KR20000041282A - Methof for dewatering of sludge - Google Patents

Methof for dewatering of sludge Download PDF

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Publication number
KR20000041282A
KR20000041282A KR1019980057120A KR19980057120A KR20000041282A KR 20000041282 A KR20000041282 A KR 20000041282A KR 1019980057120 A KR1019980057120 A KR 1019980057120A KR 19980057120 A KR19980057120 A KR 19980057120A KR 20000041282 A KR20000041282 A KR 20000041282A
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KR
South Korea
Prior art keywords
sludge
belt
pressure roller
high pressure
dewatering
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KR1019980057120A
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Korean (ko)
Inventor
김재신
이종렬
Original Assignee
이구택
포항종합제철 주식회사
신현준
재단법인 포항산업과학연구원
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Priority to KR1019980057120A priority Critical patent/KR20000041282A/en
Publication of KR20000041282A publication Critical patent/KR20000041282A/en

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
    • B01D33/042—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering whereby the filtration and squeezing-out take place between at least two filtering bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/62—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying
    • B01D33/64—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression
    • B01D33/646—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression by pressure rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/28—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rollers or discs with material passing over or between them, e.g. suction drum, sieve, the axis of rotation being in fixed position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/20—Rollers
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/06—Pressure conditions
    • C02F2301/063—Underpressure, vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

PURPOSE: A method for dewatering sludge is provided, which is characterized in that press rollers and belt press are installed so that water in the sludge is removed efficiently. CONSTITUTION: A sludge is dewatered by press rollers(30,40) and the water is dropped by gravitation. But the water near the belt press is returned to the inside of the sludge. So, inside of the press roller(30) is in vacuum condition to removed remained water. Sludge is passed through the space between the upper belt(10a) and the lower belt(10b), and transferred to the press roller(30) in vacuum condition. The proper pressure is 200 - 600 mmHg. The surface of the roller is composed of a specific material, which has absorptive property because the water is removed easily by capillary tube phenomenon. Sponge or cotton material is appropriate.

Description

고효율 슬러지 탈수방법High efficiency sludge dewatering method

본 발명은 고압 벨트탈수기로 슬러지를 탈수하는 방법에 관한 것으로, 상세하게는 벨트탈수기의 고압로울러의 내부로 수분을 흡입하여 탈수효율을 증가시키는 방법에 관한 것이다.The present invention relates to a method for dewatering sludge with a high pressure belt dehydrator, and more particularly, to a method for increasing water dehydration efficiency by sucking moisture into a high pressure roller of a belt dehydrator.

폐수처리공정 또는 제철산업 등에서는 각종 슬러지가 발생하고 있으며, 이 슬러지는 탈수과정을 거쳐 슬러지에 함유된 수분을 제거하여 무게와 부피를 감소시킨 다음 매립하거나 재활용하고 있다. 이에 따라, 슬러지의 이송비용이 적게 들고 취급하기가 용이하며, 매립을 위해 소각하는 경우 발열량이 증가되고 매립시 침출수의 발생을 미리 방지할 수 있는 장점이 있다. 그러므로, 슬러지를 효과적으로 탈수시키는 공정은 슬러지처리에 있어 매우 중요한 부분이라 할 수 있다.Various sludges are generated in the wastewater treatment process or the steel industry, and the sludge is dehydrated to remove moisture contained in the sludge, to reduce weight and volume, and to be landfilled or recycled. Accordingly, the transport cost of the sludge is low and easy to handle, and when incinerated for landfill, the calorific value is increased and there is an advantage of preventing the generation of leachate during landfill. Therefore, the process of effectively dewatering the sludge is a very important part of the sludge treatment.

일반적으로 수처리의 침전조에서 발생되는 슬러지는 농축조를 통과시키면서 조금 더 농축시킨 다음, 전처리반응조에서 농축슬러지의 성상을 개량하는데, 이 과정에서는 응집제를 이용하여 슬러지를 이루고 있는 고형물질간의 결합을 크게 하여 플록을 형성시키고 이 플럭을 탈수기로 이송하여 더 많은 수분을 배출시켜 슬러지의 함수율을 낮춘 다음에 케이크를 탈수기로부터 탈리시킨다.In general, the sludge from the sedimentation tank of the water treatment is concentrated a little more as it passes through the concentration tank, and then improves the properties of the concentrated sludge in the pretreatment reaction tank. In this process, flocculant is used to increase the binding between the solid materials forming the sludge. And the floc is transferred to a dehydrator to release more moisture to lower the water content of the sludge and then to desorb the cake from the dehydrator.

