JPS6297700A - Apparatus for treating dehydrated cake - Google Patents

Abstract

PURPOSE:To enhance pulverizing operation, by mounting an auxiliary agent supply apparatus, a primary grinder, a quick lime supply apparatus, secondary grinder and a third grinder. CONSTITUTION:The cake dehydrated by a filter press 11 is supplied to a first conveyor 12 and thrown in a primary grinder 15 while a grinding aid is supplied to the cake on the first conveyor 12. Thereafter, the cake is supplied to a second conveyor 16 and quick lime is delivered from a rotary feeder 21 to be supplied to the cake on the second conveyor 16. The cake is thrown in a secondary grinder 17 to be sufficiently mixed with quick lime and ground. This cake is supplied to a third conveyor 18 and transported to be thrown in a third grinder 22 where the cake is pulverized into particles with a particle size of 25mm or less. These particles are transported by a fourth conveyor 23 to be stored as a treated cake 19. By this method, treatment cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for treating a dewatered cake of waste mud generated in crushed stone manufacturing equipment and the like.

[Conventional technology]

Sludge water that comes out when crushed stone is washed with water during the manufacturing process of crushed stone manufacturing equipment is subject to legal regulations and cannot be discharged directly into rivers. It was dumped at a disposal site. However, as it is often difficult to secure a disposal site, in some cases, in order to make effective use of the cake, quicklime is mixed into the dehydrated cake for stabilization treatment, and then mixed with particle size-adjusted crushed stone, etc., and used as road base material. There are examples of it being used as a construction material. As shown in FIG. 2, this treatment device supplies a cake obtained by dewatering waste mud using a filter press 1 to a first conveyor 2, and onto this first conveyor 2, quicklime is transferred from a quicklime silo 3 to a raw lime feeder 4. Extract quantitatively.

After the cake and quicklime are put into a paddle mixer 5 and mixed, they are transported by a second conveyor 6 and stored as a treated cake 7.

[Problem that the invention seeks to solve]

Dehydrated cake has a high water content and is composed of clay and silt, so it has strong adhesion (in order to mix it with particle size adjustment crushed stone, etc., the moisture content must be set to 20% or less to sufficiently crush and divide into two particles). However, in the conventional treatment, the amount of quicklime mixed in was about 5% of the dehydrated cake, resulting in poor crushability and insufficient granulation.Therefore, in order to improve this, the amount of mixed quicklime was increased. If it were increased, there was a problem that the processing cost would increase because the conventional equipment mixes only quicklime.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dewatered cake processing apparatus that reduces the amount of quicklime mixed in, reduces processing costs, and improves the crushability of the cake into two particles.

[Means for solving problems]

The dewatered cake processing device of the present invention includes an auxiliary agent supplying device for supplying a crushing aid to the cake, a primary crusher for crushing the cake supplied with the crushing aid, and a primary crusher for crushing the cake. a quicklime supply device that supplies quicklime to the cake crushed in the secondary crusher, a secondary crusher that mixes and crushes the cake supplied with quicklime, and a secondary crusher that further crushes and granulates the cake crushed by the secondary crusher. It is equipped with a tertiary crusher that converts into

[Function] In the processing apparatus of the present invention, quicklime is added to the dehydrated cake that is supplied with a crushing aid and crushed in the primary crusher, crushed in the secondary crusher, and further crushed in the tertiary crusher. Crushing and sizing are performed. By mixing in the crushing aid, the moisture content of the cake is reduced and the cake is sufficiently crushed into single particles, so the chemical reaction between the quicklime and the cake takes place effectively, and the amount of quicklime used can be kept to a minimum. .

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing the configuration of a dehydrated cake processing apparatus according to an embodiment of the present invention. This processing equipment includes a filter press 11, a primary crusher 15°, a secondary crusher 17. and tertiary crushers 22 are arranged in sequence, and these are connected to the first conveyor 1.
2. A second conveyor 16 and a third conveyor 18 are connected to each other, and an auxiliary agent supply device consisting of an auxiliary agent silo 13 and a rotary feeder 14 is provided on the first conveyor, and a quicklime silo 20 and a rotary feeder 21 are provided on the second conveyor. A quicklime supply system consisting of 23 is a fourth conveyor for transporting the treated cake 19.

The filter press 11 dehydrates waste mud water and turns it into a cake.
Here, the dehydrated cake is supplied to the first conveyor 12. A fixed amount (20 to 30% of the cake amount) of the crushing aid is cut into the cake on the first conveyor 12 by the row feeder 14, and the cake to which the crushing aid has been supplied is first crushed [ 1
It will be put in at 5. The crushing aid is desirably a dry fine powder that is inexpensive, and in this embodiment, stone powder is used, which is obtained by collecting dust generated in crushed stone manufacturing equipment with a dust collector.

This is a dry powder mainly composed of SiO□, which had no utility and was previously discarded at a disposal site.

The primary crusher 15 is a disk rotary crusher, and crushes the cake into about 100 fl. This cake is supplied to the second conveyor 16, and quicklime is added to the cake on the second conveyor 16 in a fixed amount (2 to 3% of the cake amount) by the rotary feeder 21.
The cake that is cut out and supplied with quicklime is subjected to secondary crushing [17
will be put into the The secondary crusher 17 is a paddle-type mixing crusher, which sufficiently mixes quicklime and cake and crushes them.

This cake is supplied to the third conveyor 18 and transported.
Next, it is put into the crusher 22. The tertiary crusher 22 is a rotary shearing type crusher, and final crushing is performed here to reduce the cake to 25N or less particles with quicklime and stone powder attached to the surface. The sized particles are transported by the fourth conveyor 23 and processed into the cake 1.
It is stored as 9.

This treated cake is mixed with particle size-adjusted crushed stone and used as road base material, but the cake treated in this example and particle size-adjusted crushed stone (M-40) are mixed at a mixing ratio of 2:8 to 1:9. The corrected CBR (subgrade soil bearing capacity ratio) is 90 to 12.
0%, and the modification CB of the upper subbase material according to the pavement guidelines regulations.
It fully satisfied the R of 80% or more.

〔Effect of the invention〕

Since the treatment apparatus of the present invention has the above-described configuration, the cake is sufficiently crushed and sized, and the amount of quicklime required is the minimum required for the chemical reaction, thereby reducing treatment costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the structure of a dehydrated cake processing apparatus according to an embodiment of the present invention, and FIG. 2 is a diagram showing the structure of a conventional dehydrated cake processing apparatus. In the figure, 11 is a filter press, 12 is a first conveyor, 1
3 is an auxiliary agent silo, 14 is a row feeder, 15 is a primary crusher, 16 is a second conveyor, 17 is a secondary crusher, 18
is the third conveyor, 19 is the treated cake, 20 is the quicklime silo, 21 is the rock feeder, 22 is the tertiary crusher, 23
is the fourth conveyor.

Claims (1)

[Claims] An auxiliary supply device that supplies a crushing aid to the cake, a primary crusher that crushes the cake supplied with the crushing aid, and a supply of quicklime to the cake crushed by the primary crusher. A quicklime supply device for mixing and crushing the cake supplied with quicklime 2
A dewatered cake processing device comprising a secondary crusher and a tertiary crusher for further crushing and sizing the cake crushed by the secondary crusher.