JPS614553A - Apparatus for dehydrating wet powder and wet granule having abrasive property - Google Patents

Abstract

PURPOSE:To reduce the cost by providing a fan in the middle of a system wherein dehydration is carried out by the synergetic effect of the sucking force of a suction rotor and the sucking force of the fan in the titled apparatus for dehydrating wet granules having an abrasive property. CONSTITUTION:Wet powder and wet granules to be dehydrated are successively charged from a chute 1b, and discharged into a suction rotor 2 by the operation of a fan 1a along with an air current through a gas supply pipe 1. The material is blown against the revolving blade 2a of a suction fan, the water is aspirated by a casing 4 from a slit 2b along with the air current, and the material is dehydrated. The material with reduced water content is slid along the front surface by the revolution of the fan blade, and dropped into a material recovery chute 3a. The water and the air current in the casing are separated by the difference in weight, and the water is dropped into a water recovery chute 4b. The air contg. mist is sucked into a main suction duct 5, and the mist is separated by a separator 6. The air freed of the mist is sent into the suction port of the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a mechanical dewatering device for reducing the moisture content of high-moisture raw materials, such as abrasive wet powders and wet powders.

Conventional technology During wet powder and mechanical treatment (hereinafter abbreviated as dehydration operation) to reduce the moisture content of the wet powder and obtain a single grain of low moisture powder,
■Unable to operate continuously for long periods of time due to wear and holes; Uneconomical due to high-energy raw material; ■Environmental deterioration due to scattering of some fine powder; disadvantages of the nose.

For example, granulated slag is produced by quenching molten metal seed slag (molten slag) with high-pressure water in a furnace at a steelworks, and producing glassy or crystalline solid powders and granules (
Granulated slag (so-called granulated slag) is manufactured and used as raw material for cement and other uses.Due to the manufacturing process, this granulated slag is porous and extremely abrasive. Since the water content is 70~
If it is as high as 75% and used as raw material by each customer,
This poses problems in terms of handling and energy costs.

Therefore, in order to remove this moisture, high-temperature waste heat from hot air ovens, heating furnaces, soaking ovens, etc. is often used for drying.

However, this method has the drawbacks of high equipment costs, requiring a vast site, and high energy costs and hunting costs.

Problems to be Solved by the Invention The present invention aims to eliminate the above-mentioned drawbacks and to provide a mechanical dewatering device j4 that is compatible with the properties of granulated slag.

Means to solve problems The present invention will be explained based on the drawings.

The device of the present invention has the configuration shown in FIG. 1, (1)
is an air flow supply pipe that supplies high moisture raw materials such as wet powder and wet powder into the dehydrator, (1a) is a fan that sends air flow, and (lb) is an air flow supply pipe that supplies high moisture raw materials to (1). The chute is connected to the airflow supply pipe (1). (2
) is a suction rotor installed at a position facing the outlet of the airflow supply pipe (1), and has special slits (2b) in the radial direction around it, and is concave toward the airflow supply pipe side. A suction fan plate (2a) configured on a conical surface and responsible for direct dewatering operation is provided. This suction fan plate (2a) is composed of a plurality of equally divided plates.

(2C) The above suction fan blade (
2a) is worn out and the entire rotor becomes unbalanced,
This is a balancer that can be easily adjusted in a short time when vibrations start to occur, and is attached to the rotor shaft. (2e) is a bearing with anti-vibration rubber that supports the suction rotor (2). (2d)
is a rotational drive device for the suction rotor (2).

(3) The suction rotor (
2) and the cage surrounding the front surface of the suction fan plate (2a) 7-(3a3.iiii3.aa,e.oh, 6) This is a raw material recovery chute for sending to the g process.

(4) is the suction rotor +21 and the suction fan plate (
2a) A casing that wraps around the rear surface and secures the suctioned exhaust air, (4a) is an exhaust casing that prevents the air sucked from the suction rotor (2) K from scattering, and (4b) separates the moisture sucked in with the exhaust air. (7) Amagi recovered schnide.

