JPH08170080A - Prevention of dust development from coke wharf and system therefor - Google Patents

Abstract

PURPOSE: To effectively prevent dust development when coke is unloaded to a coke wharf and coke is cut out from the coke wharf. CONSTITUTION: A coke unloading port 11, a gas suction port 12 where the upper part of a lower part member is opened slantly upward outside a conveyer 7 for unloading coke cut out by a relevant device bent toward the coke wharf side, and the whole coke wharf 3 except or including the coke conveyer 7 are covered with a cover having a ceiling 14 whose opposite side to a fire extinguishing truck 1 is tilted upward; and within the time interval from unloading coke to the coke wharf 3 to finish coke cutting out, water is sprinkled from a nozzle 16 on the upper part of the coke unloading port 11 to make a water curtain, and concurrently, a dust-contg. air on the upper part of the coke wharf is sucked into the gas suction port 12 and scrubbed through the water curtain-ejector effect owing to water sprinkling from a nozzle 17 above the gas suction port 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing dust generation in a coke wharf which prevents scattering of fine coke powder generated during the process of disposing of the coke extinguished by wet fire in the coke wharf in the production of coke and before cutting out the coke. And equipment.

[0002]

2. Description of the Related Art Wet extinguishing of red hot coke that has been dry-distilled in a coke oven is carried out by extruding red hot coke from a carbonization chamber by an extruder and loading it on a fire extinguisher via a coke guide car. Place it inside, sprinkle a large amount of water from the top to cool and extinguish the red hot coke, then drain the water, then move the fire engine to the predetermined position on the coke wharf and open the side wall of the fire engine or the bottom plate. Coke is wholesale to Coke Wharf by tilting. The coke wholesale to the coke wharf slides off the surface of the coke wharf with an inclination angle of about 30 °, collides with the gate on the cut-out feeder arranged along the lower end of the coke wharf, and stands still, so coke fine powder is generated by the impact. In addition, when cutting coke from the coke wharf, the feeder is activated and rotated to open the gate to sequentially cut coke on the belt conveyor, but coke fine powder is also generated due to collision of cokes when falling on the belt conveyor.

[0003] When the above-mentioned wet fire extinguished coke is wholesaled in a coke wharf and when the coke is cut out from the coke wharf, fine coke generated due to a drop impact is
Even if it is wholesaled in coke wharf, it is not only entrained by the rising air current of hot coke to become dust-containing air and deteriorating the surrounding environment, but it also scatters in the surrounding suburbs together with powdered coke accompanied by water vapor during wet fire extinguishing. It is well known to cause dust pollution.

As a measure to prevent dust generation from the coke wharf, a suction hood for sucking dust-containing air and a suction duct provided on the upper part of the coke wharf are connected to each other through a valve mechanism that can be opened and closed, and the dust placed on the coke guide is mounted. A suction hood for suction of the contained air is connected to the suction duct, which is communicated by a connecting mechanism, and the duct is connected to a dust removing device, which is caused by a drop impact of red hot coke onto a fire engine. , A method of alternately sucking dust coke entrained in an ascending airflow of red hot coke and dust from coke wharf by utilizing the difference in operation timing (JP-B-51-40562), exhaust of coke wharf and fire extinguisher The structure of the tower is integrated, and a coke cutting device is installed along the lower end of the coke wharf, and a water injection area is located above it. Only to suppress the flow rate of exhaust of water vapor or the like passing through the exhaust tower by moving the injection zone sequentially slowly red hot coke unloaded in Kokuwafu below 2m / sec,
An apparatus (Japanese Patent Publication No. Sho 53-36481) provided with a wet electrostatic precipitator consisting of a discharge electrode and a dust collector in an exhaust tower has been proposed.

[0005]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the method disclosed in Japanese Patent No. 562, since the lower part of the suction hood is opened, it is very difficult to secure a suction wind speed sufficient to completely capture the dust-containing air, and dust due to dust collection leakage is generated. It is thought to be scattered. Further, this method requires enormous equipment cost to secure a sufficient suction wind speed for trapping the dust-containing air, and is substantially difficult to install. In addition, Japanese Patent Publication Sho 53-3
The method disclosed in Japanese Patent No. 6481 requires not only large facility remodeling but also huge facility investment,
Since the red-hot coke is extinguished slowly, there is a drawback that ashing occurs due to combustion of the red-hot coke.

