, in the invention of claim 2 , the number of indirect parameter measuring means is plural,
The number of the indirect parameters that are no longer normal relationship with the furnace gas temperature is, if larger than a predetermined value, or that are no longer normal relationship with the furnace gas temperature If the percentage of the number of the total number of indirect parameter is greater than the predetermined value, provided that the operation management system determines that there is no longer cause in normal relationship to the furnace gas thermometer Is done.
[0009]
According to the invention of claim 5, in the invention of claim 4 , when the number of the indirect parameters that are no longer in a normal correspondence with the slag temperature is greater than a predetermined value, or the slag temperature When the ratio of the number of indirect parameters that are no longer in a normal correspondence relationship to the total number is greater than a predetermined value, it is determined that the cause of the loss of the normal correspondence is in the slag thermometer An operation management system is provided.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a temperature management system for a plasma ash melting furnace according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a diagram showing a hardware configuration thereof.
The plasma ash melting furnace 1 has a furnace body 3 and an upper lid member 4 formed in a bottomed cylindrical shape with a refractory material such as brick, and the left side wall of the furnace body 3 in the figure is sewage sludge, municipal waste, industrial waste An injecting port 5 for injecting incineration ash such as a material is provided at the lower part of the right side wall in the drawing, and an exhausting port 6 for extracting molten slag and gas is provided.
[0011]
A main electrode 7 connected to a DC power supply (not shown) is disposed at the center of the upper lid member 4, and a furnace bottom electrode 8 is disposed at the bottom center of the furnace body 3. Nitrogen gas is supplied to the main electrode 7 from a nitrogen gas supply device (not shown), plasma discharge is performed between the main electrode 7 and the furnace bottom electrode 8, and the ash charged into the furnace body 3 is melted. The slag generated by melting the ash flows through the trough 9 and flows into the slag inflow water tank 10.
[0012]
The slag thermometer 20 measures the slag temperature TS in the furnace. For example, a so-called dichroic temperature is obtained by using a pyroelectric element to obtain the temperature from the energy ratio of two wavelengths of light emitted by the slag. It is considered as a total. The temperature signal of the slag temperature TS measured by the slag thermometer 20 is sent to the control circuit 200 in the operation management room (DCS), and further displayed on the display surface 310 of the display panel 300 via the control circuit 200.
[0013]
The in-furnace gas thermometer 30 is for measuring the in- furnace gas temperature TG existing above the slag in the furnace, and is usually measured by inserting a thermocouple with a protective tube into the furnace. Similarly, the temperature signal of the in- furnace gas temperature TG measured by the in- furnace gas thermometer 30 is also sent to the control circuit 200 in the operation management room (DCS), and further to the display surface 310 of the display panel 300 via the control circuit 200. Is displayed.
This in-furnace gas thermometer 30 is used in the second embodiment.
[0014]
The slag flow velocity measuring device 40 is composed of, for example, an infrared camera, photographs the slag flowing through the ridge 9, and obtains the slag flow velocity VS from the image. The slag image signal photographed by the slag flow velocity measuring device 40 is sent to the control circuit 200, which performs image processing to obtain the slag flow velocity VS, and the result is displayed on the display surface 310 of the display panel 300. .
[0015]
The slag suspended object length measuring device 50 is also composed of an infrared camera, for example, and measures the slag suspended object length LS that hangs in an icicle shape from the tip of the ridge 9. The image signal of the slag hanging object photographed by the hanging object measuring instrument 50 is sent to the control circuit 200 in the operation control room (DCS), and the control circuit 200 obtains the slag hanging object length LS by performing image processing. Is displayed on the display surface 310 of the display panel 300.
[0016]
The soot slag thermometer 55 is composed of a two-color thermometer similar to the slag thermometer 20 (however, the wavelength range to be used is different because there is no influence of soot dust), and in the middle of or after the slag discharge soot 9 The slag temperature TT is detected, and the temperature signal is sent to the control circuit 200 for processing and displayed on the display surface 310 of the display plate 300.
