CN219454716U - Coiled pipe type heat exchanger - Google Patents

Abstract

The utility model belongs to the technical field of heat exchangers, in particular to a coiled tube type heat exchanger for improving heat exchange efficiency, wherein a steam supplementing port and a second water outlet are additionally arranged on a coiled tube body at intervals, so that the heat exchanger is divided into a plurality of heat exchange sections which are sequentially communicated to form a heat exchange system for sectionally feeding steam and sectionally discharging water, steam entering from a steam inlet can sequentially flow downwards into each heat exchange section along a pipeline, each heat exchange section is ensured to have basic heat, the steam entering from the steam supplementing port sequentially flows into each heat exchange section, the continuous steam supplementing from top to bottom is realized, the problem of uneven heat distribution caused by longer coiled tube body is solved, the water outlet is arranged at each heat exchange section, condensate water at corresponding positions can be timely discharged, the condition that condensate water at the upper part of a pipeline can only be discharged from the first water outlet at last can not occur, and a large-area thick water film is avoided, and therefore the heat transfer efficiency and the heat exchange effect are improved.

Description

Coiled pipe type heat exchanger

Technical Field

The utility model belongs to the technical field of heat exchangers, and particularly relates to a coiled tube type heat exchanger capable of improving heat exchange efficiency.

Background

Coil heat exchangers are commonly used for heating fluid materials in large-capacity tanks, and comprise a spiral tube with an inlet at the head end and a water outlet at the tail end, wherein a pipeline is arranged in the spiral tube, and heat exchange is realized by introducing media into the pipeline. In some processes, steam is often used as a circulating medium to raise the temperature of the material in the tank, for example, the problem that the viscosity of the material is too high at normal temperature to be transported is solved, and in other processes, in order to evaporate the water or solvent in the material in the tank, steam is often used as a heating medium to evaporate the material to realize separation. In order to ensure heat exchange quantity, the heat exchange tube needs to be long enough, but in the actual heat exchange process, condensed water can be continuously produced in the tube, the condensed water forms a water film on the tube wall, when the condensed water is closer to the tail end of the tube, the condensed water is accumulated and the more the condensed water is, the larger the water film is covered, the thicker the water film is, so that the heat transfer efficiency is seriously affected, the heat exchange efficiency is reduced, the materials at all parts in the tank body are heated unevenly, and the higher the temperature is, the lower the temperature of the materials is, which is closer to the water outlet at the tail end.

Disclosure of Invention

The utility model aims to overcome the defects of low heat exchange efficiency and uneven heat transfer of a coil heat exchanger and provides the coil heat exchanger with high heat exchange efficiency and even heat transfer.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a coiled pipe heat exchanger, includes the coil pipe body that the spiral extends, this internal pipeline that is equipped with of coil pipe, its head end and end are equipped with the intercommunication in proper order steam inlet and the first outlet of pipeline, certainly steam inlet extremely first outlet, the coil pipe body is equipped with a plurality of second outlet of intercommunication respectively along its extending direction interval the pipeline to all be equipped with the intercommunication between two adjacent second outlet and between last second outlet and the first outlet the steam of pipeline supplements the mouth, steam inlet with the steam supplements the mouth and is used for connecting the steam source.

Compared with the prior art, the coiled tube type heat exchanger provided by the utility model has the advantages that the steam inlet and the water outlet are sequentially arranged at the head end and the tail end of the pipeline as well as the steam supplementing port and the second water outlet are additionally arranged on the spiral coil body from top to bottom at intervals, so that the heat exchanger is divided into a plurality of heat exchange sections which are sequentially communicated in a form of one steam input end, the spiral pipeline and one water outlet end, a heat exchange system for sectionally feeding steam and sectionally discharging water is formed, the steam entering the pipeline through the steam inlet at the uppermost end can sequentially flow into each heat exchange section downwards along the pipeline, so that basic heat is ensured to be in each heat exchange section, the steam entering from the steam supplementing port sequentially flows into each heat exchange section from top to bottom, the continuous supplement of the steam from top to bottom is realized, the problem of uneven heat distribution caused by the longer coil body is solved, meanwhile, the water outlet at the corresponding part can be timely discharged, the condition of each heat exchange section flowing through the last position of the pipeline from top to bottom can not occur, the water outlet at the top to bottom can only be greatly increased, the heat exchange efficiency of the water film is greatly improved, and the heat exchange effect is greatly improved.

