Regarding alkali dust gas analyzers
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Are there any automatic analysis instruments used in the soda ash industry to measure the amount of alkaline dust in test gases? Are there any other testing methods? If any of you sailors have used it, please share more details so that everyone can learn from it!* ! ! !
I’ve heard that some soda ash manufacturers have used this technology, but it’s applied at the inlet of large compressors for on-line monitoring of the dust level there. It operates on the principle of contactless charge detection: dust particles in the pipeline acquire charges due to friction and collisions, and this results in an extremely weak PA (picoampere) current being generated by the dust sensor. This PA current signal is amplified specially to produce a 4-20mA signal that is proportional to the amount of dust present. I’m not sure if the original poster needs this information. As for the alkaline-containing dust mentioned by the poster, the dust measurement devices available on the market, regardless of their working principle, rely on physical detection methods and are unable to determine whether the dust is acidic, alkaline, neutral, or of some other nature.
Reply to 2# nzg_801: Could you tell me which alkali plant uses it, and which company manufactured it? Thank you
I remember it was the Lianyungang Alkali Plant, produced by Babylone in the United States
Reply to 4# nzg_801: Thank you so much!
Take a look at this product from Hanghe Electric: the dust analyzer. See if it can measure the amount of alkaline dust in the air as you mentioned. There are also air pollution control systems, such as bag filters and electrostatic precipitators, which are used to remove particles or dust from the airflow before it is released into the atmosphere. To keep the dust concentration in the exhaust gases below a specified level through the effective operation of the control system, it is necessary to continuously monitor the dust concentration in the exhaust gases. Building on the installation and operation experience with the existing DT400G model, the DT450G dust detector, designed using a microprocessor, offers higher operability and reliability. Its features include one-key automatic range setting in response to process conditions, as well as automatic drift compensation. Furthermore, the DT450G can measure at process temperatures up to 250°C, making it suitable for various applications. Features: Drift compensation; capable of direct measurement at a maximum process temperature of 250°C; one-button automatic range setting based on process conditions; electrostatic detection method, with probes that are resistant to contamination and require minimal maintenance; integrated design for easy installation; long-term maintenance-free operation.
Specifications: Measurement target – solid particles in gases; Particle size – 0.3µm and above; Measurement range – 0.1mg/m³ to 1kg/m³; Measurement principle – electrostatic detector; Process conditions – Temperature: below 250°C; Pressure: below 200kPa; Gas flow rate: above 4m/s (maximum flow rate of approximately 30m/s); Humidity: below 40%RH; Range setting – one-button automatic setting or manual setting; Note: The one-button automatic setting function can be used to set the measurement range so that the dust concentration in the process reaches the desired setpoint. In manual setting, the measurement range is determined through gains (x1, x10, x100, x1000, x10000). Set range: DT450G-1: Fixed value (20%) DT450G-3: Variable (10–50%, 10% step size). Analog output signal (DT450G-3): 4–20 mA DC (isolated, with a load resistance of 500 Ω). Contact output signal: 2 outputs. Environmental conditions: Temperature: –20–45°C; Humidity: Below 95% RH (no condensation); Vibration: Below 5 m/s² (0.5G). Structure: Integrated sensor and converter; plug-in type, weatherproof (IP64). Materials: Sensor probe: Stainless steel (equivalent to JIS SUS316); Sensor insulation: PEEK; Housing: Aluminum. Power supply: 100–120 V AC or 200–240 V AC, 50/60 Hz, 8 VA. Air supply: Instrument air (dry air). Process pressure: Above +50 kPa (continuous). Connection: Rc 1/4. Air consumption: Approximately 50 Nl/min. Weight: Approximately 2.3 kg (excluding flanges). Applications: Electrostatic precipitators in boilers, incinerators, and cement kilns. Bag filters in coal powder plants, granulation plants, sugar factories, and milk powder factories. 1
Specifications: Measurement target – solid particles in gases; Particle size – 0.3µm and above; Measurement range – 0.1mg/m³ to 1kg/m³; Measurement principle – electrostatic detector; Process conditions – Temperature: below 250°C; Pressure: below 200kPa; Gas flow rate: above 4m/s (maximum flow rate of approximately 30m/s); Humidity: below 40%RH; Range setting – one-button automatic setting or manual setting; Note: The one-button automatic setting function can be used to set the measurement range so that the dust concentration in the process reaches the desired setpoint. In manual setting, the measurement range is determined through gains (x1, x10, x100, x1000, x10000). Set range: DT450G-1: Fixed value (20%) DT450G-3: Variable (10–50%, 10% step size). Analog output signal (DT450G-3): 4–20 mA DC (isolated, with a load resistance of 500 Ω). Contact output signal: 2 outputs. Environmental conditions: Temperature: –20–45°C; Humidity: Below 95% RH (no condensation); Vibration: Below 5 m/s² (0.5G). Structure: Integrated sensor and converter; plug-in type, weatherproof (IP64). Materials: Sensor probe: Stainless steel (equivalent to JIS SUS316); Sensor insulation: PEEK; Housing: Aluminum. Power supply: 100–120 V AC or 200–240 V AC, 50/60 Hz, 8 VA. Air supply: Instrument air (dry air). Process pressure: Above +50 kPa (continuous). Connection: Rc 1/4. Air consumption: Approximately 50 Nl/min. Weight: Approximately 2.3 kg (excluding flanges). Applications: Electrostatic precipitators in boilers, incinerators, and cement kilns. Bag filters in coal powder plants, granulation plants, sugar factories, and milk powder factories. 1
Take a look at this product from Hanghe Electric: the dust analyzer. See if it can measure the amount of alkaline dust in the air as you mentioned. There are also air pollution control systems, such as bag filters and electrostatic precipitators, which are used to remove particles or dust from the airflow before it is released into the atmosphere. To keep the dust concentration in the exhaust gases below a specified level through the effective operation of the control system, it is necessary to continuously monitor the dust concentration in the exhaust gases. Building on the installation and operation experience with the existing DT400G model, the DT450G dust detector, designed using a microprocessor, offers higher operability and reliability. Its features include one-key automatic range setting in response to process conditions, as well as automatic drift compensation. Furthermore, the DT450G can measure at process temperatures up to 250°C, making it suitable for various applications. Features: Drift compensation; capable of direct measurement at a maximum process temperature of 250°C; one-button automatic range setting based on process conditions; electrostatic detection method, with probes that are resistant to contamination and require minimal maintenance; integrated design for easy installation; long-term maintenance-free operation.
