KR20020053951A - System for burning flying gases in door of coke oven - Google Patents

Abstract

PURPOSE: A system for burning flying gases in door of coke oven is provided to suppress air pollution by separating and collecting noxious gases dispersed or exhausted into the air so that the collected noxious gases are completely burned in the combustion chamber of the coke oven before being released into the air. CONSTITUTION: The system for burning flying gases in door of coke oven comprises a collection means which is equipped with a plurality of dust collection hoods(30), venturi pipe hood lines(31), cutout open-and-shut electric powered valves(32) and automatic hood part gas sensing sensors(33), wherein the dust collection hoods(30) are positioned at the upper side of left and right single doors(12-1,12-2) of carbonization chambers of a coke coven; a control unit means in which a collection line(35) is connected to the side of an end platform(36) of oven structure, the inlet part of the collection line(35) is connected to venturi scrubbers(40,40-1 to 40-6), and at one side part of which a blower(50) and a rotation adjusting inverter control motor(60) are equipped; an oven door noxious gas incineration means in which a discharge transfer line(50-1) and a gas gathering pipe(70) are connected to the outlet side of the blower(50) so that they are gathered to a gathering pipe, a combustion branch pipe(70-1) separated from the gathering pipe and connected to combustion chamber upper layer part holes(80-1,80-2) is equipped at one side of the gathering pipe, electric powered control valves(70-2,70-3), a combustion chamber(80) and combustion sensing differential pressure sensors(70-4,70-5) are equipped on each of separated branch pipes; and a control means equipped with an automatic control panel(90) for controlling operation of units contained in each of the above means.

Description

System for burning flying gases in door of coke oven}

The present invention relates to a fugitive gas combustion system of a coke oven door, and more specifically, to the upper portion of a door of a coke oven carbonization chamber, the fugitive gas, which is a harmful gas generated during coal distillation, is dispersed and released into the atmosphere. The present invention relates to a fugitive gas combustion system of a coke oven door capable of suppressing pollution by supplying to a combustion condition of a combustion chamber equipped with a coke oven after secondary collection and exhausting it to the atmosphere after complete combustion.

In general, the structure of the coke oven is composed of a carbonization chamber 10 and a combustion chamber 80 on top of the heat storage chamber 20, as shown in Figure 1, the coal charged in the carbonization chamber 10 is The combustion chamber 80 is dried for a certain period of time with the furnace wall interposed therebetween to coke. In the coke oven, the coke production process is performed by recharging coal, dry distillation and coke discharge repeatedly, and the coke oven is composed of a plurality of carbonization chambers 10. Drying occurs as (a)) occurs, and the gas generation fluctuates greatly according to the drying time.

In the process of carbonizing the charged coal, as shown in FIG. 1, the carbon dioxide is absorbed by the heat of the combustion chamber 80. In the initial and middle stages of the drying, gas is absorbed while absorbing a large amount of heat. Positive positive pressure (+) is maintained in the initial carbonization chamber (10) due to the diffusion phenomenon that is emitted by converting to Problem is derived.

Looking at the causes that lead to such a problem, after the coal is initially loaded in the carbonization chamber 10 is maintained at a high gas pressure of several tens of mmH ₂ 0, accordingly, if the carbonization chamber door 12 is completely sealed is a problem This does not occur. However, in practice, a phenomenon in which harmful gas is frequently released to the atmosphere by the carbonization chamber initial pressure due to the poor sealing of the carbonization chamber door 12 and the door frame is caused in practice.

The above toxic gas emission is limited to the poor carbonization chamber door 12 among the constituents of the oven carbonization chamber, but the exception is a lot of occurrence due to seasonal shrinkage and expansion change factors.

FIG. 2 is a photograph of a phenomenon of toxic gas emission of a coke oven door. As illustrated in FIG. 2, toxic gas emission is distributed from the lower part of the oven door 12 to the upper layer without distinction. Since hot air is dissipated and rising air flow (b) is generated from the lower side to the upper side, the generated gas is always concentrated in the upper door portion A-1, and the collected gas is dispersed and released into the atmosphere.

