A condensing apparatus

Abstract

A condensation device includes: a first shell-side cylinder extending vertically, with its lower end open as a first shell-side outlet for supplying shell-side medium; heat exchange tubes axially disposed within the first shell-side cylinder; a second shell-side cylinder extending vertically, at least fitted around the outer periphery of the bottom of the first shell-side cylinder; a condensation subcooling element disposed within the second shell-side cylinder, below the first shell-side cylinder, the condensation subcooling element having a vertically extending condensation subcooling channel, the upper end of the condensation subcooling channel communicating with the first shell-side outlet; a gap formed between the outer peripheral wall of the condensation subcooling channel and the inner peripheral wall of the first shell-side cylinder; a non-condensable gas outlet located above the condensation subcooling element on the second shell-side cylinder; and a space within the second shell-side cylinder below the condensation subcooling element serving as a liquid storage chamber communicating with the lower end of the condensation subcooling channel. Compared with the prior art, this invention has a compact structure and can achieve condensation, subcooling, gas-liquid separation, and liquid storage functions in a smaller space.

Description

Technical Field

[0001] This invention belongs to the field of heat exchange technology, and specifically relates to a condensation device. Background Technology

[0002] The subcooling of the medium to be condensed typically requires condensation and cooling within a condenser, followed by gas-liquid separation in a storage tank. The separated liquid is stored in the storage tank, while the non-condensable gases are discharged. However, since subcooling of the medium usually requires two-stage cooling, at least two condensers in series are needed, or the condensers themselves must be very large. Furthermore, existing storage tanks are designed separately from the condensers, and these tanks typically require significant space for gas-liquid separation, liquid storage, and various piping, resulting in substantial size. Therefore, existing condensation systems combining condensers and storage tanks have a large footprint and require significant investment. Additionally, the connecting pipes between the two condensers and between the condenser and the storage tank increase system pressure loss. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a condensation device with a compact structure that can realize condensation, subcooling, gas-liquid separation and liquid storage functions in a small space, in light of the current state of the prior art.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a condensation device, comprising:

[0005] The first shell-side cylinder extends vertically, with a shell-side inlet at the top for inputting the shell-side medium to be condensed, and an open bottom end serving as the first shell-side outlet for outputting the shell-side medium.

[0006] The heat exchange tubes are arranged axially within the first shell-side cylinder.

[0007] Its characteristic is that it also includes:

[0008] The second shell-side cylinder extends vertically, with at least its upper part fitted around the outer periphery of the bottom of the first shell-side cylinder;

[0009] A condenser subcooling element is disposed inside the second shell-side cylinder and below the first shell-side cylinder. The condenser subcooling element has a vertically extending condenser subcooling channel. The upper end of the condenser subcooling channel is connected to the first shell-side outlet of the first shell-side cylinder. The outer peripheral wall of the condenser subcooling channel and the inner peripheral wall of the second shell-side cylinder are spaced apart to form a gap.

[0010] The second shell-side cylinder has a non-condensable gas outlet located above the condenser subcooler.

[0011] The space below the condenser subcooler in the second shell-side cylinder serves as a liquid storage chamber connected to the lower port of the condenser subcooler channel. The liquid storage chamber is connected to the non-condensable gas outlet through the aforementioned gap.

[0012] Thus, the heat exchange tube design in this invention enables primary condensation of the shell-side medium to be condensed. After primary condensation, the shell-side medium undergoes secondary condensation and gas-liquid separation within the condensation subcooling channel. The separated liquid flows into the storage chamber under its own gravity, while non-condensable gases are output from the non-condensable gas outlet through a spiral channel. This allows for condensation, gas-liquid separation, and liquid storage functions to be achieved in a relatively small space. Furthermore, this invention integrates condensation, gas-liquid separation, and liquid storage into a single condensation unit, eliminating the need for separate connecting pipes. Simultaneously, the vertical installation of this condensation unit brings significant economic benefits in terms of investment, land area, and system operating costs.

[0013] To improve condensation and gas-liquid separation efficiency, the condensation subcooling channel is preferably arranged spirally from the inside to the outside. This increases the contact area between the condensation subcooling channel and the shell-side medium, thereby improving condensation and gas-liquid separation efficiency.

