JPH0731005B2 - Single drum dryer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to a high-concentration industrial waste liquid or a waste water treatment sludge generated in a waste water treatment facility, a raw material liquid for a feed, a fertilizer and the like, which is a mud-like undiluted stock solution and is powdered. The present invention relates to a drying device which is dried and collected as a powder product by a duct.

[0002]

2. Description of the Related Art A conventional apparatus for drying a mud-like undiluted solution supplies the undiluted solution to the outer periphery of a heating drum and heats it to dry the dried product, which is scraped and collected by a scraper knife. There is.

[0003]

In the conventional drying device as described above, since the blade edge of the scraper knife always contacts the outer periphery of the heating drum to scrape off the dried material, the surface of the heating drum is hard. Since it is necessary to prevent the wear of the heating drum by applying chrome plating to make the surface smooth, the manufacturing cost of the heating drum becomes high.

Since the scraper knife must be ground so that the dried material on the drum surface can be scraped off sufficiently, the polishing cost is high and the life of the scraper knife is only about one year.

An object of the present invention is to provide a drying device that does not use a scraper knife in order to solve the problems of the conventional drying device that uses the scraper knife as described above.

[0006]

In order to solve the above problems, the present invention provides a heating drum which is heated to an appropriate temperature and rotates around a horizontal axis, and an undiluted solution to be dried is supplied to the upper part of the heating drum. The undiluted solution supplying means, a feed roller for smoothing the undiluted solution supplied to the heating drum to a constant thickness, and the undiluted solution supplied from the undiluted solution supplying means and leveled by the feed roller do not spill from the side surface of the heating drum. In the part of the stock solution supply means and the feed roller, an end board held in a fixed position while being pressure-bonded to the side surface of the heating drum, and a high-speed rotation type roll for scraping dry matter fixed to the outer periphery of the heating drum. A structure consisting of a brush and a suction duct for sucking and collecting the dried material scraped by the roll brush is adopted.

[0007]

[Function] The undiluted solution supplied to the upper part of the outer periphery of the heating drum is leveled to a certain thickness by the feed roller, and while being held by the end board so as not to spill on both sides, it is adhered to the periphery of the heating drum and heated, and the moisture gradually increases. It evaporates to become a dried product and moves with the outer circumference of the heating drum.

Around the time when the adhering dry matter makes one round with the heating drum, the roll brush rotating at high speed in contact with the heating drum scrapes off the desiccating material adhering to the outer circumference of the heating drum to form a powder. , Suck in the suction duct and collect.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in the drawings, 1 is a left and right frame, and a shaft 4 of a heating drum 3 is rotatably supported by bearings 2 provided on the frame 1. One shaft 4 of the drum 3 is hollow and communicates with the hollow drum 3. A rotary joint 5 is provided on the hollow shaft 4, and a steam pipe 6 leading to a boiler (not shown) is connected to the rotary joint 5 via a valve 7. By blowing steam into the drum 3 through the steam pipe 6, the surface temperature of the drum 3 is about 170
Heat to ℃. Further, drain generated in the drum 3 is taken out by the drain pipe 9.

The other shaft 4 is interlocked with a driving means (not shown) to move the drum 3 in the direction of the arrow in FIG.
Turn 5 to 5 times.

A stock solution supply means 10 is composed of two distributors 11 and a plurality of discharge valves 12 in the illustrated example.
The undiluted solution sent from 3 is passed through the distributor 11 and each discharge valve 1
Discharge evenly from 2 to the entire width of the outer peripheral upper part of the drum 3. Reference numeral 15 is a feed roller having a surface plated with hard chrome, and two feed rollers are arranged. The feed roller 15 is supported on the frame 1 by an adjustable bearing so that the gap between the outer periphery of the drum 3 and the roller 15 can be adjusted. Further, the feed roller 15 is rotated synchronously with the drum 3 in the direction of the arrow in FIG. 1 so as to have the same peripheral speed as the drum 3.

