KR20010063252A - Apparatus for protecting the micro wave sounding device - Google Patents

Abstract

PURPOSE: An apparatus for protecting a microwave sounding unit is provided to smoothly measure the level of a charged material in a blast furnace by preventing a flying charged material from being stuck into an antenna located inside the steel pipe and a transmitter head from being damaged by the high temperature, and repair and maintain the apparatus safely and promptly by blocking rising gases in the furnace during the normal operation. CONSTITUTION: In a microwave sounding unit equipped with a transmitter head (107) installed on a sealed flange (105) and an antenna horn (104) mounted inside a steel pipe (103) so as to detect the level of a charged material inside a blast furnace (101), the apparatus comprises a controller detecting a temperature of the upper part of the furnace and a channeling index of the blast furnace with a sensor member (8), and transmitting the detected data to a data tank gauge; a cooling part (10) spraying nitrogen gas to the side of the transmitter head (107) and the antenna horn (104) according to the signal of the measured data of the sensor member (8); and a blocking part (30) blocking a rising gas inside the blast furnace (101) from being flown into the steel pipe (103).

Description

Microwave Sounder Protection Device {APPARATUS FOR PROTECTING THE MICRO WAVE SOUNDING DEVICE}

The present invention relates to a device for protecting a microwave sounding machine, and more particularly, to protect the microwave sounding machine measured as microwave at the level of the charged material inside the blast furnace from high temperature, and to prevent scattering and floating charges. The present invention relates to a microwave sounding device protection device which prevents this and blocks the floating gas inside the furnace to safely and easily perform repair and disassembly operations during operation.

In general, the microwave sounding machine 100 employed in the blast furnace is an antenna horn gauge type RTG 2920 type, as shown in Fig. 1, the hearth portion of the furnace 101. On the hollow pipe-shaped steel pipe 103 installed in the airtight flange 105, the transmitter head (transmitter head) 107 is installed so as to be exposed to the outside, the antenna horn 104 is located in the furnace in the steel pipe 103. The microwaves are emitted at 30 degrees from the horn 104 to detect the charge level in the furnace 101.

Reference numeral 102 denotes a riser and 106 denotes a transmission head flange.

Here, the maximum allowable atmosphere temperature of the transmitter head 107 is 70 ℃, the operating temperature in the tank is 150 ℃ maximum, the tracking range is 30m, there should be no interference in the antenna horn 104.

However, the internal yellowing of the furnace 101 changes frequently, so that the burnout and slips inside the furnace, the burnout of the transmission head card due to the high temperature when the charge level down occurs, and the internal combustion coke is the antenna horn 104 of the microwave sounding machine 100. The device 100 is connected to a facility trouble when it is unstable, such as blocking the radio wave path, thereby preventing the charging level measurement.

In addition, when the disassembly and repair of the apparatus 100 according to the abnormal occurrence can not block the injury of the furnace gas there was a troublesome problem to perform the repair work after stopping the blast furnace work.

Accordingly, the present invention has been made in view of the above-described conventional problems, and an object thereof is to prevent charges scattered upwards due to yellowing fluctuations in the antenna horn located in the steel pipe, and the transmitter head is kept at a high temperature. It is possible to smoothly carry out the furnace charge level measurement by preventing damage to the furnace, and to provide a microwave sounding machine protection device that can block and repair the in-house floating gas during normal operation.

1 is a state in which a general microwave sounder is installed,

Figure 2 is an overall configuration showing a microwave sounding machine protection device according to the present invention,

3 is a block diagram showing a cooling unit employed in the microwave sounder protection device according to the present invention,

Figure 4 is a block diagram showing a block employed in the microwave sounder protection device according to the invention.

Explanation of symbols on the main parts of the drawings

11,19 .... Control valve 12,18 .... No. 1, 2 nitrogen gas line

12a .... Ring Main Hall 15 ..... Curtain Horn

31 ..... Casing 32 .... Disc

33 ..... Cooling water circulation line 34 .... Cylinder member

35a, 35b .... Drainage line 101 .... Furnace

103 .... Steel Pipe 104 .... Antenna Horn

105 .... Hermetic flange 107 .... Transmitter head

As a technical configuration for achieving the above object, the present invention,

In the microwave sounding machine having a transmitter head mounted on the sealed flange and an antenna horn mounted in the steel pipe to detect the level of the charge in the furnace,

