KR101377223B1 - Refractory life detection device for dry-type coke extinguishing facility - Google Patents

Abstract

Refractory life detection system of coke dry fire extinguishing system is introduced.
To this end, the present invention, in the coke dry fire extinguishing system (CDQ), the neck portion (3) to which the prechamber (1) into which the coke in the red state produced in the coke oven is charged and the cooling chamber (2) disposed thereunder are connected. When the wear of the refractory formed in the inside, including a detection unit 100 for detecting the thickness of the refractory, the detection unit 100 is a cylindrical pipe 110 of the wear-resistant, corrosion-resistant material is filled with a refractory therein When the thickness of the refractory reaches the set, the electrical signal generator 200 is installed inside the cylindrical pipe 110 to transmit the electrical signal.

Description

REFRACTORY LIFE DETECTION DEVICE FOR DRY-TYPE COKE EXTINGUISHING FACILITY}

The present invention is a coke dry fire extinguishing system (CDQ) that grasps the wear state of the refractory formed in the neck between the prechamber and the cooling chamber of the Coke Dry Quenching Plant (CDQ) equipment operating in the coke plant in real time. It relates to a refractory life detection device of).

Coke used as a heat source and ironic reducing agent in the blast furnace of the steelmaking process is to dry the coal in a coke oven (coke oven) to produce a coke in a glowing state (1000 ℃ or more).

In addition, the above-described method of cooling the coke in the red state includes a wet extinguishing method for sprinkling and cooling the cooling water in a normal temperature state and a dry extinguishing method for cooling by using an inert gas (nitrogen).

Figure 1 shows the overall configuration of the CDQ system.

Referring to Figure 1, the coke produced in the coke oven is filled with the coke in the bucket is loaded into the prechamber 1 through the upper opening of the CDQ body using a crane.

Then, the inert gas flowing into the lower portion of the cooling chamber by the blowing force of the circulating fan is moved to the prechamber 1 provided at the upper side by the rising air flow to exchange heat with the hot coke (1000 ° C. or more). When it is gradually cooled and finally discharged, it is cooled to about 180 ° C.

The high temperature (high temperature, high pressure steam) is recovered through the dry extinguishing of the red coke, and the dry extinguished coke in the cooling chamber 2 is discharged to the coke cutting device.

In general, steam generated in the boiler plant 5 of the coke dry fire extinguishing system is often converted into electrical energy in the steam turbine generator 6 and utilized. In order to operate this steam turbine generator 6 stably, it is important to keep the steam generation amount of a boiler constant.

It is an object of the present invention to determine in real time the wear state of the refractory formed in the neck (narrowed structure) 3 between the prechamber (1) and the cooling chamber (2) in real time by refractories in the neck (3) The purpose is to prevent an accident that the heat exchange tube (4) of the boiler installation caused by abrasion occurs in direct contact with the hot coke rupture.

As shown in FIG. 2, the refractory formed inside the connection part shows a state in which coke coming down from the upper part and the heat exchange tube are directly in contact with each other.

Refractories in the neck (3) are intended to prevent direct contact with the coke coming from the top of the heat exchange tube (4), which is part of the boiler plant (5), and to prevent the transfer of high temperature coke heat to the outside of the body. It is installed and consists of amorphous castable refractory with a thickness of about 70cm.

Due to the continuous contact of hot coke coming down from the top with castable refractory, the thickness becomes thinner with its use.

This operation takes several days to repair, which in turn is a major contributor to plant downtime.

In addition, as shown in FIG. 2, if the refractory portion is excessively worn and as a result, the coke coming down to the bottom and the boiler heat exchange tube 4 are directly contacted to cause the breakage of the heat exchange tube 4 in the CDQ main body circulation system. Sudden gas generation and flames can cause large burns and explosions.

There is no means to prevent such an accident until now, which causes many problems during the operation of the facility.

Patent No. 10-0504372, 'Repair Fire Injector for Dry Fire Extinguishing Equipment' is a device for repairing damaged fire retardant inside the main body of dry fire extinguishing equipment. Even though it still has, the 'CD-equipment facility in which the internal wall wear of the CD-Q chamber is reduced' can also reduce the wear of the refractory formed inside the main body, but the thickness of the refractory set in advance by the operator When it comes to the maintenance, it is possible to prevent the occurrence of a safety accident in advance by the maintenance in advance contains a problem.

