JP4326466B2 - Dust removal equipment - Google Patents

Description

  The present invention relates to an apparatus for removing dust generated at a processing site for processing earth and sand, building waste, and the like.

  In a processing site for processing earth and sand and building waste, raw materials such as earth and sand and building waste that have been transferred are put into a hopper and transferred to a predetermined place by a conveyor for processing. Since these raw materials contain fine particles, a large amount of dust is generated when the raw materials are put into the hopper, which deteriorates the working environment and visibility. It was.

  In order to suppress the generation of this type of dust, countermeasures exemplified in Patent Documents 1 to 4 have been proposed.

JP-A-8-131745 JP-A-11-72291 Japanese Patent Laid-Open No. 2003-126797 JP 2003-336827 A

  The technology described in these patent documents is a method of adsorbing dust by spraying water or a highly viscous liquid. Among these, the method disclosed in Patent Document 1 sprays a small amount of water on the exhausted air containing dust, causes the dust to adhere and fall, and on the surface of the soft synthetic resin sheet wetted with the spray water, This is a method in which dust not sprayed with water and sprayed water are attached, and the attached dust is allowed to flow down along with water droplets growing on the sheet surface. Moreover, the method currently disclosed by patent document 2 is a method of collecting dust by spraying mist to the dust generated at the time of crushing a sintered ore. Furthermore, the method disclosed in Patent Document 3 is a method of spraying a high-viscosity slurry when unloading a dust product from a dump truck bed. Further, the method disclosed in Patent Document 4 is a method of spraying water by providing a spray nozzle above the sintering furnace at the time of removing the clinker attached to the furnace wall of the sintering furnace.

  However, the methods described in Patent Documents 1 to 4 are not suitable for use in a process in which raw materials that generate dust are put into a hopper, conveyed by a conveyor, and processed. That is, when adsorbing a large amount of dust generated when introducing raw materials such as building waste into the hopper by spraying water, the water particle size should be as fine as several microns to increase the adsorption efficiency. However, if such fine spraying is performed, there is a problem that particles adsorbed with dust drift in the air and deteriorate the visibility. In order to prevent this, if the amount of water is increased, the dust becomes a slurry and adheres to the conveyor, which is not preferable.

  Then, this invention makes it a subject to provide the dust removal apparatus suitable for employ | adopting at the process which throws the raw material which generate | occur | produces dust into a hopper, and conveys it to a predetermined place with a conveyor.

  In order to solve the above problems, the present invention employs the following configuration. That is, the dust removing device according to the present invention is a dust removing device attached to a processing device including a hopper for feeding raw materials such as building waste and a conveyor for conveying the raw materials fed from the hopper to a predetermined position. A tunnel-like cover that provides a spraying device for spraying a fine liquid at the opening of the hopper and covers and seals the outer periphery of the conveyor to a predetermined position on the downstream side of the conveyor travel distance away from the hopper And a dust collecting device for sucking and removing dust and liquid particles flowing through the cover. As the liquid to be sprayed, it is economical and preferable to use water. Further, the particle size is preferably several microns to several tens of microns, and more preferably around 5 microns, as a result of experiments.

  In this dust removing device, the liquid is sprayed at the position of the hopper where a large amount of dust is generated, and the mist adsorbing the dust at a place away from the hopper in the conveying path of the conveyor is sucked and removed by the dust collecting device. Since the conveyor is covered with a tunnel-shaped cover and sealed from the outside air up to the suction location, the mist that has adsorbed the dust is sucked into the cover at the hopper position by the suction force of the dust collecting device, Almost no leakage. For this reason, it is effectively prevented that the working environment deteriorates or the field of view of the work place deteriorates.

