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ISO9001 Heating Exchanger Superheater And Reheater Device

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ISO9001 Heating Exchanger Superheater And Reheater Device

Brand Name : HD Boiler

Model Number : HDBSR0118

Certification : ASME, Grade A, ISO9001, TUV

Place of Origin : China

MOQ : 50 Sets

Price : 1,600 - 3,000 USD per ton

Payment Terms : T/T, L/C at sight, Western Union

Supply Ability : About 12,000 tons per month

Delivery Time : Within 50-90 Days after getting the down payment

Packaging Details : Sea worthy Packing for Exporting with iron frame

Style : Horizontal

Application : Building Material Shops, Manufacturing Plant, Food & Beverage Factory, Construction works , Energy & Mining, Power Station and Sugar Mill

Material : Carbon steel,heat resistant steel, stainless steel, alloy steel

Usage : Industrial,Power Station,Thermal power plant/station boiler

Color : Customized

Fuel : Coal-fired,Oil-filed, Waste heat

Condition : New

Pressure : High Pressure/Low Pressure

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Steel Superheater and Reheater Heating Exchanger Device for Power Plant Boiler

Description

The function of Super heater in the thermal power plant is to remove the last traces of moisture from the saturated steam coming out of boiler and to increase its temperature above saturation temperature as per requirement at inlet of steam turbine.

ISO9001 Heating Exchanger Superheater And Reheater Device

Details

In general, steam heated in high pressure superheater is named superheated vapour, the steam heated by reheater is called reheated vapour. The parameter of reheated steam is relating with economy of thermal circulation. Generally, the pressure of reheated steam is about one fifth of that of superheated steam, and the temperature of the former is almost the same as that of the latter. For example, in our nation for boiler with 125MW, 400t/h, the parmameter for superheated steam is 133.7Mpa and 555 degrees; the inlet and outlet pressure of reheated steam is 2.5/2.35MPa, their temperature is 555 degrees, too. For boilers with 200MW, 670t/h, the parameter of superheated steam is 13.7MPa, 540 degrees; the inlet and outlet pressures are 2.7/2.5Mpa, and the temperature is also 540 degrees. For subcritical pressure control circulation boilers with 300MW, 600MW, superheated steam parameter is 18.27Mpa, 540 degrees; the inlet and outlet pressures are 3.83/3.63MPa, the temperature is also 540 dgrees. Application of steam reheating system can increase the thermal economy for power stations by 4-5%. In our country, units with capacity over 125MW all apply one time middle reheating system, and overseas, two times middle reheating systems are applied for some units with higher parameters.

In modern boilers, the heat absorption consumption of the superheaters and reheaters is over half of total heat absorption for the working fluid, thus the heating surfaces of superheaters and reheaters account for a large proportion in total heating surfaces of boilers, and they must be placed in the areas where smoke temperature is higher, the working conditions are the worst among all the heating surfaces.Tube wall temperature of the heating surfaces is close to the max. allowable temperature of steel, so the reasonable arrangement a dnd design of superheaters and reheaters matter so much for economy and reliability to the while boiler. When it comes to their design, on the basis of assurance of safety and reliability of superheater and reheater, it is very necessary to save metal consumption at the best, especially to save usage of alloy steel.

For boilers in large power stations, superheaters and reheaters are necessary parts, to a large extend, they have influced the safety and economy of boilers. Superheaters are the heating surfaces which heat the main steam from the surnatured temperature to the rated superheated temperature, and the reheaters are the heating surfaces which heat the exaust from the steam turbine high pressure cylinder to a certain temperature.When running conditions like boiler loads, coal types change, it is to adjust them to make sure the outlet temperature at the rated level of -10-+5 degrees.

For large boilers in power stations, superheaters and reheaters account for a big proportion in the total heating surfaces, they are to be arranged in the areas where smoke is with higher temperature. To improve the efficiency of thermal circulation in power stations, it is needed to improve the original parameters f steam gradually, the increase of steam pressure requires the corresponding increase of temperature for superheated steam, or the humidity of large stage exhaust of steam turbine will be too high, which will influence its safety. Thus, the steam flowing through superheaters and reheaters are high temperature steam, their heat transfer performance is quite bad, which determines that tube wall temperatures of superheaters and reheaters are high.

ISO9001 Heating Exchanger Superheater And Reheater Device

Principle

• Principle of superheater is similar to steam generating tubes of boiler.

The hot gases at high temperature sweep over superheater tubes and raise the temperature of steam which magnitude depends upon exit gas temperature leaving the superheater and gas velocity.

ISO9001 Heating Exchanger Superheater And Reheater Device

Application

use for heating saturated steam, steam temperature could be up to 900 degree C.

Superheater Capacity Upgrades to Increase Power Generation

Send us required technical data, such as steam capacity, presure, required temperature etc. We will design accordingly.

Differences

Type Advantages Disadvantages Supporting method
Pendant-type 1.Firm structural support 1. Flow blockage by condensed steam 2. Needs slow restart to purge the water that accumulates in the bottom. supported from above
Inverted-type 1.Proper drainage of the condensed steam 1. Lack the structural rigidity, especially in high speed gas flow Supported from below
Horizontal -type

1. Proper drainage

2. Good structural rigidity.

1. They do not view the flam directly so they are mainly from the convective type Usually supported in the vertical gas ducts parallel to the main furnace.

ISO9001 Heating Exchanger Superheater And Reheater DeviceISO9001 Heating Exchanger Superheater And Reheater DeviceISO9001 Heating Exchanger Superheater And Reheater Device


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