기계적인 탈수기는 벨트프레스(Belt Press), 가압탈수기(Filter Press), 진공탈수기(Vacuum Fillter), 원심분리기(Centrifuge) 등이 대표적이다. 고분자 응집제의 생산기술의 발달 및 장치의 편리성 등에 의해 벨트프레스의 사용이 증가하고 있으나, 실제적으로 슬러지에 적용되는 압력의 크기가 그리 높지 않아 다른 탈수기에 비해 슬러지 케이크 함수율이 낮은 단점이 있다.Mechanical dehydrators include belt presses, filter presses, vacuum fillers, centrifuges, and the like. The use of belt presses is increasing due to the development of the production technology of polymer coagulants and the convenience of the device, but the sludge cake moisture content is lower than that of other dehydrators because the pressure applied to the sludge is not so high.

이러한 단점을 보완하기 위하여 최근에는 도 1에 도시된 고압 벨트프레스가 개발되어 상업화되고 있다. 고압 벨트탈수기에서는, 상부벨트(여과포)(10a)와 하부벨트(여과포)(10b)가 면접하는 사이로 슬러지를 연속적으로 공급하면, 이 양벨트(10)가 다수개의 압착롤(20)의 외면에 접하여 장력을 유지하면서 이송되는 중력탈수부와 양 벨트가 고압로울러(30)와 가압로울로(40) 사이에서 가압되면서 이송되는 고압탈수부를 통과하면서 슬러지가 탈수된다. 그러나, 이러한 고압 벨트탈수기를 이용하여 슬러지를 탈수하더라도 분리된 여과액(수분)이 여과포를 따라 흐르기 때문에 여과포는 항상 젖은 상태로 존재하게 되어 탈수효율이 그리 높지 않다. 특히, 고압탈수부에서 슬러지에 압력을 받는 영역이 가압로울러가 접촉하는 상하부벨트 부분에 제한되어 있어 계속적으로 압력을 받지 않게 되며, 이에 따라 슬러지가 로울러를 지나갈 때만 탈수가 이루어지지만 곧 압력이 풀리면서 탈수가 멈추게 된다. 이때 상하부벨트(여과포)를 빠져나가던 일부 여액이 다시 슬러지로 되돌아오면서 탈수효과가 떨어진다.Recently, a high pressure belt press shown in FIG. 1 has been developed and commercialized to compensate for these disadvantages. In the high-pressure belt dehydrator, when the sludge is continuously supplied between the upper belt (filtration cloth) 10a and the lower belt (filtration cloth) 10b, the both belts 10 are applied to the outer surfaces of the plurality of pressing rolls 20. The sludge is dewatered while the gravity dewatering unit and both belts are brought into contact with each other while maintaining the tension and the high-pressure dewatering unit is transferred while being pressed between the high pressure roller 30 and the pressure roller 40. However, even if the sludge is dewatered using such a high-pressure belt dehydrator, the separated filtrate (water) flows along the filter cloth so that the filter cloth is always in a wet state and the dewatering efficiency is not so high. In particular, the area under pressure of the sludge in the high pressure dewatering part is limited to the upper and lower belt parts contacted by the pressure roller, so that it is not continuously pressurized. Thus, the sludge dehydrates only when passing through the roller, but the pressure is released soon. Dehydration stops. At this time, some of the filtrate exiting the upper and lower belts (filtrate) is returned to the sludge again, the dehydration effect is reduced.

따라서, 본 발명은 고압탈수부에서 가압로울러에 의해 가압되어 슬러지에서 빠져나와 여과포에 남아 있는 여액을 고압로울러의 내부로 흡입하여 고효율로 탈수하는 방법을 제공하는데, 그 목적이 있다.Accordingly, the present invention is to provide a method for dewatering with high efficiency by suctioning the filtrate remaining in the filter cloth by the pressurized roller in the high-pressure dewatering portion and the sludge from the sludge.

도 1은 기존의 고압벨트탈수기의 일례도1 is an example of a conventional high pressure belt dehydrator

도 2는 본 발명의 탈수방법을 적용하기 위한 고압 벨트탈수기의 일례도Figure 2 is an example of a high pressure belt dehydrator for applying the dehydration method of the present invention

도 3은 본 발명의 모사실험에 이용된 탈수장치의 개략도Figure 3 is a schematic diagram of the dehydration apparatus used in the simulation of the present invention

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10.....상하부 벨트(여과포) 20.....압착로울러10 ..... Top and bottom belts (filters) 20 ....

