Steam Heat Exchanger Stainless Steel Boiler Superheater

Heat Exchanger Stainless Steel Boiler Superheater For Steam/Hot Water Boiler

Product Introduce

The superheater is a device used to convert saturated steam or wet steam into superheated steam or dry steam. The superheated steam is used in steam turbines for electricity generation and steam engines etc.

Superheater is a heating surface that heats saturated water vapor under certain pressure into superheated water vapor under corresponding pressure.The heat absorption and steam flow of each parallel tube in the superheater tube group are different during operation.Boiler superheater is energy recovery boiler flue gas, the boiler steam heating can be obtained, a dry steam, to improve the boiler thermal efficiency, but also to steam turbines to avoid water hammer regenerator from steam turbine in the spent steam recycling energy, heat into the boiler circulating water and regenerator, level can be high pressure discharge of steam reheat, recovery boiler energy of these devices are large boiler steam system of auxiliary heating device, is beneficial to improve the energy efficiency of the boiler system, only the superheater and reheater is recycled flue gas energy, regenerator is recycling steam energy.The superheater can be divided into convection type, radiation type and half radiation type according to the heat transfer mode.According to the structural features can be divided into serpentine tube type, screen type, wall type and package wall type.Superheater tube wall metal bears the highest temperature in the pressure parts of the boiler. Therefore, high quality low carbon steel and various kinds of chromium-molybdenum alloy steel must be adopted. Sometimes austenite chromium-nickel stainless steel is used in the highest temperature part.

Types And Features

Function

The changes of boiler operating conditions, such as load height, fuel change and combustion operating conditions, all have an impact on the steam temperature at the outlet of the superheater. Therefore, there are means to adjust the steam temperature at the outlet of the boiler in the power station to stabilize it at the specified value.The common means are as follows: water spray type or surface type temperature reducer is used to regulate steam temperature directly;The temperature of flue gas in the furnace is changed by the oscillating burner.Heat absorption of superheater is adjusted by flue gas recirculation (see steam temperature regulation of boiler).When the boiler load is increased, the steam temperature at the inlet and outlet of the flow superheater increases and that of the radiant superheater decreases.If the flow type, radiant type and semi-radiant type superheater are combined and configured reasonably, the outlet steam temperature change can be small when the load and combustion condition change.The heat absorption and steam flow of each parallel tube in the superheater tube group are different during operation.In order to avoid excessive temperature in individual pipes, superheater is divided into several pipe groups in large boilers. Steam of each pipe group is mixed with the collector box outside the furnace and transposed with the steam pipe to avoid excessive temperature difference between the pipes.

HD Boiler offers a best in class facility,including

• Fabrication area of 200,000 square meters
• 150 Engineers
• 600 Coded welders
• 60 Licensed Inspectors (including NDT level-lll instructors)
• Grade-ALicenses for Design and Manufacture boiler (issued by the State Administration of Quality Supervision and Inspection)
• ISO 90001:2008 Quality System
• ASME Certificate of Utility Boiler
• ASME‘S’ , ‘U’ and NB stamp authorization