SLDA2100 Series H2SO4 Acid Dew Point Analyzer

Solidat Applied Technologies Ltd. is one of the leading manufacturers and suppliers of slda2100 series h2so4 acid dew point analyzer in China, also supports customized service. Please feel free to buy high quality products in stock here and get quotation from our factory. Good service and reasonable price are available.

 

In industrial boilers or power plant boilers, petroleum refining enterprises, heating furnaces, fossil fuels (natural gas, refinery dry gas, coal, heavy oil, etc.) are generally used. These fuels contain a certain amount of sulfur to a greater or lesser extent, and SO2 will be produced during the over-oxygen combustion process. Due to the presence of excess oxygen in the combustion chamber, under normal excess air conditions, a small amount of SO2 further combines with oxygen to form SO3, Fe2O3 and V2O5 (the flue gas and the surface of the heated metal surface contain this component). About 1~3% of all SO2 is converted into SO3. SO3 gas in high-temperature flue gas does not corrode metals, but when the flue gas temperature drops below 400℃, SO3 will combine with water vapor to form sulfuric acid vapor. The reaction formula is as follows:

SO3 + H2O -------- H2SO4

When sulfuric acid vapor condenses on the heating surface at the rear of the furnace, low-temperature sulfuric acid dew point corrosion will occur. At the same time, these sulfuric acid liquids condensed on the low-temperature heating surface will also adhere to the dust in the flue gas to form sticky ash that is difficult to remove, making the flue gas channel unsmooth or even blocked, and increasing resistance, thereby increasing the power consumption of the induced draft fan. The occurrence of corrosion and ash blocking is a hazard to the working condition of the boiler heating surface.

Since the flue gas contains both SO3 and water vapor, the two will produce H2SO4 steam when they meet, which will increase the acid dew point of the flue gas. When the exhaust temperature is lower than the flue gas acid dew point temperature, H2SO4 steam will stick to the flue and heat exchanger to form H2SO4 solution, which will corrode the equipment, causing the heat exchanger to leak and the flue to be damaged. In the device supporting the heating furnace or boiler, its energy consumption accounts for about 50% of the total energy consumption of the device, and the exhaust temperature affects the thermal efficiency of the heating furnace and boiler. The higher the exhaust temperature, the lower the thermal efficiency. For every 10°C increase in the exhaust temperature, the thermal efficiency decreases by about 1%. If the exhaust temperature is too low, if it is lower than the flue gas acid dew point temperature, it will cause equipment corrosion and cause hidden dangers to the safe operation of the heating furnace and boiler. The reasonable exhaust temperature of heating furnaces and boilers should be slightly higher than the acid dew point temperature of flue gas.

Therefore, determining the acid dew point temperature of heating furnaces and boilers is the key to improving their operating thermal efficiency and reducing operating safety hazards. At present, in combustion boilers and petroleum refining enterprises, in order to obtain the flue gas acid dew point of heating furnaces and boilers, flue gas acid dew point analyzers are generally used for monitoring.

 

● Dual-channel probe measurement: 1 acid dew point analyzer can simultaneously measure oxygen content, water dew point value, moisture content, and acid dew point value.

● Multi-channel output control: The instrument has two 4 ~ 20mA current outputs and computer communication interfaces RS232 and RS485.

● Measurement range: 0℃~200℃ acid dew point value, 1ppm~100% oxygen content, 0~100% water vapor, -50℃~100℃ dew point value, and water content (g grams/Kg per kilogram).

●Alarm setting: The instrument has 1 general alarm output and 3 programmable alarm outputs.

●Automatic calibration: The instrument will automatically monitor each functional system and automatically calibrate to ensure the accuracy of the instrument during measurement.

●Intelligent system: The instrument can communicate with humans and complete various set functions according to the preset settings.

●Display output function: The acid dew point analyzer has a strong function of displaying various parameters and has a strong output and control function of various parameters.

●Variable parameter selection: It can be selected according to different fuels (lignite, washed coal, coal powder, natural gas, blast furnace gas, heavy oil, various grades of fuel oil, etc.)

SO2 generated by different sulfur contents and the conversion rate of each fuel into SO3, and directly obtain the high-precision combustion flue gas acid dew point value of each fuel.

 

 

Display mode	32-digit English display
Alarm	1-way general alarm; 3-way general alarm
Power supply	85V~264V 3A
Correction	Automatic correction without manual adjustment
Range:Set with keyboard	0℃~200℃ acid dew point value 0~ 100% water vapor 0~100% humidity value 0~ 10000g/Kg -50℃-100℃ dew point All output ranges are adjustable
Output	2-way 4~20mA DC linear Acid dew point, water vapor, water content, Water dew point, residual oxygen 4-way program alarm relay RS232 serial communication RS485 network communication
Output full amplitude and lower limit	The full amplitude and lower limit values can be freely selected according to user requirements to achieve the highest accuracy
Accuracy, repeatability	The oxygen measurement accuracy of the instrument and probe is ±1% Repeat accuracy is +0.5%, and other measurement accuracy is calculated based on the oxygen measurement accuracy
reaction speed	Indirect heating measurement is about 3 seconds Direct heating is about 30 seconds Core probe reaction speed is 0.0001 seconds

 

Sensor Model	Heated type; High temperature non-heated type
Probe length	100mm,190mm,250mm,350mm,500mm,750mm,1000mm
Maximum operating ambient temperature	Instrument 40-60℃, 5%-95%RH
Instrument weight	3.0Kg
Reference gas connection	1/4 inch pipe thread
Reference gas flow	50CC/min
Probe cable	The maximum length of the dedicated cable with aviation plug is no more than 100 meters
Instrument size	(Width)300mmx (Height)180mmx (Thickness)100mm
Probe weight	0.6Kg plus 0.33Kg per 100mm length
Probe operating temperature	0-720℃ optional 1200 Heating controlled by analyzer
Maximum temperature of the probe junction box	130℃
Reference gas supply	Micromotor vibration air pump inside the instrument
Instrument installation method	Wall mounted, portable

 

The acid dew point analyzer measures the acid dew point temperature in the flue gas of boilers and heating furnaces in real time online. According to the measured acid dew point temperature, the exhaust temperature of boilers and heating furnaces can be effectively controlled, the low-temperature sulfuric acid dew point corrosion of equipment can be reduced, the operation thermal efficiency can be improved, the boiler operation safety can be increased, and the service life of equipment can be extended.

 

After using the acid dew point analyzer, the acid dew point value, oxygen content, water vapor (% water vapor value) or dew point value (-50℃~100℃) and water content (G grams/KG per kilogram) and humidity value RH in the flue gas of boilers and heating furnaces can be accurately known. Users can control the exhaust temperature within a range slightly higher than the flue gas acid dew point according to the display of the instrument or the 2-way 4-20mA output signal to avoid low-temperature acid dew point corrosion and increase boiler operation safety.

 

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