Box-type resistance furnace with waste heat recovery

Abstract

The utility model provides a kind of box resistance furnace with waste heat recovery, it is related to box resistance furnace technical field, comprising: box resistance furnace main body, hearth, furnace door, observation window and waste heat recovery component, hearth is equipped in box resistance furnace main body, hearth outside is connected with furnace door by hinged rotation, observation window is installed on furnace door, box resistance furnace main body bottom is equipped with waste heat recovery component, for the waste heat inside box resistance furnace main body is recycled, waste heat recovery component includes: waste heat recovery tank, heat conducting copper pipe, water inlet pipe, sealing cover and base.This kind of box resistance furnace with waste heat recovery can be compensated by waste heat recovery component in hearth, so that hearth inside can be rapidly heated, shorten heating duration, reduce the loss of electric energy.

Description

Technical Field

[0001] This utility model relates to the field of box-type resistance furnace technology, specifically a box-type resistance furnace with waste heat recovery. Background Technology

[0002] Box-type resistance furnaces, also known as muffle furnaces, are electric heating devices that use electric current to generate heat through resistance heating elements and heat, heat treat, or sinter materials within a closed box-shaped furnace chamber. The "box-type" in their name refers to the fact that their furnace chamber is typically a square or rectangular box structure. Due to their simple structure, convenient operation, and precise temperature control, box-type resistance furnaces play an indispensable role in many industries, including materials science, metallurgical engineering, chemical engineering, and electronics, thanks to their wide applicability and flexibility. They are a very important tool in both basic research and actual production.

[0003] When the furnace door of an existing box-type resistance furnace is opened for material handling, heat inside the furnace will dissipate outwards, resulting in heat loss and waste. After the furnace door is closed again for reheating, the temperature inside the furnace will be lower due to heat loss, which will lead to a longer heating time and increase energy consumption. Utility Model Content

[0004] The present invention addresses the shortcomings of the prior art by providing a box-type resistance furnace with waste heat recovery. This solves the problem that in existing box-type resistance furnaces, heat is dissipated from the furnace chamber during material handling and unloading, resulting in heat loss and waste. After the furnace door is closed again for reheating, the temperature inside the furnace chamber is lower due to heat loss, leading to a longer heating time and increased energy consumption.

[0005] Specifically, the waste heat recovery components can provide thermal compensation inside the furnace, enabling the furnace to heat up quickly, shortening the heating time and reducing energy consumption.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution: A box-type resistance furnace with waste heat recovery includes: a box-type resistance furnace body, a furnace chamber, a furnace door, an observation window, and a waste heat recovery assembly. The furnace chamber is located inside the box-type resistance furnace body, and the furnace door is rotatably connected to the outside of the furnace chamber via a hinge. An observation window is installed on the furnace door. The waste heat recovery assembly is located at the bottom of the box-type resistance furnace body for recovering waste heat inside the box-type resistance furnace body. The waste heat recovery assembly includes: a waste heat recovery box, a heat-conducting copper pipe, a water inlet pipe, a sealing cover, and a base.

[0007] In a further preferred embodiment, a waste heat recovery box is installed at the bottom of the box-type resistance furnace body. Multiple heat-conducting copper pipes are installed between the waste heat recovery box and the furnace chamber, and the top ends of the multiple heat-conducting copper pipes protrude from the inside of the furnace chamber. A water inlet pipe is installed on one side of the top of the waste heat recovery box, and the pipe body of the water inlet pipe passes through the outer end of the box-type resistance furnace body. A sealing cap is threaded to the top of the water inlet pipe, and a base is installed at each of the four corners of the bottom of the waste heat recovery box.

[0008] In a further preferred embodiment, multiple mounting slots are formed circumferentially on the inner wall of the furnace, and resistance heating wires are installed inside each of the multiple mounting slots.