(Prior art 1) Korean Patent Publication No. 10-0504372 (Prior art 2) Korean Patent Publication No. 10-0815984

The present invention is to solve the problems as described above, the purpose of the refractory of the coke dry fire extinguishing system to enable the operator to repair before a safety accident occurs through the detection unit for detecting the refractory thickness of the coke dry fire extinguishing equipment in advance The object is to provide a life detection device.

The refractory life detection system of the coke dry fire extinguishing system (CDQ) is introduced.

To this end, the present invention includes a detection unit for detecting the thickness of the refractory when the refractory formed in the interior of the neck portion is connected to the pre-chamber and the cooling chamber disposed below the coke of the glowing coke produced in the coke oven is worn out However, the detection unit is a wear-resistant, corrosion-resistant cylindrical pipe is filled with a refractory therein, characterized in that the electrical signal generating port is installed inside the cylindrical pipe so that the electrical signal is delivered when the thickness of the refractory reaches.

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The electrical signal generating port is characterized in that the pair of conductors installed to correspond to each other inside the cylindrical pipe, an insulator coupled to the pair of conductors on the outer side of the cylindrical pipe and a voltage group connected to the insulator.

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The electrical signal generating port is characterized in that the two pairs of conductors of different lengths are installed inside the cylindrical pipe, and when the thickness of the refractory reaches a set, the operator sends a first wear signal and a second wear signal, which are electrical signals. do.

The conductor is characterized in that consisting of copper wire or rebar,

The refractory material filled in the cylindrical pipe is made of the same material as the refractory formed in the neck portion connected to the prechamber and the cooling chamber disposed below it.

On the other hand, in another embodiment of the present invention, in the coke dry fire extinguishing system (CDQ), the inside of the neck portion is connected to the pre-chamber in which the coke in the red state produced in the coke oven is charged and the cooling chamber disposed below In the abrasion of the refractory formed in the, including a detection unit for detecting the thickness of the refractory, the detection unit is a cylindrical pipe of abrasion-resistant, corrosion-resistant material is filled with the refractory inside, and when the thickness of the set refractory reaches a pressure drop signal It is characterized in that the pressure signal generating port is installed to be delivered.
The pressure signal generation port is installed so that the pipes formed therein correspond to each other in the longitudinal direction inside the cylindrical pipe,

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The outer side of the cylindrical pipe is characterized in that the connection portion is coupled to the pipe and the pressure gauge coupled to the connection portion and a pressure switch for transmitting a signal of the pressure drop to the operator is installed.

The pressure signal generating port is characterized in that the two pipes of different lengths are installed in the cylindrical pipe, the first wear signal and the second wear signal which is a pressure drop signal to the worker when the thickness of the refractory reaches do.

Nitrogen is filled in the tube formed space therein, characterized in that the accumulator capable of continuously accumulating nitrogen in the tube is coupled to the pressure gauge.

Refractory life detection device of the coke dry fire extinguishing system (CDQ) of the present invention. When used, there are various advantages as follows.

First, there is an advantage to prevent the coke and the heat exchange tube of the boiler installation to collide and rupture,

Second, there is an advantage of preventing the falling off and damage of the refractory formed inside the body due to the high temperature, high pressure of the boiler due to the rupture,

Third, there is an advantage that the explosion accident due to the increase of hydrogen by the high pressure, high temperature water generated when the heat exchange tube rupture, is prevented,

Fourth, there are various advantages that the safety accident of the worker due to the explosion is prevented in advance.

1 is a general configuration diagram of a conventional CDQ facility,
2 is a view showing a refractory wear state of the neck of the conventional CDQ equipment,
3 is a view showing a state in which the refractory life detection device of the coke dry fire extinguishing system (CDQ) of the present invention is installed in the refractory of the neck portion,
Figure 4a is a cross-sectional view showing a state in which the detection device of the present invention is installed in the refractory of the neck portion,
4b is a state diagram in which the detection device of the present invention measures the life of the refractory by measuring the thickness of the refractory of the neck portion already set;
5 is a block diagram showing an electrical signal generation port for measuring the thickness of the refractory by the electrical signal of the present invention;
Figure 6a is a view showing a principle that the first wear signal is transmitted to the operator by the electrical signal of the present invention,
6b is a view showing a principle that the second wear signal is generated by the electrical signal of the present invention,
Figure 7 is a block diagram showing a device capable of measuring the thickness of the refractory using a nitrogen-filled tube of the present invention,
Figure 8a is a view showing the principle that the first wear signal is transmitted to the operator by the pressure signal generating port using a nitrogen-filled tube of the present invention,
8b is a view showing a principle that the second wear signal is transmitted to the operator using a nitrogen-filled tube of the present invention.

