JPS5983920A - Predrying machine for activated carbon - Google Patents

Abstract

PURPOSE:A predrying machine designed to predry wet activated carbon efficiently by packing the wet activated carbon on the outside of a covered cylinder consisting of a punched metallic plates, and blowing hot air into the above- mentioned cylinder. CONSTITUTION:A predrying machine having a cylinder 1 consisting of a punched metallic plate for placing wet activated carbon 4 with about 80% moisture content on the outside thereof and a pipe 5 for pressing in hot air at about 350 deg.C in the interior of the pipe 5, reversing the hot air at the ceiling of the cylinder 1 and bringing the hot air into contact with the wet activated carbon 4 in the hole parts of the cylinder 1 while lowering the hot air along the helical guide blades 6 to dehydrate the activated carbon 4 and a hopper 9 for accumulating the dehydrated activated carbon 4 (with about 40% moisture content), having no adhesive force between particles, and flowed down in the bottom thereof and discharging the activated carbon 4 through small holes 7 thereof and further a gas discharge hole 8 for discharging the hot air separated from the dehydrated activated carbon 4. The above-mentioned predrying machine is used by connecting the gas discharge hole 8 in the former stage to the hot air introductory hole 5 in the latter stage in the manner of plural arranged machines.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an activated carbon pre-dryer used for drying wet activated carbon.

Conventionally, when activated carbon is regenerated and activated in a direct current electric furnace,
When the activated carbon contained a large amount of water, it was dehydrated as much as possible using a centrifuge or the like before being charged into the furnace. However, with this degree of dehydration, the rate of temperature rise of activated carbon in the furnace is slow, and the temperature distribution in each part of the activated carbon layer becomes extremely uneven, reducing the furnace's ability to regenerate waste and reducing the quality of recycled products. ;Ku,
There is a lot of variation, and there are disadvantages such as the separation of moisture, which interferes with the operation of the furnace, and furthermore, the moisture content is 32% (D, B,)
It became necessary to lower the figure below.

The present invention has been made to eliminate these drawbacks, and will be explained with reference to FIGS. 1 and 2. Activated carbon dehydrated by centrifugation P71f, tN has a moisture content of only about 80% (D, B,), for example, in the case of crushed coconut shell charcoal for water treatment (10 to 60 mesh). Therefore, when wet activated carbon 4 is placed on the outside of a cylinder 1 made of punched metal as shown in Figure 1, and hot air of about 650°C is introduced into g5 that guides the hot air inside the cylinder 1, this hot air will Climb up Wisdom 5 and reach the ceiling of Cylinder 1 1-5 Cylinder 1
1. descends through the inside of the pipe 5 and the outside of the pipe 5. At this time, since there are guide wings 6 for cicada swirling on the outside of the tube 5, the hot air is not circulated, but descends, and comes into sufficient contact with the inner wall of the cylinder 1, and the cylinder 1 has 5 to 6 gates. Since it is made of φ punched metal 1, the hot air and wet activated carbon come into direct contact at the holes in the punched metal, and the activated carbon loses moisture and loses its strength due to the moisture between the particles, resulting in a moisture content of 40. % (D, B,)
8g (each grain of D, yr, 17ii of K) falls one after another along with L. The activated carbon dropped with the hot air enters the hopper 9, where it is separated from the hot air, accumulates at the bottom of the hopper 9, and is discharged to the outside through the small holes 7 together with a portion of the hot air. On the other hand, the hot air separated from the activated carbon in the hopper 9 is discharged through the exhaust pipe 8.

As shown in Figure 2, the 1
, Sequentially, the hot air P lowers in temperature and is discharged from the end.

Next, I will explain the implementation.

In Fig. 1, the thickness of Nonandji metal (6φ hole) is 0.
5-1 Use a cylinder 1 with an inner diameter of 155 holes and a length of 600 bars, and inside the cylinder, 21);
? :Four spiral-shaped guide vanes 6 with a height of 42 gates and a pitch of 52 gates are connected in series at intervals of 60 mm on the outer wall of the cylinder 1, and between the cylinders 1 is a centrifugally dehydrated water-containing tube. Rate 80% (])
, B, ) -V shell crushed activated carbon (10 to 30 mesh) was inputted at No. 1, inlet temperature 320°C, flow rate 2rn/S.
Then, hot air was sent into the pipe 5. The hot air temperature was 250°C at the small end of the first stage, 190°C at the second stage exit, 140°C at the rabbit and sixth stage exit, and 120°C at the fourth stage Yamaguchi, resulting in a loss. Preparation 5 Drying - The activated carbon that has fallen from the punch hole of the cylinder 1 is discharged from the small hole 7 of the stopper ζ9, and the drying temperature is 1.26 Kq/h and the water content is 40% ( D, B,)
In advance, Mj was dry at 11.

Furthermore, this i1″Ff: hot air temperature 350°C, air volume 0.32
Air dry at rr//m, exhaust temperature 150℃, 1
After time r-1, dry activated carbon with a moisture content of 2% (D, B,) could be prepared.

In addition, the hot air used for preliminary drying may be used as is from the exhaust air from the final ventilation drying process, or may be used by pre-heating the air, or may be used by creating new heated air. Good too.

In this way, when activated carbon pre-dried by the pre-dried Mi dryer of the present invention is used for final drying,
When endogenous activation is performed using a 7-air furnace with good ventilation, evenness, and quick drying, the temperature distribution of the activated carbon layer inside the furnace becomes even, the heating rate is fast, and the quantitative capacity of the furnace is improved. However, the quality of recycled and activated products has also improved significantly.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of one activated carbon pre-dryer of the present invention. Figure 2 is a longitudinal cross-sectional view of an activated carbon pre-loading dryer in which all single-cell dryers are connected in rows. 1 is a cylinder, 2 is an activated carbon drop hole, 6 is a shelf board, 4 is wet activated carbon, 5 is a tube, 6 is a guiding blade, 7 is a small hole, 8 is an exhaust pipe, and 9 is a hopper. Patent applicant Yasuzo Nakao

Claims (1)

[Claims] As shown in Figure 1, nocent metal (or wire mesh)
A cylinder 1 with a lid made of is attached vertically and upwardly to a shelf board 3 having an activated carbon falling hole 2 at a position where the inner diameter of the cylinder 1 and the activated carbon falling hole 2 match, and the upper part of the shelf board 3 is One cylinder of activated carbon 4 is placed outside the cylinder 1. Inside the cylinder 1, there is a g that receives hot air from the outside and guides it from the bottom to the top.
5, and the outside of the tube 5 has a spiral guide wing 6. Below the shelf board 3, there is a hopper 9 with a small hole 7 and an exhaust pipe 8 at the bottom, and these form one unit of the pre-dryer, and a plurality of these are connected in series as shown in Fig. 2. In a row, 1st
W in the pre-dryer on the shelf? , the wind is exhausted to the blowgun through a pre-dryer adjacent to it, - the live-temperature activated carbon 4 is brought into contact with the hot air at the hole of the cylinder 1 to reduce its moisture content and become a single particle, which is then transferred to the blowgun. The grains fall and separate from the hot air in the hopper 9, and the grains enter the small hole 7.
Activated carbon pre-dryer characterized by more discharge to the outside