KR101276389B1 - Low velocity centrifugal dehydrator - Google Patents

Abstract

PURPOSE: A low speed centrifugal dehydration apparatus is provided to be able to obtain a high efficiency at a low cost due to the integrated effect of compression dehydration in addition to the centrifuge. CONSTITUTION: A low speed centrifugal dehydration apparatus comprises a fixed frame (100); a first casing (200) which is installed within the fixed frame; a first drum screen (210) which is installed within the first casing in a rotatable manner; a first axis (120); a rotating cylinder (230) which is installed within the first drum screen and fixed to the penetrated first axis, and has a sludge outlet; multiple scrappers which scrap the inner periphery of the first drum screen; a second axis; a second casing (300) which is installed in parallel with the first casing; a second drum screen (310) which is fixed within the second casing; a fixture (500) in a spoke form; and a screw press (610) for feeding which is installed within the second drum screen in a rotatable manner. The first axis is a tube type so that the source water is supplied, penetrates into the first drum screen while rotated in connection with a driving source, and is fixed to the first drum screen as one body. The second axis rotates and supports the opposite end of the first axis of the rotating cylinder. A bearing structure in which the second axis is bonded to the fixture comprises a double bearing structure. A screw shaft which rotates the screw press for feeding is positioned on the same straight line of the second axis. The rotation of the screw shaft and the second axis is conducted by separate driving sources, and the rotating speed of the screw shaft is slower than the second axis. A third casing (400) is equipped on the opening of the second casing which is opposite to the first casing. A pressure control plate (620) elastically sealing the opening with a spring is installed in the third casing. [Reference numerals] (AA) Source water inlet; (BB) First processed water outlet; (CC) Second processed water outlet; (DD) Sludge outlet

Description

LOW VELOCITY CENTRIFUGAL DEHYDRATOR}

The present invention relates to a low speed centrifugal dehydration device, and more particularly, to a low speed centrifugal dewatering device that maximizes dewatering efficiency by enhancing a screw press function.

Generally, sewage discharged from a flush toilet, bath, kitchen, etc., manure or sludge collected from a toilet, or manure or livestock wastewater of livestock are first processed in sewage treatment facilities or septic tanks installed in each household or industry. It is treated in sewage treatment plant, wastewater treatment plant or wastewater treatment plant.

However, since the treated objects such as sewage, manure and sludge are mixed with a large amount of water and solids, the purification process may be properly performed without separating and removing the solids (hereinafter referred to as 'sludge'). Can't.

Therefore, the purification process includes a step of separating water and sludge through a dehydration process.

Such a sludge dewatering method includes a belt press method or a screw press method for separating water by directly pressing the sludge by a filter cloth or a screw passing through a roller.

However, in this case, since the apparatus is complicated and large in size, manufacturing costs are high, dehydration takes a lot of time, and there is a problem that a lot of moisture remains in the cake discharged due to low dehydration efficiency.

In order to improve this, in recent years, the decanter type dehydrator, which effectively separates water by centrifugal force, can be manufactured in a small size and light weight, and a solid-liquid separator having excellent dehydration effect at a relatively low speed has been developed to gradually expand its use range. There is, for example, the Patent No. 443050.

However, since the registered patent could not adjust the contact pressure of the scraper to the inner peripheral surface of the filter cylinder, when the spring with a small modulus of elasticity is installed, the scraper is too tightly adhered to the inner surface of the filter cylinder by centrifugal force, resulting in noise during dehydration operation. In addition, the durability of the filtration cylinder and the scraper is rapidly reduced, and on the contrary, when a spring with a large modulus of elasticity is installed, the dehydration sludge is not smoothly transported and the dehydration effect is reduced. Even if the scraper or the filter cylinder is worn and used during the use, the scraper or the filter cylinder may be worn and the transfer of dewatered sludge may not be carried out smoothly. There was a problem that should be.

In order to improve this, Korean Patent Publication No. 2006-0087855 has been disclosed.

However, the disclosed patent has a great effect in solving the above problems, but there is a limitation in improving the dewatering efficiency because there is almost no screw press function, and the low speed (lower than the high speed (2000-3000 rpm) decanter type dewatering device ( There is a need for structural improvements that do not fully exploit the benefits of 200-260 rpm).