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

Figure 3 is a block diagram showing a state in which the refractory life detection device of the coke dry fire extinguishing equipment of the present invention is installed on the refractory.

As shown, the lower neck 3 of the prechamber 1 consists of a narrow passageway while the red coke charged above the prechamber 1 descends to the cooling chamber 2, which is the lower part. 2) It is structurally narrow in order to improve the heat exchange capacity of the cooling screen installed at the top.

In the present invention, the high temperature coke is in direct contact with the heat exchange tube (4) in the heat exchange facility, and as a result, a breakthrough occurs, the hot water and high pressure boiler water is ejected to the red coke, causing a large accident due to a large amount of flame and steam. It is a device that transmits a warning signal to a worker in advance by measuring the thickness of the refractory formed in the neck portion (3) to prevent.

As shown in Figure 3, the detection unit 100 of the present invention will be seen installed in the refractory of the neck portion.

Detecting unit 100 of the refractory life detection device of the present invention is characterized in that it comprises an electrical signal generating port 200 for sending an alert to the operator by the electrical signal when the worker reaches the thickness of the refractory already set in one embodiment It is done.

Electrical signal generation port 200 to warn the operator by the electrical signal of the detection unit 100 of the refractory life detection device of the present invention is made of a cylindrical pipe 110, the inside of the cylindrical pipe length direction The pair of conductors 130a are installed to correspond to each other, and the outer side of the cylindrical pipe includes an insulator 140 coupled to the pair of conductors 130a and a voltage generator 150 connected to the insulator 140. do.

As shown in Figure 5, the cylindrical pipe 110 is made of a wear-resistant, corrosion-resistant material, it is preferable to use stainless steel SUS 321.

Inside the cylindrical pipe 110, a pair of conductors 130a through which electricity can flow is inserted therein so as to correspond to each other, and an insulator coupled to the pair of conductors 130a on one outside of the cylindrical pipe 110 ( 140 and a voltage transformer 150 coupled to the insulator are installed.

As shown in the drawing, a 24 V voltmeter 150 is connected to the outside.

The voltage transformer 150 is connected to the insulator 140 by conducting wires, and one of the conducting wires has a closed circuit formed through coke due to abrasion of the refractory, and a light for sending a warning signal to an operator when electricity flows. Install Light).

5 is a state in which a warning signal is not sent to a worker through a light because the conductor installed in the cylindrical pipe 110 is not connected to the electric current through the wear of the refractory yet.

Referring to FIG. 6A, an operation state of transmitting a first wear signal to an operator when the thickness of the refractory reaches a preset value is described.

In general, coke is composed of a material that can flow electricity as a solid carbon fuel with many holes, which removes volatile components by heating carbon-based materials such as coking coal, asphalt, and petroleum.

That is, when the refractory wears out and reaches a predetermined thickness, as shown in FIG. 6A, a pair of conductors 130a installed inside the cylindrical pipe 110 form a closed circuit through which electricity can flow through this coke. Through the first signal to wear to the worker.

By the first wear signal, the operator can know exactly how thick the refractory is at this time. At this time, the refractory can be repaired in advance. If the refractory is further worn out, the second wear signal is transmitted to the worker. You can also repair.

Among the refractory life detection devices of the present invention, the electrical signal generating device 200 is implemented to send a first wear signal and a second wear signal as an electrical signal to an operator. The conductors 130a and 130b are installed in the cylindrical pipe 110.

FIG. 6B is a view illustrating an operation state in which the second wear signal is transmitted to the worker through the electrical signal generation hole 200 configured as described above, and the operation state in which the first wear signal is transmitted to the worker is omitted as described above. When the current reaches the thickness of the refractory already set to the worker and the current flows, the structure for transmitting the second wear signal to the worker has a conductor 130b having a smaller length than the pair of conductors 130a for transmitting the first wear signal. Is installed inside the cylindrical pipe 110 so that the refractory reaches its thickness so that electricity can flow through the coke.

Specifically, if the refractory wears further after the first wear signal and reaches the thickness of the refractory, the second wear signal may transmit a current through the coke as shown in FIG. 6B to transmit the signal to the worker. Is the mechanism by which lights are turned on.

