Condensing device

Abstract

A condensing device, comprising: a first shell-side cylinder extending up and down, the lower end of the first shell-side cylinder being open to serve as a first shell-side outlet for outputting a shell-side medium; a heat exchange tube arranged in the first shell-side cylinder in the axial direction; a second shell-side cylinder extending up and down and at least being fitted over the periphery of the bottom of the first shell-side cylinder; and a condensation supercooling member arranged in the second shell-side cylinder and below the first shell-side cylinder, wherein the condensation supercooling member is provided with a condensation supercooling channel extending up and down; an upper port of the condensation supercooling channel is communicated with the first shell-side outlet; the outer peripheral wall of the condensation supercooling channel is opposite to the inner peripheral wall of the first shell-side cylinder at an interval to form a gap; and a non-condensable gas outlet is formed in the position, above the condensation supercooling member, of the second shell-side cylinder. Compared with the prior art, the present invention has a compact structure and can achieve functions of condensation, supercooling, gas-liquid separation, and liquid storage in a small space.

Description

A condensing device Technical Field

[0001] The invention belongs to the technical field of heat exchange, and in particular relates to a condensing device. Background Art

[0002] The supercooling of the medium to be condensed usually requires condensation and cooling in a condenser, and then input into a liquid storage tank for gas-liquid separation. The liquid after gas-liquid separation is stored in the liquid storage tank, and the non-condensable gas after gas-liquid separation is discharged. However, since the supercooling of the medium to be condensed usually requires secondary cooling, that is, at least two condensers are required to be designed in series, or the volume of the condenser is designed to be very large. In addition, the existing liquid storage tank is designed separately from the condenser. The liquid storage tank usually needs to consider a large gas-liquid separation space and a liquid storage space as well as various connecting pipes, resulting in a relatively large size of the liquid storage tank. Therefore, the condensing equipment composed of the existing condenser and liquid storage tank has a large overall footprint and a large investment, and the connecting pipes between the two condensers and the connecting pipes between the condenser and the liquid storage tank increase the pressure loss of the system.

[0003] Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a condensing device with a compact structure and capable of realizing condensation, supercooling, gas-liquid separation and liquid storage functions in a relatively small space in response to the current status of the existing technology.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a condensing device, comprising:

[0006] A first shell-side cylinder extending vertically has a shell-side inlet at its upper portion for inputting shell-side medium to be condensed, and a first shell-side outlet at its lower end for outputting shell-side medium;

[0007] The heat exchange tube is axially arranged in the first shell-side cylinder;

[0008] It is characterized by also including:

[0009] A second shell-side cylinder extending vertically, at least the upper portion of which is sleeved on the outer periphery of the bottom of the first shell-side cylinder;

[0010] a condensation subcooling element disposed within the second shell-side cylinder and below the first shell-side cylinder, the condensation subcooling element comprising a condensation subcooling channel extending vertically, the upper end of the condensation subcooling channel being in communication with the first shell-side outlet of the first shell-side cylinder; an outer peripheral wall of the condensation subcooling channel being opposed to an inner peripheral wall of the second shell-side cylinder to form a gap;

[0011] A non-condensable gas outlet is provided on the second shell-side cylinder at a position above the condensation subcooling member;

[0012] The space of the second shell-side cylinder below the condensation subcooling member serves as a liquid storage cavity communicated with the lower port of the condensation subcooling channel, and the liquid storage cavity is communicated with the non-condensable gas outlet through the above-mentioned gap.

[0013] Thus, the heat exchange tube design of the present invention can condense the shell-side medium to be condensed once. The shell-side medium after the primary condensation undergoes secondary condensation and gas-liquid separation in the condensation subcooling channel. The liquid after gas-liquid separation flows into the liquid storage chamber under the action of its own gravity, and the non-condensable gas is output from the non-condensable gas outlet through the spiral channel, thereby achieving condensation, gas-liquid separation, and liquid storage functions in a relatively small space. Moreover, the present invention integrates condensation, gas-liquid separation, and liquid storage into a single condensing device, eliminating the need for separate connecting pipes. At the same time, the condensing device of the present invention is installed vertically, which brings significant economic benefits in terms of investment, land occupation, and system operating costs.

[0014] To improve the condensation and gas-liquid separation effects, preferably, the condensation subcooling channel is arranged in a spiral from the inside to the outside, which can increase the contact area between the condensation subcooling channel and the shell-side medium, thereby improving the condensation and gas-liquid separation effects.

