SU1278032A1

SU1278032A1 - Apparatus for modelling electric precipitator for cleaning gas

Info

Publication number: SU1278032A1
Application number: SU853869762A
Authority: SU
Inventors: Николай Ильич Джус
Original assignee: Dzhus Nikolaj
Priority date: 1985-01-31
Filing date: 1985-01-31
Publication date: 1986-12-23

Abstract

Изобретение относитс к устройству дл моделировани электрофильтра очистки газа , может быть использовано в химической промышленности и позвол ет расширить функциональные возможности устройства и повысить точность моделировани . Устройство содержит конденсатор 1, соединенный последовательно с резистором 2, а параллельно - с вторым резистором 3, стабилитроном 4, делителем (Д) 5 напр жени , управл емым ключом 6 (электронна лампа, транзистор, тиристор), снабженным блоком 7 управлени . Выход Д 5 подключен по первому каналу через последовательно соединенные блок 12 нелинейности, генератор 10, а по второму каналу - через последовательно соединенные блок 13 нелинейности генератор 11, одновибратор 9 к двух входам элемента И 8, св занного выходом с входом блока 7. I ил. Q W ю 00 о оо юThe invention relates to a device for simulating an electrostatic precipitator for gas cleaning, can be used in the chemical industry, and allows for expanding the functionality of the device and improving the accuracy of the simulation. The device contains a capacitor 1 connected in series with a resistor 2, and in parallel with a second resistor 3, a Zener diode 4, a voltage divider (D) 5, controlled by a switch 6 (electronic lamp, transistor, thyristor) equipped with a control unit 7. Output D 5 connected through the first channel through serially connected block 12 nonlinearity, generator 10, and through the second channel through serially connected block 13 nonlinearity generator 11, one-shot 9 to two inputs of the element And 8 connected output to the input of block 7. I il . Q W y 00 o oo y

Description

Изобретение относитс к области электрической очистки газов.This invention relates to the field of electrical gas cleaning.

Цель изобретени - расширение функциональных возможностей и повышение точности моделировани процессов в электро- фильтрах.The purpose of the invention is to expand the functionality and improve the accuracy of modeling processes in electric filters.

На чертеже представлена блок-схема предлагаемого устройства.The drawing shows a block diagram of the proposed device.

Устройство содержит конденсатор 1, последовательно с которым вклюнен резистор 2. Параллельно конденсатору подключены цень, состо ща из последовательно соединенных второго резистора 3 и стабилитрона 4, а также делитель 5 напр жени . Параллельно цепи из конденсатора 1 и резистора 2 включен управл емый вентиль 6 (электронна , транзистор, тиристор), снабженный блоком 7 управлени . К входу блока 7 через блок 8, представл ющий схему И, подсоединены одновибратор 9 и генератор 10, причем к входу одновибратора 9 подсоединен второй генератор 11. Оба генератора через блоки 12 и 13 нелинейности подключены к делителю о напр жени .The device contains a capacitor 1, in series with which a resistor 2 is switched on. Parallel to the capacitor are connected a value consisting of a series-connected second resistor 3 and a zener diode 4, as well as a voltage divider 5. Parallel to the circuit from capacitor 1 and resistor 2, a controlled valve 6 (electronic, transistor, thyristor) is connected, equipped with a control unit 7. A one-shot 9 and a generator 10 are connected to the input of block 7 through block 8 representing the circuit AND, and a second generator 11 is connected to the input of one-shot 9. Both generators are connected to a voltage divider through blocks 12 and 13 of nonlinearity.

Устройство моделирует характеристики электрофильтров при испытании а1 регатов питани , настройке их динамических характеристик . Оно может использоЕштьс при физическом и аналоговом (.мате.матическо.м) моделировании. Вход устройства подключаетс к агрегату питани (не показан). При этом конденсатор 1 воспроизводит геометрическую емкость электрофильтра, резистор 2 - внутреннее сопротивление, резистор 3 и стабилитрон 4 - характеристику коронного разр да. При напр жени х 30-35 кВ и выше в электрофильтре возникают искровые пробои, а песколько выше - дуговые пробои.The device simulates the characteristics of electrostatic precipitators when testing a1 power regatta, setting up their dynamic characteristics. It can be used with physical and analog (.mat.matical.m) simulations. The input of the device is connected to a power unit (not shown). In this case, the capacitor 1 reproduces the geometric capacitance of the electrostatic precipitator, the resistor 2 — the internal resistance, the resistor 3, and the zener diode 4 — the characteristic of the corona discharge. At voltages of 30–35 kV and higher, spark breakdowns occur in the electrostatic precipitator, and sand breakers - arc breakdowns.

Устройство работает следующим образом .The device works as follows.

При достижении паир жепием на коп- денсаторе 1 уровн начала пробоев сигнал, пропорциональный напр жению, сппмае- мый с делител 5, вызывает на выходе блоков 12 и 13 нелинейности сигнал, за 1ускаю- щий в работу генераторы 10 и 11 импульсов. Блоки 12 и 13 нелинейности вьпюлнены известным образом, например па основе диодных функциональных преобразователей. Генераторы 10 и 11 вьнюлнепы управл емыWhen the pair reaches the breakdown level 1 at the start of the breakdown signal, a signal proportional to the voltage, which is fed from divider 5, causes a signal at the output of blocks 12 and 13 of the nonlinearity, after which the generator of 10 and 11 pulses starts to work. Blocks 12 and 13 of nonlinearity are compiled in a known manner, for example, on the basis of diode functional converters. Generators 10 and 11 are snoop controlled

ми, частота их импульсов пропорциональна входному напр жению. Генераторы однотипны . Узкие импульсы генератора 10, воздейству через схему И на блок 7 управлени , вызывают кратковременные открыти вентил 6. Это имитирует искровые пробои в электрофильтре.their pulse frequency is proportional to the input voltage. Generators are of the same type. The narrow pulses of the generator 10, acting through the circuit And on the control unit 7, cause short-term opening of the valve 6. This simulates the spark breakdowns in the electrostatic precipitator.