[0014] The aforementioned condensing subcooling channel can be energized for cooling. Preferably, the condensing subcooling component has a central tube and a spiral plate. The central tube extends vertically, with its upper end connected to the lower end of the heat exchange tube, and its lower end closed. The spiral plate is located on the outer periphery of the central tube and has two spiral plates wound clockwise or counterclockwise to form two adjacent spiral channels. The first spiral channel serves as the aforementioned condensing subcooling channel, while the upper and lower ends of the second spiral channel are closed, and the inner end of the second spiral channel near the central tube is connected to the central tube. A first tube-side inlet pipe is provided on the side wall of the second shell-side cylinder, connected to the outer end of the second spiral channel away from the central tube. Thus, the tube-side medium for condensation first enters the second spiral channel to condense the shell-side medium in the first spiral channel, and then enters the heat exchange tube to condense the shell-side medium in the first shell-side cylinder, thereby achieving condensation and subcooling of the shell-side medium.

[0015] Preferably, there are at least two sets of heat exchange tubes, wherein the lower end of the first set of heat exchange tubes is connected to the upper end of the central tube, and a second tube-side inlet pipe is provided on the side wall of the first shell-side cylinder, which is connected to the lower end of the second set of heat exchange tubes. This second tube-side inlet pipe is located above the condenser subcooler. When there are three or more sets of heat exchange tubes, the lower end of each set of heat exchange tubes other than the first set is connected to the corresponding second tube-side inlet pipe on the side wall of the first shell-side cylinder, and the number of second tube-side inlet pipes corresponds to the number of sets of heat exchange tubes. To improve the gas-liquid separation effect, the first spiral channel further has a central portion relatively close to the central tube and a peripheral portion relatively far from the central tube.

[0016] The lower port of the first shell-side cylinder is opposite to and connected to the upper port of the central part of the first spiral channel, and the periphery of the lower port of the first shell-side cylinder extends horizontally outward to form a baffle covering the upper port of the outer periphery of the first spiral channel.

[0017] In this way, the liquid phase in the shell-side medium flows through the central part of the first spiral channel, while the gas phase spirals outward to the outer part, then enters the gap and is discharged from the non-condensable gas outlet.

[0018] Preferably, the portion of the baffle that is relatively far from the non-condensable gas outlet extends outward to the inner peripheral wall of the second shell-side cylinder. This allows the non-condensable gas to flow in a concentrated manner towards the non-condensable gas outlet.

[0019] Furthermore, the lower end of the first shell-side cylinder is an inverted cone.

[0020] Furthermore, the sidewall of the inverted cone is opposite to the non-condensable gas outlet. This promotes the accelerated outflow of non-condensable gas.

[0021] In the above embodiments, preferably, the bottom of the second shell side cylinder is provided with a second shell side outlet.

[0022] Preferably, the side wall of the second shell-side body is provided with a first level gauge and a second level gauge. The first level gauge is located at the center of the condensation subcooling channel in the vertical direction, and the second level gauge is located below the condensation subcooling channel and above the outlet of the second shell-side body.

[0023] Preferably, the side wall of the second shell-side cylinder is provided with a pressure gauge port for detecting system pressure, and the pressure gauge port is located above the non-condensable gas outlet.

[0024] Compared with existing technologies, the advantages of this invention are as follows: By adding a second shell-side shell and a condenser subcooler to the first shell-side shell and heat exchange tubes, the heat exchange tubes can perform primary condensation of the shell-side medium to be condensed. The shell-side medium after primary condensation undergoes secondary condensation and gas-liquid separation in the condenser subcooler channel. The liquid after gas-liquid separation flows into the liquid storage chamber under its own gravity, while non-condensable gases are output from the non-condensable gas outlet. Thus, condensation, subcooling, gas-liquid separation, and liquid storage functions can be achieved in a relatively small space. Furthermore, this invention integrates condensation, subcooling, gas-liquid separation, and liquid storage into a single condensation unit, eliminating the need for separate connecting pipes. Simultaneously, the vertical installation of the condensation unit of this invention brings significant economic benefits in terms of investment, land area, and system operating costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0026] Figure 2 for Figure 1 A magnified view of the local structure;

[0027] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of Embodiment 3 of the present invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1:

[0031] like Figure 1 , 2 As shown, this is a preferred embodiment of a condensing device of the present invention. The condensing device includes a first shell-side cylinder 110, a heat exchange tube 120, a second shell-side cylinder 130, and a condensing subcooling element 140.

[0032] The first shell-side cylinder 110 extends vertically, with a shell-side inlet 111 at its upper end for inputting the shell-side medium to be condensed, and an open lower end serving as a first shell-side outlet 112 for outputting the shell-side medium. The lower end of the first shell-side cylinder 110 is shaped like an inverted cone.

