JPS6262263B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to various gases and
This invention relates to a system that can effectively discharge dust, particularly harmful gases and dust, to the outdoors regardless of whether a crane is traveling.

[Conventional technology]

Harmful gases such as organic solvents and fumes generated inside factory buildings are captured in hoods using local exhaust systems and are discharged outdoors via hoses and ducts. However, in the center of a large factory or special workshop, it is difficult to arrange hoses due to equipment constraints, as this poses obstacles to the movement of cranes, the arrangement of machinery, and the passage of designated passageways. Yes, and installing ducts is practically impossible.

For this reason, we are still working hard to take countermeasures against welding fumes in welding workshops in the shipbuilding industry, organic solvent gas from painting large machines in large machinery factories, and dust from sand removal work in foundries, but we have not yet taken any drastic environmental measures. The current situation is that no improvement measures have been taken. Furthermore, with regard to specified chemical substances such as asbestos and lead, the installation of dust removal equipment and outdoor exhaust are required under the Specified Chemical Substance Poisoning Prevention Regulations and the Lead Poisoning Prevention Regulations. In this case as well, if the source of contamination is located in the center of the factory, which is far from the side walls of the factory building, the current situation is that installing hoses and ducts is similarly very difficult or almost impossible.

JP-A No. 57-95258 describes a device for exhausting such harmful substances without a duct, which forcibly circulates the harmful substances generated by an exhaust blow-off unit and an airflow control blow-off unit to an outdoor exhaust ventilation fan. has been done. This exhaust blowing unit is mounted on a crane and is capable of capturing harmful substances discharged when the source of harmful substances is moved.

[Problem that the invention seeks to solve]

However, in order to forcefully circulate the generated harmful substances by suction, it is necessary to increase the capacity of the suction fan. Furthermore, since a large amount of air is involved in the circulation of harmful substances, the flow rate of exhaust gas discharged outdoors increases, and the equipment required to treat this exhaust gas becomes large-scale.

Therefore, an object of the present invention is to efficiently capture generated harmful substances and exhaust them outdoors without increasing the capacity of the suction fan.

[Means for solving problems]

In order to achieve the purpose, the outdoor exhaust system of the present invention provides an exhaust device in the upper part of the building that is equipped with an updraft guide tube whose lower end opening direction can be adjusted, and the lower end of the updraft guide tube. A forced suction blowing device equipped with a high-speed fluid spout at the top facing the opening is installed at the bottom of the building, and a blower and a blower are installed at the bottom of the building to suck in harmful gases and/or dust-containing gases generated inside the building. The invention is characterized in that the forced suction blowing device is provided with a heater that heats the gas.

Here, as the forced suction blowing device, one equipped with a cart that can run on the floor inside the building is used. Further, it is preferable that the direction of the high-speed fluid jet port of the forced suction/blowout device is adjustable toward the updraft guide tube of the exhaust device.

〔Example〕

Hereinafter, the features of the present invention will be specifically explained using examples with reference to the drawings.

FIG. 1 is a front sectional view of a building equipped with the outdoor exhaust system of the present invention, and FIG. 2 is a side sectional view thereof.

In the building 3, an exhaust device 1 is arranged on the ceiling, and a forced suction blowing device 2 is arranged on the floor.
This exhaust system 1 includes an updraft guide tube 11 incorporating a rooftop ventilation fan 10. The updraft guide cylinder 11 has a cylinder wall that expands and contracts in a bellows style, and the cylinder wall is expanded and contracted by the guide cylinder operating mechanism 12 to direct the direction of the lower end opening to the forced suction blowout arranged on the floor. It can be adjusted towards the high velocity fluid jets 25 of the device 2 .

FIG. 3 shows a forced suction blowing device. This forced suction blowing device 2 has a blowing tower main body 22 having a suction port 21 at the bottom mounted on a cart 20 which is movable on the floor and whose direction can be adjusted. and,
The inside of the blowing tower main body 22 is partitioned by a partition plate 23 to form a blowing chamber 24. A high-speed fluid jet port 25 is attached to the top of the blow-off chamber 24, and the gas sent by the blower 26 is sent out from the high-speed fluid jet port 25. When ejecting high-speed fluid, harmful substances in the building are removed from the suction port 2.
1 and transported from the high-speed fluid jet port 25 together with the high-speed fluid. This high-speed fluid spout 25
has a structure such as a punker louver, and can be directed toward the ascending airflow guide tube 11.

