JPH0788924B2 - Condensing evaporator - Google Patents

Description

The present invention relates to a condenser evaporator.

[Conventional technology]

FIG. 11 shows a conventional condensing evaporator used in a double rectifying column for air separation. The condensing evaporator 1 is a liquid oxygen LO in a bottom space 4 of an upper tower 3 partitioned by a partition wall 2. It is immersed in.

This condensing evaporator 1 is partitioned by a large number of vertical parallel partition plates, and two chambers of an oxygen chamber and a nitrogen chamber are alternately stacked adjacent to each other. The oxygen chambers are the upper and lower ends of the condensing evaporator 1. And is filled with liquid oxygen LO flowing down from above the upper tower 3.

The nitrogen chamber and the liquid oxygen LO are airtightly separated, and the nitrogen gas GN introduced into the nitrogen chamber from the top of the lower tower 5 through the connecting pipe 6 exchanges heat with the liquid oxygen LO in the adjacent chamber. At the same time as evaporating LO, the nitrogen gas GN is condensed and liquefied into liquid nitrogen.
It becomes LN, flows down to the bottom of the condensation evaporator 1, reaches the liquid reservoir 8 of the lower tower 5 through the connecting pipe 7, is led out from the pipe 9, and partly becomes the reflux liquid L of the lower tower 5.

The vaporized oxygen gas GO is led out of the tower through the pipe 10 as a part of the product, and the other gases become the rising gas of the upper tower 3.

Most of the power of this air separation device is consumed by compressing the raw material air to increase the pressure of the lower tower 5, and the lower the pressure of the lower tower 5, the lower the power cost. As for the pressure of the lower tower 5, saturated nitrogen gas GN is condensed and vaporized 1
The condensation temperature of the nitrogen gas GN must be lowered in order to lower the operating pressure of the lower tower 5.
In order to lower the condensation temperature, it is necessary to lower the temperature of liquid oxygen LO.

[Problems to be solved by the invention]

However, since the above-mentioned condensing evaporator is immersed in liquid oxygen, the temperature difference (about 1 ° C /
m) occurs, the temperature of the lower part of the condensation evaporator is higher than that of the upper part, and the temperature difference from the nitrogen condensation temperature is reduced accordingly.

The temperature difference between the nitrogen side and the oxygen side of the condenser evaporator is usually 1-2 ° C.
Therefore, the temperature rise of the liquid oxygen has become a serious problem in the performance of the condensation evaporator. That is, in order to operate the lower tower at 5 kgf / cm ² G, the condenser evaporator height cannot be exhibited unless the condenser evaporator height is set to about 2 m.
If the condenser evaporator height is increased in order to increase the heat transfer area to increase the capacity, the liquid oxygen depth must be increased to further increase the lower column operating pressure.

Further, there is a large space between the condensation evaporator and the bottom of the upper column where the condensation evaporator is installed, and the capacity of the condensation evaporator cannot be fully exhibited unless liquid oxygen is stored in this space.

Therefore, until the condensing evaporator is immersed in liquid oxygen, neither the condensate that becomes the lower column reflux liquid nor the gas rising in the upper column due to the evaporation of liquid oxygen is generated, so that the rectification action is not started. That is, the time required for liquid oxygen to immerse the condenser evaporator is a wasteful waiting time (starting time) before the start of rectification.
During this period, the power cost of the raw air compressor is lost.

An object of the present invention is to provide a condensing evaporator capable of efficiently exchanging heat by reducing the liquid pressure due to the liquid depth of the liquid medium on the evaporation side to prevent the liquid temperature from rising.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention forms a first fluid passage and a second fluid passage alternately by a large number of vertical partition plates, In a condenser-evaporator that performs heat exchange between a liquid medium and a fluid in the second fluid passage, heat transfer plates are arranged in multiple stages in the first fluid passage, and upper and lower stages are alternately arranged at one end of the heat transfer plate. It is characterized in that a liquid receiving port is provided to form a reversal flow channel, and a liquid medium is caused to flow down into the reversal flow channel.