[0009] In a further preferred embodiment, a thermocouple thermometer is installed on the inner wall of the furnace chamber, a temperature control box is installed on the top of the box-type resistance furnace body, the resistance heating wire and the thermocouple thermometer are electrically connected to the temperature control box, a control panel is installed on the outside of the temperature control box, and a temperature display meter is installed on one side of the control panel.

[0010] In a further preferred embodiment, a protective frame is installed on one side of the bottom of the furnace interior, the top ends of the multiple heat-conducting copper pipes are located inside the protective frame, and an opening slot is provided on the top of the protective frame.

[0011] In a further preferred embodiment, a drain pipe is installed on one side of the bottom of the waste heat recovery tank, a solenoid valve is installed on the drain pipe, and a liquid level window is installed on the outside of the waste heat recovery tank.

[0012] Compared with existing technologies, the beneficial effects of this utility model are: (1) By using the waste heat recovery box, heat-conducting copper pipe, water inlet pipe, sealing cover and base together, the waste heat inside the furnace can be introduced into the waste heat recovery box, and the water stored in the waste heat recovery box can be heated to make the stored water into high temperature hot water. After some of the heat inside the furnace is dissipated to the outside of the box-type resistance furnace, the temperature inside the furnace will decrease. At this time, the hot water in the waste heat recovery box is a high temperature zone. The heat can be introduced into the furnace through the heat-conducting copper pipe to perform thermal compensation in the furnace, so that the furnace can be heated quickly, shortening the heating time and reducing the loss of electrical energy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic cross-sectional view of the present invention.

[0015] Figure 3 This is a schematic diagram of the internal structure of the furnace chamber of this utility model.

[0016] Figure 4This is a schematic diagram of the waste heat recovery box structure of this utility model.

[0017] Figures 1-4 middle: Box-type resistance furnace body; 101, furnace chamber; 102, furnace door; 103, observation window; 104, mounting slot; 105, resistance heating wire; 106, thermocouple thermometer; 107, temperature control box; 108, control panel; 109, temperature display.

[0018] Waste heat recovery box; 201, heat-conducting copper pipe; 202, water inlet pipe; 203, sealing cover; 204, base.

[0019] Protective frame; 301, opening groove.

[0020] Drain pipe; 401, solenoid valve; 402, liquid level window. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the present utility model will be described in detail below with reference to the accompanying drawings and preferred embodiments. It should be noted that the terms "left," "right," "upper," "lower," "top," "bottom," "one side," "provided with," "installed with," "connected with," "top end," "bottom end," "provided with," "open with," "fixed connection," "movable connection," "threaded connection," "clamping," "sleeving," "outer end," "inner end," "external," and "internal" in the following description are only for ease of understanding and description, and are not intended to indicate or imply that the components or structures referred to must have a specific orientation or installation method, and therefore should not be construed as limitations on this utility model.

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. Example

[0024] like Figures 1-4As shown, a box-type resistance furnace with waste heat recovery includes: a box-type resistance furnace body 1, a furnace chamber 101, a furnace door 102, an observation window 103, and a waste heat recovery assembly. The furnace chamber 101 is located inside the box-type resistance furnace body 1, and the furnace door 102 is rotatably connected to the outside of the furnace chamber 101 via a hinge. An observation window 103 is installed on the furnace door 102. A waste heat recovery assembly is located at the bottom of the box-type resistance furnace body 1 for recovering waste heat inside the box-type resistance furnace body 1. The waste heat recovery assembly includes: a waste heat recovery box 2, a heat-conducting copper pipe 201, a water inlet pipe 202, a sealing cover 203, and a base 204.

[0025] The furnace chamber 101 has multiple mounting slots 104 circumferentially formed on its inner wall, and resistance heating wires 105 are installed inside each of the multiple mounting slots 104.

