Condenser

Abstract

The utility model provides a condenser which comprises a shell and a heat exchange tube arranged in the shell, and a plug piece is arranged in the heat exchange tube. The plug piece comprises a hoop part and a beard part, and the beard part is fixedly connected to one side of the hoop part. The condenser can eliminate heat transfer deterioration caused by a liquid film on the pipe wall of the heat exchange pipe, the efficiency of the heat exchanger is improved, and the temperature of obtained condensate is low.

Description

Technical Field

[0001] The utility model belongs to the field of heat exchange equipment, and specifically relates to a condenser. Background Art

[0002] Fine chemical production is often accompanied by solvent recovery processes. The commonly used condenser is a shell-and-tube heat exchanger. Since some solvents are corrosive, the heat exchanger needs to use materials such as 316L, 2205, titanium, and nickel-based alloys. However, such materials are expensive. In order to save investment, the design method of using the solvent medium in the tube side and the refrigerant in the shell side is generally adopted, and the equipment shell is made of ordinary carbon steel.

[0003] The internal smoothness of the tubes of the shell-and-tube condenser is relatively high, and the condensate forms a thin liquid film inside the tube, forming a heat exchange dead zone, which leads to deterioration of heat transfer, greatly affecting the condensation effect, and even making production impossible.

[0004] Therefore, how to solve the influence of the thin liquid film on the inner wall of the heat exchange tube on the heat exchange effect has become an important issue in improving the performance of the condenser. Utility Model Content

[0005] In order to solve the technical problems existing in the prior art, the utility model provides a condenser, which can eliminate the heat transfer deterioration caused by the liquid film on the wall of the heat exchange tube, improve the efficiency of the heat exchanger, and obtain a lower condensate temperature.

[0006] In order to achieve the above technical effects, the utility model adopts the following technical solutions:

[0007] The utility model provides a condenser, which comprises a shell and a heat exchange tube arranged inside the shell, wherein a plug is arranged inside the heat exchange tube;

[0008] The plug comprises a hoop portion and a whisker portion, wherein the whisker portion is fixedly connected to one side of the hoop portion.

[0009] As a preferred technical solution of the utility model, the outer diameter of the hoop is not larger than the inner diameter of the heat exchange tube.

[0010] As a preferred technical solution of the utility model, the plug also includes a hanging piece and a rib portion;

[0011] The rib part is fixedly connected to one side of the hanging piece;

[0012] The hoop portion is fixedly connected to the rib portion.

[0013] As a preferred technical solution of the utility model, the condenser includes an upper head and a lower head, and the upper head and the lower head are independently connected to the shell through flanges.

[0014] As a preferred technical solution of the present utility model, a cooling device is provided in the lower head.

[0015] As a preferred technical solution of the utility model, the cooling device includes a cooling component and a connecting component, and adjacent cooling components are connected via the connecting component.

[0016] As a preferred technical solution of the present utility model, the cooling device also includes an overflow component, and the overflow component is arranged below the connecting component.

[0017] As a preferred technical solution of the present utility model, the cooling device includes a cooling medium inlet and a cooling medium outlet.

[0018] As a preferred technical solution of the present utility model, the position of the cooling medium outlet is higher than the cooling medium inlet.

[0019] As a preferred technical solution of the utility model, the lower head is provided with a non-condensable gas outlet.

[0020] Compared with the prior art, the utility model has at least the following beneficial effects:

[0021] The utility model provides a condenser, which, by arranging plugs inside heat exchange tubes, destroys liquid film laminar flow, eliminates heat transfer deterioration caused by liquid film on the tube wall of the heat exchange tube, improves heat exchanger efficiency, and obtains a lower condensate temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a condenser provided in an embodiment of the present application;

[0023] Figure 2 A schematic diagram of the structure of a plug for a condenser provided in an embodiment of the present application;

[0024] Figure 3 A cross-sectional view of a cooling device for a condenser provided in an embodiment of the present application;

[0025] In the figure: 1-shell, 2-upper head, 3-lower head, 4-flange, 5-baffle, 6-cooling plate, 7-overflow weir, 8-connecting pipe, 9-heat exchange tube, 10-plug, 11-hanging plate, 12-rib, 13-hoop, 14-whisker, a-gas inlet, b-non-condensable gas outlet, c-condensate outlet, d-condensing medium inlet, e-condensing medium outlet, f-cooling medium inlet, g-cooling medium outlet.

