Enamel vacuum plate type heat exchange device

Abstract

The invention belongs to the technical field of heat exchange devices, and particularly relates to an enamel vacuum plate type heat exchange device which comprises a vacuum heat exchange plate set arranged in a heating unit and parallel to the flowing direction of a heating medium; the anti-abrasion assembly is fixedly arranged at the end, facing the incoming flow of the heating medium, of the vacuum heat exchange plate set; the condensation pipes fixedly communicate with the top end of the vacuum heat exchange plate set and are located outside the heating unit; the refrigerant assembly is arranged on the outer side of the condensation pipe; and the condensate water isolation assembly is arranged on the condensation pipe, and the condensate water isolation assembly is located between the vacuum heat exchange plate set and the refrigerant assembly. The problems of surface ash deposition, abrasion and corrosion of an existing flue gas waste heat recovery device of the coal-fired unit are solved, and the heat exchange efficiency and stability of the heat exchange device are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of heat exchange devices, and particularly relates to a cast enamel vacuum plate type heat exchange device. BACKGROUND

[0002] Heat exchange devices are needed in light and heat generating units, geothermal power generating units, steel smelting, and cooling stations, etc. for recycling waste heat.

[0003] At present, there are mainly two forms of waste heat recovery devices in the industry. One is a serpentine finned tube type heat exchanger, which strengthens heat exchange by circulating condensate water inside and setting spiral fins outside. However, this structure has inherent defects: when the pipe body leaks due to corrosion or wear, the condensate water will directly enter the heating unit, causing soot to be formed, which seriously threatens the safe operation of environmental protection facilities such as the dust remover at the back end; at the same time, the finned tube leeward surface is prone to soot deposition, which not only reduces the heat exchange efficiency, but also increases the gas flow resistance. The second is a heat pipe type heat exchanger, which relies on the phase change of the internal working medium to transfer heat. Although it avoids the risk of water leakage into the heating unit, the heat pipe also adopts a fin structure, which is prone to soot deposition in high-dust gas; and the heat pipe is mostly made of carbon steel, which lacks protection on the surface, and when the gas temperature decreases below the acid dew point, the acidic condensate produced will cause serious corrosion to the pipe wall, affecting the service life of the equipment; in addition, the arrangement of the heat pipe is prone to gas flow dead angles, and the heat exchange efficiency needs to be improved, and it is difficult to adapt to the soot deposition risk caused by frequent load fluctuations in deep peak shaving conditions.

[0004] In summary, the existing waste heat recovery devices generally face multiple problems such as soot deposition, blockage, wear, corrosion, and potential leakage when dealing with harsh gas conditions, which restricts the waste heat recovery efficiency and system operation reliability. Therefore, there is an urgent need for a cast enamel vacuum plate type heat exchange device to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a cast enamel vacuum plate type heat exchange device to solve the above problems, achieve the purpose of solving the problems of soot deposition, wear and corrosion of the existing waste heat recovery device, and improve the heat exchange efficiency and stability of the heat exchange device.

[0006] To achieve the above purpose, the present application provides the following scheme: a cast enamel vacuum plate type heat exchange device, comprising: a vacuum heat exchange plate group, arranged in a heating unit, the vacuum heat exchange plate group being parallel to the flow direction of the heat medium; a wear-resistant assembly, fixedly arranged at one end of the vacuum heat exchange plate group facing the incoming flow of the heat medium; a plurality of condensing pipes, fixedly connected at the top end of the vacuum heat exchange plate group, the condensing pipes being located outside the heating unit; a refrigerant assembly, arranged outside the condensing pipes; and a condensate water isolation assembly, arranged on the condensing pipes, the condensate water isolation assembly being located between the vacuum heat exchange plate group and the refrigerant assembly.

[0007] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0008] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0009] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0010] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0011] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0012] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0013] The enamel vacuum plate heat exchange device comprises a vacuum heat exchange plate group, a condenser pipe and a condensate isolation assembly.