The conductor constituting the electrical signal generator 200 of the present invention is preferably made of copper wire or rebar, through which electricity can flow, and the refractory 120 filled in the cylindrical pipe is disposed in the prechamber 1 and the lower portion thereof. Characterized in that it is made of the same material as the refractory formed inside the connection portion of the cooling chamber 2, the reason is that the wear proceeds at the same speed as the refractory formed inside the neck (3) to know the exact state of the refractory wear For sake.

Refractory life detection device of the dry fire extinguishing system of the present invention is characterized in that it provides a device that allows the operator to measure the thickness of the refractory through the pressure signal generating port 300 for detecting a pressure drop signal, for this purpose Pipe 110 is characterized in that it comprises a pipe 140a, a pressure gauge 160, a pressure switch 170, the space is formed.

7 is a view showing the overall configuration of the present invention that the pressure drop signal is transmitted to the operator to measure the thickness of the current refractory.

The cylindrical pipe 110 is made of a wear-resistant, corrosion-resistant material, the outer shell is preferably made of a stainless material.

Inside the cylindrical pipe 110, a space formed with a tube 140a is installed in the longitudinal direction of the cylindrical pipe 110, the outer side of the cylindrical pipe 110 is connected to the tube 190 and the connection portion ( The nitrogen supply pipe which can be combined with the 190 and the nitrogen is injected into the tube (140a) formed space therein, a pressure gauge (160), the accumulator (180) for measuring the change in the pressure inside the tube is installed have.

The tube 140a is preferably filled with nitrogen, and the reason is that in the case of nitrogen, the effect of oxygen blocking is to use nitrogen in terms of preventing safety accidents.

After the pipe 140a having a space formed therein so as to be filled with nitrogen is installed inside the cylindrical pipe 110, the nitrogen is supplied through the nitrogen supply pipe 5, and the pressure inside the current nitrogen pipe is measured. The pressure gauge 160 can be installed and the accumulator 180 capable of accumulating nitrogen continuously in the nitrogen pipe.

The accumulator 180 continuously supplies nitrogen to the inside of the nitrogen tube to maintain a constant pressure.

Referring to FIG. 8A, an operation state in which the thickness of the refractory is sensed using the nitrogen-filled tube 140a to transmit a first wear signal to an operator will be described.

When the refractory is worn by the coke and reaches the thickness of the refractory already set by the operator, when the nitrogen inside the nitrogen pipe 140a is released to the outside, a pressure drop signal is sensed by the pressure gauge 160 connected thereto. By operating the pressure switch 170 that can send an electrical signal by the falling signal is to transmit the first wear signal to the operator.

The present invention provides a device that can transmit the first wear signal and the second wear signal to the operator using a nitrogen pipe, two pipes (140a, 140b) of different lengths for this purpose is a cylindrical pipe 110 It is characterized in that it is installed inside.

Referring to FIG. 8B, an operation state in which a first wear signal and a second wear signal are transmitted to an operator using a nitrogen-filled tube will be described.

The operation state in which the first wear signal is transmitted to the operator has already been described and omitted. In the case of the second wear signal, when the worker reaches the thickness of the refractory already set, nitrogen inside the pipe 140b is released to the outside. When the pressure gauge 160 connected thereto measures the pressure drop, the pressure switch 170 capable of transmitting an electrical signal is operated to transmit a second wear signal to an operator.

If the nitrogen-filled pipe reaches the thickness of the refractory that has already been set, the nitrogen is released to the outside and the pressure drop signal allows the operator to accurately measure the thickness of the refractory at this time. This can be prevented in advance.

4A and 4B, the structure in which the detection part 100 of this invention is installed in a refractory body is demonstrated.

Figure 4a is a diagram showing that 10 detection units of the present invention are spaced apart at regular intervals around the refractory.

Figure 4b is a view showing the thickness of the refractory set by the operator in advance, when the thickness of the refractory reaches 40 cm can transmit the first wear signal to the operator, the second wear signal is the electrical / Nitrogen tube can be installed thinner than the thickness of the 70 cm.

It is preferable that the neck part 3 is comprised with the stainless steel plate so that the detection rod of this invention may be supported.

The operation of the present invention will be described in detail with reference to FIGS. 6A and 6B, 8A and 8B.

As shown in FIG. 6A, a current flows through the coke reaching the thickness of the refractory already set, and a first wear signal is transmitted to the worker. As shown in FIG. 6B, a current flows through the coke in the same principle as shown in FIG. 6B. The wear signal is sent to the operator.

