Dedusting system of whole factory building

Abstract

The invention discloses a dedusting system of a whole factory building, which comprises an air funnel, an air handling unit, a top air-return opening, an air supply pipeline and an air-return pipeline, wherein the air handling unit is arranged outside a workshop, the air funnel is arranged at the lower part of the inner side of the workshop, one end of the air supply pipeline is connected with the air funnel, and the other end of the air supply pipeline is connected with the air handling unit through the air supply pipeline; the top air-return opening is arranged at the top inside the workshop, one end of the air-return pipeline is connected with the top air-return opening and the other end of the air-return pipeline is connected with the air handling unit. The air supply direction of the air funnel is adjusted to change the air distribution of returned air, welding fume with higher temperature drifts upwards under the action of hot buoyancy, the fume further drifts upwards by the push of air sent out from the air funnel and does not move transversely, thereby the welding fume can be avoided from passing through the respiratory zone of the human body; and the fume and harmful gases are sucked into the air handling unit through the air-return pipeline under the suction action of the air-return opening at the top of the workshop and can not be directly removed outdoors, thereby the secondary pollution can not be caused.

Description

Technical field: [0001] The invention relates to the technical field of internal environment treatment for environmental protection, in particular to a dust removal system for dust removal and purification treatment of smoke and dust in an overall factory building. Background technique: [0002] Welding is a common method of mechanical processing. There are more than 20 elements found in the fume and dust in welding fume. If workers work in the environment of welding fume and dust, without proper protection measures, it will lead to various occupational diseases and cause Pulmonary edema, bronchitis, acute asthma, neurasthenia and chronic respiratory inflammation. For this reason, the country has a strict limit on the concentration standard of pollutants in the working environment, and the standard GBZ2-2002 stipulates that the comprehensive dust concentration of the workshop is ≤6mg / m 3 . Welding fume control is a worldwide technical problem, and its difficulties are as f...

AI Technical Summary

Problems solved by technology

At the same time, there is a heating workshop in winter. While removing smoke and dust, it also removes the heat of the workshop, resulting in a great waste of energy.

Moreover, this straight-line method only transfers the dust from the workshop to the outside of the workshop, and does not control the dust, which results in secondary pollution to the environment.

[0006] The second overall treatment method is to adopt the blowing and suction method, that is, set the blower outlet at a height of about 5 meters on one side of the workshop, and use jet flow to supply air, which has a large air volume and high air supply speed, and install it at a height of about 3 meters on the other side of the workshop. Return air outlet, the airflow blown out from the blower outlet takes away the welding fume and is discharged to the outside by the return air outlet. This method makes the welding fume move along the direction of the airflow to the direction of the return air outlet. It cannot effectively prevent the welding fume from passing through the breathing zone of the human body, and workers will still inhale it. welding fume

[0007] The third method of overall treatment is to use mixed air supply to remove welding fume, which has a large air volume and high wind speed, which is good for CO 2 For gas shielded welding, when the wind speed around the shielding gas exceeds 1m / s, the shielding gas will be blown away, thus affecting the welding quality

High energy consumption

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