Генератор 11 запускает одновибратор 9, который расшир ет его импульсы до длительности , характерной дуговым разр дам (не менее 10 мс). Эти импульсы, как и искровые импульсы генератора 10, проход т через схему И на блок 7 управлени , который вызывает включение вентил 6.The generator 11 starts the one-shot 9, which expands its pulses to a duration characteristic of the arc bit (not less than 10 ms). These pulses, like the spark pulses of the generator 10, pass through the circuit AND to the control unit 7, which causes the valve 6 to be turned on.

Таким образом использование управл емых генераторов и блоков нелинейности позвол ет воспроизвести не только статические , но и динамические характеристики электрофильтра как объекта регулировани . Это особенно важно при анализе и настройке систем автоматического управлени агрегатами питани элект)офильтров, дает возможность в одних и тех же услови х сравнивать разные типы систем управлени и их параметров. Благодар этому расц ир ютс функциональные возможности и повышаетс точность устройства мо;1,елироварш электрофильтров .Thus, the use of controlled generators and nonlinearity blocks allows reproducing not only static but also dynamic characteristics of an electrostatic precipitator as an object of regulation. This is especially important when analyzing and setting up automatic control systems for power supply units of electrofilters, which makes it possible under the same conditions to compare different types of control systems and their parameters. As a result, the functionality is enhanced and the accuracy of the MO-1 device, the electric filter of electric filters, is increased.

Claims

This invention relates to the field of electrical gas cleaning. The purpose of the invention is to expand the functionality and improve the accuracy of modeling processes in electrostatic precipitators. The drawing shows a block diagram of the proposed device. The device contains a capacitor 1, in series with which a resistor is switched on.

2. Parallel to the capacitor are connected the price consisting of the second resistor 3 and the zener diode 4 connected in series, as well as the voltage divider 5. Parallel to the circuit from capacitor 1 and resistor 2, a controlled valve 6 (electronic, transistor, thyristor) is connected, equipped with a control unit 7. A one-shot 9 and a generator 10 are connected to the input of block 7 through block 8 representing the circuit AND, and a second generator 11 is connected to the input of one-shot 9. Both generators are connected to a voltage divider through blocks 12 and 13 of nonlinearity. The device simulates the characteristics of electrostatic precipitators when testing power supply units, setting their dynamic characteristics. It can be used with physical and analog (.mat.matical.m) simulations. The input of the device is connected to a power unit (not shown). In this case, the capacitor 1 reproduces the geometric capacitance of the electrostatic precipitator, the resistor 2 — the internal resistance, the resistor 3, and the zener diode 4 — the characteristic of the corona discharge. At voltages of 30–35 kV and higher, spark breakdowns occur in the electrostatic precipitator, and sand breakers - arc breakdowns. The device works as follows. When the pair reaches a breakdown level at the beginning of the breakdown on the capacitor 1, a signal proportional to the voltage, spmmed from the divider 5, causes the output of the non-linearity blocks 12 and 13 to trigger the generator of the 10 and 11 pulses into operation. Blocks 12 and 13 of nonlinearity are compiled in a known manner, for example, on the basis of diode functional converters. The generators 10 and 11 are snoop controlled, the frequency of their pulses is proportional to the input voltage. Generators are of the same type. The narrow pulses of the generator 10, acting through the circuit And on the control unit 7, cause short-term opening of the valve 6. This simulates the spark breakdowns in the electrostatic precipitator. The generator 11 starts the one-shot 9, which expands its pulses to a duration characteristic of the arc bit (not less than 10 ms). These pulses, like the spark pulses of the generator 10, pass through the circuit AND to the control block 7, which causes the valve 6 to be turned on. Thus, the use of controlled generators and nonlinearity blocks allows to reproduce not only static, but also the dynamic characteristics of an electrostatic precipitator as an object to be controlled. . This is especially important when analyzing and setting up automatic control systems for power supply units of electrofilters, which makes it possible under the same conditions to compare different types of control systems and their parameters. As a result, the functionality is enhanced and the accuracy of the MO-1 device, the electric filter of electric filters, is increased. The invention is a device for simulating a gas cleaning electrostatic precipitator comprising a series-connected resistor) and a capacitor, in parallel to which is connected a circuit consisting of a second resistor and a zener diode, a voltage divider and a controllable valve and (one unit with a control unit of the first pulse generator, different the fact that, in order to evaluate the functional capabilities of the device, to improve the accuracy of the simulation, it additionally contains two blocks of nonlinearity, the second pulse generator, novibrator, circuit I, while the inputs of the nonlinearity blocks are subcategories to divide; but the voltages and outputs are to the inputs of the generators and pulses, the outputs of which are connected to the inputs of the circuit And directly and through the one-shot, and the output of the circuit AND are connected to the unit management