Specifications: Measurement target – solid particles in gases; Particle size – 0.3µm and above; Measurement range – 0.1mg/m³ to 1kg/m³; Measurement principle – electrostatic detector; Process conditions – Temperature: below 250°C; Pressure: below 200kPa; Gas flow rate: above 4m/s (maximum flow rate of approximately 30m/s); Humidity: below 40%RH; Range setting – one-button automatic setting or manual setting; Note: The one-button automatic setting function can be used to set the measurement range so that the dust concentration in the process reaches the desired setpoint. In manual setting, the measurement range is determined through gains (x1, x10, x100, x1000, x10000). Set range: DT450G-1: Fixed value (20%) DT450G-3: Variable (10–50%, 10% step size). Analog output signal (DT450G-3): 4–20 mA DC (isolated, with a load resistance of 500 Ω). Contact output signal: 2 outputs. Environmental conditions: Temperature: –20–45°C; Humidity: Below 95% RH (no condensation); Vibration: Below 5 m/s² (0.5G). Structure: Integrated sensor and converter; plug-in type, weatherproof (IP64). Materials: Sensor probe: Stainless steel (equivalent to JIS SUS316); Sensor insulation: PEEK; Housing: Aluminum. Power supply: 100–120 V AC or 200–240 V AC, 50/60 Hz, 8 VA. Air supply: Instrument air (dry air). Process pressure: Above +50 kPa (continuous). Connection: Rc 1/4. Air consumption: Approximately 50 Nl/min. Weight: Approximately 2.3 kg (excluding flanges). Applications: Electrostatic precipitators in boilers, incinerators, and cement kilns. Bag filters in coal powder plants, granulation plants, sugar factories, and milk powder factories. 1
Specifications: Measurement target – solid particles in gases; Particle size – 0.3µm and above; Measurement range – 0.1mg/m³ to 1kg/m³; Measurement principle – electrostatic detector; Process conditions – Temperature: below 250°C; Pressure: below 200kPa; Gas flow rate: above 4m/s (maximum flow rate of approximately 30m/s); Humidity: below 40%RH; Range setting – one-button automatic setting or manual setting; Note: The one-button automatic setting function can be used to set the measurement range so that the dust concentration in the process reaches the desired setpoint. In manual setting, the measurement range is determined through gains (x1, x10, x100, x1000, x10000). Set range: DT450G-1: Fixed value (20%) DT450G-3: Variable (10–50%, 10% step size). Analog output signal (DT450G-3): 4–20 mA DC (isolated, with a load resistance of 500 Ω). Contact output signal: 2 outputs. Environmental conditions: Temperature: –20–45°C; Humidity: Below 95% RH (no condensation); Vibration: Below 5 m/s² (0.5G). Structure: Integrated sensor and converter; plug-in type, weatherproof (IP64). Materials: Sensor probe: Stainless steel (equivalent to JIS SUS316); Sensor insulation: PEEK; Housing: Aluminum. Power supply: 100–120 V AC or 200–240 V AC, 50/60 Hz, 8 VA. Air supply: Instrument air (dry air). Process pressure: Above +50 kPa (continuous). Connection: Rc 1/4. Air consumption: Approximately 50 Nl/min. Weight: Approximately 2.3 kg (excluding flanges). Applications: Electrostatic precipitators in boilers, incinerators, and cement kilns. Bag filters in coal powder plants, granulation plants, sugar factories, and milk powder factories. 1
May I ask, what is the purpose of your analysis of the amount of alkaline dust in the gas? Is it for monitoring the ambient atmospheric environment? Seeking advice!
Reply to 8# liuhewei1314521: It is mainly due to concerns over air pollution and process recovery