[Work]

Since the liquid medium is made to flow down into the reversal flow path, the liquid temperature does not rise due to the liquid depth, and a sufficient heat transfer area can be obtained by the reversal flow path to improve the efficiency of the condensation evaporator.

〔Example〕

Hereinafter, the present invention will be described with reference to FIGS. 1 to 10 by taking an example in which an evaporating liquid medium is oxygen and a condensing fluid is nitrogen.

FIG. 1 is an overall perspective view of a condensation evaporator according to the present invention, in which the internal structures of an oxygen chamber which is a first fluid passage and a nitrogen chamber which is a second fluid passage are partially cut away. 2 is a cross-sectional view of the oxygen chamber, FIG. 3 is a cross-sectional view of the nitrogen chamber, and FIG. 4 is a perspective view showing the main part of the heat transfer plate of the oxygen chamber. The direction is indicated by a dashed arrow.

The condenser evaporator 20 is provided with a large number of vertically parallel partition plates 22 joined at both sides by side bars 21 to alternately provide an oxygen chamber (first fluid passage) 23 and a nitrogen chamber (second fluid passage) 24. It is formed by stacking a number of layers, and liquid oxygen is fed into the oxygen chamber 23 from above.
The LO flows down to exchange heat with the nitrogen gas GN flowing in the nitrogen chamber 24, and a liquid storage box 25 is arranged at the upper part.

The oxygen chamber 23 is formed by the partition plate 22, the side bars 21 on both sides of the partition plate 22, and the side bars 26, 27 arranged at the upper and lower ends,
The heat transfer plates 28 are arranged horizontally in a vertical multi-stage in the inside thereof, the upper side bar 26 is provided with an inlet 29 communicating with the liquid storage box 25, and the lower side bar 27 is provided. Is provided with an outlet 30.

The heat transfer plate 28 is one in which the bent lines 31 of the corrugated heat transfer fins are arranged vertically with the horizontal direction thereof.The horizontal planes 32 serve as liquid medium flow paths 33, and one end of the horizontal planes 32 is alternately extended vertically. Then, the whole or a part of the extended portion is bent obliquely upward to form a reversing plate 34 to form a liquid receiving port 35, and the flow path 33 is reversed in the flow direction in each vertical stage. Further, the space between the upper and lower reversal plates 34 is configured as a gas discharge path 36 for the oxygen gas GO, and the vertical surface 37 is joined to the partition plate 22 by brazing or the like.

The liquid oxygen LO guided to the liquid storage box 25 through the introduction pipe 38 and flowing from the inflow port 29 into the oxygen chamber 23 flows through the horizontal flow path 33 formed by the heat transfer plate 28, and the heat transfer plate 28 and the partition. Board 22
Through which heat is exchanged with the nitrogen gas GN flowing in the adjacent nitrogen chamber 24, and a part of it is evaporated to form oxygen gas GO bubbles.

The bubbles of the oxygen gas GO flow in the same direction by the flow of the liquid oxygen LO, and then are separated from the liquid oxygen LO at the end of the heat transfer plate 28, and rise upward in the gas discharge passage 36 obliquely to the gas collecting passage 39. Leading to
Gas outlet 40
Exits the condenser evaporator 20 through.

The liquid oxygen LO reverses its flow direction by the reversing plate 34 of the liquid receiving port 35 and sequentially flows to the lower flow path 33 while exchanging heat, and excess liquid oxygen LO that does not evaporate flows out from the outlet 30.

In this way, the flow direction of the liquid is reversed in each upper and lower stage, and the liquid flow is multistage in the horizontal direction, so it does not flow down rapidly due to gravity as in the case of flowing in the vertical direction, and the heat transfer area is reduced. It can be used to the maximum, and the efficiency of the condenser evaporator 20 is improved.

Further, since the pressure of the flowing liquid oxygen LO is released to the gas side of the oxygen chamber 23 at the end of the flow path 33 of each heat transfer plate 28, the liquid temperature does not rise due to the liquid pressure of the conventional liquid depth.