30.....고압로울러 40.....가압로울러30 ..... High Pressure Roller 40 ..... Pressure Roller

상기 목적을 달성하기 위한 본 발명의 고효율 탈수방법은, 상부 벨트와 하부벨트가 면접하면서 다수개의 압착로울러의 외면에 접하여 장력을 유지하면서 이송되는 중력탈수부;와 면접한 벨트가 고압로울러와 가압로울러 사이로 이송되는 고압탈수부;로 구성되는 고압 벨트탈수기로 탈수하는 방법에 있어서, 슬러지를 상기 상부벨트와 하부벨트 사이로 연속적으로 공급하여 중력탈수하면서 상기 고압로울러의 내부에 진공을 형성하여 슬러지의 수분을 고압로울러의 내부로 흡입하여 고압탈수하는 것을 포함하여 구성된다.High efficiency dewatering method of the present invention for achieving the above object, the upper belt and the lower belt while contacting the outer surface of the plurality of compression rollers while contacting the gravity dewatering portion to be transported while maintaining the tension; the belt interviewed with the high pressure roller and the pressure roller In the method of dewatering with a high-pressure belt dehydrator consisting of, the high-pressure dewatering unit to be transported between, the sludge is continuously supplied between the upper belt and the lower belt while gravity dewatering to form a vacuum in the interior of the high-pressure roller to maintain moisture It is configured to inhale into the interior of the high-pressure roller to depressurize.

이하, 본 발명을 도 2를 통해 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to FIG. 2.

위에서 언급한 바와 같이, 기존의 고압탈수기를 이용한 탈수방법은 고압로울러(30)와 가압로울러(40)에 의해 슬러지가 압착되면서 내부의 수분이 빠져 나오기 시작하면서 탈수가 된다. 이때 충분히 빠져 나오는 수분은 중력에 의해 아래로 떨어져 제거 되지만, 슬러지의 압착이 풀리면서 여과포(벨트)의 근처에 있는 수분은 다시 슬러지 내부로 들어가게 된다. 그러므로 가압시 여과포 근처에 도달해 있는 수분을 진공으로 제거한다면 탈수의 효과를 극대화시킬 수 있게 된다.As mentioned above, the dehydration method using a conventional high pressure dehydrator is dewatered while the sludge is compressed by the high pressure roller 30 and the pressure roller 40 and the moisture inside starts to escape. At this time, the water coming out sufficiently is removed by gravity to fall down, but as the sludge is released, the water near the filter cloth (belt) enters into the sludge again. Therefore, if the water that reaches near the filter cloth during the pressurized vacuum is removed, the effect of dehydration can be maximized.

따라서, 본 발명은 고압 벨트탈수기의 고압로울러(30)의 내부에 진공을 형성하여 가압로울러(40)에 의해 슬러지로 부터 빠져나와 여과포에 남아 있는 여액을 고압로울러의 내부로 흡입하는데, 그 특징이 있다.Therefore, the present invention forms a vacuum inside the high pressure roller 30 of the high pressure belt dehydrator and sucks the filtrate remaining in the filter cloth from the sludge by the pressure roller 40 to the inside of the high pressure roller. have.

이러한 본 발명은 먼저, 슬러지를 상부벨트(10a, 여과포)와 하부벨트(10b, 여과포 ) 사이로 연속적으로 공급하여 통상의 방법대로 중력탈수부에서 중력탈수하고, 이어 고압로울러(30)와 가압로울러(40) 사이로 양벨트를 통과시키면서 고압로울러(30)의 내부에 진공을 형성하여 여과포에 남아있는 여액(수분)을 고압로울러의 내부로 흡입하여 탈수한다. 이때의 진공은 진공도가 높을수록 탈수효율이 좋아지며, 탈수효율과 경제성을 고려할 때 최적의 진공도는 200∼600mmHg로 형성하는 것이 바람직하다.In the present invention, first, the sludge is continuously supplied between the upper belt (10a, filter cloth) and the lower belt (10b, filter cloth) by gravity dehydration in the gravity dewatering unit in the usual manner, and then the high pressure roller (30) and the pressure roller ( 40) while passing through both belts to form a vacuum in the interior of the high-pressure roller 30 to suck the filtrate (water) remaining in the filter cloth into the interior of the high-pressure roller to dehydrate. At this time, the higher the degree of vacuum, the better the dehydration efficiency, and considering the dehydration efficiency and economic efficiency, it is preferable to form an optimal vacuum level of 200 to 600 mmHg.

