KR20190122986A - Equipment for treating sewage sludge - Google Patents

Abstract

The present invention provides a sewage treatment facility including: a decanter which dehydrates supplied sewage sludge; a hopper in which sewage sludge discharged from the decanter is stored; a disposal apparatus which includes a decomposition unit receiving the sewage sludge, stored in the hopper, flown thereinto, and decomposing the sewage sludge therein through a composting process, and a stirring unit installed inside the decomposition unit and stirring the sewage sludge flown into the decomposition unit; a driving apparatus which is installed at one side of the disposal apparatus and drives the stirring unit; an air supply device which supplies air into the disposal apparatus; and a deodorizing apparatus which includes an electric deodorizing device installed in one side of the disposal apparatus and decomposing odorous gas generated inside the disposal apparatus by using electricity and a washing deodorizing device installed in one side of the electric deodorizing device and removing odorous gas generated inside the disposal apparatus by dissolving the odorous gas in liquid. According to the present invention, the sewage treatment facility enables the odorous gas generated from the disposal apparatus to be efficiently removed by including the deodorizing apparatus including the electric deodorizing device and the washing deodorizing device. Further, according to the present invention, the sewage treatment facility can improve operation efficiency of the facility by enabling a control unit to selectively control a flow path of the odorous gas supplied to the electric deodorizing device and the washing deodorizing device.

Description

Equipment for treating sewage sludge}

The present invention relates to a sewage sludge treatment plant, and more particularly, to a facility for dewatering and decomposing sewage sludge.

In general, sewage sludge means sediments produced during sewage treatment or water purification. Sewage sludge has a water content of less than 95% or a solids content of more than 5%, and is divided into fresh sludge removed from the initial clarifier and surplus sludge (activated sludge) removed from the secondary clarifier. Sewage sludge contains a large amount of organic matter, and these organic matters are susceptible to decay, and when decayed, there is a problem that odors are generated as well as harmful substances to the human body and the ecosystem. Thus, treating sewage sludge is a very important issue for humankind in preserving the ecosystem.

As related to the treatment of sewage sludge, Korean Patent No. 10-0407188 discloses a method and apparatus for treating sewage sludge.

In the conventional sewage sludge treatment method and apparatus, the sewage sludge is dewatered using a decanter of a centrifugal separation method, and then the sewage sludge is decomposed using a decay device. Here, the extinction device is to decompose the organic material through a composting process to decompose the organic material present in the sewage sludge using the aerobic microorganisms present therein.

At this time, according to the conventional sewage sludge treatment method and apparatus, organic matter present in the sewage sludge introduced into the extinguishing device is not effectively decomposed, so that a large amount of odorous gas is generated, as well as excessively for driving the entire apparatus. There is a problem that a lot of energy is consumed.

The present invention has been made to solve the above problems, an object of the present invention is to provide a sewage sludge treatment facility that can effectively remove the odorous gas generated from the extinction device.

The present invention is a facility for treating sewage sludge, comprising: a decanter for dewatering the supplied sewage sludge; A hopper in which sewage sludge discharged from the decanter is stored; The sewage sludge stored in the hopper is introduced into the inside and decomposed to decompose the sewage sludge existing therein through a composting process, and the agitator installed inside the decomposing part to stir the sewage sludge introduced into the decomposing part An extinction device comprising; A driving device installed at one side of the dissipation device to drive the stirring unit; An air supply device for supplying air into the vanishing device; And an electric deodorizer installed on one side of the quenching device to decompose malodorous gas generated in the quenching device using electricity, and installed on one side of the electric deodorizer and generated inside the quenching device. Provided is a sewage sludge treatment facility including a deodorizer including a deodorizer for dissolving and removing malodorous gas in a liquid.

The deodorizer is a water tank unit in which odorous gas is introduced into the water and the water is filled therein, and is installed in the water tank unit and receives power from the outside so that the water filled in the water tank unit is electrically supplied. And an gas supply unit installed in the water tank unit and discharging the malodorous gas supplied from the extinction device to the water tank unit.

The electrode unit may include a pair of electrodes arranged to be spaced apart from each other, and a pair of casings each having a groove formed on a surface of the side facing each other and accommodating the pair of electrodes therein.