Furthermore, the length of the coil body between two adjacent second water outlets and the length of the coil body between the last second water outlet and the first water outlet are x, and by the arrangement, condensed water generated between every two adjacent second water outlets and condensed water generated between the last second water outlet and the first water outlet can flow through the same path length, so that the heat of each section in a pipeline is ensured to be uniform, and the heat exchange capacity of each part of the heat exchanger from top to bottom is relatively uniform and stable.

Further, the steam supplementing port is correspondingly arranged at the middle position of the coil body between the two adjacent second water outlets and the middle position between the last second water outlet and the first water outlet, and the consistency of the steam supplementing position between the two adjacent water outlets can be ensured through the arrangement, so that the heat exchange capacity of each part in the pipeline is ensured to be relatively uniform and stable.

Further, the length of the coil body from the steam inlet to the first and second water outlets is x, so that heat of each part of the pipeline is kept uniform.

Furthermore, the steam inlet and the steam supplementing port are both provided with regulating valves, so that an operator can regulate the steam inlet quantity of the corresponding part according to actual conditions.

Further, the device is used for obtaining the total flow q of liquid in the pipeline, the effective sectional area of the inner diameter of the coil body is defined as s, the length of the coil body is defined as y, and x=y/(q 0.5 s/10) is defined.

Drawings

Fig. 1 is a schematic view of a coil heat exchanger.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings. In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Referring to fig. 1, the present embodiment provides a coiled heat exchanger comprising a coiled pipe body 1 extending spirally, the coiled pipe body 1 is hollow to form a pipeline corresponding to the shape of the coiled pipe body 1, a steam inlet 2 and a first water outlet 3 which are communicated with the pipeline are sequentially arranged at the head end and the tail end of the coiled pipe body 1, a plurality of second water outlets 4 which are communicated with the pipeline are arranged at intervals along the extending direction of the coiled pipe body 1 from the steam inlet 2 to the first water outlet 3, and a steam supplementing port 5 which is communicated with the pipeline is arranged between two adjacent second water outlets 4 and between the last second water outlet 4 and the first water outlet 3, wherein the steam inlet 2 and the steam supplementing port 5 are used for being connected with an external steam source so that steam flows through the pipeline for heat exchange, for example, in the present embodiment, two steam supplementing ports (51, 52) and two second water outlets (41, 42) are alternately arranged at intervals between the steam inlet 2 and the first water outlet 3.

Compared with the prior art, the coiled tube type heat exchanger provided by the utility model has the advantages that the steam inlet 2 and the water outlet are sequentially arranged at the head end and the tail end of the pipeline as well as the steam supplementing port 5 and the second water outlet 4 are additionally arranged on the spiral coil body 1 from top to bottom at intervals, so that the heat exchanger is divided into a plurality of heat exchange sections which are sequentially communicated in a mode of one steam input end, the spiral pipeline and one water outlet end, a heat exchange system for sectionally entering steam and sectionally discharging water is formed, steam entering the pipeline through the steam inlet 2 at the uppermost end can sequentially flow into each heat exchange section along the pipeline, so that basic heat is ensured to flow into each heat exchange section from the steam supplementing port 5 in an equal way, the problem of uneven heat distribution caused by longer coil body 1 is solved, meanwhile, the water outlet at each heat exchange section is provided with one condensed water in time, the condition of discharging water at the corresponding position can not occur, the heat exchange effect of the water film at the last position of the pipeline from top to bottom can be greatly improved, and the heat exchange effect of water film is greatly improved.

