JPH0513541U - Cleaning equipment for sedimentation and residue - Google Patents

Abstract

(57) [Summary] [Purpose] Sufficiently clean sand and improve the cleaning effect. [Structure] A sediment carrying-out means 7 is provided on an inclined side wall 2 of a cleaning tank 1, a stirring blade 11 is provided on an opposing side wall 10, a lower cleaning nozzle 12 is provided below the stirring blade 11, and a rotary weir 6 is provided at an intermediate portion. Between the weir 6 and the sediment unloading means 7, a floating material unloading means 13 and a drainage trough 9 are provided, and an overflow section 22 is provided at the upper end of the rotary weir 6, and between the rotary weir 6 and the floating material unloading means 13. The secondary cleaning nozzle 23 is provided on the front and rear walls above.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cleaning device for cleaning dirty sand and residue remaining in a sand basin such as a sewage treatment plant.

[0002]

[Prior Art]

 In general, residues and sediments generated in sedimentation basins such as sewage treatment plants are not easy to dispose because they are attached with a large amount of decayed organic matter, which causes odor and deteriorates the environment in terms of hygiene. It is being cleaned. Conventionally, this seed sand washing device is one in which a stirring blade is provided in the washing tank to stir and wash, and organic matter is separated from the residue, sand, and gravel, and then discharged separately from the tank.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional technique, there is a problem that the cleaning is not sufficiently performed and the cleaning is not performed effectively. The present invention has been made in view of the above situation, and an object of the present invention is to provide a cleaning apparatus for sand, residue, etc. that can effectively perform sufficient cleaning.

[0004]

[Means for Solving the Problems]

 In the present invention, the following technical measures are taken in order to achieve the above object. That is, according to the present invention, one side of the cleaning tank is used as an inclined side wall to provide the sediment discharge means, the opposite side wall is provided with the stirring blade, and the intermediate portion is provided with the rotary weir so as to be rotatable around the horizontal axis. , A suspended matter discharge means is provided between the weir and the sediment discharge means, a drainage trough is provided between these discharge means, and an overflow portion is provided at the upper end of the rotary weir, and below the stirring blade. It is characterized in that a lower cleaning nozzle is provided and a secondary cleaning nozzle is arranged between the rotary weir and the suspended matter discharge means.

[0005]

[Action]

 According to the present invention, the cleaning water is injected into the tank, and the tank is divided into the primary cleaning chamber and the secondary cleaning chamber by the rotating weir, and the stirring blade is rotated into the primary cleaning chamber to remove the residue and sediment. Add sand and stir for a predetermined time. After the primary cleaning is completed, the rotary weir is rotated by a predetermined angle to allow floating matters such as residue and organic matter to overflow from the overflow section. At this time, the secondary washing water is sprayed from the secondary washing nozzle to the secondary washing water to wash it, and the washing water is rinsed while pouring the washing water into the primary washing chamber. Then, the suspended matter carry-out means carries out suspended matter such as residue.

Next, the rotary weir is further rotated to open the space between the lower end of the rotary weir and the bottom of the primary cleaning chamber, and the cleaning water is sprayed from the lower cleaning nozzle so that the sediment at the bottom is directed to the lower end of the sediment discharge means. At the same time, the sediment is carried out and the settling means is operated to carry out the sediment. The above operation completes one cycle of washing of sand and the like.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the drawing, (1) is a washing tank, and one side is an inclined side wall (2) which is inclined toward the middle portion, and a sand pit (3) is formed at the middle bottom portion, and the pit (4) of the tank bottom (4) is formed. 3) Immediately above the side edge, a rotary weir (6) is rotatably provided via a horizontal shaft (5), and the rotary weir (6) divides a part of the tank (1) into two parts. The primary cleaning chamber (1A) and the secondary cleaning chamber (1B).

The inclined side wall (2) is provided with a deposit carrying-out means (7) consisting of a screw conveyor, and a lower end of the screw (8) extends into the sand setting pit (3). A drainage trough (9) is provided above the sediment carrying-out means (7). Further, a stirring blade (11) is arranged on the opposite side wall (10) of the inclined side wall (2), and a lower cleaning nozzle (12) is arranged at the lower end thereof. A suspended matter carry-out means (13) is arranged between the rotary weir (6) and the drainage trough (9).

The floating material discharge means (13) includes a grid bar screen (14), an endless chain (15), and a plurality of scrapers (16) fixed to the chain (15) at predetermined intervals. It is made up of scraps, scraps, organic substances, and the like, which are scraped up and dropped on a conveyor (17).

One end of the horizontal shaft (5) is projected to the outside of the tank (1), and a drive arm (18) is fixed thereto. (19) is a cylinder for driving a rotary weir, (20) is a bell crank, one end of the crank (20) is connected to a rod end (19A) of the cylinder (19), and the other end is an upper end of a connecting rod (21). And the lower end of the connecting rod (21) is connected to the arm (18).