The groove is formed in the outer circumferential surface of the casing along the vertical direction, the gas supply unit is disposed to be perpendicular to the pair of casings at the lower side of the pair of casings, and is supplied to the upper side from the extinction device. A discharge hole through which the malodorous gas received is discharged may be formed.

The washing deodorizer, the first collecting unit receiving the malodorous gas from the quenching device, the first water spraying unit for spraying water into the first collecting unit, and is installed on one side of the first collecting unit And a second collecting part receiving the gas passing through the first collecting part, and a second water spraying part spraying water into the second collecting part.

The extinction device further includes a sensor unit for measuring the concentration of the malodorous gas present in the decomposition unit, the deodorizer, supplying the malodorous gas discharged from the decomposition unit to the electric deodorizer and washing deodorizer The controller may further include a controller configured to selectively adjust an amount of malodorous gas supplied to the electric deodorizer and the washing deodorizer through the flow passage part based on the flow passage part and the measured value received from the sensor unit.

The flow passage part is connected to a first conduit connected to the disassembler, a second conduit connected to the first conduit and the electric deodorizer, and one end connected to a point at which the first conduit and the second conduit are connected to each other. And the third end connected to the other end of the washing deodorizer, and the deodorizing device is disposed at a point at which the first conduit, the second conduit, and the third conduit are connected, and receives a control signal from the controller. The apparatus may further include a valve unit controlling a flow path of the malodorous gas flowing from the first pipe line to the second pipe line and the third pipe line.

The control unit, when the measured value of the sensor unit is less than a predetermined first reference value, closes the second conduit and supplies the malodorous gas flowing into the first conduit to the third conduit, the measured value of the sensor unit When the first reference value is greater than or equal to the preset second reference value, the third duct is closed to supply the malodorous gas flowing into the first duct to the second duct, and the measured value of the sensor unit is set to a preset first value. When the value is equal to or greater than two reference values, the valve unit may be controlled to open both the second pipe and the third pipe to supply malodorous gas flowing into the first pipe to the second pipe and the third pipe.

According to the sewage sludge treatment plant according to the present invention, by providing a deodorizer including an electric deodorizer and a washing deodorizer, it is possible to efficiently remove the malodorous gas generated from the quenching apparatus. In addition, according to the sewage sludge treatment plant according to the present invention, by selectively controlling the flow path of the malodorous gas supplied to the electric deodorizer and the washing deodorizer by the control unit, it is possible to improve the operating efficiency of the facility.

1 is a view showing the sewage sludge treatment plant according to an embodiment of the present invention.
FIG. 2 is a view showing the electric deodorizer shown in FIG. 1.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Referring to FIG. 1, the sewage sludge treatment facility 1000 according to an embodiment of the present invention includes a decanter 1100, a hopper 1200, a pump 1300, a dissipation device 1400, a driving device 1500, And an air supply device 1600 and a deodorizer 1700.

The decanter 1100 separates and dehydrates the sludge present in the sewage through centrifugal separation. If the sludge contains a large amount of water, there is a problem that its handling and transportation is difficult. Therefore, the decanter 1100 may be said to operate to lower the moisture content in order to more easily treat the sludge present in the sewage. At this time, the decanter 1100 is preferably a screw type, but is not limited thereto.

The hopper 1200 is stored inside the sludge dehydrated through the decanter 1100 in a caked state. The pump 1300 transfers the sludge discharged from the decanter 1100 to the hopper 1200.

The dissipation device 1400 is to decompose sludge through a composting process, and includes a decomposition unit 1410, a stirring unit 1420, and a sensor unit 1430. The decomposition unit 1410 receives the sludge from the hopper 1200 and composts it. Composting means decomposing organic matter contained in sludge using aerobic microorganisms. The decomposition unit 1410 removes the sludge through this composting process.

The stirring unit 1420 is installed inside the decomposition unit 1410 and agitates the sludge introduced into the decomposition unit 1410. Accordingly, the stirring unit 1420 allows the aerobic microorganisms present in the sludge to be uniformly supplied with the air introduced into the decomposition unit 1410, so that the composting process is more smoothly inside the decomposition unit 1410. Make it happen.

The sensor unit 1430 measures the concentration of the malodorous gas present in the decomposition unit 1410.

The driving device 1500 is installed at one side of the dissipation device 1400 and drives the stirring unit 1420.

