1. Scope
This document describes the trial assembly procedure for Items J12-C-02014/B Adsorbent towers’ internals for Jazan Refinery and Terminal Project.
2. Material Scope
Trial assembly shall be applied following trays.
(1) Upper Trays (Total 2 sets)
(2) Intermediate Trays (Total 22 sets)
(3) Lower Trays (Total 2 sets)
Read Also: FIELD PRESERVATION PROCEDURE | ADSORBENT TOWER INTERNAL
3. ASSEMBLY PROCEDURE OF ADSORBENT TOWER INTERNAL
Trial assembly inspection for trays shall be performed after completion of all the required inspection for each panel based on the following activities. (Refer to sample photograph below.
- The surface plate to be made of H-shape steel and adjust the level using the shim plates.
- No mock-up shell shall be used.
- All panels per bed shall be layout on the surface plate keeping the required spaces between panels.
- Only bridge piping up to 1 field welding seam for upper tray, 1s flange for intermediate tray shall be set on the panels. No flexible hose piping for intermediate tray is set.
- Piping shall be set at the final inspection for licenser and customer only. This trial installation for piping on tray is applicable for only one tray. Piping for other trays shall be controlled with dimensional inspection.
- After completion of upper side inspection, panels shall be turned over to check the lower side visual inspection.
4. ADSORBENT TOWER INTERNAL INSPECTION
During Assembly of adsorbent tower, Following point to be checked and inspected. Sample for inspection record is attached.
(1) Check Overall outside diameter and inside diameter
(2) Verify Gaps between tray panel and panel.
(3) Visual check for tray panels with screens.
(4) Make sure Marking has been done on tray panels.
Read Also: INSTALLATION OF ADSORBENT TOWER INTERNALS
FAQs about Adsorbent Tower
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What are types of absorption tower?
There are several types of absorption towers used in various industrial processes. Some common types include:u003cbru003eu003cstrongu003ePacked Bed Towers: u003c/strongu003eThese towers contain a packed bed of solid particles or structured packing material, providing a large surface area for contact between the gas and liquid phases.u003cbru003eu003cstrongu003eTray Towers: u003c/strongu003eTray towers consist of multiple horizontal trays placed at regular intervals within the tower. The liquid and gas flow through these trays, allowing for mass transfer between the phases.u003cbru003eu003cstrongu003eSpray Towers:u003c/strongu003e In spray towers, the liquid phase is sprayed into the tower, creating a fine mist or spray. The gas phase passes through this mist, promoting contact and absorption.u003cbru003eu003cstrongu003eBubble Columns: u003c/strongu003eBubble columns operate by introducing gas bubbles from the bottom of the column. The gas bubbles rise through the liquid phase, facilitating the absorption process.u003cbru003eu003cstrongu003eFluidized Bed Towers:u003c/strongu003e Fluidized bed towers involve suspending solid particles in a fluid, creating a fluidized bed. The gas passes through the bed, promoting absorption.u003cbru003eu003cbru003eEach type of absorption tower has its own advantages and is suitable for specific applications based on factors such as gas and liquid flow rates, desired efficiency, and the nature of the substances being absorbed.