Study On Ventilation Mode In Large Welding Workshop Of Shipard

Welding technology is an essential industrial technology means during the machinery processing industry , and it plays a very impotant role in the development of national economy .But smoke and dust produced by bonding technology bring damage to the working environment gravely , endanger people's health . Governing soldering smoke and dust in air is always a perplexing problem in the field of industrial ventilation and becomes the difficult point of the field because of the large-scale-rization trend of workshop building, the uncertainty of welding place, the diversity of welding way and the complicated smoke and dust's formating and irradiating mechanism etc. In fact, so far the relations between the formating and diffusing process of smoke and dust and a lot of space key elements have been not able to be grasped completely from theory or reality yet .Especially to the enormous and partly open welding workshop of the shipyard, both natural draft and mechanical ventilation can not be dependent on completely and be put into practice. Effective dust removal by ventilation is very difficult so far. At present, shipbuilding industry in our country enters a fast- developing period .In 2005 Chinese shipbuilding industry already accounts for 18% of world shipbuilding industry market. The welding technology is the key technology in the modern shipbuilding .it is introduced on the grounds of the data that a working hour takes up 30% ~ 40% of general working hour in constructing ship .So in order to improve labour health condition in shipbuilding industry and to guarantee labourer healthy, it is an important proposition to solve dust removal by ventilation of the enormous welding workshop.This article has made a great deal difficult analysis and hard research on governing soldering smoke and dust in the shipyard that is always a perplexing problem in the field of welding industry by on-the-spot investigation, surveying the document survey , experiment and CFD which combinates modern computational fluid mechanics with computer science .Especially to the open welding workshop building space in which the experiment and study are difficult to carry out ,this article has carried out comparatively systematic analysis and effect estimation on natural ventilation and assisting mechanical ventilation . This article has firstly analysed the natural ventilation performance in welding workshop of shipyard with non-constant outdoor climate condition determinately and quantitatively, estimated the ventilation effect with diversity builds condition and the way of ventilation .This article has got the achievements of the current stage on governing soldering smoke and...