Waste gas heat recovery device of glass lining sintering electric furnace

Abstract

The utility model is applicable to the field of glass lining equipment processing, and provides a glass lining sintering electric furnace waste gas heat recovery device, which comprises a recovery device main body, and a treatment assembly, a heat storage box and a heat exchange assembly which are arranged in the recovery device main body, and the treatment assembly, the heat storage box and the heat exchange assembly are all arranged in the recovery device main body; the treatment assembly comprises a treatment box, a gas inlet pipe and a gas outlet pipe, and the heat exchange assembly comprises a first heat exchange unit, a second heat exchange unit, a fluid pump and two three-way valves. Heat is absorbed through the second heat exchange unit and is released and stored in the phase change material in the heat storage box when circulating to the first heat exchange unit through fluid, waste gas of the low-temperature electric furnace is discharged through the gas outlet pipe, and the communication state of a fluid loop can be switched through the arranged fluid pump; and the high-temperature fluid in the heat exchange unit II is directly led out or the heat in the heat storage box is led out through the fluid when the exhaust gas of the electric furnace is stopped being discharged.

Description

Technical Field

[0001] This utility model belongs to the field of glass enamel equipment processing, and in particular relates to a heat recovery device for waste gas from an electric furnace for glass enamel firing. Background Technology

[0002] An electric furnace for enamel sintering is used to heat and sinter the enamel coating on metal surfaces, forming a corrosion-resistant and high-temperature-resistant protective layer. This furnace uses electric heating to ensure uniform temperature and is widely used in equipment coatings in the chemical, food, and pharmaceutical industries to improve equipment durability and safety.

[0003] In the sintering process of glass enamel, high-temperature waste gas is inevitably generated. This high-temperature waste gas is usually discharged into the atmosphere after being treated to render it harmless. However, the heat in the waste gas is dissipated through direct emission, resulting in a waste of energy and is not conducive to environmental protection. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a heat recovery device for waste gas from an electric furnace for enamel firing, which aims to solve the problems mentioned in the background art.

[0005] This utility model embodiment is implemented as follows: a heat recovery device for waste gas from an electric furnace used for enamel firing includes a recovery device body, a processing component, a heat storage box, and a heat exchange component installed within the recovery device body. The processing component, heat storage box, and heat exchange component are all installed within the recovery device body. The processing component includes a processing tank, an inlet pipe, and an outlet pipe. The outlet pipe and inlet pipe are respectively located at the upper and lower ends of the processing tank. The inlet pipe and outlet pipe penetrate the recovery device body and extend to the outside of the recovery device body. The heat storage box is installed within the recovery device body and located on one side of the processing component. The heat storage box is filled with a phase change material. The heat exchange component includes a heat exchange unit one, a heat exchange unit two, a fluid pump, and two three-way valves. The heat exchange unit one, heat exchange unit two, fluid pump, and three-way valves are connected to form a fluid circulation loop. The three-way valves include a control valve one and a control valve two. A discharge pipe one is connected to the side of control valve one, and a discharge pipe two is connected to the side of control valve two. The discharge pipe one and discharge pipe two penetrate the recovery device body and extend to the outside of the recovery device body.

[0006] As a further embodiment of this utility model: the main body of the recycling device includes an outer shell and an insulation layer, the insulation layer is fixedly installed on the inner wall of the outer shell, and the cavity inside the insulation layer forms an installation cavity.

[0007] As a further embodiment of this utility model, a dust removal unit is also provided on the air intake pipe.

[0008] As a further embodiment of this utility model: the heat exchange unit 1 includes a heat exchange tube 1, multiple heat exchange plates 1 and a collection pipe 1. The heat exchange tube 1 is composed of multiple pipes bent into an "S" shape and arranged at equal intervals. Multiple heat exchange plates 1 are fixedly installed on the outside of the heat exchange tube 1. The collection pipe 1 includes a connecting pipe 1 and a connecting pipe 2. The connecting pipe 1 and the connecting pipe 2 are respectively installed at both ends of the heat exchange tube 1.

[0009] As a further embodiment of this utility model: the heat exchange unit 2 includes a heat exchange tube 2, multiple heat exchange plates 2 and a collection pipe 2. The heat exchange tube 2 is composed of multiple pipes bent into an "S" shape and arranged at equal intervals. Multiple heat exchange plates 2 are fixedly installed on the outside of the heat exchange tube 2. The collection pipe 2 includes a connecting pipe 3 and a connecting pipe 4. The connecting pipe 3 and the connecting pipe 4 are respectively installed at both ends of the heat exchange tube 2.