The object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to effectively prevent dust generation after the wet fire extinguished coke is wholesaled to the coke wharf and then the coke is cut out and completed. It is to provide a dust prevention method and device.

[0007]

[Means for Solving the Problems] The inventors of the present invention have made extensive studies to achieve the above object. As a result, the entire cork wharf is covered with a cover leaving necessary openings to prevent dust from scattering, and dust-containing air is sucked from one location of the openings to wash and remove the dust, thereby reducing the surrounding environment and surrounding areas. It was confirmed that it was possible to prevent dust scattering from the coke wharf to the present invention, and arrived at the present invention.

That is, the present invention relates to a method for preventing dust generation from a coke wharf from the time when the wet fire extinguished coke is wholesaled to the coke wharf until the end of cutting out the coke, and the coke wholesale port and the coke cut out by the coke cutting device. The gas suction port with the upper part of the lower part that opens diagonally upward outside the conveyor for carrying out the cork wharf and the entire coke wharf excluding or including the coke conveyor part is inclined upward on the side opposite to the fire extinguisher. Cover with a cover that has a ceiling, and from the time the coke is unloaded to the coke wharf to the end of cutting out the coke, sprinkle water from the sprinkling nozzle above the coke wholesale port to form a water curtain, and from the sprinkling nozzle above the gas suction port. Due to the water curtain and ejector effect of watering, A dust preventing method from Kokuwafu, characterized in that Kuwafu the top of the dust-containing air sucked cleaning the gas suction port.

In addition, in the dust prevention device from the coke wharf from the time when the wet fire extinguished coke is wholesale to the coke wharf until the end of cutting out the coke, the coke wholesale port opened along the upper end of the coke wharf and the bottom end of the coke wharf. Excluding or including the gas suction port whose upper part is curved toward the coke wharf and the lower part of the lower part of the conveyor that opens diagonally above the conveyor for carrying out the coke cut out by the coke cutting device A cover having a ceiling inclined upward on the side opposite to the fire extinguisher that covers the entire coke wharf, a water spray nozzle disposed along the upper portion of the coke wholesale port, a water spray nozzle disposed along the upper side of the gas suction port, and the water spray. A collection gutter that collects water spray from the nozzle and the water collected by the collection gutter on the gas suction port from the pit. A circulation system for supplying the water spray nozzles,
A device for preventing dust generation from a coke wharf, comprising: an automatic control device for a fire extinguisher, which controls the timing of water sprinkling from each of the water sprinkling nozzles according to the work situation of the fire extinguisher and the work situation of the coke cutting device.

[0010]

According to the method of preventing dust generation from the coke wharf of the present invention, the upper portion of the lower part of the coke wholesale port and the lower part of the lower part of the conveyor, which is opened obliquely upward on the outside of the conveyor for carrying out the coke cut out by the coke cutting device, is curved toward the coke wharf side. Except for or including the gas suction port and the coke transporting conveyor part, cover the entire coke wharf with a cover that has a ceiling that slopes upward on the side opposite to the fire extinguisher, and between the time when the coke is cut out and the coke is cut out. , Sprinkle water from the sprinkler nozzle above the coke wholesale port to form a water curtain and at the same time, dust-laden air above the coke wharf is sucked and washed to the gas suction port by the water curtain ejector effect by sprinkling water from the sprinkler nozzle above the gas suction port. By wholesale coke to Coke Wharf Coke fines generated until the Kusu cut ends, can be almost completely washed off, it is possible to prevent deterioration of the surrounding environment, can prevent the scattering of dust-containing air to the surroundings region.

Further, the device for preventing dust generation from the coke wharf of the present invention is for carrying out the coke wholesaler opening along the upper end of the coke wharf, and the coke cut out by the coke cutting device arranged along the lower end of the coke wharf. Cover with a gas suction port whose upper part of the lower part that opens diagonally upward on the outside of the conveyor is curved toward the coke wharf side, and a fire extinguisher that covers the entire coke wharf excluding or including the coke transporting conveyor part, and the opposite side slopes upward A sprinkling nozzle arranged along the upper part of the coke outlet, a sprinkling nozzle arranged along the upper side of the gas suction port, a collection gutter for collecting sprinkling water from the sprinkling nozzle, and water collected by the collection gutter. The circulation system that supplies the water from the pit to the water spray nozzle above the gas suction port and the timing of water spray from each of the water spray nozzles By configuring with a fire extinguisher automatic control device that controls according to the business situation and the work situation of the coke cutting device, the coke wholesaler is located along the upper part of the coke wholesaler from the time the coke is quarried to the coke wharf until the end of the coke cutting. The water curtain can be formed by water sprinkling from the water sprinkling nozzle arranged as described above, and scattering of dust-containing air from the coke wholesale port can be prevented. Further, since the ceiling of the cover is inclined upward on the side opposite to the fire extinguisher, the dust-containing air moves to the gas suction port side along the ceiling and is sprayed from the sprinkler nozzle above the gas suction port to the curved member. Due to the water curtain ejector effect, it is removed by suction cleaning from the gas suction port.

