KR101848785B1 - Sludge treating apparatus - Google Patents

Abstract

A sludge treating apparatus according to one embodiment of the present invention comprises: a dry type dust collector connected to a blast furnace; a wet type dust collector connected to the dry type dust collector via a first pipe; a degassing tower connected to the wet type dust collector via a second pipe; a thickener pond connected to the degassing tower via a third pipe; a settling tank connected to the thickener pond via a fourth pipe; and a solidification device connected to the settling tank via a fifth pipe, wherein the solidification device comprises: a sludge tank connected to the fifth pipe; a chemical treatment tank connected to the bottom of the sludge tank; and a drum filter portion connected to the chemical treatment tank via an induction pipe.

Description

[0001] SLUDGE TREATING APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge treatment apparatus, and more particularly, to an apparatus for treating sludge generated while treating blast furnace gas generated in a blast furnace.

Generally, the blast furnace gas cleaning process that processes the blast furnace gas generated through the reduction process of the iron ore that is charged into the blast furnace collects the major dust dust through the dust catcher, and collects the dust dust through the wet dust collector (bischoff scrubber) Can be removed.

Among them, the dust collecting in the wet dust collector is made such that the dust contained in the water droplets and the blast furnace gas is aggregated and discharged in the form of sludge when the collected water is sprayed in the form of mist in the wet dust collector using spray nozzles.

The discharged sludge is introduced into a thickener pond through a pipe, and is then settled. Overflowed water is stored in a settling tank. The water thus stored is again used as a condensate of the wet dust collector and circulated.

At this time, the sludge accumulated in the settling tank is stopped at the time of regular repair and collected by using manpower and equipment. Therefore, there is a problem that the scale in the piping is formed due to the sludge accumulated until the facility is stopped, so that the collected water does not move properly or the cleanliness of the collected clean gas is lowered.

Accordingly, the present invention provides a sludge treatment apparatus capable of quickly managing the quality of the collection water and minimizing the clogging of the piping to which the collection water is supplied.

A sludge treatment apparatus according to an embodiment of the present invention includes a dry dust collector connected to a blast furnace, a wet dust collector connected to a dry dust collector and a first pipe, a digging tower connected to a wet dust collector and a second pipe, A settling tank connected to the fourth pipe by a Siknerford, a fourth pipe connected to the third pipe, and a solidifying device connected to the settling tank by a fifth pipe, and the solidifying device includes the fifth A sludge tank connected to the pipe, a chemical treatment tank connected to the lower portion of the sludge tank, and a drum filter unit connected to the chemical treatment tank and the induction pipe.

The fifth pipe may be connected to a sludge suction device for sucking sludge in the settling tank.

The sludge tank may further include a main body in which the sludge is stored in a closed state, a vacuum pump located at a lower portion of the main body and connected to the main body of the sludge tank, have.

The chemical treatment tank includes a stirring device for stirring the inner sludge of the chemical treatment tank, a medicine supply part for supplying the medicine into the chemical treatment tank, and a drain pipe formed on one side wall of the chemical treatment tank, And the inlet pipe of the induction pipe may be located at the outlet of the flow pipe.

The induction pipe may be connected to a discharge port located below the chemical treatment tank.

The drum filter unit is installed in a storage tank and a storage tank connected to the outlet of the induction pipe. The drum filter unit includes a drum filter having a plurality of holes, a filter cloth installed on the outer surface of the drum filter, a hollow shaft installed in the drum filter, .

A sixth pipe connecting the settling tank and the wet dust collector, and a specific gravity sensor installed in the sixth pipe.

It is possible to quickly grasp the state of the collection water using the sludge treatment apparatus as in the present invention and minimize the clogging of the piping for supplying the collection water by treating the sludge.

Therefore, the dust collecting ability of the wet dehumidifier can be improved.

1 is a view for explaining a sludge treatment apparatus according to an embodiment of the present invention.
Fig. 2 is a view showing the solidifying device of Fig. 1;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, since the sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for convenience of explanation, the present invention is not necessarily limited to those shown in the drawings.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. In the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggerated. Whenever a portion such as a layer, film, region, plate, or the like is referred to as being "on" or "on" another portion, it includes not only the case where it is "directly on" another portion but also the case where there is another portion in between.

Also, throughout the specification, when an element is referred to as "including" an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, throughout the specification, the term "on " means to be located above or below a target portion, and does not necessarily mean that the target portion is located on the image side with respect to the gravitational direction.