[0010] As a further embodiment of this utility model: the first and second collection pipes are arranged opposite to each other, the end of the first connecting pipe is connected to a fluid pump, the fluid pump is connected to a control valve, the control valve is connected to a third connecting pipe, and the ends of the second and fourth connecting pipes are fixedly connected through the second control valve.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. The present invention provides a heat recovery device for exhaust gas from an electric furnace used for enamel firing. High-temperature exhaust gas from the electric furnace is discharged into the processing component through an inlet pipe. The heat is absorbed by the heat exchange unit two and released and stored in the phase change material in the heat storage box when the fluid circulates to the heat exchange unit one. Low-temperature exhaust gas from the electric furnace is discharged through an outlet pipe. The connection state of the fluid circuit can be switched by a fluid pump, so that the high-temperature fluid in the heat exchange unit two can be directly discharged or the heat in the heat storage box can be discharged through the fluid when the exhaust gas from the electric furnace is stopped.

[0013] 2. The heat recovery device for exhaust gas from an electric furnace for enamel firing provided in this utility model embodiment can achieve a preliminary heat preservation effect through the set insulation layer, and a reserved installation cavity is reserved for installing the processing components, heat storage box and heat exchange components. After installation, the installation cavity is filled with heat-insulating foam material to prevent the processing components and heat storage box from indirectly exchanging heat through the air in the installation cavity.

[0014] 3. The present invention provides a heat recovery device for exhaust gas from an electric furnace for firing glass, which uses a dust removal unit to remove dust from the exhaust gas introduced into the inlet pipe, thereby preventing dust in the exhaust gas from adhering to the surface of the heat exchange unit and affecting temperature conduction.

[0015] 4. The heat recovery device for exhaust gas from an electric furnace for enamel firing provided in this embodiment of the present invention improves the heat conduction time by setting up an "S"-shaped coil heat exchange tube one and a heat exchange tube two, and improves the heat conduction effect by cooperating with heat exchange plate one and heat exchange plate two, thereby improving the heat recovery rate of the exhaust gas from the electric furnace. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a heat recovery device for exhaust gas from an electric furnace for enamel firing, provided for an embodiment of this utility model;

[0017] Figure 2 A partial cross-sectional view of a heat recovery device for exhaust gas from an electric furnace used for firing glass enamel is provided in this embodiment of the present invention.

[0018] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 This is a three-dimensional structural diagram of a heat exchange component of a heat recovery device for exhaust gas from an electric furnace used for enamel firing, provided as an embodiment of the present invention.

[0020] In the attached diagram: 1. Main body of the recovery device; 11. Outer shell; 12. Insulation layer; 13. Installation cavity; 2. Processing component; 21. Processing box; 22. Inlet pipe; 23. Outlet pipe; 24. Dust removal unit; 3. Heat storage box; 4. Heat exchange component; 41. Heat exchange unit 1; 411. Heat exchange tube 1; 412. Heat exchange plate 1; 413. Combining pipe 1; 4131. Connecting pipe 2; 4132. Heat exchange unit 2; 421. Heat exchange tube 2; 422. Combining pipe 2; 423. Connecting pipe 3; 4231. Connecting pipe 4; 4232. Fluid pump; 43. Three-way valve; 44. Control valve 1; 441. Control valve 2; 442. Outlet pipe 1; 45. Outlet pipe 2; 46. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] like Figures 1 to 4As shown in the figure, an embodiment of the present invention provides a heat recovery device for waste gas from an electric furnace used for enamel firing. The device includes a main body 1, a processing component 2, a heat storage box 3, and a heat exchange component 4 installed within the main body 1. The processing component 2, heat storage box 3, and heat exchange component 4 are all installed within the main body 1. The processing component 2 includes a processing tank 21, an inlet pipe 22, and an outlet pipe 23. The outlet pipe 23 and the inlet pipe 22 are respectively located at the upper and lower ends of the processing tank 21. The inlet pipe 22 and the outlet pipe 23 penetrate the main body 1 and extend to the outside of the main body 1. The heat storage box 3 is installed within the main body 1. The heat storage tank 3 is filled with phase change material and located inside the body 1 and on one side of the processing component 2. The heat exchange component 4 includes a heat exchange unit 1 41, a heat exchange unit 2 42, a fluid pump 43 and two three-way valves 44. The heat exchange unit 1 41, the heat exchange unit 2 42, the fluid pump 43 and the three-way valves 44 are connected to form a fluid circulation loop. The three-way valves 44 include a control valve 1 441 and a control valve 2 442. The control valve 1 441 is connected to a discharge pipe 1 45 on its side, and the control valve 2 442 is connected to a discharge pipe 2 46 on its side. The discharge pipe 1 45 and the discharge pipe 2 46 penetrate the body 1 of the recovery device and extend to the outside of the body 1 of the recovery device.

