JPS602889A - Heat exchanging device - Google Patents

Abstract

PURPOSE:To heat simultaneously more than two kinds of fluid to be heated by one heating fluid provided in a simple structure by a method wherein a condensing pipe group is provided correspond to a branching pipe line arranged on a pipe line which connects an evaporating pipe group and a condensing pipe group. CONSTITUTION:An evaporating pipe group 5 is arranged in a duct 1 through which a heating fluid is flowed. A heat to be transferred to the evaporating pipe group 5 is transferred by the vapor of a medium to upper headers 8 of a condensing pipe group 9 located in a duct 2 in which fluid to be heated is flowed through pipe lines 7 from upper headers 6 of the evaporating pipe group 5. After the condensing of the vapor, the vapor is flowed into lower headers 4 of the evaporating pipe group through pipe lines 11 from lower headers 10. The evaporating and condensing are performed with natural circulating of the medium. When the heat of high temperature gas G1 flowed through a duct 1 is transferred to two fluids G2 and G3 with such a separated type heat pipe, pipe lines 71 branched from the pipe lines 7 and pipe lines 111 branched from the pipe lines 11 are provided to heat the fluid G3 flowed through the duct 3. Thus, six assemblies of condensing pipe group can be connected to three assemblies of evaporating pipe group, accordingly, two kinds of fluid G2 and G3 are heated simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a separate heat vibrator heat exchange device.

In a heat exchange device, when two or more fluids to be heated (low-temperature fluids) are heated by one heating fluid (high-temperature fluid), various measures are taken depending on the type of heat exchanger. Among these, in the case of a regeneration type, multi-tube type, or plate type heat exchanger, the heating fluid is divided into a corresponding number of fluids depending on the number of fluids to be heated, and heat exchange is performed respectively. It was necessary to install a heat exchanger to heat each fluid to be heated inside.

In this regard, the inventors have previously proposed a separate type heat pipe, which is a heat exchange device in which an evaporating tube section and a condensing tube section are separated and placed in a heating fluid and a heated fluid, respectively.

Figure 1 shows the structure of the separate heat pipe.
Reference numeral 5 denotes a group of evaporation tubes arranged in the duct l through which the heating fluid (gas, etc.) flows, and the transferred heat is transferred to the fluid (gas, etc.) which receives heat from the ladder 6 through the pipe line 7 at the top of the duct 1 through the vapor of the medium. It is conveyed to the upper header 8 of the condensing tube bank 9 located in the flowing duct z. This vapor condenses and flows from the lower header 10 into the ladder 4 through the pipe line 11 to the lower part of the evaporator tube group.

Since the lower ladder 10 is located at a higher level than the lower ladder 4, evaporation and condensation occur through natural circulation of the medium.

The pipe line 7 is provided with a female valve 17 and a valve 16 for removing non-condensable gas.

FIG. 2 is a drawing schematically showing this structure.

Figure 3A shows a duct using such a separate heat pipe], which transfers the heat of the high-temperature gas (e.g., combustion gas from a furnace) G1 flowing therethrough to two fluids G2 (e.g., combustion air) and G3 (e.g., fuel gas). FIG. In this case, six safety valves are required in the illustrated example, and six gas vent valves are also required.

In addition to this, the serial arrangement has the disadvantage that the difference in outlet temperature between the high-drifting fluid and each low-humidity fluid becomes extremely small as shown in Figure 3B, so it is necessary to reduce the amount of heat exchanged in the upstream heat exchange. .

FIG. 4 shows an embodiment of the present invention, in which a pipe line 71 branching from pipe line 7 and a pipe line 111 branching from pipe line 11 in FIG. G
3 is heated.

In the illustrated example, six condensing tube groups are connected to three evaporation tube groups, and two types of fluid G2. G.

can be heated. With this structure, only three safety valves and three gas vent valves are required, which means that the number of valves required in the case of Fig. 3 is sufficient.