[0017]
The ash covering area measuring device 60 is also composed of an infrared camera and takes an image of the upper surface of the slag in the furnace, and the image signal is sent to the control circuit 200 for processing to cover the display surface 310 of the display panel 300 with the upper surface of the slag. The ash area is shown.
[0018]
The furnace wall thermometer 70 detects the temperature TW1 of the refractory 16 that is glued to the outside of the refractory brick 1a constituting the wall of the ash melting furnace 1, and the temperature signal is sent to the control circuit 200 for processing. And displayed on the display surface 310 of the display panel 300.
[0019]
The furnace wall cooling water thermometer 80 detects the temperature TW2 of the cooling water flowing through the water jacket 81 formed in the wall of the ash melting furnace 1, and the temperature signal is sent to the control circuit 200 for processing and display panel 300. Are displayed on the display surface 310.
[0020]
樋 Cooling water thermometer 90 detects the temperature TW3 of the cooling water flowing through the water jacket 91 formed in the bag 9, and the temperature signal is sent to the control circuit for processing and display on the display board 300 in the operation management room. Displayed on surface 310.
[0021]
The slag inflow water tank thermometer 100 detects the temperature TW4 of the water in the water tank 101 into which the slag discharged from the slag discharge tank 9 flows, and the temperature signal is sent to the control circuit 200 to be processed and displayed on the display panel 300. Displayed on surface 310.
[0022]
Further, the most important function of the control circuit 200 is to control the input power Q with respect to the ash input amount A so that the slag temperature TS becomes constant. The measured values of the in-furnace gas thermometer 30 and other indirect parameter measuring means are converted and sent to the display panel 300. Further, as one of the indirect parameter measuring means, the ash input amount detected by the ash input amount measuring device 110 is detected. A slag temperature estimated value Te is calculated from A (ton / h) and input power Q (kW) detected by the input power meter 120 based on the following equation (1). The result is displayed on the display surface 310 of the display panel 300.
[0023]
Q = {(B × Te + C) × 1000 / D + E} × A + F × Te / 1400 (1)
However,
Q: Input power (kW)
A: Ash input (ton / h)
B: Specific heat of ash (kcal / kg ° C )
C: ash soluble antipyretic (kcal / kg)
D: Constant (kcal / kWh)
E: taking out the heat of the exhaust gas (kW h / to n)
F: Amount of heat released from the furnace (kW)
Te: Estimated slag temperature (° C)
1400: slag temperature (° C.)
B, C, D and E are constants, and F is a constant determined by the size of the furnace body.
[0024]
Hereinafter, the operation management method of the ash melting furnace by the operation management system having the hardware configuration as described above will be described.
FIG. 2 is a flowchart showing the operation management method of the first embodiment, which is based on the automatic operation (step S1 ) based on the slag temperature TS measured by the slag thermometer 20, but the slag thermometer. It determines whether indirect parameter measured by the measurement slag temperature TS and a plurality of other indirect parameter measuring means at 20 is in a normal relationship (step S 2). When in normal relationship (if an affirmative determination is made in step S 2) continues automatic operation by the slag temperature TS, which is measured by the slag thermometer 20 returns to step S 1.
[0025]
If a negative determination result is obtained in step S 2, since the case where there is not a normal relationship, alarm and issued (step S 3), further determines whether the slug thermometer 20 is operating normally (Step S4 ). This determination may be made by determining whether or not the indirect parameter measuring means not in a normal correspondence with the slag thermometer 20 is operating normally, or there are a plurality of indirect parameter measuring means. In this case, the determination may be made based on the number n of indirect parameter measuring means not in a normal correspondence relationship, or the ratio of n to the total number N of indirect parameter measuring means, that is, n / N. This is because there is a low possibility that a plurality of indirect parameter measuring means become abnormal at the same time, and there is a high possibility that the slag thermometer 20 is abnormal.
[0026]
And when the slag thermometer 20 is operating normally (when affirmative determination is made in step S4 ), the indirect parameter measuring means is abnormal, so the indirect parameter measuring means is repaired and restored ( step S 5) from continuing the automatic operation return by slag temperature TS, which is measured by the slag temperature meter 20 in step S 1.