Hereinafter, a sludge treatment apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a view for explaining a sludge treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a view showing the solidification apparatus of FIG.

1, the sludge treatment apparatus according to the present invention includes a dry dust collector 100 connected to a blast furnace, a blast furnace, a wet dust collector 200 connected to the dry dust collector, a degassing tower 200 connected to the wet dust collector, A settling tank 500 connected to a synch pond 400 and a settling tank 500 connected to a settling tank 500. The settling tank 500 is connected to a settling tank 500, (600) and a pipe (L) connecting them. A valve (V) may be installed in each of the pipes (L).

The blast furnace 10 is a furnace in which raw iron ore is charged and melted and reduced into pig iron.

On the upper part of the blast furnace (10), there is an open hopper (11) storing raw materials or fuel to be charged into the blast furnace (10). The raw material or fuel stored in the open hopper 11 is charged into the blast furnace 10 through the open charging process. Hot air flows through the tuyere under the blast furnace (10).

The fuel (for example, cokes) introduced into the blast furnace 10 is combusted by reaction with oxygen to generate a hot gas (hereinafter referred to as "blast furnace gas"). The blast furnace gas is in contact with the iron ore charged into the blast furnace 10 while rising in the furnace. In the furnace, the iron ores that receive heat by contact with high temperature blast furnace gas are melted and reduced by molten iron.

The molten reduced molten iron in the blast furnace 10 is stored under the furnace and discharged to the outside of the furnace through a tap hole at regular intervals. The blast furnace gas rising to the upper portion of the blast furnace 10 is discharged to the outside of the blast furnace 10.

The blast furnace gas discharged from the blast furnace 10 contains a large amount of dust, and the dust collectors 100 and 200 remove dust from the blast furnace gas discharged from the blast furnace.

The dry dust collector 100 is a dry dust collector such as a dust catcher. The dust particles having a large particle size are accumulated and removed by gravity sedimentation, and the small particle dust having a relatively small particle size is transferred to the wet dust collector 200 .

The wet type dust collector 200 is for removing the small dust particles of the blast furnace gas generated in the blast furnace process and may be introduced into the wet dust collector through the dry dust collector 100 in a state where the dust dust is removed.

The wet dust collector 200 may be provided with a plurality of nozzles 22 for spraying mist-like collecting water. When the dust collecting water is injected through the nozzle 22, the float 24 adjusts the amount of opening of the concentric rotary type flow control valve 25 in conjunction with the water collecting head internal diameter of the wet dust collector.

The flow control valve 25 is connected to a degassing tower 300 to regulate the flow rate of the collecting water discharged from the wet type dust collector 200 and transfer it to the digging tower 300.

When the predetermined number of floats is equal to or greater than the predetermined water level H, the flocculated water introduced into the digging tower 300 flows through the inner tube 31 of the digging tower 300 and falls into a plurality of friction plates 32 And is discharged to the outside and transferred to the synerpond 400.

The Sikner pond 400 is for sedimenting the dust contained in the sediment. The sludge is separated from the water by putting the flocculant into the sediment, and the concentrated sludge is deposited on the bottom of the Sikener font 400, 500).

The settling tank 500 is a place where the water delivered from the Sikner font 400 is stored. The suspended substances contained in the water can be settled and concentrated to the bottom by the sludge 51.

The water stored in the settling tank 500 is used as the water for collecting the wet dust collector and can be supplied to the wet dust collector through the pipe L provided with the pump 52. A specific gravity detecting sensor 53 is installed in the piping LL connected to the settling tank 500. The specific gravity detecting sensor 53 measures the specific gravity of the collected water in the pipe LL, and the solidifying device can be operated in accordance with the measured specific gravity.

A detection sensor 54 for measuring the sludge level is provided in the settling tank 500 and the detection sensor 54 can be interlocked with the collection and inhalation device 55.

The collection and suction device 55 is connected to the vacuum sludge tank 62 of the solidification device 600 through the sludge transfer pipe L1 and is connected to the sludge transfer pipe L1, A valve V1 may be provided. The collection and inhalation device 55 may be movably installed at the upper portion of the settling tank 500 in a sliding structure.

The solidifying apparatus 600 includes a vacuum sludge tank 62, a chemical treatment tank 64, and a drum filter unit 66.

The vacuum sludge tank 62 has a closed structure, and includes a main body 62a for storing sludge, and a discharge port 64a connected to a lower portion of the main body and narrowed downward. A discharge valve V2 may be installed at the discharge port 64b.

