JPS60212205A - Wet dust removing apparatus - Google Patents

Abstract

PURPOSE:To contrive to reduce operation cost, in a wet dust collection apparatus, by providing a water sprinkling dust collection tower for separating dust from air, water tanks used in sprinkling and recirculating water and a sewage separator for separating dust from water by centrifugal separation. CONSTITUTION:A dust-containing air stream air stream enters from an air intake port 1 and the dust in the air stream is collected by washing water, which is supplied from a water distributor 5 and scattered by a rotating metal net rotor 4, and collected in the water tank 3 under a dust collection tower as dust water while air is exhausted from an exhaust port 22. The dust water enters a sewage separator and centrifugally separated into dust and water by a rotary basket 10 while water is discharged to the water tank 13 from a water receiving tank 11 by a fall and positively foamed to adsorb fine dust by foam. The foam enters a dust accumulation chamber 25 through a chute 19 and washing water is supplied to the water distributor through a water feed pipe 15 by a recirculation pump 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for removing dust from the air.

Regarding the treatment of dust such as rice husks generated in grain processing plants, etc., there are two main methods: dry treatment using conventional cyclones, bag filters, etc., and wet treatment.

In the case of wet processing, grain dust is difficult to mix, buoyant, or coarse, so a chamber is installed to reduce the wind speed, allowing the coarse dust to settle in the dust chamber, and then settling. Two-way dry/wet treatment is becoming popular, in which treated dust-containing air is guided from a dust chamber to a wet treatment chamber and filtered using washing water. The generally popular method is a single-type countercurrent scrubber, in which water is forced into equipment, where water droplets are made finer to improve the dust removal effect.The fine water droplets ride on the airflow and are exhausted to the outside, causing secondary pollution. This has resulted in an invitation.

Although an eliminator or the like is installed to separate water droplets from the discharged air, the fixed type causes clogging and results in a large loss of wind pressure, which is insufficient.

In addition, although washing water is generally used repeatedly, it requires a large water tank. A problem with the conventional system is that the dry dust that has settled in the dust chamber is often re-dispersed during removal and transport operations, causing secondary pollution. Furthermore, since a large amount of washing water is required, the water tank becomes large, and auxiliary equipment is required to remove the settled sludge, making the entire device large and requiring a large-capacity pump, which increases the power required.

In addition, there may be problems with the treatment of large amounts of suspended sewage and bad odors.

In order to eliminate these drawbacks, the present invention (1) eliminates the dry processing section (secondary settling chamber) and performs a batch wet processing to prevent dust from scattering again.

(2) The dust removal device has little pressure loss, effectively utilizes the exhaust energy exhausted from the facility, and does not require an auxiliary blower.

(3) It is a consummate device that can process dust according to its properties, and can be arranged in three dimensions to reduce the amount of space on the ground.

(4) Washing water is recycled and used repeatedly, but the water tank is made smaller, the amount of circulating water is reduced, the dilution effect of make-up water is increased, and the agitation type water tank is used to eliminate sludge sedimentation.

(2) The aim is to reduce the power required for processing and reduce operating costs through (4). To explain the diagram, Figure 1 shows a dust collection tower, which is a type of cyclone scrubber and has a cylindrical shape. Outer cylinder with air intake (1) at the connection (
2), a wire mesh rotor (4) that rotates on its own axis using a dust-containing airflow with a velocity component, a lower water tank (3), and an exhaust port (a). The effect is that the dust-containing air pushed in from the cylinder connection direction becomes a swirling airflow along the inner circumference mG of the cylinder, but the dust-containing air is complicatedly distributed into a centrifugal airflow toward the outer circumference and an inward airflow toward the center.

