Pu Jieneng Hua won seven scientific and technological achievements 　　

　　Recently, the 2022 Shaanxi Petrochemical Science and Technology Award winning projects were announced
.
Pucheng Clean Energy Chemical Co.
, Ltd.
won 7 scientific and technological achievements, of which 2 won the first prize, namely olefin separation tail gas recovery, and the desulfurization system runs stably under the high humidity of the continuous flue gas emission monitoring system (CEMS)
.

　　It is reported that the company's olefin separation tail gas adopts the pre-cutting + oil absorption separation technology of Wison Engineering, and the separation of C2, C3 and methane in the pre-cutting tower adopts the propylene/propane absorption process, which saves the ethylene refrigeration compressor
.
However, because the propylene refrigerant can only reduce the temperature to -40°C at a minimum, the separation of C3 and methane is not complete, resulting in some propylene and propane carried in the fuel gas, resulting in a waste of resources
.
Through the transformation, the company uses the pressure of the exhaust gas to drive the turbine to do work without external electrical energy input, convert it into cold energy, cool the raw material gas to below -90 °C, and realize the separation of propylene/propane from the exhaust gas.
The recovery rate is over 93%
.
The technology not only reduces tail gas emissions, but also improves product yield, with significant environmental protection and economic benefits
.
The project has been running smoothly since it was put into use in April 2021.
Under full load, the average daily recovery of C3 products is about 12 tons, and the annual economic benefit is more than 18 million yuan
.

　　Pujie Nenghua boiler flue gas adopts ammonia wet desulfurization process
.
Due to the high humidity of flue gas and the unstable state of sulfur dioxide gas, the data fluctuates greatly when CEMS measures the concentration of sulfur dioxide, and when compared with manual monitoring, the measured value of sulfur dioxide has a large deviation
.
By adding a dynamic phosphoric acid titration device in the sampling probe box, the company keeps the flue gas in an acidic state in the sampling pipeline, which can effectively suppress the loss of sulfur dioxide and improve the stability and accuracy of sulfur dioxide measurement
.
After the transformation is completed, the system runs stably and the measurement data is accurate
.
When the process is adjusted, CEMS can provide reliable data parameters for process optimization operations to ensure that the concentration of sulfur dioxide in the flue gas at the chimney exhaust is within the standard requirements.
At the same time, the stable operation of CEMS reduces the frequency of instrument cleaning and maintenance, and reduces CEMS spare parts.
consumption
.
Since its operation in November 2019, there has been no abnormal fluctuation in the measured value of sulfur dioxide, and the effective upload rate has reached 99.
3%, avoiding the incident of environmental protection exceeding the standard
.