Dust generated after the coke is emptied into the coke wharf is slid from the coke wholesale port onto the coke wharf as the opening of the side wall of the fire extinguisher or the tilting of the bottom plate starts as the opening of the fire extinguisher expands. But start
A large amount of coke slips off immediately after the fire extinguisher completes tilting, so a large amount of coke suddenly occurs due to the collision and drop impact on the gate on the coke cutting feeder, and the coke cutting continues, but It has been confirmed that the generation of dust is reduced about two and a half minutes after the completion of tilting. Therefore, the formation of the water curtain from the sprinkler nozzle on the upper part of the coke wholesale port is not completed until the tilting of the fire engine is completed.
About 0 seconds is sufficient. In addition, the suction cleaning of the dust-containing air on the upper part of the coke wharf by the water curtain ejector effect by the sprinkling from the sprinkling nozzle above the gas suction port sprinkles the entire amount for about 3 minutes from the completion of tilting of the fire extinguisher,
After that, about 1/2 watering is sufficient. In addition, since the water for forming the water curtain is circulated and used, in order to maintain the dust removal efficiency, fresh water is replenished at regular intervals, for example, about 20% is replenished every 5 kilns to discharge the precipitated coke powder. Is desirable.

The arrangement of the water spray nozzle above the coke wholesale port and the water spray nozzle above the gas suction port is 5 to 10 l / min above the coke wholesale port and 15 to 20 l / min above the gas suction port.
It is possible to control the amount of sprinkling water by installing two mining sprinkler nozzles and two water pipes and switching from two series to one series. As the sprinkling nozzle to be used, one that produces a wide-angle flat flow, for example, one that can sprinkle the flat flow at an angle of 50 ° is installed, which is advantageous because the number of installations and the amount of water spray can be reduced. The inclination angle of the cover ceiling covering the cork wharf in the present invention to the upper side on the side opposite to the fire extinguisher does not need to be too large, and is preferably 30 ° or less, and 5 to 10 ° is sufficient. Further, the gas suction port that is opened obliquely upward on the outer side of the conveyor for carrying out the coke cut out from the coke cutting device in the present invention does not need to be opened over the entire length of the coke wharf, and about half the length of the coke wharf is sufficient. is there. The curved member at the bottom of the gas suction port is curved to the cork wharf side because the water spray nozzle above the gas suction port sprinkles water on the curved member to obtain a water curtain ejector effect and prevent water from flowing into the cork wharf side. This is because

[0014]

【Example】

Embodiment 1 The details of the dust-prevention device of the present invention will be described below with reference to FIGS. 1 and 2 showing an embodiment. FIG. 1 is a perspective view for explaining the entire dust-generating prevention device of the present invention, and FIG. 2 is a side sectional view. FIG. 3 shows an example of the arrangement of water spray nozzles. (A) is a plan view, (b) is a front view In FIGS. 1 and 2, 1 is a fire engine, 2 is a rail of the fire engine 1, 3 Is a coke wharf, 4 is a drum of a feeder for cutting out coke 5 arranged along the lower end of the coke wharf, 6 is an opening / closing gate provided corresponding to the drum 4, 7
Is a conveyer for conveying coke, and after the drum 4 is activated, the cylinder 8 is operated to open the gate 6, and the coke 5 on the coke wharf 3 is sequentially cut out on the conveyer 7 by the rotation of the drum 4. It is configured to be transported to.