In the discharge phenomenon as described above, the worker uses a lot of methods of sealing by using a sealing agent, but due to the risk factors such as high temperature, height, rainy weather, it is impossible to realistically deal with the environmental management. Accordingly, measures to prevent air pollution are urgently required due to external conditions.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been created to solve the above problems, and includes gas detecting means for detecting harmful gas emitted to the upper part of the carbonization chamber door, gas collecting means, and gas incineration means. It is an object of the present invention to provide a fugitive gas combustion system of a coke oven door that can solve the problem of environmental pollution, which is currently seriously emerging externally by combustion treatment of harmful gases using a combustion chamber provided in a coke oven.

The above object of the present invention is the same as the carbonization chamber configuration of the coke oven, the dust collection hood located on the upper left and right single door of the carbonization chamber, venturi tube laryngeal line, shut-off opening and closing electric valve, automatic hood gas detection Oven structure supporting frame beam is provided with a plurality of sensors in an integrated structure, the main transport pipe for transport connected to the plurality of hood lines are formed in the same length by the structure of the oven and joined on the left and right sides. Collecting means installed on the upper horizontal side;

The combined collection line is configured to extend toward the oven structure end platform side, and the inlet side of the line is connected to the venturi scrubber device, which is a cleaning separation device, as the primary separating means to separate the impregnated gas, and the venturi scrubber outlet side One side connected to the line is provided with a blower and a rotation control inverter control motor, and equipped with a total pressure sensor and an emergency damper to control the control motor to collect, primaryly separate and brake the harmful dust in the oven door at a constant pressure. Control device means;

The blower outlet side is connected to the discharge transfer line and the gas collection pipe to be collected in the collecting pipe, one side of the collecting pipe is provided with a combustion branch pipe separated into two in one line and combined with the combustion chamber upper hole, and each of the separated branch pipe It is equipped with an electric control valve, a combustion chamber and a combustion detection differential pressure sensor. The differential pressure sensor senses a target value "K" mmH ₂ O of the high-temperature waste gas exhaust combustion chamber in two stages of combustion, and opens the electric control valve above the detected combustion chamber. And an oven door harmful gas incineration means for supplying noxious gas to be treated with a chimney provided in the oven after complete combustion while passing through the combustion chamber such as the combustion chamber waste gas in two stages of combustion; And

It is equipped with an automatic control panel for the control operation of the device included in each of the above means, to control the sequential control to be processed from the initial gas detection to capture, primary separation, secondary collection, and supply to the second stage combustion chamber and incineration It can be achieved by providing a fugitive gas combustion system of the coke oven door configured including control means.

1 is a harmful gas emission phenomenon of the coke oven carbonization chamber door,

Figure 2 is a photograph of the harmful gas emission phenomenon of the coke oven door,

3 is a schematic view of a fugitive gas combustion system of a coke oven door according to the present invention;

Figure 4 is a schematic view of the fugitive gas collection portion of the coke oven door according to the present invention,

5 is a block diagram of the primary separation and braking device after the fugitive gas collection according to the present invention,

6 is a view showing a combustion chamber incineration process after the fugitive gas collection of the coke oven door according to the present invention,

7 is an operation control flowchart for carrying out a fugitive gas combustion process of the coke oven door according to the present invention.

Explanation of symbols on main parts of drawing

10: carbonization chamber (a): door gas

20: heat storage chamber 80: combustion chamber

12: door (a) -1: door upper layer

30: Dust collection hood 31: Venturi tube laryngeal line

32: laryngeal electric valve 33: gas detection sensor

40: venturi scrubber 50: blower

50-4: Suction pressure sensor 60: Control motor

70: assembly pipe 70-2, 70-3: electric valve for gas supply

70-4,70-5: Differential pressure detection sensor 90: Automatic control panel

80-1: 1st stage combustion chamber (odd number) 80-2: 2nd stage combustion chamber (odd number)

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

3 is an overall configuration diagram of a fugitive gas combustion system of the coke oven door according to the present invention, Figure 4 is a schematic view of the fugitive gas collection portion of the coke oven door according to the present invention, Figure 5 is a fugitive gas collection according to the present invention After the first separation and braking system configuration.

