225-Leaf Separator: Used for the upgrading of traditional baffle separator technology in the steam at the inlet of steam turbine compression units

This post was last edited by luoli519 on 2024-3-18 at 16:35. Some domestic clients have opted for ATLAS steam turbine compressor units; they requested that steam separators be installed to purify and separate the steam entering each stage of the turbine compressors. Excerpts from the operating condition data in the separator documents provided by the manufacturer of the steam turbine compressor unit are as follows:

It can be seen from the above operating condition data table that the separator documents provided by the manufacturer of the ATLAS steam turbine compression unit lack the property data necessary for the design of the separator’s technical scheme, such as the gas compressibility factor, gas density, gas viscosity corresponding to the operating conditions, as well as the apparent density of the liquid droplets present, the viscosity of those droplets, and the surface tension of the droplets – all of which have a significant impact on separation processes. The owner conveyed ATLAS’ response, stating that any professional company specializing in dynamic separation technology possesses the technical capability to utilize its authoritative and precise dynamic separation technology calculation and configuration design system platforms to supplement such data based on the conditions specified in the documents; this is also a way of determining whether the company responsible for designing and manufacturing the separator is indeed a professional firm in this field. That makes sense too.

At the same time, the manufacturer of the ATLAS steam turbine compressor unit also carries out simple computational designs for the separators required by its units, to serve as a reference and for verification by the manufacturers of those separators. The approximate design specifications for the separator required for their units, provided by the manufacturer of the steam turbine compressor train, are shown in the attached figure below:

The vane separator is a technologically upgraded product designed to replace traditional baffle separators, and it is used for the separation and purification of steam at the inlet of steam turbine compression units. .

Furthermore, the manufacturers of steam turbine compression units also recommend that the demisters required for such units be of the “Baffle Plates” type, that is, baffle plate design. Please refer to the attached diagram file below:

This post was last edited by luoli519 on 2024-3-18 at 17:00. A separator design and manufacturing company in Hangzhou provided a gas-liquid separator that meets the requirements specified in the documents submitted by the owner’s ATLAS steam turbine compressor unit manufacturer; the relevant details are shown in the attached diagram

From the professional perspective of precise dynamics separation technology, please examine what issues exist with the gas-liquid separators provided by this separator design and manufacturing company in Hangzhou

This post was last edited by luoli519 on 2024-5-31 15:57. First of all, the technical solution was not developed using precise dynamics separation technology, nor through the configuration and design of a system platform. Based on the steam density value of 5.4 kg/m^3 indicated in the drawings, it is clear that the designers did not take into account the actual operating conditions; instead, they simply treated steam as an ideal gas and used that to calculate an ideal gas density of 5.4 kg/m^3. Since the actual operating temperature exceeds 190°C, the true value of the steam density under these conditions, as determined through precise kinetic separation techniques and through the design of the system platform, is less than 90% of the value corresponding to an ideal gas. This means that, at the same mass flow rate, the actual volume flow rate of steam is at least 10% higher than the volume flow rate calculated based on the density of an ideal gas. Since the operating pressure drop is proportional to the square of the gas flow rate, the actual operating pressure drop will be much higher than the value calculated based on ideal gas assumptions.

The last edit to this post was made by luoli519 on 2024-3-19 at 10:27. Based on the separation precision value of “8 microns” indicated in the drawings, it can be seen that the designers simply copied the general descriptions of separation precision provided by suppliers of similar separation technology devices worldwide; they did not use precise dynamic separation technology to calculate and design a system platform that could determine the actual droplet size in microns corresponding to the real operating conditions. The precision of these values is only to two decimal places. In the future, when analyzing the \"separation accuracy\" data provided by suppliers for gas-liquid separators, if that data is not precise to two decimal places, there are serious doubts about the reliability of its source – namely, whether it was calculated using advanced kinetic separation technologies and through a systematically designed platform. In such cases, it is necessary to promptly consult and verify one of the documents supporting these core technologies: the \"Calculation Report for Advanced Kinetic Separation Processes\". Otherwise, one can only rely on guessing to come up with numbers.

This post was last edited by luoli519 on 2024-3-19 at 10:37. As indicated in the drawings, with a \"total pressure drop of less than 2.0 kPa\", it is clear that the designers did not obtain a technical solution through calculations using precise dynamic separation techniques or through the configuration and design of the system platform. Based on the data indicated in the drawings, such as the pipe diameters of “Gas-Liquid Inlet A” and “Gas Outlet B” being DN400 mm, the gas flow rate of 72687.1 kg/h, and the steam density calculated based on the ideal gas assumption of 5.4 kg/m^3, it can be calculated that the pressure drop resulting solely from steam passing through “Gas-Liquid Inlet A” and “Gas Outlet B” is already over 2 kPa. Moreover, the actual volumetric flow rate of steam under operating conditions is higher than that calculated using the ideal gas assumption; adding to this the pressure drop caused by the separation components, how is it possible to state in the drawings that the overall pressure drop is less than 2.0 kPa in such an irresponsible manner?