Tube-plate combined efficient heat exchange device

Abstract

The utility model discloses a tube-plate combined efficient heat exchange device, which belongs to the technical field of heat exchange and comprises a shell, a heat exchange core cylinder assembly, a front-end heat exchange tube assembly, a rear-end heat exchange tube assembly and a discharge flue assembly. A water inlet pipe and a water outlet pipe are respectively processed on the shell; the front-end heat exchange tube assembly, the heat exchange core cylinder assembly and the rear-end heat exchange tube assembly are connected in sequence and are mounted in the shell; a cold fluid cavity and a hot fluid cavity are jointly formed by a plurality of heat exchange pipes and a plurality of heat exchange plates in the front end heat exchange pipe assembly, the rear end heat exchange pipe assembly and the heat exchange core cylinder assembly and the inner space of the shell. The cold fluid cavity is communicated with the water inlet pipe and the water outlet pipe; the open end of the front end of the shell is fixedly connected with a combustion chamber of the warmer, and the discharge flue assembly is fixedly connected to the open end of the rear end of the shell; and a smoke discharge pipe is processed at the bottom edge of the smoke discharge flue assembly. Through the combination of the tube plate and the tube plate, heat loss is reduced through tail gas discharged from the smoke outlet, and the heat exchange efficiency is improved through the combination of the tube plate and the tube plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchange, and in particular relates to a tube-sheet combined high-efficiency heat exchange device. Background Art

[0002] The heat exchange device is one of the key components of the heater. Its main function is to exchange heat released by the combustion in the heater's combustion chamber or high-temperature flue gas through the circulating water inside it.

[0003] The existing heater heat exchange device only realizes heat exchange through heat exchange tubes or heat exchange plates, so the heat exchange efficiency is basically around 60%. In addition, the temperature of the exhaust gas discharged through the exhaust port of the existing heater heat exchange device is as high as about 500°C, causing a large amount of heat loss. Therefore, an efficient heat exchange device is needed to reduce the loss of heat and increase the heat exchange efficiency. Utility Model Content

[0004] In view of this, the utility model provides a tube-sheet combined high-efficiency heat exchange device, which reduces heat loss by combining the tube-sheet and utilizing the exhaust gas discharged from the smoke outlet, and improves the heat exchange efficiency by combining the tube-sheet.

[0005] The utility model is realized by the following technical solutions:

[0006] A tube sheet combined high-efficiency heat exchange device, the heat exchange device comprises: a shell, a heat exchange core assembly, a front heat exchange tube assembly, a rear heat exchange tube assembly and a smoke exhaust duct assembly;

[0007] The front and rear ends of the shell are open, and a water inlet pipe and a water outlet pipe are processed on the shell respectively;

[0008] The front heat exchange tube assembly, the heat exchange core assembly and the rear heat exchange tube assembly are sequentially connected and installed inside the shell; the front heat exchange tube assembly includes: a cold fluid channel b and a hot fluid channel b formed by a plurality of heat exchange tubes, the heat exchange core assembly includes: a cold fluid channel a and a hot fluid channel a formed by a plurality of heat exchange plates, and the rear heat exchange tube assembly includes: a cold fluid channel c and a hot fluid channel c formed by a plurality of heat exchange tubes;

[0009] The hot fluid channel a, the hot fluid channel b and the hot fluid channel c together form a hot fluid cavity; the cold fluid channel b, the cold fluid channel a, the cold fluid channel c and the inner space of the shell together form a cold fluid cavity, and the cold fluid cavity is respectively connected to the water inlet pipe and the water outlet pipe;

[0010] The front opening end of the shell is fixedly connected to the combustion chamber of the heater, and the combustion chamber is communicated with one end of the hot fluid cavity; the smoke exhaust duct assembly is fixedly connected to the rear opening end of the shell, and the internal space of the smoke exhaust duct assembly is communicated with the other end of the hot fluid cavity; the bottom edge of the smoke exhaust duct assembly is processed with a smoke exhaust pipe.

