JPH0736000U - Cooling water leakage detection device for water cooling panel of electric furnace wall - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a device that can automatically detect leakage of cooling water from the electric wall of the electric furnace wall and can immediately respond. [Composition] A differential pressure flow meter 9 for measuring the outlet cooling water flow rate is provided in the cooling water outlet pipe 8 of the electric furnace wall water cooling panel 4,
The measured value, the amount of water in the steady state, or performing a feed difference calculation to the data comparison calculation unit 11 that compares the amount of water at the start of operation, when the difference exceeds a predetermined threshold value input from the threshold value input unit 11, By the data comparison calculation alarm device 14 provided so as to output to the alarm device 13, the excess of the threshold value is detected as water leakage, and a water leakage alarm is output, and at the same time, cooling provided on the water supply side cooling water main pipe 3 to the water cooling panel. The water main pipe shutoff valve 5 was automatically closed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for detecting leakage of cooling water of a water cooling panel on the wall of an electric furnace.

[0002]

[Prior art]

 Conventionally, the leakage of cooling water from the water cooling panel of the electric furnace furnace wall may have been caused by heat damage to the cooling water pipes, electrolytic corrosion, cracks, etc. If so, I try to determine that there is a water leak.

Since there are a large number of water-cooled panels, it is difficult to determine which water-cooled panel is leaking water. How to identify the water-leaked water-cooled panel is to stop the operation of the electric furnace and cool it. Stop water supply, wait for the cooling water of the water-cooling panel to evaporate, and after evaporation, open the hand valves on the water supply side of each water-cooling panel one by one to open the steam of the water-cooling panel that is leaking water. Measures have been taken, such as checking for water leaks and searching for water leak water cooling panels.

[0004]

[Problems to be solved by the device]

 For this reason, there are problems that it takes time from the discovery of the water leak to the treatment, and the operation must be stopped. Needless to say, delaying the discovery of water leaks into the furnace will cause an explosion in the furnace, which is extremely dangerous.

In view of the above problems, the present invention provides a water cooling panel in which a differential pressure flow meter is installed at the outlet of a water cooling panel on the wall of an electric furnace and water is automatically leaked due to a change in the outlet cooling water flow rate. It is an object of the present invention to provide a cooling water leak detection device for an electric furnace furnace wall water cooling panel that automatically stops the supply of the cooling water in the relevant part.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention is an apparatus for detecting water leakage of a water cooling panel by a change in the cooling water flow rate at the outlet of the water cooling panel of the electric furnace furnace wall. At the outlet of the electric furnace wall water cooling panel in each zone divided into several zones on the wall, enter the measured value and the differential pressure flow meter installed to measure the outlet cooling water flow rate Data comparison operation unit that compares the amount of water in the state or the amount of water at the start of operation, and the data comparison operation alarm device that is provided to output to the alarm device when the difference in comparison of the flow rate values exceeds a predetermined threshold value. By detecting that the outlet cooling water flow rate of the water cooling panel exceeds the threshold value as a water leak, a water leak alarm for the water cooling panel is output, and at the same time, the cooling water main pipe cutoff valve on the water supply side of the water cooling panel is automatically closed. It was done.

[0007]

[Action]

 The water cooling panel in each zone, which is divided into several zones on the wall of the electric furnace, is supplied with cooling water through the cooling water main pipe cutoff valve and the hand valve, respectively, and the cooling water installed at the outlet of the water cooling panel is supplied. Measure the outlet flow rate with a differential pressure flow meter and compare. For the comparison, the flow rate data near the outlet is sent to the data comparison and calculation device, where the difference between the steady state water amount to the water cooling panel and the water amount at the start of operation is calculated, and the difference is calculated. Water leakage is automatically detected when the water pressure exceeds a predetermined threshold.

When a leak is detected, a leak alarm for the corresponding water cooling panel is output by the differential pressure flow transmitter, and the cooling water main pipe cutoff valve of the water cooling panel in the leaking zone is automatically closed to cool the water. Immediately stop the water supply. It is also possible to manually close the water cooling panel hand valve on the water supply side.

[0009]

【Example】

 An embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a DC electric furnace, in which 1 is an electric furnace, 2 is a furnace wall, 4 is a circumference divided into 16 and are arranged all around the cross section. In the water cooling panel of the furnace wall, each water cooling panel 4 is branched from the cooling water main pipe through the cooling water main pipe cutoff valve, and the cooling water is passed through the water cooling panel hand valve, respectively, and the predetermined pipe is passed through the outlet pipe. One zone is configured to collect water at a location, and cooling water is configured to pass through each water-cooled panel in four zones from the top to the bottom of the furnace wall.

FIG. 2 is a block diagram of the cooling water leakage detection device for the furnace wall water cooling panel 4 divided into the above-mentioned four zones. Each water cooling panel 4 has a cooling water main pipe 3 for each zone. A branch water pipe 6 branched from the cooling water main pipe 1 via the provided cooling water main pipe cutoff valve 5 is provided, and a water cooling panel hand valve 15 is provided in each of the branch water pipes 6 to provide a water cooling panel from the inlet 7 of each water cooling panel 4. Cooling water is passed through the inside of the cooling water 4, and a differential pressure flow meter 9 is provided in each cooling water outlet pipe 8 to measure the cooling water flow rate at the water cooling panel outlet.

