CN106979710B - A heat exchanger and a heat exchange method for modularly assembling a coiled plate heat exchange body - Google Patents

Abstract

The invention discloses a heat exchanger and a heat exchange method for modularly assembling a rolled plate heat exchange body, belonging to the technical field of heat exchangers. The heat exchanger of the present invention includes a flow medium inlet, a flow medium outlet, a coiled plate heat exchange body, an intermediate partition plate and a heat exchanger shell, the intermediate partition plate is arranged inside the heat exchanger shell, and the intermediate partition plate is provided with There are a plurality of installation holes, the coiled plate heat exchange body is inserted into the installation holes, the flow medium inlet is communicated with the through holes of the first transverse plate and the second transverse plate through holes, and the flow medium outlet is communicated with the through holes on both sides of the coiled plate heat exchange body , the coiled plate heat exchange body is made of flat plate folded in half at 1/2 and rolled in the same direction, and annular tracks m and n are formed inside. In the present invention, all the heat exchange bodies constituting one of the heat exchanger structures adopt the coiled plate heat exchange body structure, which can be arbitrarily combined and installed according to various installation spaces and occasions, with simple processing and convenient installation and maintenance.

Description

A heat exchanger and a heat exchange method for modularly assembling a coiled plate heat exchange body

technical field

The present invention relates to the technical field of heat exchangers, and more particularly, to a coiled plate heat exchange body, a heat exchanger for modularly assembled coiled plate heat exchange bodies, and a heat exchange method.

Background technique

Due to environmental pollution problems, traditional electric heating, boilers and other low-efficiency and heavy-polluting hot water devices will be gradually discontinued, and replaced by high-efficiency heat pump hot water devices. At present, the heat exchangers used in heat pump hot water installations are mainly divided into two types: casing type and plate type. For example, the heat exchange body of the current coaxial body combined heat exchanger is mainly composed of steel pipes. Practice has proved that the heat exchanger composed of multiple steel tube heat exchangers has high heat exchanger efficiency and pressure bearing capacity, but its application is limited by the size of the steel tube. In order to adapt to different installation spaces, it is necessary to customize the size of steel pipes of specific types, which increases the production difficulty and cycle of heat exchangers.

The traditional spiral plate heat exchanger is made by processing two parallel steel plates on a special rolling bed. The two steel plates are wound into a spiral shape to form two long concentric spiral channels isolated from each other. The cross-section of the channel is rectangular. The outlet nozzle is installed at the edge of the two channels, and the medium can be uniformly heated and cooled in the channels. Spiral plate heat exchangers have the characteristics of compact size, high heat transfer efficiency, simple manufacture, low cost, and low temperature differential heat exchange. They are more and more widely used in various industries.

However, in many industrial processes, fouling of heat exchangers is a concern. Some data show that the scaling rate of water quality is related to water quality components, water temperature, flow rate, residence time, etc. The higher the water temperature, the longer the residence time and the worse the water quality, the faster the water scaling rate. Therefore, for the spiral plate heat exchanger, when the cold water flows through the spiral plate heat exchanger and exchanges heat with the refrigerant, it becomes high-temperature hot water. Due to the small flow channel area, it flows in one direction for a long time, and the flow resistance is large and poor. The water quality is easy to scale on the inner surface of the plate heat exchanger, which reduces the efficiency of the spiral plate heat exchanger and increases the flow resistance. Therefore, the spiral plate heat exchanger is more prone to fouling than the casing heat exchanger, resulting in a decrease in the overall performance of the heat exchanger. In order to maintain satisfactory performance of the equipment in normal operation, the non-permanently joined heat exchanger will eventually need to be opened and cleaned, but the cleaning and maintenance of the existing spiral plate heat exchanger is a big problem.

After retrieval, the Chinese patent number is ZL201410161812.4, the date of authorization announcement is September 23, 2015, the name of the invention is: a modular spiral plate heat exchanger, the application includes at least two heat exchanger units, the first A heat exchanger unit is vertically stacked on the second heat exchanger unit, and the first heat exchanger unit and the second heat exchanger unit are fixedly connected by fasteners. This application changes the connection tube arrangement form of the traditional spiral plate heat exchanger, making it easy for modular expansion. At the same time, the spiral wall plate of the heat exchanger is provided with an equal-phase enhanced heat-exchange corrugated surface, and through the equal-phase radiation pattern The corrugated structure enhances local turbulence and maintains low flow resistance while maintaining efficient heat exchange. However, in this application, the first heat exchanger unit and the second heat exchanger unit are connected through the joint pipe fitting and the outer connecting pipe, and the flow resistance of the fluid passing through the joint pipe fitting and the outer connecting pipe is relatively large, and this problem has not been paid enough attention. ; and the overall structure of the application is relatively complex, the processing and manufacturing costs are high, and the practicability needs to be enhanced.