[0011] Furthermore, the heat exchange core assembly further includes: a mounting frame a;

[0012] The mounting frame a is a rectangular structure with two ends open, and the mounting frame a is arranged along the length direction of the shell; the two open ends of the mounting frame a are respectively the front open end b and the rear open end b, the front open end b is opposite to the front open end of the shell, and the rear open end b is opposite to the rear open end of the shell; the two opposite side wall surfaces of the mounting frame a are respectively processed with a plurality of through holes of the same number and size, and the two opposite side wall surfaces are respectively surface a and surface b, the plurality of through holes on surface a are through holes a, the plurality of through holes on surface b are through holes b, and the through holes b are opposite to the through holes a one by one;

[0013] Each of the heat exchange plates is corrugated; a plurality of cold fluid channels a with openings at both ends are processed inside each heat exchange plate, and each two adjacent cold fluid channels a are equidistant and parallel to each other; the openings on the same end of all the cold fluid channels a are interconnected to form an open end of the heat exchange plate, and the openings on the other end of all the cold fluid channels a are interconnected to form another open end of the heat exchange plate;

[0014] The two open ends of each heat exchange plate are respectively fixedly connected to the opposite through hole a and through hole b; after being fixedly connected, the cold fluid channels a on every two adjacent heat exchange plates are staggered, so that there is a gap between the outer wall surfaces of every two adjacent heat exchange plates, and the outer wall surface of each heat exchange plate and the inner wall surface of the mounting frame a jointly form a hot fluid channel a; the internal space of each cold fluid channel a on each heat exchange plate is communicated with the internal space of the shell.

[0015] Furthermore, four supporting protrusions are respectively processed on the outer wall surfaces of the four side panels forming the front opening end b, and another four supporting protrusions are respectively processed on the outer wall surfaces of the four side panels forming the rear opening end b; the mounting frame a is welded to the inner wall surface of the outer shell through the eight supporting protrusions.

[0016] Furthermore, each of the supporting protrusions is processed with a plurality of semicircular notches.

[0017] Furthermore, the front end heat exchange tube assembly further comprises: a mounting frame b, so that the heat exchange tube of the front end heat exchange tube assembly is the front end heat exchange tube;

[0018] The mounting frame b is a four-sided pyramid structure with openings at both ends, the narrow end of the four-sided pyramid is fixedly connected to the front opening end of the shell, and the wide end is fixedly connected to the front opening end b of the heat exchange core assembly; the two opposite side wall surfaces of the mounting frame b are respectively processed with a plurality of circular through holes of the same number, so that the two opposite side wall surfaces of the mounting frame b are surface c and surface d, respectively, the plurality of through holes on surface c are through holes c, and the plurality of through holes on surface d are through holes d; and the plurality of through holes c are arranged in a conical shape from narrow to wide along the direction from the narrow end to the wide end; the through holes d are opposite to the through holes c one by one;

[0019] The two ends of the front-end heat exchange tubes are respectively welded to the corresponding through holes c and through holes d, and the internal space of each front-end heat exchange tube is connected with the internal space of the shell; the internal space of each front-end heat exchange tube serves as a cold fluid channel b; after being fixedly connected, there is a gap between the outer wall surfaces of every two adjacent front-end heat exchange tubes; the outer wall surface of each front-end heat exchange tube and the inner wall surface of the mounting frame b jointly form a hot fluid channel b.

[0020] Furthermore, the rear end heat exchange group further comprises: a mounting frame c, so that the heat exchange tubes of the rear end heat exchange tube assembly are the rear end heat exchange tubes;

[0021] The mounting frame c is a four-sided pyramid structure with openings at both ends, the narrow end of the four-sided pyramid is fixedly connected to the rear opening end of the shell, and the wide end is fixedly connected to the rear opening end b of the heat exchange core assembly; the two opposite side wall surfaces of the mounting frame c are respectively processed with a plurality of circular through holes of the same number, so that the two opposite side wall surfaces of the mounting frame c are surface e and surface f, respectively, the plurality of through holes on surface e are through holes e, and the plurality of through holes on surface f are through holes f; the plurality of through holes e are arranged in a tapered shape from wide to narrow along the direction from the wide end to the narrow end; the through holes f are opposite to the through holes e one by one;

[0022] The two ends of the plurality of rear end heat exchange tubes are respectively welded to the corresponding through holes e and through holes f, and the internal space of each rear end heat exchange tube is connected to the internal space of the shell; the internal space of each front and rear end heat exchange tube is a cold fluid channel c; after being fixedly connected, there is a gap between the outer wall surfaces of every two adjacent rear end heat exchange tubes, and the outer wall surface of each rear end heat exchange tube and the inner wall surface of the mounting frame c together form a hot fluid channel c.