[0015] The condensation subcooling channel can be refrigerated after being powered on. Preferably, the condensation subcooling element comprises a central tube and a spiral plate. The central tube extends vertically, and the upper end of the central tube is connected to the lower end of the heat exchange tube, while the lower end of the central tube is closed. The spiral plate is arranged on the outer circumference of the central tube, and the spiral plate has two adjacent spiral channels that are wound clockwise or counterclockwise along the circumference. The first spiral channel serves as the condensation subcooling channel, and 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. The side wall of the second shell-side cylinder is provided with a first tube-side inlet pipe that is connected to the outer end of the second spiral channel away from the central tube. In this way, 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.

[0016] Preferably, there are at least two groups of heat exchange tubes, wherein the lower end tube openings of the first group of heat exchange tubes are connected to the upper end port of the central tube, and a second tube-side inlet pipe connected to the lower end tube openings of the second group of heat exchange tubes is provided on the side wall of the first shell-side cylinder, and the second tube-side inlet pipe is located above the condensing subcooling component. When there are three or more groups of heat exchange tubes, the lower end tube openings of the other groups of heat exchange tubes except the first group are respectively connected to the corresponding second tube-side inlet pipes on the side walls of the first shell-side cylinder, and the number of second tube-side inlet pipes corresponds to the number of groups of heat exchange tubes. In order to improve the effect of gas-liquid separation, further, the first spiral channel has a central portion relatively close to the central tube and a peripheral portion relatively far away from the central tube;

[0017] 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 part of the first spiral channel.

[0018] In this way, the liquid phase in the shell-side medium flows through the central part of the first spiral channel, and the gas phase can spiral outward to the peripheral part, then enter the gap and be discharged from the non-condensable gas outlet.

[0019] Preferably, the portion of the baffle relatively far from the non-condensable gas outlet extends outwardly to the inner peripheral wall of the second shell-side cylinder, so that the non-condensable gas can flow toward the non-condensable gas outlet in a concentrated manner.

[0020] Furthermore, the lower end of the first shell-side cylinder is in the shape of an inverted cone.

[0021] Furthermore, the side wall of the inverted cone is opposite to the non-condensable gas outlet, so as to promote the non-condensable gas to flow out faster.

[0022] In each of the above schemes, preferably, a second shell-side outlet is provided at the bottom of the second shell-side cylinder.

[0023] Preferably, a first liquid level gauge and a second liquid level gauge are provided on the side wall of the second shell side cylinder. The first liquid level gauge is provided corresponding to the central position in the up and down directions of the condensation subcooling channel, and the second liquid level gauge is located below the condensation subcooling channel and above the second shell side outlet.

[0024] Preferably, a pressure gauge port for detecting system pressure is provided on the side wall of the second shell-side cylinder, and the pressure gauge port is located above the non-condensable gas outlet.

[0025] Compared with the prior art, the advantages of the present invention are: by adding a second shell-side cylinder and a condensation subcooling element to the first shell-side cylinder and heat exchange tube, the heat exchange tube can condense the shell-side medium to be condensed once, and the shell-side medium after the first condensation is secondary condensed and gas-liquid separated in the condensation subcooling channel of the condensation subcooling element. The liquid after gas-liquid separation flows into the liquid storage chamber under the action of its own gravity, and the non-condensable gas is output from the non-condensable gas outlet, thereby achieving condensation, subcooling, gas-liquid separation and liquid storage functions in a relatively small space. In addition, the present invention integrates condensation, subcooling, gas-liquid separation and liquid storage into a single condensing device, eliminating the need for additional connecting pipes. At the same time, the condensing device of the present invention is installed vertically, which brings significant economic benefits in terms of investment, land occupation, system operating costs, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic structural diagram of a first embodiment of the present invention;

[0027] FIG2 is an enlarged view of the local structure of FIG1;

[0028] FIG3 is a schematic structural diagram of a second embodiment of the present invention;

[0029] FIG4 is a schematic structural diagram of the third embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0031] Example 1:

[0032] As shown in FIG1 and FIG2 , a preferred embodiment 1 of a condensing device of the present invention is shown. The condensing device includes a first shell-side cylinder 110 , a heat exchange tube 120 , a second shell-side cylinder 130 , and a condensation subcooling element 140 .

[0033] 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 a first shell-side outlet 112 at its lower end for outputting the shell-side medium. The lower end of the first shell-side cylinder 110 is in the shape of an inverted cone.

[0034] The heat exchange tube 120 is axially arranged inside the first shell-side cylinder 110;

[0035] The second shell-side cylinder 130 extends vertically, with at least its upper portion sleeved around the outer periphery of the bottom of the first shell-side cylinder 110. A non-condensable gas outlet 132 is provided on the sidewall of the second shell-side cylinder 130, corresponding to 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.

