Monday, 14 January 2019

Heatless Desiccant Dryers Overview

Heatless Desiccant Dryer

The Working Principle - Flow Direction

Wet air from the compressor flows UP the tower. This means that gravity will encourage the water, already collected from the air, down the tower and away from the dry desiccant. More water exists at the bottom of the tower than at the top.

A small amount of the dried air, is feed through the purge line DOWNWARDS through the “wet” tower. Water is concentrated at the bottom of the tower due to the direction of the wet air.

The downward direction of the purge air means that the bulk of the water in the tower does not have to pass through the bulk of the desiccant. The moisture only has to travel a short distance before it’s ejected.

Performance Recalculation - A Question

Why is it that you cannot up rate the dryer for inlet temperature below 35°C ?

The Answer:

  • You cannot push more than the nominal flow through the dryer because the pressure drop increases dramatically.
  • Additionally, the speed of the air increases, meaning that the air is in contact with the desiccant for less time, which results in less effective drying and an increased PDP
  • The additional air speed also disrupts the desiccant bead and causes “channels” to be formed - resulting in less effective drying. The extra friction also reduces the desiccant lifetime.
  • Up-rating the dryer for a lower inlet temperature means that after 3 minutes the desiccant bed is saturated as normal. However, the purge air is also cooler than normal, meaning that it has less capacity to hold water. The purge flow (nozzle) is sized based on a purge air temp of 35°C, meaning that if the temperature of the air is only 30°C, it will not have the capacity to dry the desiccant bed. 

Heatless Desiccant Dryer :

Choice Of Desiccant 

Why Use Different Desiccant ?

Different desiccants have different levels of water attraction
The greater the attraction, the better pressure dew point is possible, but the more purge is needed to regenerate the desiccant.
Most desiccant cannot provide a -70°C PDP
Desiccant that can provide a -70°C PDP is more expensive
We don’t want the customer to pay for something that’s not needed

What Desiccant Do We Use in Heatless Desiccant Dryers

For PDP’s of -20 to -40°C PDP Activated Alumina
For PDP’s of -70°C PDP Molecular Sieve
We balance performance with capital investment and ongoing running cost through purge air
For smallest dryers Molecular Sieve is used as due to small amount of desiccant the cost of it is not critical 

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Friday, 28 December 2018

Best Refrigerated Air Dryer Manufacturers

Best Refrigerated Air Dryer Manufacturers

 
When it comes to Refrigerated Air Dryer then Annair Drychill Tech India Pvt Ltd is the best solution. It is a part of “Thalakott”group, which is established in year 2005. Annair is the world-class manufacturer, Exporter and solution provider for compressed air treatment and industrial cooling and have more than 5000 successful installations with satisfied clients all over world.
Annair has developed an innovative range of Refrigerated Air Dryer series called Silver Star with high efficiently cooling module having direct effect on reducing energy consumption and pressure drop.
Refrigerated Air Dryer special features are:

Wednesday, 19 December 2018

How do you choose the right air compressor for your industry ?

Choosing an air compressor depends upon your requirement and your accessible electrical yield.

Silver Star Series (15CFM - 300CFM)


ANNAIR has developed an innovative range of air dryer series called Silver Star. This high efficiently cooling module has a direct effect on reducing energy consumption & pressure drop. The main Features are

Platinum Star Series Air Dryer

 Tube in tube type evaporator.

Thursday, 29 November 2018

What is Air Dryer ?

Air dryer

In simple word Air dryer is a machine, device, or a type of equipment which is used as Industrial as well as a Residential/Home Applications, to remove moisture (forced, dry or hot) from compressed air. Most commonly, Air dryers are used in industrial application in many industries like Hospital, Textile, and Telecom Industries etc. Air dryer process concentrates atmospheric contaminants, including water vapor. Nowadays equipment's are very costly and Air dryers prevent them from rusting and corrosion, which can be caused by unnecessary moisture. It also prevent from the rid of moisture which can affect the attachments, color and the finish of coats and paints. Air dryer works by cooling a warm and moisture full air by 3 degree and separate air and moisture, than through water-trap separated water removed.

