Search results
Results from the WOW.Com Content Network
A modern recovery boiler consists of heat transfer surfaces made of steel tube; furnace-1, superheaters-2, boiler generating bank-3 and economizers-4. The steam drum-5 design is of single-drum type. The air and black liquor are introduced through primary and secondary air ports-6, liquor guns-7 and tertiary air ports-8.
A schematic process flow diagram of a basic 2+1-reactor (converter) SuperClaus unit is shown below: Schematic flow diagram of a straight-through, 3 reactor (converter), Claus sulfur recovery unit. The Claus technology can be divided into two process steps, thermal and catalytic.
The recovery boiler recovers the gas turbine waste heat. The solar energy collected at the parabolic troughs can increase the flow of steam produced in the recovery boilers. The steam produced in the two recovery boilers is expanded in the three body steam turbine (High, Medium and Low Pressure).
A steam boiler evaporates liquid water to form steam, or gaseous water, and requires frequent replenishment of boiler feedwater for the continuous production of steam required by most boiler applications. Water is a capable solvent, and will dissolve small amounts of solids from piping and containers including the boiler.
The boilers were also mostly used as heat-recovery boilers, from the exhausts of large marine diesel engines, as these operated at a lower temperature than a direct-fired boiler. Some were equipped as composite boilers , heated by exhaust gases when under way or with oil-firing when in port.
The now-asymmetric boiler could pass all of its exhaust gas through the superheated side as the single flow type. [10] The other bank remained in use for purely radiative heating, often with fewer rows of tubes. Alternatively the 'double flow' boiler retained full gas flow through both sides, although only one of these contained a superheater.
In many types of processes, combustion is used to generate heat, and the recuperator serves to recuperate, or reclaim this heat, in order to reuse or recycle it. The term recuperator refers as well to liquid-liquid counterflow heat exchangers used for heat recovery in the chemical and refinery industries and in closed processes such as ammonia-water or LiBr-water absorption refrigeration cycle.
A regenerative thermal oxidizer (RTO) is an example of a waste heat recovery unit that utilizes a regenerative process.. A waste heat recovery unit (WHRU) is an energy recovery heat exchanger that transfers heat from process outputs at high temperature to another part of the process for some purpose, usually increased efficiency.