Desuperheater is a device used to save the energy by cooling a superheated steam in a power generation plant. Superheated steam has important advantages on certain applications, for example, when used in power stations to drive turbines. For efficient use on heating applications however, the steam must be desuperheated.
Desuperheating is the process by which superheated steam is restored to its saturated state, or the superheat temperature is reduced. Basically there are two types of superheaters
• Indirect contact type - The medium used to cool the superheated steam does not come into direct contact with it. A cooler liquid or gas may be employed as the cooling medium, for example, the surrounding air. Examples of this type of desuperheater are shell and tube heat exchangers.
• Direct contact type - The medium used to cool the superheated steam comes into direct contact with it. In most cases, the cooling medium is the same fluid as the vapour to be desuperheated, but in the liquid state. For example, in the case of steam desuperheaters, water is used.
Maniks are having comprehensive range of dessuperheater supply since last three decades. Maniks introduced variety of desuperheaters with precise temperature control for various applications in chemical or oil & gas process plants where the available refrigerant is at superheated conditions. These Desuperheaters have high performance, custom design, easy to install and requires very low maintenance.
In the normal refrigeration cycle, a refrigerant gas such as ammonia, Freon is compressed in a compressor, passes through a condenser where it gives off heat and changes to a liquid state and then is passed through an expansion valve to an evaporator coil to absorb heat and change the refrigerant back to a gaseous state for' recompressing in the compressor to complete the refrigeration cycle. The evaporator coil is positioned within a refrigerated box, display case, or cabinet and the heat absorbed by the refrigerant passing through the coil serves to extract heat from the refrigerated box and its contents to maintain the box at the desired temperature. As is well known, this extracting of heat from the refrigerated box' and its contents causes frost to form on the evaporator coil and refrigerated box which periodically must be removed to maintain proper functioning of the evaporator coil and avoid undesirable build-up of frost on the coil or other parts of the refrigerated box.
There are two types of desuperheater provided by Maniks
• Freon Desuperheater - SERIES HEF 33- XXX- 22
• Ammonia Desuperheater - SERIES HEA 77- XXX- 717
Design Features of a Desuperheater
• High efficient atomization.
• Accurate and repeatable control fluid temperature.
• Tight shut off variable spray unit.
• High rangeability variable area spray unit.
• Erosion resistance materials of selection.
• Ease of installation.
• Low maintenance features.
• High integrity sealing arrangement.
• Thoroughly checked at factory to ensure that it meets the specified performance on site with high integrity.
• Quality assurance at every stage of manufacturing.
• Comprehensively designed and tested to ensure its optimum performance for the tough process Parameters specified.
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Advantages of Maniks Desuperheater

• Reduction in condenser pumps power consumption.
• Minimal pressure drop
• Compact designs
• Design code compliant
• Range of outlet superheat capabilities
• Variety of standard materials
• Horizontal or vertical orientation with upward flow


Applications of Desuperheater:
• HOTELS & HOSPITALS:
Water for Bathing/ Sterilizing/ Kitchens/ Laundries
• PHARMACEUTICAL & CHEMICAL:
Dehumidifiers/ Calorifiers/ Autoclaves/ Boiler Feed/ Air Preheating/ Tablate Coating Machines
• DAIRY & FOOD PROCESSING:
Hygienic Washing & Cleaning/ Boiler Feed/ Chocolate Tracing/ Powder Drying/ Dehumidifiers
• TEXTILE:
Dehumidifiers/ Yarn Drying/ Preheating/ Boiler Feed
• ENGINEERING & AUTOMOBILE:
Boiler Feed/ Degreasing/ Washing & Cleaning/ Paint Shop Processes

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