TYPES
1.     Refrigerant
2.     Regenerative desiccant
3.     Single Tower
4.     Membrane

 Use full links:-
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Water Chiller 
Water Chiller India
Water Chiller Manufacturers
Refrigerated Air Dryer in Thane
Air Dryer Manufacturer in India
Air Dryer Manufacturer
Air Dryer in India
Air Dryer India
Gold star series
Air Dryer
Auto Drain Valve
Micro filters
Heatless Air dryer
Air Compressor Manufacturers
Moisture Separator

Annair Drychill Tech India Pvt. Ltd. Mumbai Manufacture Company Unit No. 101, I Wing, Plot - K1, Udyog Bhavan-2, Additional M.I.D.C, Anandnagar, Ambernath East, Thane- 421506, Maharashtra, India.
 Request a Quote for Annair Drychill Tech India Pvt. Ltd. Mumbai
Mail Us: sales@annair.com

Call US: 9320950116/ + (91)-251 2620660

Monday, 19 November 2018

How does a chiller system work?

Water Chiller Working


How Chillers Work

Designing a high reliability chiller requires an in depth understanding of chiller components, including their limitations as applied to specific cooling applications. A reliable and functional chiller system is a result of quality engineering and manufacturing activity.  When properly executed, ROI goes well beyond the initial commissioning at the point of application.

A process chiller removes heat from a heat source – an environment where temperature must be maintained on a continuous basis, otherwise known as the process. Heat removal is based on the principle that heat will move from a hotter source to a colder source.

A chiller comprises two main parts called circuits – a fluid and refrigeration circuit. These circuits, especially refrigeration, become more complex as temperature requirements drop below -40°C. With low- and ultra-low temperature cooling, system design incorporates additional cooling circuits (called two-stage, three-stage, and auto-cascade systems) and refrigerants.

A chiller transfers the heat from the process to the fluid circuit then to the refrigeration circuit and finally to the condenser where it is expelled.

    An air-cooled condenser expels heat by blowing cool air across the condenser, moving heat into the atmosphere.
    A water-cooled condenser expels heat by circulating cool water through lines in the condenser. The water moves the heat to an external cooling apparatus.

What constitutes high reliability chiller operation? It begins with design – matching component capacity to cooling requirements. Specifying the right components (valves, fluids, pumps, etc.) is critical. The interactive diagram below shows a chiller with single-stage refrigeration. It describes the major components of a chiller and their importance to reliable operation in the selection of a specific design.

 Use full links:-

Heatless Air Dryer
Refrigerated Air Dryer
Water Chiller India
Water Chiller Manufacturers
Refrigerated Air Dryer in Thane
Air Dryer Manufacturer in India
Air Dryer Manufacturer
Air Dryer in India
Air Dryer India
Gold star series
Air Dryer
Auto Drain Valve
Micro filters
Heatless Air dryer
Air Compressor Manufacturers
Moisture Separator

Saturday, 27 October 2018

What is use of Compressed air dryer

Compressed air dryer


A compressed air dryer is used for removing water vapor from compressed air. Compressed air dryers are commonly found in a wide range of industrial and commercial facilities.

Compressed air dryers are special types of filter systems that are specifically designed to remove the water that is inherent in compressed air. The process of compressing air raises its temperature and concentrates atmospheric contaminants, primarily water vapor. Consequently, the compressed air is generally at an elevated temperature and 100% relative humidity. As the compressed air cools, water vapor condenses into the tanks, pipes, hoses and tools that are downstream from the compressor.

Excessive liquid and condensing water in the air stream can be extremely damaging to equipment, tools and processes that rely on compressed air. The water can cause corrosion in the tank(s) and piping, wash out lubricating oils from pneumatic tools, emulsify with the grease used in cylinders, clump blasting media and fog painted surfaces. Therefore, it is desirable to remove condensing moisture from the air stream to prevent damage to equipment, air tools and processes. The function of removing this unwanted water is the purview of the compressed air dryer.

