JP3141329B2 - Method and apparatus for producing fresh water and cold air - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and an apparatus for producing cold air together with fresh water.

(Prior Art) Prior to the present application, the fresh water producing method and the apparatus therefor use a vacuum pump to make an evaporation chamber in a vacuum state, promote the evaporation of raw water such as seawater, and promote the fresh water production.

As one example, Japanese Utility Model Laid-Open No. 1-107488 is pointed out.

(Problem to be Solved by the Invention) In the above-mentioned conventional method, it is necessary to maintain the evaporating chamber in a reduced pressure state, and since the evaporating chamber is usually connected to a vacuum pump, the structure of the fresh water generator becomes complicated. In addition, the cost increases.

Further, in the above-mentioned publication, a fin of a cooling pipe is arranged in a condensation chamber, and a lapillin packing is provided between an upper surface of an uppermost fin and a lower surface of a horizontal member of the condensation chamber in order to maintain a reduced pressure in the evaporation chamber. Since such a sealing means is required, the number of parts increases, the number of assembling steps increases, and the cost is high.

In addition, the cooling water pump that supplies cooling water to the hollow inside of the cooling pipe and the water supply pump that supplies raw water into the condensing chamber are used separately. Take it.

A main object of the present invention is to produce fresh water with cold air using raw water without using a vacuum pump.

B. Configuration of the Invention (Means for Solving the Problems) In order to solve the above problems, raw water is supplied to an indirect contact-type closed heat exchanger constituting a condensing section, and the heat exchanger is cooled while flowing down. Indirect contact with saturated humid air having a higher temperature than raw water in a cross-flow manner to cool the saturated humid air, separate moisture in the air as condensed water, and change the saturated humid air to low-humidity cold air, The heated raw water heated by heat exchange is supplied to a sprinkling portion in an evaporator provided on the upstream side of the heat exchanger to generate the saturated humid air. Direct contact with outside air, which is considerably hotter than saturated humid air, in countercurrent
A method for producing fresh water and producing cold air, characterized in that a part thereof is evaporated and the air containing the moisture is sent as the saturated humid air to the primary side of the indirect contact heat exchanger.

The heat exchanger is characterized in that a plurality of heat exchange plates formed inside a meandering raw water passage are vertically arranged in parallel, and a hot air exclusive passage is formed between the adjacent heat exchange plates. And a method for generating cold air.

The raw water was seawater or groundwater of about 20 ° C, pumped up to the upper part of the heat exchanger by a pump, sprayed on the filler, and changed the outside air of about 40 ° C to saturated humid air of about 28 ° C. Thereafter, it is preferable that the raw water is returned to the sea surface or the ground surface at approximately 27 ° C. and reused for recirculation.

Next, a device invention, which is a related invention for carrying out the method invention, includes a vertical portion and a horizontal portion extending horizontally from the upper portion at substantially right angles to the vertical portion. A counter-current evaporator is provided in the horizontal part, and an indirect contact-type closed heat exchanger is installed in the horizontal part as a condensing part, and a pump for pumping raw water onto the heat exchanger is provided. A secondary side of a pump and a primary side of a raw water passage of the heat exchanger are connected by a raw water supply pipe, and an air passage coexisting with the raw water passage is formed in the heat exchanger. Side is open to the saturated humid air discharge section side of the evaporating section that generates saturated humid air, and the raw water passage of the raw water passage is formed in the raw water spray portion of the evaporator section located near the upstream side of the saturated humid air discharge section. Secondary side connected, indirect Immediately below the air passage of the tactile and sealed heat exchanger, a fresh water reservoir for receiving fresh water condensed and dropped in indirect contact with the saturated humid air and raw water is provided at the bottom of the horizontal portion of the case, An air flow outlet of the indirect contact heat exchanger is provided at one end of a horizontal portion of the case on a secondary side of an air passage, and the apparatus for producing fresh water and cool air is provided.

The heat exchanger is characterized in that a plurality of heat exchange plates each having a meandering raw water passage formed therein are vertically arranged in parallel, and a hot air exclusive passage is formed between the adjacent heat exchange plates. preferable.

The raw water is seawater or groundwater of about 20 ° C., pumped to the upper part of the heat exchanger by a pump, and sprayed on the filler disposed below the sprinkling part to reduce the outside air of about 40 ° C. to 28 ° C. It is preferable to provide a raw water circulation system for returning the raw water to approximately 27 ° C. and returning to the sea surface or the ground surface and recirculating the raw water after changing to about C saturated wet air.

The operation of the device of the related invention is substantially the same as that of the specific invention, and the description thereof is omitted.

(Embodiment) Next, a representative embodiment of the device invention described in claims 4 to 6 will be described.

