New deaerator is a new type of membrane rotary packing deaerator studied and popularized in recent twenty years. The new film rotary filler deaerator has been applied in large, medium and small power plants in China. Nearly 500 power plants have received good economic and social benefits in their operation and use. The actual operation has proved that the new membrane rotary packing type deaerator, not only has the advantages of stable operation, high deaerefficiency, good adaptability, water quality, water temperature requirements and so on, and can exceed the force of about 30%, especially the heating unit and sliding pressure operation deaerator more realistic out of its further advantages than water film type.

2. demonstration of the type

GM-series new membrane spin filler deaerator (hereinafter referred to as deaerator) is to use steam turbine extraction to heat the boiler feed water to the saturation temperature under the working pressure of deaerator, remove oxygen and other gases dissolved in water, and prevent and reduce the corrosion of boiler water supply pipe, economizer and other auxiliary equipment. The model is composed of the main characteristic data of the deaerator (processing water quantity T / H).

3. technical requirement

This equipment is used for thermal oxygen removal of boiler feed water, consisting of deaerator and deaerator water tank and many accessories. Remove the oxygen and other gases dissolved in the boiler feed water, prevent the corrosion and heat transfer deterioration of the boiler and other thermal equipment and pipelines, and ensure the safe and economic operation of the thermal equipment. Its advantages are:

1. Stable operation and good deaerative effect, low pressure deaerator 10 PPB (ministerial standard is 15 PPB); high pressure deaerator 5 PPB (ministerial standard 7 PPB).

2. Strong adaptability to the load of the unit, especially the heating unit and sliding pressure operation, the deaerator is more superior, can run beyond the force of 50%, and the dissolved oxygen meets the ministerial standard.

3. In addition, through the actual operation of steam, water separation network, rotary membrane tube external size, membrane Angle, packing layer, constantly accumulate experience, learn from each other, make the current structure more perfect, eliminate the previous deaerator exhaust steam belt water, filler off, deaerator tower vibration and other defects.

For the old deaerator (water plate type, spray packing type) part of the technical transformation period is short, less investment, quick effect.

4. Deaerator selection-technical characteristics and supporting parameters (GM-series new low pressure membrane rotary filler deaerator)

CMH-series of new membrane spinning packing deaerator

5. Structure of the deaerator

It is composed of (1) shell (2) film generator (3) water generator (4) packing network (5) water tank, etc.

1, shell: it is made of welding the cylinder body and stamping oval head. The low pressure deaerator is equipped with a pair of flange connection for assembly and maintenance, and the deaerator is equipped with maintenance manhole.

2, membrane cyclone: composed of water chamber, steam chamber, membrane rotary tube, condensate water pipe, supplementary water pipe and a steam inlet pipe. Condensate water, chemical filling water, through the spiral membrane tube at a certain angle, forming the spiral membrane skirt, and with the primary heating steam over the introduced heating steam and the secondary heating steam contact by water tank is heated to close to the working pressure (i. e. below the saturation temperature 23℃) for crude oxygen. Generally, the membrane section can remove about 60% —— 90% of the oxygen content in the junction water.

3. The water generator is composed of several layers of L-shaped steel parts. The crude water supply through the film section and mixed by hydrophobic water for secondary distribution, which is evenly rained to the packing network under it.

4, packing network: is composed of flat steel strip and a cylinder, with a certain characteristics of stainless steel flat wire, feed water here full contact with secondary steam, heating to saturation temperature and deep deaerated, to ensure the oxygen content: lower than large steam deaerator less than 15 ug / L, high pressure deaerator less than 7 ug / L.

5, water tank: the uncondensed steam and oxygen and other gases analyzed by the feed water are discharged by the exhaust steam pipe installed on the sealing head. The peroxide supply water is collected into the lower container of the deaerated head, namely the water tank.