Rotating disc type reflux ratio controller

Abstract

A rotating disc type reflux ratio controller comprises an external barrel, a liquid distributing tank, a separator plate, an adjusting rod, a rotating shaft, a supporting seat and a control motor. The external barrel is an enclosed structure and is composed of a lower cylinder and an upper head which are connected through a flange, and a bottom cap is a flat plate. The inside of the lower cylinder of the external barrel is divided by the separator plate from the center into two halves which are not communicated with each other. The upper center of the separator plate and the supporting seat are fixed together through a welding method. The liquid distributing tank is a cylinder with an upper opening. Half of the cylinder's side face is provided with small holes with phi 0.5-15, and the other half of the side face is imperforate. The two halves are separated by the use of two vertical lathes outside the cylinder. The rotating shaft passes through a bottom cap hole to be fixed with the bottom cap. The lower end of the rotating shaft, coming out of the bottom cap of the liquid distributor, is inserted into the supporting seat. The rotating shaft is connected with the adjusting rod to extend out of the external barrel through a sealing device so as to be connected with the control motor. The control motor drives the rotating shaft so as to rotate the rotational angle of the liquid distributing tank. Two sides of the separator plate of the bottom cap of the cylinder are respectively provided with a liquid outlet. One liquid outlet is a reflux port and the other liquid outlet is an output port.

Description

technical field [0001] The invention belongs to the field of chemical machinery and relates to a reflux ratio controller, which is mainly used for the control of reflux and output of a chemical distillation tower. Background technique [0002] The rectification tower is one of the main equipments in the chemical industry. Almost all chemical products, especially petrochemical (organic chemical) products, are finally obtained by rectification. The operation of the rectification tower, one is to control the heating capacity of the kettle, and the other is to control the ratio of reflux and extraction (ie reflux ratio), the most difficult is the latter. The existing reflux ratio controller is a swing-type reflux ratio controller developed by Tianjin University. The main components are outer cylinder, partition, liquid separator and solenoid valve. The output flow is pulsed, that is, one by one, and the flow cannot be measured. When the reflux ratio is very large and small, su...

AI Technical Summary

Problems solved by technology

Because there is no mature and reliable reflux ratio controller, the reflux ratio of small and medium-sized distillation towers in chemical plants is manually controlled, and the reflux ratio is controlled by production valves, reflux and production flow meters

Large-scale continuous distillation towers can use automatic regulating valves to control the reflux flow, but this is not suitable for small and medium-sized towers and batch towers. First, the automatic control technology for small flow is not yet mature, and second, the flow of intermittent towers is inherently unstable. The automatic control just moved the valve to the computer - the essence is still manual adjustment

[0003] In order to solve the problem of the reflux ratio controller, Tianjin University has proposed a series of patents, such as the night curtain type reflux ratio controller (CN 1236656A) invented by Shang Ju et al. Flow type reflux ratio controller (CN 1043960C), the overflow type reflux ratio controller with separation roller and auxiliary transmission mechanism invented by Wang Hansheng and the overflow type reflux ratio controller with separation and cover partition auxiliary transmission mechanism (CN1093298A ), Wang Hansheng et al. invented a small-hole outflow reflux ratio controller with a partition covering the partition and a transmission mechanism and a transverse gap outflow reflux ratio controller with a partition covering the partition and a transmission mechanism (CN 2207865Y), but these The devices are relatively complicated and have not been promoted in industry

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