[0023] Furthermore, the exhaust duct assembly is an L-shaped structure; one part of the L-shaped structure is fixedly connected to the rear end opening end of the shell; another part of the L-shaped structure is fixedly connected to the outer wall surface of the shell, and the other part is arranged along the length direction of the shell;

[0024] The smoke exhaust pipe is processed on another portion of the smoke exhaust duct assembly arranged along the length direction of the shell.

[0025] Furthermore, each heat exchange plate is formed by stamping two corrugated heat exchange plates at one time, and a plurality of cold fluid channels a are formed.

[0026] Beneficial effects:

[0027] (1) The utility model discloses a tube sheet combined high-efficiency heat exchange device, comprising: a shell, a heat exchange core assembly, a front end heat exchange tube assembly, a rear end heat exchange tube assembly and a smoke exhaust duct assembly; the heat exchange device uses a tube sheet combination of a heat exchange plate and a heat exchange tube to realize heat exchange between a cold fluid and a hot fluid. The contact area between the cold fluid and the hot fluid can be further increased through the tube sheet combination, thereby further improving the heat exchange efficiency.

[0028] (2) The utility model is a tube sheet combined with a high-efficiency heat exchange device, in which the cold fluid channels a on every two adjacent heat exchange plates are staggered, so that there is a gap between every two adjacent heat exchange plates, so that the heat exchange device can increase the contact area between the cold fluid and the hot fluid, thereby improving the heat exchange efficiency.

[0029] (3) The utility model is a tube sheet combined with a high-efficiency heat exchange device, in which the mounting frame a is welded to the inner wall surface of the shell through the eight supporting protrusions. The supporting protrusions can reduce the impact force of the cold fluid on the mounting frame a to reduce displacement, damage, etc., so that the mounting frame a can be stably supported on the inner wall surface of the shell.

[0030] (4) The utility model is a tube sheet combined with a high-efficiency heat exchange device, each of the supporting protrusions is processed with a plurality of semicircular notches, and the cold fluid entering the shell can flow into the heat exchange core assembly and the rear end heat exchange tube assembly through the semicircular notches.

[0031] (5) The utility model is a tube sheet combined with a high-efficiency heat exchange device, wherein the mounting frame b is a quadrangular pyramid structure with openings at both ends, and a plurality of through holes c are arranged in a conical shape from narrow to wide along the direction from the narrow end to the wide end, and the through holes d are opposite to the through holes c one by one. The conical arrangement is used to guide the flow of the hot fluid, so that the cold fluid in the cold fluid cavity can be heated evenly, thereby improving the heat exchange efficiency.

[0032] (6) The utility model is a tube sheet combined with a high-efficiency heat exchange device, wherein the mounting frame c is a quadrangular pyramid structure with openings at both ends, and a plurality of through holes e are arranged in a conical shape from wide to narrow along the direction from the wide end to the narrow end, and the through holes f are opposite to the through holes e one by one. The conical arrangement serves to guide the flow of micro-thermal fluid, so that the hot fluid can smoothly enter the smoke exhaust duct assembly.

[0033] (7) The utility model is a tube sheet combined with a high-efficiency heat exchange device, in which one part of the smoke exhaust duct assembly is fixedly connected to the rear end opening end of the shell, and another part of the smoke exhaust duct assembly is fixedly connected to the outer wall surface of the shell, and the other part is arranged along the length direction of the shell. When the hot fluid passes through the horizontal part of the smoke exhaust duct assembly, the waste heat of the hot fluid can be used to exchange heat with the cold fluid in the shell again, so that the heat of the hot fluid can be fully utilized and heat loss can be reduced.