Furthermore, since the gas discharge passage 36 of the oxygen gas GO is formed at the end of each flow passage 33 by the reversal plate 34, the vaporized bubbles of the oxygen gas GO can be quickly separated from the liquid oxygen LO and floated. Does not interfere with the flow of liquid oxygen LO.

In the gas collecting path 39 shown on the left side of FIG.
In order to prevent excess liquid oxygen LO overflowing from flowing down with almost no heat exchange, a perforated plate 41 is arranged so that heat can be exchanged even when liquid oxygen LO flows through the gas collecting passage 39. I have set up. The perforated plate 41 may be arranged on both the left and right gas collecting paths 39.

The inflow amount of the liquid oxygen LO into the condenser evaporator 20 is adjusted by adjusting the liquid depth in the liquid reservoir box 25 by the mounting height of the weir 42 provided in the liquid reservoir box 25, or by setting the opening cross-sectional area of the inflow port 29. The excess liquid oxygen LO flowing into the condenser / evaporator 20 from the inflow port 29 of the liquid storage box 25 overflows from the weir 42 of the liquid storage box 25.

On the other hand, the nitrogen chamber 24, which is airtightly partitioned from the oxygen chamber 23, has substantially the same configuration as the conventional device, and includes the partition plate 22, the side bars 21 on both sides of the partition plate 22, and the upper and lower end portions of the partition plate 22. And sidebars 43 and 44, and an inlet header 45 and an inlet pipe 46 for introducing the nitrogen gas GN are provided on the upper side surface. Further, an outlet header 47 and an outlet pipe 48 for collecting condensed liquid nitrogen LN are provided on the lower side surface.

The nitrogen gas GN distributed from the inlet header 45 to each nitrogen chamber 24 through the notch 49 of the sidebar 21 is uniformly distributed by the distribution plate 50 to the heat transfer plate 51 arranged vertically in the nitrogen chamber,
It flows down while condensing and liquefying by exchanging heat with the liquid oxygen LO in the adjacent oxygen chamber 23, and then gathers from the lower distribution plate 52 through the notch 53 of the side bar 21 to the outlet header 47.

The distribution plates 50 and 52 of the headers 45 and 47 have a structure in which the nitrogen gas GN is uniformly distributed into the nitrogen chamber 24 and the condensed liquid nitrogen LN is uniformly collected.

Further, the non-condensable gas such as helium gas contained in the nitrogen gas GN is led out from the pipe 54 attached to the outlet header 47. The pipe 54 is not necessarily attached only to the outlet header 47, but may be attached to the inlet header 45, or may be attached to both the inlet and outlet headers 45, 47.

A perforated plate is generally used as the distribution plates 50, 52 and the heat transfer plate 51, but the distribution plate is not limited to this. An outlet header 47 may be provided at the center of the lower part of the evaporator 20.

Here, heat exchange between the oxygen chamber 23 and the nitrogen chamber 24 is performed by the liquid oxygen LO.
Is carried out through the horizontal surface 32 and the vertical surface 37 of the heat transfer plate 28 which are in contact with each other and the partition plate 22, but as described above, when the liquid oxygen LO is sequentially flown from the upper part toward the lower part while being allowed to flow down. , The flow rate flowing through the flow path 33 decreases toward the lower stage. Therefore, when the oxygen chamber 23 is composed of the heat transfer plates 28 having the same pitch at the upper and lower sides, the liquid height on the flow path 33 at the lower stage is reduced, and the upper part is separated into the gas phase and the lower part is separated into the liquid phase. Heat transfer plate
The contact area between the vertical surface 37 of 28 and the partition plate 22 is reduced only by the gas phase portion, and the effective heat transfer contact area of the liquid phase is reduced.

Therefore, the pitch of the heat transfer plate 28 is not the same, and the pitch of the heat transfer plate 28 on the lower side is made finer than the pitch on the upper side, and
The heat transfer plate 28 can be configured so that 33 is filled with the liquid. In addition to the method of making the pitch fine to prevent the reduction of the effective heat transfer contact area, as shown in FIG.
Slits 55 serving as outlets on both edges in the width direction of the horizontal plane 32 of 28
It is also possible to increase the heat exchange heat transfer area by providing a part of the liquid oxygen LO flowing through the flow path 33 from the slit 55 to the vertical surface 37 of the heat transfer plate 28 and the partition plate 22 in a film shape. .