[0026] The utility model is further described in detail below. However, the following examples are only simple examples of the utility model and do not represent or limit the scope of protection of the utility model. The scope of protection of the utility model shall be subject to the claims. DETAILED DESCRIPTION

[0027] The technical solution of the utility model is further described below through specific implementation methods.

[0028] The specific implementation of the utility model provides a condenser, which includes a shell, and a heat exchange tube arranged inside the shell, and a plug is arranged inside the heat exchange tube;

[0029] The plug comprises a hoop portion and a whisker portion, wherein the whisker portion is fixedly connected to one side of the hoop portion.

[0030] In the utility model, the plug is arranged inside the heat exchange tube. When the solvent condenses in the upper section of the heat exchange tube and flows downward along the inner wall of the tube, it encounters the hoop of the plug, and the laminar flow of the liquid film is destroyed. Under the action of gravity, the liquid film leaves the inner wall of the heat exchange tube, gathers on the beard of the plug, and flows down from the center of the heat exchange tube. Below the hoop, the gas can further exchange heat and condense. The flow mode of gas and liquid inside the heat exchange tube is optimized from laminar flow to turbulent flow, and the heat exchange efficiency is improved.

[0031] In a specific implementation of the utility model, in the condenser, the number of plugs in each heat exchange tube can be specifically selected according to the length, material and heat exchange requirements of the heat exchange tube, and is not further limited herein.

[0032] In a specific embodiment of the utility model, the plug also includes a hanging piece and a rib, the hanging piece is used to fix the plug to prevent the plug from being displaced inside the heat exchange tube. The rib is used to fix the hoop, and each plug may include a plurality of ribs and hoop, the number of which may be selected according to parameters such as the length, inner diameter and material of the heat exchange tube, and is not further limited here.

[0033] In a specific implementation of the utility model, the hanging piece and the hoop are made of thin sheet metal of the same material as the heat exchange tube, and the ribs and whiskers are made of metal wire of the same material as the heat exchange tube.

[0034] In a specific implementation manner of the utility model, the outer diameter of the hoop is not larger than the inner diameter of the heat exchange tube, so as to ensure that the hoop fits closely with the inner diameter of the heat exchange tube.

[0035] In a specific embodiment of the utility model, the shell is further provided with a baffle, and the size, material and position of the baffle in the shell can be specifically selected according to the condensation requirements and are not further limited here.

[0036] In a specific implementation manner of the utility model, the condenser comprises an upper head and a lower head, and the upper head and the lower head are independently connected to the shell through flanges.

[0037] In a specific implementation manner of the utility model, a cooling device is arranged in the lower head.

[0038] In the utility model, since the condensate leaves the heat exchange tube in advance under the action of the plug, which may cause the condensate temperature to be higher, a cooling device can be arranged in the lower head of the condenser to further cool the condensate.

[0039] In a specific embodiment of the utility model, after the condensate flows out of the condenser, it drips onto the cooling component for heat exchange, and falls step by step through the overflow component to obtain a condensate with a lower temperature.

[0040] In a specific embodiment of the present invention, the cooling component is preferably a cooling plate, which is a hollow structure. The cooling medium enters the cooling component from the first cooling medium inlet, flows through each cooling plate step by step, and then flows out of the cooling component from the first cooling medium.

