Industrial Safety Gas Detection Solutions Series

Therefore, in order to better realize the precise monitoring and control of carbon dioxide content in natural gas, the current more China petroleum co., LTD has introduced Zetron online carbon dioxide analyzer and TH2000-C-CO2-A-H, with its high precision measurement technology and real-time online monitoring function, quickly and accurately detect the carbon dioxide content in natural gas. In this way, enterprises can find and deal with the problem of excessive carbon dioxide content in time, to ensure the stability and environmental protection of the production process. This will not only help to reduce the possibility of accidents, but also to improve the production efficiency and economic benefits of gas enterprises.



Gas industry gas detection solutions:



1. Program background



Terminal CNPC Southwest Oil & Gas Field Branch, medium: natural gas pressure 3.3 MPa, 2.8 Mpa, normal temperature 18℃, components: CH4, C2H6, C3H8, H2S, CO2, N2, H2. Natural gas pipeline measuring CO2,0 ~ 100 PPm (adjustable)



2. Solutions



The overall equipment is of the outdoor type, Can be placed in the open air, The system is equipped with power management and protection system, detector, pumping pump, efficient condensing system, drainage system and other equipment power supply; Equipped with automatic cooling, dehumidification and constant temperature drainage system, The system is equipped with a dust filter and treatment device, Can achieve the purpose of filtering the dust and tar of the measured gas; Detection point pressure maximum of 3.3 MPa, Minimum of 2.8 Mpa, Specification of supporting customized sampling valve: belt / Class600 DN40RJ HG / T 20615-2009; Considering that the detection point is frozen in winter, Power distribution heating system constant temperature control system and 10 meters electric heat tracing pipeline;



3. What product is matched



On-line CO2 analyzer, TH2000-C-CO2-A-H



Dual-stage electronic condensation dehumidification system, power management and protection system, fine dust filtration sampling head (flange installation), long life brushless pump sampling distance of 40 meters, automatic cooling, peristaltic pump drainage, filter tar, reserved manual back interface, sample gas temperature within 600 degrees; suitable for high water vapor, high temperature, the detection and analysis unit is not very high; pump suction detection; with explosion-proof external box;



Detection gas: carbon dioxide CO2; detection range / detection rate / detection principle:



CO2:0-100PPM, 0.01PPM; Imported long life, high precision, high performance, long light range infrared principle sensor;



Concentration unit, display mode, Chinese and English operation interface, 7 inch touch screen operation, import sensor; three wire / four wire system 4-20ma signal + RS485 + relay output;



 Large capacity data storage function (standard 100,000 pieces, larger customizable); multi-mode alarm function, logging function; detector explosion-proof grade: ExdⅡCT6; sampling valve specification: belt / Class600 DN40RJ HG / T 20615-2009; contact medium part is 316 / 304 stainless steel; power distribution heat tracing system and 10 m electric heat tracing pipeline;













In short, through the application of Zetron online carbon dioxide analyzer, it can not only provide reliable products and solutions, but also help gas enterprises to achieve safe production and efficient operation, so as to improve the market competitiveness of enterprises. In the future, Zetron will continue to uphold the concept of professional and innovation, bring more high-quality and efficient solutions to the gas industry, and promote the sustainable development of the whole industry.

Portable gas detectors, as an important tool for modern industrial safety and environmental monitoring, mainly detect gas concentrations in the air through built-in sensor technology. Whether a portable gas detector can work properly in a strong electromagnetic interference environment depends on the design and performance of its anti-interference ability. Generally speaking, high-quality portable gas detectors usually have strong anti-interference capabilities and can resist strong electromagnetic interference to a certain extent, thereby ensuring normal operation. So can portable gas detectors work properly in a strong electromagnetic interference environment? The following is the sharing of the editor of Zechuan Technology.








First, the shells of these detectors are usually made of impact-resistant and anti-electromagnetic interference materials to protect the internal circuits and sensors from external interference. At the same time, the internal circuits of the instrument are also specially processed to enhance its ability to resist electromagnetic interference.








Secondly, some advanced portable gas detectors are also equipped with electromagnetic shielding technology to further reduce the impact of electromagnetic interference on the detection results. These technologies can effectively reduce electromagnetic noise and improve the stability and accuracy of the detection signal.







However, even with strong anti-interference capabilities, it cannot guarantee that the portable gas detector can work completely normally in all strong electromagnetic interference environments. Therefore, when selecting and using a portable gas detector, the specific use environment and electromagnetic interference should be considered.