In addition to slits, various shapes of openings such as narrow rectangular openings and circular openings can be used for the same purpose, but only the liquid flows down from these openings, and the openings are formed so that evaporated gas does not rise. Set the area. Further, if the above-mentioned openings are provided too much, the heat transfer area from the partition plate 22 decreases and the amount of heat transfer on the horizontal surface of the heat transfer plate decreases, which has the opposite effect, so it is necessary to provide an appropriate number at certain intervals.

FIG. 6 shows an example in which an intermediate inlet 56 for liquid oxygen LO is provided on the side surface of the condenser evaporator 20 in the vertical direction, and an inlet pipe 57 is provided.
The liquid oxygen LO guided through the liquid reservoir box 58 on the side surface flows into the heat transfer plate 28 inside from the inflow port 59 provided in the side bar 21. Further, the side bar 21 at this portion is provided with an exhaust port 60 for leading the evaporated gas, and the evaporated oxygen gas GO after heat exchange is discharged. Excess liquid oxygen in the liquid storage box 58 flows down from the weir 61.

By installing an appropriate number of such intermediate inlets 56 at the top and bottom,
Heat exchange can be effectively performed by supplementing the amount of liquid oxygen LO flowing down.

FIG. 7 shows an example in which the condensation evaporator 20 is installed in a double-column rectification column. The condensation evaporator 20 is installed in the bottom space 71 of the upper tower 70, and the oxygen chamber 23 is installed in the upper tower 70. It is open to the space.

The upper tower 70 and the lower tower 72 are partitioned by a partition plate 73, the top of the lower tower 72 and the nitrogen chamber 24 of the condenser / evaporator 20 are connected by an inlet pipe 46, and the nitrogen gas GN is the nitrogen of the condenser / evaporator 20. It is introduced into the chamber 24 through the inlet header 45. The nitrogen gas GN exchanges heat with the liquid oxygen LO in the oxygen chamber 23 to condense and liquefy, flows down through the nitrogen chamber 24, passes through the pipe 48 from the lower part of the condensation evaporator 20, and passes through the liquid pool in the lower tower 72.
It reaches 74 and becomes the reflux liquid LN of the lower tower 72, and a part is led out from the pipe 75 as product liquid nitrogen LN. Further, the non-condensable gas in the nitrogen chamber 24 is led out from the pipe 54.

On the other hand, the liquid oxygen LO that has flowed from the lowermost stage of the upper tower 70 through the introduction pipe 38 into the liquid storage box 25 above the condenser / evaporator 20 moves laterally in the oxygen chamber 23 of the condenser / evaporator 20 as described above. While flowing in a reverse flow to the left and right, it exchanges heat with the nitrogen gas GN in the nitrogen chamber 24 to evaporate and become oxygen gas GO, which flows out from the gas outlet 40 and becomes ascending gas in the upper tower 70, while partly producing product oxygen gas. Collected as GO from pipe 76. Excess liquid oxygen that does not evaporate
LO flows out from the outflow port 30, accumulates on the partition plate 73, and is led out from the pipe 77.

A part of the derived liquid oxygen LO becomes a product, and the other part is lifted by a liquid oxygen pump or a thermosiphon reboiler, and is circulated to the liquid storage box 25 again from the upper pipe 78.

In addition, the liquid oxygen LO is completely evaporated in the oxygen chamber 23,
Excess liquid oxygen LO to prevent the deposition of aticelen at 33
It is preferable to wash the flow channel 33 with liquid oxygen LO at all times by measuring the flow rate of liquid oxygen LO to measure the liquid level of liquid oxygen LO accumulated on the partition plate 73 in order to know that excess liquid oxygen LO is flowing down. Or, install a flow meter in the pipe 77.