As shown in FIG. 3, the present invention is the same as the number of components of the carbonization chamber illustrated in FIG. 4 as the harmful gas collecting means discharged to the upper part of the carbonization chamber door (a-1) of the coke oven. A plurality of dust collecting square hood devices 30 positioned on the upper left and right single doors 12-1 and 12-2 are provided to collect door gas, and the hood structure generates suction airflow by differential pressure to provide dust collection efficiency. Venturi tube laryngeal line 31 and a hood line to open and close the shut-off opening and closing the electric valve 32, the automatic gas detection sensor 33 is attached to the inside of the front of the hood portion to open and close the electric valve by detecting the target sensor value. Inhale harmful gas from the door.

On the other hand, one side of the plurality of hood lines 31, the main transport pipe (34, 34-1) for transporting the same length by the structure of the oven, left, right side (12-1, 12-1) It becomes a collection line 35 in the form of being joined from the side, the transfer pipe is to be maintained horizontally on the top of the oven structure support frame (buck tay) beam (15).

Also. According to FIG. 5, the components of the noxious gas (a) generated from the door 12 of the carbonization chamber 10 of the coke oven are a dust containing gas and dust together, which is a primary cleaning separation means for combustion. A device 40 is provided to engage with the (35) inlet side of the collection line.

The structure of the device is that the hopper type outline and the inlet side are connected to the venturi tube line 40-1, the outlet side line 40-6 is connected to the hopper center side, and the inner hopper has a predetermined level of cleaning liquid 40-3. Replenished. It is equipped with a manual supplement valve 40-4, a level gauge 40-2, and a drain manual valve 40-5 for replenishing and treating the cleaning liquid, and the waste washing liquid is transferred to the sedimentation basin 100, which is a wastewater treatment facility. The cleaning liquid is manually replenished by a level gauge, and after being used for a period of time, the turbidity is evaluated and then manually drained.

In the above operation, the impregnated gas passing through the venturi line 40-1 connected to the collecting line 35 is changed to a high-speed impregnated gas according to the jet flow phenomenon and is refined while being sprayed on the front face of the cleaning liquid 40-3. The dust and gas in the impregnated gas are brought into contact with each other to allow the gas to escape to the outlet line 40-6 after the separation action.

Meanwhile, as a device control means for collecting harmful gas, a blower 50 for rotating a positive pressure (+) at a negative pressure (−) and a rotational adjustment are provided at one end of the outlet line 40-6 of the venturi scrubber. Inverter control motor 60 is installed to control the collection of harmful dust intake pressure in a plurality of dust collection hood devices 30, and a pressure sensor 50-4 for total pressure control is installed at the front of the blower. When the pressure control is poor, the emergency damper 50-3 for preventing the burnout of the control motor is installed to allow safe operation.

In addition, as shown in Figure 6, the blower 50, the outlet transfer line 50-1 and the gas collecting pipe 70 is installed to the interconnection, and the role of the collecting pipe as a harmful gas reservoir (pressure sensor of the collecting pipe ( 70-6) is installed and the control motor 60 is stopped when the proper pressure is over. In addition, one side of the collecting pipe is provided with a combustion supply branch pipe 70-1, which is separated into two in one line and combined with the upper chamber holes 80-1 and 80-2 of the combustion chamber, and each of the separated branch pipes has an electric control valve ( 70-2, 70-3, combustion chamber 80, and combustion detection differential pressure pressure sensors 70-4, 70-5 are installed to operate the output signal from the differential pressure sensor and the electric valve to operate the collecting pipe 70. Control the supply of harmful gases to the combustion chamber.