[0034] (8) The utility model is a tube sheet combined with a high-efficiency heat exchange device, each heat exchange plate is formed by stamping two corrugated heat exchange plates at one time, and a plurality of cold fluid channels a are formed, which can greatly improve the processing efficiency and quality of the heat exchange plate, simplify the process flow, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram (front view) of the utility model;

[0036] Figure 2 It is a structural composition diagram of the utility model (left view);

[0037] Figure 3 This is a layout diagram (top view) of the heat exchange core assembly of the utility model;

[0038] Figure 4 This is a front view of the heat exchange core assembly of the utility model;

[0039] Figure 5 This is a layout diagram (top view) of the front end heat exchange tube of the utility model;

[0040] Figure 6 This is a layout diagram (top view) of the rear end heat exchange tubes of the utility model;

[0041] Among them, 1-shell, 101-front flange, 102-rear flange, 103-water inlet pipe, 104-water outlet pipe, 2-heat exchange core assembly, 201-mounting frame a, 202-heat exchange plate, 203-support protrusion, 204-semicircular notch, 205-cold fluid channel a, 206-hot fluid channel a, 3-front end heat exchange tube assembly, 301-mounting frame b, 302-front end heat exchange tube, 303-hot fluid channel b, 4-rear end heat exchange tube assembly, 401-mounting frame c, 402-rear end heat exchange tube, 403-hot fluid channel c, 5-exhaust duct assembly, 501-exhaust pipe. DETAILED DESCRIPTION

[0042] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0043] This embodiment provides a tube sheet combined with an efficient heat exchange device for realizing heat exchange between heat released by combustion in a heater combustion chamber or a hot fluid such as high-temperature flue gas and a cold fluid such as circulating water inside the heater;

[0044] like Figure 1 and Figure 2 As shown, the heat exchange device comprises: a shell 1, a heat exchange core assembly 2, a front heat exchange tube assembly 3, a rear heat exchange tube assembly 4 and a smoke exhaust duct assembly 5;

[0045] make Figure 1The horizontal direction in is the length direction of the housing 1, Figure 1 The left side is the front end of the housing 1, and the right side is the rear end of the housing 1;

[0046] The shell 1 has two openings at the front and rear ends, and a water inlet pipe 103 and a water outlet pipe 104 are processed on the shell 1 respectively; the opening end at the front end is the front opening end a, and the opening end at the rear end is the rear opening end a; a front flange 101 is processed on the front opening end a of the shell 1, and a rear flange 102 is processed on the rear opening end a; the shell 1 is fixedly connected to the combustion chamber of the heater through the front flange 101; in this embodiment, the shell 1 is welded by an upper shell and a lower shell;

[0047] The heat exchange core assembly 2 is installed inside the shell 1, and the heat exchange core assembly 2 includes: a mounting frame a201 and a plurality of heat exchange plates 202;

[0048] like Figure 3 As shown, the mounting frame a201 is a rectangular structure with two ends open, and the mounting frame a is arranged along the length direction of the shell 1; the two open ends of the mounting frame a201 are respectively the front open end b and the rear open end b, the front open end b is opposite to the front open end a of the shell 1, and the rear open end b is opposite to the rear open end a of the shell 1; the two opposite side wall surfaces of the mounting frame a are respectively processed with a plurality of through holes of the same number and equal size, and the two opposite side wall surfaces are respectively surface a and surface b, the plurality of through holes on surface a are through holes a, and the plurality of through holes on surface b are through holes The plurality of through holes are through holes b, and the through holes b are opposite to the through holes a one by one; four supporting protrusions 203 are respectively processed on the outer wall surfaces of the four side plates forming the front opening end b; another four supporting protrusions 203 are respectively processed on the outer wall surfaces of the four side plates forming the rear opening end b; the mounting frame a201 is welded to the inner wall surface of the housing 1 through the eight supporting protrusions 203, and the eight supporting protrusions 203 are used to support the mounting frame a201; each of the supporting protrusions 203 is processed with a plurality of semicircular notches 204;

[0049] like Figure 3 As shown, each of the heat exchange plates 202 is corrugated; Figure 4 As shown, a plurality of cold fluid channels a205 with openings at both ends are processed inside each heat exchange plate 202, and every two adjacent cold fluid channels a205 are equidistant and parallel to each other; the openings on the same end of all cold fluid channels a205 are interconnected to form one open end of the heat exchange plate 202, and the openings on the other end of all cold fluid channels a205 are interconnected to form the other open end of the heat exchange plate 202;

