SU499461A1

SU499461A1 - Fuel gas supply system

Info

Publication number: SU499461A1
Application number: SU1975099A
Authority: SU
Inventors: Николай Петрович Котов; Петр Иванович Сметанников; Олег Иванович Якимович
Original assignee: Предприятие Магнитогидродинамической Установки Главатомэнерго
Priority date: 1973-12-06
Filing date: 1973-12-06
Publication date: 1976-01-15

Description

1one

Изобретение относитс к системам дозированной подачи жидкости или газов и может быть использовано в различных област х промышленности дл автоматического поддержани посто нства весового расхода, например , при подаче топлива в МГД-генератор.The invention relates to systems for metering the supply of liquid or gases and can be used in various areas of industry to automatically maintain a constant weight flow rate, for example, when fuel is supplied to an MHD generator.

Известна система подачи газообразного компонента топлива, содержаща расходные емкости и трубопровод подачи с установленными на нем последовательно фильтром, газовыми редукторами, отсечным клапаном и мерным соплом.A known system for supplying a gaseous component of a fuel, comprising supply vessels and a supply pipeline with filters, gas reducers, a shut-off valve and a measuring nozzle mounted on it in series.

Недостатком известной установки вл етс то, что при истечении газообразного компонента топлива из расходных баллонов происходит снижение температуры и, следовательно , будет происходить увеличение весового расхода газа при поддержании посто нного давлени на входе з МГД-генератор. Кроме того, система регулировани при помощи газовых редукторов оказываетс -инерционной и не обеспечивает требуемую точность регулировани .A disadvantage of the known installation is that when the gaseous component of the fuel outflows from the supply cylinders, the temperature decreases and, consequently, there will be an increase in the gas mass flow while maintaining a constant pressure at the inlet 3 of the MHD generator. In addition, the adjustment system using gas reducers turns out to be inertial and does not provide the required adjustment accuracy.

Целью изобретени вл етс обеспечение посто нства весового расхода и выполнение точности регулировани .The aim of the invention is to provide a constant weight flow rate and to perform control accuracy.

Указанна цель достигаетс тем, что на трубопроводе подачи выполнено ответвление п виде дополнительного трубопровода с мерным соплом, установленным параллельно основному соплу, причем выходы обоих сопл соединены и дополнительное сопло выполнено с меньшей по сравнению с основным соплом площадью критического сечени . На чертеже показана схема системы подачи газообразного компонента топлива в МГДгенератор .This goal is achieved by branching an additional pipeline with a measuring nozzle installed parallel to the main nozzle, the outputs of both nozzles are connected and the additional nozzle is made with a smaller critical section compared to the main nozzle. The drawing shows a diagram of the system of supplying the gaseous component of the fuel in the MHD generator.

Она состоит из расходных ба.члонов 1, фильтра 2, газовых редукторов 3, основного трубопровода 4 подачи газообразного компонента топлива, дополнительного трубопровода 5, мерных сопл 6 и 7, отсечных клапанов 8 и 9, установленных на основном и дополнительном трубопроводах соответственно, МГД-генератор а 10.It consists of consumable baht lines 1, filter 2, gas reducers 3, main pipeline 4 supplying the gaseous component of the fuel, additional pipe 5, measuring nozzles 6 and 7, shut-off valves 8 and 9 installed on the main and additional pipelines, respectively, MHD- generator a 10.

Устройство работает следующнм образо г.The device works as follows.

Если расход в основном трубопроводеIf the flow in the main pipeline

%.%

G,A(k)G, A (k)

VR (t°i + 273 15)VR (t ° i + 273 15)

а в дополнительном and in additional

,,

Кр. G,A(k)Cr. G, A (k)

1/;(г; + 273М5) 1 /; (g; + 273M5)

то суммарный весовой расход газаthen the total gas flow rate

..

A(k)A (k)

кр,cr,

+ :+:

Claims

-, / + 2.73М5 Ytl + 273М5 where the value is constant for the given gas; PI - the constant pressure is installed by a pressure gauge installed on the main pipeline; the condition of maintaining the constant pressure PI is provided by the operation of gas pressure regulators; P2 is the pressure in the cylinders of the gas lamp, which varies from 2nach D coa (or the pressure before the measuring seat installed on the additional pipeline). / 1 and 2 - gas temperature before the measuring nozzles (in general); i and 2 are reduced during plant operation. Kpi and Ркр, - the areas of critical nozzles on the main and additional pipelines, respectively, are constant. The increase in the weight flow rate of gas in the main and additional pipelines due to a decrease in ti and / 2 is compensated for by the decrease in weight flow in the additional pipeline due to the pressure drop in the gas cylinders of the rare earth metal. To regulate this process, it is possible to change the areas of critical sections of the nozzles. The parameters of the gas supply system, i, the choice of areas of critical sections, are adjusted by the gas-dynamic blow-downs of the gas supply system; Preparticularly, the start-up of the MHD generator iO sets up gas reducers 3 installed on the main pipe 4 for feeding the gaseous component of the fuel. When opening the shut-off valves 8 and 9, the gaseous component of the fuel is supplied to the MHD generator. The increase in the weight flow rate of the gaseous component of the fuel due to expansion and outflow from the supply cylinders 1 at a constant gas pressure before the measuring nozzle 6 operating in the critical mode is compensated by the fuel consumption through the additional pipeline 5. At the same time, due to the decrease in pressure of the gaseous fuel component before the measuring nozzle 7 operating in a critical mode, there will be a decrease in its weight flow through an additional pipeline. Claims An inlet system of gaseous fuel component, containing supply tanks and a supply pipeline with a filter, gas reducers, a shut-off valve and a measuring nozzle installed in series with it, in order to ensure constant weight flow and increase control accuracy, on the pipeline filing made branch in the form of an additional pipeline with a measuring nozzle installed parallel to the main Sonla, moreover, the outputs of both -sopl are connected and an additional nozzle performed with a smaller critical area compared to the main nozzle.