Chemical cleaning of furnaces, heaters and boilers during their operation
The present invention comprises a waterless mixture which includes a biuret and/or urea, silica, and melamine particles coated with a layer of magnetite iron oxide for cleaning furnaces, heaters or boilers. A typical cleaning mixture comprises 30-50 percent silica, 20-50 percent biuret and/or urea, 20-40 percent melamine and 1-5 percent iron oxide. The cleaning can be performed at any time. This may lead to a reduction in fuel consumption, less air pollution, increased throughputs, and avoidance of equipment damage.
1. A waterless mixture for cleaning deposits in furnaces, heaters, or boilers, said mixture comprises:
biuret and/or urea;
silica; and
melamine particles coated with layer of magnetite iron oxide, wherein the mixture does not contain water.
2. A mixture according to claim 1 , wherein the melamine has a particle size of 0.8-2.5 min.
3. A mixture according to claim 1 , wherein the melamine has a particle size of 1.8-3.4 mm.
4. A mixture according to claim 3 , wherein the thickness of magnetite iron oxide coating, is 10-100 microns.
5. A mixture according to claim 3 , wherein the thickness of iron oxide coating is up to 80 microns.