A level switch S1, a vent valve V3 and a vacuum pump 71 may be installed on the upper portion of the vacuum sludge tank 62. [

The vacuum pump 71 may be a vacuum pump and is connected to the vacuum sludge tank 62 through a pipe L2 and a valve V4 may be installed in the pipe L2. The vacuum pump 71 maintains the inside of the vacuum sludge tank 62 in a vacuum state so that the sludge immersed in the settling tank 500 is discharged through the collection and suction device 55 and the sludge transfer pipe L1 So that it can be transferred into the vacuum sludge tank 62.

The level switch S1 is for measuring the amount of sludge in the vacuum sludge tank 62 and blocks the valve V1 when the sludge is above a certain level. The vent valve V3 releases the vacuum of the vacuum sludge tank 62 so that the sludge in the vacuum sludge tank 62 can be discharged.

On the other hand, the discharge port 62b of the vacuum sludge tank 62 is connected to the chemical treatment tank 64.

The chemical treatment tank 64 may include a main body 64a for storing the sludge and a discharge port 64b for discharging the sludge to the lower portion of the main body 64b. The discharge port 64b may include a valve V5 . An agitator 6 connected to the external motor M is installed at the center of the main body 64a of the chemical treatment tank 64 and chemicals can be supplied from the medicine supply unit 65 through the pipe L3. A valve V6 may be provided in the pipe L3. The medicine supplied to the chemical treatment tank 64 may be a medicine for coordinating the suspended substances in the chemical treatment tank 64.

A level switch S2 may be provided on the top of the chemical treatment tank 64. The level switch S2 detects whether the sludge transferred from the vacuum sludge tank 62 maintains a predetermined level, And the agitator S2 is operated. Although the agitator S2 may be set to operate in synchronization with the level switch S2, the agitator S2 may receive a sensing signal (e.g., an alarm signal) from the level switch S2, have.

The chemical treatment tank 64 is provided with a sidewall pipe 72 for allowing sludge that has been coagulated by the chemical treatment to flow to the drum filter unit 66 along the induction pipe L4. A valve V7 may be installed in the induction pipe L4 adjacent to the drum filter unit 66. [

The drum filter unit 66 is connected to a water tank 73 connected to the discharge port of the induction pipe L4, a drum filter 74 installed in the storage tank, a hollow shaft 75 rotating the drum filter, and a hollow shaft 75 And a vacuum pump 77 provided in the vacuum pump.

The drum filter 74 may be installed so as to be submerged in the water storage tank 73 and the sludge transferred through the induction pipe L4 is stored in the water storage tank 73. A stirrer (not shown) is provided in the water storage tank 73 to prevent sedimentation of the sludge in the water storage tank 73.

The drum filter 74 is connected to a hollow shaft 75 rotated by a motor M, and a plurality of flow paths are formed on an outer circumferential surface thereof, and a filter cloth (not shown) is attached thereto.

One side of the hollow shaft 75 may be connected to the vacuum tank 76 and the vacuum pump 77 through a pipe. When the vacuum pump 77 is operated, a plurality of air inflow passages formed on the outer circumferential surface of the drum filter 74 through the hollow shaft 75 and suction air passing through the filter cloth pass through a flow path formed on the outer circumferential surface of the hollow shaft 75, .

The sludge which has not passed through the filter cloth due to the vacuum pressure is left on the filter cloth, the water that has passed through the filter cloth is transferred to and removed from the vacuum tank 76, and the solidified sludge is left on the filter cloth. The vacuum tank 76 separates the air and the water sucked by the vacuum pump 77, and the water can be filtered and reused.

In order to remove the solid sludge placed on the filter cloth, a separator 78 formed in a curved shape in the form of a blade may be provided. The separator 78 may be connected to a device (not shown) capable of adjusting the interval so that the filter cloth attached to the outer circumferential surface of the drum filter 74 is not damaged.

The operation of the collecting water treatment apparatus according to the present invention is performed when the specific gravity of a certain standard or more is detected in the sludge detection sensor 53 provided in the pipe LL for supplying the collected water from the settling tank 500 to the wet type dust collector 200 do.

The valve V2 of the vacuum sludge tank 62 and the sludge collecting line valve V1 are closed and the vacuum pump 71 is activated when the specific gravity above a certain standard is detected by the detection sensor 53. [ Thereafter, when the vacuum pump 71 is stabilized, the sludge 51 of the settling tank 500 is opened through the collection and suction device 55 and the sludge transfer pipe L1 by opening the sludge collection line valve V1 62).