Reference numeral 11 denotes a coke wholesale port provided along the upper end of the coke wharf 3, reference numeral 12 denotes a curving member 13 having an upper portion that is opened obliquely above the coke cutting feeder and is curved toward the coke wharf 3, and is inclined toward the side opposite to the fire extinguishing car 1. Ceiling material 14
In the gas suction port formed between and, the periphery and the upper part of the coke wharf 3 are covered with a cover 15 except for the coke wholesale port 11, the gas suction port 12 and the conveyor 7. Reference numeral 16 is a water curtain forming water spray nozzle disposed along the upper portion of the coke wholesale port 11, 17 is a water curtain forming water spray nozzle disposed above the gas suction port 12, and is sprayed from the water spray nozzle 17. The water forms a water curtain and falls along the curved member 13,
At that time, the dust-containing air on the cork wharf 3 is sucked and washed by the gas suction port 12 by the ejector effect of the injected water, and the dust is washed and removed.

Reference numeral 19 is a drain gutter into which water sprayed from the sprinkling nozzle 17 flows, 20 is a circulation pit into which water collected in the drain gutter 19 flows, and 21 is a circulation pump for supplying water from the circulation pit 20 to the sprinkling nozzle 17. , 22 are circulation pits 20
It is a water supply pipe for supplying new water to the. 23 is a fire engine 1
A fire extinguisher control device that controls running, stopping and running of a sick body, sprinkling fire extinguishing, coke wholesale, and the like, although not shown, such as traveling position, traveling speed, traveling direction, and work information with the extinguishing vehicle 1. Information is exchanged. 24 is a watering nozzle 16,
Open / close valve (not shown) and circulation pump 2 for water pipe 17
1. A sprinkling control unit that controls an opening / closing valve (not shown) of the water supply pipe 22 opens / closes an opening / closing valve (not shown) of the water pipes of the water spray nozzles 16 and 17 and starts / stops the circulation pump 21 according to a command from the fire extinguisher vehicle controller 23. In addition, it is configured to control the opening and closing of an on-off valve (not shown) of the water supply pipe 22.

With the above-described structure, when the fire extinguisher 1 carrying out the fire extinguishing with a wet fire extinguisher (not shown) and having completed the draining of the coke is stopped at a predetermined position in front of the coke wharf 3, this is confirmed. A watering command is output from 23 to the watering controller 24. Sprinkling control unit 24
When a watering command is input from the fire engine control device 23,
The circulating pump 21 is started and the water spray nozzles 16 and 17
Open and close an on-off valve (not shown) on the water pipe of
Start watering from 6,17. Then, the fire extinguisher control device 23 outputs a tilt command to the fire extinguisher 1 to start tilting the bottom plate of the fire extinguisher 1. When tilting of the bottom plate of the fire engine 1 is completed, the coke 5 is transferred from the fire engine 1 to the coke wholesale port 1.
1 to fall into the cork wharf 3, slide down along the inclined surface of the cork wharf 3, collide with the lower gate 6, and stand still. The coke fines generated by the drop of the coke 5 on the coke wharf 3 and the collision with the gate 6,
It rises as it is entrained by the ascending airflow generated by the still hot coke.

A part of the dust-containing air is covered by the cover 15.
Since the entire coke wharf 3 is covered by the above, it moves toward the coke wholesale port 11 along the ceiling material 14 of the cover 15. However, the coke wholesale port 11 has a water curtain formed by the water spray from the sprinkling nozzle 16. Therefore, a part of the dust-containing air leaking from the coke wholesale port 11 is washed and the dust is washed and removed. In addition, the remaining dust-containing air that has moved to the gas suction port 12 side along the inclination of the ceiling material 14 is the water spray nozzle 1 provided above the gas suction port 12.
Due to the water curtain ejector effect of water sprayed from 7 and falling along the bending member 13, the gas is sucked and washed by the gas suction port 12 to remove dust by washing.

After the discharge of the coke from the fire extinguisher 1 is completed and the fire extinguisher 1 travels to the next kiln removal kiln, the fire extinguisher control device 23 outputs a coke cutting command to a coke cutting control unit (not shown). The conveyor 7 and the drum 4 are activated, and the gate 6 provided corresponding to the drum 4
The gate 6 is opened by the opening / closing cylinder 8. The coke 5 on the coke wharf 3 is sequentially cut out by the rotating drum 4, dropped and accumulated on the conveyor 7, and conveyed to the next step. In this case, the coke fine powder generated due to the fall and accumulation of the coke 5 on the conveyor 7 rises as dust-containing air and is jetted from the water spray nozzle 17 provided above the gas suction port 12 and along the bending member 13. Due to the ejector effect of falling water, the gas suction port 12
It is sucked and washed to remove dust.