[0050] The two open ends of each heat exchange plate 202 are respectively fixedly connected to the opposite through hole a and through hole b; after being fixedly connected, the cold fluid channels a205 on each two adjacent heat exchange plates 202 are staggered, so that there is a gap between the outer wall surfaces of each two adjacent heat exchange plates 202, and the outer wall surface of each heat exchange plate 202 and the inner wall surface of the mounting frame a201 jointly form a hot fluid channel a206; the inner space of each cold fluid channel a205 on each heat exchange plate 202 is connected to the inner space of the shell 1; in this embodiment, each heat exchange plate 202 is formed by stamping two corrugated heat exchange plates at one time, and a plurality of cold fluid channels a205 are formed;

[0051] like Figure 1 As shown, the front end heat exchange tube assembly 3 is installed inside the shell 1, and is located between the heat exchange core tube assembly 2 and the front opening end a of the shell 1. The front end heat exchange tube assembly 3 includes: a mounting frame b301 and a plurality of heat exchange tubes, and the heat exchange tube of the front end heat exchange tube assembly 3 is the front end heat exchange tube 302;

[0052] like Figure 5 As shown, the mounting frame b301 is a four-sided pyramid structure with openings at both ends, the narrow end of the four-sided pyramid is fixedly connected to the front opening end a of the shell 1, and the wide end is fixedly connected to the front opening end b of the heat exchange core assembly 2; the two opposite side wall surfaces of the mounting frame b301 are respectively processed with a plurality of circular through holes of the same number, so that the two opposite side wall surfaces of the mounting frame b301 are surface c and surface d, respectively, the plurality of through holes on surface c are through holes c, and the plurality of through holes on surface d are through holes d; there is a gap between every two through holes c, and the plurality of through holes c are arranged in a conical shape from narrow to wide along the direction from the narrow end to the wide end; the through holes d are opposite to the through holes c one by one;

[0053] The two ends of the front heat exchange tubes 302 are respectively welded to the corresponding through holes c and through holes d, and the internal space of each front heat exchange tube 302 is connected to the internal space of the shell 1; the internal space of each front heat exchange tube 302 serves as a cold fluid channel b; after being fixedly connected, there is a gap between the outer wall surfaces of every two adjacent front heat exchange tubes 302, and the outer wall surface of each front heat exchange tube 302 and the inner wall surface of the mounting frame b301 jointly form a hot fluid channel b303; in this embodiment, the front heat exchange tubes 302 of the front heat exchange tube assembly 3 are preferably twenty-one, and the twenty-one front heat exchange tubes 302 form a Figure 3 The structure in

[0054] like Figure 1 As shown, the rear end heat exchange tube assembly 4 is installed inside the shell 1, and is located between the rear open end b of the heat exchange core tube assembly 2 and the rear open end a of the shell 1. The rear end heat exchange group includes: a mounting frame c401 and a plurality of heat exchange tubes, and the heat exchange tube of the rear end heat exchange tube assembly (4) is the rear end heat exchange tube 402;

[0055] like Figure 6 As shown, the mounting frame c401 is a four-sided pyramid (four-sided truncated pyramid) structure with two ends open, the narrow end of the four-sided pyramid is fixedly connected to the rear open end a of the shell 1, and the wide end is fixedly connected to the rear open end b of the heat exchange core assembly 2; the two opposite side wall surfaces of the mounting frame c401 are respectively processed with a plurality of circular through holes of the same number, so that the two opposite side wall surfaces of the mounting frame c401 are surface e and surface f, respectively, the plurality of through holes on surface e are through holes e, and the plurality of through holes on surface f are through holes f; the plurality of through holes e are arranged in a cone shape from wide to narrow along the direction from the wide end to the narrow end; the through holes f are opposite to the through holes e one by one;

[0056] The two ends of the plurality of rear heat exchange tubes 402 are respectively welded to the corresponding through holes e and through holes f, and the internal space of each rear heat exchange tube 402 is connected to the internal space of the shell 1; the internal space of each front and rear heat exchange tube 402 is a cold fluid channel c; after being fixedly connected, there is a gap between the outer wall surfaces of each two adjacent rear heat exchange tubes 402, and the outer wall surface of each rear heat exchange tube 402 and the back side of the mounting frame c401 together form a hot fluid channel c403; in this embodiment, the rear heat exchange tubes 402 of the rear heat exchange tube assembly 4 are preferably fourteen, and the fourteen rear heat exchange tubes 402 form a Figure 5 The structure in