In particular, in the case of a low-speed decanter type dehydrator, the key to solid-liquid separation is called a screw press function. In order to implement this, it is required that a shaft for pressing is formed separately from the feeding axis in addition to the feeding function. It is effective to be rotated separately and separately, but the disclosure does not implement such a technical configuration.

The present invention has been made in view of the above-described problems in the prior art, and solved this problem. In the low-speed decanter type dehydrator, the shaft feeding sludge and the screw pressing shaft are separated from each other and rotated therebetween. Its main purpose is to provide a new concept of a low speed centrifugal dewatering device that maximizes the dewatering efficiency by remarkably speeding up the speed.

The present invention is a means for achieving the above object, a fixed frame, a first casing installed inside the fixed frame, a first drum screen installed to be rotated inside the first casing, a tubular shape so that the raw water can be supplied and the drive source and A first cylinder that is connected and rotates and passes through the first drum screen, the first shaft being integrally fixed to the first drum screen, and provided to be rotated inside the first drum screen, and the first shaft is fixed through and the sludge discharge port is formed at a part of the length thereof. A plurality of scrapers fixed to the outer circumferential surface of the rotating cylinder and scraping the inner circumferential surface of the first drum screen, a second shaft for rotationally supporting the opposite end of the first shaft of the rotating cylinder, and a second shaft installed horizontally with the first casing and open at both ends. Casing, a second drum screen fixed inside the second casing, a wheel-shaped fixture fixed between the first casing and the second casing and bearing the second shaft, inside the second drum screen In the low speed centrifugal dewatering device comprising a screw press for feeding rotated in; The bearing structure in which the second shaft is coupled to the fixed body has a double bearing structure in which the screw shaft for rotating the feeding screw press and the second shaft are located on the same straight line, and the rotation of the screw shaft and the second shaft is separate. The rotational speed of the screw shaft is slower than that of the second shaft so as to be made by a driving source; A third casing is provided at the open end opposite to the first casing of the second casing, and the third casing further includes a pressure regulating plate for elastically sealing the open end through a spring. to provide.

In this case, the screw press is characterized in that the pitch gradually decreases in the direction from the first casing to the third casing.

In addition, the rotational speed of the second axis is maintained at 200 ~ 260 rpm, the rotational speed of the screw press is also characterized in that it is maintained at 7 ~ 8 rpm.

In addition, the double bearing structure is composed of a first bearing block and a second bearing block rotatably installed in a form surrounding the outer circumferential surface of the first bearing block, wherein the first bearing block is fixed to a fixed part only. The remaining portion is provided to protrude into the first casing, the second bearing block is installed on the outer circumferential surface of the protruding portion, the first bearing is fixed to the second shaft inside the first bearing block, and the screw press It is also characterized in that the second bearing is configured to be fixed to one end of the screw shaft is formed.

According to the present invention, the feeding shaft and the screw press shaft are separated from each other and at the same time have a remarkable speed difference, so that the liquid-liquid separation efficiency is maximized and the compression dewatering effect in addition to the centrifugation is combined, resulting in a high-efficiency sludge dewatering device at low cost. It can be provided.

1 is an exemplary front view showing the inside of the low speed centrifugal dehydration apparatus according to the present invention.
Figure 2 is an exemplary plan view showing the interior of the low speed centrifugal dewatering apparatus according to the present invention.
3 is a view taken along lines AA and BB of FIG. 1.
Figure 4 is an enlarged view showing the shaft separator of the low speed centrifugal dewatering device according to the present invention.

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

As shown in Figures 1 to 3, the low speed centrifugal dewatering device according to the present invention includes a fixed frame (100).

The fixed frame 100 is a substantially rectangular frame, and is supported by four legs (Leg) 110.

The first casing 200 and the second casing 300 are fixed to each other in a state where the first casing 200 and the second casing 300 are opposed to each other, and a first drum screen 210 is embedded in the first casing 200. The second casing 300 has a second drum screen 310 embedded therein.

At this time, the first casing 200 is a discharge hopper for discharging the first dewatered treated water, the second casing 300 is a discharge hopper for discharging the second dehydrated treated water, the second casing A third casing 400 is further provided in a state of facing the 300 so that sludge is discharged through the third casing 400. That is, the third casing 400 is a sludge discharge hopper in which dewatered sludge is discharged.