However, indirect parameter measuring means is normal, if the slag thermometer 20 is abnormal (if the determination is negative in step S 4) stops the automatic operation due to slag thermometer 20 (Step S 6), the manual operation Switching (step S13 ).
[0027]
In the first embodiment, as described above, when the slag thermometer 20 is automatically operated, but the slag thermometer 20 is determined to be abnormal from the relationship with the indirect parameters measured by other indirect parameter measuring means . The automatic operation by the slag temperature TS measured by the slag thermometer 20 is stopped and switched to the manual operation.
[0028]
Figure 3 is a flowchart showing a driving control method of the second embodiment, after the stop automatic operation by the slag temperature meter 20 in step S 6 in the first embodiment, the in-furnace gas thermometer 30 switched to automatic operation by the measured furnace gas temperature TG in (step S 7), When switched to automatic operation by measured furnace gas temperature TG in-furnace gas thermometer 30, furnace gas thermometer relationship indirect parameters measured by the measured furnace gas temperature TG and a plurality of other indirect parameter measuring means at 30 it is determined whether a normal (step S 8), step if the determination is positive Continue automatic operation by been furnace gas temperature TG measurement in the return furnace gas temperature gauge 30 to S 7.
[0029]
If a negative determination result is obtained in step S 8, since if there is not a normal relationship, alarm and issued (step S 9), further, whether the in-furnace gas thermometer 30 is operating normally Is determined (step S10 ). This determination is performed in the same concept as the step S 4.
[0030]
If the in-furnace gas thermometer 30 is operating normally (when an affirmative determination is made in step S10 ), the indirect parameter measuring means is abnormal, so that the indirect parameter measuring means is repaired and restored. Te (step S 11) from measured by return furnace gas temperature gauge 30 in step S 7 the furnace gas temperature TG continues automatic operation by.
However, indirect parameter measuring means is normal, in-furnace gas thermometer 30 (if a negative determination is made in step S 10) abnormal cases, stop automatic operation by furnace gas thermometer 30 (Step S 12) , it switched to manual operation (step S 13).
[0031]
In the second embodiment, as described above, first, automatic operation is performed by the slag thermometer 20, but it is determined that the slag thermometer 20 is abnormal from the relationship with the indirect parameters measured by other indirect parameter measuring means . In the case of being performed, the automatic operation by the slag temperature TS measured by the slag thermometer 20 is stopped, and the automatic operation by the in-furnace gas temperature TG measured by the in-furnace gas thermometer 30 is switched. When it is determined that the in- furnace gas thermometer 30 is also abnormal from the relationship with the indirect parameters measured by the indirect parameter measuring means, automatic operation is performed with the in- furnace gas temperature TG measured by the in-furnace gas thermometer 30 . Cancel and switch to manual operation.
[0032]
Hereinafter, steps S 2 in the flowchart of FIG. 2 and 3, the indirect parameter measured by the slag temperature TS and the indirect parameter measuring means which is measured by the slag thermometer 20 performed at step S 8, the in-furnace gas thermometer 30 A check on whether the relationship between the in-furnace gas temperature TG measured in step 1 and the indirect parameter measured by the indirect parameter measuring means is normal will be described.
[0033]
First, a description will be given of the relationship slag flow rate VS slag temperature TS and slag flow rate measuring device 40 which is measured at the slag thermometer 20 was measured.
Since the higher the slag temperature TS low viscosity slag flow rate VS increases, the viscosity the lower the slag temperature TS is the reduced slag flow rate VS is higher, the slag temperature TS is correctly slag thermometer 20 is measured, the slag flow rate If the slag flow velocity VS measured by the measuring device 40 is correct, the slag temperature TS of the slag thermometer 20 is taken on the horizontal axis, and the slag flow velocity VS of the slag flow velocity measuring device 40 is taken on the vertical axis. It should be in the area as shown in A).
[0034]
Therefore, for example, a graph as shown in FIG. 4A is formed on the screen 310 of the display panel 300, and a normal area obtained in advance is written therein.
Then, the measurement data is plotted on the screen.
