| 摘要 |
The invention relates to a method and equipment for producing foam bitumen. Water is mixed to hot bitumen under a pressure which is lower than the prevailing absolute pressure, and after this the pressure is allowed to rise and the flow rate to drop. The mixing of water and bitumen occurs in a foaming reactor (17), which is connected via a pipel ine (6, 8, 9, 10) to a spray bar (1), which also acts as a heat exchanger, and the changes in the flow caused by an inclination in the spray bar are compensated by means of pipes (6) and valves (7 ). The entire equipments is thermally insulated, and a part of it may be provid ed with electric heating to prevent the bitumen from sol idifying. It is possible to circulate hot bitumen in the equipment by opening a valve (12), whereby the entire equipment is brought to an oper ating temperature.
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