The rotary weir (6) has an upper end portion which is cut out at both ends in the front-rear direction to form an overflow portion (22). A part of the tank bottom (4) on the side of the sand pit (3) where the lower end of the rotating weir (6) slides or is close to is an arc surface (4A), and floating matters are collected from the overflow section (22). The weir is in a closed state even when it is inclined to overflow.

The front and rear walls of the cleaning tank (1) are located between the rotary weir (6) and the suspended matter discharge means (13) and slightly below the full water level, and further, the rotary weir (6). The secondary cleaning nozzle (23) for spraying high-pressure water to the suspended matter in the posture of the overflow gradient is installed. Reference numeral (24) is a partition plate provided between the front and rear walls of the cleaning tank (1) and the bar screen (14). The partition plate (24) and the rotary weir (6) are provided with a secondary cleaning chamber (1B). ).

In the above embodiment, when washing sand, washing water is injected into the washing tank (1), the rotary dam (6) is closed as shown by the solid line in FIG. 1, and the stirring blade (11) is operated. On the other hand, in the primary cleaning room (1A), the residue, the sand, etc. are charged, and the adhered organic substances are separated by stirring and cleaning for a predetermined time. After the completion of the primary cleaning, the rotary weir (6) is slightly rotated by the cylinder (19) to make the overflow inclination posture shown by the chain double-dashed line (6A) in Fig. 1, and the cleaning water is placed in the primary cleaning chamber (1A). While pouring and rinsing, the suspended matter is overflowed from the overflow section (22) and transferred to the secondary washing room (1B).

The cleaning water at this time may save water, so that the water in the tank (1) may be circulated between the floating material carry-out means (13) and the drainage trough (9). Further, the suspended matter was hit by the high-pressure water from the secondary cleaning nozzle (23) beyond the overflow part (22), human feces and the like were crushed and secondary cleaned, and the bar screen (14). It is collected by the scraper, scraped up by the scraper (16), dropped on the conveyor (17), and carried out of the tank (1). The wash wastewater is then discharged from the drainage trough (9).

When the overflow of the suspended matter is completed, the rotating weir (6) is rotated by the cylinder (19) while the stirring blade (11) is rotated, and the weir opening shown by the chain double-dashed line (6B) in FIG. 1 is performed. At the same time, the high-pressure water is sprayed from the lower cleaning nozzle (12), and the sediment such as sand and gravel that has settled on the bottom (4) of the tank is discharged and moved into the settling pit (3). The sediment in the settling pit (3) is carried out of the tank (1) by the sediment carrying-out means (7). In this way, when one cycle of cleaning is completed, the rotary weir (6) is closed and the stirring blade (11) is rotated to remove the next residue, sediment, etc. in the primary cleaning chamber (1A). And repeat the above operation.

According to the above-mentioned embodiment, since the overflow portion (22) is provided on both sides of the upper end portion of the rotary weir (6), the cleaning effect by the high pressure water from the secondary cleaning nozzle (23) is enhanced, It is possible to reliably separate the organic matter. The present invention is not limited to the above embodiment, and the design can be appropriately changed.

[0017]

[Effect of the device]

 As described above, according to the present invention, the rotary weir is provided to partition the primary cleaning chamber and the secondary cleaning chamber, and the primary cleaning chamber, the secondary cleaning chamber, and the sand cleaning chamber can be rotated in three positions. It is possible to reliably separate organic matter from settling sand, and to perform sufficient cleaning and effectively perform it. Further, since the lower cleaning nozzle is provided, sediment such as sand settled on the bottom of the tank can be reliably transferred to the discharging means. Furthermore, since the overflow weir is provided in the rotary weir and the secondary cleaning nozzle is provided, secondary cleaning of suspended matter such as residue can be reliably and effectively performed.

[Brief description of drawings]

FIG. 1 is a central longitudinal front view showing an embodiment of the present invention.

FIG. 2 is a partially omitted plan view of FIG.

3 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols] (1) Cleaning tank (2) Inclined side wall (4) Tank bottom (5) Horizontal axis (6) Rotating weir (7) Sediment discharge means (9) Drainage trough (10) Opposing side wall (11) Stirrer (12) Lower cleaning nozzle (13) Floating material discharge means (22) Overflow part (23) Secondary cleaning nozzle

Claims (1)

[Scope of utility model registration request] 1. A sediment carrying-out means is provided with one side of the washing tank as an inclined side wall, a stirring blade is arranged on the opposite side wall, and a rotary weir is arranged in the middle part so as to be rotatable around a horizontal axis. Floating material unloading means is provided between the weir and the sediment unloading means, a drainage trough is provided between both unloading means, an overflow portion is provided at an upper end portion of the rotary weir, and a lower portion is provided below the stirring blade. A cleaning device for sedimentation, residue, etc., characterized in that a cleaning nozzle is provided and a secondary cleaning nozzle is arranged between the rotary weir and the floating material discharge means.