[0057] After the front heat exchange tube assembly 3, the heat exchange core assembly 2 and the rear heat exchange tube assembly 4 are installed, the hot fluid channel a206 of the front heat exchange tube assembly 3, the hot fluid channel b303 of the heat exchange core assembly 2 and the hot fluid channel c403 of the rear heat exchange tube assembly 4 together form a hot fluid cavity that is narrow at both ends and wide in the middle; each cold fluid channel b of the front heat exchange tube assembly 3, each cold fluid channel a205 of the heat exchange core assembly 2, each cold fluid channel c of the rear heat exchange tube assembly 4 and the internal space of the shell together form a cold fluid cavity; the cold fluid cavity is connected to the water inlet pipe 103 and the water outlet pipe 104; the hot fluid cavity is used for the flow of hot fluid, and the cold fluid cavity is used for the flow of cold fluid;

[0058] like Figure 1 As shown, the exhaust duct assembly 5 is an L-shaped structure; one part of the L-shaped structure is fixedly connected to the rear flange 102 of the rear opening end a of the shell 1; the other part of the L-shaped structure is fixedly connected to the outer wall surface of the shell 1, and the other part is arranged along the length direction of the shell 1; the internal space of the exhaust duct assembly 5 is communicated with the hot fluid cavity; the exhaust duct assembly 5 is processed with an exhaust pipe 501, and the exhaust pipe 501 is located on the other part of the L-shaped structure;

[0059] In this embodiment, the inner diameter of each front-end heat exchange tube 302 and each rear-end heat exchange tube 402 is 16 mm, and each front-end heat exchange tube 302 and each rear-end heat exchange tube 402 are preferably stainless steel tubes.

[0060] Working principle:

[0061] The cold fluid enters the housing 1 through the water inlet pipe 103, and flows along the inner wall of the housing 1 into the bottom of the housing 1 (i.e. Figure 1 After that, the cold fluid flows from bottom to top along the inner wall of the cold fluid channel b of the front heat exchange tube assembly 3, the cold fluid channel a205 of the heat exchange core assembly 2, and the cold fluid channel c of the rear heat exchange tube assembly 4 to the top of the shell 1, and finally flows out from the outlet pipe 104; the several semicircular notches 204 on the supporting protrusion 203 of the heat exchange core assembly 2 are used for the cold fluid to flow into the internal space of the entire shell 1;

[0062] The hot fluid in the combustion chamber flows into the hot fluid cavity from the front opening end a of the shell 1, and flows into the exhaust duct assembly 5 through the hot fluid channel a206 of the front heat exchange tube assembly 3, the hot fluid channel b303 of the heat exchange core assembly 2, and the hot fluid channel c403 of the rear heat exchange tube assembly 4 in sequence, and is finally discharged from the exhaust pipe 501; since the fluid channel a is narrow at both ends and wide in the middle, it can guide the hot fluid;

[0063] When the hot fluid passes through the hot fluid channel a206 of the front heat exchange tube assembly 3, the hot fluid exchanges heat with the cold fluid in the cold fluid channel b of the front heat exchange tube assembly 3; since there is a gap between every two front heat exchange tubes 302, the contact surface between the hot fluid and the cold fluid can be increased, thereby improving the heat exchange efficiency;

[0064] When the hot fluid passes through the hot fluid channel b303 of the heat exchange core assembly 2, the hot fluid exchanges heat with the cold fluid in the cold fluid channel a205 of the heat exchange plate 202 of the heat exchange core assembly 2; since there is a gap between every two cold fluid channels a205, the contact surface between the hot fluid and the cold fluid can be increased, thereby improving the heat exchange efficiency;

[0065] When the hot fluid passes through the hot fluid channel c403 of the rear heat exchange tube assembly 4, the hot fluid exchanges heat with the cold fluid in the cold fluid channel c of the rear heat exchange tube assembly 4; since there is a gap between every two rear heat exchange tubes 402, the contact surface between the hot fluid and the cold fluid can be increased, thereby improving the heat exchange efficiency;

