JPH1073365A - Drain water evaporator - Google Patents

Abstract

(57) [Summary] [Purpose] Evaporating drain water makes piping work unnecessary and removes water droplets in exhaust gas. [Structure] Drain water introduced from a water guide pipe 6 is supplied to an evaporator 3
In the drain water evaporator, which evaporates in the evaporation chambers 4A and 4B by the air flow chambers A and 3B and discharges the air A containing the water in the evaporation chambers 4A and 4B by the blower 13, the air A containing the water passes through the flow path of the air A containing the water And water droplet removing plates 21 to 23 for removing water droplets by colliding the air A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain water evaporating apparatus for evaporating and treating drain water (drain water) discharged from a cooling device for a closed housing mainly containing a control panel and OA equipment. Things.

[0002]

2. Description of the Related Art Conventionally, there has been known a cooling device which circulates a refrigerant by compressing a refrigerant from a refrigerant evaporator to a radiator through a conduit by a compressor to cool the periphery of the refrigerant evaporator. ing. In this type of cooling device, since the air around the refrigerant evaporator is condensed, it is necessary to drain the condensed water. However, since the control panel and the like are usually installed indoors, unlike a cooler for home use, a method of arranging a drain pipe and draining the water outside requires a large amount of piping work.

Therefore, in a small cooling device, a method of evaporating drain water by using waste heat of a refrigerant evaporator is also adopted. In such a method, wastewater treatment of a large cooling device is performed in a capacity manner. Can not do. For example, a large-sized cooling device requires a wastewater treatment of 1 liter or more per hour.

As a method of improving the wastewater treatment capacity, the present inventor has tried various methods as described below.
First, in the method of spraying drain water in the form of mist with ultrasonic waves,
Although the processing capacity is large, the water droplets scattered in the form of a mist are not dissolved in the air, so that the floor and other devices around the wastewater treatment device are wetted by the mist, thereby deteriorating the environment. Therefore, a main object of the present invention is to make piping work unnecessary by evaporating drain water, and to remove water droplets in exhaust gas.

On the other hand, in the method of elevating the temperature of a metal plate and evaporating waste water by the heat of the metal plate, the metal plate is heated to a high temperature of about 300 ° C. to 400 ° C. in consideration of the processing capacity and the miniaturization of the apparatus. There is a need to. It is not preferable that the temperature of the device is high. Therefore, another object of the present invention is to provide
An object of the present invention is to provide a drain water evaporator capable of lowering the temperature of an evaporator.

[0006]

According to a first aspect of the present invention, drain water introduced from a water pipe is evaporated in an evaporation chamber by an evaporator, and air containing moisture in the evaporation chamber is removed. In a drain water evaporating apparatus discharged by a blower, a water drop removing plate for removing water drops by colliding the air with a flow path of air containing water is provided.

According to the first aspect, when air hits the water drop removing plate, water droplets in the air adhere to the water drop removing plate and are removed.

On the other hand, a second invention is a drain water evaporator for evaporating drain water introduced from a water pipe in an evaporation chamber by an evaporator and discharging air containing water in the evaporation chamber by a blower. A water droplet removal chamber is provided downstream,
A water drop removing plate for colliding air containing moisture to remove water drops is provided at each of an air inlet into the water drop removing chamber and an air outlet from the water drop removing chamber. And

According to the second aspect of the present invention, since the air hits the water drop removing plates at the two locations of the inlet and the outlet, the water drops in the air can be sufficiently removed. In addition, since the temperature of the water drop removing plate at the outlet of the water drop removing chamber is relatively low, water dissolved in the air can be removed.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
4 will be described with reference to FIG. As shown in FIG. 1, the drain water evaporator includes an inner case 1 indicated by a one-dot chain line and an outer case 2 indicated by a two-dot chain line. In the inner case 1, first and second evaporators 3A and 3B for raising the temperature of the drain water and evaporating it are accommodated. On the other hand, while the inner case 1 is housed in the outer case 2,
As clearly shown in FIG. 2, a slight heat insulating space S is formed between the two cases 1 and 2 to prevent the outer case 2 from becoming hot. The inner case 1 is made of stainless steel, while the outer case 2 is made of a steel plate.