In order to reduce the impact of electromagnetic interference on portable gas detectors, the following measures can be taken:








1. Choose a detector with strong anti-interference ability: When purchasing a portable gas detector, choose products that are certified, reliable and have strong anti-interference ability.








2. Understand the use environment: Before use, fully understand the electromagnetic interference of the use environment in order to choose a suitable detector and take corresponding protective measures.








3. Reasonable installation and use: Follow the instructions of the detector to correctly install and use it, and avoid placing the detector near a strong electromagnetic interference source.








4. Regular maintenance and calibration: Regularly maintain and calibrate the detector to ensure that it is in good working condition.








In summary, whether a portable gas detector can work normally in a strong electromagnetic interference environment depends on the design and performance of its anti-interference ability. By choosing a detector with strong anti-interference ability, understanding the use environment, reasonable installation and use, and regular maintenance and calibration, the impact of electromagnetic interference on the detector can be reduced, thereby ensuring its normal operation. At the same time, with the continuous advancement of technology and the continuous expansion of application scenarios, we have reason to believe that future portable gas detectors will have stronger anti-interference capabilities and provide more solid protection for people's life safety and health.

With the intensification of air pollution and the continuous improvement of people's awareness of environmental protection, the haze problem has aroused widespread concern. Ammonia can directly participate in and accelerate the formation of ammonium salts in the atmosphere, which also contributes to the formation of haze particles in the atmosphere. Plays a vital role.



Regarding the formation of ammonium sulfate in the atmosphere, the traditional view is that sulfur trioxide (SO3) first reacts with water to form sulfuric acid, and then further reacts with ammonia gas (NH3) to produce ammonium sulfate. However, the study found that ammonia gas can directly participate in the reaction of sulfur trioxide and water.




In the simulation experiment, the process of spontaneous reaction of ammonia molecules and sulfur trioxide molecules in water clusters to form ammonium bisulfate (NH4HSO4) was directly observed. During the reaction, ammonia gas and sulfur trioxide form a special ring structure with water clusters. The formation of this ring structure greatly promotes the transfer of hydrogen atoms in water molecules to ammonia molecules, thereby forming ammonium ion. At the same time, hydroxide radicals quickly combine with sulfur trioxide molecules to form hydrogen sulfate radicals. Through further reaction transition state search, the reaction path was confirmed. 








They found that the presence of the third water molecule in the three-molecule water cluster helped the formation of the ring structure, and the ring structure could reduce the reaction energy barrier to almost It is zero, which greatly increases the formation rate of ammonium bisulfate in atmospheric water clusters.




At present, in the formation of PM2.5, everyone pays more attention to primary particulate matter, sulfur dioxide, nitrogen oxides, and volatile organic compounds. However, relevant experts pointed out that ammonia gas actually plays an important role in the formation of PM2.5.



Research based on the formation mechanism of ammonia gas in PM2.5 is continuously disclosed. In the future, in the process of smog treatment, measures to carry out large-scale ammonia gas detection to control ammonia gas emissions may receive more and more attention. At present, the main principles adopted by the ammonia gas detector are chemiluminescence method, TDLAS, electrochemical method, infrared method, etc. The related instruments involved will have more demand in the environmental protection industry.

About high efficiency filter leak detection: For food and drug manufacturers, high efficiency filter leak detection refers to the on-site leak detection after the installation of high efficiency filter and its system, mainly to check the small pinholes and other damages in the filter material, such as frame seal, gasket seal and leaky seams on the filter frame. The purpose of leak detection is to check the sealing of the high efficiency filter and its connection parts with the installation frame, find the defects in the high efficiency filter itself and in the installation in time, and take corresponding remedial measures to ensure the cleanliness of the area. Whether there is leakage. The purpose of dust generation is that the dust concentration upstream of the high efficiency filter is low, so if a particle counter is used to detect the leak without dust generation, it is difficult to detect the leak, and additional dust generation is needed to obviously and easily detect the leak.











Standards






FED-STD-209E, Par. 50 Federal Standard (Cleanroom and Workstation Requirements)



AACC, CS- 1T American Association for Contamination Control (Standard for High Efficiency Filters)



AACC, CS-2T American Society for Contamination Control (Laminar Flow Clean Air Installation)



AACC, CS-6T American Society for Contamination Control (Clean Room Testing and Certification)



IES, RP-CC-001-3 Institute of Environmental Science (High Efficiency Filters)



IES, RP-CC-002-86 Association for Environmental Science (Recommended Approach for Laminar Flow Clean Air Installations)



IES, RP-CC-001-2 Environmental Science Society (Test Clean Room)