[0066] When the hot fluid flows into the horizontal portion of the smoke exhaust duct assembly 5 after passing through the hot fluid cavity, it can exchange heat with the cold fluid in the cold fluid cavity again through preheating of the hot fluid;

[0067] In this embodiment, the heat exchange device uses heat exchange tubes and heat exchange plates 202 to achieve heat transfer between the cold fluid and the hot fluid, which can improve the heat exchange efficiency of the hot fluid to the cold fluid. At the same time, the structure of the smoke exhaust duct assembly 5 can make the hot fluid that has been exhausted continue to exchange heat with the cold fluid in the cold fluid cavity (that is, continue to use the residual heat of the hot fluid to heat the cold fluid), which can further improve the heat exchange efficiency and improve the utilization rate of the hot fluid.

[0068] Compared with the existing heat exchange device, the heat exchange device in this embodiment can double the heat exchange area, the heat exchange efficiency can reach 93%, and the exhaust gas temperature is only about 50°C, which can greatly improve the effective utilization of heat and achieve the purpose of environmental protection.

[0069] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tube sheet combined high efficiency heat exchange device, characterized in that: The heat exchange device includes: a shell, a heat exchange core assembly, a front heat exchange tube assembly, a rear heat exchange tube assembly and a smoke exhaust duct assembly; The front and rear ends of the shell are open, and a water inlet pipe and a water outlet pipe are processed on the shell respectively; The front heat exchange tube assembly, the heat exchange core assembly and the rear heat exchange tube assembly are sequentially connected and installed inside the shell; the front heat exchange tube assembly includes: a cold fluid channel b and a hot fluid channel b formed by a plurality of heat exchange tubes, the heat exchange core assembly includes: a cold fluid channel a and a hot fluid channel a formed by a plurality of heat exchange plates, and the rear heat exchange tube assembly includes: a cold fluid channel c and a hot fluid channel c formed by a plurality of heat exchange tubes; The hot fluid channel a, the hot fluid channel b and the hot fluid channel c together form a hot fluid cavity; the cold fluid channel b, the cold fluid channel a, the cold fluid channel c and the inner space of the shell together form a cold fluid cavity, and the cold fluid cavity is respectively connected to the water inlet pipe and the water outlet pipe; The front opening end of the shell is fixedly connected to the combustion chamber of the heater, and the combustion chamber is communicated with one end of the hot fluid cavity; the smoke exhaust duct assembly is fixedly connected to the rear opening end of the shell, and the internal space of the smoke exhaust duct assembly is communicated with the other end of the hot fluid cavity; the bottom edge of the smoke exhaust duct assembly is processed with a smoke exhaust pipe.

2. A tube sheet combined high efficiency heat exchange device as claimed in claim 1, characterized in that: The heat exchange core assembly also includes: a mounting frame a; The mounting frame a is a rectangular structure with two ends open, and the mounting frame a is arranged along the length direction of the shell; the two open ends of the mounting frame a are respectively the front open end b and the rear open end b, the front open end b is opposite to the front open end of the shell, and the rear open end b is opposite to the rear open end of the shell; the two opposite side wall surfaces of the mounting frame a are respectively processed with a plurality of through holes of the same number and size, and the two opposite side wall surfaces are respectively surface a and surface b, the plurality of through holes on surface a are through holes a, the plurality of through holes on surface b are through holes b, and the through holes b are opposite to the through holes a one by one; Each of the heat exchange plates is corrugated; a plurality of cold fluid channels a with openings at both ends are processed inside each heat exchange plate, and each two adjacent cold fluid channels a are equidistant and parallel to each other; the openings on the same end of all the cold fluid channels a are interconnected to form an open end of the heat exchange plate, and the openings on the other end of all the cold fluid channels a are interconnected to form another open end of the heat exchange plate; The two open ends of each heat exchange plate are respectively fixedly connected to the opposite through hole a and through hole b; after being fixedly connected, the cold fluid channels a on every two adjacent heat exchange plates are staggered, so that there is a gap between the outer wall surfaces of every two adjacent heat exchange plates, and the outer wall surface of each heat exchange plate and the inner wall surface of the mounting frame a jointly form a hot fluid channel a; the internal space of each cold fluid channel a on each heat exchange plate is communicated with the internal space of the shell.

