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ST9800CN type of Positive Pressure Explosion-proof Analysis System
The ST9800CN type of positive pressure explosion-proof analysis system (hereinafter referred to as the device) is a safety monitoring interlock device, which is specially designed & manufactured for operation and production of positive pressure explosion-proof process equipment.
Keywords:
analysis
explosion-proof
Category:
Coal chemical industry
Hotline:
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Product Overview
The ST9800CN type of positive pressure explosion-proof analysis system (hereinafter referred to as the device) is a safety monitoring interlock device, which is specially designed & manufactured for operation and production of positive pressure explosion-proof process equipment. The entire device includes five parts: A sampling probe assembly, a pretreatment unit, an analysis unit, a programmed alarm & control unit, and an instrument calibration unit. On the basis of absorbing the advantages of the most advanced similar products in the world (such as Siemens, ABB and other world-renowned companies), this device is specially designed according to the characteristics of current positive-pressure & explosion-proof purification equipment. So far this process analysis device has been successfully used in more than 30 manufacturing companies of explosion-proof purification equipment, and has achieved good economic & social benefits for those companies (our company’s customer).
Performance Indices
1. Measuring range: (Other measuring ranges can be provided in accordance with user requirements) O2: 0.01-5%/ H2: 0.01-30%/ CO: 0.01-100%/ analysis of dust in purified exhaust gas: 0-1000mg/m3 (new function);
2. Repeatability: ≤±1%F.S;
3. Accuracy: ≤±1%F.S;
4. System response time: T90＜30s (sampling tube outside the analysis cabinet＜10M);
5. Filtering precision: <0.1μm;
6. Output signal: 4-20mA;
7. Communication protocol: RS232/485 interface, standard Modbus/RTU protocol, (optional);
8. Alarm setting: The alarm can be set randomly within the range of analyzer, and the details can be determined in accordance with operating conditions;
9. Overall dimensions of the analysis cabinet: Depth × width × height = 600 × 800 × 1920mm; structural features: closed, dust-proof;
10. Normal maintenance cycle: not less than 90 days;
11. Analysis module for measuring O2 (electrochemical method);
12. Analysis module for measuring H2 (thermal conductivity method);
13. Analysis module for measuring CO (non-dispersive infrared method);
14. Calorific value analysis of positive pressure explosion protection (online analysis method for calorific value ingredients of the combustible gases);
15. Analysis of the purified dust (backscattering method of smoke particles).
Working Conditions
Operating conditions:
1. Dust content in sample gas: <200g/Nm³;
2. Medium temperature: 20~800℃;
3. Medium pressure: >-10KPa;
4. Moisture content: Suitable for saturated water vapor (heat-tracing pipeline is required for sampling gas).
Climatic conditions:
1. Ambient temperature: -25～55℃;
2. Environmental relative humidity: 20~85%;
3. Atmospheric pressure: 70~106KPa;
4. Sunlight exposure: No direct exposure;
5. Air flow rate: Direct airflow: <3m/s.
Environmental conditions:
1. There is no obvious vibration at the installation site; there is no strong electromagnetic interference;
2. Configure a dedicated ground wire (the earthing resistance is less than 2Ω);
3. No volatile, corrosive, and explosive gases;
4. Good ventilation.
Product Characteristics
1. It is equipped with a domestic first-class sampling pretreatment system so that the entire system has long maintenance cycle, small maintenance workload, simple and convenient operation as well as high reliability.
2. Utilize analysis-cabinet type (or analysis-room type) structure to accomplish the “turnkey engineering design”, thus simplify installation and trial running, and enhance system reliability.
3. It adopts dry technological process, pulse cleaning, electric heat-tracing and other technologies; and it possesses feeding sample gas automatically, continuous operation as well as control interlocking functions.
4. It adopts high-performance diaphragm air-extracting pump, which features strong anti-corrosion ability,
large air extracting capacity, high temperature resistance, high reliability, long service life and low maintenance workload.
5. It is not afraid of moisture, dust, and corrosion; it has little impact from changes in ambient temperature, and is not afraid of vibration effects; it works stably, does not need frequent calibration, and has a service life of more than five years.
6. System response time is short: The system responds quickly, each probe is equipped with a membrane sampling pump, the system response time will be less than 10 seconds when the length of sampling pipeline is less than 10 meters.
7. The operating costs is low, low maintenance workload, and the long-term working losses is almost zero.
8. It adopts an internationally fashionable standard cabinet with a structure of the opening doors on both front and back sides. There is a large glass inspection window on the main door, and the interior of the cabinet is equipped with lighting lamp so as to facilitate operator’s inspection and maintenance.
System Composition
The online analysis system comprises a sampling system, a pretreatment system, a calibration system, an online analyzer, a sub-cabinet and its public utilities etc.
Application Areas
This device is suitable for calorific value analysis at each monitoring point in positive pressure explosion-proof process as well as automatic analysis & monitoring of H2, CO and O2 contents, thereby ensuring operation safety of the above processes. The device can continuously measure at one point, it is also able to perform multi-point automatic patrolling detection according to user’s requirements.
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