JPS625259B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is designed to prevent harmful substances from spreading into the factory when moving substances that generate dust, harmful gas, hot air, etc. using a crane in the factory. This invention relates to a device for effectively discharging outdoors.

In various factories such as chemical factories and smelters,
When using a crane to move an object or device that generates harmful gases, hot air, bad odors, dust, etc. (in this specification, these are collectively referred to as harmful substances), if the object or equipment is large, most of the exhaust gas will be removed. The reality is that no countermeasures have been taken. For example, when molten metal or slag is placed in a ladle at a smelter and moved by a crane, the hot air, gas, or splash that is being moved spreads or scatters around, but there are no effective methods to prevent this. The reality is that no countermeasures can be taken, and forced exhaust through ducts is difficult to achieve for moving sources.

The present invention has developed a device that effectively exhausts air even when the source of harmful substances is moved. A device for discharging harmful substances from the air to the outdoors, the hood covering the upper part of the source of the harmful substances suspended on a crane;
an in-hood exhaust blow-off unit installed in the hood with the suction port facing the inside of the hood and the blow-off port facing the space above the hood;
This system consists of an axial blower installed in the ceiling space with the inlet and outlet facing horizontally for airflow control, and an outdoor exhaust ventilation fan attached to the ceiling to move exhaust gas containing harmful substances. To provide a ductless factory exhaust system that transports airflow from an indoor source to the outdoors.

The apparatus of the present invention will be specifically explained according to the embodiments shown in the drawings. In FIG. 1, numeral 1 indicates a source of harmful substances. For convenience of explanation, the space in the factory is divided into a working area A, an intermediate area B, and a ceiling airflow control area C, as shown in the figure, from the bottom. The hazardous substance generation source 1 suspended by the crane 2 moves in arbitrary directions vertically and horizontally in the working area A and the intermediate area B.

In the apparatus of the present invention, first, a hood 3 is attached to the upper part of a harmful substance generation source 1 suspended by a crane 2, and an in-hood exhaust blowing unit 5 inside an axial flow blower 4 is attached to this hood 3. In the ceiling airflow control area C, an airflow control blowout unit 7 incorporating an axial blower 6 is installed with its suction port and blowout port oriented in the horizontal direction.

The hood 3 is attached to the middle of the wire 8 on which the crane 2 suspends the hazardous substance generation source 1, and therefore the source 1 and the hood 3 move as the wire 8 moves while maintaining a constant relative position. This food 3 is
The hood 3 is large enough to cover the source 1 of harmful substances, and a wire 8 is connected to the source 1 with a predetermined gap so that the surrounding air near the source 1 is also drawn into the hood 3. It is fixed at This food 3
A necessary number of in-hood exhaust blowing units 5 are attached to the hood 3 according to its size.

This in-hood exhaust blow-off unit 5 has a simple structure in which an axial blower 4 is mounted in a cylinder with both ends open, and the blow-off side end has a tapered nozzle opening so as to obtain a jet flow. Therefore, the gas drawn into this unit 5 from one opening end (suction port) by the drive of this axial blower 4 is ejected as a jet from the other opening end (outlet port), and the reaching distance is A long jet stream is formed. This exhaust blow-off unit 5 is fixed to the hood 3 with its suction port facing inside the hood 3 and its blow-out port facing outside the hood 5 (vertically upward). . As a result, harmful gases, dust, hot air, etc. that are collected in this hood 3 from the harmful substance generation source 1 are drawn into the exhaust blowing unit 5 together with the surrounding air drawn into the hood 3, and the exhaust blowing These harmful gases, dust,
A jet flow entrained with hot air etc. is ejected vertically upward and rises to the ceiling airflow control area C. That is, these harmful substances are carried to the ceiling airflow control area C along with this jet flow.

The ceiling airflow control area C is a cylinder with openings at both ends in order to control the airflow on the ceiling surface which is substantially wider than the two-dimensional area of the crane traveling distance (in the direction parallel and perpendicular to the plane of the paper in Figure 1). A necessary number of airflow control blow-off units 7 equipped with axial blowers 6 are fixedly installed with their suction ports and blow-off ports facing horizontally. This airflow control blow-off unit 7, like the exhaust blow-off unit 5, has its blow-out side opening end narrower than its suction end, so that a jet flow with a longer reach can be obtained. The illustrated embodiment shows an example in which an exhaust ridge 10 exists within the travel area of the crane 2, and in such a case, an airflow control outlet is installed so that the airflow is concentrated in the direction of the exhaust ridge 10. Place unit 7. That is, the airflow control blow-off unit 7 is arranged in the ceiling space so that a unidirectional airflow flows in the direction of the exhaust ridge 10 from any planar position within the travel area of the crane 8. Even if the exhaust ridge 10 is located outside the travel area of the crane 8, the unit 7 can be arranged so that airflow can flow to the exhaust ridge 10 from any planar position within the travel area.

When the vertical upward flow from the moving or stationary exhaust blowing unit 5 reaches the ceiling airflow control area C formed in this way, harmful substances are carried horizontally by riding on this horizontal ceiling airflow. The air is discharged outdoors along with the induced flow of the ventilation fan 11 of the exhaust ridge 10. Although the ventilation fan 11 is shown in the illustrated example, when considering the prevention of air pollution, the ventilation fan 11
shall be a duct exhaust device that can function as a device for forcibly supplying air to a dust collector or various filters.

On the other hand, in the work area A, supply air (uncontaminated air) is blown toward the worker's living area from the air supply outlet 12 provided near the worker's living space. In order to ensure that this supply air flows properly toward the worker's living area (that is, to prevent mixing with the surrounding air and dispersion of the supply air to the surroundings as much as possible), 7, the supply airflow can also be controlled using a blow-off unit (not shown) inside the axial blower.

In this way, the present invention makes it possible to discharge harmful substances from the source to the outside of the building without using ducts while preventing them from dispersing indoors, even if the source moves within the factory. This has a significant effect on improving the working environment. Furthermore, since the supply airflow and the exhaust airflow can be separated, the required ventilation amount can be greatly reduced compared to ventilation using a conventional ventilation fan.

[Brief explanation of the drawing]

FIG. 1 is an overall diagram of the equipment layout showing an embodiment of the apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Harmful substance generation source, 2... Crane, 3... Hood, 4... Exhaust blow-off unit in hood, 5, 6... Axial flow blower, 7... Air flow control blow-off unit, 11...
Ventilation fan.

Claims (1)

[Claims] 1 A device that discharges hazardous substances outdoors while moving the source of hazardous substances within a building using a crane, which includes a hood that covers the top of the source of hazardous substances suspended on the crane, and a suction The in-hood exhaust blow-off unit inside the axial blower is attached to the hood with the mouth facing inside the hood and the air outlet facing the space above the hood, and the inlet and air outlet facing horizontally into the ceiling space. It consists of an airflow control blowout unit installed inside the axial blower, and an outdoor exhaust ventilation fan installed on the ceiling.
A ductless factory exhaust system that transports exhaust gas containing harmful substances from a moving source to the outdoors.