In a specific embodiment, the length of the coil body 1 between two adjacent second water outlets 4 and the length of the coil body between the last second water outlet 4 and the first water outlet 3 are x, and by the arrangement, the condensed water generated between every two adjacent second water outlets 4 and the condensed water generated between the last second water outlet 4 and the first water outlet 3 can have the same path length, so that the heat of each section in the pipeline is uniform, and the heat exchange capacity of each section of the heat exchanger from top to bottom is relatively uniform and stable. As shown in fig. 1, the length of the coil body 1 from the first second drain opening 41 to the second drain opening 42 and the length of the second drain opening 42 to the first drain opening 3 are the length of the coil body 1 spirally extending 4 layers.

The steam supplementing port is correspondingly arranged at the middle position of the coil pipe body 1 between two adjacent second water outlets 4 and the middle position between the last second water outlet 4 and the first water outlet 3. Through the arrangement, the consistency of the steam supplementing positions between the two adjacent drainage ends can be ensured, so that the heat exchange capacity of each part in the pipeline is ensured to be relatively uniform and stable.

To further maintain uniform heat throughout the various sections of the tubing, the coil body 1 is positioned at the steam inlet 2 to the first and second drain openings 4 at a length x such that the path length of condensate generated in the tubing before each drain end is the same.

In order to mechanically adjust the steam input quantity of each steam input end, the steam inlet 2 and the steam supplementing port 5 are respectively provided with a regulating valve 7, an operator can change the steam input quantity of each steam input end through the corresponding regulating valve 7 according to actual conditions, for example, steam flows from top to bottom, the steam supplementing ports 5 are arranged at preset positions, and in order to avoid excessive steam quantity at the lower part, the steam compensating quantity at the lower part can be reduced through the corresponding regulating valve 7, so that the heat exchange capacity of each part of the pipeline is ensured to be relatively uniform and stable.

The following provides a way to obtain the length x, where the heat exchanger further includes a step for obtaining a total flow q of the liquid in the pipeline, where the total flow q is a sum of flows of each segment of the pipeline, and an effective cross-sectional area of the inner diameter of the coil body 1 is defined as s, and a length of the coil body 1 is defined as y, so that x=y/(q×0.5×s/10). The effective sectional area s is calculated through the inner diameter of the coil body 1, the effective sectional area is calculated in the prior art, the explanation is omitted, the total flow q of the condensed water is measured, the measured total flow q is divided by the natural flow rate (0.5 m/s) of the liquid, the instantaneous sectional area of the condensed water is calculated, the instantaneous sectional area of the condensed water is divided by the effective sectional area s and multiplied by 10 to obtain the number of segments, and the length y of the coil body 1 is divided by the number of segments to obtain the length x.

Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.

Claims (6)

1. The utility model provides a coiled tube heat exchanger, includes spiral extension's coil pipe body (1), be equipped with the pipeline in coil pipe body (1), its head end and end are equipped with the intercommunication in proper order steam inlet (2) and first outlet (3) of pipeline, its characterized in that, from steam inlet (2) extremely first outlet (3), coil pipe body (1) are equipped with a plurality of second outlet (4) of intercommunication respectively along its extending direction interval the pipeline to all be equipped with the intercommunication between two adjacent second outlet (4) and between last second outlet (4) and first outlet (3) steam supply mouth (5) of pipeline, steam inlet (2) with steam supply mouth (5) are used for connecting the steam source.

2. A coiled heat exchanger according to claim 1, wherein the length of the coiled tube body (1) between two adjacent second water outlets (4) and the length between the last second water outlet (4) and the first water outlet (3) are x.

3. A coiled tube heat exchanger according to claim 2, wherein the steam supplementing port (5) is correspondingly arranged at a middle position between two adjacent second water outlets (4) of the coiled tube body (1) and at a middle position between the last second water outlet (4) and the first water outlet (3).

4. A coil heat exchanger according to claim 2 or 3, wherein the coil body (1) is located at a length x from the steam inlet (2) to the first and second drain openings (4).

5. Coil heat exchanger according to claim 1, characterized in that the steam inlet (2) and the steam make-up port (5) are each provided with a regulating valve (7).

6. A coil heat exchanger according to claim 4, further comprising metering means (6), said metering means (6) being adapted to obtain a total flow rate q of liquid in the tube, defining an effective cross-sectional area s of the inner diameter of the coil body (1) and a length y of the coil body (1) such that x = y/(q 0.5 s/10).