[0014] The condensing pipe top end is fixedly communicated with an exhaust valve, the exhaust valve comprises a welded joint, the bottom end of the welded joint is fixedly communicated with the top end of the condensing pipe, the top end of the welded joint is threadedly connected with a pipe cap, the top wall of the pipe cap is provided with an exhaust hole, and the welded joint is internally provided with an elastic exhaust part.

[0015] The elastic exhaust part comprises a screw rod, the screw rod is threadedly connected with the top wall of the pipe cap, an adjusting nut is threadedly connected with the outer side wall of the screw rod, the adjusting nut is located on the top of the outer side of the pipe cap, the end of the screw rod located on the inner side of the welded joint is fixedly connected with a top plate, the middle of the bottom end of the top plate is fixedly connected with a spring, the bottom end of the spring is fixedly connected with a bottom plate, the inner side wall of the welded joint is provided with two steps, and the top plate and the bottom plate are adapted to the steps.

[0016] Compared with the prior art, the application has the following advantages and technical effects: the surface of the vacuum heat exchange plate is protected by the enamel coating, the heat medium does not directly contact the vacuum heat exchange plate metal, the vacuum heat exchange plate is protected from the abrasion and erosion of particles, the surface enamel coating of the vacuum heat exchange plate is high in smoothness, is not conducive to the formation of a fouling hydrophobic surface, repels dirt particles so that they cannot adhere to the surface of the enamel coating, reduces the operating resistance of the heat medium, the surface enamel coating can prevent corrosion of water, oxygen and other corrosive media, the vacuum heat exchange plate has a longer service life than the vacuum heat pipe without any treatment measures, the non-planar outer side wall of the vacuum heat exchange plate and the internal medium channel can form a turbulent flow, the working medium can flow in multiple processes, and the heat exchange efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a whole schematic diagram of the present application.

[0019] Figure 2 It is a schematic diagram of the vacuum heat exchange unit of the present application.

[0020] Figure 3 It is a schematic diagram of the vacuum heat exchange plate of the present application.

[0021] Figure 4 It is a sectional view of the vacuum heat exchange plate of the present application.

[0022] Figure 5Figure 1 is a schematic diagram of the connection between the anti-abrasion plate and the vacuum heat exchange plate of the present application.

[0023] Figure 6 Figure 2 is a schematic diagram of the water jacket of the present application.

[0024] Figure 7 Figure 3 is a schematic diagram of the exhaust valve of the present application.

[0025] Figure 8 Figure 4 is a schematic diagram of the connection between the partition plate and the condensing pipe of the present application.

[0026] Figure 9 Figure 5 is a schematic diagram of the positioning component of the present application.

[0027] In the figure, 1 is a heating unit; 2 is a partition plate; 3 is a vacuum heat exchange plate; 4 is a refrigerant tank; 5 is a refrigerant outlet; 6 is a refrigerant inlet; 7 is an exhaust valve; 8 is a working medium; 9 is a positioning hole; 10 is a first interface; 11 is a second interface; 12 is a medium channel; 13 is a laser welding point; 14 is an anti-abrasion plate; 15 is a water jacket; 16 is a welded joint; 17 is a first sealing ring; 18 is a spring; 19 is a second sealing ring; 20 is a pipe cap; 21 is an exhaust hole; 22 is a filler; 23 is a screw rod; 24 is an adjusting nut; 25 is a jacket; 26 is a condensing pipe; 27 is a positioning sleeve; 28 is a protective pad; 29 is a top plate; and 30 is a bottom plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] In order to make the above-mentioned objects, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0030] Referring to Figures 1 to 9 The present application provides a kind of enamel vacuum plate heat exchange device, including: vacuum heat exchange plate group, setting in heating unit 1, vacuum heat exchange plate group is parallel to the direction of heat medium flow;Anti-abrasion component is fixedly arranged in the end of vacuum heat exchange plate group towards heat medium flow;Several condensing pipes 26, fixedly connected in the top of vacuum heat exchange plate group, condensing pipe 26 is located in heating unit 1 outside;Refrigerant component is arranged outside condensing pipe 26;Condensed water isolation component is arranged on condensing pipe 26, and condensed water isolation component is located between vacuum heat exchange plate group and refrigerant component.