  Embodiments of the present invention will be specifically described below. The figure illustrates an embodiment of the present invention, and a hopper 2 is provided at the start end of the conveyor 1. Raw materials such as building waste and earth and sand are fed into the hopper 2 from the receiving conveyor 4. The conveyor 1 is a belt conveyor, and an apparatus (for example, a sorter, a chute, a hopper, another conveyor, etc.) 5 for processing the conveyed raw material is provided at the end portion of the conveyor 1.

  Above the opening of the hopper 2, a spray nozzle 11 of the spray device 10 is provided. The spray nozzle 11 is supplied with water pressurized by a pump unit 13 from a separate water storage tank 12 and sprayed downward. The most effective mist particles to be sprayed are about 5 microns.

  A cover (hood) 15 for sealing the conveyor is provided in a tunnel shape from the start end to the end of the conveyor 1. The start end of the cover 15 is connected to the outer wall of the hopper so that air does not leak. The cover 15 may be made of a material having a certain degree of strength and airtightness, for example, a cloth, a synthetic resin plate, a metal plate, wood, or the like.

  A dust collector 20 is provided at the end of the cover 15. As this dust collector 20, a known dust collector that can reliably separate and remove dust adsorbed by mist, such as a bag filter type dust collector, can be used.

  In the case where the opening of the hopper 2 is wide, a strong suction device is required to suck the entire opening if the portion to collect dust is in the vicinity of the hopper 2. In this case, since the water particles are collected before adsorbing the dust, the efficiency is deteriorated. For this reason, in the present invention, the conveyor connected to the hopper is covered with a tunnel-like cover to form a sealed shape, and dust is collected at a place away from the hopper. In addition, you may make it collect dust in multiple places along a conveyor.

  When using the dust treatment apparatus, fine water particles (mist) are sprayed from the spray nozzle 10 toward the opening of the hopper 2 and the dust collector 20 provided on the downstream side in the transport direction of the conveyor 1 is operated. The air in the cover 15 is sucked. In this state, raw materials such as building waste are put into the hopper 2. A large amount of dust is generated from the raw material put into the hopper 2, and this dust is adsorbed by the mist, and in the tunnel-like cover 15 covering the conveyor 1 by the suction force of the dust collector 20 together with water particles. Inhaled. For this reason, there is no possibility that a large amount of dust leaks outside at the position of the hopper 2.

  The dust and water particles sucked into the cover 15 flow along the conveyor 1 inside the cover and are collected at the position of the dust collector 20. This prevents a large amount of dust from leaking to the outside even at the end portion of the conveyor 1.

  This dust treatment apparatus sucks air containing dust by spraying a spray device that sprays fine water particles on the opening of the hopper 2, a tunnel-type cover 15 that covers the outer periphery of the conveyor 1 that conveys the raw material, and It is constituted by a dust collecting device 20 for separating and removing dust, and is relatively simple in structure, can be reduced in equipment cost, and can be robust and rich in durability.

  As is apparent from the above description, the dust treatment apparatus according to the present invention is suitable for use in a process of conveying raw materials that are likely to generate dust by a conveyor, and is used for dust suppression in a building waste treatment plant or the like. It is particularly effective. In addition, it cannot be overemphasized that this apparatus can be used in the other field and process which handle raw materials other than construction waste materials.

It is a front view of a dust treatment device. FIG. It is the left view. It is the right view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor 2 Hopper 10 Spraying device 15 Cover 20 Dust collector

Claims (2)

A dust removing device attached to a processing apparatus provided with a hopper for charging raw materials such as building waste and a conveyor for conveying the raw materials charged from the hopper to a predetermined position, wherein a fine particle is formed in the opening of the hopper. A spray device for spraying liquid is provided, and a tunnel-shaped cover is provided to cover and seal the outer periphery of the conveyor up to a predetermined position downstream of the conveyor travel distance away from the hopper, and dust that circulates in the cover And a dust collecting device for sucking and removing liquid particles. The dust removing apparatus according to claim 1, wherein the liquid to be sprayed is water, and the spray particle size is several microns to several tens of microns.

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