The inside of the inner case 1 is divided into a first evaporation chamber 4A, a second evaporation chamber 4B, and a water droplet removal chamber 5. An air inlet 40 for taking in air is provided in the first evaporation chamber 4A.
On the other hand, an air outlet 50 for discharging air containing water is connected to the water droplet removal chamber 5.
In the first and second evaporation chambers 4A and 4B,
The first and second evaporators 3A and 3B are accommodated.

The first and second evaporators 3A and 3B are:
As shown in FIG. 1, the electric heating rod 30 has the same structure, and includes an electric heating rod 30 bent in a U-shape, and a radiation fin 31 fixed spirally around the electric heating rod 30. Note that the radiation fins 31 have a slightly wavy shape.
The electric heating rod 30 has a temperature of 200 ° C.
Power of about 1/2 of the rated value is supplied.

A water pipe 6 is provided above the first evaporator 3A.
The outlet 6a of FIG. 2 (FIG. 2) faces, and the drain water W is supplied. Part of the drain water W flows down along the surface of the helical radiating fin 31 shown in FIG. 3, and is heated and evaporated by the heat of the first evaporator 3A. The remaining portion of the drain water W in FIG. 1 drops into the drain receiver 8 below the first evaporator 3A. The drain receiver 8 is provided below the first and second evaporation chambers 4A and 4B, and stores drain water W that has not been evaporated by the first and second evaporators 3A and 3B. In addition, the drain water W in the drain receiver 8 evaporates also by raising the temperature by the atmospheric temperature of the 1st and 2nd evaporation chambers 4A and 4B.

Below the second evaporator 3B, a flip-up machine (drain supply device) 9 is provided. The bouncing machine 9 is configured by attaching an impeller-shaped disk 91 to an output shaft of a motor 90 (FIG. 2), and bounces water in the drain receiver 8 obliquely upward toward the second evaporator 3B. Part of the drain water W splashed to the second evaporator 3B by the spring 9 evaporates while flowing down on the radiation fins 31 of the second evaporator 3B, and the remaining part of the drain water W is drained again. 8 is dropped.

The drain receiver 8 is provided with float switches 10A and 10B for detecting a lower limit and an upper limit. The float switch 10A for detecting the lower limit is configured such that the level of the drain water W in the drain receiver 8 in FIG.
It detects that it has become higher than 1, and outputs a lower limit detection signal to the controller 11. When the controller 11 receives the lower limit detection signal, the controller 11 drives the motor 90, thereby operating the flip-up machine 9.

On the other hand, the float switch 10 for detecting the upper limit
B detects that the liquid level of the drain water W in the drain receiver 8 has become too high, and accordingly, alarm means (not shown) sounds an alarm. Reference numeral 12 denotes an emergency drain pipe.

The air inlet 40 is provided with a blower 13. The blower 13 takes in air A from the outside of the drain water evaporator through the air inlet 40 and sends out the air A from the air outlet 50 to the outside of the drain water evaporator.

The first evaporation chamber 4A and the second evaporation chamber 4B are partitioned by a first water drop removing plate 21. The second evaporation chamber 4 </ b> B and the water droplet removal chamber 5 are partitioned by a second water droplet removal plate 22. A third water drop removing plate 23 is provided at an air outlet of the water drop removing chamber 5. Each of the water drop removing plates 21 to 23 includes, for example, a pair of stainless steel plates 20 having a large number of air passage holes 24,
A pair of stainless steel plates 20, 20 are arranged to face each other with the positions of the air passage holes 24 shifted from each other. Therefore, as shown in FIG. 4, the air A containing moisture passes through one air passage hole 24 of each of the water drop removing plates 21 to 23, passes between the two stainless steel plates 20, and passes through the air passage. It flows through the holes 24. At this time, since the air A collides with the pair of stainless steel plates 20, water droplets in the air are removed. In FIG. 1, the inner case 1
Among them, the water drop removing plates 21 to 23 are illustrated by solid lines.