The differential pressure flow meter 9 measures the flow rate of the cooling water at the outlet of the water cooling panel, and the measured data is input to the data comparison calculation section 11 of the data comparison calculation alarm device 14. The data comparison calculation alarm device 14 performs a difference calculation between the water amount at the outlet of the water cooling panel and the water amount in the steady state or the water amount at the time when the operation is started, and the water amount difference is indicated by the water amount trend 12 and When the difference exceeds a predetermined threshold value input from the threshold value input unit 10, the water cooling panel is detected as water leak, and at the same time, the alarm device 13 is activated and the cooling water main pipe cutoff valve 5 is remotely activated to "close". Equipped with means.

That is, the steady-state water amount and the water amount near the water cooling panel cooling water outlet are compared, and when the difference exceeds a predetermined threshold, the water amount at the time when the operation is started and the water cooling panel cooling water outlet closest to the outlet. If the difference exceeds a predetermined threshold, it is detected as a water leak. When a water leak is detected, a water leak alarm for the corresponding water cooling panel is issued by the detection signal, and the cooling water cutoff valve 5 of the cooling water main pipe 1 is automatically closed. The cooling water outlet pipe 8 of each water cooling panel 4 is provided with a water cooling panel hand valve 16 on the outlet side, and all of them are adapted to collect water in a drainage tub 17 installed at a predetermined position by the pipe.

Although the water cooling panel leak detection device for one zone has been described above, each differential pressure flowmeter 9 for measuring the cooling water flow rate at the outlets of the water cooling panels for the first to fourth zones has the above data comparison operation. The measured value is input to the data comparison / calculation unit 11 of the alarm device 14, and the water leak of the water cooling panel of each zone can be detected by the same means as described above and the alarm is issued. Also, the cooling water main pipe cutoff valve 5 for the water cooling panel is closed, and the supply of the cooling water to the water cooling panel can be immediately stopped.

Further, in the above embodiment, the differential pressure flow meter is used, but it is also possible to use an ultrasonic flow meter or the like.

[0015]

[Effect of device]

 As described above, the present invention measures the flow rate of cooling water at the outlet of the water cooling panel of the furnace wall and compares it with the steady state water amount and the water amount at the start of operation, and the difference between the excess tendency and the excess over the predetermined threshold value. When it is detected and exceeded, an alarm is issued, and at the same time, the cooling water main pipe shutoff valve of the water cooling panel can be closed.Therefore, the water cooling panel that leaked from many water cooling panels of the electric furnace furnace wall water cooling panel can be automatically automatically operated. Can be detected. At the same time, the supply of cooling water to the water cooling panel can be automatically stopped immediately and the generation of steam can be stopped. In addition, the cooling water main pipe shutoff valve can be opened and closed remotely, and water leakage of the water cooling panel during the operation of the electric furnace can be automatically and early detected, and the steam explosion in the electric furnace and the furnace can be properly prevented. You can

[Brief description of drawings]

FIG. 1 is a sectional view of an electric furnace using the present invention.

FIG. 2 is an explanatory structural diagram of the present invention.

[Explanation of symbols] 1 electric furnace 2 furnace wall 3 cooling water main pipe 4 water cooling panel 5 cooling water main pipe shutoff valve 6 branch water pipe 7 water cooling panel cooling water inlet 8 water cooling panel cooling water outlet pipe 9 differential pressure flow meter 10 threshold input unit 11 Data Comparison Calculation Unit 12 Water Flow Trend 13 Alarm Device 14 Data Comparison Calculation Alarm Device 15 Water Cooling Panel Hand Valve 16 Water Cooling Panel Outlet Hand Valve 17 Drain

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Yoshio Sukegawa 8-28 Motomachi, Suita City, Osaka Prefecture (72) Creator Mamoru 1-76-2, Nishikimoto, Yao City, Osaka Prefecture (72) Creator Sadami Takahashi Osaka 6-8-5 Gouraku, Hirano-ku, Osaka, Japan (72) Inventor Masao Hira 4-93, Abo, Matsubara-shi, Osaka

Claims (1)

[Scope of utility model registration request] 1. A differential pressure flow meter for measuring the outlet cooling water flow rate is provided at the outlet of the furnace wall water cooling panel, and the measured value is input,
The data comparison calculation unit that compares the water amount in the steady state or the water amount at the start of operation and the data comparison calculation alarm device provided so as to output to the alarm device when the difference exceeds a preset threshold value, and the threshold value is exceeded. Is detected as a water leak, an alarm output is provided, and a cooling water leak detection device for a water cooling panel of an electric furnace furnace wall is provided with means for automatically closing the cooling water main pipe cutoff valve of the water cooling panel.