Natural gas component chromatographic analyzer

GS-300

Natural gas specific analyzer

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Shanghai Chuanhao Instrument Co., Ltd

Catalog

1. Warranty and After sales Service Page 3

2. Safety precautions page 4

3. Instrument Overview Page 5

4. Chapter: Whole Machine Structure and Installation, Page 7

5. Chapter 2: Keyboard and Its Operation Page 9

6. Chapter 3: Installation and Use of Thermal Conductivity Detector Page 10

Guarantee and after-sales service

Guarantee:

1. Effective warranty period

The effective warranty period for this instrument is one year from the date of installation.

2. Terms and Conditions

During the warranty period, if any component of the instrument is damaged due to manufacturing reasons, the manufacturer will replace and repair it free of charge.

3. The free warranty does not include the following content

(1) Due to misoperation;

(2) Due to maintenance or debugging by personnel not designated by the manufacturer or our company;

(3) Due to factors outside of this instrument;

(4) Due to use in harsh environmental conditions such as high temperature, high humidity, corrosive gases, vibration, etc;

(5) Caused by fire, earthquake or other uncontrollable factors;

(6) Caused by movement or transportation after installation;

(7) The free warranty does not include the replacement of consumables.

after-sale service:

If there is a malfunction with this instrument, please carefully check and follow the steps of "troubleshooting" to handle it correctly. If it still cannot work properly or there is no relevant description in the "troubleshooting" section, please contact our company.

Safety precautions

To ensure the safe operation of the instrument, please follow the following precautions:

1. Please use the instrument according to its designed purpose;

2. Please strictly follow the operating steps, warnings, and precautions listed in this manual;

3. Please do not disassemble or modify the instrument by yourself;

4. Please contact our company for the maintenance of the instrument.

This book uses the following two marking symbols to indicate the presence of danger. Please note:

pay attention toPlease strictly follow the "precautions", otherwise it may cause minor injury or damage to the instrument.

promptProvide key tips or practical techniques for easy operation.

*Our company reserves the right to modify and improve the appearance and components of the instrument.

Instrument Overview

1、 Overview

1、 GS-300 Natural Gas AnalyzerHigh integration of electronic circuits, good reliability, and simple operationTo ensure the stable and reliable quality of the instrument, it can operate continuously for a long time, which not only guarantees work efficiency but also saves maintenance costs. It automatically memorizes operating parameters and does not require resetting when starting up.

2、 The GS-300 natural gas analyzer is equipped with a gas cut-off protection system to prevent instrument damage caused by misoperation.

3、 The gas path system of the GS-300 natural gas analyzer adopts a high-precision valve structure, which greatly improves the stability of the instrument's gas velocity and achieves good reproducibility of analysis results.

4Thermal conductivity pool detector

(1) Sensitivity: not less than 4000mvml/mg (benzene H₂）

(2) Noise: not exceeding 1% of the recorder's full scale

(3) Drift: not greater than 3%/h of the recorder's full scale

5Instrument and weight

(1) Host size: 450 * 380 * 400mm

(2) Weight: Approximately 35kg

2、 Preparation work before installation

(1) Studio and Workbench: There should be no flammable or explosive gases, strong electromagnetic fields, or electrical spark interference around the studio, and good ventilation is required indoors; Prepare a workbench that can withstand the entire set of instruments, leaving appropriate gaps behind the instruments for work and maintenance.

(2) Power supply: The instrument uses a 220V50HZ AC power supply, and the input power of the power supply must be greater than the power consumption of the instrument; The power wiring board should have reliable contact; When the power supply voltage fluctuates greatly, a 3-5KW voltage regulator should be used to stabilize the voltage in a timely manner, otherwise the performance of the instrument cannot be guaranteed.

(3) Ground wire: To ensure the performance of the instrument and personal safety, the instrument must be reliably connected to the ground. It is recommended to bury the ground wire with a copper mesh or copper plate in wet soil below one meter deep. It is not allowed to use a power supply neutral wire instead of the ground wire, and it is not allowed to be connected to a water pipe or radiator.

(4) High purity hydrogen gas must be used for power and gas pipelines. Hydrogen gas should be supplied by high-pressure steel cylinders or hydrogen generators. The output pressure requirement for the gas source pressure reducing valve of this instrument is: hydrogen gas: 0.3MPa.