[0033] The aforementioned heat exchange tube 120 is axially disposed within the first shell-side cylinder 110;

[0034] The second shell-side cylinder 130 extends vertically and at least its upper part is fitted around the outer periphery of the bottom of the first shell-side cylinder 110. A non-condensable gas outlet 132 is provided on the side wall of the second shell-side cylinder 130 at the position of the inverted cone at the lower end of the first shell-side cylinder 110. The space below the second shell-side cylinder 130 serves as a liquid storage chamber 133. A second shell-side outlet 135 is provided at the bottom of the second shell-side cylinder 130.

[0035] The condenser subcooler 140 is located inside the second shell-side cylinder 130, below the first shell-side cylinder 110, and above the liquid storage chamber 133. The condenser subcooler 140 has vertically extending condenser subcooling channels 141. The upper port of the condenser subcooling channel 141 is connected to the first shell-side outlet 112 of the first shell-side cylinder 110. The lower port of the condenser subcooling channel 141 is connected to the liquid storage chamber 133. The outer peripheral wall of the condenser subcooling channel 141 and the inner peripheral wall of the second shell-side cylinder 130 are spaced apart to form a gap 131, so that the liquid storage chamber 133 is connected to the non-condensable gas outlet 132 through the gap 131.

[0036] In this embodiment, the condenser subcooling element 140 has a central tube 142 and a spiral plate 143. The central tube 142 extends vertically, and its upper port is connected to the lower end of the heat exchange tube 120, while its lower port is closed. The spiral plate 143 is disposed on the outer periphery of the central tube 142, and the spiral plate 143 has two spiral channels that are wound clockwise or counterclockwise in the circumferential direction and are arranged in two adjacent spiral channels from the inside to the outside. The first spiral channel 1431 serves as the aforementioned condenser subcooling channel 141, and the first spiral channel 1431 has a central portion relatively close to the central tube 142 and a peripheral portion relatively far from the central tube 142. The upper port of the central portion of the first spiral channel 1431 is opposite to and connected to the lower port of the first shell-side cylinder 110, and the periphery of the lower port of the first shell-side cylinder 110 extends horizontally outward to form a baffle 114 covering the upper port of the peripheral portion of the first spiral channel 1431. The baffle 114 extends outward from the non-condensable gas outlet 132 to the inner peripheral wall of the second shell-side cylinder 130.

[0037] The upper and lower ports of the second spiral channel 1432 are closed, and the inner port of the second spiral channel 1432 near the central tube 142 is connected to the central tube 142. The side wall of the second shell cylinder 130 is provided with a first tube inlet pipe 134 that is connected to the outer port of the second spiral channel 1432 away from the central tube 142.

[0038] That is, the tube-side medium enters the second spiral channel 1432 through the first tube-side inlet pipe 134, and flows spirally from the outside to the inside to the central tube 142, and then flows into the heat exchange tube 120, where it exchanges heat with the shell-side medium in the first shell-side cylinder 110 before being output.

[0039] The shell-side medium is fed into the first shell-side cylinder 110 through the shell-side inlet 111, then flows downward and enters the first spiral channel 1431. After exchanging heat with the tube-side medium in the second spiral channel 1432, the liquid phase is stored in the liquid storage chamber 133, and the gas phase flows upward and is discharged from the non-condensable gas outlet 132.

[0040] Meanwhile, the side wall of the second shell-side cylinder 130 is equipped with a first level gauge 136 and a second level gauge 137. The first level gauge 136 is positioned at the center of the condensation subcooling channel 141 in the vertical direction, and the second level gauge 137 is located below the condensation subcooling channel 141 and above the second shell-side outlet 135. This is to monitor the liquid level in the storage chamber 133, ensuring that the highest point of the liquid level in the storage chamber 133 does not exceed 10% of the width of the spiral plate 143 in the vertical direction, and the lowest point of the liquid level is located between the first level gauge 136 and the second level gauge 137. Specifically, as shown... Figure 1 As shown in the image, the double-dotted line on the upper side indicates the highest liquid level, and the double-dotted line on the lower side indicates the lowest liquid level.

[0041] The second shell 130 has a pressure gauge port 138 for detecting system pressure on its side wall, which is located above the non-condensable gas outlet 132.

[0042] Example 2:

[0043] like Figure 3 As shown, this is a preferred embodiment of the condensing device of the present invention. This embodiment is basically the same as the first embodiment, except that there are two sets of heat exchange tubes 120 in this embodiment. The lower end of the first set of heat exchange tubes is connected to the upper end of the central tube 142. The side wall of the first shell body 110 is provided with a second tube inlet pipe 113 that is connected to the lower end of the second set of heat exchange tubes. The second tube inlet pipe 113 is located above the condensing subcooling element 140.