[0036] The condensation subcooling component 140 is arranged in the second shell-side cylinder 130, below the first shell-side cylinder 110, and above the liquid storage chamber 133. The condensation subcooling component 140 has a condensation subcooling channel 141 extending up and down. The upper end of the condensation subcooling channel 141 is connected to the first shell-side outlet 112 of the first shell-side cylinder 110; the lower end of the condensation subcooling channel 141 is connected to the liquid storage chamber 133; the outer peripheral wall of the condensation subcooling channel 141 is opposite to the inner peripheral wall of the second shell-side cylinder 130 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.

[0037] In this embodiment, the condensation subcooling member 140 has a central tube 142 and a spiral plate 143. The central tube 142 extends up and down, and the upper end of the central tube 142 is connected to the lower end of the heat exchange tube 120, and the lower end of the central tube 142 is closed; the spiral plate 143 is arranged on the outer periphery of the central tube 142, and the spiral plate 143 has two spiral channels that are wound clockwise or counterclockwise along the circumferential direction and spirally arranged from the inside to the outside, wherein the first spiral channel 1431 serves as the above-mentioned condensation subcooling channel 141, and the first spiral channel 1431 has a central portion relatively close to the central tube 142 and an outer portion relatively far away from the central tube 142; the upper end of the central portion of the first spiral channel 1431 is opposite to and connected to the lower end of the first shell-side cylinder 110, and the peripheral edge of the lower end of the first shell-side cylinder 110 extends horizontally outward to form a baffle 114 covering the upper end of the outer portion of the first spiral channel 1431. The portion of the baffle 114 relatively away from the non-condensable gas outlet 132 extends outwardly to the inner circumferential wall of the second shell-side cylinder 130 .

[0038] The upper and lower ports of the second spiral channel 1432 are closed, and the inner port of the second spiral channel 1432 close to the center tube 142 is connected to the center tube 142. A first tube-side inlet pipe 134 is provided on the side wall of the second shell-side cylinder 130, which is connected to the outer port of the second spiral channel 1432 away from the center tube 142.

[0039] That is, the tube-side medium enters the second spiral channel 1432 through the first tube-side inlet pipe 134, and spirally flows from outside to inside to the central tube 142, and then flows into the heat exchange tube 120. After exchanging heat with the shell-side medium in the first shell-side cylinder 110, it is output through the first tube-side outlet pipe 115 on the upper side wall of the first shell-side cylinder 110.

[0040] The shell-side medium is input into the first shell-side cylinder 110 through the shell-side inlet 111, then flows downward and enters the first spiral channel 1431. After heat exchange 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.

[0041] At the same time, a first liquid level gauge 136 and a second liquid level gauge 137 are provided on the sidewall of the second shell-side cylinder 130. The first liquid level gauge 136 is provided at the central position of the condensation subcooling channel 141 in the vertical direction, and the second liquid level gauge 137 is located below the condensation subcooling channel 141 and above the second shell-side outlet 135. These monitor the liquid level in the liquid storage chamber 133. The highest point of the liquid level in the liquid 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 liquid level gauge 136 and the second liquid level gauge 137, as shown by the double-dotted chain line in FIG1 , where the upper double-dotted chain line indicates the highest point of the liquid level, and the lower double-dotted chain line indicates the lowest point of the liquid level.

[0042] A pressure gauge port 138 for detecting system pressure is provided on the side wall of the second shell-side cylinder 130 , and the pressure gauge port is located above the non-condensable gas outlet 132 .

[0043] Example 2:

[0044] FIG3 shows a second preferred embodiment of a condensing apparatus according to the present invention. This embodiment is substantially the same as the first embodiment, differing in that it comprises two groups of heat exchange tubes 120. The lower ends of the first group of heat exchange tubes communicate with the upper end of a central tube 142. A second tube-side inlet pipe 113 is provided on the lower sidewall of the first shell-side cylinder 110, communicating with the lower ends of the second group of heat exchange tubes. This second tube-side inlet pipe 113 is located above the condensing subcooling element 140. Furthermore, in addition to a first tube-side outlet pipe 115 communicating with the upper ends of the first group of heat exchange tubes, a second tube-side outlet pipe 116 is also provided on the upper sidewall of the first shell-side cylinder 110, connecting with the upper ends of the second group of heat exchange tubes. Providing multiple groups of heat exchange tubes facilitates heat exchange between multiple media and the shell-side medium to be condensed.

[0045] It is conceivable that when the heat exchange tubes 120 are divided into three or four groups or more, the number of the second tube-side inlet pipes 113 and the number of the second tube-side outlet pipes 116 will also increase accordingly.