3. A tube sheet combined high efficiency heat exchange device as claimed in claim 2, characterized in that: Four supporting protrusions are respectively processed on the outer wall surfaces of the four side panels forming the front opening end b, and another four supporting protrusions are respectively processed on the outer wall surfaces of the four side panels forming the rear opening end b; the mounting frame a is welded to the inner wall surface of the outer shell through the eight supporting protrusions.

4. A tube sheet combined high efficiency heat exchange device as claimed in claim 3, characterized in that: A plurality of semicircular notches are processed on each of the supporting protrusions.

5. The tube sheet combined high efficiency heat exchange device as claimed in claim 2, characterized in that: The front end heat exchange tube assembly further comprises: a mounting frame b, which makes the heat exchange tube of the front end heat exchange tube assembly the front end heat exchange tube; The mounting frame b is a four-sided pyramid structure with openings at both ends, the narrow end of the four-sided pyramid is fixedly connected to the front opening end of the shell, and the wide end is fixedly connected to the front opening end b of the heat exchange core assembly; the two opposite side wall surfaces of the mounting frame b are respectively processed with a plurality of circular through holes of the same number, so that the two opposite side wall surfaces of the mounting frame b are surface c and surface d, respectively, the plurality of through holes on surface c are through holes c, and the plurality of through holes on surface d are through holes d; and the plurality of through holes c are arranged in a conical shape from narrow to wide along the direction from the narrow end to the wide end; the through holes d are opposite to the through holes c one by one; The two ends of the front-end heat exchange tubes are respectively welded to the corresponding through holes c and through holes d, and the internal space of each front-end heat exchange tube is connected with the internal space of the shell; the internal space of each front-end heat exchange tube serves as a cold fluid channel b; after being fixedly connected, there is a gap between the outer wall surfaces of every two adjacent front-end heat exchange tubes; the outer wall surface of each front-end heat exchange tube and the inner wall surface of the mounting frame b jointly form a hot fluid channel b.

6. The tube sheet combined high efficiency heat exchange device as claimed in claim 2, characterized in that: The rear heat exchange group further includes: a mounting frame c, which makes the heat exchange tubes of the rear heat exchange tube assembly the rear heat exchange tubes; The mounting frame c is a four-sided pyramid structure with openings at both ends, the narrow end of the four-sided pyramid is fixedly connected to the rear opening end of the shell, and the wide end is fixedly connected to the rear opening end b of the heat exchange core assembly; the two opposite side wall surfaces of the mounting frame c are respectively processed with a plurality of circular through holes of the same number, so that the two opposite side wall surfaces of the mounting frame c are surface e and surface f, respectively, the plurality of through holes on surface e are through holes e, and the plurality of through holes on surface f are through holes f; the plurality of through holes e are arranged in a tapered shape from wide to narrow along the direction from the wide end to the narrow end; the through holes f are opposite to the through holes e one by one; The two ends of the plurality of rear end heat exchange tubes are respectively welded to the corresponding through holes e and through holes f, and the internal space of each rear end heat exchange tube is connected to the internal space of the shell; the internal space of each front and rear end heat exchange tube is a cold fluid channel c; after being fixedly connected, there is a gap between the outer wall surfaces of every two adjacent rear end heat exchange tubes, and the outer wall surface of each rear end heat exchange tube and the inner wall surface of the mounting frame c together form a hot fluid channel c.

7. The tube sheet combined high efficiency heat exchange device according to claim 1, characterized in that: The smoke exhaust duct assembly is an L-shaped structure; one part of the L-shaped structure is fixedly connected to the rear end opening of the shell; another part of the L-shaped structure is fixedly connected to the outer wall surface of the shell, and the other part is arranged along the length direction of the shell; The smoke exhaust pipe is processed on another portion of the smoke exhaust duct assembly arranged along the length direction of the shell.

8. A tube sheet combined high efficiency heat exchange device as claimed in any one of claims 1 to 7, characterized in that: Each heat exchange plate is formed by stamping two corrugated heat exchange plates at one time, and a plurality of cold fluid channels a are formed.

Images