System Overview

The ZN-CE500/VOCs pollution source volatile organic compound emission continuous online monitoring system (hereinafter referred to as the ZN-CE500/VOCs system) is a new VOCs online monitoring system specially designed by our company based on domestic industry emission standards and the "HJ38-2017 Gas Chromatography Method for Determination of Total Hydrocarbons, Methane and Non Methane Total Hydrocarbons in Fixed Pollution Source Exhaust Gas" standard. The system adopts high-temperature extraction method for sampling, equipped with advanced separation technologies such as gas chromatography and mass spectrometry, as well as detection methods such as FID and PID, to measure the volatile organic compound gas components such as total hydrocarbons (THC), non methane total hydrocarbons (NMHC), aromatic hydrocarbons, and benzene derivatives in exhaust gas, meeting the monitoring requirements of national and industry standards for volatile organic compounds. At the same time, it can fully meet the communication requirements between the DCS system within the enterprise and the data system of the environmental protection department.

Application scenarios:

Stationary sourceVOCsOnline monitoring of emissions

fugitive emissionVOCson-line monitoring

Factory boundaryVOCson-line monitoring

Product advantages

◆The system sampling pipeline adopts imported polished stainless steel pipes to reduce the adsorption on the pipe wall

◆The system adopts full calibration to eliminate the influence of a small amount of adsorption on measurement and achieve automatic zero and range calibration functions

◆useGC-FIDgasThe chromatographic analysis method is consistent with the calibration method and conforms to national standards

◆High temperature throughout the entire process180℃Heat tracing sample transfer, high temperatureFIDinspectMeasure and avoid high boiling pointsVOCsAdsorption and condensation, no adsorption or blockage of the sample Phenomenon; The entire flow path and component materials are suitable for various mixed harsh working conditions such as high temperature, tar, high pressure, and high corrosion. They can also be applied in explosion-proof and non explosion-proof situations, with more accurate measurements

◆Continuous operation without maintenance design, automatic cycle operation upon startup, truly online analysis

◆Simultaneous monitoring of non methane total hydrocarbons and components such as benzene, toluene, and xylene

Product composition

This system adoptsGC-FIDGas phasechromatographic analysisinstrument+ZN-T04 sampling probe+TPF-400 temperature pressure flow integrated monitoring instrument consists of three parts

▂GC-FIDGas phasechromatographic analysisinstrument

Non methane total hydrocarbons and benzene derivatives online gas chromatograph, using three valve, four column, dual columnFID configuration, full process high-temperature heat tracing measurement, sample gas is quantified by a quantitative loop, injected with three valves, separated by four columns, and then ionized by a dual hydrogen flameMonitor (Dual)FID monitoring, pre FID determination of sample gasMedium total hydrocarbons（The concentrations of THC and CH4, as well as the concentration of non methane total hydrocarbons, are calculated by subtraction and are consistent with the national standard (HJ38-2017); Measure the concentration of various benzene derivatives in the sample using post FID.Applicable for monitoring the content of non methane total hydrocarbons and benzene, toluene, ethylbenzene, xylene, trimethylbenzene, styrene, isopropylene, etc. in pollution source exhaust gas.

You can also configure the order as neededFIDmonitorThe device comes separatelymonitorNon methane total hydrocarbons or benzene derivatives.

★ Features:

◆Stable and safe operation, unmanned, self extinguishing protection, automatic resumption of operation, remote alarm diagnosis

◆The instrument has good qualitative and quantitative repeatability, low detection limit, and low detection limit for benzene derivativesto0.05ppm.

◆Low maintenance, long service life, high imported parts for the whole machineextend40%

◆The software is easy to operate.

▂ZN-T04 sampling probe

The ZN-T04 sampling probe is a professionally designed sampler based on various combustion process conditions (high temperature, high humidity, high dust, high corrosion). The flue gas sampling probe comes with temperature control and display, automatic blowback unit, automatic calibration and other functions. The probe adopts an adjustable temperature controller, with a temperature controlled at 180 ℃± 10%, and the temperature can be adjusted. The sampling tube and filter element are made of high-temperature resistant materials, and the filter element is designed according to different working conditions, with functions such as good filtration and low air resistance. The blowback control device regularly blows back the filters of the sampling probe and gas sampling probe to prevent smoke and dust from blocking the sampling probe and filter, leading to blockage of the gas sampling path.

According to customer requirements, the ZN-T04 smoke sampling probe can be customized with explosion-proof probes（ExdIICT4）,Mainly used in high dust environments such as chemical and metallurgical industries that require explosion-proof measures,Especially suitable for VOCs flue gas monitoring systems and chemical process monitoring systems.

★ Features:

◆Smoke sampling dedicated probe, with a box insulation thickness of 30mm and no temperature condensation points

◆The sample airflow path is made of stainless steel material, and the filter element and chamber are specially designed (patented technology) for quick disassembly

◆High temperature ball valve cut-off function, reverse blowing gas tracing, better dust reverse blowing effect, with sampling, reverse blowing, and probe calibration functions

◆The sealing gasket is made of graphite material, the overall stainless steel material, and a specially designed high-temperature globe valve (valve body resistant to220High temperature, high temperature and efficient blowback

◆Efficient internal and external blowback structure design effectively removes dust, avoids blockage, and reduces daily maintenance

▂TPF-400 temperature pressure flow integrated monitoring instrument

The TPF-400 temperature pressure flow integrated monitoring instrument is a temperature pressure flow integrated monitoring instrument developed specifically for low or high flow rate conditions ranging from 0-5 to 40m/s. The instrument adopts a high-precision thermal principle sensor and differential pressure sensor pitot tube structure design, combined with automatic calibration and automatic blowback technology. Its main function is to monitor the temperature, pressure, and flow rate parameters in the flue gas, and convert them into corresponding proportional currents (4-20) mA, which are transmitted to the industrial computer for data processing. It consists of a pitot tube unit and a chassis unit, and can be installed and continuously measured indoors and outdoors.

According to the customer's environmental requirements,TPF-400Integrated temperature pressure flow monitoring instrumentapproveCustomized explosion-proof monitoring instrument（ExdIICT4）,Mainly used in petrochemical applications that require explosion protection,Especially applicablea surnameVOCssmokeGas monitoring system and chemical process monitoring system.

★ Features:

◆Implementation of low range temperature pressure flow using ultra-high precision differential pressure sensors0～5m/s low flow velocity measurement

◆Equipped with a LCD display operation unit, providing a good interpersonal interaction interface, integrated, structurally sophisticated, and easy to install

◆Sampling tubes have high corrosion resistance in high temperature, high humidity, and high temperature dust environments

◆According to the on-site installation conditions, it is possible to choose between integral or split installation

System product parameters

Application Fields

Online monitoring of urban ambient air, online monitoring of volatile organic compounds at the discharge outlets or factory boundaries of chemical industrial parks, and extended online monitoring of specific pollutants; petrochemical industry、electronic industry、Manufacturing of pharmaceuticals, rubber products, and organic solvents、spray、automobile making、print Waiting for the industry.