CN110448930B

CN110448930B - Water making device

Info

Publication number: CN110448930B
Application number: CN201910379313.5A
Authority: CN
Inventors: 池田充志
Original assignee: Sasakura Engineering Co Ltd
Current assignee: Sasakura Engineering Co Ltd
Priority date: 2018-05-08
Filing date: 2019-05-08
Publication date: 2022-07-26
Anticipated expiration: 2039-05-08
Also published as: KR20190128552A; KR102619254B1; JP2019195750A; CN110448930A; TWI796449B; JP7129041B2; TW202003082A

Abstract

The invention provides a water making device capable of easily improving water making efficiency. A water producing device (1) comprises: a plurality of evaporators (10, 20) for heating the liquid to be treated to generate steam; and a condenser (30) that condenses the vapor generated in the evaporators (10, 20), wherein the evaporators (10, 20) have a plurality of heat transfer tubes (15, 25) extending in the vertical direction, and the liquid to be treated introduced into the heat transfer tubes (15, 25) can be heated by the fluid for heating introduced into the outside of the heat transfer tubes (15, 25), and wherein the plurality of evaporators (10, 20) are disposed adjacent to each other in the horizontal direction, and the evaporators (10, 20) are connected in sequence such that the vapor of the liquid to be treated generated in the preceding evaporator (10) is introduced into the succeeding evaporator (20) as the fluid for heating in the succeeding evaporator (20), and wherein the condenser (30) is disposed so as to condense the vapor generated in the succeeding evaporator (20).

Description

Water making device

Technical Field

The present invention relates to a water generating apparatus, and more particularly, to a water generating apparatus suitable for use in a ship.

Background

In a conventional marine water generator, fresh water is produced by evaporating seawater using steam from a boiler (boiler) of a ship, cooling water from a diesel engine, or the like as a heat source. For example, patent document 1 discloses a water generator in which a heater for heating seawater to generate steam is disposed at a lower portion and a condenser for condensing the steam generated by the heater is disposed at an upper portion. The heater has a heating tube bundle for passing seawater, and supplies cooling water cooled by the engine as a heating source to the outside of the heating tube bundle to heat the seawater and generate steam.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 51-66280

Disclosure of Invention

Technical problem to be solved by the invention

Recently, the amount of waste heat of jacket cooling water of an engine tends to be reduced due to the downsizing and high efficiency of a diesel engine main unit, and the amount of water required on a ship tends to be increased due to the strengthening of measures against exhaust gas restriction. Therefore, the water generator for the ship is required to be installed in the ship while maintaining the miniaturization and to increase the amount of water to be generated.

The invention aims to provide a water making device capable of easily improving water making efficiency.

Means for solving the problems

The above object of the present invention can be achieved by a water generating apparatus comprising: a plurality of evaporators for heating a liquid to be treated to generate steam; and a condenser that condenses the steam generated in the evaporator, wherein the evaporator includes a plurality of heat transfer tubes extending in a vertical direction, and the fluid to be treated introduced into the heat transfer tubes can be heated by the heating fluid introduced into the outside of the heat transfer tubes, the plurality of evaporators are arranged adjacent to each other in a horizontal direction, the evaporators are connected to each other in sequence such that the steam of the fluid to be treated generated in the preceding evaporator is introduced into the succeeding evaporator as the heating fluid of the succeeding evaporator, and the condenser is arranged to condense the steam generated in the succeeding evaporator.

In the water generating apparatus, it is preferable that the evaporator includes a container body for housing the heat transfer pipe and a horizontally extending cylindrical tank provided above the container body, and ends of the tank are connected to each other via end plates to connect the evaporators.

Preferably, the demister further includes a flat plate-like demister disposed inside the tank, and the demister is preferably disposed horizontally so that the axis of the tank passes through the inside thereof.

Effects of the invention

According to the water producing apparatus of the present invention, the water producing efficiency can be easily improved.

Drawings

Fig. 1 is a longitudinal sectional view of a water producing apparatus according to an embodiment of the present invention.

