JPH0141445Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a relatively small-sized distilled water production apparatus suitable for obtaining high purity distilled water mainly used in the pharmaceutical industry and the like.

(Prior art) In a general relatively small distilled water production device, 1
A configuration is adopted in which a heat exchanger is used to heat the feed water by one heat exchange from heated steam, and water vapor is obtained from the feed water. However, in this configuration, the generated water vapor is simply cooled using cooling water or the like to obtain distilled water, and the amount of heat contained in the generated water vapor cannot be effectively utilized. Therefore, this configuration has poor thermal efficiency, resulting in an increase in the production cost of distilled water.

On the other hand, large-scale distilled water production apparatuses employ a configuration in which a plurality of heat exchangers are provided and water vapor generated in some of them is used as a heating medium.
According to this configuration, although the heat possessed by the generated water vapor can be effectively utilized, not only a large space is required, but also a large number of heat exchangers must be used, which makes the device expensive.

(Problems to be Solved by the Invention) The above-mentioned small-sized distilled water production apparatus requires a small installation space, but has a problem in that the production cost of distilled water increases due to poor thermal efficiency. On the other hand, although the above-mentioned large-scale distilled water production apparatus has good thermal efficiency, it requires a large installation space and also has the problem that the apparatus is expensive.

The present invention aims to solve the above problems and provide a distilled water production device that is inexpensive, requires a small installation space, has good thermal efficiency, and can produce distilled water at low cost. .

(Means for solving the problem) The present invention provides a first supply water chamber at the lower end into which supply water as a heated medium is introduced, and uses heated steam as a heating medium above the first supply water chamber. A first heat exchanger main body is provided, a first steam chamber is provided above the first heat exchanger main body, a second supply water chamber is provided above the first steam chamber across a partition wall, and a second supply water chamber is provided above the first steam chamber with a partition wall in between. A second heat exchanger main body is provided above, a second steam chamber is provided above the second heat exchanger main body, and the first steam chamber and the second heat exchanger main body are communicated with each other. This distilled water production apparatus is characterized in that the steam generated in the second heat exchanger body is used as a heating medium for the second heat exchanger body.

(Example) In FIG. 1, a pipe 11 whose upstream side is connected to a pressurizing pump (not shown) has a solenoid valve 12, a flow meter 13, and a check valve 14 in the middle.
The tip of the preheater 15 is connected to the heated medium inlet of the preheater 15. The heated medium outlet of the preheater 15 communicates with a first supply water chamber 21 provided at the lower end of the heat exchanger 20 via a pipe 17 having a flow rate regulating valve 16 in the middle.

The heat exchanger 20 is an elongated member extending vertically, and the lower end of the first heat exchanger main body 22 is fixed to the upper end of a bowl-shaped first supply water chamber 21 that opens upward. The first heat exchanger main body 22 has a large number of heat transfer tubes 23 arranged vertically in a cylindrical case, and has a heating medium inlet 24 on the side surface of the upper end. A pipe 26 having a solenoid valve 25 in the middle is connected to the heating medium inlet 24, and heated steam is supplied to the first heat exchanger main body 2 as a heating medium through the pipe 26.
2. A pipe 28 having a steam trap 27 in the middle is connected to the side surface of the lower end of the first heat exchanger main body 22, and the other end of the pipe 28 is connected to the heating medium inlet of the preheater 15. A drain pipe 29 for discharging the heating medium is connected to the side surface of the lower end of the preheater 15.

A cylindrical member 30 is fixed concentrically to the upper end of the first heat exchanger main body 22, and a first steam chamber 31 is provided in the lower part of the cylindrical member 30 via a partition wall 32 extending in the radial direction. A second supply water chamber 33 is formed at the upper end. The upper end of the heat transfer tube 23 opens at the lower end of the first steam chamber 31, and the pipe 34 connected to the upper side of the first steam chamber 31 opens at an inlet provided at the lower end of the gas-liquid separator 35. are doing. A liquid outlet provided at the end of the gas-liquid separator 35 communicates with a level tank 36 located below via a pipe 37. The lower end of the level tank 36 is connected to the piping 1 between the flow rate adjustment valve 16 and the first supply water chamber 21 via the piping 38.
It is connected to 7. Further, the level tank 36 is arranged such that the level of the upper end of the heat transfer tube 23 is located at an intermediate portion of the level tank 36 in the vertical direction. The level tank 36 has a level switch 39, and the level switch 39 is electrically connected to the solenoid valve 12. Level switch 39 is level tank 3
When the liquid accumulated in the heat transfer tube 6 rises above the level of the upper end of the heat transfer tube 23, the solenoid valve 12 is operated in the direction of closing.