In addition, a first driving motor 220 is installed at one lower portion of the fixed frame 100, and a second driving motor 320 is installed at the other lower portion of the fixed frame 100.

On the other hand, the first side of the first casing, that is, the second through the second casing 300, the center of the end opposite end portion rotatably rotatably bearing the first penetrating exposed to the inside of the first drum screen 210 One shaft 120 is provided.

The first shaft 120 is a tubular body with a hollow inside, that is, a pipe as a pulley 130 is fixed to a portion of the length is configured to receive the power of the first drive motor 220 through the belt 140. .

In addition, one end of the first shaft 120 is connected to the raw water input pipe 160 through a mechanical seal (150).

The raw water input pipe 160 is fixed to one side end of the fixed frame 100, and is connected to the raw water supply source (not shown) and the pipe.

Therefore, when the first driving motor 220 is rotated, the raw water inlet pipe 160 maintains a fixed state, but the first shaft 120 has a structure that is rotated, and the raw water introduced is the raw water inlet pipe ( From 160 is supplied into the first drum screen 210, more precisely the rotary cylinder 230 along the hollow inside the first shaft (120).

At this time, the other end of the first shaft 120 is fixed to penetrate one side surface of the rotating cylinder 230 is configured to rotate with the rotating cylinder 230, the other end surface of the rotating cylinder 230 The two shafts 122 are fixed, and the second shaft 122 is coupled in a double bearing structure, as shown in an enlarged view in FIG. 4.

The double bearing structure may include a first bearing block 510 and a first bearing block 510 that are firmly fixed to a fixture 500 that partitions the first casing 200 and the second casing 300. It is a structure consisting of a second bearing block 520 is coupled to the bearing in a wrapping form.

In this case, inside the first bearing block 510, a first bearing 512 for supporting the second shaft 122 and a second bearing 514 for supporting the screw shaft 600 to be described later. The third bearing is built in a divided state and is rotatably coupled to a part of the outer circumferential surface of the first bearing block 510 protruding toward the first casing 200 inside the second bearing block 520. 522 is built in.

In addition, the second bearing block 520 is in close contact with or fixed to the support 530.

At this time, the support 530 constitutes the other end surface of the first drum screen 210, the rod shape is radially arranged so that the sludge inside can pass to the second casing 300, One side cross section constituting the opposite end forms a plate-closed form, that is, a supporting disc 532 (see FIGS. 1 and 2).

In addition, the first drum screen 210 is configured to rotate together because one side surface is fixed integrally with the first shaft 120.

In addition, the discharge hole (H) is formed in the vicinity of the end portion of the first cylinder 120 side of the rotary cylinder 230, the fixed rod (R) with a 90 ° interval in the circumferential direction on the outer peripheral surface of the rotary cylinder (230) Scraper (S) bound to the) is installed to be inclined slightly in the longitudinal direction of the rotary cylinder 230 is configured to be dehydrated while pushing the supplied sludge by having a spiral as a whole.

That is, the sludge introduced into the rotary cylinder 230 through the first shaft 120 is discharged into the first drum screen 210 through the discharge hole H while filling up the rotary cylinder 230.

In this state, since the entire first drum screen 210 including the rotating cylinder 230 is rotated, the discharged sludge rotates together along the inner surface of the first drum screen 210 to interfere with a plurality of scrapers S, In the process, gravity dehydration and pressurized dehydration are performed according to the push of the scraper S, and the dehydrated treated water, that is, the primary treated water, is discharged through the lower portion of the first casing 200.

Meanwhile, a screw press 610 is installed in the second drum screen 310 installed in the second casing 300.

The screw press 610 is a continuous arrangement of the screw, is installed on the screw shaft 600 rotatably installed in the second drum screen 310, the pitch of the screws in the third casing 200 side It is configured to be smaller toward the casing 400 side.

This is to increase the pressing force by increasing the compressive force.

At this time, one end of the screw shaft 600 is rotatably supported by the second bearing 514 on the first bearing block 510 fixed to the fixed body 500, the other end is a third The bearing is rotatably fixed to the outer end surface of the casing 400, the other end surface of the second drum screen 310 is open, and the pressure control plate 620 is installed at the open end surface.