Fig. 2 is a side view of the water producing apparatus shown in fig. 1.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a longitudinal sectional view of a water producing apparatus according to an embodiment of the present invention, and fig. 2 is a side view of the water producing apparatus shown in fig. 1 as viewed from a direction indicated by an arrow a. As shown in fig. 1 and 2, a water producing apparatus 1 of the present embodiment includes: a plurality of evaporators having a first evaporator 10 and a second evaporator 20; and a condenser 30.

First evaporator 10 includes a cylindrical container body 11 extending vertically, and a cylindrical case 16 provided above container body 11 and extending horizontally.

The lower opening and the upper opening of the container body 11 are covered with a bottom plate 12 and a closing plate 13, respectively, to form an evaporation chamber 11a inside. A plurality of insertion holes are formed in the bottom plate 12 and the closing plate 13, respectively, and a plurality of heat transfer pipes 15 extending vertically so as to penetrate the insertion holes are disposed in the evaporation chamber 11 a.

An introduction portion 14 is connected to the lower surface side of the bottom plate 12. The introduction portion 14 is formed in a disk shape and has an introduction chamber 14a therein. The introduction chamber 14a communicates with the lower end of the heat transfer pipe 15, and the liquid to be treated such as seawater introduced from the introduction port 14b rises inside the heat transfer pipe 15.

A supply port 11b and a discharge port 11c are formed in a side wall of the container body 11. The heating fluid such as warm water supplied from the supply port 11b into the evaporation chamber 11a passes through the outside of the heat transfer pipe 15 and is discharged from the discharge port 11 c. The evaporation chamber 11a is provided with a plurality of baffles 11d that meander the flow path of the heating fluid. Each baffle 11d is held at a predetermined height position by a cylindrical spacer (not shown) fitted around the heat transfer pipe 15. In the present embodiment, supply port 11b is formed in the upper portion of container body 11, and discharge port 11c is formed in the lower portion of container body 11, but it is also possible to form discharge port 11c in the upper portion of container body 11 and supply port 11b in the lower portion of container body 11 by reversing the arrangement of supply port 11b and discharge port 11c from the top to the bottom.

The box 16 is connected to the upper end of the container main body 11 via a closing plate 13, and both ends of a horizontally extending cylindrical shape are covered and sealed by

end plates

16a and 16b, and an air-water separation chamber 16c is formed inside. The gas-water separation chamber 16c is provided with: a gas-water separation plate 16d disposed directly above the heat transfer pipe 15; and a demister 16e disposed above the gas-water separation plate 16 d. The demister 16e is a flat plate-shaped member in which mesh plates are laminated, is horizontally disposed in the gas-water separation chamber 16c, and is fixed by a support member (not shown). The demister 16e is disposed at the center of the tank 16 in the vertical direction so that the axis L of the tank 16 passes through the inside.

A steam discharge port 16f through which the generated steam can be discharged is formed in an upper portion of the steam-water separation chamber 16 c. A drain port 16g capable of discharging the liquid separated from the steam is formed in a lower portion of the moisture separation chamber 16 c.

The second evaporator 20 is configured in the same manner as the first evaporator 10, and includes a cylindrical container body 21 extending vertically, and a cylindrical tank 26 provided above the container body 21 and extending horizontally.

The lower opening and the upper opening of the container body 21 are covered with a bottom plate 22 and a closing plate 23, respectively, so that an evaporation chamber 21a is formed inside. A plurality of insertion holes are formed in the bottom plate 22 and the closing plate 23, respectively, and a plurality of heat transfer pipes 25 extending vertically so as to penetrate these insertion holes are disposed in the evaporation chamber 21 a.

An introduction portion 24 is connected to the lower surface front side of the bottom plate 22. The introduction portion 24 is formed in a disk shape and has an introduction chamber 24a therein. The introduction chamber 24a communicates with the lower end of the heat transfer pipe 25, and the liquid discharged from the drain port 16g of the first evaporator 10 is introduced from the introduction port 24b and rises inside the heat transfer pipe 25.