FIG. 8 is a cross-sectional view showing an example in which the oxygen chamber has a closed structure, and the oxygen chamber 80 has an outlet 81 for oxygen gas GO and liquid oxygen.
It has a pressure resistant structure in which the LO inlet 82 and the outlet 83 are sealed, and the internal structure is the same as that of the oxygen chamber 23 in FIG.

The liquid oxygen LO inflow port 82 of the oxygen chamber 80 communicates with an upper liquid reservoir header 85 having a space 84 for storing the liquid oxygen LO,
The header 85 has an inlet pipe for introducing liquid oxygen LO.
86 and a pipe 87 for leading out the oxygen gas GO evaporated in the header 85 are provided.

The oxygen gas outlet 81 is provided with a gas outlet header 88,
Collects the oxygen gas GO that evaporates and flows out from the oxygen chamber 80,
Derived from the pipe 89.

The outlet 83 of the liquid oxygen LO of the oxygen chamber 80 communicates with a lower liquid reservoir header 91 having a space 90 for storing the liquid oxygen LO,
The header 91 is provided with a pipe 92 for leading the liquid oxygen LO. This lower reservoir header 91 is
It is also possible to provide each of the liquid outlets 83 at the bottom.

Further, as in FIG. 2, a perforated plate 41 may be attached to the gas collecting passage 39, and the pitch of the heat transfer plate 28 and the like may be the oxygen chamber 23 described above.
Is the same as.

Even if the oxygen chambers have a closed structure, the structure of the adjacent nitrogen chambers may be the same as that shown in FIG.

FIG. 9 is an installation example of a condenser evaporator having the oxygen chamber 80 having the above-mentioned closed structure.

The condensing evaporator 100 is installed at the upper part of the lower tower 101, the top of the lower tower 101 and the nitrogen chamber of the condensing evaporator 100 are connected by a pipe 102, and nitrogen gas GN is supplied from the header 103 of the condensing evaporator 100 to nitrogen. Introduce to the room.

Nitrogen gas GN is condensed and liquefied in the nitrogen chamber, and flows from the header 104 at the bottom of the condensation evaporator 100 through the pipe 105 to the liquid reservoir 1 of the lower tower 101.
It reaches 06 and is led out from the pipe 107. Further, the non-condensed gas is led out from the pipe 108 in order to prevent the non-condensed gas from accumulating in the room and reducing the condensing ability.

The liquid oxygen LO generated in the upper tower flows into the upper liquid reservoir header 85 from the pipe 86 and accumulates in the header 85. The header
Adjust the inflow with a liquid level gauge (not shown) so that the liquid depth in 85 is constant.

The liquid oxygen LO in the header 85 is introduced into the condenser-evaporator 100 and flows in the oxygen chamber 80 by laterally inverting and flowing left and right, while exchanging heat with the nitrogen gas GN in the nitrogen chamber. The part evaporates and becomes oxygen gas GO. The remaining non-evaporated liquid oxygen LO is accumulated in the lower liquid reservoir header 91, is led out from the pipe 92, and is partly circulated to the upper liquid reservoir header 85. At this time, instead of the pipe 86, a pipe for introducing the circulating liquid may be separately provided in the upper liquid reservoir header 85.

As described in the description of FIG. 7, a liquid level gauge and a flow meter (not shown) are provided to measure the excess liquid oxygen.

The oxygen gas GO evaporated in the oxygen chamber 80 is gathered at the gas outlet header 88 provided at the upper part of the condenser evaporator 100, and from the pipe 89,
Further, the oxygen gas spontaneously evaporated in the liquid reservoir header 85 is led out together with the pipe 87 through the pipe 109, a part thereof is collected as a product, and the other is returned to the bottom portion of the upper tower to be the rising gas of the upper tower. The pipe 86 and the pipe 87 may be connected as shown in the drawing, or may be separate pipes.

FIG. 10 is a sectional view showing another embodiment of the oxygen chamber.

