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Comparision the deliquescent air dry with refrigerant air dryer

Model  Deliquescent  Refrigerant Regenerative How dryer removes moisture chemical absorption, Desiccant absorbs moisture and dissolve slowly. Desiccant not regenerated Heat transfer, cools air to condense moisture physical adsorption, desiccant attracts and holds moisture on surface unit regenerated  Operating principles Air enters lower central area of vessel where larger droplets and solid particles are separated mechanically. As the desiccant melts, moisture is adsorbed by the tablets. the water and dissolved desiccant drop to the claim area, which can be drained manually or automatically. Entering air is pre-cooled in first heat exchanger before entering the second for final cooling. Heat from the air is transferred to the cool refrigerant. Condensed moisture is trapped and discharged through an auto drain. One tower receives wet air, which flows through desiccant bed, and the moisture collects on the desiccant. simultaneously desiccant in other tower is being regeneated. Collected moisture is driven off by electric or steam heat and/or a purge of dry air from operating tower.  Desiccant  Desiccant tablet none  Activated Alumina & Molecular Sieve Energy required  none Electric. water for watercooled condensers where specified Electric plus power for regeneration electric and lose compressed purge air  Environmental problems   none  exhaust gas pollutin of cool coal rest of active carbon, pollution  Pressure Dew Point(at7kgf/c㎡)  8℃ yearly mean （in winter -3℃）  4℃-10℃  -40℃-80℃  Oil removal ability remove some larger liquid-phase oil particles condese some oil droplets during cooling process none Drop (Pressure loss)  <1%  5-8%  10-15% Inlet air temp-max-min  38℃ No minimum  38℃  4℃    38℃  4℃    Location indoors or out doors  indoors indoors or out doors Pre filter required recommended where heavy amounts of oil are present to prevent coating of desiccant tablets recommended. prevents fouling of heat exchanger Yes. prevents oil and liquid water from damaging or overloading desiccant bed after filter required yes. to prevent particle migration from desiccant in case of system upset recommended for critical applications yes, to prevent particle migration from desiccant. Maintenance Drain condesate once every year by drain manually or with auto drain blow dust from condenser fins regularly, check and clean auto drain replace desiccant every 1 or 2 years, adjust controls. clean or replace filter elements Repair requirements none qualified service personnel  qualified service personnel efficiency and function saving expenses without air consumed regular maintain: outlet of pollution; loss about 8-10% ative alumina replaced every year, expenses increased, air loss will be more. Maintenance cost comparision for air dryer    Power Refrigerant dryer deliquescent dryer  total (RMB)   power consumption  cost of pressure lost    total(RMB)   cost of solvent consumption  cost of pressure lost    sub  7.5HP 2,224 56 2,270 405 11 416 1,854 15HP 3,115 78 3,193 810 15 825 2,368 20HP 3,678 92 3,770 1,318 18 1,336 2,434 30HP 4,879 117 4,996 2,350 22 2,350 2,646 50HP 7,431 186 7,617 3,330 36 3,366 4,251 100HP 18,315 458 18,773 5,973 88 6,061 12,712 150HP 21,317 533 21,850 8,635 102 8,737 13,113 200HP 26,121 653 26,774 1,1823 125 11,948 14,826 300HP 37,830 946 38,776 1,6563 181 16,744 23,032 400HP 46,837 1,171 48,008 2,3645 225 23,870 24,138 600HP 65,302 1,633 66,935 4,0425 313 40,738 26,197 1000HP 100,580 2,515 103,095 6,5400 483 65,883 37,218 BDX-AC power consumption Power 7.5HP 15HP  20HP  30HP  50HP  100HP  150HP  200HP  300HP 400HP  600HP  consumption(RMB) 115  115   648   1,152   2,160   2,664   3,960   4,320   4,320   8,640   8,640  Remarks： 1. air pressure for the entrance：7kgf/cm²； 2. maintenance costs in calculated by 6000 hours/year； 3. 1.5 yuan rmb/grad for industry power； 4. solvent cost is 25RMB per kilogram； 5. the pressure loss of deliquescent air dryer is work pressure of 0.5%-1%, the pressure loss is calculated by work pressure of 1%. Consumption changes of solvents in seasons Model Power of compressor volume(m³/h)  Spring-Autumn(3-5,9-11) Consumption(kg) Winter(12-2) Consumption(kg)  Sommer(6-8) Consumption(kg)  on one year Consumption(kg)  BDX002AC  2HP  20   2.1   0.5   2.7   5.3  BDX007-AC    7.5HP   60   6.4   1.6   8.2   16.2  BDX015-AC    15HP   125   12.6   3.1   16.7   32.4  BDX020-AC    20HP   200   20.5   5.1   27.1   52.7  BDX030-AC    30HP   350   36.3   9.1   47.7   93.1  BDX050-AC    50HP   500   52.3   12.9   68.0   133.2  BDX100-AC    100HP   900   95.4   23.2   120.3   238.9  BDX150-AC    150HP   1,300   137.0   34.0   174.3   345.3  BDX200-AC    200HP   1,800   186.7   45.6   240.6   472.9  BDX300-AC   300HP   2,500   260.4   64.0   338.1   662.5  BDX400-AC    400HP   3,600   373.3   91.3   481.2   945.8  BDX600-AC    600HP   5,000   596.2   146.5   773.7   1, ,516.4  BDX1000-AC    1000HP   8,034   1,028.1   252.7   1,334.2   2,615.0  Remarks：  air pressure for the entrance：7kgf/cm²  air inlet temperature：spring and autumn 15℃；sommer 32℃；winter 5℃  solvent consumption is calculated by 6000 hours/year, 3000 hours in the fall and spring, summer and winder 1500 hours running. Maintenance cost of deliquescent air dryer  Model Power  solvent consumption  cost of pressure loss   total(RMB)   BDX002-AC   2HP   133   5   138   BDX007-AC   7.5HP  405 11   416   BDX015-AC    15HP   810   15    825   BDX020-AC    20HP   1,318   18    1,336   BDX030-AC    30HP   2,350   22   2,372  BDX050-AC    50HP   3,330   36   3,366  BDX100-AC    100HP   5,973   88   6,061  BDX150-AC    150HP   8,635   102    8,737   BDX200-AC    200HP   11,823   125    11,948   BDX300-AC    300HP   16,563   181    16,744   BDX400-AC    400HP   23,645   225    23,870   BDX600-AC    600HP   40,425   313    40,738    BDX1000-AC    1000HP   65,400   483    65,883  Remarks： 1. air pressure for the entrance：7kgf/cm²； 2. maintenance costs in calculated by 6000 hours/year； 3. solvent cost is 25RMB per kilogram； 4. the pressure loss of deliquescent air dryer is work pressure of 0.5%-1%, the pressure loss is calculated by work pressure of 1%.