JPS6028801A - Drying method of liquid material - Google Patents

Abstract

PURPOSE:To improve the drying efficiency by spraying a liquid to be treated on the surface of a dried solid material in the drying method by forming a film of the liquid to be treated on a rotating drum. CONSTITUTION:The liquid to be treated is supplied into a liquid storage part 13 from a supply pipe 14, and the film of the liquid to be treated is formed on the surfaces of drums 1a and 1b. Heated steam is supplied to the inside of the drums to dry the film of the liqid to be treated. The liquid to be treated is blown upon the dried film from a spary nozzle 16 to thicken the film on the drums 1a and 1b. The dried film is scraped off with a knife 11, and discharged from a chute 17. The steam is discharged from a ventilator 8.

Description

[Detailed description of the invention] This invention is based on the mirabilite discharged from the souffler.

This invention relates to a method for drying low-viscosity liquid materials such as common salt, magnesium hydroxide, starch, plant extracts, brewer's yeast, and gelatin.

As a method for drying liquid materials, the liquid material is deposited in a film form on the surface of a heated rotating drum, dried while the drum is rotating, and the dried solid material is peeled off with a knife (for example, No. 24161).

By the way, in the above-mentioned rotary drum type liquid material drying method, the attachment position of the knife that is brought into pressure contact with the drum is moved from the position where the liquid material is attached to the roadside position in the rotational direction, and the amount of attached liquid material is almost the same. However, depending on the heating temperature of the drum and the type of liquid, the water may already evaporate and become viscous at a position a little distance from the point where the liquid is mixed, and it may dry completely far before it reaches the knife. There are cases,
This resulted in a loss of heating heat for the drum and did not improve drying efficiency.

This invention solves the above-mentioned problems of the conventional liquid material drying method in which a heated rotating drum is coated with a liquid material in the form of a film and the dried solid material is peeled off with a knife. The objective is to improve the efficiency of the heating heat amount and drying capacity of the drum.

That is, the present invention is characterized in that the liquid material is sprayed onto the circumferential surface of the drum between the liquid material melting position and the knife pressure contact position on the drum, and overlapping the surface of the solid material that has been compressed and dried.

The details of this invention will be explained below based on the embodiments shown in the accompanying drawings.

In FIGS. 1 and 2, numeral 1 is a drum supported by a shaft within a cover 2, numeral 3 is a geared motor that drives the drum 1, and numeral 4 is connected to a pipe shaft 5 of the drum 1. This is a rotary joint that connects a pipe (not shown) that supplies steam for heating the drum.

A V-belt is stretched between the drum 1 and the geared motor 3 on the pulley of each shaft, and a safety cover 6 is installed.
covered with. 7 indicates a fan connected to the exhaust pipe 8 at the top of the cover 2.

A tray 9 for collecting liquid is provided below the drum 1.
The lower side of the drum is immersed in a liquid 10.

On the circumferential surface of the drum 1, a peeling knife 11 is installed in pressure contact with the circumferential surface of the drum at a position on the road side in the rotational direction of the drum from a portion immersed in the liquid substance 10. Reference numeral 12 denotes a handle that protrudes from the cover 2 and adjusts the degree of pressure contact of the knife.

The first queen is a single drum, but it can also be a double drum as shown in Figure 3. In this structure, the drums ia,
-ib is in contact, and the two sides of the contact area of both drums are the liquid reservoir part 1.
3. The tip of the liquid supply pipe 14 is located above the liquid reservoir.

Further, a receiving tray 15 for a cylinder leaking from the liquid reservoir 13 is provided below where both drums come into contact. 11 designates a knife similar to that in FIG.

In the above-described structure, the present invention has a structure in which the spray nozzle 16 is installed so that the spray nozzle 16 faces the surface I of the drum between the position where the liquid is applied to the drum and the position where the knife is in pressure contact with the drum in the rotational direction of the drum. It is.

Although not shown, these spray nozzles are connected to a liquid tank.

In FIGS. 1 and 2, 17 is a chute disposed directly below the knife 11, and 18 is received within the chute.

a screw for discharging the dry solids peeled off with a knife;
19 indicates the geared motor. These devices are the third
The structure shown in the figure also has the same structure, but is not shown. 20 indicates an inspection window.

This invention is as described above, and when a liquid material is deposited in a film form on a heated rotating drum, the water content of the deposited liquid material evaporates and becomes viscous, which further dries. At the point where there is a dry and solidified film and there is still time required for it to reach the knife, a liquid is sprayed onto the dried film, so the thickness of the dried film at the point where it reaches the knife is correspondingly thicker. This has the excellent effect of increasing the drying efficiency and almost eliminating heat loss in heating the drum.

[Brief explanation of drawings]

FIG. 1 is a front view of an example of a device used in the method of the present invention;
FIG. 2 is a longitudinal sectional side view of the same example, and FIG. 3 is a longitudinal sectional side view of another example. 1.1 a, 1 b...drum, 10...liquid, 11...knife, 16...spray nozzle. Patent Applicant: Rikinnun Industrial Co., Ltd. Agent: Kama 1) Text 2 Figure 1 7 Figure 2

Claims (1)

[Claims] A liquid material is deposited in a shape of "I" on the surface of a heated horizontal rotary drum, dried during the rotation of the drum, and then dried by a knife pressed against the circumferential surface from the tableting position of the liquid material at a position on the road side in the direction of rotation. In a method of drying a liquid material, the liquid material is sprayed between the liquid material attachment position and the knife pressure contact position on the peripheral surface of the drum and overlapping the surface of the neck-dried solid material. A method for drying a liquid material, characterized by spraying it with a nozzle.