The air supply device 1600 supplies air into the vanishing device 1400. The composting process occurring inside the decomposition unit 1410 is characterized in that oxygen is continuously consumed. Accordingly, in order to maintain the oxygen concentration in the decomposition unit 1410 at an appropriate amount such that the composting process can be continuously performed in the decomposition unit 1410, the air supply device 1600 may perform the decomposition. The air is supplied to the inside of the unit 1410.

The deodorizing device 1700 is installed at one side of the extinguishing device 1400 and receives the malodorous gas generated inside the extinguishing device 1400. The deodorizer 1700 removes the malodorous gas supplied. Malodorous gases generated from sludge include ammonia (NH 3), hydrogen sulfide (H 2 S), methyl mercaptan (CH 3 SH), methyl sulfide ((CH 3) S), methylamine (CH 3 NH 2), trimethylamine ((CH 3) 3 N), Acetaldehyde (CH3CHO), styrene (C8H8), and the like. These malodorous gases may each be present or react with each other to produce a complex malodor. Therefore, the deodorizing device 1700 can be said to be a very important device to remove such odorous gas and to preserve the ecosystem more cleanly and improve the quality of life of human beings.

The deodorizer 1700 includes an electric deodorizer 1710, a washing deodorizer 1720, a flow passage unit 1730, a control unit 1740, and a valve unit 1750.

Referring to FIG. 2, the deodorizer 1710 decomposes the malodorous gas generated inside the vanishing device 1400 using electricity. To this end, the deodorizer 1710 includes a water tank unit 1711, an electrode unit 1712, and a gas supply unit 1713.

In the water tank unit 1711, odorous gas is introduced into the water, and water is filled therein. The electrode unit 1712 is installed inside the water tank unit 1711 and receives power from the outside to allow electricity to pass through the water filled in the water tank unit 1711. The gas supply unit 1713 is installed inside the water tank unit 1711, receives the malodorous gas from the extinguishing device 1400, and discharges it into the water tank unit 1711. The malodorous gas discharged into the tank unit 1711 is electrolyzed as water in the tank unit 1711 is energized by the electrode unit 1712.

The electrode unit 1712 may include a pair of electrodes 1714 and a pair of casings 1715. The pair of electrodes 1714 represent positive and negative charges, respectively, and are arranged to be spaced apart from each other, but are accommodated in the water tank unit 1711 so as to be parallel to each other. The pair of casing 1715 is a hollow cylindrical shape, and the pair of electrodes 1714 are each accommodated therein. The pair of casings 1715 are provided with grooves 1715a on the surfaces of the paired casings 1715. The water disposed in the water tank unit 1711 is introduced into the casing 1715 through the groove 1715a to be in contact with the electrode 1714 and to receive electricity only through the groove 1715a. do.

In this case, the electrode 1714 may be disposed such that its outer circumferential surface is in contact with the inner circumferential surface of the casing 1715. Therefore, water flowing into the casing 1715 through the groove 1715a does not penetrate between the electrode 1714 and the casing 1715, and the groove 1715a of the outer circumferential surface of the electrode 1714 is not penetrated. Will only touch parts exposed to the outside.

The groove 1715a may be formed along an up and down direction on an outer circumferential surface of the casing 1715. The gas supply unit 1713 is disposed to be perpendicular to the pair of casings 1715 at the lower side of the pair of casings 1715, and the odor supplied from the extinguishing device 1400 is provided on the upper side thereof. A discharge hole 1713a through which the gaseous gas is discharged upward may be formed.

In this case, the pair of malodorous gases discharged upward through the discharge hole 1713a flows along the formation direction of the pair of grooves 1715a formed in the pair of casings 1715, respectively. Can be decomposed by the electricity applied by the electrode 1714.

Referring back to FIG. 1, the washing deodorizer 1720 receives the malodorous gas generated in the decay device 1400 and removes the malodorous gas by dissolving it in a liquid. To this end, the washing deodorizer 1720 includes a first collecting part 1721, a second collecting part 1722, a first water spraying unit 1723, and a second water spraying unit 1724.

The first collecting unit 1721 receives a malodorous gas from the extinguishing device 1400. The first water spray unit 1723 sprays water into the first collecting unit 1721. The odorous gas introduced into the first collecting unit 1721 is dissolved in the water injected into the first collecting unit 1721, and the water containing the odorous gas is dissolved in the first collecting unit 1721. Fall to the bottom side of the will be discharged to the outside.

