# How many recycle streams are in the figure?

Contents

## How do you calculate recycling streams?

When we study recycle systems, we are often asked to calculate the recycle ratio. Usually, this is found by dividing the mass flow of the recycle stream by the mass flow of the “fresh feed” entering the system.

## How do you calculate recycling ratios?

A recycle ratio is a key profitability measure of the oil and gas industry. The ratio is calculated by dividing the profit per barrel of oil by the cost of finding and developing that barrel of oil.

## Why are recycle streams used?

The purpose of a recycle stream is to take unreacted reactants and reuse them, ensuring the highest process efficiency possible.

## What is the value of F for the B solution to remain 80% KOH if the recycle stream is removed?

10. What is the value of F for the B solution to remain 80% KOH if the recycle stream is removed? Explanation: Second reactor balance, KOH: B*0.8 = C*0.6 + 520.8*[0.9*1 + 0.1*0.6], => 4B = 3C + 2499.8, H2O: B*0.2 = C*0.4 + 520.8*[0.1*0.4], => B = 2C + 104.1, solving both equations we get B = 937.4 mole/hr.

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## What is recycle stream?

DEFINITION. A recycle stream is one where a portion of the outlet of a process unit is combined with fresh feed and sent into the same unit again. There are several reasons one might employ a recycle stream: increase conversion of a reactant to product.

## What is basis of calculation?

At a very basic level, basis is the cost of your business. The calculation of basis consists of your financial contributions into the company plus ordinary income and losses minus distributions (like dividends and other payouts).

## Can recycle ratio be more than 1?

Recycle ratios are typically between 1 and 20 with the total particulate flow through the boiler limited to between 2 and 3 times the fly ash flow.

## What is sludge recycle ratio?

The sludge recycle ratios in the range from 0.3 to 1 were consi- dered. … It was observed that at HRT of 16 h and the sludge recycle ratio of 0.85, the COD removal and SVI were 95 and 85 %, respectively. The sludge recycle ratio greater than 0.85 had no significant effect on the COD removal.

## What is recycle reactor?

Recycle reactors are used when the reaction is autocatalytic, or when it is necessary to maintain nearly isothermal operation of the reactor or to promote a certain selectivity (see Section 5.6. 6).

## What is the difference between recycle and bypass?

Recycle stream is a term denoting a process stream that returns material from downstream of a process unit back to the process unit. Bypass stream is a stream that skips one or more stages of the process and goes directly to another downstream stage.

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## What is Singlepass conversion?

Single-Pass Conversion = reactant input to reactor – reactant output from reactor. reactant input to reactor. ×100%

## What is mass balance calculation?

A mass balance, also called a material balance, is an application of conservation of mass to the analysis of physical systems. … In environmental monitoring the term budget calculations is used to describe mass balance equations where they are used to evaluate the monitoring data (comparing input and output, etc.).

## How do you calculate material balance and energy balance?

1. Material and energy balances can be worked out quantitatively knowing the amounts of materials entering into a process, and the nature of the process. 2. Material and energy balances take the basic form Content of inputs = content of products + wastes/losses + changes in stored materials.

## Why evaluation of energy and mass balance is important?

Material and Energy balances are important, since they make it possible to identify and quantify previously unknown losses and emissions. These balances are also useful for monitoring the improvements made in an ongoing project, while evaluating cost benefits.