A supply port 21b and a discharge port 21c are formed in a side wall of the container body 21. The supply port 21b is connected to the vapor discharge port 16f of the first evaporator 10 via the connection pipe 17, and the vapor supplied from the first evaporator 10 into the evaporation chamber 21a passes through the outside of the heat transfer pipe 25 and is discharged from the discharge port 21 c. The evaporation chamber 21a is provided with a plurality of baffles 21d for meandering the flow path of the heating fluid. Each baffle 21d is held at a predetermined height position by a cylindrical spacer (not shown) fitted around heat transfer pipe 25.

The tank 26 is connected to the upper end of the container main body 21 via the closing plate 23, and one end side of a horizontally extending cylindrical shape is connected to the tank 16 of the first evaporator 10 along the axis L via the end plate 16 b. The other end side of the case 26 is covered and sealed with an end plate 26 a. The inside of the case 26 is partitioned by a partition wall 26b, and an air-water separation chamber 26c is formed at one end side of the partition wall 26 b. The gas-water separation chamber 26c is provided with: a gas-water separation plate 26d disposed directly above the heat transfer pipe 25; and a demister 26e disposed above the gas-water separation plate 26 d. The demister 26e is a flat plate-like member in which mesh plates are laminated, is horizontally disposed in the gas-water separation chamber 26c, and is fixed by a support member (not shown). The demister 26e is disposed at the center of the tank 26 in the vertical direction so that the axis L of the tank 26 passes through the inside. A drain port 26g capable of discharging the liquid separated from the steam is formed in a lower portion of the steam-water separation chamber 26 c.

The condenser 30 is provided inside the case 26, and includes a condensation chamber 31 formed on the other end side of the partition 26b in the case 26, and a condensation pipe 32 disposed in the condensation chamber 31. The moisture separation chamber 26c and the condensation chamber 31 communicate with each other through the upper portion of the partition wall 26 b. An air extraction port 26f is formed in an upper portion of the condensation chamber 31, and a recovery port 26h for recovering condensed water (fresh water) generated in the condensation chamber 31 is formed in a lower portion of the condensation chamber 31. An inlet 32a and an outlet 32b communicating with the outside of the tank 26 via an end plate 26a are provided at both ends of the condensation duct 32.

In the water generator 1 having the above-described configuration, seawater as a liquid to be treated is supplied to the condensation pipe 32 of the condenser 30 through the ejector 40 by the operation of the pump 41, and after the steam in the condensation chamber 31 is condensed, a part of the seawater is introduced into the introduction chamber 14a of the first evaporator 10 and passes through the interior of the heat transfer pipe 14. The condensation chamber 30 may be provided with a preheater having one or more heat transfer pipes, and may be configured to introduce a part of the seawater used for condensation of the steam into the preheater, preheat the seawater, and introduce the preheated seawater into the introduction chamber 14 a. The preheater may be disposed in the gas-

water separation chambers

16c and 26c, or in a plurality of positions as described above, in addition to the condensation chamber 30.

Hot water usable on site, such as jacket cooling water of a diesel engine unit mounted on a ship, for example, is supplied as a heating fluid from the supply port 11b to the evaporation chamber 11a of the first evaporator 10, and is discharged from the discharge port 11c via a flow path formed by the damper 11 d. Thereby, the seawater passing through heat transfer pipe 14 is heated and evaporated in heat transfer pipe 14, and is introduced into moisture separation chamber 16 c.

The steam introduced into the moisture separator 16c is separated into liquid droplets by the moisture separator 16d and the demister 16e, and then discharged from the drain port 16g and introduced into the introduction chamber 24a of the second evaporator 20, and passes through the inside of the heat transfer pipe 25. In the present embodiment, the demister 16e is horizontally disposed at the center in the vertical direction so that the axis L of the tank 16 passes through the inside thereof, and therefore, the surface area of the demister 16e can be maximized, and liquid droplets can be reliably removed to improve the water generation efficiency. However, the arrangement of the demister 16e is not particularly limited to this, and for example, the demister 16e may be arranged at a position above or below the axis L of the tank 16. In order to adjust the difference in evaporation temperature between the first evaporator 10 and the second evaporator 20, an orifice (installation) may be provided between the drain port 16g and the introduction port 24 b.