Pay attention to the following points during installation:

·First, refer to the information about using high-pressure steel cylinders, operate according to the requirements, and install the gas gauge

·The gas cylinder is securely placed, with strict fire prevention measures and the presence of electrical sparks around it

*Chapter Structure and Installation of the Whole Machine

Whole machine structure

GS-300The gas chromatograph adopts an integrated design, consisting of a host, various detectors and controllers, and a chromatographic workstation.

Gas path section:

GS-300The type gas chromatograph adopts a single gas path structure and can automatically compensate for a single column, thus achieving good baseline stability.

3Column room

GS-300The gas chromatograph adopts a large capacity column chamber, which is composed of a fan, electric furnace wire, temperature sensing platinum wire, and stainless steel chamber body, and has very high reliability.

3. Sample injector

Injecting through a gas six way valve ensures good reproducibility.

4. Detector

The instrument can be equipped with a TCD detector.

2、 Whole machine installation

1. Open box inspection: Check against the attachment list to see if the attachments are complete. If there are any errors, contact the manufacturer.

2. Prepare the workbench, power supply, and gas source

The instrument should be placed on a sturdy, vibration free or wooden workbench, with sufficient space left on the workbench for storing recorders, data processing machines, etc. There should be a certain amount of space at the back of the workbench for air circuit installation and instrument maintenance.

The power supply should be able to withstand a power of over 1KW. The main power distribution should be separately configured and separated from data processors, hydrogen generators, recorders, etc. to avoid mutual interference.

The detector's requirements for the gas source can be found in the following table:

3. Measure the insulation of the instrument with a multimeter in the megohm range, mainly measuring the insulation of the host power supply, recorder power supply, and chromatographic data processing machine power supply to its casing, which should be greater than 20M Ω.

4. Column installation

The injector and detector interfaces (inlet and outlet of the chromatographic column) configured for the instrument are located at the top of the column constant temperature box. The sealing structure and installation method of the chromatographic column are shown in the figure. The connector connecting the detector, chromatographic column, and injector is an M8 × 1 metric thread.

5. Installation of Purifier (User's Choice)

The purifier is equipped with 5A molecular sieves. Before connecting to the gas path, each sieve should be tested for leaks. When ensuring that there is no leakage, the outlet of the purifier should be emptied for about 30 seconds to prevent the fine powder of the molecular sieve from blowing into the gas path and affecting the performance of the instrument. If powder is blown out, the outlet of the purifier should be blocked again.

Long term use failure, the treatment method is to remove 5A molecular sieve from the purifier, place it in a clean muffle furnace, activate it at a high temperature of 420 ℃ for 24 hours, then reduce it to around 50 ℃, quickly put it into the purifier, test for leakage, and then connect it to the instrument.

6. Gas installation

Connect the steel cylinder with the pressure reducing valve installed to the purifier, and connect it to the air inlet joint of the instrument with an air pipeline. After connection, use soapy water to test for leakage and ensure that the seal is not leaking.

When using hydrogen, it is necessary to prevent external sources of fire.

pay attention toWhen connecting the instrument to the gas source, use copper or stainless steel pipes. If the pipeline has not been cleaned, rinse the inner wall of the pipeline with acetone, then dry it with anhydrous ethanol, or introduce 20ml/min nitrogen gas and burn it dry one by one with an alcohol spray lamp. If PTFE pipes are used, they are prone to air leakage due to aging and require regular inspection and maintenance.

7. Connect the ground wire

Connect the instrument host, hydrogen generator, computer, etc. firmly to the ground using a combination ground wire.

Chapter 2 Keyboard and Its Operation

• After the instrument is powered on, the PV window displays the input type, the SV window displays the range, and about one second later, the PV window displays the measured value and the SV window displays the set value. This is the standard display mode of the instrument.
• In standard display mode, the instrument may flash alternating PV values and the following characters:

HHH:Indicating that the input signal is exceeding the range, which may be caused by incorrect sensor specifications, open circuit input, etc;

LLL:Indicates that the input signal is negative beyond the range, which may be caused by incorrect sensor specifications, reverse connections, short circuits, etc.

• In the standard display state, if you hold down the setting button for 3 seconds, you can enter the following parameter setting state. To exit this state, simply press the SET button for one second.

Chapter 3 Installation and Use of Thermal Conductivity Pool Detector

The thermal conductivity cell detector adopts a semi diffusive structure, 100 Ω rhenium tungsten wire, constant current source power supply, built-in preamplifier, and has gas cutoff hot wire protection function.