SUMMARY OF THE INVENTION

1. The technical problem to be solved by the invention

Aiming at the problems existing in the above-mentioned prior art, the present invention provides a coiled plate heat exchange body, a heat exchanger and a heat exchange method for modularly assembled coiled plate heat exchange bodies. The present invention will constitute one of the heat exchanger structures. The heat exchange body adopts the structure of coiled plate heat exchange body, which can be combined and installed arbitrarily according to each installation space and occasion. The processing is simple, the installation and maintenance are convenient, and the sealing performance of the heat exchanger can be ensured during the working process, which improves the heat exchange. efficiency, reducing thermal energy waste and production costs.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the invention is:

A coiled plate heat exchange body of the present invention comprises a pipe seal, a first transverse plate and a second transverse plate. The coiled plate heat exchange body is formed by folding a flat plate in half at 1/2 and rolling in the same direction, so Annular tracks m and n are formed inside the coiled plate heat exchange body, pipe seals are arranged on both sides of the coiled plate heat exchange body, through holes are opened on the pipe seals, and the upper and lower exits of the tubular main body along the axis direction are respectively formed by the first horizontal plate, the second horizontal plate and the second plate. The two transverse plates are closed, the first transverse plate is provided with a first transverse plate through hole, and the second transverse plate is provided with a second transverse plate through hole.

As a further improvement of the present invention, the through hole on one side of the tube seal communicates with the annular track m, and the through hole on the other side tube seal communicates with the annular track n.

A heat exchanger for modularly assembling a coiled plate heat exchange body of the present invention includes a flow medium inlet, a flow medium outlet, a coiled plate heat exchange body, an intermediate partition plate and a heat exchanger shell, and the intermediate partition plate is provided with Inside the heat exchanger shell, the middle partition plate is provided with a plurality of installation holes, the coiled plate heat exchange body is inserted into the installation holes, and the flow medium inlet is communicated with the first transverse plate through holes and the second transverse plate through holes, The outlet of the flowing medium is communicated with the through holes on both sides of the coiled plate heat exchange body.

As a further improvement of the present invention, the middle partition plate is located between the through hole of the first transverse plate and the through hole of the second transverse plate.

As a further improvement of the present invention, the arrangement of the coiled-plate heat exchange bodies on the middle partition plate is a triangle type, a corner triangle type, a square type or a corner square type.

As a further improvement of the present invention, the coiled plate heat exchange body is fixed by the tube plates symmetrically arranged on both sides of the heat exchanger, and the shape and structure of the tube plates are the same as that of the middle partition plate.

As a further improvement of the present invention, the heat exchanger includes a flow medium a inlet, a flow medium a outlet, a flow medium b inlet, and a flow medium b outlet, and the flow medium a inlet and the flow medium b inlet are symmetrically distributed in the heat exchanger. On the surface of the shell, the inlet of the flowing medium a is communicated with the through hole of the first transverse plate, and the inlet of the flowing medium b is communicated with the through hole of the second transverse plate; the outlet of the flowing medium a and the outlet of the flowing medium b are symmetrically distributed in the heat exchanger At the left and right ends of the casing, the outlet of the flowing medium a and the outlet of the flowing medium b are respectively communicated with through holes provided on both sides of the coiled plate heat exchange body.

As a further improvement of the present invention, the heat exchanger is of a horizontal structure, and two supports are symmetrically arranged at the bottom of the heat exchanger shell.

The present invention utilizes the method for heat exchange by using the heat exchanger for modularly assembling the coiled plate heat exchange body. The flow medium a flows in from the inlet of the flow medium a, and enters each coil through the through holes of the first transverse plate on each coiled plate heat exchange body. In the annular track m of the plate heat exchange body; the flow medium b flows in from the inlet of the flow medium b, and enters the annular track n of each coiled plate heat exchange body through the second transverse plate through holes on each coiled plate heat exchange body; the flow medium a and b flow in the opposite direction through the spaced rails m and n in the coiled plate heat exchange body, and finally flow out from the outlet of the flowing medium a and the outlet of the flowing medium b respectively to realize the heat exchange of the two media.

