Siemens
СРЕДСТВА ПРОМЫШЛЕННОЙ АВТОМАТИЗАЦИИ
официальный партнер Сименс
Каталог СА01 2018
(4872) 700-366
skenergo@mail.ru

HM-1400 TRX system components

Sampling system

The sampling system consists of a sampling probe and a sampling line. Both components are heated to 180 °C. With flue gas temperatures < 200 °C, the sampling tube must also be in heated tube design to prevent faulty measurements (lower findings for the mercury concentration measurement due to the absorption properties of HgCl2).

Gas patch switchover

The sample gas is extracted condensate-free from the exhaust stack with approx. 100 Nl/h and fed via a three-way ball valve to the thermocatalytic reactor. The path switchover is also heated and is operated as component of the measuring device by means of the device control. You can select between sample gas connection, reference connection or zero gas connection.

Thermocatalytic reactor

The total mercury analysis measures not only the elementary metallic mercury that is stored freely in the sample gas or deposited in the materials, but also measures the chemically bonded mercury that is found in the flue gas. The ionic mercury must also be converted into elementary, atomic mercury so that the detector can acquire and evaluate the total mercury. The thermocatalytic reactor carries out this function at a preset operating temperature.

Gas drying

Before the mercury content is determined, the now created sample gas containing Hg0 is dried while flowing through a Peltier cooler. At the same time the system pressure and the measured gas temperature are continuously recorded.

2-beam UV photometer

The sample gas enters the measuring cuvette and is then routed over a selective filter in which the mercury is absorbed. The sample gas thus freed from the mercury then flows through the reference cuvette. The advantage of this cuvette switching is that the entire gas matrix flows through both the measuring cuvette and the reference cuvette and most of the mercury is selectively filtered out before it reaches the reference cuvette. This principle of differential measurement means that the measurement is less sensitive to spectrometric interference components than the single-beam photometer that has only one cuvette. The measured signal from the photometer is taken over by the internal PLC.

Gas volume flow generation

When the sample gas volume flow leaves the 2-beam UV photometer, it passes through the vacuum pump which generates the gas flow. The volume flow of approx. 100 Nl/h is set manually with the fine regulating valve. The system pressure and sample gas temperature parameters are measured after the gas drying at the photometer, where the mercury is also measured, and are used ultimately to convert the gas volume flow to standard conditions. The mercury concentration as result of a measurement is output as 4 to 20 mA current signal to match the set measuring range of 0 to X µg/Nm3 (dry).

Integrated HgCl2 calibration gas generator

A HgCl2 calibration gas generator is integrated in the analyzer as a standard feature. The gas generator generates a defined mercury concentration and is used for regular zero point control. It can also be used to check the linearity of the device's characteristic curve. The zero point control can be integrated automatically into the measuring sequence or triggered manually. The reference concentration can be freely parameterized.

Optional
  • Diluter
  • Specification module for the separate measurement of elemental and ionic mercury
  • Side-mounted cooling device
  • Heated sample pipe 0.6 m, 1.0 m, 1.5 m
















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Арматура DENDOR

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Датчики и измерители

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Регуляторы и регистраторы

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Пневматическое оборудование

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Краны и Клапаны

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Измерительные приборы

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Системы беспроводного управления «умный дом»

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Бесконтактные выключатели Конечные выключатели Оптические датчики Энкодеры

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SKW-FS - Установка умягчения

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SKW-FK - Установка обезжелезивания

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