When reaching the thickness of the refractory already set, as shown in Figure 8a, when the pressure inside the nitrogen pipe is lowered by the nitrogen pipe is pierced by the release of nitrogen, the pressure gauge 160 detects the lowered pressure, the pressure switch 170 When the first wear signal is transmitted to the worker, and reaches the thickness of the refractory that is already set, as shown in FIG. 8B, the nitrogen pipe is also pierced, and when the pressure inside the nitrogen pipe decreases, the lowered pressure is measured by the pressure gauge 160. ) Detects the second wear signal by the pressure switch 170 to the worker.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

100: detection unit 110: cylindrical pipe
120: refractory 130a, 130b: conductor
140: insulator 150: voltage transformer
140a, 140b: tube 160: pressure gauge
170: pressure switch 180: accumulator
190: connection part 200: electric signal generating port
300: pressure signal generating port

Claims (9)

In coke dry fire extinguishing system (CDQ),
Detects the thickness of the refractory when abrasion of the refractory formed in the interior of the neck (3) to which the pre-chamber (1) into which the coke in the red state produced in the coke oven is charged and the cooling chamber (2) arranged below is connected Including detection unit 100,
The detection unit 100 is a cylindrical pipe 110 of the wear-resistant, corrosion-resistant material is filled with a refractory therein, the electrical signal generation inside the cylindrical pipe 110 so that the electrical signal is transmitted when the thickness of the refractory reaches Refractory life detection device of the coke dry fire extinguishing (CDQ), characterized in that 200 is installed. delete The method according to claim 1,
The electrical signal generator 200 is a pair of conductors (130a) and installed to correspond to each other inside the cylindrical pipe 110,
The outer side of the cylindrical pipe 110 of the insulator 140 is coupled to the pair of conductors (130a) and the coke dry fire extinguishing system (CDQ), characterized in that the voltage generator 150 is connected to the insulator 140 Refractory life detection device. The method according to claim 3,
The electrical signal generator 200 has two pairs of conductors (130a, 130b) of different lengths are installed in the cylindrical pipe 110, the first wear is an electrical signal to the operator when the thickness of the refractory reaches the set A refractory life detection device for a coke dry fire extinguishing system (CDQ), characterized in that it sends a signal and a second wear signal. The method according to claim 3 or 4,
The conductor is characterized in that consisting of copper wire or rebar,
The refractory 120 filled in the cylindrical pipe is a dry fire extinguishing system, characterized in that made of the same material as the refractory formed inside the neck portion to which the prechamber 1 and the cooling chamber 2 disposed below it are connected. (QQ) refractory life detection device. In coke dry fire extinguishing system (CDQ),
Detects the thickness of the refractory when abrasion of the refractory formed in the interior of the neck (3) to which the pre-chamber (1) into which the coke in the red state produced in the coke oven is charged and the cooling chamber (2) arranged below is connected Including detection unit 100,
The detection unit 100 is a cylindrical pipe 110 of the wear-resistant, corrosion-resistant material is filled in the refractory 120 therein, the pressure signal generation port 300 is so that the pressure drop signal is transmitted when the thickness of the refractory is reached Refractory life detection device for a dry fire extinguishing system (CDQ), characterized in that installed. The method of claim 6,
The pressure signal generation port 300 is installed so that the pipe 140a having a space therein corresponds to each other in the longitudinal direction in the cylindrical pipe 110,
The outer side of the cylindrical pipe 110, the connection portion 190 is coupled to the pipe 140a and the pressure gauge 160 coupled to the connection portion 190 and the pressure switch 170 that can transmit a signal of the pressure drop to the worker Refractory life detection device of a dry fire extinguishing (CDQ) characterized in that the installation. The method of claim 7,
The pressure signal generation port 300 has two pipes 140a and 140b having different lengths are installed in the cylindrical pipe 110, and the first wear is a pressure drop signal to the worker when the thickness of the refractory is reached. A refractory life detection device for a dry fire extinguishing system (CDQ), characterized in that it sends a signal and a second wear signal. The method according to any one of claims 7 and 8,
Nitrogen is filled in the tube formed space therein, the dry extinguishing facility (CDQ), characterized in that the accumulator (180) capable of continuously accumulating nitrogen in the tube is coupled to the pressure gauge (160) Refractory life detection device.

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