A controller for detecting the hearth temperature and the extraction index of the furnace as a sensor member and transmitting the detected data to the radar tank gauge;

Cooling unit for injecting nitrogen gas to the transmitter head and the antenna horn side in accordance with the signal of the measurement data of the sensor member; And

By providing a microwave sounding device protection device comprising a; blocking portion for blocking the floating gas in the furnace flow into the steel pipe.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an overall configuration diagram showing a microwave sounder protector according to the present invention, Figure 3 is a block diagram showing a cooling unit employed in the microwave sounder protector according to the present invention, Figure 4 is a present invention As a block diagram showing a blocking portion employed in the microwave sounding machine protection device according to the present invention, the apparatus 1 of the present invention is a microwave sounding machine for measuring the charge level inside the furnace 101 as microwaves ( To protect the 100 from high temperature, floating, scattering charges, and to block the floating gas in the blast furnace during repair, such a device (1) consists of a controller, a cooling unit 10 and a blocking unit (30).

Here, the microwave sounder 100 is composed of a transmitter head 107 and an antenna horn 104 to radiate the microwave generated into the blast furnace, as in the prior art.

That is, the controller mounts the sensor member 8 in the vicinity of the riser 102 in the upper part of the furnace so as to detect the hearth temperature and the extraction index of the furnace 101, and is detected by the sensor member 8. The data is transmitted to the radar tank gauge side to determine the opening and closing time of each control valve 11 and 19 to be described later to determine the nitrogen gas supply time.

Then, the cooling unit 10 for injecting nitrogen gas toward the transmitter head 107 and the antenna horn 104 in accordance with the signal of the measurement data detecting the temperature of the furnace section as the sensor member 8 is the transmitter head ( A nozzle 18a of the first nitrogen gas line 18 having a control valve 19 and a manual shut-off valve 19a on one side of the body portion is detachably mounted to cool the 107.

In addition, a curtain horn 15 is mounted on the outside of the antenna horn 104 at a predetermined interval to block the injuries of the charge, and the inside of the antenna horn 104 on the outer circumferential surface of the top of the curtain horn 15. A plurality of branch pipe nozzles 13 are inserted obliquely at intervals of 90 ° in a radial direction so as to inject nitrogen gas, and each branch pipe nozzle 13 is controlled via a flexible hose 13a via a control valve 11, It is connected to the ring main tube 12a connected to the second nitrogen gas line 12 having the passive blocking side 11a.

As a result, nitrogen gas is injected into the antenna horn 104 when the control valve 11 is opened, thereby preventing the charged material from being scattered and floating upward in the furnace.

Here, the nozzle hole 14 of the antenna horn 104 corresponding to the end of the branch pipe nozzle 13 is configured to be elliptical so as to prevent the branch pipe nozzle 13 from being inserted into the antenna horn 104. It is preferable.

In addition, the blocking unit 30 which blocks the floating gas in the furnace 101 when the microwave sounding machine 100 is repaired is connected to replace the upper portion of the furnace 101 and the lower end of the steel pipe 103. A casing 31, a disk 32 which is assembled in the casing 31 so as to be forward and backward reciprocated, and has a cooling water circulation line 33 therein, and the disk 32 and the rod end 34a are A cylinder member 34 to be connected and a supply and drain line 35a and 35b for supplying and draining cooling water to the cooling water circulation line 33 are configured.

In addition, the blocking part 40 protects the antenna horn 104 because the microwave measurement range is 30 m in consideration of the fact that the maximum measurement level of electric fighting is 28 m from the bottom of the sealed flange 105 of the steel pipe 103. To extend the steel pipe 103 to the upper 2m to install the casing 31 and the disk 32 at the bottom to block the floating gas.

In FIG. 4, reference numeral 31a denotes a seat ring.

The operation of the present invention having the configuration as described above will be described.

First, the upper temperature inside the furnace is always detected by the sensor member 8 installed near the rising pipe 102 on the upper part of the furnace 101, and the detected temperature data is provided through the data acquisition unit (not shown). The transmitted data is sent back to the cab PC through the field bus modem.

Here, the control signal is transmitted to the control valve 19 of the first nitrogen gas line 18 through the PLC. If the temperature detected in the upper part of the furnace is above the set temperature, the control valve 19 is opened to operate the nitrogen tank. Cooling nitrogen gas is injected to the transmitter head 107 through the nozzle 18a of the first nitrogen gas line 18 connected to (9) to cool the transmitter head 107 below the maximum allowable ambient temperature.