또한, 고압로울러의 외면에는 흡수성재질(32)을 부착하는 것이 좋은데, 이는 모세관현상에 의해 여과포 주위의 수분이 쉽게 빨려 들어가서 탈수효율이 좋아지기 때문이다. 흡수성재질로는 스폰지 또는 면제품의 천등을 예로 들 수 있다. 대부분의 여과포가 폴리프로필렌계의 재질로 되어 있어서 수분과의 친화력이 낮은 반면, 흡수성재질은 수분과의 친화력이 높아 효과적으로 수분을 흡수할 수 있다.In addition, it is preferable to attach the absorbent material 32 to the outer surface of the high pressure roller, because the water around the filter cloth is easily sucked by the capillary phenomenon, so that the dewatering efficiency is improved. The absorbent material may be, for example, a sponge or cotton cloth. Most of the filter cloth is made of a polypropylene-based material has a low affinity with water, while the absorbent material has a high affinity with water and can effectively absorb water.

이러한 본 발명의 탈수방법은 기존의 벨트 탈수기에도 적용이 가능하겠지만 바람직하게는 고압 벨트탈수기에 적용하는 것이다. 이는 벨트탈수기의 압착로울러는 직경이 작아 진공을 형성하기에는 공간이 부족하기 때문이다.The dehydration method of the present invention can be applied to a conventional belt dehydrator, but is preferably applied to a high pressure belt dehydrator. This is because the compression roller of the belt dehydrator has a small diameter and insufficient space to form a vacuum.

이러한 본 발명의 고효율탈수방법은, 도 2에 나타난 바와 같이 고압 벨트탈수기의 고압로울러의 내부에 진공을 형성하는 진공펌프와 고압로울러로 흡수된 수분을 배출하는 배출부를 형성된 고압벨트 탈수기를 이용하여 슬러지를 탈수할 수 있다.The high efficiency dewatering method of the present invention, as shown in Figure 2, using a high-pressure belt dehydrator formed of a vacuum pump to form a vacuum inside the high-pressure roller of the high-pressure belt dehydrator and a discharge portion for discharging the water absorbed by the high pressure roller Can dehydrate.

이하, 본 발명을 실시예를 통하여 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail with reference to Examples.

[실시예]EXAMPLE

(종래예)(Conventional example)

함수율이 97.5%로 농축된 슬러지를 일반 벨트프레스에 적용되는 압력(3-4 기압)과 고압에 적용되는 압력(10기압)에서 탈수를 하고 그 결과를 아래 표 1에 나타내었다.The sludge with a water content of 97.5% was dehydrated at a pressure applied to a general belt press (3-4 atm) and a pressure applied at a high pressure (10 atm), and the results are shown in Table 1 below.

(발명예)(Invention example)

고압 벨트탈수기의 고압탈수부에 고압로울러에 진공을 형성하여 탈수하는 경우에 대한 탈수효율을 알아보기 위해 도 2와 같은 모사실험장치를 구성하여 탈수케이크의 함수율을 측정하였다. 여기서 사용된 슬러지는 상기 종래예에서 이용된 것과 동일한 것이다. 모사실험장치에는 고압로울러의 외면에 흡수력을 가진 재질(스폰지)을 부착한 경우와 부착하지 않은 경우에 대하여 탈수효과도 함께 알아보고 그 결과를 표 1에 나타내었다.In order to determine the dehydration efficiency for the case of dehydration by forming a vacuum in the high pressure roller in the high pressure dehydration part of the high pressure belt dehydrator, the water content of the dehydration cake was measured by configuring a simulation test apparatus as shown in FIG. The sludge used here is the same as that used in the conventional example. In the simulation apparatus, the dehydration effect was also examined with and without the absorbent material (sponge) attached to the outer surface of the high pressure roller, and the results are shown in Table 1.

번호number 탈수조건Dehydration Condition 탈수케이크 함수율Dehydrated Cake Water Content 기존 대비 부피감소율Volume reduction rate 1One (농축슬러지)(Concentrated sludge) 97.5%97.5% -- 22 일반 벨트탈수기( 3기압 5분)General belt dehydrator (3 standard atmosphere five minutes) 84.6%84.6% 0%(기존)0% (conventional) 33 고압 벨트탈수기: 3기압 5분 + 10기압 2분High pressure belt dehydrator: 3 atmospheres 5 minutes + 10 atmospheres 2 minutes 77.3%77.3% 32.2%32.2% 44 고압벨트 탈수기+진공(3기압 5분 + (10기압 2분+ 진공))High pressure belt dehydrator + vacuum (3 atm 5 min + (10 at 2 min + vacuum)) 200mmHg200mmHg 76.9%76.9% 33.3%33.3% 300mmHg300mmHg 76.5%76.5% 34.5%34.5% 400mmHg400mmHg 75.2%75.2% 37.9%37.9% 500mmHg500mmHg 74.8%74.8% 38.9%38.9% 600mmHg600mmHg 74.5%74.5% 39.6%39.6% 55 고압벨트탈수기+진공+흡수성재질(3기압 5분 + (10기압 2분 + 진공))High pressure belt dehydrator + vacuum + absorbent material (3 atm 5 min + (10 at 2 min + vacuum)) 200mmHg200mmHg 76.6%76.6% 34.2%34.2% 300mmHg300mmHg 76.1%76.1% 35.6%35.6% 400mmHg400mmHg 75.0%75.0% 38.4%38.4% 500mmHg500mmHg 74.5%74.5% 39.6%39.6% 600mmHg600mmHg 74.2%74.2% 40.3%40.3%