A wire mesh rotor (4) that rotates due to the velocity component of the dust-containing airflow is placed in this area, and washing water is made to flow down from a water separator (5) above the rotor. The cleaning water becomes scattered water due to the rotation of the wire mesh rotor, and the relative movement distance of the water droplets to the gas becomes longer due to the influence of the swirling air current, and the direction of movement of the gas and water droplets becomes cross flow or parallel flow, increasing gas-liquid contact. do. The dust, which increases in mass when it comes into contact with water droplets, reaches the settling point and falls or is collected by contacting the liquid film on the circumferential wall along the centrifugal air current, becoming raw water and being collected in the water tank (3) at the bottom of the dust collection tower. collected. The air that has become an inward flow inside the cylinder comes into contact with the leaking surface of the rotating wire mesh rotor, is further filtered, forms a forced vortex along the inner surface of the wire mesh rotor, and collides with the exhaust pipe floor surface (2). At this time, the air is released through the exhaust port, leaving behind the cleaning water and fine dust. Furthermore, since the cleaning water flows in the form of a liquid film on the exhaust pipe floor surface (A), the dust that tries to adhere to the wire mesh rotor, which has a further collection effect, is removed by the cleaning water flowing from above and from the side. Figure 2 shows a sewage separator, and its configuration is such that the dust-containing water sent from the lower water tank is transferred to the seat body and the water separator. A rotary basket that is continuously separated into (10) and a water receiving tank (b) that receives the washing water that has passed through the nozzle 7), and a seat body that continuously discharges the water from above the nookuseke and g. It consists of a separator outer cylinder (9) that prevents the particles from scattering. Since the action is a centrifugal dehydration method, the seat body to be discharged is tightly squeezed and deposited in the dust collection chamber (a), so there is no quadratic number of dust during removal Φ transport. Since the fine dust contained in the dust-containing water is dehydrated instantaneously, the coarse dust becomes 11ai and is removed.

Figure 4 shows the water tank (b), where the washing water discharged from the sewage separator is directed into the tank, discharged into the tank space by the head, and actively foamed and suspended in the tank. Allows fine dust to be adsorbed to the foam surface. When the foam develops, it passes through the tank space (through the sheet) and enters the dust collection chamber. The cleaning water in the tank is supplied by the circulation pump (b) through the water pipe (b) to the water divider (5) at the top of the dust collection tower, but some of it is passed through the bypass pipe (b).
The sludge is returned to the water tank (b) by adjusting the control valve (b) located in the middle of g), thereby preventing sludge sedimentation and promoting foaming.

The advantages of this device are (1) A compact device C that can process according to the properties of dust without the need for a dry processing section (dust collection chamber), and can be arranged in three dimensions, requiring less ground space. (2) The dust collection tower There is little pressure loss, and there is little influence from each part of the machine.In the cyclone scrubber, the ranking vortex causes water droplet contact with dust to become a cross flow, resulting in a high gas-liquid contact effect.

(3) The dust is processed in a complex manner by the filter effect of the rotating wire mesh rotor inside the dust collection tower.

The emitted exhaust gas crosses the wire mesh rotor and the exhaust pipe at right angles and collides with each other, so there is no entrainment of water droplets.

(4) The raw water is continuously passed through a separator to provide solid-liquid and external H,
(hard drawing shape) and accumulates the entire amount in one place, removing and
Work can be done hygienically without secondary scattering during transport.

(5) Washing water is used repeatedly by circulation, but since it is a small amount of water, the dilution effect with make-up water is large, and there is no sedimentation of sludge etc. in the agitating water tank.

(6) Cleaning water is a running water splash type, no nozzle is used, and maintenance is (0341).

(7) Uses materials with excellent corrosion resistance and has a simple structure.
It is easy to maintain and manage and can withstand many years of use.

(8) It has many advantages such as less power required for treatment and lower operating costs.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view of a dust collection tower. FIG. 2 is a perspective view of sewage separation. Figure 6 is a diagram of the overall mechanism. FIG. 4 is a plan view of the aquarium mechanism. (1) Air intake (2) Cylindrical inner wall (3) Lower water tank
(4) Wire mesh rotor (5) Water divider (6) Water tank (7
) Discharge port (8) Water pipe (9) Separator outer cylinder (10)
Rotating basket (b) Water tank (b) Water pipe (
B) Water tank (B) Circulation pump To) Water pipe (G) Bypass pipe α control valve (G) Guide plate (B) C, -T
(a) Water supply device (a) Exhaust port) Floor surface (
E) Drain pipe (E) Dust collection room A: Dust-containing air B: Clean air Patent applicant Kuken Kiko Co., Ltd. Patent applicant Ei 1) Yu Tsuchi

Claims (1)

[Claims] (a) A dust collection device in which a rotating wire mesh rotor (4) is disposed inside the outer cylinder (2) as a device for separating dust and air, and water is sprinkled from an upper water divider (5). Tower. (b) A water tank that receives filtered water as a water tank, is used for watering from the top of the dust collection tower by a pump attached to the bottom of the tank, and is used partly as circulating water within the tank. (c) A sewage separator that separates dust and water using a centrifugal dehydration method, in which a rotating basket (10) with a V-shaped cross section is disposed inside an outer cylinder (9) as a separating device. A wet dust removal device consisting of (a), (b), and (c)