[0041] In a specific implementation of the present invention, the number of cooling plates and the material of the cooling medium can be specifically selected according to the cooling requirements of the condensate, and no further limitation is made herein.

[0042] In a specific implementation manner of the present invention, the overflow component is preferably an overflow weir.

[0043] In a specific embodiment of the present invention, the connecting component is preferably a connecting pipe.

[0044] In a specific implementation of the utility model, when the temperature of the condensate flowing out of the heat exchange tube can meet the temperature requirement, the cooling component may not be provided.

[0045] In a specific embodiment of the present invention, the condenser is preferably a shell-and-tube condenser, and a plurality of heat exchange tubes are arranged in parallel in the shell. The number of heat exchange tubes can be specifically selected according to the condensation requirements and is not further limited herein.

[0046] In a specific embodiment of the utility model, the upper head is provided with a gas inlet, the side wall of the lower head is provided with a non-condensable gas outlet, and the bottom of the lower head is provided with a coolant outlet; the side wall of the shell is provided with a condensing medium inlet and a condensing medium outlet, the condensing medium inlet is provided on the side close to the lower head, and the condensing medium outlet is placed on the side close to the upper head to ensure that the condensing medium is in countercurrent contact with the gas to be cooled.

[0047] In a specific implementation manner of the present invention, the specific materials of the condensing medium and the cooling medium can be specifically selected according to the condensation requirements, and no further limitation is made herein.

[0048] In a specific implementation of the utility model, an operation mode of the condenser is as follows:

[0049] The gas to be condensed enters the condenser from the gas inlet, flows through the upper head and enters the condenser tube. The solvent condenses in the upper section of the heat exchange tube. When it flows downward along the inner wall of the tube, it encounters the hoop of the plug, and the laminar flow of the liquid film is destroyed. Under the action of gravity, the liquid film leaves the inner wall of the heat exchange tube, gathers on the beard of the plug, and flows down from the center of the heat exchange tube. Below the hoop, the gas further exchanges heat and condenses.

[0050] The condensing medium enters the shell from the condensing medium inlet, and is evenly distributed inside the shell by the baffles, countercurrently condenses the material to be condensed inside the heat exchange tube, and flows out of the shell from the condensing medium outlet;

[0051] After the condensate flows out of the heat exchange tube, it drips onto the heat exchange plate of the heat exchange device inside the lower head, and flows through the heat exchange plate step by step through the overflow weir, and flows out from the condensate outlet at the bottom of the lower head after cooling;

[0052] The cooling medium enters the cooling plate from the cooling medium inlet, flows through the heat exchange plates step by step, and then flows out of the cooling device from the cooling medium outlet;

[0053] After the non-condensable gas flows out of the heat exchange tube, it moves out of the condenser through the non-condensable gas outlet.

[0054] In order to better illustrate the present invention and facilitate understanding of the technical solution of the present invention, typical but non-limiting embodiments of the present invention are as follows:

[0055] Example 1

[0056] This embodiment provides a condenser, which includes a shell, a heat exchange tube inside the shell, and a plug is provided inside the heat exchange tube;

[0057] The plug includes a hanging piece, a rib part, a hoop part and a whisker part, wherein the rib part is fixedly connected to one side of the hanging piece, the hoop part is fixedly connected to the rib part, and the whisker part is fixedly connected to one side of the hoop part;

[0058] The condenser comprises an upper head and a lower head, and the upper head and the lower head are independently connected to the shell through flanges;

[0059] The upper head is provided with a gas inlet, the side wall of the lower head is provided with a non-condensable gas outlet, and the bottom of the lower head is provided with a coolant outlet; the side wall of the shell is provided with a condensing medium inlet and a condensing medium outlet, the condensing medium inlet is provided on the side close to the lower head, and the condensing medium outlet is placed on the side close to the upper head to ensure that the condensing medium is in countercurrent contact with the gas to be cooled.

