Sirsalliyan Small Air Compressor

Line Filter

City Gas Transmission And Distribution System In The Transformation Of The Filter

Abstract: The increased filtration area, to increase a coarse filter such as the original counter-flow filter to transform and improve the filtering effect, reducing the labor intensity, easy to operate.

In city gas transmission project construction, and extend equipment life and ensure the normal operation of transmission and distribution equipment, to ensure stable gas supply for pipeline to filter impurities measures. Because of different temperament, different filters used, the filtering effect of the gas are also different. Tianjin Gas Group Weiguo Road, High pressure gas distribution station, using the anti-flow filter.

Since November 2000 has been put into production, due to poor temperament, debris more dust, filters often block even serious damage and affect normal operation of the station. Filter cartridges have occurred because of damage caused by debris impact booster shell perforation leaks and other faults. Repair and maintenance cleaning, filter replacement filter frequency high, labor intensity, replace the filter costs are high, a filter of about 1,200 yuan. We had to install the filter cartridge taken measures to strengthen the board, but still can not solve the fundamental problem. To this end, we conducted a reform of its. Reform measures

1 For the above, the following six aspects of the filters are modified, the whole transformation process line filter manufacturing practice, transformed the structure of filters shown in Figure 1.

(1) increase the filter area Because gas contains impurities, the first approach to increase the filter area to improve the filtering effect, that increase the filter size and increase the filter to increase the number of filter area. At the same time increase the diameter of the filter tube, reducing the gas flow rate.

Transform filter before the filter area of 0.9m ², after transforming the filter area of 6m ², about 6.67 times the size of the original filter. Stainless steel wire mesh used for the 100 project, its porosity is about 44%, the use of double stainless steel filter, press the porosity rate of 20% of the filter net filter area of 1.2m ², cross-sectional area of pipe to 0.032m ², filter filtration area of pipe cross-sectional area of 37.5 times the flow rate so low in the filter Department, which greatly improve the filtering effect of the filter.

(2) increase in a coarse filter

The bottom of the filter tube close to the Head of a struggle to install a cone-shaped, while the direction of change to the intake down, struggle to align the top of taper, so that gas from the inlet into the filter downward movement along the conical hopper, when the flow to the cone-shaped bucket root, the major impurity particles due to inertia ring sewn into the conical hopper through the bottom of the head, the change in the direction of gas is to continue along the tube wall after the upward flow of the above fine filter cartridge again, from the exit out to complete the filtration process. Impurities such as sediment at the bottom of the bucket is covered with conical, and the bottom of the gas flow rate is small, the following impurities will not again be rolled up and into the upper air filter.

(3) to expand the diameter sewage outfall

The bottom of the filter tube to increase volume in order to increase storage space impurities. General filter for the DN15 mm outfall or DN25mm, to solve the impurity particles larger issue of the blocked outfall will outfall into DN50mm or under the amount of space to allow further amplification.

(4) installation of differential pressure meter

Take in the import and export filter differential pressure meter installation pressure point, to show the degree of filter clogging filter, differential pressure meter by reading the data to decide whether to take apart and wash and change, to understand the operational status of the filter , thus preventing the situation of filter to be crushed, while reducing maintenance demolition strength.

(5) use of clean filter cleaning

Gas exports in the filter settings of a valve that can be connected to the high-pressure side, the introduction of gas from the high pressure side of filter to purge the opposite direction, this process requires the filter to cut off pipeline valves before and after, access to high-pressure gas after the valve is opened to discharge the impurities adsorbed on the filter washed down, and discharged through the drain valve. Operation, the sewage discharge valve should be open instant closed after a number of impurities, after successive intermittent sewage, filter impurities will be removed.

(6) installation of hoisting equipment disassembly

Filter should always open on the Gein, cleaning and replacement of filter, so this install lifting equipment to reduce the operator's labor time and reduce labor intensity.

2 Operating Results Through the transformation of the filter, the filter can transformed over the impurity, impurity particles, and other major adverse environmental conditions show strong advantages. But this method is simple and less transformation costs, easy to implement.

After transformation, filters, since the March 2003 test run so far, a number of sewage daily extended from 2 to 4 times per month, there is no damage to the filter, a voltage regulator to ensure normal and stable operation, and reduced labor strength, ease of operation, economic returns.

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