As a result, for example, when plotted at a point such as 4A1, the slag temperature TS measured by the slag thermometer 20 is higher than the actual value, or the slag flow velocity VS measured by the slag flow velocity measuring device 40. Means that the slag temperature TS measured by the slag thermometer 20 is lower than the actual value, or when the slag temperature TS is plotted at a point such as 4A2. It means that the slag flow velocity VS measured by the flow velocity measuring device 40 is higher than the actual value. Therefore, in such a case, the alarm 320 is activated to notify the operator.
[0035]
To same for the measured slug flow velocity V S of the in-furnace gas thermometer measured furnace gas temperature T G and slag flow rate measuring device 40, which is performed in step S 8.
FIG. 4B shows an example, in which the horizontal axis represents the in-furnace gas temperature TG measured by the in-furnace gas thermometer, and the vertical axis represents the slag flow rate VS measured by the slag flow rate measuring device 40.
[0036]
And indirect parameters of other indirect parameter measuring means, slag thermometer 20 measures slag temperature T S of the furnace and the gas temperature TG was measured of the in-furnace gas thermometer 30, also of the relationship is the same. Hereinafter, the description will be made sequentially.
[0037]
Figure 5 (A), (B) slag temperature T S measured slag thermometer 20 is that shown in the furnace gas temperature TG of the gas thermometer 30 is measured in the furnace, the slag suspended matter measurement device 50 is the relationship of the slag hanging object length LS measured. If the slag temperature TS and the in-furnace gas temperature TG are high, the viscosity is low, so the slag droop length LS is shortened. If the slag temperature TS and the in-furnace gas temperature TG is low, the viscosity is high, so the slag droop length LS is long. Therefore , the region in the normal case is lowered to the right as shown in the figure.
[0038]
(A) in FIG. 6, the slag temperature T S measured slag thermometer 20 is that shown (B), the the furnace gas temperature TG of furnace gas thermometer 30 is measured, Higami slag thermometer 55 It is the relationship of the measured upper slag temperature TT. Slag temperature TS, Higami slag temperature TT A high furnace gas temperature TG becomes high, slag temperature TS, since the in-furnace gas temperature TG is also low low if Higami slag temperature TT, the region of the normal case as shown It goes up to the right.
[0039]
The ash covering area measured by the ash covering area measuring device 60 may be displayed as an image as shown in FIG. 7 on the display surface 310 of the display panel 300, or the ash covering area ratio RA is calculated from the image. Then, the display as shown in FIGS. 8A and 8B may be used.
If the slag temperature TS and the furnace gas temperature TG are high, the ash is immediately converted into slag, and the area covered by the ash is reduced. If the slag temperature TS and the furnace gas temperature TG are low, the ash is not immediately converted into slag. In order to maintain this state, the area covered with ash becomes large, and in FIGS. 8A and 8B, the normal area is shown in the lower right.
[0040]
(A) in FIG. 9, what is shown (B), the slag temperature TS slag thermometer 20 was measured, and the furnace gas temperature TG of furnace gas thermometer is measured, furnace wall temperature gauge 70 is measured It is the relationship of the temperature TW1 of the refractory 16 of the ash melting furnace 1, and the temperature TW1 of the refractory 16 shows a higher value if the slag temperature TS and the furnace gas temperature TG are higher, and the slag temperature TS and furnace gas temperature. If TG is low, it shows a low value, and as shown in the figure , the normal region is a figure that rises to the right.
[0041]
Figure 10 (A), that shown in (B) is slag temperature TS, the furnace gas temperature TG of furnace gas thermometer 30 is measured, the oven wall coolant temperature gauge 80 that slug thermometer 20 is measured Is the relationship of the temperature TW2 of the cooling water flowing through the water jacket 81 formed in the wall of the ash melting furnace 1, and the temperature TW2 of the cooling water is higher if the slag temperature TS and the in-furnace gas temperature TG are higher. Since the slag temperature TS and the in-furnace gas temperature TG are low, the values are low , and the region in the normal case is an upwardly rising diagram.
