The blast furnace energy recovery device of the coaxial system of the blast furnace blower and the blast furnace gas residual pressure turbine power generation device in the metallurgical industry, referred to as the BPRT (Blast Furnace Power Recovery Turbine) device, which will place the blast furnace blower and blast furnace gas residual pressure originally placed in different workshops The recovery turbine (referred to as TRT—Blast Furnace Gas Top Pressure Recovery Turbine Unit) is connected in series on the same shaft system, which solves the problem of insufficient space on site and saves a lot of space. The benefit is considerable.
The BPRT device uses the latest technology and patented technology. According to the specific situation of the user’s site, the TRT is applied to the coaxial unit and is designed as the same system as the blast furnace blower. The generator and the power generation and distribution system are eliminated, and the automatic control system is integrated to lubricate. The oil system, power oil system, etc., avoid the loss of energy conversion, increase energy recovery, ensure that the device will not affect the normal operation of the blast furnace under various working conditions, and maximize the recovery of blast furnace gas energy. This unit is mainly composed of electric motor, gear box, axial compressor, variable speed clutch and gas energy recovery turbine.
In this set of units, the blast furnace blower is designed as an independent system, the motor power is still selected according to the maximum point power of the blower, the purpose is to drive the blower to run under the maximum operating conditions regardless of the circumstances, without affecting the blast furnace Normal production. When the blast furnace runs normally, the blast furnace gas gradually passes through the TRT. When the TRT speed reaches the speed at which the speed-change clutch is engaged, the speed-change clutch automatically engages, so that the blast furnace blower is jointly driven by the TRT and the motor, and the output power of the motor decreases to achieve the purpose of energy saving.
When the whole unit is in normal operation, the demand for blower air volume in various working conditions of the blast furnace is mainly achieved through the adjustment of the static blades of the blower. In any case, the blower unit is an independent system that can fully meet the various normal operations of the blast furnace. Working condition. At the same time, the stability of the blast furnace top pressure is mainly achieved by the static blade adjustment of the TRT. The TRT control system can send out complete control signals, including speed adjustment, load adjustment, automatic speed increase, automatic shutdown, and the blast furnace pressure relief valve group. All functions such as switching ensure that the top pressure of the blast furnace is stable under any circumstances and does not affect the normal production of the blast furnace.