PROCESS SPECIFICATION
During maintenace programs, for oxygene purging, one vacuum unit is considered to evacuate air (oxygene) from drums & pressure vessels which supposed to be in service.
By this system nitrogen consumption will be minimized and oxygene removal will be expedite. So, liquid ring compressor with surge drum & seperator are implemented.
There is a vacuum header which connected to compressor in one side and to the drums & vessel from another side.
The liquid ring compressor shall be desing as total recirculation to minimized water usage.
EVP have cases in Poly Butadiene II production:
In the pilot plant, which needs two closed-circle water ring compressors and one closed-cycle water ring vacuum pump system.
The following part the nominal operation parameters of the thermochemical plant:
Process parameter requirements for 1st water ring compressor units:
Process medium: polybutadiene
Inlet pressure: 1.01bar(a)
Exhaust pressure: 3.5bar(a)
Limit exhaust pressure at outlet: 4bar(a)
Inlet air volume: 966m3/h
Inlet temperature: 40 ℃
Maximum capacity of a single compressor: 1200m3/h
Material requirements: all wetted parts are made of stainless steel 304
Sealing method: double-end machine sealing with Plan 53A flushing system
Explosion-proof requirements: Ex Dii BT4
EVP model: SY-20 liquid ring compressor
Process flow chart (for reference only)
Process parameter requirements for 2nd water ring compressor unit:
Process medium: polybutadiene
Inlet pressure: 3.21bar(a)
Exhaust pressure: 5.7bar(a)
Inlet air volume: 189m3/h
Inlet temperature: 40~65 ℃
Maximum capacity of a single compressor: 360m3/h
Material requirements: all wetted parts are made of stainless steel 304
Sealing method: double-end machine sealing with Plan 53A flushing system
Explosion-proof requirements: Ex Dii BT4
EVP model; SY-6 liquid ring compressor
Process flow chart (for reference only)
Process parameter requirements of 3rd water ring vacuum pump unit:
Process medium: air
Exhaust pressure: 1atm
Inlet air volume: 1080m3/h
Ultimate pressure: 33mbar.abs
Working fluid flow rate: 2.6m3/hr
Material requirements: all wetted parts are made of stainless steel 316
Sealing method: single end face mechanical seal
Explosion-proof requirements: Ex Dii BT4
EVP model: 2BE1-203 liquid ring vacuum pump
Process flow chart (for reference only)
Below is our provided liquid ring compressor systems and liquid ring vacuum pump system
Edited by: Shanghai EVP Vacuum Technology Co., ltd
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