Next, the drain water W of the drain water evaporator is
Will be described. First, the inlet 6 of the water pipe 6
Connect a drain pipe of a cooling device (not shown) to b. When the cooling device starts to operate, the drain water W flows into the water pipe 6,
Drain water W is supplied to the first evaporator 3A from the outlet 6a of the water pipe 6 in FIG. Part of the drain water W is supplied to the first evaporator 3
While evaporating while spirally flowing down along the radiating fins 31 of A, the remaining portion of the drain water W is dropped and stored on the drain receiver 8. Part of the drain water W in the drain receiver 8 evaporates naturally. On the other hand, the blower 13 takes in the air A from the air inlet 40 and
Blow toward zero. Therefore, the air A containing water flows from the first water drop removing plate 21 toward the second evaporation chamber 4B. At this time, since the air A collides with the first water droplet removing plate 21, water droplets not dissolved in the air A are removed from the first water droplet removing plate 2.
1 removed. Thereafter, the air A is supplied to the second evaporation chamber 4.
The air is exhausted to the outside of the drain water evaporator through B and the water droplet removing chamber 5, and at this time, the water droplets of the air A are also removed by the second water droplet removing plate 22 and the third water droplet removing plate 23. In particular, the temperature of the third water drop removing plate 23 is different from that of the other water drop removing plates 21,
Since it is lower than 22, dew condensation occurs on the third water drop removing plate 23, so that a part of the water dissolved in the air is also removed. Therefore, there is no possibility that the air A discharged to the outside of the drain water evaporating apparatus will be dewed.

Eventually, when the drain water W starts to accumulate in the drain receiver 8 and the liquid level reaches the lower operating limit level L1, this is detected by the float switch 10A, the flip-up device 9 is operated, and the drain of the drain receiver 8 is drained. The water W jumps up toward the second evaporator 3B. A part of the drain water W jumped up is the second
It evaporates while flowing down spirally along the radiating fins 31 of the evaporator 3B, and the remainder drops again into the drain receiver 8.

In the above-described configuration, the jumping-up device 9 is provided to evaporate the drain water W in the drainage receiver 8. However, if the jumping-up device 9 is constantly operated, the drainage treatment capacity is increased. At the same time, power consumption increases. On the other hand, on days with low humidity, the amount of drain water W generated is small,
Since the wastewater treatment capacity is not so large, power is wasted. In contrast, in the present embodiment, the drain catch 8
After drain water W accumulates in a predetermined amount or more,
Activate Therefore, the wastewater treatment capacity can be increased as required, and power consumption can be reduced.

Further, in this embodiment, since the radiating fins 31 in a spiral shape are provided around the electric heating rod 30, the time during which the drain water W touches the radiating fins 31 is long. Therefore, the drain water W can be efficiently evaporated without setting the temperatures of the first and second evaporators 3A and 3B to be much higher. The first and second evaporators 3A, 3A
Since B is marketed not as an evaporator but as a heater, the manufacturing cost is also reduced.

Further, the first and second evaporators 3A, 3B
It is not necessary to increase the temperature of the outer case 2 by a small amount, and the heat insulating space S is provided between the outer case 2 and the inner case 1, so that the surface temperature of the outer case 2 can be lowered.

In the above embodiment, as shown in FIG. 4, two stainless steel plates 20 are used to remove the first water droplet removing plate 21 (2).
2 and 23), the water drop removing plate is shown in FIG.
As shown in (b), a plurality of stainless steel plates 30 may be provided like blinds. Further, the water drop removing plate can be formed by providing a large number of small holes in one plate.

Further, the evaporator may be bent in a U-shape as shown in FIG. 6A, or may be bent as shown in FIG. 6B. Further, as the structure of the evaporator, another structure can be employed as long as the drain water W can be evaporated.

In the above embodiment, the inside of the outer case 2 of FIG. 1 is divided into three chambers 4A, 4B, 5; however, it is not always necessary to do so. For example, the bouncer 9 may be provided in the first evaporation chamber 4A, and the second evaporation chamber 4B may be omitted. In addition, the water droplet removal chamber 5 may be omitted, and only the first evaporation chambers 4A and 4B may be provided. In this case, the second evaporation chamber 4B constitutes a water droplet removal chamber. Furthermore, it is also possible to provide only the first evaporation chamber 4A without providing the second evaporation chamber 4B and the water droplet removal chamber 5.