The oxygen chamber 110 is provided with a side bar 112 at one end of the heat transfer plate 111.
The inversion channel 113 is formed by alternately contacting or joining the inner surface of the upper and lower layers, and the evaporated oxygen gas GO is led out from the gas outlet 114 provided for each channel 113. .

The gas outlet 114 is formed by notching or punching the side bars 112 arranged on the left and right sides of the oxygen chamber 110.

Further, in this embodiment, since the flow path 113 of the heat transfer plate 111 has a downward slope in the liquid flow direction, the flow path 11
The oxygen gas GO evaporated in 3 floats in the flow path and reaches the lower surface of the upper heat transfer plate 111. The lower surface of this upper flow path is
Since there is an upward gradient in the liquid flow direction, the bubbles can flow in the same direction as the liquid without backflowing, and can be quickly discharged from the gas outlet 114 without hindering the liquid flow.

As the heat transfer plate of the oxygen chamber 110, the heat transfer plate having the horizontal flow path described above may be used.

Further, the heat transfer plate with the gradient can be used as the heat transfer plate of the oxygen chamber shown in each of the above-mentioned embodiments.

In each of the above embodiments, the heat transfer plates in the oxygen chamber are arranged in a line, but when the flow resistance of the flow path is large and the flow of the liquid is obstructed, the flow path length is shortened to reduce the flow resistance. For this purpose, the heat transfer plate may be divided in the length direction and arranged in a plurality of rows in parallel.

Since the condensation evaporator of the present invention allows liquid oxygen to flow down without being accumulated, there is no increase in liquid temperature due to liquid pressure, the condensation temperature of nitrogen gas can be lowered, and the operating pressure of the lower column can be reduced, and the raw air compressor Reduce power costs.

Furthermore, since liquid oxygen flows in from the upper part of the condensation evaporator and condensation and evaporation occur at the same time, the time required to immerse the condensation evaporator in liquid oxygen as in the conventional case, that is, the start-up time is greatly shortened. The power cost of can be reduced.

In the installation examples of FIGS. 7 and 9, the condensing evaporator is installed independently, but as is well known, a nitrogen gas rising pipe is provided at the center of the lower tower top, and a concentric circle is formed around this rising pipe. The condensing evaporator of the present invention can be used even in the case where a plurality of condensing evaporators are arranged in the above to form a condensing evaporator having a large throughput.

Although the evaporation and the condensation by the heat exchange between the liquid oxygen and the nitrogen gas in the air liquefaction separation have been described above, the same operation and effect can be obtained also with other liquid media and fluids.

〔The invention's effect〕

In a condenser-evaporator for exchanging heat between a liquid medium in a first fluid passage and a fluid in a second fluid passage, heat transfer plates are arranged in multistages in the first fluid passage, and upper and lower stages are arranged at one end of the heat transfer plate. Since the liquid receiving ports are alternately provided to form the reversing flow path and the liquid medium is made to flow down into the reversing flow path, the temperature of the liquid medium does not rise due to the liquid pressure, and the reversing flow path provides a sufficient heat transfer area. As a result, the efficiency of the condensing evaporator is improved, the condensing temperature of the fluid on the second fluid passage side is lowered, and the operating pressure is reduced, whereby the power cost can be reduced. Furthermore, since it is not necessary to immerse the liquid medium, the starting time can be shortened.

[Brief description of drawings]

1 to 10 show an embodiment of the present invention.
The figure is a perspective view showing a partial cutaway of the condensing evaporator, FIG. 2 is a sectional view of an oxygen chamber which is a first fluid passage, FIG. 3 is a sectional view of a nitrogen chamber which is a second fluid passage, and FIG. Is a perspective view showing a main part of the heat transfer plate, FIG. 5 is a perspective view showing another embodiment of the heat transfer plate,
FIG. 6 is a sectional view showing a second embodiment of the oxygen chamber, FIG. 7 is a sectional view showing an installation example of a condensation evaporator, FIG. 8 is a sectional view showing another embodiment of the condensation evaporator, and FIG. 8 is a sectional view showing an example of installation of the condensation evaporator shown in FIG. 8, FIG. 10 is a sectional view showing a third embodiment of the first fluid passage, and FIG. 11 is an example of installation of a conventional condensation evaporator. FIG. 20 …… Condensation evaporator, 21 …… Side bar, 22 …… Partition plate,
23 …… Oxygen chamber (first fluid passage), 24 …… Nitrogen chamber (second fluid passage), 25 …… Liquid storage box, 26,27 …… Upper and lower sidebars, 2
8 ... Heat transfer plate, 33 ... Flow path, 35 ... Liquid receiving port, LO ... Liquid oxygen, GO ... Oxygen gas, LN ... Liquid nitrogen, GN ... Nitrogen gas