(5) is the airflow supply pipe (
A main suction duct connecting an exhaust casing (4a) and a fan (1a) for reuse in the air flow supply device (1), and a suction fan exhaust that is reused in the middle of the main suction duct (5). Fine 11 mixed in the form of mist or fine powder... 1'flffl to remove water droplets and fine powder
aW (61 and D when the suction fan capacity and airflow supply capacity become unbalanced in front of the fan (1a))
A suction hole (5a) is provided for adjusting the damper L81.

In the apparatus of the present invention constructed in this way, when wet powder, wet powder, and ia moisture raw material are sequentially introduced from the chute (lb), the high moisture raw material is supplied with an airflow by driving the fan (1a)! ! The suction fan plate (f ti) is discharged together with the air flow towards the suction rotor 12), where it is already rotated by the rotary drive (2d).
As the air flow is sucked into the open side exhaust casing (4) through the slit (21)) of 2a), the raw material is attracted to the suction fan plate (2a), and its moisture is sucked into the suction fan plate (2a) along with the air flow. ) on the back side of the casing (
4), the moisture in the raw material is suctioned and dehydrated, and the low-moisture raw material from which this moisture has been removed slides down the front surface by the rotational force of the suction fan plate (2) and passes through the raw material collection chute (3).
a) and is collected. On the other hand, the suction fan blade (2
The water and air flow that has passed through a) is separated into water and air in the casing (4) due to the difference in volume, and the water falls into the water recovery chute (4b) of the goya and is collected. At this time, the pressure air separated from the water is exhausted by adjusting the opening degree with the turner (7) in the water recovery chute (4b) and adjusting the pressure inside the casing (4) to the most suitable for separating water. From the casing (4a), the main suction duct (5) passes through the separator (61), where the fine wood chips mixed in the exhaust air are removed.
Remove fine powder.

It is fed into the suction port of the fan (1a) again, and the fan (
If there is an imbalance between the amount of air supplied by 1a) and the amount of air to be reused, the damper (8) can be used to suck in atmospheric air by adjusting the sub-suction rate (5a) once (5a).
It is designed to be used for If +'A flight.

Embodiment FIG. 2 shows an embodiment in which the apparatus of the present invention is installed in a granulated slag dewatering treatment plant, and its functions will be explained.

0°C is the cutting part hopper that stores granulated slag, (2) is the feeder installed under the cutting port that can separate large lumps of slag, and (2) is the raw material input chute (lb) of this equipment. The high-moisture granulated slag is fed by a crane cf into the cutting section hopper OD, which is equipped with a gate to adjust the cutting amount.
The 5 pieces are cut out by the feeder and placed on the variable speed supply conveyor 03, and then transferred to the input chute (lb) of the dewatering system.
) and are sequentially introduced into the airflow supply g(1).

4 The injected madder water granulated slag is passed through a fan (υ
is sent into the dehydrator together with the pressurized airflow through the airflow supply g(1). At this time, the drive device (2d)
The high-moisture granulated slag is attracted to the rotating suction fan plate (2a), and the moisture is sucked into the exhaust casing (4) on the back side through the slit (2b) of the suction fan plate (2a), and is sucked downward. The water is collected through the water collection chute (4b).

On the other hand, the low-moisture granulated slag from which water has been removed slides down the front surface by the rotational force of the suction fan plate (2a) and is collected by the raw material collection chute (3a) below, and is transported to a low-moisture granulated slag by the collection conveyor A4 installed at the outlet of the chute (3a). The granulated slag is temporarily stored in the granulated slag shipping hopper αG and transported to the customer's factory by truck Oe. The air and moisture sucked into the back side of the suction fan plate (2a) are separated in the exhaust casing (4) by the difference in irises volume, and the water goes downward as described in 111 and is appropriately removed by the chute (4b) and pipe. It is guided to a nearby tank αη and is pumped to a reuse destination using a pump O bladder.