[0031] Further, the vacuum heat exchange plate group comprises a plurality of vacuum heat exchange units, the plurality of vacuum heat exchange units are arranged at intervals in an array, each vacuum heat exchange unit comprises a vacuum heat exchange plate 3, a plurality of positioning holes 9 are arranged on the vacuum heat exchange plate 3, a positioning component is arranged between two adjacent vacuum heat exchange plates 3, a condensing pipe 26 is fixedly communicated with a top wall of the vacuum heat exchange plate 3, and an anti-abrasion assembly is fixedly connected to an end of the vacuum heat exchange plate 3 facing the hot medium flow.

[0032] Further, the outer side wall of the vacuum heat exchange plate 3 is non-planar, the outer side wall of the vacuum heat exchange plate 3 is provided with an enamel coating, the vacuum heat exchange plate 3 is internally provided with a medium channel 12, the medium channel 12 is filled with a working medium 8, and the condensing pipe 26 is communicated with the medium channel 12.

[0033] The vacuum heat exchange plate 3 is integrally formed by full-automatic laser welding, two flat plates are first aligned, the two flat plates are fixed by laser welding points 13 through full-automatic non-oxidation laser welding technology, and then a hydraulic or pneumatic bulging is performed to form a wide channel bubble plate, the bubble plate surface is symmetrically expanded to two side surfaces, thereby forming the vacuum heat exchange plate 3, then the welding seams and the plate are annealed to prevent stress corrosion of the vacuum heat exchange plate 3. Then, the pipe opening and the exhaust valve 7 are welded on the top of the vacuum heat exchange plate 3 by argon arc welding, then the vacuum heat exchange plate 3 is subjected to a pressure test through the exhaust valve 7, and the pressure test pressure is greater than 1.5 times the working pressure. After the pressure test is qualified, the surface of the vacuum heat exchange plate 3 is subjected to enamel coating treatment, and the manufacturing of the vacuum heat exchange plate 3 is completed. The surface of the vacuum heat exchange plate 3 is uneven, the irregular medium channel 12 is formed inside, the turbulent flow design of the fluid inside and outside the plate, and the hot medium can be cross-flowed in multiple processes, so that the heat exchange efficiency is high; the vacuum heat exchange plate 3 is vertically arranged inside the heat generating unit 1, the change of different working conditions of the waste heat gas is adapted, the uniform passage of the gas through the vacuum heat exchange plate 3 is ensured, and the positioning hole 9 ensures the spacing accuracy of the vacuum heat exchange plate 3.

[0034] When the surface of the vacuum heat exchange plate 3 is subjected to enamel coating treatment, the oil stains, rust and oxide layers on the surface of the vacuum heat exchange plate 3 are first removed through pretreatment, then the glaze powder or slurry added with corrosion-resistant metal elements is uniformly covered on the surface of the vacuum heat exchange plate 3 through spraying, dipping, electrophoresis and the like, and finally the vacuum heat exchange plate 3 with the coated glaze is sent into a kiln for sintering at high temperature. At this time, the glaze is melted into a glass state, and is physically and chemically combined with the surface of the vacuum heat exchange plate 3, and after cooling, a hard and smooth enamel coating is formed.

[0035] Further, the positioning component comprises a positioning sleeve 27, the positioning sleeve 27 is fixedly arranged between two adjacent vacuum heat exchange plates 3, and a protective pad 28 is arranged between the positioning sleeve 27 and the vacuum heat exchange plate 3.

[0036] Further, the anti-abrasion assembly comprises an anti-abrasion plate 14, the anti-abrasion plate 14 is fixedly connected to the end of the vacuum heat exchange plate 3 facing the hot medium flow.

[0037] The solid abrasion-proof plate 14 is designed at the front end of the vacuum heat exchange plate 3 to prolong the service life of the vacuum heat exchange plate 3.

[0038] Further, the condensate isolation assembly comprises a partition plate 2 arranged on the condensing pipe 26, the partition plate 2 being located between the vacuum heat exchange plate group and the refrigerant assembly, and a jacket 25 being arranged between the partition plate 2 and the condensing pipe 26.

