JPH0116496Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a fine dust remover.

A pressurized fine dust remover is used as a device to remove sieve residue in the middle of piping, but this dust remover has a drum screen inside a closed casing, and the sieve residue is retained on the outer circumferential surface of the drum screen. are removed by scraping with a scraper. This is because when the sieve residue adheres to the drum screen, the filtration of the flowing water, that is, the area through which the flowing water passes through the drum screen, decreases.
This will result in a reduction in processing capacity, and the scraper will become jammed, resulting in a failure. However, in the past, the sieve sludge caught on the screen was guided to the dust exhaust port using only a scraper, so with the stepped scraper, the sieve sludge was caught on the scraper, resulting in smooth dust removal. becomes difficult to do.

The purpose of this invention is to provide a pressurized fine dust remover that performs smooth dust removal, has stable processing capacity, and is less likely to break down. It is characterized by the provision of a rectifying plate in accordance with the

The present invention will be explained below based on the illustrated embodiments.

In the figure, 1 is a sealed casing having the required internal volume, and a rotatable drum screen 2 is provided in the center of the casing 1.
For example, as shown in the figure, it is rotated by a drive device 3 provided on the upper part of the casing.

In addition, a scraper 4 is provided within the casing 1, facing the outer peripheral surface of the drum screen and inserted into the eye of the drum screen. , and arranged in a stepwise and gentle spiral curve. Inside the casing 1, a raw water inflow pipe 5 is provided at the upper part of the outer circumference of the casing, preferably protruding in the tangential direction of the casing. When raw water is allowed to flow in from the raw water inflow pipe 5, a swirling flow is generated between the drum screen and the inner peripheral surface of the casing with the raw water filled, and the treated water filtered by the drum screen is passed through the water distribution pipe 6 provided at the bottom of the casing. It is leaked out of the casing. At this time, the drum screen is rotated by the drive device 3 at a constant speed or in an adjustable manner at a required rotational speed. Therefore, the sieve residue mixed in the inflowing raw water is blocked by the outer circumferential surface of the drum screen, but is scraped off by the scraper 4 provided so as to be slightly inserted into the mesh of the screen. The scraper 4 has a gently curved spiral shape and is provided stepwise in small blocks. For this reason, the sieve residue is sequentially guided downward to the dust exhaust port side by the stepped spiral scraper. This sieve residue may get caught in the scraper provided in steps in the form of small blocks, preventing smooth outflow. In order to prevent this, the present invention utilizes the swirling flow generated within the casing and provides a rectifying plate 7 to make the swirling flow of raw water into a spiral flow along the scraper. The sieve residue blocked by the screen is scraped off by the scraper 4, flows down in a spiral flow, and is discharged from the casing 1 through the dust discharge pipe 8 together with the dirty water.

According to the present invention, the raw water flowing into the casing is divided into small blocks and a rectifying plate is provided so that the flow flows in a spiral shape along the scraper arranged in a staircase spiral shape. This method has the advantage of being able to smoothly guide the sieve residue to the dust exhaust port side by means of flowing water to ensure the discharge of sieve residue, and to perform continuous filtration treatment of raw water without reducing the dust removal ability.

[Brief explanation of the drawing]

The drawing is a perspective view showing an embodiment of the fine dust remover of the present invention. 1 is a casing, 2 is a drum screen, 3 is a drive device, 4 is a scraper, 5 is a raw water inflow pipe, 6
7 is a water distribution pipe, 7 is a rectifying plate, and 8 is a dust exhaust pipe.

Claims (1)

[Scope of utility model registration request] In a pressurized fine dust remover, which is equipped with a rotary drum screen in a sealed casing and a scraper for removing the sieve residue caught on the drum screen, the scraper is placed in a spiral shape around the drum screen. A fine dust remover that meshes with the scraper and has a rectifying plate that matches the shape of the scraper to smooth out dust removal.