Vertical temperature-reducing system

Abstract

The invention provides a vertical temperature-reducing system, which comprises a shell, a valve base, a valve clack, a guiding sleeve and a damping device. The valve base is fixed on the shell and is provided with a throat part through which steam flows; the valve clack changes the flow area of the throat part according to the length stretching into or stretching out of the throat part; the guiding sleeve is sleeved on the valve clack; and the damping device provides resistance for the valve clack. The damping device comprises an elastic member arranged in a through hole which is radially arranged on the valve clack, and two ends of the elastic member are respectively abutted against an inner wall of the guiding sleeve. The valve clack is arranged at the position of the throat part; the guiding sleeve is sleeved on the valve clack to be capable of moving on the throat part axially; and meanwhile, the damping device provides the resistance in the axial direction for the valve clack, and the resistance and the pressure difference formed by in and out of the steam are coordinated to enable the valve clack to stretch into or stretch out of the throat part. The flow area of the throat part is changed according to the movement of the valve clack at the throat part, so that the flow velocity of the steam is effectively controlled, the steam is contacted with the cooling water flowingthrough a nozzle hole to ensure an atomization effect, thereby improving the effect of temperature reduction.

Description

technical field [0001] The invention relates to the technical field of boilers, more specifically, to a vertical desuperheating system. Background technique [0002] With the rapid development of large-scale boilers today, its units have entered a new era of large-capacity, high-parameter, diversification, and automation development, and the corresponding desuperheating of steam has also received more and more attention. The traditional horizontal desuperheating device can no longer meet the requirements of its process system due to slow desuperheating process, poor atomization effect, poor temperature control accuracy, high noise, large vibration and low safety. Nowadays, vertical desuperheating devices with high temperature adjustment accuracy, low noise, small vibration, erosion resistance and high safety are generally used, which include desuperheater main body, check valve, water supply pipe, thermometer, control system, flange components , Water supply regulating valv...

AI Technical Summary

Problems solved by technology

Because the throat flow area formed by the Venturi tube 1 and the flute nozzle 2 is constant, the flow velocity of the steam decreases accordingly as the flow rate of the steam decreases. The less sufficient the water contact, the worse the atomization effect will be, resulting in unsatisfactory cooling effect

Images