When the sludge of the vacuum sludge tank 62 is collected and the collected amount becomes a certain level or more, the valve V3 of the pipe L2 detected by the level switch S1 and connected to the vacuum pump 71 is closed, It stops.

Thereafter, when the vent valve V3 of the vacuum sludge tank 62 and the valve V2 of the discharge port 62b are opened, the sludge is transferred to the chemical treatment tank 64, and at the same time, The valve V8 is opened to supply the medicine to the chemical treatment tank 64. [

When the amount of sludge in the chemical treatment tank 64 becomes equal to or higher than a certain level, the level switch S2 detects this and activates the stirrer 6 to dilute it. When the stirrer 6 is operated, the sludge floats and reacts with the chemicals to increase the size of the suspended material. The level of the chemical treatment tank 64 is increased by the continuously supplied sludge to rise to the sidewall pipe 72 so that the sludge flows over the sidewall pipe 72 and flows along the induction pipe L4 to the drum filter unit 66. [ To the water tank (73).

When the sludge flows into the water storage tank (73), the vacuum pump (77) is operated to adsorb the sludge to the surface of the drum filter (74) by the vacuum pressure to solidify the sludge.

This process is repeated until the sludge level of the settling tank 500 drops to a normal level. When the level of the sludge reaches the normal level, the valve V1 installed at the collection intake port is closed and the sludge collection of the settling tank 500 is stopped Stop. The sludge left below the overflow pipe 72 of the chemical treatment tank 64 opens the discharge valve V5 and transfers it to the water storage tank 73 through the induction pipe L4 to solidify it.

Thereafter, after the solid sludge attached to the drum filter 74 is removed, the drum filter 74 is washed and then the drum filter 74 is stopped.

As in the embodiment of the present invention, when the specific gravity detecting device is installed in the piping for delivering the collected water to the wet type dust collector from the settling tank, it is possible to measure the sludge concentration of the collecting water passing through the piping in real time. Therefore, by removing the sludge in the settling tank quickly based on the specific gravity measured in real time, it is possible to reduce the clogging of the pipe due to the sludge included in the collection water.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

6: stirrer 10: blast furnace
11: open hopper 22: nozzle
51: Sludge 52: Pump
53, 54: detection sensor
55: Collection suction device
62: Vacuum sludge tank
64: chemical treatment tank 65: chemical supply unit
66: drum filter unit 71, 77: vacuum pump
73: Water tank 76: Vacuum tank
78: separator 100, 200: dust collector
300: Digging Tower 400: Sikenerfond
600: solidifying device

Claims (7)

A dry dust collector connected to the blast furnace,
A wet dust collector connected to the dry dust collector through a first pipe,
A digging tower connected to the wet dust collector through a second pipe,
A sicer pond connected to the digging tower by a third pipe,
A settling tank connected to the Siknerford and the fourth pipe,
A solidifying device connected to the settling tank by a fifth pipe,
A sixth piping connecting the settling tank and the wet scrubber, and
The specific gravity sensor installed in the sixth pipe
Lt; / RTI >
The solidifying device is operated in accordance with the specific gravity measured by the specific gravity sensor. The solidifying device includes a sludge tank connected to the fifth pipe, a chemical treatment tank connected to a lower portion of the sludge tank, The drum filter section
And a sludge treatment unit. delete The method of claim 1,
The fifth pipe is connected to a sludge suction device for sucking sludge in the settling tank,
Wherein the sludge suction device moves the upper portion of the settling tank with a sliding structure. The method of claim 1,
Wherein the sludge tank includes a main body in which the sludge is stored in a closed state, and a discharge port located at a lower portion of the main body and narrower in width toward the chemical treatment tank,
The sludge tank is connected to the main body of the vacuum pump
Further comprising: The method of claim 1,
The chemical treatment tank
An agitating device for agitating the internal sludge of the chemical treatment tank,
A chemical supply unit for supplying the chemical into the chemical treatment tank,
Wherein the chemical treatment tank is formed on one side wall of the chemical treatment tank,
Further comprising:
Wherein the inlet pipe of the induction pipe is located at an outlet of the flow pipe. The method of claim 5,
Wherein the induction pipe is connected to an outlet located at a lower portion of the chemical treatment tank. The method of claim 1,
The drum filter unit includes a reservoir connected to an outlet of the induction pipe,
A drum filter installed in the reservoir and having a plurality of holes,
A filter cloth provided on the outer surface of the drum filter,
A hollow shaft installed in the drum filter for rotating the drum filter,
And a sludge treatment unit.

Images