Intelligent monitoring system for high and low temperature heat exchange in dilute acid concentrating process

Abstract

The invention relates to an intelligent monitoring system for high and low temperature heat exchange in a dilute acid concentrating process. The system comprises a monitoring controller, a first temperature induction module, a second temperature induction module, a storage module, a wireless transmission module, a first early warning module, a second early warning module, a display module, a login verification module and a communication module; the monitoring controller receives information, sets a temperature threshold, and emits early warning information according to the received information; the first and second temperature induction modules monitor temperatures of an air inlet and an exhaust vent of a heat exchanger; the first and second early warning modules receive alarming instructions that the temperatures of the air inlet and the exhaust vent of the heat exchanger are lower than a threshold from the monitoring controller, and raise the alarm according to the instruction; and the communication module can sends early warning information to a user in real time. According to the invention, the heat exchanger is effectively prevented from obstruction caused by that SO2, SO3 and water vapor form a condensing acid and solid scales, and industrial production is safe, stable and efficient.

Description

technical field [0001] The invention belongs to the field of chemical production monitoring, and in particular relates to an intelligent monitoring system for high and low temperature heat exchange in the concentration process of dilute acid. Background technique [0002] At present, in the high-temperature pyrolysis sulfuric acid production process technology used in the concentration of dilute acid, the waste acid is cracked at 105-1100°C by burning natural gas or propane; the air used in the cracking furnace is the high-temperature gas discharged from the cracking furnace The gas that undergoes heat exchange through the heat exchanger, the components in the furnace gas include: SO2, SO3, water vapor and solid particles. [0003] However, the existing technology has the following defects: the temperature of the high-temperature furnace gas is about 650°C, and the air blowing by the air fan is about 25-35°C at room temperature. The temperature difference between hot and co...

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Problems solved by technology

[0003] However, the existing technology has the following defects: the temperature of the high-temperature furnace gas is about 650°C, and the air blowing by the air fan is about 25-35°C at room temperature. The temperature difference between hot and cold on the heat exchanger wall is large, SO2, SO3, and water vapor are easy to form condensed acid, and solid particles are also easy to contact with water vapor to cause fouling, which leads to blockage of the heat exchanger and corrosion of the heat exchanger, which seriously affects safety. , stable and efficient production, the defects in this high-temperature pyrolysis sulfuric acid production process have always been difficult problems in the industry. However, corresponding measures have also been taken in the industry, mainly using steam heating to preheat the air. However, there is no monitoring of the intake air temperature of the heat exchanger heated by steam, and the heat exchange situation in the heat exchanger cannot be known in real time, which seriously affects industrial production and makes the production cost of the enterprise higher

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