[0039] The partition plate 2 ensures that the condensed water does not contact the high-temperature gas after leakage.

[0040] Further, the refrigerant assembly comprises a refrigerant tank 4 arranged outside the plurality of condensing pipes 26, the refrigerant tank 4 being located above the partition plate 2, and the refrigerant tank 4 being provided with a refrigerant outlet 5 and a refrigerant inlet 6, and a serpentine refrigerant component being fixedly and communicatively connected between the refrigerant outlet 5 and the refrigerant inlet 6, the serpentine refrigerant component being sleeved on the outer sidewall of the condensing pipe 26.

[0041] Further, the serpentine refrigerant component comprises a water jacket 15 sleeved on the outer sidewall of the condensing pipe 26, and a first interface 10 and a second interface 11 being fixedly and communicatively connected to the outer sidewall of the water jacket 15, the first interface 10 and the second interface 11 being located at the top and the bottom of the water jacket 15 respectively, adjacent two water jackets 15 being communicated through the first interface 10 or the second interface 11, and the water jackets 15 located at both ends being fixedly and communicatively connected to the refrigerant outlet 5 or the refrigerant inlet 6 through the first interface 10.

[0042] Further, the condensing pipe 26 is fixedly and communicatively connected with an exhaust valve 7, the exhaust valve 7 comprising a welded joint 16, the bottom end of the welded joint 16 being fixedly and communicatively connected to the top end of the condensing pipe 26, a pipe cap 20 being threadedly connected to the top wall of the welded joint 16, an exhaust hole 21 being formed in the top wall of the pipe cap 20, and an elastic exhaust part being arranged in the welded joint 16.

[0043] Further, the elastic exhaust part comprises a screw rod 23, the screw rod 23 being threadedly connected to the top wall of the pipe cap 20, an adjusting nut 24 being threadedly connected to the outer sidewall of the screw rod 23, the adjusting nut 24 being located at the top of the outer side of the pipe cap 20, a top plate 29 being fixedly connected to the end of the screw rod 23 located in the inner side of the welded joint 16, a spring 18 being fixedly connected to the middle of the bottom end of the top plate 29, a bottom plate 30 being fixedly connected to the bottom end of the spring 18, two levels of steps being arranged on the inner sidewall of the welded joint 16, and the top plate 29 and the bottom plate 30 being adapted to the steps.

[0044] A packing 22 is arranged between the screw rod 23 and the pipe cap 20, a second sealing ring 19 is arranged between the top plate 29 and the steps, and a first sealing ring 17 is arranged between the bottom plate 30 and the steps.

[0045] By adjusting the tightness of the adjusting nut 24, the sealing effect of the first sealing ring 17 and the second sealing ring 19 is controlled. When the adjusting nut 24 is screwed down, the top plate 29 at the upper end of the spring 18 compresses the second sealing ring 19 and the spring 18 downward, and the bottom plate 30 at the other end of the spring 18 is compressed by the corresponding force, so that the first sealing ring 17 is tightly attached to the welded joint 16, forming a double sealing effect. At the same time, the pipe cap 20 is designed with a detachable threaded structure, which facilitates the replacement of the internal first sealing ring 17 and the second sealing ring 19 and the internal vacuum heat exchange plate 3.