[0060] Example 2

[0061] This embodiment provides a condenser, wherein a cooling device is arranged in the lower head of the condenser, the cooling device comprises a cooling assembly and a connecting assembly, adjacent cooling assemblies of various levels are connected through the connecting assembly, an overflow assembly is arranged below the connecting assembly, the cooling device comprises a cooling medium inlet and a cooling medium outlet; the lower head is provided with a non-condensable gas outlet;

[0062] The other structures of the condenser are the same as those in Example 1.

[0063] Example 3

[0064] This embodiment provides a condenser, the structure of which is as follows: Figure 1As shown, the condenser comprises a shell 1, an upper head 2 and a lower head 3, and the upper head 2 and the lower head 3 are independently connected to the shell through flanges 4;

[0065] A gas inlet a is provided at the top of the upper head;

[0066] A heat exchange tube 9 is arranged inside the shell 1, and the two ends of the heat exchange tube 9 are independently connected to the upper head 2 and the lower head 3 through the flange 4; a baffle 5 is also arranged inside the shell, and one end of the baffle 5 is connected to the side wall of the shell 1; a condensing medium inlet d and a condensing medium outlet e are arranged on the side wall of the shell 1, and the condensing medium inlet d is arranged on the side close to the lower head 3, and the condensing medium outlet e is arranged on the side close to the upper head 2.

[0067] A plug 10 is provided inside the heat exchange tube 9. The structure of the plug 10 is as follows: Figure 2 As shown, the plug 10 includes a hanging piece 11, a rib 12, a hoop 13 and a whisker 14, the rib 12 is fixedly connected to one side of the hanging piece 11, the hoop 13 is fixedly connected to the rib 12, the whisker 14 is fixedly connected to one side of the hoop 13, and the hoop 13 is tightly fitted with the inner wall of the heat exchange tube 9;

[0068] A cooling device is provided inside the lower head 3. The cross-sectional view of the lower head and the cooling device is shown in FIG. Figure 3 As shown, the cooling device includes a cooling plate 6 and a connecting pipe 8, adjacent cooling plates 6 of each level are connected by the connecting pipe 8, an overflow weir 7 is arranged below the connecting pipe 8, the cooling device includes a coolant inlet f and a coolant outlet g, and the position of the coolant outlet g is higher than the coolant inlet f; a non-condensable gas outlet b is also arranged on the side wall of the lower head 3, and the non-condensable gas outlet b is arranged close to the flange 4, and the position of the non-condensable gas outlet b is higher than the coolant outlet g; a coolant outlet c is arranged at the bottom of the lower head 3.

[0069] Example 4

[0070] This embodiment provides a condenser, which is a shell-and-tube condenser. 304 heat exchange tubes 9 are arranged inside the shell 1. The heat exchange tubes 9 are 2000 mm long and have an inner diameter of 15 mm.

[0071] Each heat exchange tube 9 is provided with a plug 10 inside. The plug 10 includes a hanging sheet 11, a rib 12, a hoop 13 and a whisker 14. Three ribs 12 are fixedly connected to one side of the hanging sheet 11 at equal intervals. Three hoop 13 are fixedly connected to each rib 12. Adjacent hoop 13 are arranged at equal intervals. The whisker 14 is fixedly connected to one side of the hoop 13. The hoop 13 is tightly fitted with the inner wall of the heat exchange tube 9.

[0072] A cooling device is provided inside the lower head 3, and the cooling device includes cooling plates 6, wherein the number of stages of the cooling plates 6 is 4, and adjacent cooling plates 6 are arranged at equal intervals;

[0073] The other structures of the condenser are the same as those in Example 3.

[0074] Comparative Example

[0075] In this comparative example, except that the plug 10 is not provided inside the heat exchange tube 9, other conditions are the same as those of Example 4.