[0042]
(A) in FIG. 11, that shown in (B) is slag temperature TS slag thermometer 20 was measured, and the furnace gas temperature TG of furnace gas thermometer 30 is determined, trough coolant temperature gauge 90 is It is the relationship between the measured temperature TW3 of the cooling water flowing through the water jacket 91 formed in the basket 9, and the cooling water temperature TW3 shows a higher value when the slag temperature TS and the furnace gas temperature TG are higher. If the temperature TS and the in-furnace gas temperature TG are low, a low value is shown, so that the region in the normal case is an upwardly rising diagram.
[0043]
Figure 12 (A), that shown in (B) is slag temperature was measured slag thermometer 20 T S, the furnace gas temperature TG was measured of the in-furnace gas thermometer 30, the slag flows aquarium thermometer 100 is the relationship of the temperature TW4 of the water in the slag inflow water tank 10 into which the slag from the slag discharge basket 9 flows, and the temperature TW4 of the water in the slag inflow water tank 10 is the slag temperature TS , furnace a high internal gas temperature TG showed a high value, the slag temperature TS, exhibits a low value the lower the furnace gas temperature TG, the region of the normal case is a diagram of an upward-sloping.
[0044]
Figure 13 (A), that shown in (B) is slag thermometer 20 measures slag temperature T S of the furnace gas temperature TG was measured of the in-furnace gas thermometer 30, the control circuit 200 Ash The relationship between the slag temperature estimated value Te calculated based on the above formula (1) from the ash input amount A (ton / h) detected by the input amount measuring device 110 and the input power Q (kW) detected by the input power meter 120. It is.
Also in this case, the normal area is a figure rising to the right.
[0045]
Note that the method of processing and displaying the measurement data of each indirect parameter measuring means is not limited to the above, and any method may be used as long as an abnormality is easily detected and the operator can easily monitor.
[0046]
【The invention's effect】
Operation management system ash melting furnace according to the present invention are those for automatic operation based on the slag temperature, in addition to the slag thermometer for measuring the slag temperature, corresponding to at least one of the temperature of the slag has an indirect parameter measuring means for measuring an indirect parameter varying Te, whether the slag temperature and the indirect parameter is in a normal relationship is determined, whereby a slag thermometer abnormal If it turns out the, as they may Hassu an alarm, is prevented operation by erroneous data, the quality of the slag generated in the ash melting furnace can be stabilized, or overheating accidents from investing the excess energy Occurrence etc. can also be prevented.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an operation management system for an ash melting furnace according to the present invention.
FIG. 2 is a flowchart of operation management in the first embodiment of the present invention.
FIG. 3 is a flowchart of operation management in the second embodiment of the present invention.
[4] (A) is a diagram showing the relationship between the slag flow rate VS and slag temperature T S.
(B) is a diagram showing the relationship between the slag flow rate VS and furnace gas temperature T G.
[5] (A) is a diagram showing the relationship between the slag suspended matter length LS and slag temperature T S.
(B) is a diagram showing the relationship between the slag suspended matter length LS and furnace gas temperature T G.
It is a graph showing a relationship 6 (A) Higami slag temperature TT and the slag temperature T S.
(B) is a diagram showing a relationship Higami slag temperature TT and furnace gas temperature T G.
FIG. 7 is a diagram for explaining an ash covering region on an upper surface of a slag.
8 (A) is a diagram showing the relationship between the ash coating ratio RA and slag temperature T S.
(B) is a diagram showing the relationship between the ash coating ratio RA and furnace gas temperature T G.
It is a graph showing a relationship 9 (A) furnace wall temperature TW1 and slag temperature T S.
(B) is a diagram showing the relationship between the furnace wall temperature TW1 and furnace gas temperature T G.
It is a diagram showing the relationship between FIG. 10 (A) furnace wall coolant temperature TW2 and slag temperature T S.
Is a graph showing the relationship (B) furnace wall coolant temperature TW2 and furnace gas temperature T G.
11 is a diagram showing a relation between (A) trough coolant temperature TW3 and slag temperature T S.
