井筒供暖汽改水动态变频恒温自动控制系统

Well chamber heating air-to-water and dynamic frequency-conversion constant-temperature autocontrol system

将井筒供暖热媒由蒸汽改为电厂锅炉房的低温热水,并实现了井筒汽改水动态变频恒温自动控制.热水热媒流经的通道均采用铜管,铜管周围采用铝合金翅片,增大了与空气的接触面积,进一步提高了传热效果.井筒保温空气加热机采用变频闭环控制,所有电机运行用PLC来实现集中控制.温度检测采用温度传感器或热电偶,进行3点检测,并对这3个点进行比较,以最低点为基准,利用变频器内置PI调节器实现闭环自动控制.布置大小不同的机组,可根据不同负荷调节,调节灵活,节能降耗效果显著.实验结果表明,该设计有效防止了井壁渗漏水的结冰现象.

Changed the well chamber heating intermedial from the steam to the power plant boiler room＇ s low temperature hot water, and realized the well chamber＇ s steam changes to the water dynamic frequencyconversion constant temperature automatic control. Intermedial flows after the channel, which used the copper pipes and greatly strengthened the heattransfer efficiency. Around the copper pipes used the aluminumalloy wing pieces, which in- creased the air-contacted area and further enhanced the heat transfer effect. Well chamber heat preservation airheating machine used the frequency conversion closed-loop control. All electrical machinery movement realized the common control with PLC. The temperature examination used the temperature sensor or thethermo-element and carried on three-points examinations. These three points carried on the comparison and took the lowest point as the datum. U- sing the frequency changer＇ s PI regulator realized closed loop automatic control. The different sizes of units can adjust act according to the different load. The adjustment is nimble and its low consume is remarkable. The result indicats that this design effectively prevents the phenomenon of the wall of well percolating water-icing ices.