Embodiment 2 As the water spray nozzle 16 and the water spray nozzle 17 of the above Embodiment 1, as shown in FIG.
2 lines of spray nozzles 31 that can spray a flat flow with an injection angle of 50 ° at a distance of mm are provided, and an automatic opening / closing valve 32 is provided in each line, and as shown in FIG. , The tilting of the bottom plate of the fire-extinguishing vehicle was started 5 seconds after the stop, and the tilting was completed 20 seconds later. Simultaneously with the completion of tilting, 3 kg / from the water spray nozzle above the coke wholesale port and the water spray nozzle above the gas suction port.
Water sprinkling was started at a water pressure of cm ² · G. After 20 seconds from the completion of tilting of the bottom plate of the fire extinguisher, the discharge of coke from the fire extinguisher was completed, so after 5 seconds, cutting out the coke from the coke wharf was started, and the sprinkling from the sprinkling nozzle above the wholesale coke outlet was stopped. However, almost no leakage of air containing dust from the coke outlet was observed.

After 140 seconds from the start of cutting the coke from the coke wharf, the amount of water sprayed from the spray nozzle above the gas suction port was reduced to 1/2, and further from the sprinkler nozzle above the gas suction port until the completion of cutting the coke from the coke wharf. Watering continued to stop. The total amount of water sprayed during this period was 7.2 Ton. In this case, it was confirmed that the amount of dust scattered due to the diffusion of dust-containing air from the coke wharf was significantly reduced to 10% or less compared to the conventional case.

[0022]

As described above, according to the present invention,
Dust scattering due to diffusion of dust-containing air from the cork wharf can be significantly reduced, and not only the surrounding environment can be improved but also dust scattering to the surrounding suburbs can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining an entire dust-prevention device of the present invention.

FIG. 2 is a side sectional view of the dust prevention device of the present invention.

3A and 3B show an example of an arrangement of watering nozzles used in Example 2, where FIG. 3A is a plan view and FIG. 3B is a front view.

FIG. 4 is an explanatory diagram of changes over time in a coke wharf dusting state and a sprinkling state of a coke wholesale port and a gas suction port in Example 2.

[Explanation of symbols]

 1 Fire Engine 2 Rail 3 Cork Wharf 4 Drum 5 Coke 6 Gate 7 Conveyor 8 Cylinder 11 Coke Wholesale Port 12 Gas Suction Port 13 Curved Member 14 Ceiling Material 15 Cover 16, 17, 31 Sprinkling Nozzle 19 Drain 20 Circulation Pit 21 Circulation Pump 22 Water supply pipe 23 Fire engine control device 24 Sprinkling control unit 32 Automatic opening / closing valve

Claims (2)

[Claims] 1. A method for preventing dust generation from a coke wharf from the time when the wet fire extinguished coke is wholesaled to the coke wharf until the end of cutting out the coke, and the coke wholesale port and the coke cut out by the coke cutting device are carried out. A gas suction port in which the upper part of the lower member that opens diagonally upward outside the conveyor for conveyance is curved toward the cork wharf side,
Cover the entire coke wharf, excluding or including the conveyor for conveying coke, with a cover that has a ceiling that slopes upward on the side opposite to the fire extinguisher. The water spray nozzle sprays water to form a water curtain, and the water-curtain ejector effect of water spray from the water spray nozzle above the gas suction port cleans the dust-containing air above the cork wharf to the gas suction port. How to prevent dust from cork wharf. 2. A dust prevention device from a coke wharf from the time the wet fire extinguished coke is wholesaled to the coke wharf until the end of cutting out the coke, in which the coke wholesale port opened along the top end of the coke wharf and along the bottom end of the coke wharf. Excluding or including the gas suction port whose upper part is curved toward the coke wharf and the lower part of the lower part of the conveyor that opens diagonally above the conveyor for carrying out the coke cut out by the coke cutting device A cover having a ceiling inclined upward on the side opposite to the fire extinguisher that covers the entire coke wharf, a water spray nozzle disposed along the upper portion of the coke wholesale port, a water spray nozzle disposed along the upper side of the gas suction port, and the water spray. A collection gutter that collects water spray from the nozzle, and the water collected by the collection gutter is sprayed from the pit above the gas suction port. An emission control system from a coke wharf, which comprises a circulation system for supplying water to the water nozzle and an automatic control system for the fire extinguisher for controlling the timing of water sprinkling from each of the water sprinkling nozzles according to the work situation of the fire extinguisher and the work situation of the coke cutting device. Dust prevention device.