3. Beneficial effects

Adopting the technical scheme provided by the present invention, compared with the existing known technology, has the following remarkable effects:

(1) A coiled plate heat exchange body of the present invention is formed by rolling a flat plate in the same direction after being folded in half at 1/2, and annular tracks m and n are formed inside it, which is helpful for the flow of the flowing medium , effectively preventing the accumulation of dirt on the inner surfaces of the circular orbits m and n due to long-term operation, and at the same time, the heat exchange efficiency between the flowing media is also improved;

(2) A heat exchanger of the present invention for modularly assembling a coiled plate heat exchange body, which is provided with a middle partition plate inside the heat exchanger shell, and the middle partition plate is provided with a plurality of shapes corresponding to the coiled plate heat exchange body. Matching installation holes, according to the needs of each installation space and occasion, different numbers of coiled plate heat exchangers can be inserted into the installation holes, and then fixed by the tube sheets on both sides to complete any combination and installation of coiled plate heat exchangers. It is also very convenient to carry out maintenance and cleaning under unavoidable circumstances;

(3) A heat exchanger of the present invention for modularly assembling a coiled plate heat exchange body, the middle partition plate divides the interior of the heat exchanger shell into two parts, forming the converging cavities of the flowing media a and b respectively, the flowing media a and the b In the coiled plate heat exchange body, the spaced tracks m and n flow in the opposite direction, and the medium has high sealing performance during the flow process, which improves the heat exchange efficiency of the heat exchanger, reduces the waste of heat energy, and reduces the production cost at the same time;

(4) The heat exchanger of the present invention for modularly assembling a coiled plate heat exchange body adopts the coiled plate heat exchange body structure for all the heat exchange bodies constituting one of the heat exchanger structures, which has the advantages of simple structure, low manufacturing cost and practicality. Strong sex.

Description of drawings

Fig. 1 is the structure schematic diagram of the heat exchanger of the present invention;

Fig. 2 is the structural schematic diagram of the coiled plate heat exchange body in the present invention;

Fig. 3 is the side view structure schematic diagram of the coiled plate heat exchange body in the present invention;

FIG. 4 is a schematic diagram of the structure of the middle partition plate of the present invention.

Description of the labels in the diagram:

1. Support; 2. Inlet of flowing medium a; 3. Outlet of flowing medium a; 4. Inlet of flowing medium b; 5. Outlet of flowing medium b; ; 63, the first transverse plate through hole; 64, the second transverse plate through hole; 65, the first transverse plate; 66, the second transverse plate; 7, the tube plate; 8, the middle partition plate; 81, the mounting hole; 9 , heat exchanger shell.

Detailed ways

In order to further understand the content of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

Example 1

2 and 3, a coiled plate heat exchange body in this embodiment includes a pipe seal 61, a first transverse plate 65, a second transverse plate 66 and a flat plate, and the coiled plate heat exchange body 6 consists of a flat plate in 1 /2 is folded in half and rolled in the same direction, and the rolled tubular body forms annular tracks m and n inside. Pipe seals 61 are provided on both sides of the tubular body, and through holes 62 are opened on the pipe seals 61. One side through hole 62 communicates with the annular track m, and the other side through hole 62 communicates with the annular track n. The upper and lower outlets of the tubular body along the axis direction They are closed by a first horizontal plate 65 and a second horizontal plate 66 respectively. The first horizontal plate 65 is provided with a first horizontal plate through hole 63 and the second horizontal plate 66 is provided with a second horizontal plate through hole 64 . The first transverse plate through holes 63 and the second transverse plate through holes 64 are located at both ends of the tubular body in the longitudinal direction. The structural design of the coiled plate heat exchange body in this embodiment is helpful for the flow of the flowing medium, effectively preventing the accumulation of dirt on the inner surfaces of the annular rails m and n due to long-term operation, and at the same time, the heat exchange efficiency between the flowing medium is also improved.