On the other hand, the steam in the steam-water separation chamber 16c is discharged from the discharge port 16f, supplied as a heating fluid to the supply port 21b of the second evaporator 20, then turned into fresh water through the flow path formed by the baffle 21d, and discharged from the discharge port 21 c. Thereby, the seawater passing through heat transfer pipe 25 is heated and evaporated in heat transfer pipe 25, and introduced into moisture separation chamber 26 c.

The steam introduced into the steam-water separation chamber 26c is separated into liquid droplets by the steam-water separation plate 26d and the demister 26e, and then introduced into the condensation chamber 31 of the condenser 30, and a part of the steam is condensed by the seawater passing through the condensation pipe 32. In this way, the steam generated in the second evaporator 20, which is the second-stage evaporator, is condensed by the condenser 30 to become fresh water. The fresh water generated in the condensation chamber 31 is merged with the fresh water supplied from the discharge port 21c of the second evaporator 20, and is recovered from the recovery port 26h by the operation of the pump 27.

The non-condensable gas derived from the steam and seawater not condensed in the condensation chamber 31 is discharged from the steam discharge port 26f, and is sucked into the suction port of the ejector 40 together with the seawater discharged from the water discharge port 26g, and is supplied to the condensation pipe 32 of the condenser 30.

According to the water generating apparatus 1 of the present embodiment, the first evaporator 10 and the second evaporator 20 have the plurality of

heat transfer pipes

15 and 25 extending vertically and are arranged adjacent to each other in the horizontal direction to constitute a double effect type evaporation apparatus, and therefore, a compact configuration with a small capacity can be used to obtain high water generating efficiency. Therefore, the present invention can be applied to ships and the like.

Further, since the first evaporator 10 and the second evaporator 20 have horizontally extending

cylindrical cases

16 and 26 above the

container bodies

11 and 21 accommodating the

heat transfer pipes

15 and 25, and the end portions of the

cases

16 and 26 are connected to each other via the end plate 16b, the first evaporator 10 and the second evaporator 20 can be easily connected.

Since the second evaporator 20 and the condenser 30 have the same configuration as a conventional single-effect marine water generating apparatus, they can be connected to the first evaporator 10, for example, through a maintenance port formed at one end of the tank 26 of the second evaporator 20. This makes it possible to easily change the conventional single-effect water producing apparatus to the double-effect type, and thus, it is possible to cope with the increase and the like.

While one embodiment of the present invention has been described in detail, the specific embodiment of the present invention is not limited to the above embodiment. For example, although the water generating apparatus 1 of the present embodiment is of the double effect type, a multiple effect water generating apparatus of three or more times can be easily configured by connecting one or more evaporators having the same configuration as the first evaporator 10 in order in the horizontal direction via the end plate 16 a. Therefore, the design and the manufacture can be efficiently performed according to the required water production amount.

Description of the reference numerals

1 Water producing device

10 first evaporator

11 Container body

15 heat conduction pipe

16 case

16a, 16b end plate

16e demister

20 second evaporator

21 container body

25 heat conducting pipe

26 case

26e demister

30 a condenser.

Claims

1. A water generating apparatus for a ship, comprising: a plurality of evaporators for heating a liquid to be treated to generate steam; and a condenser for condensing the steam generated in the evaporator, the water generating apparatus for a ship being characterized in that:

the evaporator has a plurality of heat transfer tubes extending vertically, and can heat the treatment target liquid introduced into the heat transfer tubes by the heating fluid introduced to the outside of the heat transfer tubes,

a plurality of evaporators arranged adjacent to each other in the horizontal direction, the evaporators being connected in series so that the vapor of the liquid to be treated generated in the evaporator of the preceding stage is introduced into the evaporator of the succeeding stage as a heating fluid for the evaporator of the succeeding stage,

the condenser is configured to condense steam generated at the evaporator of the final stage,

the evaporator comprises a container body for accommodating the heat transfer pipe and a cylindrical box body which is arranged above the container body and extends horizontally,

the plurality of evaporators are connected in series in the horizontal direction by connecting the ends of the case to each other via end plates.

2. The marine water generating apparatus according to claim 1, wherein:

further comprises a flat plate-like demister disposed inside the tank,

the demister is horizontally disposed in such a manner that an axis of the tank passes through the inside thereof.