JPS60260687A - Detection of feed coal level and device therefor in coke oven - Google Patents

Abstract

PURPOSE:To make the amt. of feed coal coincide with a predetermined value independent of properties of raw coal, by inserting a pipe supplied with a constant-pressure fluid into a carbonization chamber and controlling coal feeding by detecting pressure variation when the coal fed into the carbonization chamber reaches the tip of the pipe. CONSTITUTION:When a coal feeding car travelling on a coke oven is positioned on a predetermined carbonization chamber 4, a pipe 16 within a protection conduit 15 is lowered to a predetermined height by a moving device 17, and air at a determined pressure is ejected out of the tip of the pipe 16. Then raw coal is fed to the carbonization chamber 4. When the upper end of the coal within the chamber 4 reaches the lower end of the pipe 16, the air in the pipe 16 is prevented from flowing out. Therefore air pressure rises and a damper 14 is closed by a signal from a pressure sensor 19 which detects the pressure rise to stop coal feeding.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Application Field The present invention provides a method for automatically detecting the coal charging level when charging coal from a coal loading car into a coking chamber of a coke oven. The present invention relates to a charge level detection method and device.

(2) Prior art and problems In general, charging coal into each carbonization chamber in a coke oven is as follows:
Coal charging is carried out from the coal loading car running above the coke oven through the coal charging port in each coking chamber. Conventionally, the amount of coal charged was determined by rotating a table feeder installed at the bottom of the coal hopper for a predetermined amount of time. . Therefore, due to changes in the properties of the coal, such as its moisture content and particle size, the amount charged may be over or under, reducing operational efficiency and making it difficult to maintain a constant quality of coke.

(3) Purpose of the Invention The present invention has been made by focusing on the above-mentioned conventional problems, and its purpose is to:

To provide a method and device for detecting a coal charging level, which can always ensure a constant coal charging level regardless of the properties of the coal and prevent excess or deficiency of the charging amount.

(4) Structure of the Invention In order to achieve the above-mentioned object, the present invention has a method of inserting a pipe into the carbonization chamber from the coal charging port of the coke oven when charging coal into the carbonization chamber from a coal loading car running in a coke oven. , a method of supplying fluid at a constant pressure into the pipe and detecting a change in the pressure of the fluid when the coal charged in the carbonization chamber reaches the tip of the pipe to detect the level of coal charging; In order to carry out this method, a pipe is inserted into the coking chamber from a coal loading car, a pipe moving device is connected to the rear end of this pipe and moves the pipe downward, and a fluid at a constant pressure is supplied into the pipe. The gist of this invention is a coal charging level detection device that is comprised of a fluid supply device and a pressure detection device that detects changes in fluid pressure within a pipe.

(5) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail based on the accompanying drawings.

FIG. 1 shows a case where a coal loading car 2 running on a coke oven 1 is equipped with a coal charging level detection device 3 according to the present invention. When charging coal through the hopper 5, the detection portion of the above device is inserted into the coal charging port 6 of the coking chamber 4 to detect the coal charging level. In FIG. 1, numeral 7 is a combustion chamber, 8 is an extruder, and 8 is a fire extinguisher.

As shown in FIG. 2, the two-part hopper 5 is composed of a two-part hopper 5a and a lower hopper 5b, both of which are communicated through a narrow coal cutting opening 10. A table feeder 12 rotated by a drive motor 1 is provided at the bottom of the upper hopper 5a, and the rotation of the table feeder 12 cuts coal into the lower hopper 5b.
It has a structure in which it protrudes one step. In addition, a charging guide 13 is provided at the lower end of the lower hopper 5b for guiding the cut coal to the coal charging port 6 of each carbonization chamber 4. A damper 14 is provided so as to be horizontally movable.

In this embodiment, a protection tube 15 extending in the vertical direction is disposed in the center of the lower hotter 5b, and a detection portion of the coal charging level detection device 3 is configured in the protection tube 15. An elongated pipe 16 is inserted.

The coal charging level detection device 3 includes, in addition to the two-part pipe 18, a pipe moving device that moves this pipe 1B up and down.
, an air supply device 18 that supplies compressed air into the pipe 18 , and a pressure detection device 18 that detects pressure changes within the pipe 18 . The pipe 18 is made of metal, and a pipe moving device 17 is connected to the rear end of the pipe 18 protruding from the upper wall 20 of the lower hopper 5b via a wire 21. This pipe moving device 17 is connected to the lower hopper 5b.
The wire 2! is provided on the upper wall 20 of the wire 2! It consists of a wire drum 22 that winds the other end, a motor (not shown) that rotates the wire drum 22 in forward and reverse directions, and a pulley 23 that hooks and rotates the wire 21. By winding up or unwinding the coal and moving the pipe 16 up and down within the protection tube 15, the tip of the pipe 18 can be moved into and out of the coal charging chamber 4 from the coal charging port 6.

