In chemical process industries you can find vessel MOC of Mild Steel, Stainless Steel, Inconel, Hastelloy etc. Material of construction depends on the fluid corrosive properties, erosive nature for handling slurries & solid catalyst suspension, operating temperature and pressure. As you can see in sketch a vessel can be divided in different parts like Main Shell, Dish Ends, Nozzle Flanges, Nozzle Pipes, Support, Nuts & Bolts, Gaskets, etc. In this section we provide the information regarding MOC of various part of the vessel. The various information we provide in sketch includes vessel type, Jacked or limpet coiled, nozzles with location, support type, agitator type, etc. This information helps user to understand the geometry and installation details. You should provide schematic drawing of the jacketed vessel. This joint efficiency we consider for non-critical services. Among these 70% is the lowest joint efficiency and in this case vessel thickness is minimum. Joint efficiency for critical equipment should be 100%, while for other moderate and non-critical services it can be 85% and 70% respectively. Also, details of joint efficiency and radiography should be provided. Other than this you need to mention stress reliving requirement codes, if required.
REACTOR AGITATOR DESIGN CODE
You need to mention the vessel design code like, ASME or GEP (Good Engineering Practices). Other mechanical data includes, empty and filled weight for the agitated reactor. You need to mention thickness for shell, jacket and dish ends however, fabricator can also calculate this based on your operating data. Various mechanical data comprises, corrosion allowance (around 1.6mm for MS and Nil for SS), insulation thickness & type. Also, we should mention details for jacket/limpet coil dimension as well. As a thumb rule, we consider 80% working volume of the total vessel volume. Provide the total volume and working volume for the vessel. Here TL means tangent line point of the dish end. Other process parameter includes vessel diameter and TL-TL height or length. As we need baffles to create better turbulency inside the vessel during agitation. Moreover, we need to provide numbers of baffles required and its dimensions. Apart from this we need to mention equivalent hydrotest or pneumatic test pressure for the vessel and jacket/Limpet Coil side. This information includes like, fluid details (i.e., composition), fluid density, operating pressure & temperature, design pressure & temperature. In this section you need to mention operating and design data for the vessel and jacket/Limpet Coil. Also, the information for which this PDS we are issuing is important like, it can be “Issued for Inquiry” or “Issued for Comments” etc. Apart from this, details of maker, checker and approver are important to trace the engineers involved in this project. Other details are document number, revision number which are important from documentation point of view. Also, mention the type of vessel whether it is flanged or monobloc type.
As, this helps the people at site for easy and errorfree identification of that vessel. Vessel description, tag number and project name are very important during erection work. Here you should put the logo and name of your organization. So, we can see in below data sheet, here we have provided all required specifications for the fabrication of a jacket vessel. So, to understand first section let us go through the below process data sheet format. We can divide agitated reactor process data sheet in two sections, first is jacketed vessel specification and second agitator specification. So that you are able to provide correct and complete specifications for the vendor. We will try to understand various components of this PDS.
In this article we will go through the Process Data Sheet of Agitated Reactor or Vessel. Apart from reaction operation we use agitated reactors for crystallization, evaporation, mixing, etc. Moreover, agitated reactors are most suitable for small scale production capacities and provide flexibility to produce multiple products in same setup. However, we use these reactors mostly in batch & semi-batch operations for the production of fine chemicals, APIs, specialty chemicals, etc. When we use this reactor in continuous mode is also know as CSTR or continuous stirred tank reactor. We can operate this reactor in batch, semi-batch and continuous mode. Agitated Reactors are most widely used reactors in our Chemical Process Industries.
0 kommentar(er)
