What should be paid attention to during the replacement of natural gas filter elements? come and see

Gas filter is suitable for gas-liquid and liquid-solid separation of natural gas, artificial gas and other non-corrosive gases, such as nitrogen, carbon dioxide, propane, butane, etc. , distributing station, pigging station, terminal station and various application fields necessary separation and purification equipment components, which can effectively filter the dirt in the pipeline and the debris peeled off the pipe wall to ensure the safe operation of gas transmission and gas equipment. Meet the quality requirements of pipeline transportation and users for natural gas.

During the transportation of gas pipelines, gas source impurities and pipeline mechanical impurities will affect the quality of gas transmission and damage some equipment such as metering and pressure regulation on the pipeline. Therefore, gas filtration equipment must be installed in front of each receiving station or important equipment. , to ensure the safety of downstream equipment (sometimes may have to go through multiple stages of filtering). The filter element is the main component of these filtering equipment, so the selection of the filter element directly affects the filtering effect. According to the unique properties of the gas, stainless steel metal mesh is selected as the main filter material, and the filter area of the filter element is increased through the folded wave structure to ensure that the gas passes through. Good circulation, while increasing the dirt holding capacity. Asbestos pads resistant to high temperature and low temperature are used as the sealing material to ensure good sealing of some low temperature gases such as compressed liquefied petroleum gas. The filter element should be cleaned or replaced in time according to the change of pressure difference during use.

So, do natural gas filter elements need to be replaced during use? What should be paid attention to during the replacement process? Let the editor explain to you one by one.

Q: Why should the natural gas filter element be replaced during use?

A: Since the natural gas filter element will inevitably be damaged during long-term use, or during installation and handling, it is necessary to take protective measures in time to prevent the occurrence of bumps. Especially after we have used it for a period of time, there will inevitably be a lot of dust or impurities accumulated inside the natural gas filter element, which will seriously affect the cleanliness of the natural gas filter element. At this time, the natural gas filter element needs to be replaced.

In addition, as the natural gas filter continues to be polluted, the gas flow rate in the system will decrease and the pressure drop will increase. At the same time, energy consumption will also increase, resulting in increased operating and production costs, and an increase in the burden on the environment.

Q: How to determine the replacement cycle of the natural gas filter element?

A: The replacement cycle of the natural gas filter element needs to be determined according to the use of the natural gas dehydration device. Generally speaking, if the pressure exceeds 0.68kgf/cm2, the pointer of the differential pressure gauge points to the red area and needs to be replaced. When the natural gas dehydration device is used in the urban pipeline network gas, it is generally recommended to replace the natural gas filter element every 6 months; if it is used in the oil field coalbed methane, it is recommended to replace the natural gas filter element every 3 months, because in the oilfield coal seam There are a lot of oil and other impurities in the gas, which can easily block the natural gas filter element.

Natural Gas Filter

Precautions during replacement

1: Special attention should be paid to the use of natural gas filter elements. Before starting maintenance, it is necessary to close the on-off valve and release the pipeline pressure slowly, otherwise it may cause dangerous accidents;

2: Cleaning should be carried out in a clean environment to prevent secondary pollution and prevent the supporting frame from rusting;

3: Pay attention to the uniform force when taking the filter element, so as not to damage the connecting thread by improper force, which will be very troublesome;

4: Before reinstalling the filter element, be sure to check the position and wear of the sealing ring. It must be strictly sealed to ensure that there is no leakage.

Natural Gas Filter

Replacement steps

1. Close the switch valve to prevent air leakage;

2. Open the exhaust hole to discharge the waste inside;

3. When there is no more dirt inside, open the filter housing;

4. Take out the original filter element and replace it with a new one;

5. Apply an appropriate amount of lubricant on the filter housing, then install it, fix the filter element and check it.

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