Reference numeral 16 is an end board, which is a stock solution supply means 10.
Located on both sides of the part where the feed roller 15 and
It is an arc along the outer circumference of the drum 3. As shown in FIG. 3, a rubber plate 17 is attached to the end board 16 on the drum 3 side, and a spring 19 presses it against the side surface of the drum 3.

Reference numeral 20 is an adjusting screw for adjusting the strength of the spring 19, which is screwed into a female screw 21 fixed to the frame 1 and turned by a handle 22 to adjust the spring 19. The shaft 23 of the end board 16 is slidably fitted in the hole of the screw 20. Reference numeral 25 is a roll brush, and its shaft 26 is supported by a bearing 27 provided on the frame 1.

The roll brush 25 is a cylindrical brush using a steel wire or the like, and the bearing 27 is adjustable so that the contact amount of the brush 25 with the outer periphery of the drum 3 can be adjusted. The brush 25 is driven in the arrow direction in FIG. 1 at a speed 20 to 30 times that of the drum 3 by a driving means (not shown).

The upper and outer sides and both sides of the brush 25 are surrounded by the upper part of the suction duct 29, the lower end of the duct 29 is connected to the suction port of the air transport fan 30, and the discharge port of the fan 30 is connected via the duct 31. It communicates with the suction of the cyclone separator 32. 33 is an air outlet of the separator 32, 3
A product discharge port 4 has a rotary feeder 35.

To explain the operation of the above embodiment, the stock solution is discharged from each discharge valve 12 of each distributor 11, adheres to the surface of the heating drum 3 rotating in the direction of the arrow in FIG. Then, it is flattened to a constant thickness and moves with the surface of the drum 3.

The undiluted solution adhering to the surface of the drum 3 is the drum 3.
The surface of the drum 3 is gradually dried to become a dry matter 36, and when it reaches the portion of the roll brush 25, it is completely dried. Therefore, the dry matter 36 on the surface of the drum 3 is powdered by the brush 25 rotating at high speed. Becomes sucked into the duct 29,
Air transport fan 30 → duct 31 → cyclone separator 3
2, the powder is separated from the air, and the rotary feeder 3
It is recovered as a product from the discharge port 34 through 5.

[0018]

[Effect] Since the dry matter adhering to the heating drum is scraped off by a high-speed rotating roll brush, even if there are some flaws on the surface of the heating drum due to foreign matter being caught, the tips of the individual bristles of the brush are concave. To reach the place. Therefore, it is not necessary to apply hard chrome plating to the surface of the heating drum as in the conventional case. Further, since it is not necessary to grind like a conventional scraper knife, and the life of the roll brush is as long as 3 to 4 years, maintenance costs can be saved.

Many of the conventional scrapers scraped with a scraper knife are lumps, so that a crushing step is required after collection, but in the case of the present invention, the crushing step can be omitted because powder is collected. And so on.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main part of an embodiment.

[FIG. 2] Partial vertical sectional side view of the same as above.

[Fig. 3] Enlarged vertical sectional side view of the end board support portion.

[Explanation of symbols]

 1 Frame 3 Heating Drum 4 Shaft 6 Steam Pipe 10 Undiluted Liquid Supply Means 11 Distributor 12 Discharge Valve 15 Feed Roller 16 End Board 25 Roll Brush 29 Suction Duct 30 Pneumatic Conveyor 32 Cyclone Separator 34 Product Discharge Port

Claims (1)

[Claims] 1. A heating drum which is heated to an appropriate temperature and rotates around a horizontal axis, a stock solution supplying means for supplying a stock solution to be dried to the upper part of the heating drum, and a stock solution supplied to the heating drum is constant. A feed roller for equalizing the thickness, and a side surface of the heating drum at the portion of the stock solution supply means and the feed roller so that the stock solution supplied from the stock solution supply means and smoothed by the feed roller does not spill from the side surface of the heating drum. While being pressure bonded to the end board, the end board is held at a fixed position, a high-speed rotation type roll brush for scraping dry matter adhered to the outer periphery of the heating drum, and the dry matter scraped by the roll brush is sucked and collected. Single-drum type drying device consisting of a suction duct.