[0046] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0047] The above-described embodiments are only preferred modes of the present application and do not limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A vacuum panel heat exchanger of the enameled type, characterized in that, The application relates to a heat generating unit, which comprises the following components: a vacuum heat exchange plate group arranged in a heat generating unit (1), wherein the vacuum heat exchange plate group is parallel to the flowing direction of a heat medium; a wear-resistant assembly fixedly arranged at one end of the vacuum heat exchange plate group facing the flow of the heat medium; a plurality of condensing pipes (26) fixedly communicated with the top end of the vacuum heat exchange plate group, wherein the condensing pipes (26) are located outside the heat generating unit (1); a refrigerant assembly arranged outside the condensing pipes (26); and a condensing water isolation assembly arranged on the condensing pipes (26) and located between the vacuum heat exchange plate group and the refrigerant assembly. The vacuum heat exchange plate group comprises a plurality of vacuum heat exchange units arranged at intervals, wherein each vacuum heat exchange unit comprises a vacuum heat exchange plate (3) provided with a plurality of positioning holes (9), a positioning component arranged between two adjacent vacuum heat exchange plates (3), a condensing pipe (26) fixedly communicated with the top wall of the vacuum heat exchange plate (3), and a wear-resistant assembly fixedly connected to the end of the vacuum heat exchange plate (3) facing the flow of the heat medium. The outer wall of the vacuum heat exchange plate (3) is a non-planar surface, the outer wall of the vacuum heat exchange plate (3) is provided with an enamel coating, the vacuum heat exchange plate (3) is internally provided with a medium channel (12) filled with a working medium (8), and the condensing pipe (26) is communicated with the medium channel (12). The positioning component comprises a positioning sleeve (27) fixedly arranged between two adjacent vacuum heat exchange plates (3), and a protective pad (28) arranged between the positioning sleeve (27) and the vacuum heat exchange plate (3). The wear-resistant assembly comprises a wear-resistant plate (14) fixedly connected to the end of the vacuum heat exchange plate (3) facing the flow of the heat medium. The condensing water isolation assembly comprises a partition plate (2) arranged on the condensing pipe (26) and located between the vacuum heat exchange plate group and the refrigerant assembly, and a jacket (25) arranged between the partition plate (2) and the condensing pipe (26).

2. A vacuum panel heat exchanger according to claim 1, characterised in that The refrigerant assembly comprises a refrigerant tank (4) arranged outside the condensing pipes (26), wherein the refrigerant tank (4) is located above the partition plate (2), and the refrigerant tank (4) is provided with a refrigerant outlet (5) and a refrigerant inlet (6) fixedly communicated with a serpentine refrigerant component, and the serpentine refrigerant component is sleeved on the outer wall of the condensing pipe (26).

3. A vacuum panel heat exchanger according to claim 2, characterised in that ​ 4. A vacuum panel heat exchanger according to claim 2, wherein ​ 5. A vacuum panel heat exchanger according to claim 2, wherein ​ 6. A vacuum panel heat exchanger according to claim 1, wherein ​ 7. A vacuum panel heat exchanger according to claim 6, characterised in that ​ 8. A vacuum panel heat exchanger according to claim 7, characterised in that The serpentine refrigerant component includes a water jacket (15) sleeved on the outer wall of the condensing pipe (26), the outer wall of the water jacket (15) is fixedly communicated with a first interface (10) and a second interface (11), the first interface (10) and the second interface (11) are located at the top and the bottom of the water jacket (15) respectively, two adjacent water jackets (15) are communicated through the first interface (10) or the second interface (11), and the water jackets (15) at both ends are fixedly communicated with the refrigerant outlet (5) or the refrigerant inlet (6) through the first interface (10).

9. The vacuum panel according to claim 1, wherein The top end of the condensing pipe (26) is fixedly communicated with an exhaust valve (7), the exhaust valve (7) includes a welded joint (16), the bottom end of the welded joint (16) is fixedly communicated with the top end of the condensing pipe (26), the top end of the welded joint (16) is threadedly connected with a pipe cap (20), the top wall of the pipe cap (20) is provided with an exhaust hole (21), and the welded joint (16) is internally provided with an elastic exhaust part.

10. A vacuum panel heat exchanger according to claim 9, wherein The elastic exhaust part includes a screw rod (23), the screw rod (23) is threadedly connected with the top wall of the pipe cap (20), the outer wall of the screw rod (23) is threadedly connected with an adjusting nut (24), the adjusting nut (24) is located at the top of the outer side of the pipe cap (20), the end portion of the screw rod (23) located in the inner side of the welded joint (16) is fixedly connected with a top plate (29), the bottom end of the top plate (29) is fixedly connected with a spring (18) at the middle portion, the bottom end of the spring (18) is fixedly connected with a bottom plate (30), the inner wall of the welded joint (16) is provided with two steps, and the top plate (29) and the bottom plate (30) are adapted to the steps.

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