JPS61212312A - Dehumidifying device - Google Patents

Abstract

PURPOSE:To reduce the running cost and to eliminate requirement for a cooler by installing a heat pump for heating air for regeneration using the air at the dehumidified air side as heat source, installing also an evaporator for exchanging heat with the dehumidified air and a condenser for exchanging heat with the regenerated air. CONSTITUTION:Wet air (e) discharged from a drying chamber (or an air conditioning chamber) 11 is dehydrated by passing through a honeycomb rotor 12 comprising plates contg. an absorbent such as LiCl or an adsorbent such as active carbon, and transferred to the drying chamber 11 after cooling in an evaporator 20 of a heat pump. The rotor 12 having absorbed or adsorbed the moisture is transferred to the passage of regenerated air by turning and regenerated by the air (e) at high temp. and low humidity discharged from an auxiliary heater 25. The heat in the exhaust air (f) after regeneration is transmitted to the sucked air in a heat exchanger 24 and liberated. The air for regeneration (h) is heated in the heat exchanger 24, heated further in a condenser 18 of the heat pump, heated also in the auxiliary heater 25 and transferred to the rotor 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a dehumidifying device applied to dryers, dehumidifiers, solvent recovery devices, and the like.

[Conventional technology]

FIG. 3 shows a conventional absorption or adsorption dehumidifier,
This is a honeycomb type dehumidifier. In addition to the honeycomb type that performs continuous absorption or adsorption and regeneration as shown in Figure 3, conventional absorption or adsorption types include those that perform absorption or adsorption and regeneration in one batch. Are known.

In Fig. 3, the honeycomb rotor 1 is equipped with an absorbent or adsorbent, and when the air sent through the honeycomb rotor 1 passes through the honeycomb rotor 1, moisture is absorbed or adsorbed in the moisture absorption zone 2, resulting in a high temperature. The air becomes dry. Since the temperature will be high, the structure is such that it is cooled in a cooler 7 and then sent to a drying warehouse to avoid deterioration. The Noronicum rotor 1 rotates slowly, and the portion that runs through the air path of the moisture absorption zone 2 moves to the air path of the regeneration zone 3. On the regeneration air side 1c,
First, the outside air is heated by heater 4 and the relative humidity drops, creating a regeneration zone! The water content in a honeycomb rotor 1 with an IC is evaporated to lower the water content. The humid air is exhausted to the outside via the fan 6.

The effects of absorption or adsorption and regeneration in the dehumidifying device shown in FIG. 3 will be explained on the psychrometric diagram shown in FIG. 4. Note that, for the sake of simplicity, FIG. 4 is an example in which outside air is dried. Outside air a is dehumidified by the honeycomb rotor 1 and becomes air b. At this time,
The temperature is also rising due to latent heat of condensation. It is cooled in a cooler and becomes b'. On the other hand, the air on the regeneration side is heated by a heater and becomes C, regenerating the honeycomb rotor 1, and the water evaporates, resulting in B.

[Problem that the invention seeks to solve]

The absorption or adsorption type dehumidifiers described above are often used to obtain air with a low dew point, but they require a large amount of heat from the heater 4;
It has the disadvantage that the running cost increases by 2, and also requires a cooler 7, which requires cooling water or a refrigerator.

The present invention aims to eliminate the drawbacks of the above-mentioned conventional devices, and also aims to provide a dehumidifying device which is intended to reduce running costs and which does not require a cooler. Means for Solving Problem C] The present invention, as a means for achieving the above object, is provided with a heat pump that heats the regenerating air using the dehumidifying air as a heat source.