On the other hand, the air is collected under the exhaust casing (4).
Since the pressure inside the casing is adjusted to the most suitable pressure for moisture separation, this pressurized gas flows into the upper part of the exhaust casing (4a). From the main suction duct (5), a fan ('1
It is connected to the suction port in a) and is reused to save energy.

However, the pressurized gas sent through the main suction duct (5) contains fine wool, needle-like slag, and paper-like mist, so it cannot be reused as it is, so the main suction duct A separator (6) is installed in the middle of (5) to remove these from the system.Also, the amount of air sent into the high moisture granulated slag by the fan (1a) and the main suction tact ( When an imbalance occurs in the amount of air reused through step 5), the damper (8) adjusts the amount of air in the sub suction hole (5a) to suck in atmospheric air and adjust the amount to an amount suitable for supplying airflow.

Figure 5 shows dehydration of crystalline water granulated slag using the apparatus of the present invention.
1 shows the results of a sampling test after dehydration treatment, and the dehydrated oil moisture % was on average 7/7, but as mentioned above, after dehydration using this device, the moisture content decreased to an average muzzle %.

As described in detail, according to the device 4 of the present invention, the wet powder and the raw material leaking from the wet powder 4 are discharged into the suction rotor rotating within the casing by air flow supply, and a large number of slits around the rotor are discharged. The PLII-shaped suction fan plate has a PLII-shaped suction fan plate that attracts gas by the suction action on the rear surface, and releases and collects it by rotational force, making it easy to remove water from high-moisture raw materials by suction dehydration rather than heat drying. In addition, the material is abrasive, and even if it is porous, there is no risk of abrasion, rupture, or damage to the suction fan plate, and continuous operation for long periods of time is possible. Gas and moisture sucked into 1d M
The water is separated by a pressure difference, and while the water is recovered, the gas is reused for the air flow supply of high-moisture raw materials through a separator, so there is no environmental deterioration due to the scattering of fine powder or water, resulting in energy savings and environmental protection. It is possible to provide an effective, simple and economical dewatering device. In addition, the track record of water removal from granulated slag treated with this equipment is as shown in Figure S, with a high dehydration effect, durability, environmental protection, and low power consumption.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the configuration of the device of the present invention, Fig. 2 is an explanatory view showing an embodiment in which a wood device fire is applied to a dehydration device for granulated blast furnace slag, and Fig. 3 is a suction fan plate in the device of the present invention. FIG. 9 is a partial perspective view of the suction fan plate, and FIG. It is a graph. (1)...Airflow supply pipe, (1a)...Fan, (lb)
・・Raw material input chute, (21・・Suction rotor,
(2a)...Suction fan plate, (2b)...Slit, (31...Casing, (3a)...Low moisture raw material recovery chute, (4)...Exhaust casing, (4a)
・・Top of exhaust casing, (5)・・Main suction duct, (
5a)... Sub suction hole, (6)... Separator, (7), (8
)...damper.

Claims (1)

[Claims] 1. A fan is installed in the middle of the system for the purpose of dehydration by the synergistic effect of the suction force of the suction rotor (2) and the suction force of the fan (1a), and high moisture raw materials such as wet powder and granules are connected to it. A suction rotor (2) configured in a conical shape with a suction fan plate (2a) having abrasion resistance and having many perforations in the radial direction around the periphery. ) and suction rotor (2).
In addition to providing a casing (3) and an exhaust casing (4) that enclose the front and rear surfaces of the suction fan plate (2a),
The upper part (4a) of the exhaust casing and the suction port of the fan (1a) are connected by the main suction duct (5) through a sub-suction hole (5a) with a separator (6) and a damper (8) in the middle. A low moisture material recovery chute (
3a), and a dehydration system for abrasive wet powder and wet granules comprising a dehydration system provided with a water recovery chute (4b) with a damper (7) at the bottom of the exhaust casing (4).