FIG. 5A shows a second embodiment of the present invention, in which a pipe line 12 branching off from a pipe line 1-1 for returning the condensate to the lower header 4 of the evaporator tube group is connected to a third fluid G. It is connected to the lower header 13 of the condensing tube group 14 located in the flowing duct 3. The steam and non-condensable gas in the pipe line 1 condenses only the flow medium (working fluid) in the condensing pipe group 14, and the non-condensable gas is extracted from the valve 16 (Fig. 5) as necessary to prevent a decrease in the heat transfer effect. be able to.

Further, when the configuration as shown in FIG. 5A is used, that is, when a composite type is used, the temperature gradient and the product shown in FIG. 5C can be made small.

FIG. 6 is a diagram showing a third embodiment of the present invention. In this case, it is the same as in Fig. 5A in that a pipe (number 1, number 12 in Fig. 54) is provided that branches off from the pipe that returns the condensate to the lower header of the evaporator tube group, but the non-condensable gas is The condensing tube group 14 except for the condensing tube group 9 is located in the same duct 2 together with the condensing tube group 9. Similarly, the condensing tube group 109 and the condensing tube group 1 work 4 excluding non-condensable gas are connected to the duct 3 through which the third fluid flows.
It is located inside.

The explanation above has been given by taking as an example the case where the third fluid is heated in the separate type heat pipe, but when heating a plurality of fluids such as the 4-2, 5-5, etc., the above-mentioned FIGS. The means can be implemented by providing branch lines.

By carrying out this invention, it is possible to simultaneously heat the diffused fluid using the heat possessed by the fluid of the heating source. Moreover, the number of valves used does not increase in proportion to the number of fluids to be heated, and can be reduced in number, resulting in various effects.

[Brief explanation of the drawing]

Fig. 1 is a drawing showing the structure of a separate type heat pipe, Fig. 2 is a drawing schematically showing Fig. 1, and Fig. 3A is a drawing showing the structure of a separate type heat pipe.
2. A drawing showing the arrangement of separate heat pipes in the case of heating G3 at the same time, Fig. 3B is a temperature gradient diagram in that case, Fig. 4 is a drawing showing the arrangement and piping of the first embodiment of the present invention, Fig. 5A 5B is a drawing of the surface scissors shown in FIG. 5A, FIG. 5C is a temperature gradient diagram, and FIG. 6 is a drawing showing the third embodiment. 5...Evaporation tube group 7...Pipe line 9 connecting the upper headers of the evaporation tube group and the condensation tube group...Condensation tube group 11...Evaporation tube group Pipe line G1 connecting the lower headers of the condensing pipe group . . . Heating fluid G2. G3...Fluid to be heated Fig. 1 I et al. Fig. 4 Fig. 5B

Claims (1)

[Claims] 1. In a heat exchanger using a separate type heat vibrator, a pipe line branching from a pipe line connecting an evaporating tube group and a condensing tube group is provided to simultaneously heat two or more fluids. 1. A heat exchange device characterized in that one or more condensing tube groups are provided corresponding to branch pipes. 26 A pipe line connecting the upper header of the evaporating tube group and the upper header of the condensing tube group and a pipe line connecting the lower header of the evaporating tube group and the lower header of the condensing tube group are provided with branching pipe lines, respectively. 2. The heat exchange device according to claim 1, wherein the heat exchange device is connected to an upper header and a lower header of one or more other condensing tube groups corresponding to the branch pipe line. 3. One or more condensing tube groups having non-condensable gas separation means are connected to a conduit branching from the conduit connecting the lower headers of the evaporation tube group - and the condensing tube group - A heat exchange device according to claim 1. 4. Connect another condensing tube group having non-condensable gas separation means to a conduit branching from the conduit connecting the lower header of the condensing tube group and the lower header of the evaporating tube group, and connect these two condensing tube groups to the condensing tube group - 2. The heat exchange device according to claim 1, further comprising one or more condensing tube groups housed in a duct through which heated fluid flows.