Further, as shown in FIG. 6, the noxious gas incineration means is completely incinerated by using the heat of the combustion chamber 80 of the waste gas line of the high temperature (1250 ° C.) two-stage combustion installed in the coke oven. Odd number 80-1 as a pair of combustion chamber structures. Combustion condition consists of even-numbered and even-circular combustion every 20 minutes by reversing system which is oven combustion method. It is a two-stage combustion method which minimizes heat loss and keeps the temperature uniform. Complete combustion control by According to this combustion method, when the odd combustion chamber burns for 20 minutes, the waste gas is discharged to the even combustion chamber, and when the even combustion chamber burns for 20 minutes, the waste gas is discharged to the odd side, and the combustion side is always positive pressure (+) 80-1, waste gas. The negative side (-) 80-2 acts on the side.

In the present invention, when the noxious gas is introduced into the upper hole 80-2 of the combustion chamber in which the negative pressure is generated, the noxious gas is combusted in the process of passing through the combustion chamber hole 80-2 like waste gas in two stages of combustion. After the complete combustion to the final combustion equipment waste stool to be treated with a chimney (17) installed in the oven.

Therefore, the noxious gas collected in the collecting pipe 70 is the electric valves (70-2, 70-3) of the negative pressure (-) is generated by the differential pressure sensor (70-4, 70-5) for the line control connected to the combustion chamber When the noxious gas is supplied and the control motor 60 for capture is stopped, the electric valves 70-2 and 70-3 are controlled to be blocked by the interlock condition.

Therefore, when the negative pressure side sensors 70-4 and 70-5 always reach the target values by the output signal of the control motor 60, the electric valves 70-2 and 70-3 are operated by the automatic control condition. Hazardous gases were collected and incinerated to be treated in a chimney installed in an oven.

On the other hand, the automatic control means according to the harmful gas treatment device configuration of the coke oven, the automatic control panel 90 is installed for the automatic control from the collection process to the incineration control in the above-described device means. According to the simple configuration, when noxious gas is detected in the gas detector 33 attached to each single oven dust collection hood of the coke oven, the hood blocking electric valve 32 is opened and closed and the rotation control inverter control motor 60 is detected. ) Is activated. Thereafter, the harmful gas is primarily collected through a venturi scrubber, and then the harmful gas is collected in the collecting pipe 70 and the collected harmful gas is supplied to the combustion chamber to be incinerated at a high temperature in the combustion chamber.

The present invention made up of such a configuration works as follows.

7 is an operation control flowchart for performing a fugitive gas combustion process of the coke oven door according to the present invention.

Referring to FIG. 7, the control action of the carbonization chamber door noxious gas incinerator of the coke oven is set to the target value of the gas detector 33 attached to each single oven dust collecting hood of the coke oven. When noxious gas is detected at the target value, the hood blocking electric valve 32 is opened and closed, and the rotation control inverter control motor 60 is started continuously. At the same time as collecting harmful gas, the hazardous gas is collected in the collecting pipe 70 after separation through the venturi scrubber 40, and the harmful gas collected in the collecting pipe 70 is collected in the branch pipe 70-1 connected to the combustion chamber. ), The electric valves (70-2, 70-3) on the generating side that reach the target value "-K" mmH ₂ 0 of the line control differential pressure detection sensors (70-4, 70-5) are always open. Control of combustion chamber combustion conditions and feed gas conditions is consistent.

In addition, when the gas detector is less than the target value, the hood electric valve 32 is shut off, and when the control motor is stopped, collection is impossible and the supply control electric valves 70-2 and 70-3 of the rear end collecting pipe are blocked. Do it. In addition, when noxious gas is normally collected, the structure of the coke combustion chamber is composed of an odd number 80-1 and an even number 80-2 as a pair, and the combustion conditions are determined by the combustion chamber structure of the reversing system which is an oven combustion method. According to this, the harmful gas supply is also circulated and controlled alternately every 20 minutes by the differential pressure sensors 70-4 and 70-5 in accordance with the combustion conditions.