Further, in the above embodiment, the float switches 10A and 10B are employed as the liquid level detectors, but the liquid level detectors detect the weight of the drain water in addition to the optical sensor and the ultrasonic sensor. Is also good. Further, in the above-described embodiment, a flip-up type is employed as the drainage supply device. However, in the present invention, a drainage supply device including a motor, a pump, and a hose may be employed. In the above-described embodiment, the blower 13 is provided at the air intake 40, but the blower 13 may be provided at another place such as at the air outlet 50. Further, in the above embodiment, the drain water evaporator is provided separately from the cooling device. However, the drain water evaporator may be incorporated in the cooling device. Alternatively, the water pipe 6 may be branched into two branches, and a pair of outlets 6a may be provided to supply drain water to the evaporator 3A (3B) from the two outlets 6a.

[0028]

As described above, according to the present invention,
In the drain water evaporator that evaporates and treats the drain water, the air containing water collides with the water drop removing plate,
Water droplets in the exhaust can be removed. Claim 2
According to the invention, the water drop removing chamber is provided downstream of the evaporation chamber, and the water drop removing plate is provided at each of the air inlet and the outlet of the water drop removing chamber, so that the reliability of water drop removal is improved. further,
According to the third aspect of the present invention, when the level of the drain water in the drain receiver becomes high, the drain water is supplied to the evaporator by the drain feeder, so that the processing capacity can be increased as necessary. At the same time, power consumption can be reduced. Also,
According to the invention of claim 4, since the inner case for housing the evaporator is housed in the outer case, the surface temperature of the outer case is reduced. According to the fifth aspect of the present invention, since the evaporator is provided with a spiral radiating fin around the electric heating rod, the drain water flows spirally along the radiating fin. Evaporation can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a drain water evaporator showing one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the same.

FIG. 3 is an enlarged perspective view showing a part of the evaporator.

FIG. 4 is a cross-sectional view showing a flow of air in a water drop removing plate.

FIG. 5 is a cross-sectional view and a perspective view showing another example of the water drop removing plate.

FIG. 6 is a schematic side view showing another shape of the evaporator.

[Explanation of symbols]

 1: inner case 2: outer case 3A, 3B: evaporator 30: electric heating rod 31: radiating fins 4A, 4B: evaporating chamber 5: water drop removing chamber 6: water pipe 8: drain receiver 9: drain feeder (bouncer) 10A: Liquid level detector 13: Blower 21 to 23: Water drop removing plate W: Drain water

Claims (5)

[Claims] 1. A drain water evaporator for evaporating drain water introduced from a water guide pipe in an evaporation chamber by an evaporator and discharging air containing moisture in the evaporation chamber by a blower, wherein the flow of the air containing moisture is A drain water evaporator, wherein a water droplet removing plate for removing water droplets by colliding the air is provided on a road. 2. A drain water evaporator for evaporating drain water introduced from a water guide pipe in an evaporation chamber by an evaporator and discharging air containing moisture in the evaporation chamber by a blower, wherein water droplets are removed downstream of the evaporation chamber. Chambers, and an air inlet to the water drop removing chamber and an air outlet from the water drop removing chamber are each provided with a water drop removing plate for colliding the water containing water to remove water drops. A drain water evaporator. 3. The drain water evaporator according to claim 1, wherein the drain water evaporator evaporates the drain water by elevating the temperature thereof, and a drain receiver storing the non-evaporated drain water below the evaporator. A drain supply device that supplies drain water from the drain receptacle to the evaporator; and a liquid level detector that detects that the liquid level of the drain receptacle has become higher than a predetermined liquid level. The drain water evaporator is operated when the liquid level becomes higher than the liquid level of the drain water evaporator. 4. The drain water evaporator according to claim 1, wherein the drain water evaporator includes an inner case accommodating the evaporator, and an outer case accommodating the inner case. 5. The evaporator according to claim 1, wherein the evaporator is provided with a helical radiating fin around an electric heating rod, and supplies drain water from the water guide pipe to an upper portion of the evaporator to supply the drain water. Drain water evaporator in which the fluid flows along spiral radiating fins.