(B) is a diagram showing the relationship between gutter coolant temperature TW3 and furnace gas temperature T G.
Is a diagram showing the relationship between Figure 12 (A) slag flowing water bath temperature TW4 and slag temperature T S.
(B) is a diagram showing the relationship between slug flow water tank temperature TW4 and furnace gas temperature T G.
13 (A) is a diagram showing the relationship between the estimated slag temperature Te and the slag temperature T S.
(B) is a diagram showing the relationship between the estimated slag temperature Te and the furnace gas temperature T G.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Plasma ash melting furnace 10 ... Slag receiving water tank 20 ... Slag thermometer 30 ... In-furnace gas thermometer 40 ... Slag flow velocity measuring device 50 ... Slag hanging thing length measuring device 55 ... Slag top slag thermometer 60 ... Ash covering area measuring device 70 ... Furnace wall thermometer 80 ... Furnace wall cooling water thermometer 90 ... Slag cooling water thermometer 100 ... Slag inflow water tank thermometer 110 ... Ash input meter 120 ... Power meter 200 ... Control circuit 300 ... Display panel 310 ... Display surface 320 ... alarm

Claims (5)

An operation management system for an ash melting furnace that melts ash into slag,
A slag thermometer that measures the slag temperature in the furnace;
The slag flow rate measured by the slag flow rate measuring device, the slag suspended length measured by the slag suspended length measuring device, the elevated slag temperature measured by the elevated slag thermometer, and the refractory of the ash melting furnace measured by the furnace wall thermometer The temperature, the temperature of the cooling water flowing through the water jacket formed in the wall of the ash melting furnace measured by the furnace wall cooling water thermometer, the water flowing through the water jacket formed in the tank measured by the soot cooling water thermometer temperature of the cooling water, or any of the temperature of the water in the slag flows in a water bath slag slag flowing aquarium thermometer exits the trough for slag discharge were measured flows, in response to the slag temperature changes At least one indirect parameter measuring means for measuring as an indirect parameter,
Anda judging means for judging whether the slag temperature and the indirect parameter relationship in the region of a normal case obtained in advance,
When in the region of the normal case where the relationship between the indirect parameters and the slag temperature is obtained in advance performs automatic operation based on the slag temperature,
Wherein when the relationship of the slag temperature and the indirect parameter is not in the region of a normal case obtained in advance, operation management system according to claim Rukoto that Hassu an alarm. Further, the furnace gas thermometer for measuring the furnace gas temperature existing in the slag above,
Anda judging means for judging whether or not in the region where the relationship between the indirect parameters and the furnace gas temperature is normal previously obtained,
After having issued the alarm, when said slag thermometer is determined to be abnormal is to abort the automatic operation based on the slag temperature, for automatic operation based on the furnace gas temperature,
Operation management system according to claim 1 relationship between the indirect parameters and the furnace gas temperature is in the absence in the region of the normal case obtained in advance, characterized in that for issuing an alarm. The number of indirect parameter measuring means is plural,
When the number of indirect parameters that are no longer in a normal correspondence with the slag temperature is greater than a predetermined value, or the total number of indirect parameters that are no longer in a normal correspondence with the slag temperature. 3. The operation management system according to claim 1, wherein when the ratio to the number is larger than a predetermined value, it is determined that the reason why the normal correspondence relationship is lost is the slag thermometer. 4. . The number of indirect parameter measuring means is plural,
The number of the indirect parameters that are no longer normal relationship with the furnace gas temperature is, if larger than a predetermined value, or that are no longer normal relationship with the furnace gas temperature If the percentage of the number of the total number of indirect parameter is larger than a predetermined value, causes that are no longer normal correspondence and judging to be in the furnace gas thermometer The operation management system according to claim 2 . When the number of indirect parameters that are no longer in a normal correspondence with the slag temperature is greater than a predetermined value, or the total number of indirect parameters that are no longer in a normal correspondence with the slag temperature. 5. The operation management system according to claim 4, wherein when the ratio to the number becomes larger than a predetermined value, it is determined that the slag thermometer is not in a normal correspondence relationship. 6.

Images