Patented special cleaning
by dry ice

Application of dry ice to the product inside the tank for cooling / curing of the products

High­ly vis­cous pro­duct resi­du­als in the tank, which can­not be dis­sol­ved by rin­sing pro­ces­ses, are coo­led by use of dry ice in a way they har­den, thus beco­ming solid, and can then easi­ly be dischar­ged from the tank by skid loa­ders and/or a band con­vey­ors. To free­ze the pro­duct, pads or bags fil­led with dry ice are appli­ed to the pro­duct. An embedded tube in the dry ice, ser­ves to degas occur­ring CO2. The bags used are not com­ple­te­ly tight, so CO2 can escape through the hose and through the ope­nings in the bags.

Out­gas­sing CO² is pro­fes­sio­nal­ly degas­sed and dis­po­sed via hoses and a com­bus­ti­on cham­ber of our part­ner com­pa­ny SIS. The posi­ti­on of the hose or the suc­tion ope­ning is always adjus­ted to the requi­re­ments accor­ding to the pro­gress of the work or the dry ice appli­ca­ti­on instal­led. ATEX air blo­wers can addi­tio­nal­ly sup­port ven­ti­la­ting the tank.

Dry ice blasting - cleaning of contaminated internals and tank interior.

Dry ice blas­ting is a com­ple­te­ly dry pro­cess. Dry ice blas­ting is non-toxic, non-elec­tric and non-abra­si­ve. When dry ice hits a sur­face, it eva­po­ra­tes instant­ly, offe­ring seve­ral advan­ta­ges com­pared to con­ven­tio­nal blas­ting methods. Dry ice blas­ting lea­ves no resi­dues as e.g., sand, glass or pla­s­tic gra­nu­les. Thus, no abra­si­ve will accu­mu­la­te in cor­ners or inac­ces­si­ble are­as. Only the remo­ved lay­er must be dis­po­sed of after­wards, and in the case of tank clea­ning, the cor­re­spon­din­gly coo­led pro­duct. Dry ice chan­ges from solid to gas­eous sta­te when it hits a sur­face, so it gene­ral­ly does not boun­ce off. The depo­si­ted lay­ers are blown away by air blast.

Dry ice (cry­o­pel­lets) is sup­pli­ed in insu­la­ted con­tai­ners with a typi­cal capa­ci­ty of 400 kilo­grams. The con­tai­ners can be moved by for­k­lift or pal­let truck to the places of instal­la­ti­on. The shelf life of cry­o­pel­lets in the­se con­tai­ners is sta­ted to be four to eight days, depen­ding on ambi­ent tem­pe­ra­tu­re and con­tai­ner qua­li­ty. A shrin­kage (sub­li­ma­ti­on) of the con­tai­ner con­tents of approx. 4% per 24 hours is to be expected.