The second collecting unit 1722 is installed at one side of the first collecting unit 1721 and receives the gas passing through the first collecting unit 1721. The second water spray unit 1724 sprays water into the second collecting unit 1722. As such, the malodorous gas generated from the quenching device 1400 is dissolved in water in multiple stages through the first collecting unit 1721 and the second collecting unit 1722, thereby effectively removing the malodorous gas. can do.

The flow passage part 1730 is disposed between the dissipation device 1400, the electric deodorizer 1710, and the washing deodorizer 1720, and the malodorous gas discharged from the decomposing unit 1410 is disposed. The deodorizer 1710 and the washing deodorizer 1720 are supplied. In more detail, the flow pipe unit 1730 may include a first pipe line 1731, a second pipe line 1732, a third pipe line 1733, and a fourth pipe line 1734.

One end of the first conduit 1731 is connected to the disassembling unit 1410. The second conduit 1732 has one end connected to the other end of the first conduit 1731 and the other end connected to the electric deodorizer 1710. The third conduit 1733 has one end connected to a point where the first conduit 1731 and the second conduit 1732 are connected to each other, and the other end is connected to the washing deodorizer 1720. The fourth conduit 1734 has one end connected to the electric deodorizer 1710 and the other end connected to the third conduit 1733.

The malodorous gas generated from the decomposition unit 1410 flows along the first conduit 1731 to the second conduit 1732 and the third conduit 1733. The malodorous gas flowing into the second conduit 1732 is supplied to the gas supply unit 1713, and the malodorous gas passing through the gas supply unit 1713 is the third conduit through the fourth conduit 1734. Flow (1733). The malodorous gas flowing through the first conduit 1731 to the third conduit 1733 is supplied to the first collecting part 1721, and in turn, is discharged to the outside via the second collecting part 1722. do.

In this case, a separate opening and closing part (not shown) may be installed in the fourth conduit 1734 to selectively close the fourth conduit 1734. Accordingly, the opening and closing part closes the fourth conduit 1734 so that the malodorous gas supplied to the gas supply part 1713 through the second conduit 1732 does not flow into the fourth conduit 1734. All through the discharge hole (1713a) of the gas supply unit 1713 can be discharged to the interior of the water tank (1711). In addition, the opening and closing portion, by closing the fourth conduit 1734, the odorous gas supplied to the first collecting unit 1721 through the first conduit 1731 and the third conduit 1733 is It is possible to prevent backflow to the gas supply unit 1713 through the fourth conduit 1734.

The valve unit 1750 is disposed at a point at which the first conduit 1731, the second conduit 1732, and the third conduit 1733 are connected to each other. The valve unit 1750 flows to the second conduit 1732 and the third conduit 1733 through the first conduit 1731 based on a control signal received from the control unit 1740. Control the flow path of malodorous gas.

The valve unit 1750 may be provided as a single three-way valve and installed at a connection point of the first conduit 1731, the second conduit 1732, and the third conduit 1733, or two or more simple parts. It may be provided at the inlet of the second conduit (1732) and the inlet of the third conduit (1733) connected to the first conduit (1731) is provided as an opening valve and connected to the first conduit (1731). Will be said.

The controller 1740 receives a measurement value regarding the concentration of the malodorous gas inside the decomposition unit 1410 measured by the sensor unit 1430. In addition, the controller 1740 controls the valve unit 1750 based on the received measured value to the electric deodorizer 1710 and the washing deodorizer 1720 through the flow passage 1730. Selectively adjust the amount of malodorous gas supplied.

More specifically, the control unit 1740 may be set in advance a first reference value for the concentration of malodorous gas and a second reference value larger than the first reference value. When the measured value of the sensor unit 1430 is less than the first reference value, the controller 1740 closes the second conduit 1732 and flows the malodorous gas flowing into the first conduit 1731. When the measured value of the sensor unit 1430 is greater than or equal to the first reference value and is less than the second reference value, the third pipe 1733 is closed to supply the third pipe 1733. When the malodorous gas flowing in the air is supplied to the second conduit 1732 and the measured value of the sensor unit 1430 is greater than or equal to the second reference value, the second conduit 1732 and the third conduit 1733. The valve unit 1750 may be controlled to supply all of the malodorous gas flowing in the first conduit 1731 to the second conduit 1732 and the third conduit 1733.

