KR20020081007A - High pressure dehydrator with improved dehydration efficiency - Google Patents

Abstract

PURPOSE: A dehydrator is provided which increases dehydrating efficiency by improving first and second dehydrating parts in a dehydrating part of the dehydrator removing water of sludge in stages. CONSTITUTION: The high pressure dehydrator having increased dehydrating efficiency comprises a microwave generating unit(10) for breaking particles of sludge and heat the sludge at the same time by irradiating microwave on the outer circumferential surface of a main roller(11) of a first dehydrating part(2) that is rubber coated; a vacuum suction unit(20) for promptly separating water dehydrated and heated by the microwave generating unit(10) from the sludge; and vacuum suction pipes(36,37) in which diameter of pressing rollers(32) installed on the outer circumferential surface of a drum roller(31) of a second dehydrating part is gradually getting smaller as it goes to a rotational direction of the drum roller(31), and which suck and remove water that is separated from the sludge and leaked out from a gap between rubber belts(34,35) positioned at inner and outer parts of the dehydrator.

Description

High pressure dehydrator with improved dewatering efficiency {omitted}

The present invention relates to a dehydrator for dewatering sludge contained in wastewater generated in a sewage treatment plant or industrial site, and improving dewatering efficiency by improving a second dewatering part and a second dehydrating part of a dehydrating part of a dehydrator which removes water of sludge step by step. It is about the dehydrator which raised it.

In general, when removing the water contained in the sludge generated from sewage treatment plants and industrial wastewater, the dehydrator is used to dehydrate the water from the sludge.

The sludge fed to the dehydrator participates in a dehydrating aid (polymer coagulant) in the mixer, and then the sludge is supplied and transported uniformly on the filter cloth by the chute, and the water in the sludge placed on the filter cloth is moved by gravity. The area where sludge is removed from the filter cloth as described above is called a gravity dehydration part.

Sludge which is naturally removed from the water by gravity in the state loaded on the filter cloth as described above, the filter cloth is secondly removed by heat and pressure while passing through the heating roller and the pressure roller of the first dewatering part, and the water in the first dewatering part The sludge conveyed by the filter cloth after this secondary removal is dewatered by passing the drum roller of the 2nd dehydration part and the pressure rollers arrange | positioned along the outer peripheral surface of this drum roller.

As described above, the conventional high pressure dehydrator for removing water in the sludge firstly evaporates and heats the water by the heat of the heating roller when the sludge-loaded filter cloth passes through the heating roller of the first dehydration part, and at the same time only by the pressing pressure of the pressure rollers. It has the disadvantage of removing water, so that the water removal efficiency is not high; Second, since the surface of the heating roller is gradually heated, not only has the disadvantage of increasing the amount of electrical energy due to heating, but also easily causes corrosion, and heat is transferred directly to the filter cloth made of polypropylene, thereby curing the filter cloth. Phenomena have shortcomings such as shortening of life span and lengthening phenomenon; Thirdly, the operating load of the second dewatering part is increased, and the water content of the dewatering sludge is high; Fourth, due to the existing dehydration method, the internal moisture of the sludge dehydration can not be effectively removed, so the water content of the final dewatered sludge is high. And only one third of the drum roller is dehydrated by one tensioning device, which requires excessive force on the tensioning device, which causes the cylinder's lifespan and roller eccentricity. Low compressive effect and inefficient distribution of pressure, making it difficult to dehydrate water completely; Sixth, there was a problem of generating secondary soil pollution and water pollution due to the energy waste and land erosion and the generation of leachate due to incineration or landfill sludge containing water.

In order to solve the problems of the conventional dehydrator as described above, the present invention, by irradiating microwaves to the outer circumferential surface of the main roller of the rubber-coated first dewatering unit to install the microwave generator for heating the sludge while destroying the particles of the sludge And a vacuum suction device for quickly separating the dehydrated and heated water from the sludge by the microwave generator, and the tension rollers are installed on both outer circumferential surfaces of the drum roller of the second dewatering part, and at the same time, the diameter of the gaal rollers is drummed. It consists of a vacuum suction tube that adopts a small one while going in the rotational direction of the roller and separates the sludge from the sludge and sucks out the water flowing between the gaps of the rubber belt, and the internal aqueous moisture (sludge) due to the destruction of the sludge in the first dehydration part. Dehydration efficiency by dehydrating the water hiding inside) In addition to reducing the operating load of the second dewatering unit, it is possible to reduce the operating cost according to the operation of the dehydrator, and the method of heating only the particles of the sludge not only prevents the phenomenon that the filter cloth is hardened, but also prevents sagging. High pressure dehydrator which can remove water from sludge pressurized by drum roller of second dewatering part and sludge pressurized by both tensioning device and press roller by vacuum suction tube The purpose is to provide.

1 is a block diagram of a high pressure dehydrator to increase the dehydration efficiency according to the present invention.

Figure 2 is a partial perspective view of the first dewatering portion of the high pressure dehydrator according to the present invention.

Figure 3 is an exemplary view showing a state in which the rubber belt is installed on the tension roller of the second dewatering portion of the high-pressure dehydrator according to the present invention.