[0046] Example 3:

[0047] As shown in FIG4 , a third preferred embodiment of a condensing device according to the present invention is substantially identical to the first embodiment, except that the lower ends of the heat exchange tubes 120 are directly connected to the pipes 117 at the bottom of the first shell-side cylinder 110. If the heat exchange tubes 120 are also divided into two groups, there are two pipes 117. Correspondingly, the upper sidewall of the first shell-side cylinder 110 is also provided with a first tube-side outlet pipe 115 and a second tube-side outlet pipe 116. Furthermore, the condensation subcooling element 140 comprises only a condensation subcooling channel 141 extending vertically. The shell-side medium within the first shell-side cylinder 110 passes through the condensation subcooling channel 141 and undergoes gas-liquid separation.

[0048] In the present specification and claims, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Because the embodiments disclosed herein can be arranged in various orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A condensing device, comprising: A first shell-side cylinder (110) extending vertically has a shell-side inlet (111) at its upper portion for inputting shell-side medium to be condensed, and a first shell-side outlet (112) opened at its lower end for outputting shell-side medium; A heat exchange tube (120) is axially arranged inside the first shell-side cylinder (110); Features Also included are: A second shell-side cylinder (130) extending vertically, at least the upper portion of which is sleeved on the outer circumference of the bottom of the first shell-side cylinder (110); A condensation subcooling element (140) is arranged inside the second shell-side cylinder (130) and below the first shell-side cylinder (110); the condensation subcooling element (140) has a condensation subcooling channel (141) extending up and down, and the upper end of the condensation 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 condensation subcooling channel (141) is spaced from the inner peripheral wall of the second shell-side cylinder (130) to form a gap (131); A non-condensable gas outlet (132) is provided on the second shell-side cylinder (130) at a position above the condensation subcooling element (140); The space of the second shell-side cylinder (130) located below the condensation subcooling component (140) serves as a liquid storage chamber (133) connected to the lower port of the condensation subcooling channel (141), and the liquid storage chamber (133) is connected to the non-condensable gas outlet (132) through the above-mentioned gap (131).

2. The condensing device according to claim 1, characterized in that: The condensation subcooling channel (141) is arranged in a spiral from inside to outside.

3. The condensing device according to claim 1, characterized in that: The condensation subcooling element (140) comprises a central tube (142) and a spiral plate (143); the central tube (142) extends up and down, and the upper end of the central tube (142) is connected to the lower end of the heat exchange tube (120), and the lower end of the central tube (142) is closed; the spiral plate (143) is arranged on the outer periphery of the central tube (142), and the spiral plate (143) has two spiral channels that are rolled clockwise or counterclockwise along the circumferential direction to form two adjacent spiral channels, wherein: The first spiral channel (1431) serves as the above-mentioned 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) close to the central tube (142) is connected to the central tube (142), and the side wall of the second shell-side cylinder (130) is provided with a first tube-side inlet connecting pipe (134) connected to the outer port of the second spiral channel (1432) away from the central tube (142).

4. The condensing device according to claim 3, characterized in that: There are at least two groups of heat exchange tubes (120), wherein the lower end of the first group of heat exchange tubes is connected to the upper end of the central tube (142), and a second tube side inlet pipe (113) connected to the lower end of the second group of heat exchange tubes is provided on the side wall of the first shell side cylinder (110), and the second tube side inlet pipe (113) is located above the condensation subcooling component (140).

5. The condensing device according to claim 3, characterized in that: 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 part of the first spiral channel (1431).

6. The condensing device according to claim 5, characterized in that: The portion of the baffle (114) relatively far from the non-condensable gas outlet (132) extends outward to the inner peripheral wall of the second shell-side cylinder (130).

7. The condensing device according to claim 5, characterized in that: The lower end of the first shell-side cylinder (110) is in the shape of an inverted cone.

8. The condensing device according to claim 7, characterized in that: The side wall of the inverted cone is opposite to the non-condensable gas outlet (132).

9. The condensing device according to any one of claims 1 to 8, characterized in that: A second shell-side outlet (135) is provided at the bottom of the second shell-side cylinder (130).

10. The condensing device according to claim 9, characterized in that: The side wall of the second shell-side cylinder (130) is provided with a first liquid level gauge (136) and a second liquid level gauge (137). The first liquid level gauge (136) is arranged at the central position in the up-down direction of the condensation subcooling channel (141), and the second liquid level gauge (137) is located below the condensation subcooling channel (141) and above the second shell-side outlet (135).

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