There are various types of compressed air dryers. These dryers generally fall into two different categories, Primary and Secondary. Their performance characteristics are typically defined by flow rate in Standard Cubic Feet per Minute (SCFM) and dew point expressed as a temperature, (sometimes referred to as Pressure Dew Point.)

Primary Dryers: Coalescing, Refrigerated and Deliquescent.

Secondary Dryers: Desiccant, Absorption and Membrane.

Refrigerated Air Dryer

Refrigeration dryers employ two heat exchanges, one for air-to-air and one for air-to-refrigeration. However, there is also a single TRISAB heat ex-changer that combines both functions. The compressors used in this type of dryer are usually of the hermetic type and the most common gas used is R-134a and R-410a for smaller air dryers up to 100 cfm. Older and larger dryers still use R-22 and R-404a refrigerants. The goal of having two heat ex-changers is that the cold outgoing air cools down the hot incoming air and reduces the size of compressor required. At the same time the increase in the temperature of outgoing air prevents re-condensation.

Some manufacturers produce "cycling dryers". These store a cold mass that cools the air when the compressor is OFF. When the refrigeration compressor runs, the large mass takes much longer to cool, so the compressor runs longer, and stays OFF longer. These units operate at lower dew points, typically in the 35–40 °F range. When selected with the optional "cold coalescing filter", these units can deliver compressed air with lower dew points. Non-cycling dryers use a hot gas by pass valve to prevent the dryer from icing up.

Some manufacturers produce "cold coalescing filters" that are positioned inside of the air dryer at the point of the lowest air temperature (the point at which maximum condensation has occurred) 

Source:  " Wikipedia " 


Annair Drychill Tech (I) Pvt, Ltd Mumbai Manufacture Company Unit No. 101, I Wing, Plot - K1, Udyog Bhavan-2, Additional M.I.D.C, Anandnagar, Ambernath East, Thane- 421506, Maharashtra, India. Undoubtedly it is one of the best Manufacturer Company in Mumbai.


 Request a Quote for Annair Drychill Tech (I) Pvt, Ltd Mumbai
Mail US: sales@annair.com

Call US: 9320950116/ + (91)-251 2620660



Monday, 1 October 2018

heatless air dryer working principle

Heatless air dryer working principle

Heatless Desiccant dryer

All about heatless air dryers

A majority of the Industrial Compressed Air Systems and different other applications of air dryers involve the use of Heatless Compressed Air  systems. High Pressure Gas and Air Drying Systems also involve the use of these compressed air dryers in many of their applications. Annair DryChill Tech india Pvt Ltd. in heatless air dryer manufacturing.

How heatless air dryer it functions?

The simplest form of a desiccant kind of air dryer is the heatless compressed one. It can achieve a dew-point of -40°C for the compressed air systems as well as the other applications of air dryers. After passing through the pre-filter, the wet incoming compressed air passes thorugh the assembly of the slide piston. Next, this air is directed towards the first chamber where in it travels upwards through the desiccant bed consisting of activated alumina or molecular sieves. This causes it to dry up due to the adsorption effect of the bed. The dry compressed air coming out of the first chamber now travels through the assembly of check valves hence paving its way through the alter-filter and thereby to the area of application or work. The desiccant in the second chamber that had been wetted in the previous cycle regenerates simultaneously as the compressed air dries in the first chamber. The purge valve depressurizes the second chamber down to the atmospheric pressure in the downward direction. Meanwhile, a portion of the dry compressed air flushes the desorbed moisture out by passing through the needle valve or orifice plate through the desiccant. The purge valve closes and the tower slowly re-pressurizes to line pressure ensuring a smooth changeover as the regeneration completes. An effective dewpoint of -40°C or even better is obtained at atmospheric pressure with an additional period of 5 minutes for drying. An approximate of 60 seconds is all the re-pressurization takes in the regeneration process. This is the principle involved in heatless air dryer manufacturing.

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