위의 표 1에서 알 수 있듯이, 본 발명에 따라 진공을 적용할 경우 400mmHg 이상에서는 슬러지 부피 감소율이 다소 크게 증가한 37.9% 이상을 나타내 고압만 적용할 때 보다 18% 이상의 개선효과를 나타내고 있고, 흡수성 재질을 적용했을 경우에는 진공도 400mmHg 이상에서 슬러지 부피 감소율이 38.4% 이상을 나타내 고압만 적용할 때보다 20% 이상의 개선효과를 나타내었다.As can be seen in Table 1, when the vacuum is applied according to the present invention, the sludge volume reduction rate is more than 37.9% increased slightly more than 400mmHg, showing an improvement effect of 18% or more than the high pressure only, and absorbent material When applied, the sludge volume reduction rate was more than 38.4% at the vacuum degree of 400mmHg or more, which showed an improvement effect of more than 20% compared with the application of high pressure alone.

상술한 바와 같이, 본 발명은 고압탈수부에서 가압로울러에 의해 가압되어 슬러지에서 빠져나와 여과포에 남아 있는 여액을 고압로울러의 내부에 진공을 형성하여 흡입함으로써 슬러지의 탈수율을 크게 개선하는 효과가 있다.As described above, the present invention has the effect of greatly improving the dewatering rate of the sludge by pressurized by the pressure roller in the high pressure dewatering unit to escape from the sludge to form a vacuum inside the high pressure roller to suck the filtrate remaining in the sludge. .

Claims (3)

상부 벨트와 하부벨트가 면접하면서 다수개의 압착로울러의 외면에 접하여 장력을 유지하면서 이송되는 중력탈수부;와 면접한 벨트가 고압로울러와 가압로울러 사이로 이송되는 고압탈수부;로 구성되는 고압 벨트탈수기로 탈수하는 방법에 있어서,Gravity dehydration unit which is transported while maintaining the tension in contact with the outer surface of the plurality of compression rollers while the upper belt and the lower belt are interviewed; and the high-pressure dewatering unit that the belt interviewed is transferred between the high pressure roller and the pressure roller; In the method of dehydration, 슬러지를 상기 상부벨트와 하부벨트 사이로 연속적으로 공급하여 중력탈수하면서 상기 고압로울러의 내부에 진공을 형성하여 슬러지의 수분을 고압로울러의 내부로 흡입하여 고압탈수하는 것을 포함하여 이루어짐을 특징으로 하는 슬러지의 고효율 탈수방법.Sludge is continuously supplied between the upper belt and the lower belt to form a vacuum in the interior of the high pressure roller while gravity dewatering and suctioning the water of the sludge into the interior of the high pressure roller, characterized in that the sludge of the sludge High efficiency dewatering method. 제 1항에 있어서, 상기 고압롤러의 내부 진공은 200∼600mmHg임을 특징으로 하는 방법.The method of claim 1, wherein the internal vacuum of the high pressure roller is characterized in that 200 ~ 600mmHg. 제 1항에 있어서, 상기 고압로울러의 외면에는 흡수성재질을 부착함을 특징으로 하는 탈수방법.The dewatering method of claim 1, wherein an absorbent material is attached to an outer surface of the high pressure roller.
KR1019980057120A 1998-12-22 1998-12-22 Methof for dewatering of sludge KR20000041282A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100345933B1 (en) * 1999-12-13 2002-07-24 남이희 Dehydrating apparatus for a separator of solid/liquid of stock excretions
KR100406191B1 (en) * 2001-06-21 2003-11-17 김용훈 Vacuum high pressure dehydrator with improved dewatering efficiency

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100345933B1 (en) * 1999-12-13 2002-07-24 남이희 Dehydrating apparatus for a separator of solid/liquid of stock excretions
KR100406191B1 (en) * 2001-06-21 2003-11-17 김용훈 Vacuum high pressure dehydrator with improved dewatering efficiency

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