36results about How to "Flexible heating" patented technology

The invention discloses a heating system for a centralized lubrication pipeline and a usage method. The system comprises a terminal strip, electric heating nets, return lines, connecting rings, external heating wires, a temperature control switch, a contactor, a timer, a heating power supply and a circuit breaker, wherein the electric heating nets of all oil pipelines are connected in series sequentially through the terminal strip; the electric heating nets are arranged inside the oil pipelines; the return lines are parallel with and insulated from the electric heating nets; the connecting rings are arranged at two ends of each oil pipeline; the temperature control switch is used for controlling connection of the power supply; the contactor is controlled to be connected with the power supply; the timer is responsible for setting of cycles and time; and the circuit breaker plays a role in protection. The electric heating nets, with which the pipelines are sleeved, are electrically connected in series, and the power supply is switched on under the control of the temperature control switch so as to heat the whole pipeline. The method is even and synchronous in pipeline heating effect, one power supply can drive heating of all the branch pipelines, the heating efficiency is high, and the cost is low; and the heating power supply can be adjusted according to specific conditions of the pipelines after laying, so that the method can meet requirements under different conditions more flexibly as well as meet requirements of pipeline transformation in the future.

The invention discloses a technology for extracting iron from steel-making and ironmaking fly ash by micro-wave heating. The technology comprises procedures of evenly distributing the fly ash into mobile bed of a microwave reduction furnace, heating and cooling the fly ash; the heating procedure is orderly divided into a baking temperature zone, a preheating temperature zone, a baking temperature zone and a sintering temperature zone; the temperature is gradually improved to heat; the temperature of the baking temperature zone is 80-120 DEG C; the temperature of the preheating temperature zone is 200-600 DEG C; the temperature of the baking temperature zone is 700-1100 DEG C; the temperature of the sintering temperature zone is 1300-1550 DEG C; and the delivery speed of the mobile bed is controlled at 0.8-1.2m / m. The microwave belongs a body heating mode, is fast to heat, even to heat, and low in energy consumption; the fly ash contains carbon; the reducing agents such as carbon do not need to be added; and ferric oxide can be directly restored, so as to play the roles of saving energy sources and reducing the production cost. The microwave is a clean energy source, does not generate any pollution, and benefits for environmental protection.