[0024] In one embodiment of this utility model, high-temperature electric furnace exhaust gas is discharged into the processing component 2 through the air inlet pipe 22. The heat is absorbed by the heat exchange unit 2 42 and released and stored in the phase change material in the heat storage box 3 when it is circulated through the fluid to the heat exchange unit 1 41. Low-temperature electric furnace exhaust gas is discharged through the air outlet pipe 23. The connection state of the fluid circuit can be switched by the fluid pump 43, so that the high-temperature fluid in the heat exchange unit 2 42 can be directly exported or the heat in the heat storage box 3 can be exported through the fluid when the electric furnace exhaust gas is stopped.

[0025] like Figure 2 and Figure 3 As shown, in another embodiment of the present invention, the main body 1 of the recycling device includes an outer shell 11 and an insulation layer 12. The insulation layer 12 is fixedly installed on the inner wall of the outer shell 11, and the cavity inside the insulation layer 12 forms an installation cavity 13.

[0026] In one embodiment of this utility model, the insulation layer 12 can provide initial insulation for the device, and the installation cavity 13 is reserved for installing the processing component 2, the heat storage box 3 and the heat exchange component 4. After installation, the installation cavity 13 is filled with insulation foam material to prevent the processing component 2 and the heat storage box 3 from indirectly exchanging heat through the air in the installation cavity 13.

[0027] like Figure 1 and Figure 2 As shown, in another embodiment of the present invention, a dust removal unit 24 is also provided on the air intake pipe 22.

[0028] In one embodiment of this utility model, the dust removal unit 24 is provided to remove dust from the electric furnace exhaust gas introduced into the air inlet pipe 22, so as to prevent the dust in the electric furnace exhaust gas from adhering to the surface of the heat exchange unit 42 and affecting the temperature conduction.

[0029] like Figure 2 and Figure 4 As shown, in another embodiment of the present invention, the heat exchange unit 41 includes a heat exchange tube 411, a plurality of heat exchange plates 412 and a manifold 413. The heat exchange tube 411 is composed of a plurality of pipes bent into an "S" shape and arranged at equal intervals. The plurality of heat exchange plates 412 are fixedly installed on the outside of the heat exchange tube 411. The manifold 413 includes a connecting pipe 4131 and a connecting pipe 4132. The connecting pipe 4131 and the connecting pipe 4132 are respectively installed at both ends of the heat exchange tube 411.

[0030] Specifically, the second heat exchange unit 42 includes a second heat exchange tube 421, multiple second heat exchange plates 422, and a second manifold 423. The second heat exchange tube 421 is composed of multiple pipes bent into an "S" shape and arranged at equal intervals. The multiple second heat exchange plates 422 are fixedly installed on the outside of the second heat exchange tube 421. The second manifold 423 includes a third connecting pipe 4231 and a fourth connecting pipe 4232, which are respectively installed at both ends of the second heat exchange tube 421.

[0031] In one embodiment of this utility model, the heat conduction time is increased by setting an "S"-shaped coil heat exchange tube 411 and a heat exchange tube 421, and the heat conduction effect is improved by cooperating with a heat exchange plate 412 and a heat exchange plate 422, thereby improving the heat recovery rate of the electric furnace exhaust gas.

[0032] like Figure 2 and Figure 3 As shown, in another embodiment of this utility model, the first collection pipe 413 and the second collection pipe 423 are arranged opposite to each other, the end of the first connecting pipe 4131 is connected to the fluid pump 43, the fluid pump 43 is connected to the first control valve 441, the first control valve 441 is connected to the third connecting pipe 4231, and the ends of the second connecting pipe 4132 and the fourth connecting pipe 4232 are fixedly connected by the second control valve 442.