Example 2

Referring to FIG. 1 , a heat exchanger for modularly assembling a coiled plate heat exchange body in this embodiment includes a support 1 , an inlet 2 of a flowing medium a, an outlet 3 of a flowing medium a, an inlet 4 of a flowing medium b, and an outlet of the flowing medium b 5. The coiled plate heat exchange body 6 , the tube sheet 7 , the intermediate partition plate 8 and the heat exchanger shell 9 as described in Embodiment 1. The heat exchanger in this embodiment is a horizontal heat exchanger, two supports 1 are symmetrically arranged at the bottom of the heat exchanger shell 9, the horizontal heat exchanger is supported by the supports 1, and the middle partition 8 is provided Inside the heat exchanger shell 9, referring to FIG. 4, the middle partition plate 8 is provided with a plurality of mounting holes 81 that match the shape of the coiled plate heat exchange body 6, and the coiled plate heat exchange body 6 is inserted into the mounting holes 81, The tube sheets 7 symmetrically arranged on both sides of the heat exchanger are fixed, and the shape and structure of the tube sheets 7 are the same as that of the middle partition plate 8 .

In this embodiment, different numbers of coiled plate heat exchange bodies 6 can be inserted into the installation holes 81 according to the needs of each installation space and occasion to complete any combination and installation of the coiled plate heat exchange bodies 6 . The arrangement on the middle partition plate 8 can be triangular, corner triangle, square or corner square. Specifically, in this embodiment, the arrangement of the coiled plate heat exchange bodies 6 on the middle partition 8 is triangular. In the fixing mode of the coiled plate heat exchange body 6 in this embodiment, it is also very convenient to disassemble and clean the heat exchanger.

The first transverse plate through holes 63 and the second transverse plate through holes 64 of the coiled plate heat exchange body 6 are arranged on both sides of the middle partition plate 8, and the flow medium a inlet 2 and the flow medium b inlet 4 are symmetrically distributed in the heat exchanger shell. On the surface of the body 9, the flow medium a inlet 2 is communicated with the first transverse plate through hole 63, the flow medium b inlet 4 is communicated with the second transverse plate through hole 64; the flow medium a outlet 3, the flow medium b outlet 5 Symmetrically distributed at the left and right ends of the heat exchanger shell 9, specifically, the outlet 3 of the flow medium a is arranged at one end close to the inlet 4 of the flow medium b, and the outlet 5 of the flow medium b is arranged at one end close to the inlet 2 of the flow medium a, and flows The medium a outlet 3 and the flowing medium b outlet 5 are respectively communicated with through holes 62 provided on both sides of the coiled plate heat exchange body 6 .

When the heat exchanger of this embodiment is in operation, the flowing medium a flows in from the inlet 2 of the flowing medium a, and the middle partition plate 8 divides the interior of the heat exchanger shell 9 into two parts, forming the converging cavities of the flowing mediums a and b, respectively. a enters into the annular track m of each coiled plate heat exchange body 6 through the first transverse plate through holes 63 on each coiled plate heat exchange body 6; at the same time, the flowing medium b flows in from the flowing medium b inlet 4 and passes through each coiled plate The second transverse plate through holes 64 on the heat exchange body 6 enter into the annular track n of each coiled plate heat exchange body 6; the flowing media a and b flow in the opposite direction in the coiled plate heat exchange body 6 through the spaced tracks m and n, and finally They flow out from the outlet 3 of the flowing medium a and the outlet 5 of the flowing medium b respectively to realize the heat exchange of the two mediums.

In the heat exchanger of this embodiment, the middle partition plate 8 divides the interior of the heat exchanger shell 9 into two parts, forming the converging cavities of the flowing media a and b respectively, and the flowing media a and b are separated in the coiled plate heat exchange body 6 The orbits m and n of the traverse flow in the opposite direction, and the medium has high sealing performance during the flow process, which improves the heat exchange efficiency of the heat exchanger, reduces the waste of heat energy, and reduces the production cost at the same time.

Example 3

A coiled plate heat exchange body, a heat exchanger and a heat exchange method for modular assembly of a coiled plate heat exchange body in this embodiment are basically the same as those in Embodiment 2, except that the coiled plate heat exchange body in this embodiment is different. The arrangement of 6 on the middle partition plate 8 is a corner triangle type.

Example 4

A coiled plate heat exchange body, a heat exchanger and a heat exchange method for modular assembly of a coiled plate heat exchange body in this embodiment are basically the same as those in Embodiment 2, except that the coiled plate heat exchange body in this embodiment is different. The arrangement of 6 on the middle partition plate 8 is square.