On the other hand, the rotation control inverter control motor 60 is a condition that the rotation speed is automatically adjusted in proportion to the number of sensors 33 sensed by the hood 30, the above conditions are a lot of gas detection 33 If there is a lot of hood opening and the suction force is dropped, the rotation speed is adjusted to match the proper suction input, so that the blower rotational force increases, the suction force increases, and if the hood opening is small, the suction force load becomes greater than the proper suction force.

Therefore, for efficient control, a proper pressure sensor is provided at the front end of the blower 50 to maintain an appropriate total pressure. When the total pressure sensor is equal to or greater than the appropriate pressure (K) mmH ₂ 0, an emergency damper 50- 3) is operated to prevent the control motor load, and if the total pressure sensor is less than the appropriate pressure (set pressure) "K" mmH ₂ 0, the rotation speed is controlled to increase until reaching the appropriate pressure.

In addition, the purpose of maintaining the proper suction pressure is that when the impregnated gas flow rate is not met in the course of passing through the venturi scrubber device 40, which is the primary cleaning separation means, the impregnated gas is collected as it is and is collected as it is. When supplying, incombustible phenomenon may occur, so the proper pressure sensor controls the control motor to maintain the proper pressure "K" mmH ₂ 0 at all times above or below the proper pressure.

As described in detail above, the fugitive gas combustion system of the coke oven door according to the present invention detects and collects harmful gases emitted into the upper part of the carbonization chamber door, and incinerators are completely incinerated by using a combustion chamber equipped in the coke oven. It can prevent the problem of air pollution to protect the living environment, which is emerging seriously externally, and can provide productivity improvement through clean factory management.

Claims (1)

The dust collection hood 30 and the venturi tube laryngeal line 31 which are the same as the carbonization chamber 10 of the coke oven and are located on the upper left and right single doors 12-1 and 12-2 of the carbonization chamber 10. ), A shut-off opening / closing electric valve 32 and a plurality of hooded automatic gas detection sensors 33 in an integrated structure, and a main feed pipe 34 for transporting which is connected to the plurality of hood lines 31. 34-1) is formed in the same length by the structure of the oven and are collected on the left and right side (12-1, 12-2) side of the collecting means installed on the horizontal structure of the upper side of the support frame beam (15) and; The combined collection line 35 is configured to extend toward the oven structure end platform 36, and the venturi scrub unit 40, 40-1, 40-2, which is a cleaning separation device as a primary separation means of the inlet part of the line, 40-3,40-4,40-5,40-6) to separate the impregnated gas, and the blower 50 is provided at one side connected to the venturi scrubber outlet line 40-2. A rotation control inverter control motor 60 is provided, and a total pressure sensor 4 and an emergency damper 50-3 for controlling the control motor are provided to control the hazardous dust-containing gas a of the oven door 12 at a constant pressure. Control device means for collecting, primary separating and braking; The discharge transfer line 50-1 and the gas collecting pipe 70 are interconnected to the outlet side of the blower 50 so as to be collected in the collecting pipe, and one side of the collecting pipe is separated into two in one line, and the upper part of the combustion chamber upper hole 80-1, 80-2) is provided with a combustion branch pipe (70-1), each of the separated branch pipes, the electric control valves (70-2, 70-3), the combustion chamber 80 and the combustion detection differential pressure sensor (70-) 4,70-5), and senses the target value "K" mmH ₂ O of the high temperature waste gas exhaust combustion chamber in two stage combustion by the differential pressure sensor, and the electric control valve (70-2,70) above the detected combustion chamber. -3) an oven door noxious gas incineration means for opening the noxious gas to be treated with the chimney 17 provided in the oven after complete combustion while passing through the combustion chamber like the waste gas in the two stage combustion; And It is equipped with an automatic control panel 90 for the control operation of the apparatus included in each of the above means, the sequential to be processed from the initial gas detection to capture, primary separation, secondary collection, after supply to the second stage combustion chamber and incineration Fugitive gas combustion system of the coke oven door, characterized in that it comprises a control means for controlling the control.