SU909408A1

SU909408A1 - Method of controlling discharge of water-steam media from separator built in direct-flow boiler tract

Info

Publication number: SU909408A1
Application number: SU792796114A
Authority: SU
Inventors: Игорь Алексеевич Якубенко; Василий Николаевич Пак
Original assignee: Красноярский Политехнический Институт
Priority date: 1979-07-11
Filing date: 1979-07-11
Publication date: 1982-02-28

Description

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Изобретение относитс к теплоэнерf-етике и может быть использовано дл управлени режимом работы сепарационного узла при растопке пр моточного парогенератора.The invention relates to heat energy and can be used to control the operation mode of the separation unit when firing the steam generator.

Известен способ регулировани сброса паровод ной среды из сепаратора , встроенного в тракт пр моточного котла, путем измерени температуры металла верха и низа горизонтального участка паропровода и изменени клапана сброса по разности измеренных сигналов ГОНедостатком способа вл етс то, что он может быть реализован только при наличии двухфазной среды после первой ступени нагрева, что может быть только при значительных забросах влаги из сепаратора в перегреватель . Из-за удаленности места замера от регулирующего органа, косвенный параметр обладает большой инерционностью .The known method of controlling the discharge of the steam-water medium from the separator integrated into the path of the flow boiler by measuring the temperature of the metal of the top and bottom of the horizontal section of the steam line and changing the relief valve based on the difference of the measured signals of the GONED method is that it can be realized only if there is a two-phase environment after the first stage of heating, which can only be with a significant intake of moisture from the separator to the superheater. Due to the remoteness of the measurement site from the regulatory authority, the indirect parameter has a large inertia.

Цель изобретени - снижение инерционности .The purpose of the invention is to reduce inertia.

Поставленна цель достигаетс тем, что измерение температур осущестал -. ют на входе в перйую после сепаратора поверхность нагрева.The goal is achieved by measuring temperature. are heated at the entrance to the first after the separator.

На чертеже представлена схема устройства, реализующего предлагаемый способ.The drawing shows a diagram of the device that implements the proposed method.

На регул тор 1 сброса паровод ной To the regulator 1 of the steam

10 среды из сепаратора 2, воздействующего на клапан 3 сброса, установленный на линии 4 сброса среды из сепаратора , поступают сигналы от термопар 5 и 6, измер ющих температуры металла 10 of the medium from the separator 2 acting on the discharge valve 3 installed on the line 4 of the discharge of the medium from the separator, signals from thermocouples 5 and 6 are received, measuring metal temperatures

ts верха и низа горизонтального участка паропровода 7 на входе в первую после сепаратора поверхность 8 нагрева.ts of the top and bottom of the horizontal section of the steam line 7 at the entrance to the first heating surface 8 after the separator.

Регулирование сброса паровод ной среды осуществл ют следующим обра30 зом.The regulation of the discharge of the steam-water medium is carried out as follows.

Claims

When the steam generator is kindled, the superheating heating surface 8 is washed by a stream of gases having a temperature of 390 than the temperature of the medium at the outlet of the separator.

2. Due to the thermal conductivity of the metal, heat from the heating surface is transferred to the steam line 7, which is cooled by the flow of the medium from the separator. The vapor at the outlet of the separator has some moisture due to the imperfect process from the separation of moisture in the separator; therefore, the horizontal sections of the steam line 7 at low flow rates, characteristic of pilot modes, separate the flow of the medium, and the lower part of the steam line is cooled by the liquid phase, and top - gaseous. This leads to more intensive cooling of the bottom of the steam line and the occurrence of the temperature difference between the metal of the top and bottom of the steam line 7. As the ambient humidity at the exit of the separator 2 increases, the intensity of cooling by the liquid phase of the metal of the bottom of the steam line 7 increases, leading to an increase in the temperature difference between the top and bottom. thermocouples 5 and 6. This dependence allows the use of this temperature difference as an indirect parameter characterizing the moisture content of the vapor at the outlet of the separator to control the discharge of the medium from the separator torus. The regulation is reduced to pores, keeping a constant value of the temperature difference between the metal of the upper and lower horizontal sections of the steam line 7 at the entrance to the first heating surface 8 after separator 2 by changing the position of the relief valve 3 on the medium discharge line from the separator. The advantage of the proposed control method is to reduce the inertia of the measured parameter due to the closer location of the measurement site to the regulator, as well as the presence of a two-phase medium only at the entrance of the heating surface first after the separator, which leads to an increase in the reliability of the steam generator when bore. Claims The method of controlling the discharge of the steam-water medium from a separator integrated into the path of the flow boiler by measuring the temperature of the metal of the top and bottom of the horizontal section of the steam line and changing the position of the relief valve by the difference of the measured signals, characterized in that the temperature measurement is reduced carried out at the entrance to the first heating surface after SeptoTopa. Sources of information taken into account in the examination 1. USSR author's certificate in application No. 262793V Cl. F 22 8 35/1, 1978.

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