Switchable two-stage coalescence separation system

Abstract

The present invention is a switchable two-stage coalescing and separation system, which includes a coalescer housing, a plurality of dual-stage filter elements and particle detectors. The inside of the coalescer housing is divided into a lower chamber and an upper chamber. The lower part and the upper part of the first-stage filter element are respectively located in the lower chamber and the upper chamber; the first air intake branch pipe and the second air intake branch pipe are respectively connected with the lower chamber and the upper chamber connected to the main intake pipe respectively, the first multi-way valve is arranged at the connecting position of the main intake pipe, the first air intake branch pipe and the second air intake branch pipe, and the particle detector is arranged on the main intake pipe; the first air outlet branch pipe and the second air intake branch pipe The second air outlet branch pipes are respectively connected with the upper chamber, the first air outlet branch pipes and the second air outlet branch pipes are respectively connected to the air outlet main pipe, and the second multi-channel is arranged at the connection position of the air outlet main pipe, the first air outlet branch pipe and the second air outlet branch pipe. valve. The invention solves the technical problems that the coalescing filter core is easy to block and the coalescer has poor use effect.

Description

technical field [0001] The invention relates to the technical field of natural gas transportation, in particular to a switchable two-stage coalescence separation system. Background technique [0002] At present, pipeline transportation in natural gas transportation technology is the optimal way to realize the long-distance transfer of a large amount of oil and gas resources. In order to achieve long-distance transportation, it is necessary to set up a compressor station along the pipeline to pressurize the natural gas. The core power equipment of the compressor station is a compressor. However, the natural gas extracted from the ground will entrain some minerals, clay, water, condensate and other impurities to varying degrees. If solid particles or liquid droplets enter the compressor, it will cause wear, corrosion or thermal strain on the blades or dry gas seal system, which will cause the compressor to shut down in severe cases. [0003] In order to ensure the long-term ...

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Problems solved by technology

[0009] 1. The coalescer is mainly used to remove liquid droplets with a particle size below 1 μm. The treatment of solid particles is not considered in the design process. However, the dust and liquid content in the gas fluctuates greatly under actual on-site working conditions. When the gas contains When there is a high concentration of sub-micron solid particles, it is easy to cause blockage of the coalescing filter element, causing a sharp increase in pressure drop and a significant increase in system energy consumption. If the filter element is replaced frequently, not only the use cost is high, but also the continuous operation of the coalescer have an impact

[0010] 2. At this stage, almost all coalescers are placed vertically in actual industrial production, and the internal filter element is single-stage (only one-time filtration of gas). When the concentration of liquid droplets in the gas exceeds the maximum coalescence filter element When the processing capacity is high, the filter element will be saturated in a short time, shortening the service life of the filter element

[0011] 3. For the coalescing filter element in the double-stage horizontal coalescer, the filter material in the area below the horizontal centerline of the filter element will be fully infiltrated by the liquid after long-term operation, and the coalesced liquid cannot be discharged from the filter element in time, which makes the fiber intercept droplet ability drop and secondary entrainment of droplets occurs, resulting in a significant reduction in filtration efficiency

[0012] 4. The filter elements in various coalescers are for one-time use. Once the pressure drop is too large, the entire filter element needs to be replaced, which cannot be reused, resulting in a significant increase in use costs

[0014] Aiming at the problem that the coalescing filter element is easy to block and the coalescer is not effective in the related technology, no effective solution has been given so far

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