[0044] Example 3:

[0045] like Figure 4 The image shows a preferred embodiment three of the condensation device of the present invention. This embodiment is basically the same as embodiment one, except that in this embodiment, the lower end of the heat exchange tube 120 is directly connected to the connecting pipe at the lower part of the first shell-side cylinder 110. Furthermore, the condenser subcooling element 140 only has vertically extending condenser subcooling channels 141. The shell-side medium in the first shell-side cylinder 110 undergoes gas-liquid separation after passing through the condenser subcooling channels 141.

[0046] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A condensation device, comprising: The first shell-side cylinder (110) extends vertically, with a shell-side inlet (111) at the upper part for inputting the shell-side medium to be condensed, and an open lower end serving as a first shell-side outlet (112) for outputting the shell-side medium. The heat exchange tube (120) is arranged axially inside the first shell-side cylinder (110); Its features It also includes: The second shell-side cylinder (130) extends vertically and is at least fitted on the outer periphery of the bottom of the first shell-side cylinder (110); A condenser subcooling element (140) is disposed inside the second shell-side cylinder (130) and below the first shell-side cylinder (110). The condenser subcooling element (140) has a vertically extending condenser subcooling channel (141). The upper port of the condenser subcooling channel (141) is connected to the first shell-side outlet (112) of the first shell-side cylinder (110). The outer peripheral wall of the condenser subcooling channel (141) and the inner peripheral wall of the second shell-side cylinder (130) are spaced apart and form a gap (131). The second shell-side cylinder (130) is provided with a non-condensable gas outlet (132) located above the condenser subcooler (140); The space below the condenser subcooler (140) in the second shell-side cylinder (130) serves as a liquid storage chamber (133) connected to the lower port of the condenser subcooler channel (141). The liquid storage chamber (133) is connected to the non-condensable gas outlet (132) through the aforementioned gap (131). The condensation subcooling channel (141) is spirally arranged from the inside to the outside; The condenser subcooling element (140) has a central tube (142) and a spiral plate (143). The central tube (142) extends vertically, and its upper end is connected to the lower end of the heat exchange tube (120), while its lower end is closed. The spiral plate (143) is located on the outer periphery of the central tube (142), and it has two spiral channels that are wound clockwise or counterclockwise along the circumference to form two adjacent spiral channels. The first spiral channel (1431) serves as the aforementioned condensation subcooling channel (141). The upper and lower ports of the second spiral channel (1432) are closed, and the inner port of the second spiral channel (1432) near the central tube (142) is connected to the central tube (142). The side wall of the second shell-side cylinder (130) is provided with a first tube-side inlet pipe (134) that is connected to the outer port of the second spiral channel (1432) away from the central tube (142). The heat exchange tubes (120) are at least two sets, wherein the lower end of the first set of heat exchange tubes is connected to the upper end of the central tube (142), and the side wall of the first shell-side cylinder (110) is provided with a second tube-side inlet pipe (113) that is connected to the lower end of the second set of heat exchange tubes. The second tube-side inlet pipe (113) is located above the condenser subcooler (140). The first spiral channel (1431) has a central portion relatively close to the central tube (142) and a peripheral portion relatively far from the central tube (142); The lower port of the first shell-side cylinder (110) is opposite to and connected to the upper port of the central part of the first spiral channel (1431), and the periphery of the lower port of the first shell-side cylinder (110) extends horizontally outward to form a baffle (114) covering the upper port of the outer periphery of the first spiral channel (1431).

2. The condensation device according to claim 1, characterized in that: The baffle (114) extends outward from the non-condensable gas outlet (132) to the inner peripheral wall of the second shell-side cylinder (130).

3. The condensation device according to claim 1, characterized in that: The lower end of the first shell-side cylinder (110) is an inverted cone.

4. The condensation device according to claim 3, characterized in that: The sidewall of the inverted cone is opposite to the non-condensable gas outlet (132).

5. The condensing device according to any one of claims 1 to 4, characterized in that: The bottom of the second shell-side cylinder (130) is provided with a second shell-side outlet (135).

6. The condensation device according to claim 5, characterized in that: The second shell-side cylinder (130) is provided with a first level gauge (136) and a second level gauge (137) on its side wall. The first level gauge (136) is located at the center of the condensation subcooling channel (141) in the vertical direction. The second level gauge (137) is located below the condensation subcooling channel (141) and above the second shell-side outlet (135).

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