1、 Precautions for use:

1There should be no corrosive substances in the carrier gas, and attention should be paid to gas path purification.

2Before use, the gas in the pipeline should be purged for 10-30 minutes to prevent oxidation of the rhenium tungsten wire. When the gas is not purged, bridge flow should be strictly prevented, otherwise the rhenium tungsten wire may be burned out.

3Do not blow the thermal conductivity detector directly with gas, or there may be significant airflow impact.

4Strong mechanical vibrations are not allowed.

5Do not place TCD at the air outlet; The TCD vent should be connected to the outside through a pipeline, and the outlet should also be fixed to prevent wind from swinging and affecting the baseline.

6If the machine is stopped, the power should be turned off first, and then the gas source should be turned off, which is beneficial for the service life of rhenium tungsten wire.

7When the sensitivity is sufficient, the bridge current should be reduced to improve the stability of the instrument and increase the service life of TCD.

8After completing the high-temperature analysis, when dismantling the column, be sure to wait for the column temperature to drop below 80 ℃ before removing the chromatography column to prevent damage to the column joint threads.

3、 Malfunction and Maintenance of Thermal Conductivity Detector

1The thermal conductivity signal cannot be zeroed

Possible reasons:

(1) Thermal conductivity control circuit fault, the control circuit should be checked and repaired by the manufacturer.

(2) The instrument is severely leaking, especially after the vaporization chamber, so test for leaks.

(3) The four arm rhenium tungsten wire component is severely asymmetric. After removing the solder wires of the thermal conductivity cell detector and the electrical part, measure the resistance values of the four lower arms, and the difference should be less than 0.5 Ω.

(4) There is a short circuit between one arm of the rhenium tungsten wire in the thermal conductivity pool and the pool body. The contact resistance between the rhenium tungsten wire component and the ground can be checked (the bridge line should be removed).

2The baseline is stable, but there is no peak during injection or the sensitivity significantly decreases

Possible reasons:

(1) The selection of thermal bridge flow is too small.

(2) The sealing gasket of the vaporization chamber injection port is leaking.

(3) Gas leakage occurs at the junction between the vaporization chamber and the chromatography column or from the column back to the detector.

(4) The syringe itself is leaking air, or the temperature in the vaporization chamber is too low.

(5) Rhenium tungsten wire components are severely corroded.

3Deterioration of baseline stability

Possible reasons:

(1) The control circuit of the thermal conductivity pool is faulty. Please have the manufacturer repair it.

(2) Sample or high boiling fixed liquid loss, resulting in condensation at the vent.

(3) The bridge current is too high, and the rhenium tungsten wire is in a hot state.

(4) The flow rate of the carrier gas is too high or unstable.

(5) The temperature control is unstable and should be repaired by the manufacturer.

(6) The thermal conductivity pool is contaminated and should be removed for cleaning. Please have the manufacturer repair it.

attach

Serial number, retention time, name, concentration, peak area

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1 0.652Oxygen 0.98 5100

2 1.009Nitrogen 3.74 19478

3 1.813Methane 64.42 335410

4 3.538Carbon monoxide 0 0

5 5.087Ethane 22.43 116769

6 5.918Carbon dioxide 4.69 24457

7 6.772Propane 2.83 14727

8 8.923Isobutane 0.48 2492

9 11.233N-butane 0.43 2236

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Total 100 520669

Under standard conditions (273.15K, 101325Pa):

Average molecular weight=22.282

High calorific value=45.283 (MJ/Nm3)=10815.586 (KCal/Nm3), low calorific value=41.020 (MJ/Nm3)=9797.391 (KCal/Nm3)

High calorific value Hua Bai number=51.628 (MJ/Nm3)=12331.222 (KCal/Nm3), low calorific value Hua Bai number=46.768 (MJ/Nm3)=1170.343 (KCal/Nm3)

Combustion potential=68.408

Density=0.9941 (kg/m3), relative density=0.769

Critical temperature=226.02 (K), critical pressure=4.675 (MPa)

Shanghai Chuanhao Tian Gas Detector, Component Chromatography Analyzer Station Manager Testing Tool

Shanghai Chuanhao Tian Gas Detector, Component Chromatography Analyzer Station Manager Testing Tool

Shanghai Chuanhao Tian Gas Detector, Component Chromatography Analyzer Station Manager Testing Tool