※ Explanation of symbols used in the main part of the drawing ※

2: first dewatering unit 10: microwave generator

11: main roller 12: prevention wall

13: frame 14: microwave generator

4: second dewatering unit 20: vacuum suction device

21: suction hole 22: hose

31: drum roller 32: pressure roller

33: idle roller 34,35: tension roller

43a, 35a: Rubber belt 36,37: Vacuum suction pipe

38: pressurized cylinder T: gap

The construction of the present invention for achieving the above object is separated from household sewage and industrial wastewater, the dehydrating aid (polymer coagulant) is supplied in the mixer and supplied to the chute, the sludge is supplied uniformly spread over the filter cloth by the chute The water is first removed from the gravity portion, and the sludge naturally removed from the gravity portion of the gravity is removed by the first dehydration portion composed of the main roller and the pressure roller, and then passes through the second dehydration portion. Drum rollers and pressure rollers are used to remove moisture three times.

The first dewatering part 2 is composed of a microwave generator 10 and a vacuum suction device 20.

The microwave generator 10, the outer circumferential surface of the main roller 11 is coated with a rubber, and the outer circumferential surface of the main roller 11 can be formed in an arc shape that can surround the main roller 11 and at the same time can prevent the microwaves from being emitted to both sides. Frame 13, which is a synthetic resin material having a barrier wall 12, is provided, and inside the frame 13 is irradiated with microwaves generated by the microwave oscillation unit to finely destroy the particles of the sludge, as well as by friction by vibration A plurality of microwave generators 14 for generating heat in the sludge is distributed at equal intervals along the longitudinal direction of the main roller (11).

The internal aqueous moisture (water hidden in the sludge), which is separated from the sludge in which the particles are finely broken in the microwave generator 10, is removed by the vacuum suction device 20, and the vacuum suction device 20 generates microwaves. Hollow, connected to the vacuum pump and the hose 22 to suck up the water-resistant water separated from the sludge that particles are destroyed while passing the part 10, the vacuum pump on the surface corresponding to the main roller 11 A plurality of water suction holes 21 are formed so that the water separated from the sludge can be sucked out by the suction operation of the sludge.

The water of the sludge from which the secondary water is removed from the first dewatering unit 2 including the microwave generator 10 and the vacuum suction device 20 is removed from the second dewatering unit 4 in the third manner.

The second dewatering part 4 is installed on the outer circumferential surface of the drum roller 31 with pressure rollers 33 that are in close contact with the drum rollers at equal intervals in three directions. 32 has a small diameter while going in the rotational direction of the drum roller 31 and the idle roller 33 is provided between the pressure roller 32, the drum roller 32 and the idle roller 33 in the drum roller 33 The rubber rollers 34a and 35a of several strands are arranged in the tension rollers 34 and 35 installed at a distance from both sides of the rollers 31 at a predetermined interval so that the pressure roller 32 and the idle roller 33 It is installed to be zigzag-wound between the vacuum suction pipe between the pressure roller 32 and the idle roller 33, which can separate the water from the sludge by the pressing force and suck out the water flowing out between the gaps of the rubber belts 34a and 35a. (36) 37 is provided.

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

1 is a block diagram of a high-pressure dehydrator with a high dehydration efficiency according to the present invention, Figure 2 is a partial perspective view of the first dewatering portion of the high-pressure dehydrator according to the present invention, Figure 3 is a second perspective view of the high-pressure dehydrator according to the present invention The dehydration part is an exemplary view showing a state in which the rubber belt is installed on the tension roller.

As shown, the sludge separated from the wastewater in the high-pressure dehydrator 1 of the present invention is carried on the filter cloth through the chute.

As described above, the sludge carried on the filter cloth is separated and dehydrated from the sludge in the gravity unit.

The sludge dehydrated by the first gravity in the self-gravity part is dehydrated secondly through the first dehydration part 2, when the filter cloth carrying the sludge passes through the main roller 11 of the first dewatering part 2. Dehydration by the tension of the filter cloth is carried out and the sludge particles are destroyed by the microwave generator 10 installed on the outer circumferential surface of the main roller 11, so that the water (water) hidden in the sludge is rapidly dehydrated. .

The principle in which the sludge particles are destroyed by the microwave generator 10 will be described in more detail. The microwave generated by the microwave oscillator (not shown) is installed in the frame 13. Will be investigated.

As described above, the particles of the sludge are destroyed by the microwave wavelength irradiated through the microwave generator 14 to rapidly discharge the water from the sludge, and the microwaves penetrate into the sludge and convert the heat into the sludge to suck in the moisture hidden inside the sludge particles. At the same time it will be able to dehydrate.

The microwave to be irradiated is that the outer surface of the main roller 11 is coated with rubber can be used safely without electrical consumption.

The water separated from the sludge by the microwave generator 10 is the suction hole 21 formed on the surface corresponding to the main roller 11 when passing through the co-suction device 20 connected to the vacuum pump and the hose 22 It is sucked through them and separated (dehydrated).