[0076] Application Examples

[0077] This application example uses the condenser provided in Example 4 to condense and recover acetic anhydride and methyl acetate, and the inlet temperature is 80-110°C;

[0078] The gas to be condensed enters the condenser from the gas inlet a, flows through the upper head 2 and enters the condenser tube 9. The solvent condenses in the upper section of the heat exchange tube 9. When it flows downward along the inner wall of the tube, it encounters the hoop 13 of the plug 10, and the laminar flow of the liquid film is destroyed. Under the action of gravity, the liquid film leaves the inner wall of the heat exchange tube 9, gathers on the beard 14 of the plug, and flows down from the center of the heat exchange tube 9. Below the hoop 13, the gas further exchanges heat and condenses.

[0079] The condensing medium is circulating water, with an inlet temperature of 30°C and an outlet temperature of 33°C. The condensing medium enters the shell from the condensing medium inlet d, and is evenly distributed inside the shell by the baffle 5, countercurrently condenses the material to be condensed inside the heat exchange tube 9, and flows out of the shell from the condensing medium outlet e.

[0080] After the condensate flows out of the heat exchange tube 9, it drips onto the heat exchange plate 6 of the heat exchange device inside the lower head 4, and flows through the heat exchange plate 6 step by step through the overflow weir 7, and flows out from the condensate outlet c at the bottom of the lower head after cooling;

[0081] The cooling medium is circulating water, with an inlet temperature of 30°C and an outlet temperature of 32°C. The cooling medium enters the cooling plate 9 from the cooling medium inlet f, flows through the heat exchange plate 6 step by step, and then flows out of the cooling device from the cooling medium outlet g.

[0082] After the non-condensable gas flows out of the heat exchange tube 9, it moves out of the condenser through the non-condensable gas outlet b.

[0083] The temperature of the solvent at the coolant outlet c was measured to be 36°C; the overall heat transfer efficiency of the condenser was calculated to be 310w / m 2 ℃.

[0084] Comparative Application Examples

[0085] This comparative example uses the condenser provided in the comparative example to condense and recover the solvent, and other conditions are the same as those in the application example;

[0086] The temperature of the solvent at the coolant outlet c was measured to be 35°C; the overall heat transfer efficiency of the condenser was calculated to be 190w / m 2 ℃.

[0087] The applicant declares that the utility model illustrates the detailed structural features of the utility model through the above-mentioned embodiments, but the utility model is not limited to the above-mentioned detailed structural features, that is, it does not mean that the utility model must rely on the above-mentioned detailed structural features to be implemented. Those skilled in the art should understand that any improvement to the utility model, equivalent replacement of the components selected by the utility model, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the utility model.

[0088] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0089] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0090] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A condenser, characterized in that: The condenser comprises a shell, and a heat exchange tube arranged inside the shell, and a plug is arranged inside the heat exchange tube; The plug comprises a hoop portion and a whisker portion, wherein the whisker portion is fixedly connected to one side of the hoop portion; The condenser comprises an upper head and a lower head, wherein the upper head and the lower head are independently connected to the shell through flanges, and a cooling device is arranged in the lower head.

2. The condenser according to claim 1, characterized in that The outer diameter of the hoop portion is not greater than the inner diameter of the heat exchange tube.

3. The condenser according to claim 1, characterized in that The plug also includes a hanging piece and a rib portion; The rib portion is fixedly connected to one side of the hanging piece; The hoop portion is fixedly connected to the rib portion.

4. The condenser according to claim 1, characterized in that The cooling device comprises a cooling component and a connecting component, and adjacent cooling components are connected via the connecting component.

5. The condenser according to claim 4, characterized in that: The cooling device also includes an overflow component, and the overflow component is arranged below the connecting component.

6. The condenser according to claim 1, characterized in that: The cooling device includes a cooling medium inlet and a cooling medium outlet.

7. The condenser according to claim 6, characterized in that The coolant outlet is located higher than the coolant inlet.

8. The condenser according to claim 1, characterized in that The lower head is provided with a non-condensable gas outlet.

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