NSF, STD No.49- 1992 National Sanitation Foundation (Secondary Laminar Flow Biological Safety Cabinet)



ANSI, N101.1-1972 American National Standards Institute (Efficiency testing of air cleaning systems with filters)



ANSI/ASME, N5101.198 American National Standards Institute/American Society of Mechanical Engineers (Testing of Nuclear Air Cleaning Systems) NEBB National Environmental Balance Agency (Standard for Clean Room Certification Test Procedures)













Product Information 



1.Aerosol photometer PM-350














【Feature】



* The host adopts 5-inch color touch screen, easy to operate and faster data processing



* Intuitive display of leakage rate and pump sampling speed and other data



* Portable scanning probe, 3.5-inch color display, one-touch operation, synchronous display with the host interface, convenient for users to observe the test results



* Automatic switching upstream and downstream



* To ensure reliable and stable data, imported air pump and light source are used



 



【Parameter】







Data display range 





0.0001%-100.0% Multi-color LCD display







Dynamic range





0mg/m3～120mg/m3







Accuracy





1%（ 0.01% to 100%）







Flow control





1cfm（28.3L/min）±10%







Alarm 





When the preset limit value is exceeded, 2 modes of audible and visual alarm can be selected







Aerosol type





 PAO, DOP, DEHS and other multi-dispersion







Standards





NSF49、IEST、ISO14644、EN61010-1：2010、EN61326-1:2006







Power





AC 220V  50/60Hz







Dimension





258cm（L）x178cm（W）x360cm（H）







Weight





9.8kg














2. Aerosol generator HRF-4B (cold)



 



【Features】

* Laskin Nozzle dust production method



* Adjustable manually



* Large capacity loading dust production



【Parameter】








Airborne suspended particle output 





range 50 - 8,100 cubic feet per minute (1.4 - 229 m3min)







Suspended Particle Concentration 





100 µg/L at 810 cfm flow rate







Suspended Particle Concentration 





10 µg/L at 8100 cfm flow rate







Generation type





1 to 7 Laskin nozzles







Compressed air





3 to 18 cubic feet per minute at 20 psi flow







Particle generation





PAO、DOP、polydispersed







Type





 Multiple particle diameters (cold)







Dimensions





25cm（L）X 28cm（W）X23cm（H）












3. Aerosol generator HRF-5C (Hot)





 



【Feature】

HRF-5C is a more user-friendly enhanced aerosol generator, its oil circuit insurance supply system and thermal cut function in the current market belongs to the higher grade of the security system, suitable for certification, HEPA performance test and installation. Need to use inert gas, suitable for AC220v±10%50HZ power supply.



 



【Parameter】








Usable flow rate range 





1,500-65,000cfm(42-1,839.5m3/min)







Occurrence concentration





10ug/L：flow rate65,000cfm( at approx 1839.5m3/min)







100ug/L：flow rate 6,500cfm(at approx183.95m3/min)







Particle generation





PAO、DOP、polydispersed







Generation method 





Heating generation







Compressed gas (inert) 





Nitrogen,Argon,Carbon Dioxide或Helium (50psi))







Power supply





AC220～240VAC,50/60HZ







Dimension





280×390×300mm







Weight





14kg








When applying a pressure of 20psi (0.14Mpa) Note: DOP is not recommended



 



4.Aerosol generator performance comparison table









Model





HRF-4B





HRF-5C







Picture











 













 








Principle





Cold generation





Hot generation







Gas source 





Compressed air 





Inert gas







Gas source pressure 





0.4-0.8mpa





50psi







Dust





PAO





PAO







Power





No





AC220～240VAC,50/60HZ








Note: Heating occurs when oily particles are heated and evaporated and then blown into the system air inlet by inert gas, suitable for the end of the whole air conditioning system for high efficiency filter detection, the advantage is that the whole system only needs a place to produce dust , after the filter upstream concentration is stable, you can test the filters one by one, reducing the time of frequent change of dust production points and debugging dust concentration, also saves the PAO oil for debugging. The disadvantage is that there should be a long section of mixed cold generation ten times the diameter of the air duct, which is not suitable for local FFU units without air supply duct at the top, and not suitable for single biosafety cabinets and clean benches.



Cold generation is made of compressed air and pressurized PAO oil, which is sprayed by Laskin nozzles, and the working number of nozzles is used to adjust the size of dust concentration, which is suitable for local FFU units and clean benches of biosafety cabinets without air supply ducts. There is no thermal occurrence of the convenience, there are also air conditioning systems because of the inconvenience of segmentation detection, and can not use this type of dust generation small amount of dust generation instrument.