In FIG. 1, A shows a whole of a fresh water generating and cooling air generating apparatus, and a case 10 has a whole inverted L-shape including a vertical part 11 and a horizontal part 12 extending horizontally from the upper part 11a at a substantially right angle. Is formed.

A countercurrent evaporator B is provided in the vertical portion 11 of the case 10, and an indirect contact-type heat exchanger 13 is provided in the horizontal portion 12 as a condenser C. . Further, the secondary side of a pump P for pumping raw water onto the heat exchanger 13 and the primary side of the raw water passage 14 of the heat exchanger 13 are connected by a raw water supply pipe 23, and the raw water passage 14 Coexisting air passages separated by heat conducting plates
15 is formed in the heat exchanger 13 (see FIGS. 2 and 3), and the primary side of the air passage 15 is located on the side of the saturated humid air discharge section 16 of the evaporating section B which generates saturated humid air. The raw water spraying section (sprinkling pipe in the drawing) 17 of the evaporating section B which is open and located near the upstream side of the saturated wet air discharging section 16
The secondary side of the raw water passage 14 is connected to, and directly below the air passage 15 of the indirect contact type closed heat exchanger 13 receives fresh water condensed and dropped by the indirect contact of the saturated moist air and the raw water. A fresh water reservoir D is provided at the bottom of the horizontal portion 12 of the case 10, and the air flow outlet 18 of the indirect contact heat exchanger 13 is located on the secondary side of the air passage 15 in the horizontal portion of the case 10.
It is provided at one end of twelve. A blower 20 is provided at the discharge port 18.

In particular, the heat exchanger 13 is composed of a plurality of heat exchange plates 19 formed inside a meandering raw water passage 14a (corresponding to the raw water passage 14), and the heat exchanger plates 19 are adjacent to each other.
A hot air passage 15a (corresponding to the air passage 15) is formed therebetween (see FIGS. 2 and 3).

Further, the raw water is seawater or groundwater of about 20 degrees C,
The pump P is pumped to the upper part of the heat exchanger 13,
After spraying on the filler 21 in the evaporating section B disposed below the sprinkling section 17 and changing the outside air of about 40 ° C to about 28 ° C saturated humid air, the raw water becomes approximately 27 ° C. A raw water circulation system F is provided for returning to the sea surface or the ground surface for recirculation.

Further, an eliminator 22 is disposed above the raw water spraying section 17.

The operation of the embodiment configured as described above will now be described as a typical embodiment of the method invention according to claims 1 to 3.

First, seawater or groundwater at about 20 ° C. is used as raw water, and the raw water is supplied to the indirect contact type closed heat exchanger 13 by the pump P. Next, the blower 2 is moved down the raw water passage 14 (= 14a) of the heat exchanger 13.
In operation 0, the raw water is indirectly contacted with the saturated humid air having a higher temperature (for example, 28 ° C.) than the raw water flowing horizontally in the air passage 15 (= 15a) in a cross-flow manner, and the saturated humid air is cooled and cooled. Water as condensed water, and the saturated humid air is changed into low-humidity cold air, and the heated raw water heated by heat exchange is upstream of the heat exchanger 13 to generate the saturated humid air. Is supplied to the raw water spraying section 17 in the evaporating section B provided in the above, and is sprayed from the raw water spraying section 17 onto the filler 21 to be considerably higher than the saturated humid air (for example, 40
(° C.) in direct contact with the outside air in a countercurrent manner, a part of which is evaporated, and the air containing this moisture is sent to the primary side of the indirect contact heat exchanger 13 as the saturated wet air.

The low-humidity cold air (cool air) generated in this way is discharged from the airflow discharge port 18 of the case 10, and is appropriately used as air conditioning or cold air in a plant growing room.

The fresh water that is condensed and dropped is temporarily received in the fresh water reservoir D, and the fresh water is used as drinking water or watering for plant growth.

The raw water becomes heated water of about 27 ° C. while flowing down on the filler 21 and is returned to the sea surface or the surface by the raw water circulation system F for recirculation.

C. According to the method of the present invention described in claims 1 to 3, the above configuration does not require a vacuum pump at all, and does not provide a sealing structure therefor. Fresh water can be produced from raw water passing through the condensing section, and low-humidity cold air can be generated simultaneously with fresh water.

By using this cool air and fresh water, plant growth can be promoted in desert areas where natural water is scarce and can contribute to greening.

Furthermore, this cold air can be used for air conditioning, and it can be used as drinking water by converting it into fresh water to evaporate and condense raw water once.

In particular, in the invention described in claim 3, fresh water and groundwater can be recycled.