Then, when the extraction index becomes higher than the set value due to the change in the furnace interior, the control valve 11a of the second nitrogen gas line 12 is opened to supply nitrogen gas to the ring main tube 12a, and the supplied nitrogen Since the gas passes through the curtain horn 15 and is supplied to the antenna nozzle 104 in the radial direction with the plurality of branch pipe nozzles 13, the charged matter is caught in the antenna horn 104, making level measurement difficult. Nitrogen gas is injected downward so as not to.

On the other hand, when the extraction index inside the furnace exceeds the upper limit or when the microwave sounding machine 100 is to be repaired, the cylinder member 34, which has been retracted during the normal operation by using the electromagnetic valve 39, is moved forward to the maximum. By advancing the disk 32 mounted on the rod end 34a forward in the casing 31, the passages in the upper portion of the steel pipe 103 and the furnace 101 where the antenna horn 104 is disposed are blocked. Floating gas generated in the completely block the flow into the steel pipe (103).

When the coolant is supplied to the water supply line 35a drawn out from the rod end 34a of the cylinder member 34 while the floating gas in the furnace is blocked as the disk 32, the supplied coolant is the disk 32. Circulates the cooling water circulation line 33 installed in the cooling chamber 33 and is directly affected by the temperature of the blast furnace to cool down the disk 32 heated to a high temperature. To be drained.

In addition, the operator disassembles the hermetic flange 105 and the transmission head flange 106 in the state where the steel pipe 103 and the passage of the hearth are blocked as the disk 32, and then the damaged antenna horn 104 is moved to the outside. Withdrawal and repair work can be safely performed without fear of injured gas.

According to the present invention having the above-described configuration, the transmitter head can be cooled and protected at or below the maximum allowable ambient temperature even when the furnace temperature is rapidly increased due to the yellowing fluctuations, thereby preventing burnout and damage of the components and scattering. By preventing the floating charges from being caught in the antenna horn which generates microwaves, it prevents the malfunction of the microwave siding machine, enables stable level measurement, and blocks the floating gas in the furnace during normal operation. And the effect which can be performed quickly is obtained.

Claims (5)

A microwave sounder 100 having a transmitter head 107 installed on the hermetic flange 105 and an antenna horn 104 mounted in the steel pipe 103 to detect the charge level in the furnace 101. In A controller for detecting the hearth temperature and the extraction index of the furnace 101 as the sensor member 8 and transmitting the detected data to the radar tank gauge; Cooling unit 10 for injecting nitrogen gas to the transmitter head 107 and the antenna horn 104 in accordance with the signal of the measurement data of the sensor member (8); And And a shielding portion (30) for blocking the floating gas in the furnace (101) from flowing into the steel pipe (103). The method of claim 1, The cooling unit 10 is a removable nozzle 18a of the first cooling line 18 having an automatic side 19 and a manual shut-off side 19a on one side of the body portion to cool the transmitter head 107. Microwave sounder protection device, characterized in that attached to. The method of claim 1, The cooling unit 10 is mounted to the outside of the antenna horn 104 at a predetermined interval, the curtain horn 15 that can block the injuries of charge, and the antenna on the top outer peripheral surface of the curtain horn 15 A plurality of branch pipe nozzles 13 are inserted obliquely at intervals of 90 ° in the radial direction so that nitrogen gas can be injected into the horn 104, and each branch pipe nozzle 13 is connected to the flexible hose 13a by a medium. Microwave sounding machine protection device characterized in that it is in communication with the ring main tube (12a) connected to the second nitrogen gas line (12) having a control side (11), a passive cutoff side (11a). The method of claim 3, wherein In order to prevent the branch nozzle 13 from being inserted into the antenna horn 104, the nozzle hole 14 of the antenna horn 104 corresponding to the end of the branch nozzle 13 is formed in an elliptical shape. Microwave sounder protector. The method of claim 1, The cut-off unit 30 is a casing 31 connecting the upper part of the furnace 101 and the lower end of the steel pipe 103 so as to be interchangeable, and is assembled in the casing 31 so as to be movable forward and backward. The disk 32 having the cooling water circulation line 33, the cylinder member 34 to which the disk 32 and the rod end 34a are connected, and the cooling water is supplied to the cooling water circulation line 33 and drained. Microwave sounding machine protection device comprising a water supply and drainage line (35a, 35b).