At the upper end of the cylindrical member 30 is a first heat exchanger body 22.
A second heat exchanger main body 40 having the same shape is fixed. Similarly, the second heat exchanger main body 40 has a large number of heat transfer tubes 41 arranged vertically in a cylindrical case, and a heating medium inlet 42 on the side surface of the upper end is connected to the gas-liquid separator 35 through a pipe 43. It is connected to a steam outlet provided at the upper end of the A bottom-opening bowl-shaped second steam chamber 44 is fixed to the upper end of the second heat exchanger main body 40 , and the upper end of the second steam chamber 44 is connected to the inlet of the gas-liquid separator 45 . Gas-liquid separator 45
A liquid outlet provided at the lower end of the tank communicates with a level tank 46 located below via a pipe 47. The lower end of the level tank 46 communicates with the inlet of the second supply water chamber 33 via piping 48, and the level tank 46 is arranged so that the level of the upper end of the heat transfer tube 41 is located at an intermediate portion of the level tank 46 in the vertical direction. It is located in The level tank 46 has a level switch 49, and the level switch 49 has a solenoid valve 5.
electrically connected to 0. level switch 4
9, the liquid accumulated in the level tank 46 is transferred to the heat transfer tube 41
When the level rises above the upper end level, the solenoid valve 50 is operated in the direction of opening. In addition, piping 4
A bypass 51 is provided that directly communicates the pipe 7 and the pipe 48, and a pipe 52 that communicates with the first water supply chamber 21 is further connected to the pipe 48. The pipe 52 has an orifice 53 in the middle for adjusting the flow rate. Further, the lower end of the heat exchanger tube 41 is opened.
A check valve 54 is provided on the side of the lower end of the supply water chamber 33.
A pipe 55 having the electromagnetic valve 50 is connected thereto.

A vapor outlet of the gas-liquid separator 45 communicates with an upper end inlet of a cooling device 61 via a pipe 60. A spiral cooling pipe 62 is disposed within the cooling device 61, and cooling water flows through the cooling pipe 62 from the lower end to the upper end. A pipe 63 for taking out distilled water is connected to the lower end of the cooling device 61.
The lower end side of the pipe 63 is connected to manufacturing equipment for pharmaceutical products, etc. (not shown). A pipe 64 is further connected to the lower end of the cooling device 61, and the pipe 64 has an orifice 65 in the middle, and its upstream end opens to the side surface of the lower end of the second heat exchanger main body 40.

Next, the operation will be explained. Heated steam as a heating medium is supplied into the first heat exchanger main body 22 from a pipe 26, reaches the preheater 15 via a pipe 28, and is discharged to the outside from a drain pipe 29. On the other hand, deionized water is supplied as feed water from the piping 11 by a pressure pump (not shown). The deionized water is preliminarily heated by heating steam in the preheater 15 and then introduced into the first supply water chamber 21 . The deionized water is further heated by the heated steam as it passes through the heat exchanger tube 23 from the first supply water chamber 21, turns into steam at the upper end of the heat exchanger tube 23, and enters the first steam chamber 31. The water vapor from which some water droplets have been removed by the fins provided in the first steam chamber 31 is transferred to the pipe 34.
is introduced into the gas-liquid separator 35 from the gas-liquid separator 35.
After the droplets are removed within the heating medium inlet 42, they are introduced as a heating medium into the second heat exchanger body 40.

The liquid separated by the gas-liquid separator 35 is introduced into a level tank 36. In the level tank 36, deionized water is stored through piping 38 at a level corresponding to the level of deionized water in the first heat exchanger body 22. When the level of deionized water in the first heat exchanger body 22 becomes higher than the upper end of the heat transfer tube 23,
Level switch 39 operates to close solenoid valve 12 and automatically stop the supply of deionized water. This controls the level of deionized water within the first heat exchanger body 22 from becoming too high.

