In the alumina production process steam trap is the key to the production of high-pressure stripping Industrial Valves, in the past, because of the large alumina hydrophobic regulator volume requirement for high temperature adjustment. Alumina drain valve is made by high pressure steam catalytic media conversion device, a key technology to poor working conditions, i. e. to ensure that its strength and sealing surface from cavitation damage Industrial Valves will make high pressure steam by increasing resistance expansion dissolved and flash to the saturation temperature, to increase the conversion of steam condensed water conversion, improve the effect of alumina in high pressure steam + base material. Special hydrophobic and alumina regulator in the condition of different location has different adjusting parameters, feed temperature generally between 130 to 380 degrees. Before the valve pressure in 3. 1 mpa to 4. 0 mpa, valve after pressure is zero. 2 mpa to 2. 4MPa。 The current domestic similar to trap in the operating conditions ( High pressure steam + base material) , now use the trap for the common regulation of trap + threaded hole plate precipitation to discharge the base material, due to the air inlet hole plate hydrophobic installed filters, although overcame the problem of easy blockage, increases the water drain, but orifice trap only application in steam system in less traffic. But for the special working condition of the alumina and high solid medium hardness, due to the valve plug can only stop to stay inside and outside differential pressure balance valve rear can open the screw drainage, and drainage effect is poor. Current drain valve for steam into condensed water conversion rate and the adjustment of the Industrial Valves opening normally only with the operator experience to judge, the valve open or closed position and steam conversion without scientific and effective detection methods. Alumina autoclave dissolution system of flash evaporator water injection method, the condensation water of high temperature condensed water preheating and high pressure end into the seventh and the first 8 flash vessel and the alumina autoclave dissolution system in settling a lotion into ninth and tenth grade flash vessel; And in alumina autoclave dissolution system of settling a lotion process not free or without settling a lotion, but at the same time will to something condensate pump of the condensation water is injected into the ninth and tenth grade flash vessel; When alumina autoclave dissolution system of flash vessel operating pressure is low or belt material, at the same time high temperature condensed water from the well water from the evaporator pressure into the ninth and tenth level through the flash evaporator. Due to high pressure dissolution reaction pressure boiler section needs with 6 mpa new steam heat the slurry is 200 ℃ to 260 ℃, the process will consume about 90 t per hour of new steam, produce about 90 t high pressure high temperature condensed water through the pneumatic control valve with condensed water flash tank, steam exhaust under 6 mpa and low temperature, so the trap selection is very important. Special alumina trap characteristics: 1, unique three times increase resistance capacity and secondary flash effect. In addition to the design and manufacturing of new type of trap for an increase in the damping plate resistance capacity, in the secondary seat and conducted an increase resistance capacity; When high pressure vapor through the disc and seat sealing surface generates a third increase resistance capacity; Level 3 increased resistance capacity that slows down the vapor pressure to achieve the diffusion also relieves the cavitation source. In the structure of the new type steam trap is designed on the disc secondary flash, d. c. , through the transformation of high pressure steam to condensed water flash structure effect is better, not only reduce the cavitation damage to the sealing surface, and improve the service life of the valve. 2, the original hole plate for the modification of the hydrophobic structure damping plate structure. Damping plate structure can be generated through the change of the internal structure of the multi-stage damping capacity and enhance the expansion effect, the improved damping plate trap can be precipitated by damping plate round holes larger material particles, pure steam as possible through the damping plate into the valve cavity to make high pressure steam resistance capacity, improve the regulation of high pressure gas inside the valve conversion rate, high pressure steam from import into the valve and damping plate collision, then part of steam from the damping plate on both sides of the bypass damper plate after collision with damping plate back again, steam is the energy consumption in the process of collision, increasing the steam into condensed water conversion rate. To sum up: alumina hydrophobic regulator has anti cavitation, and the characteristics of solid liquid leakage, compared with the control valve used in the working condition of petrochemical industry, electric power volume is larger, the production processing is difficult; This is a high value-added, former malleable good the valve products with high technical content.
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