Next, in the device invention according to claims 4 to 6,
By being able to carry out the method invention and making the heat exchanger a constituent element, fresh water can be easily produced from raw water and also cool air can be generated.

In particular, according to the fifth aspect of the invention, the structure of the heat exchanger can be further simplified, and even if the hot air passage is clogged, it can be easily resolved by removing the heat exchange plate.

In the invention according to claim 6, seawater or groundwater can be effectively recycled.

If a known solar energy is used as a drive source of the pump 20 and the blower 20 installed at the airflow outlet 18, it is possible to contribute to energy saving of the whole apparatus and use in desert areas where power generation facilities are scarce. Will be the best.

[Brief description of the drawings]

1 is a schematic view of an embodiment of the apparatus, FIG. 2 is a front view of a heat exchanger in a condensing section, and FIG. 3 is a side view partially omitted. Description of main symbols in the figure B: evaporating section, C: condensing section.

Continuation of the front page (56) References JP-A-52-23749 (JP, A) JP-A-59-26184 (JP, A) JP-A-1-1399993 (JP, A) JP-A-1-269896 (JP) , A) Hikaru 1-107488 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) C02F 1/04 F25D 1/02 F28C 1/04 F28D 3/02

Claims (6)

(57) [Claims] 1. A raw water is supplied to an indirect contact-type closed heat exchanger constituting a condensing section, and this heat exchanger is indirectly contacted with saturated humid air having a higher temperature than the raw water in a cross-flow manner while flowing down. hand,
In order to cool the saturated humid air and separate the moisture in the air as condensed water, and to change the saturated humid air to cool air, the heated raw water heated by heat exchange is used to generate the saturated humid air. The water is supplied to the water spray portion in the evaporator provided on the upstream side of the heat exchanger, and is sprayed on the filler from the water spray portion, and is brought into direct contact with the outside air having a considerably higher temperature than the saturated humid air in a countercurrent manner, A method for producing fresh water and producing cold air, wherein a part of the air is evaporated and the air containing the moisture is sent to the primary side of the indirect contact heat exchanger as the saturated humid air. 2. The heat exchanger according to claim 1, wherein a plurality of heat exchange plates having meandering raw water passages formed therein are vertically arranged in parallel, and a passage dedicated to hot air is formed between adjacent heat exchange plates. The method for producing fresh water and producing cold air according to claim 1, characterized in that: 3. The method according to claim 1, wherein the raw water is seawater or groundwater at about 20 ° C., and pumped to the upper part of the heat exchanger by a pump.
After changing the outside air of about 40 degrees C to about 28 degrees C saturated humid air by spraying on the filler material, returning the raw water to about 27 degrees C and returning it to the sea surface or the ground surface for recirculation. 3. The method for producing fresh water and producing cold air according to claim 1 or 2, wherein the method comprises the steps of: 4. A counter-current evaporator is provided in the vertical portion in a general inverted L-shaped case comprising a vertical portion and a horizontal portion extending horizontally from the upper portion substantially at right angles thereto. At the same time, an indirect contact type closed heat exchanger is installed as a condensing part in the horizontal part, and the secondary side of a pump for pumping raw water onto the heat exchanger and the raw water of the heat exchanger. The primary side of the passage is connected by a raw water supply pipe, an air passage coexisting with the raw water passage is formed in the heat exchanger, and the primary side of the air passage is connected to the evaporating section that generates saturated humid air. The secondary side of the raw water passage is open to the saturated humid air discharge part side, and the secondary side of the raw water passage is connected to the raw water spraying part of the evaporating part located near the upstream side of the saturated humid air discharge part, and is indirect contact type and hermetically sealed. Right under the air passage of the heat exchanger A fresh water reservoir for receiving fresh water that is condensed and dropped by indirect contact of the saturated moist air and raw water is provided at the bottom of the horizontal portion of the case, and an air flow outlet of the indirect contact heat exchanger is an air passage. A fresh water generation and cold air generation device, which is provided at one end of a horizontal portion of the case on a secondary side. 5. The heat exchanger according to claim 1, wherein a plurality of heat exchange plates each having a meandering raw water passage formed therein are vertically arranged in parallel, and a dedicated passage for hot air is formed between the adjacent heat exchange plates. The fresh water and cold air generator according to claim 4, characterized in that: 6. The method according to claim 6, wherein the raw water is seawater or groundwater at about 20 ° C., and is pumped to the upper part of the heat exchanger by a pump.
Sprinkle over the filler material located below the watering section 40
After changing the outside air of about C to about 28 C saturated humid air, a raw water circulation system for returning the raw water to about 27 C and returning to the sea surface or the ground surface for recirculation is provided. 5. The apparatus for producing fresh water and cold air according to claim 4.