On the other hand, a portion of the deionized water introduced into the first water supply chamber 21 is also supplied to the second water supply chamber 33 through the piping 52. Normally, the solenoid valve 50 is closed and the second
The deionized water supplied into the supply water chamber 33 is heated by the water vapor introduced as a heating medium while rising inside the heat exchanger tube 41, becomes steam at the upper end of the heat exchanger tube 41, and flows into the second steam chamber. Enter within 44. The water vapor from which some water droplets have been removed by the fins provided in the second steam chamber 44 is introduced into the gas-liquid separator 45 to remove the droplets, and then introduced into the cooling device 61.

The liquid separated by the gas-liquid separator 45 is introduced into a level tank 46. In the level tank 46, deionized water is stored through piping 48 at a level corresponding to the level of deionized water in the second heat exchanger body 40. When the level of deionized water in the second heat exchanger body 40 becomes higher than the upper end of the heat transfer tube 41,
The level switch 49 operates to open the solenoid valve 50 and automatically drain the deionized water in the second supply water chamber 33 through the pipe 55. This also controls the level of deionized water in the second heat exchanger main body 40 so that it does not become too high.

The water vapor introduced into the cooling device 61 flows through the cooling pipe 6
2, it condenses and becomes distilled water, which accumulates at the lower end of the cooling device 61. The obtained distilled water is supplied from a pipe 63 to a manufacturing facility for pharmaceuticals and the like (not shown). Further, the water vapor that has been deprived of heat within the second heat exchanger main body 40 is also condensed to become distilled water, which is similarly supplied to equipment for manufacturing pharmaceuticals and the like via piping 64 and piping 63.

(Effect of the invention) A first supply water chamber 21 into which supply water as a heated medium is introduced is provided at the lower end, and a first heat exchanger main body 22 in which heated steam is used as a heating medium is provided above the first supply water chamber 21. is provided above the first heat exchanger main body 22.
A steam chamber 31 is provided, a second supply water chamber 33 is provided above the first steam chamber 31 with a partition wall 32 in between, a second heat exchanger main body 40 is provided above the second supply water chamber 33,
By providing the second steam chamber 44 above the second heat exchanger body 40 and communicating the first steam chamber 31 and the second heat exchanger body 40, the first steam chamber 3
Since the steam generated in step 1 is used as a heating medium for the second heat exchanger body 40; (a) the heat of the steam generated in the lower first heat exchanger body 22 is transferred to the upper second heat exchanger body 40; Since it can be used in the main body 40, the thermal efficiency is increased and the production cost of distilled water can be reduced. Moreover, the second heat exchanger body 22 is located above the first heat exchanger body 22.
Since the heat exchanger main body 40 is arranged, the installation space required is approximately the same as that of a conventional distilled water production apparatus using one heat exchanger.

(b) Since the second supply water chamber 33 is provided above the first steam chamber 31 with a partition wall in between, the configuration is simplified even though two heat exchangers are actually used. It is possible to reduce the manufacturing cost of the device.

(Another example) (a) The preheater 15 may be omitted.

(b) The gas-liquid separator 35 and the gas-liquid separator 45 may be omitted. However, in this case, although the apparatus is simplified, the purity of the distilled water obtained is reduced.

(c) As the heat exchanger 20, a configuration in which three or more stages of heat exchanger bodies are connected vertically can be adopted. In this case, there is an advantage that the structures of the steam chamber and the supply water chamber located in the middle are all simplified.

(d) By providing two or more heat exchangers 20, it is possible to obtain a distilled water production apparatus having a structure of four or more effect cans.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side layout diagram of a distilled water production apparatus according to the present invention. 21...first supply water chamber,
22... First heat exchanger main body, 31... First steam chamber, 32... Partition wall, 33... Second supply water chamber, 40
...Second heat exchanger main body, 44...Second steam chamber.

Claims (1)

[Scope of utility model registration request] A first supply water chamber into which supply water as a heated medium is introduced is provided at the lower end, and a first heat exchanger body using heated steam as a heating medium is provided above the first supply water chamber;
A first steam chamber is provided above the first heat exchanger main body, a second supply water chamber is provided above the first steam chamber across a partition, and a second heat exchanger main body is provided above the second supply water chamber. By providing a second steam chamber above the second heat exchanger body and communicating the first steam chamber with the second heat exchanger body, the steam generated in the first steam chamber is transferred to the second heat exchanger body. A distilled water production device characterized in that it is used as a heating medium for the vessel body.