Example 5

A coiled plate heat exchange body, a heat exchanger and a heat exchange method for modular assembly of a coiled plate heat exchange body in this embodiment are basically the same as those in Embodiment 2, except that the coiled plate heat exchange body in this embodiment is different. The arrangement of 6 on the middle partition plate 8 is a corner square.

The present invention and its embodiments have been described above schematically, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, which shall belong to the protection scope of the present invention. .

Claims (7)

1. A heat exchanger for modularly assembling a coiled plate heat exchange body, comprising a flow medium inlet, a flow medium outlet and a heat exchanger shell (9), characterized in that it also includes a middle partition plate (8) and a coil plate A heat exchange body (6), the coiled plate heat exchange body (6) comprises a pipe seal (61), a first transverse plate (65), and a second transverse plate (66). The coiled plate heat exchange body is composed of a flat plate After being folded in half at 1/2, it is rolled in the same direction. The inside of the coiled plate heat exchange body forms annular tracks m and n, and the coiled plate heat exchange body is provided with pipe seals (61) on both sides. A through hole (62) is opened, and the upper and lower outlets of the tubular body along the axial direction are respectively closed by a first transverse plate (65) and a second transverse plate (66), and the first transverse plate (65) is provided with a first transverse plate a through hole (63), the second transverse plate (66) is provided with a second transverse plate through hole (64); the intermediate partition plate (8) is arranged inside the heat exchanger shell (9), the intermediate partition The plate (8) is provided with a plurality of mounting holes (81), the coiled plate heat exchange body (6) is inserted into the mounting holes (81), and the flow medium inlet communicates with the first transverse plate through holes (63) and the second transverse plate. The holes (64) are communicated with each other, and the flow medium outlet is communicated with the through holes (62) on both sides of the coiled plate heat exchange body (6). 2 . The heat exchanger of claim 1 , wherein the through hole ( 62 ) on one side of the pipe seal ( 61 ) communicates with the annular track m, and the other side The through hole (62) on the pipe seal (61) communicates with the annular track n. 3. A heat exchanger for modularly assembling a coiled plate heat exchange body according to claim 2, characterized in that: the middle partition plate (8) is located between the first transverse plate through hole (63) and the second transverse plate through hole (63) between the transverse plate through holes (64). 4. A heat exchanger for modularly assembling a coiled plate heat exchange body according to claim 3, characterized in that: the coiled plate heat exchange body (6) passes through pipes symmetrically arranged on both sides of the heat exchanger The plate (7) is fixed, and the shape and structure of the tube plate (7) is the same as that of the intermediate partition plate (8). 5. A heat exchanger for modularly assembling a coiled plate heat exchange body according to claim 4, characterized in that: the heat exchanger comprises a flow medium a inlet (2) and a flow medium a outlet (3) , Flow medium b inlet (4), flow medium b outlet (5), flow medium a inlet (2) and flow medium b inlet (4) are symmetrically distributed on the surface of the heat exchanger shell (9), flow medium a inlet ( 2) It is communicated with the first transverse plate through hole (63), and the flow medium b inlet (4) is communicated with the second transverse plate through hole (64); the flow medium a outlet (3) and the flow medium b outlet (5) Symmetrically distributed on the left and right ends of the heat exchanger shell (9), the flow medium a outlet (3) and the flow medium b outlet (5) are respectively connected to the two sides of the coiled plate heat exchange body (6). The through holes (62) communicate with each other. 6. A heat exchanger for modularly assembling a coiled plate heat exchange body according to claim 5, characterized in that: the heat exchanger is a horizontal structure, and the bottom of the heat exchanger shell (9) is symmetrical Two supports (1) are provided. 7. The method for heat exchange using the heat exchanger for modularly assembling a coiled plate heat exchange body according to claim 6, wherein the flow medium a flows in from the flow medium a inlet (2), and passes through each coiled plate heat exchange body (6) The through holes (63) of the upper first transverse plate enter into the annular track m of each coiled plate heat exchange body (6); the flow medium b flows in from the flow medium b inlet (4), and passes through each coiled plate heat exchange body (6). 6) The through hole (64) of the upper second transverse plate enters into the annular track n of each coiled plate heat exchange body (6); the orbits m, n of the flowing media a and b in the coiled plate heat exchange body (6) are spaced Reverse flow, and finally flow out from the outlet (3) of the flowing medium a and the outlet (5) of the flowing medium b, respectively, to realize the heat exchange of the two media.

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