The natural gas filter is mainly composed of a cyclone separator, two-stage inertia demister pre-filtration and coagulation, three-stage fine filter core coagulation, and a sewage valve. Natural gas entrained with liquid and solid particles enters the tangent direction from the intake pipe. Cyclone separator.
After cyclone separation, larger droplets and solid particles are separated out. Then, after passing through the secondary demister, gas is further separated by gas, liquid and solid under inertial impact. Larger dust particles in the gas are filtered to protect the final fine filter element. The gas passes through a fine filter element (third-stage fine filtration) and solid particles with a particle size of more than 10 μm (or finer) are filtered out; tiny liquid mists with a small particle size are collected on the fine filter element and aggregated into larger ones. The droplets, under gravity, settle to the bottom of the fine filter tube. The separated liquid is discharged from each sewage outlet, and the processed natural gas is output from the outlet of the top of the filter. The device adopts the principle of mechanical separation, microfiber filtration and microporous medium coagulation growth, and has a very high dust removal and filtration precision and dehydration capability.
How it works
The natural gas first enters the feed gas chamber, and the gas first hits the support tube supporting the filter element (to avoid direct airflow impact on the filter element, causing premature damage of the filter material). The larger solid-liquid particles are initially separated and under the action of gravity. Settling to the bottom of the container (regularly drained from the drain outlet). Then the gas passes through the coalescing filter element from the outside to the inside, the solid particles are retained by the filter medium, and the liquid particles gradually agglomerate on the inner surface of the filter element due to the coalescence function of the filter medium (as shown in the figure below). When the droplet reaches a certain size, it will fall off from the inner surface due to the impact of the airflow, enter the inner flow path of the filter element, and then enter the sink material cavity. In the sink effluent cavity, the larger droplets are separated by gravity sedimentation. In addition, in the sink effluent cavity, a separation element is provided to effectively trap the droplets to prevent the entrainment of the outlet droplets. Further improve the separation effect. The last clean gas flows out of the filter separator. With the increase of the gas throughput, the particles deposited on the filter element will cause the pressure difference of the gas filter to increase. When the pressure difference rises to the specified value (read from the differential pressure meter), the filter element has been seriously blocked and should be promptly replace. The initial pressure difference of the filter separator is not higher than 20KPa and the exchange pressure difference is not higher than 100KPa.
Common faults and processing edits
1) Flange or quick opening blinds leak
During the running or boosting process, the soap solution method was used to check the leak. When the leak was discovered, the process must be switched immediately. The accidental separator must be stopped, and then the blowdown operation should be performed. The pressure can be reduced to zero before the maintenance operation can be performed.
2) The pressure difference before and after the separator increases or the flow decreases
During the operation, due to the increase of natural gas impurities or more solid particles, the pressure difference between the front and rear of the separator is increased. When it exceeds 0.1 MPa, it indicates that there is a blockage in the filter, and the filter element should be stopped and replaced in time. If more than 2 separators are running at the same time, when the flow rate of the flowmeter after a filter separator is 30% smaller than the other channels (this set value can be adjusted during operation), it indicates that the filter separator may be Plugged, need to repair or replace the filter element.