[0033] In one embodiment of this utility model, by connecting the first collection pipe 413 and the second collection pipe 423 with the fluid pump 43 and the three-way valve 44, the first heat exchange unit 41, the second heat exchange unit 42, the fluid pump 43 and the three-way valve 44 can be connected to form a fluid circulation loop, thereby recovering the heat of the electric furnace exhaust gas.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat recovery device for exhaust gas from an electric furnace used for enamel firing, comprising a main body (1), a processing component (2) installed within the main body (1), a heat storage box (3), and a heat exchange component (4), characterized in that, The processing component (2), the heat storage tank (3), and the heat exchange component (4) are all installed inside the main body (1) of the recovery device. The processing component (2) includes a processing tank (21), an inlet pipe (22), and an outlet pipe (23). The outlet pipe (23) and the inlet pipe (22) are respectively located at the upper and lower ends of the processing tank (21). The inlet pipe (22) and the outlet pipe (23) respectively penetrate the main body (1) of the recovery device and extend to the outside of the main body (1). The heat storage tank (3) is installed inside the main body (1) of the recovery device and is located on one side of the processing component (2). The heat storage tank (3) is filled with phase change material. The heat exchange component (4) It includes a heat exchange unit 1 (41), a heat exchange unit 2 (42), a fluid pump (43) and two three-way valves (44). The heat exchange unit 1 (41), the heat exchange unit 2 (42), the fluid pump (43) and the three-way valves (44) are connected to form a fluid circulation loop. The three-way valves (44) include a control valve 1 (441) and a control valve 2 (442). The control valve 1 (441) is connected to a discharge pipe 1 (45) on its side, and the control valve 2 (442) is connected to a discharge pipe 2 (46) on its side. The discharge pipe 1 (45) and the discharge pipe 2 (46) penetrate the main body (1) of the recovery device and extend to the outside of the main body (1) of the recovery device.

2. The heat recovery device for exhaust gas from an electric furnace for enameling as described in claim 1, characterized in that, The main body (1) of the recycling device includes an outer shell (11) and an insulation layer (12). The insulation layer (12) is fixedly installed on the inner wall of the outer shell (11), and the cavity inside the insulation layer (12) forms an installation cavity (13).

3. The heat recovery device for exhaust gas from an electric furnace for enameling as described in claim 2, characterized in that, The air intake pipe (22) is also equipped with a dust removal unit (24).

4. The heat recovery device for exhaust gas from an electric furnace for enameling as described in claim 1, characterized in that, The heat exchange unit 1 (41) includes a heat exchange tube 1 (411), multiple heat exchange plates 1 (412) and a manifold 1 (413). The heat exchange tube 1 (411) is composed of multiple pipes bent into an "S" shape and arranged at equal intervals. Multiple heat exchange plates 1 (412) are fixedly installed on the outside of the heat exchange tube 1 (411). The manifold 1 (413) includes a connecting pipe 1 (4131) and a connecting pipe 2 (4132). The connecting pipe 1 (4131) and the connecting pipe 2 (4132) are respectively installed at both ends of the heat exchange tube 1 (411).

5. The heat recovery device for exhaust gas from an electric furnace for enameling as described in claim 4, characterized in that, The second heat exchange unit (42) includes a second heat exchange tube (421), multiple second heat exchange plates (422) and a second manifold (423). The second heat exchange tube (421) is composed of multiple pipes bent into an "S" shape and arranged at equal intervals. Multiple second heat exchange plates (422) are fixedly installed on the outside of the second heat exchange tube (421). The second manifold (423) includes a third connecting pipe (4231) and a fourth connecting pipe (4232). The third connecting pipe (4231) and the fourth connecting pipe (4232) are respectively installed at both ends of the second heat exchange tube (421).

6. The heat recovery device for exhaust gas from an electric furnace for enameling as described in claim 5, characterized in that, The first collection pipe (413) and the second collection pipe (423) are arranged opposite to each other. The end of the first connecting pipe (4131) is connected to the fluid pump (43). The fluid pump (43) is connected to the first control valve (441). The first control valve (441) is connected to the third connecting pipe (4231). The ends of the second connecting pipe (4132) and the fourth connecting pipe (4232) are fixedly connected through the second control valve (442).

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