As described above, the sludge from which the water is secondarily removed from the first dewatering part 10 is dehydrated while passing through the second dewatering part 4.

When the sludge passes through the second dewatering part 4, the drum roller 31 is pressed by the pressure roller 32 installed by the pressure cylinder 38 so as to be pressed against the outer circumferential surface of the drum roller 31. Residual moisture when passing through the rubber belts 34a and 35a, which are wound on the tension rollers 34 and 35 on both sides of the drum roller 31 and the pressure rollers 32, and zigzagly installed over the idle rollers 33. Is removed.

When the sludge is pressurized by the pressure roller 32, the diameter (diameter) of the pressure roller 32 decreases little by little toward the discharge port, so that the pressure difference between the surface of the pressure roller 32 and the distance between the pressure roller and the pressure roller are also reduced. As the pressure decreases toward the outlet, the pressure is gradually increased while preventing the sludge from escaping between the filter cloths due to the sudden pressure difference, and at the same time, the pressure is increased as the inlet pressure of the sludge goes to the outlet, thereby effectively removing water.

In addition, the water separated from the second dewatering part 4 as described above is released into the gap T of the rubber belts 34a and 35a installed in multiple strands, as shown in FIG. The suction pipe 36 is prevented to be sucked back into the sludge again.

As described above, the high-pressure dehydrator having high dehydration efficiency of the present invention is irradiated from the microwave generator 10 by escaping the water dehydration of the sludge dewatered from the first dewatering unit 2 by the electro-osmotic heating method as in the prior art. The sludge is finely crushed by the microwave to rapidly discharge the water contained in the sludge to the outside, and heat only the sludge, and suction and remove the water separated from the sludge by the vacuum suction device 20. It is possible to reduce the operating load of the second dewatering section 4 while increasing the dewatering efficiency at the section 2; Second, as the sludge is heated, not only the curing phenomenon of the filter cloth due to heat generated in the conventional heating roller method can be prevented, but also the slowness of the filter cloth due to the expansion and contraction due to the temperature change is eliminated; Third, the rubber belt 34a on which the rubber belt 34a is wound on the tension roller 34 is provided on one side of the drum roller 31 forming the second dewatering part 4, and the other of the drum roller 31 is provided. On the side, the rubber belt 35a, which is wound zigzag with respect to the pressure rollers 33 having a small diameter, is installed by the tension roller 35 while going from the side from which the sludge is supplied, to the water separated from the sludge. It includes a vacuum suction tube 36 that can remove the suction, as the time for which the sludge is pressurized is increased, as well as the dewatering efficiency is increased, as well as the water is removed from the sludge to remove the water coming out between the rubber belt to the sludge. It is a very useful invention that can prevent reinfiltration.

Claims (1)

Separated from domestic sewage and industrial wastewater, dehydration aid (polymer coagulant) enters the mixer and is supplied to the chute so that the sludge is uniformly spread over the filter cloth by the chute, and water is first removed from the self-gravity part. The sludge from which moisture is first removed from the gravity part is secondly removed by the first dehydration part consisting of heating rollers which are removed by the pressing force, and then, by the drum roller and the pressure roller while passing through the second dehydration part. In the dehydration device to remove the water three times, The outer circumferential surface of the main roller 11 constituting the first dewatering part 2 of the dehydrator 1 is coated with rubber, and the microwaves are formed on both sides at the same time as the outer circumference of the main roller 11. Frame 13, which is a synthetic resin material having a prevention wall 12 that can be prevented from being discharged, is installed inside the frame 13 by irradiating microwaves generated from the microwave oscillation unit to destroy the particles of the sludge, as well as A microwave generator 10 having a plurality of microwave generators 14 generating heat to the sludge by friction by vibration at equal intervals along the longitudinal direction of the main roller 11; Through the microwave generating unit 10 is hollow so as to suck up the water separated from the sludge is small, is connected to the vacuum pump and the hose 22, the surface corresponding to the main roller 11 A vacuum suction device (20) in which a plurality of water suction holes (21) are formed so that the water separated from the sludge can be sucked out by the suction operation of the vacuum pump; The second dewatering part 4 which thirdly removes the water of the sludge from which the second water is removed from the first dewatering part 2 is closely attached to the drum roller by the pressure cylinder 38 on the outer circumferential surface of the drum roller 31. The pressure roller 33 is installed at equal intervals in three directions, but the pressure roller 32 becomes smaller in diameter as the drum roller 31 rotates, that is, from the inlet to the outlet, and the interval becomes narrower. At the same time, the idle roller 33 is provided between the pressure rollers 32, and the tension rollers 34 and the pressure rollers 32 and the idle rollers 33 are provided at a distance from both sides of the drum roller 31. A plurality of rubber belts (34a) (35a) are arranged in a gap (T) at a predetermined interval on the 35 and is installed to be zigzag wound between the pressure roller 32 and the idle roller 33, the pressure roller (32) ) And the idle roller 33 is separated from the sludge by the pressing force rubber bell (34a) (35a) of water can be sucked vacuum suction pipe (36) (37) exiting through openings are provided the high-pressure dehydrator with improved dewatering efficiency characterized in that.