The amount of the tip of the vibrator 1B charged into the carbonization chamber 4 is determined by the number of rotations of the wire drum 22, and can be arbitrarily set by controlling this number of rotations with a limit switch (not shown) or the like.

The air supply device 18 also includes a compressor 24, a solenoid valve 25 connected to the output end of the compressor 24,
Compressed air from compressor 24 (approximately 4 to 5 Kg/c
It is composed of a pressure reducing valve 2B that reduces the pressure of air) to weakly compressed air (approximately 30 wmg/crn'). And this pressure reducing valve 2
6 and the rear end of the pipe 16 are connected by a flexible communication pipe 27, and weakly compressed air regulated by the pressure reducing valve 2B is supplied into the pipe 16. The compressor 24 can be one already installed in the coal loading car 2, and the solenoid valve 2 is electrically connected to the limit switch of the pipe moving device 17, so that the tip of the pipe 18 is When the charging port 8 is charged to a predetermined position, a limit switch is activated and opened.

The pressure detection device 19 is provided on the output side of the pressure reducing valve 26 and is also electrically connected to the drive motor 11 of the table feeder 12 and the electromagnetic valve 25. Based on the detection signal from the pressure detection device 18, the motor 11 is The rotation is stopped and the solenoid valve 25 is also closed. Pressure detection device 1
The detected pressure 9 can be set appropriately, and the amount of coal charged can also be adjusted by changing the magnitude of this set value.

Therefore, when implementing the above-mentioned coal charging level detection device, first install the coal charging car 2 in a predetermined position, remove the cover of the coal charging port 6 of each carbonization chamber 4, and then, before charging coal,
The pipe 16 is lowered into the carbonization chamber 4 through the coal charging port 6, and its tip is set at approximately the same height as the target coal charging level. Next, the solenoid valve 25 is opened by the operation of the limit switch, and weakly compressed air is supplied to the pipe 18, and air flows out from the tip of the pipe 16. In this state, the table feeder 12 of each hopper 5 is rotated to start charging into the carbonization chamber 4. Then, the coal charged into the carbonization chamber 4 reaches the tip of the pipe 16,
When the tip becomes slightly hidden, air stops flowing out from the tip of the pipe 16 and the internal pressure gradually increases. When the pressure detection device 18 detects the set pressure due to the pressure increase, a detection signal is output, and the detection signal causes the motor 111JF11''8''t-c of the table feeder 12 to be
'8*v＞'? z),, *L"6(111,ill,
, closes the valve 25. Next, the pipe moving device 17 is activated 9 to lift the pipe 1B from the coal charging port 8, and the damper! The series of operations is completed by closing 4.

Incidentally, the coal loading car 2 moves to the next step based on the coal loading cycle of the coke oven 1, and repeats the same operation as described above.

In the above embodiment, compressed air at a constant pressure is used as the fluid, but it is needless to say that the fluid is not limited to air. It is also possible to arrange the pipe 16 outside the lower hopper 5b.

(8) Detailed Description of the Invention According to the present invention, the charging level of coal can always be kept constant regardless of the properties of the coal. Therefore, efficient operation can be carried out without causing excess or deficiency in the amount charged, and the quality of coke can be kept constant. Furthermore, since the method and device are simple, they can be easily applied to existing equipment.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a coal charging vehicle equipped with a coal charging level detection device according to the present invention, and FIG. 2 is a detailed explanatory diagram of the present invention. 1... Coke oven 2... Coal loading car 3... Coal charging level detection device 4... Carbonization chamber 6... Coal charging port 1B... Pipe 17... Pipe moving device 18...・Air supply device (fluid supply device) 19...
Pressure detection device patent applicant Nippon Steel Chemical Co., Ltd.

Claims (2)

[Claims] (1) When charging coal into the carbonization chamber from the coal loading car running on the coke oven, insert a pipe into the carbonization chamber from the coal charging port of the coke oven, supply fluid at a constant pressure into this pipe, and A method of detecting the level of coal charging by detecting the pressure change of the fluid when the coal charged into the carbonization chamber reaches the tip of the pipe. (2) A pipe inserted into the carbonization chamber from the coal loading car, a pipe moving device connected to the rear end of this pipe to move the pipe up and down, and a fluid supply device supplying fluid at a constant pressure into the pipe. , a pressure detection device for detecting changes in fluid pressure within a pipe, and a coal charging level detection device for a coke oven.