SU918656A2 - Method of automatic control of steam-water fluid discharge from firing separator - Google Patents

Description

(54) THE METHOD OF AUTOMATIC REGULATION OF THE RESETTING OF THE WATER-MEDIUM ENVIRONMENT FROM A BATTERY SEPARATOR

one

This invention relates to the automation of heat and power units with direct flow boilers.

According to the main author. St. No. 669145, a method for automatically discharging a steam-water medium from a pilot separator incorporated in a TpaKt recirculating boiler is known by acting on the relief valve by an indirect parameter characterizing the state of steam, for which the temperature and pressure of steam the pressure signal is nonlinearly transformed and the diversity of the received signals 1 is used as an indirect parameter.

The disadvantage of the known method is the low speed and the associated reduction in the quality of regulation.

The purpose of the invention is to increase the speed and quality of regulation.

This goal is achieved by additionally measuring the rate of change of the regulating effect on the reset valve and adjusting the value of the indirect parameter according to the received signal.

The drawing shows a diagram of the device that implements the proposed method.

The regulator 1 releases the medium from the pilot separator 2, acting through the actuator 3 to the relief valve 4, receives a signal from the steam temperature sensor 5, a signal from the pressure sensor 6 through the non-linear conversion device 7, a signal from the regulating valve 4 position sensor 4 through the device differentiation 9 and the signal from the setter 10. The temperature sensor 5 and the pressure sensor 6 are installed downstream of the first steam superheater after the steam generator 11.

The scheme works as follows.

In the package 11 of the superheater from the separator 15 of the torus 2 comes saturated steam. At some part of the package 11, the steam is still in a saturated state and its temperature IH does not change and depends on pressure. In the next section of the package 11, the steam goes to overheating and its temperature increases to 1N 20. In the case of static adjustment of the regulator, the signal coefficients for the temperature of the nonlinear converter 7, setpoint 10 and controller 1 are chosen as

Thus, the static characteristic of the regulator lies on the At ° C setpoint above the saturation line. The value of At ° C can be set and variable depending on the pressure and is determined by the adopted boiler kindling program.

In addition, to the input of the regulator 1 It is supplied from the differentiator 9 of the first derivative of the signal according to the position of the regulating valve of the reset valve or according to the flow rate of the medium discharged from the separator, which improves the quality and speed of regulation with an unfavorable steam superheat temperature xg control valve characteristics.

Claims (1)

The invention The method of automatic control of the discharge of the steam-water medium from the pilot separator, integrated into the path of the flow boiler, according to the author. St. No. 669145, characterized in that, in order to increase the speed and quality of the regulation, the rate of change of the regulating effect on the dump valve is also measured, and the value of the indirect parameter is corrected by the received signal. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 1881845 / 24-06, cl. F 22 B 35/14, 1973. ABOUT