How the spraying equipment dehumidies and cools down

First, cooling dehumidification method
the spray equipment workshop air cooling to below the dew point temperature, the air moisture condensed into water. Remove condensate from reheating to obtain low humidity air. The cooling source of air can be used by the refrigerant, ice water or brine of the freezer
the
. Belongs to the reduction of moisture cooling.
characteristics:
(1) If the surface temperature of the cooling cob is below 0 degrees C, the condensate is frozen on the surface of the cob, which reduces the cooling efficiency dehumidification effect and therefore does not obtain stable humidity.
(2) for general use, the limit for cooling dehumidification is above 0 degrees C at the dew point.
(3) if the equipment is large, that is, increase power consumption, increase operating costs.
, compression dehumidification mode
the spray equipment workshop air compression and cooling, the air moisture condensed into water. Remove condensate from reheating to obtain low-humidity air. The moisture in the air is expressed in the following formula:
X x 0. 622XPs/(P1Ps)
X: Absolute humidity Kg/kg
P: Absolute pressure Kg/cm2abs for compressed air.
Ps: vapor pressure Kg /cm2abs.
formula above indicates an increase in the compression force of the air P, i.e. a reduction in absolute humidity X, resulting in lower humidity.
characteristics:
(1) suitable for small air volume, low dehumidification.
(2) compression power cost is large.
(3) suitable for instrumentation, control, etc. need a small amount of high pressure dehumidification air for use.
3, chemical dehumidification mode
1, adsorbent intermittent type (tower type)
solid adsorbent (e.g. gel, divided into sieves, active gasified aluminum, zeolite, etc.) as a fixed layer, filled in Within the tower (barrel), the use of two towers above the tower, one tower is used to absorb air moisture, the other tower regeneration, after a certain period of time to convert the tower and change the air circuit so that moisture absorption and regeneration action interchange, so that intermittent dehumidification air can be produced. The surface of the adsorbent is porous structure, and the moisture in the air is absorbed to the surface by capillary tubes, so it has a moisture absorption effect.
characteristics:
(1) using solid adsorbents to obtain low dehumidification air.
(2) to convert dehumidification and regeneration at a fixed time, so stable dehumidification air cannot be obtained continuously.
(3) the adsorbent needs to be replaced regularly.
loss of the (4) unit is large.
(5) regeneration temperature is high.
(6) gas flow circuit is fully confined and therefore available for dehumidification of non-air gases.
2, liquid absorbent
using lithium chloride solution as an absorbent, by dehumidifiers, regenerators and circulating pumps constitute the main system, when the air in the dehumidifier contact with the sprayed absorbent, the moisture in the air is absorbed by the solution and dehumidified, and then by the cooling cob tube cooling due to the absorption of condensation to absorb heat. The solution that has absorbed water is pumped by the solution cycle to the regenerator, and contact with the regenerative air heated by the heated cob, the water in the solution evaporates and is discharged outdoors with the regenerative air, so the concentration of the solution in the regenerator is increased and the circulating pump is fed into the dehumidifier again.
characteristics:
(1) continuous dehumidification, regeneration action, can obtain a stable dehumidification air.
(2) Since the solution is in a foggy and air joint, it is necessary to prevent the solution from being carried out or dispersed.
(3) Because lithium chloride in different liquid concentrations and temperatures will produce different points of ionization or crystallization, it is necessary to control the solution concentration for the characteristics of the solution, otherwise it is easy to cause circulation pump damage or nozzle blockage.
(4) need to be replenished regularly and the solution replaced.
(5) sterilization and washing of air.
(6) set-up fee is high, maintenance fee is high.
3, back to the transformation of dry beehive-shaped turntable
to the beehive structure to form a cylinder-shaped turntable, and then by the special crystallization processing method attached to moisture absorbent (lithium chloride, gel, zeolite, etc.) raw materials to make a dehumidification turntable. This dehumidification turntulate swings around the box separated into dehumidification and regeneration zones. The dehumidification air passes through the dehumidification zone, the water in the air is absorbed by the turntable, and the dry air is obtained by the spraying equipment. After absorbing water, the dehumidification area is moved to the regeneration area according to the turntable, the water from the regenerative heated air is taken out of the turntable and discharged outdoors, and the turntable is released into the regeneration area and then returned to the dehumidification area, so that dehumidification and regeneration are carried out continuously at the same time, so that stable dehumidification air can be obtained.
characteristics:
(1) to obtain a stable state of dehumidification air.
(2) humidity control is easy.
(3) depending on the diameter of the turntable, can be made into a variety of different air volume models.
(4) maintenance is easy.
characteristics of moisture absorption:
(1) lithium chloride turntable
(a) In humid climate conditions, the turntable is prone to saturation to cause moisture to flow out, or water absorption imbalance between the rotation of the turntable to produce a swing.
(b) When the relative humidity exceeds 75%, a heater should be added at the entrance of the dehumidifier to reduce the relative humidity of the inlet air to avoid overflying the absorbent.
re-humidifier regeneration can be re-added when the steering (c) turntable moisture absorption performance is poor.
(2) adhesive turntable (beehive SG turntable)
(a) there is no oversaturation of the turntable due to adsorption dehumidification.
(b) there is no need to control the relative humidity of the dehumidification inlet air.
(c) to dehumidification (160 degree Cdp) air at low dew points.
(d) turntable can be cleaned.
(3) zeolite turntable (hive Ms turntable)
(a) can be adsorbed for dehumidification of high temperature air.
(b) low dehumidification air is available.