Advertisements

Demineralization

In many process boiler systems, zeolite softening of water is not sufficient to meet feed water quality standards. In these cases (typically high pressure boilers up;1000 psig), the water is demineralized. This process removes most of the mineral content of the raw water.
 
Demineralizers depend upon both cationic and anionic exchange processes. They can be arranged in many different combinations, based upon incoming water contaminants and desired final water quality. By the end of this chapter you should have a basic understanding of what demineralization does, how these systems work, and the basic steps necessary to troubleshoot a system
 
Demineralization on a commercial scale became possible after resin manufacturers developed methods of mass producing a new form of ion exchange resin. When regenerated with caustic (NaOH), this resin removed silica and carbon dioxide from the effluent of a zeolite resin operated in the hydrogen cycle. A standard cation resin of the type commonly found in zeolite softeners, which is regenerated with sulfuric acid as opposed to salt (hence: hydrogen cycle cation), is called a strong acid cation resin. An anion resin with a strong affinity for silica and carbon dioxide is described as a strong base anion resin. An offshoot of the strong base anion resin development was the production of a chemically different resin with a strong affinity for strong-acid anions: sulfate (SO4), chloride (CI), nitrate (NO3), phosphate (PO4), etc. This was called a weak base resin. The weak base resin does not remove silica or carbon dioxide, as does the strong base resin. Therefore, it cannot be used alone to produce the water purity demanded by high-pressure steam plant operations. Less caustic is required to regenerate the weak base resin and it is often coupled with a strong base resin in the same vessel to produce the most economical anion unit operation. The weak base resin is always loaded into the vessel last when the unit is readied for downflow service.
 
Putting the weak base resin on top of the anion resin bed uses its higher capacity for strong acid removal to insure that the strong base resin can concentrate on removing the weak acids associated with the carbon dioxide and silica (carbon and silicic acids).
 
The cation and anion vessels of a demineralizer train are piped in series so that the effluent of the cation unit enters the top of the anion unit and the discharge from the anion unit goes to the treated water header or into a polishing unit.
 
A discussion of what takes place as the raw water is processed through the various units in a demineralizer may help to explain the resins and their function.  read more……
Advertisements

Recent Posts: Flow meters Wiratama

Rheonik Coriolis Mass Flow Meters

The Rheonik coriolis meters are primarily Mass Flow Meters and they can measure mass very accurately. These two components are RHM coriolis flow sensors and RHE Coriolis Flow Transmitters

Elektrogas Automatic Safety Solenoid Valves

Safety solenoid valves for air and gas from delta elektrogas has many models such as VMM, vmh, vmr, vml, and VMRNA

VMH Elektrogas Safety shut off valves for gas

The VMH type valve is a safety shut off valve for gas with a hydraulic actuator. It is suitable for air or gas blocking and releasing controls, required in the main pipe of gas power burners, atmospheric gas boilers, industrial kilns, and others gas-consuming appliances

Solenoid Valve Shako Pneumatics

SHAKO Pneumatics has dedicated its entire resources to the field of pneumatic products and committed its energies to develop and produce new products

Air Diaphragm Pumps

An Air Diaphragm Pumps is a type of positive displacement pump that uses compressed air as a power source.

Vane Air Motors and Air Gear Motors Tonson

Air Motors are designed to operate by compressed air. For applications, where positive braking is a requirement, a range of caliper brakes is offered.

Air Winches for lifting and pulling in Hazardous Area

An air winch is powered by compressed air instead of electricity. The drive mechanism of the air winch will begin to power the cable drum and effectively raising or lowering the attached load

Perlunya Resetting dan Kalibrasi Flow meter secara berkala

kalibrasi flow meter dimaksudkan untuk mengembalikan performa flow meter guna mendapatkan faktor ketidak pastian pengukuran, yang merupakan akurasi flow meter dengan flow caliberator dan resetting

Dimensi Flange ANSI

Dimensi Flange Ansi#150

VALCOM – PRESSURE SENSOR

Valon pressure sensor products, vpr2, vprv-d, VSW2, VPRT, VDP4, VFM, VPRH, VPMC, Pressure Meter

 

Ada yang ingin ditanyakan silahkan :

1. Jika ada Pertanyaan tentang Product ataupun harga silahkan langsung hubungi :

 .

2.  Jika ada pertanyaan atau diskusi Tentang tulisan ini silahkan email ke admin@rudywinoto.com

.

Atau silahkan isi kolom dibawah ini dan klik submit  

.  

 
About Rudy Wiratama (980 Articles)
rudywinoto.com/wmablog.com/flowmasonic.com
%d bloggers like this: