Which scheme for the gas-liquid separator is more reasonable?

Depending on the size and site conditions, it can be installed in a way that saves space; if the cover needs to be removed frequently, removing the pipes along with it is troublesome

Indeed, Option 1 is not friendly to maintenance. If the convenience of maintenance is not taken into account, are both options feasible?

All of them should be feasible; having N2 in the center would improve the airflow distribution. For measurement and installation, it’s better to have the nozzle angled downward to prevent water accumulation and blockages

It’s better to have the exhaust outlet at the center of the flange; as for other openings, it depends on the specific circumstances. If the system pressure is high, it may not be appropriate to have too many openings. Of course, the exact number must be determined through calculations. As for whether such design facilitates maintenance, that is something that needs to be considered separately – meeting the process requirements is what matters most.

This post was last edited by xlxuiin on 2023-1-30 11:51. Option 1: Place the outlet pipeline and other ports on the top large flange； My concerns are: 1. It’s not convenient to carry out maintenance and disassembly 【The DN150 diameter is indeed inconvenient】 ； 2. Can so many pipe connections be installed on the 600 flange? [There should be no problem; I’m not sure about the pressure level.] Option 2: Place the outlet pipeline and other ports on the straight cylindrical section between the screen and the top flange, by appropriately increasing the height of this straight cylindrical section. My concern is: will the lateral flow of the outlet medium affect the gas-liquid separation efficiency? 【Generally negligible】 The dimensions are not clear in the screenshot; the diameter of the container is 600. In Option 1, the distance between the screen and the top flange is 300, while in Option 2 it is 400. 【The condition for determining this value is to ensure that the medium stays in front of the filter screen for a sufficient time, allowing larger droplets to settle due to gravity as much as possible, thereby reducing the loading on the filter screen and extending the interval between filter cleaning cycles.】 Additionally, I have another question: For the separator in a wire mesh demister, is it more appropriate to install the safety valve and pressure gauge upstream or downstream of the wire mesh? 【Generally, there is no need to install pressure gauges and safety valves separately; of course, it depends on the upstream and downstream process flows – a differential pressure gauge can be installed to determine whether the filter needs to be cleaned based on the differential pressure value.】

Thank you for your patient answers. 1. The operating pressure of the equipment is 1.8 MPa, with a design pressure of 2.4 MPa. 2. According to our calculations, if the outlet pipeline is located on the top flange, then a distance of 300 between the screen and the top flange provides sufficient residence time. In Option 2, it is increased to 400, mainly to ensure a certain distance between the weld of the outlet pipeline and the top flange as well as the mesh support ring.

When calculating the residence time, is the distance from the outlet to the mesh taken into account? Why not the distance from the inlet to the mesh?

The gas outlet M2 is positioned above the demister on the side of the cylinder; the pressure gauge and safety valve remain mounted on the upper cover. These two components do not require long pipelines, and the safety valve is generally installed at the very top.

Under this pressure, the upper cover should be an elliptical head; if it’s a flat plate, its thickness would need to be very large

Due to the small diameter of this device, and the need to install access holes for removing and installing the mesh, access holes can only be provided at the top.