In addition, the second drum screen 310 should remain fixed without being rotated.

In addition, the other end of the screw shaft 600 is penetrated to the third casing 400 and then connected to the second driving motor 320 through a means such as a belt is configured to receive power.

Here, the first shaft 120 is a low speed method is rotated at 200 ~ 260 rpm, the screw shaft 600 is a very low speed method is rotated at 7 ~ 8 rpm, so that the speed difference between the two have a remarkable gap Thereby should be configured to maximize the screwpressing function.

The pressure regulating plate 620 is disposed inside the third casing 400, and at least two or more springs 630 are installed between the rear surface of the pressure regulating plate 620 and the inner wall surface of the third casing 400. The pressure regulating plate 620 is elastically operated to always be in close contact with the open end surface of the second drum screen 310.

Accordingly, the sludge introduced into the second drum screen 310 is gradually fed toward the third casing 400 by the screw press 610 having a wide pitch of the initial portion, and the feeding speed is reduced due to the pitch narrowing gradually. That is, the feed rate is reduced. In this process, compression occurs between the preceding sludge and the sludge to be performed, and is simultaneously dehydrated while being pressed. The dehydrated secondary water is discharged through the second casing 300, and finally dehydrated. The sludge is passed to the third casing 400 and then discharged through the third casing 400.

As described above, the present invention uses a screw press to dewater the final dewatering efficiency by using a feeding pressure that is rotated at a significantly lower speed than the previous stage, thereby maximizing dewatering efficiency.

100: fixed frame 110: leg
120: first axis 130: pulley
140: belt 150: mechanical seal
160: raw water input pipe 200: the first casing
210: first drum screen 220: first driving motor
230: rotating cylinder 300: second casing
310: second drum screen 320: second drive motor
400: third casing 500: fixed body
510: the first bearing block 520: the second bearing block
600: screw shaft 610: screw press
620: pressure control plate 630: spring

Claims (4)

A fixed frame, a first casing installed inside the fixed frame, a first drum screen installed to be rotated inside the first casing, having a tubular shape so that raw water can be supplied, and connected to a driving source to rotate through the first drum screen. The first shaft fixed integrally with the drum screen, the first cylinder is rotated in the interior, the first shaft is fixed through, the length of the rotating cylinder is formed in the sludge outlet, fixed to the outer peripheral surface of the rotating cylinder and the inner peripheral surface of the first drum screen A plurality of scrapers for scraping the metal, a second shaft for supporting the opposite end of the first shaft of the rotating cylinder, a second casing installed horizontally with the first casing and open at both ends, and a second drum screen fixed inside the second casing. , A fixed body having a wheel shape fixed between the first casing and the second casing and bearing the second shaft, and a screw press for feeding installed to rotate inside the second drum screen. In the low-speed centrifugal dehydration apparatus;
The bearing structure in which the second shaft is coupled to the fixed body has a double bearing structure in which the screw shaft for rotating the feeding screw press and the second shaft are located on the same straight line, and the rotation of the screw shaft and the second shaft is separate. The rotational speed of the screw shaft is slower than that of the second shaft so as to be made by a driving source;
A third casing is provided at an open end opposite to the first casing of the second casing, and the third casing further includes a pressure regulating plate for elastically sealing the open end through a spring.
The method according to claim 1;
The screw press is a low-speed centrifugal dewatering device, characterized in that the pitch is gradually reduced in the direction from the first casing to the third casing.
The method according to claim 1;
The rotational speed of the second shaft is maintained at 200 ~ 260 rpm, the low speed centrifugal dewatering device, characterized in that the rotational speed of the screw shaft is installed at 7 ~ 8 rpm.
The method according to claim 1;
The double bearing structure is composed of a first bearing block and a second bearing block rotatably installed in a form surrounding the outer circumferential surface of the first bearing block,
Only a part of the first bearing block is fixed to the fixing body, and the remaining part is provided to protrude into the first casing, and a second bearing block is installed on an outer circumferential surface of the protruding part.
Low speed centrifugal dewatering device, characterized in that the first bearing block is divided into the first bearing is fixed to the second shaft, and the second bearing is fixed to one end of the screw shaft formed with a screw press.

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