That is, the present invention provides a dehumidification device that heats and regenerates the absorbent or adsorbent that has absorbed moisture by the absorbent or adsorbent, which includes an evaporator that exchanges heat with air on the dehumidifying side, and an evaporator that exchanges heat with the air on the regenerating side. This is a dehumidifying device characterized by having a condenser and a heat pump that heats the regenerating air using the dehumidifying air as a heat source.The present invention will be described in detail below with reference to FIG. 1st
The figure is a diagram showing an embodiment of the present invention, and is a nine example using a honeycomb second rotor. In FIG. 1, a honeycomb rotor 12 is made of plates coated with lithium chloride as an absorbent, activated carbon, zeolite, etc. as an adsorbent, woven into a honeycomb shape, and air passes between the honeycombs. A motor (not shown) is installed so that the honeycomb rotor 12 can rotate slowly.
The air passage passing through the honeycomb rotor 12 is partitioned into a moisture absorption side and a regeneration side. The heat pump composed of a compressor 17, a condenser 18, an expansion valve 19, and an evaporator 20 is of a compression type using a refrigerant. Evaporator 20
' indicates the position where the evaporator 20 is installed instead of the evaporator 20, and which one is better is mainly determined by the conditions of the drying chamber 11.

The heat exchanger 24 is for waste heat recovery, and is better to have in terms of energy efficiency, but the system can be configured without it. In addition, in Figure 1, 22° 23° fan shaft, 25°
is an auxiliary heater.

To explain the function of the above device, drying warehouse (or air conditioned room)
The humid air (1) coming out of the honeycomb rotor 11 is sucked into the fan 23 and slightly heated by the heat of the fan (A), and then moisture is removed by the adsorbent or absorbent of the honeycomb rotor 12 and the temperature reaches 41.
0). It is further cooled in the evaporator 20 and then in the drying chamber (
or air-conditioned room) 11.

The honeycomb rotor 12 that has absorbed moisture slowly rotates and moves to the regeneration air path. The air (power) coming out of the auxiliary heater 25 has a high temperature and low humidity, so the moisture in the honeycomb rotor 12 is removed and the air (force) comes out with a low temperature and high humidity (K).
becomes.

The heat exchanger 24 transfers the heat of the exhaust gas to the intake air and releases it.

On the other hand, air for regeneration (i) is heated by a heat exchanger 24, passed through a condenser 18 (b), and further heated by an auxiliary heater 25 such as an electric heater or a steam heater (p). It is sent to the honeycomb rotor 12. In addition, fan 2
2 serves as a pressure source for sending air. Further, the auxiliary heater 25 is not necessary if a large amount of dehumidification is not required.

In the heat pumps 17 to 20, the refrigerant is converted into high-pressure gas in the compressor 17, and is condensed by dissipating heat in the condenser 18. The liquid refrigerant is depressurized by the expansion valve 19 and goes to the evaporator 20.
It absorbs heat and returns to the compressor 17.

Figure 2 shows the movement on the psychrometric chart. The symbol arc indicates the state of the air corresponding to the location shown in Fig. A heat pump can be used in the same way for a two-column system that performs regeneration. Furthermore, if an organic solvent such as trichlene is adsorbed instead of water, it can be used as a solvent recovery device.

〔Effect of the invention〕

Conventional methods require a cooler and cooling water or a refrigerator to cool the dry air, but the present invention uses air on the moisture absorption side as a heat source and uses it to heat the air on the regeneration side. Since it uses a heat pump that does Furthermore, since the present invention is provided with a heat pump,
It is energy efficient and has the effect of reducing running costs compared to conventional regeneration using electric heaters or steam heaters.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention, in which a honeycomb type rotor is used. FIG. 2 is a diagram showing the state of air flow in the embodiment device shown in FIG. fa1. FIG. 3 shows a conventional honeycomb type dehumidifier.FIG. 4 is a diagram showing the state of air flow in the conventional system shown in FIG. Dry bulb temperature Figure 3 Figure 4 Dry bulb temperature procedure amendment June 7, 1985

Claims (1)

[Claims] In a dehumidifying device that absorbs moisture with an absorbent or adsorbent and heats and regenerates the absorbed absorbent or adsorbent, an evaporator exchanges heat with air on the dehumidifying side and a condenser exchanges heat with air on the regenerating side. What is claimed is: 1. A dehumidifying device comprising: a heat pump for heating regenerating air using the dehumidifying air as a heat source.