Claims (20)

[Claims] 1. A plurality of vertical partition plates alternately form first fluid passages and second fluid passages, and heat exchange is performed between a liquid medium in the first fluid passages and a fluid in the second fluid passages. In the condensing evaporator to be performed, heat transfer plates are arranged in the upper and lower multi-stages in the first fluid passage, and liquid receiving ports are alternately provided at one end of the heat transfer plate to form a reversing flow path, and the reversing flow is formed. Condensation evaporator characterized in that a liquid medium is made to flow down the passage. 2. The condensing evaporator according to claim 1, wherein the first fluid passage is an oxygen chamber. 3. The condenser evaporator according to claim 1, wherein the second fluid passage is a nitrogen chamber. 4. The condensing evaporator according to claim 1, wherein the first fluid passage is formed by a partition plate and side bars joining both end portions of the partition plate. 5. The first fluid passage is formed by a partition plate, a side bar joining both side end portions of the partition plate, and a side bar joining upper and lower end portions of the partition plate. The condensation evaporator according to claim 1. 6. The first fluid passage is provided with a header for inflowing a liquid medium, a header for outflowing a liquid medium, and a header for exhausting evaporative gas, according to claim 1. Condensation evaporator. 7. The side bars on both sides of the partition plate have openings formed at upper and lower ends, respectively, and an upper opening serves as an outlet for evaporative gas, and a lower opening serves as an outlet for an unevaporated liquid medium. The condensing evaporator according to claim 4 or 5. 8. The upper and lower side bars each have openings formed on both sides thereof, and the upper opening serves as an outlet for evaporative gas and the lower opening serves as an outlet for liquid medium. Condensation evaporator according to claim 5. 9. The upper sidebar has an opening formed at an intermediate portion in the lengthwise direction, and the opening serves as an inlet for the liquid medium. Condensation evaporator. 10. The condensation evaporator according to claim 4, wherein the lower side bar has an opening formed at an end thereof, and the opening serves as an outlet for the liquid medium. . 11. The condenser evaporator according to claim 1, wherein the heat transfer plate is formed by fold lines of the corrugated heat transfer fins arranged in a horizontal direction. 12. The condensing evaporator according to claim 1, wherein the heat transfer plate has a downward slope formed in the liquid flow direction. 13. The condensing evaporator according to claim 1, wherein the heat transfer plate has a downflow opening formed at an edge portion in the width direction. 14. A heat transfer plate, wherein one ends thereof are alternately joined to the side bars, and evaporative gas outlets are formed in the side bars. Alternatively, the condenser evaporator according to item 5. 15. The condensing evaporator according to claim 1, wherein the liquid receiving port is formed by extending a heat transfer plate. 16. The condensing evaporator according to claim 15, wherein the liquid receiving port is formed by bending an extending portion of the heat transfer plate upward. 17. The heat transfer plate is formed to be shorter than the width of the partition plate, and a gas passage is formed in a space between the tip end side and the side bar.
Item 5. A condensation evaporator according to Item 5 or Item 5. 18. The condenser-evaporator according to claim 17, wherein a perforated fin is provided in the gas flow path. 19. The condenser-evaporator according to claim 1, wherein the liquid medium flows down from a liquid medium reservoir provided in the upper part of the first fluid passage. 20. The condenser-evaporator according to claim 1, wherein the liquid medium flows down from a liquid medium reservoir provided on an upper portion and a side surface of the first fluid passage.