At this time, the gas sent from the blower 26 is heated by the heater 27 and is ejected from the high-speed fluid ejection port 25 as a high-temperature airflow.
Therefore, the ejected high-speed fluid flows through the blower 26.
In addition to the kinetic energy caused by this, it has an upward force due to the temperature difference with the atmosphere inside the building.
Therefore, even when the blower 26 with a relatively small capacity is used, the high-speed fluid jetted from the high-speed fluid jetting port 25 is sufficiently transmitted to the upward airflow guide tube 11.
reach. That is, the gas containing harmful substances taken in from the suction port 21 is collected in the updraft guide tube 11 without being excessively diluted by the gas sent from the atmosphere inside the building by the blower 26.

Next, the work of discharging harmful substances using this outdoor discharging system will be described.

Air containing harmful gas or fine dust generated inside the building (hereinafter referred to as exhaust gas) is removed by blower 2.
6 into the blowing tower main body 22 from the suction port 21 provided on the side. This exhaust gas is then sent to heater 27 and heated. Then, in a high temperature state, it is ejected at high speed toward the exhaust device 1 from the high-speed fluid ejection port 25 at the top stage. At this time, the exhaust device 1 makes the lower end opening surface of the updraft guide tube 11 perpendicular to the streamline of the exhaust gas ejected from the high-speed fluid jet port 25, so that the exhaust gas is effectively transferred to the updraft guide tube. 11.

The exhaust gas sent from the forced suction blowing device 2 toward the exhaust device 1 flows as a conical hot air flow S, as shown in FIGS. 1 and 2. At this time, the hot air flow S is accelerated by the rising force caused by the temperature difference with the atmosphere inside the building. Further, the outer periphery of the hot air flow S is cooled by the atmospheric air and once leaves the main body of the hot air flow S. However, due to the jet effect in the center of the hot air flow S, the hot air flow S
Go back inside. As a result, the exhaust gas discharged from the high-speed fluid jet port 25 is collected in the updraft guide tube 11 while minimizing diffusion. The exhaust gas collected in the updraft guide tube 11 is then efficiently exhausted outdoors by the rooftop ventilation fan 10.

〔Effect of the invention〕

As explained above, in the exhaust system of the present invention, harmful gases, dust, etc. generated in large machinery factories and large painting factories are exhausted outdoors using a relatively small capacity blower by exhausting them in a heated state. can be sent out. Therefore, since the exhaust gas containing harmful substances is exhausted outdoors without being excessively diluted with the transport gas, there is no need to use large-scale exhaust gas treatment equipment in the future.
Further, the forced suction blowing device itself has a simple configuration. Therefore, the exhaust gas treatment system is simplified,
It can be made extremely inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of a building having an outdoor exhaust system according to an embodiment of the present invention, and Fig. 2 is a side sectional view thereof.
FIG. 3 is a front view of the forced suction blowing device. 1: Exhaust device, 2: Forced suction blowing device, 3:
Building, 10: Rooftop ventilation fan, 11: Updraft guide tube, 12: Guide tube operation mechanism, 20: Trolley, 2
1: Suction port, 22: Blowout tower main body, 23: Partition plate, 24: Blowout chamber, 25: High speed fluid jetting port, 2
6: Blower, 27: Heater, S: Hot air flow.

Claims (1)

[Scope of Claims] 1. An exhaust device equipped with an updraft guide tube whose lower end opening can be adjusted in direction is provided in the upper part of the building, and a high-speed fluid jet is provided opposite the lower end opening of the updraft guide tube. A forced suction blow-out device with an outlet at the top is provided at the bottom of the building, and a blower that sucks gas containing harmful gas and/or dust generated inside the building and a heater that heats the sucked gas are installed at the bottom of the building. An outdoor exhaust system for harmful gases, dust, etc., characterized by being installed in a suction/blowing device. 2. An outdoor exhaust system for harmful gases, dust, etc., characterized in that the forced suction blowing device according to claim 1 is equipped with a trolley that can run on the floor inside a building. 3. An outdoor exhaust system for harmful gases, dust, etc., characterized in that the high-speed fluid jet outlet according to claim 1 can adjust its direction toward an updraft guide cylinder of an exhaust device.