In this case, the washing deodorizer 1720 operates in sequence, the electric deodorizer 1710 operates, and the washing deodorizer 1720 according to the concentration of the malodorous gas present in the decomposition part 1410. By operating both the deodorizer 1710 and the deodorizer 1710, it is possible to reduce the waste of power that can be generated as both the deodorizer 1720 and the deodorizer 1710 is always operating, and thus The overall efficiency of the sewage sludge treatment facility 1000 according to the present invention can be improved.

1000: sewage sludge treatment facility 1100: decanter
1200: Hopper 1300: Pump
1400: extinguishing device 1500: driving device
1600: air supply device 1700: deodorizer

Claims (8)

In the facility for treating sewage sludge,
A decanter for dewatering the supplied sewage sludge;
A hopper in which sewage sludge discharged from the decanter is stored;
The sewage sludge stored in the hopper is introduced into the inside and decomposed to decompose the sewage sludge existing inside through a composting process, and the agitator installed inside the decomposing part to stir the sewage sludge introduced into the decomposing part An extinction device comprising;
A driving device installed at one side of the dissipation device to drive the stirring unit;
An air supply device for supplying air into the vanishing device; And
An electric deodorizer installed on one side of the decay device and decomposing malodorous gas generated in the decay device using electricity, and an odor generated in the decay device and installed on one side of the deodorizer; A sewage sludge treatment facility comprising a deodorizer including a deodorizer for dissolving and removing a gaseous liquid in a liquid. The method according to claim 1,
The deodorizer is,
Water tank unit in which malodorous gas is introduced into the inside and water is filled therein,
An electrode unit installed inside the tank unit and receiving power from the outside to allow electricity to be filled into the water filled in the tank unit;
Sewage sludge treatment facility is installed in the tank portion and includes a gas supply for discharging the malodorous gas supplied from the extinction device to the tank. The method according to claim 2,
The electrode unit,
A pair of electrodes arranged to be spaced apart from each other,
And a pair of casings each of which receives the pair of electrodes therein and has grooves formed on surfaces of the side facing each other. The method according to claim 3,
The groove is formed along the vertical direction on the outer peripheral surface of the casing,
The gas supply unit, the sewage sludge treatment facility is disposed so as to be perpendicular to each of the pair of casing at the lower side of the pair of casing, the discharge hole through which the odorous gas supplied from the quenching device is discharged on the upper side. The method according to claim 1,
The washing deodorizer,
A first collecting part receiving the malodorous gas from the extinction device;
A first water spray unit spraying water into the first collecting unit;
A second collecting part installed at one side of the first collecting part and receiving gas passing through the first collecting part;
Sewage sludge treatment facility comprising a second water injection unit for injecting water into the second collecting unit. The method according to claim 1,
The extinction device,
Further comprising a sensor unit for measuring the concentration of odorous gas present in the decomposition unit,
The deodorizing device,
A flow passage part for supplying the malodorous gas discharged from the decomposition part to the electric deodorizer and the washing deodorizer;
And a control unit for selectively adjusting the amount of malodorous gas supplied to the electric deodorizer and the washing deodorizer through the flow passage part based on the measured value received from the sensor unit. The method according to claim 6,
The flow passage portion,
A first conduit connected to the disintegrating unit;
A second pipe connected to the first pipe and the deodorizer;
One end is connected to the point where the first pipe and the second pipe is connected to each other and the other end includes a third pipe connected to the washing deodorizer,
The deodorizing device,
The first duct, the second duct and the third duct is disposed at the point connected, the control signal from the control unit receives the flow of odorous gas flowing from the first duct to the second duct and the third duct Sewage sludge treatment facility further comprising a valve for controlling the path. The method according to claim 7,
The control unit,
When the measured value of the sensor unit is less than the first predetermined reference value, the second pipe is closed to supply the malodorous gas flowing into the first pipe to the third pipe,
When the measured value of the sensor unit is greater than or equal to a first preset reference value and less than a second preset reference value, the third duct is closed to supply odorous gas flowing into the first duct to the second duct,
When the measured value of the sensor unit is equal to or greater than a preset second reference value, both the second pipe and the third pipe are opened to supply malodorous gas flowing into the first pipe to the second pipe and the third pipe. Sewage sludge treatment facility that controls the valve part.

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