[0026] When heat treating materials, the furnace door 102 on the outside of the box-type resistance furnace body 1 is opened to expose the furnace chamber 101 inside the box-type resistance furnace body 1. At this time, the materials to be heated are placed inside the furnace chamber 101, and then the furnace door 102 is closed again to seal the inside of the furnace chamber 101 to prevent heat loss during the heating process. After the materials are placed inside the box-type resistance furnace body 1, the resistance heating wire 105 is started through the control panel 108 on the temperature control box 107. When the resistance heating wire 105 is working, it will slowly generate heat inside the furnace chamber 101 to heat the materials. Since the resistance heating wire 105 is arranged circumferentially inside the furnace chamber 101, the materials can be heated evenly during the heating process.

[0027] Thermocouple thermometer 106 is installed on the inner wall of furnace chamber 101, and temperature control box 107 is installed on the top of box-type resistance furnace body 1. Resistance heating wire 105 and thermocouple thermometer 106 are electrically connected to temperature control box 107 respectively. Control panel 108 is installed on the outside of temperature control box 107, and temperature display meter 109 is installed on one side of control panel 108.

[0028] During the heating process of materials inside the furnace 101, the temperature inside the furnace 101 can be detected by thermocouple thermometer 106, and the detected temperature information is transmitted to temperature control box 107 by means of electrical signal. The temperature value inside the furnace 101 can be displayed on the temperature display table 109 on the temperature control box 107 so that the staff can view and know the temperature information inside the furnace 101.

[0029] Among them, a waste heat recovery box 2 is installed at the bottom of the box-type resistance furnace body 1. Multiple heat-conducting copper pipes 201 are installed between the waste heat recovery box 2 and the furnace chamber 101, and the top of the multiple heat-conducting copper pipes 201 protrudes into the furnace chamber 101. A water inlet pipe 202 is installed on one side of the top of the waste heat recovery box 2. The pipe body of the water inlet pipe 202 passes through the outer end of the box-type resistance furnace body 1. A sealing cap 203 is threadedly connected to the top of the water inlet pipe 202. A base 204 is installed at each of the four corners of the bottom of the waste heat recovery box 2.

[0030] When using the main body 1 of the box-type resistance furnace, loosen and remove the sealing cap 203 on the top of the water inlet pipe 202, and add water into the waste heat recovery tank 2 through the water inlet pipe 202. During the water addition process, the water level inside the waste heat recovery tank 2 can be viewed through the liquid level window 402 to avoid adding too much water and causing waste from overflowing from the water inlet pipe 202. After adding water, tighten the sealing cap 203 on the top of the water inlet pipe 202 to seal the water inlet pipe 202. When the furnace chamber 101 generates heat, multiple heat-conducting copper pipes 201 are installed between the waste heat recovery tank 2 and the furnace chamber 101, and the tops of the multiple heat-conducting copper pipes 201 protrude from the inside of the furnace chamber 101. The heat-conducting copper pipes 201 can transfer the waste heat inside the furnace chamber 101 into the waste heat recovery tank 2, heating the water stored inside the waste heat recovery tank 2 and turning the stored water into high-temperature hot water.

[0031] When the furnace door 102 is opened, the heated material inside the furnace chamber 101 is taken out, and unheated material is put into the furnace chamber 101, and then the furnace door 102 is closed again, some heat inside the furnace chamber 101 will dissipate to the outside of the box-type resistance furnace body 1 during this process, that is, the temperature inside the furnace chamber 101 will decrease. At this time, the hot water in the waste heat recovery box 2 is in the high-temperature zone, and heat can be introduced into the furnace chamber 101 through the heat-conducting copper pipe 201 to perform thermal compensation inside the furnace chamber 101, so that the inside of the furnace chamber 101 can be heated quickly, shortening the heating time and reducing the power consumption.

[0032] Among them, a protective frame 3 is installed on one side of the bottom of the furnace 101, and the tops of multiple heat-conducting copper pipes 201 are located inside the protective frame 3. An opening slot 301 is opened on the top of the protective frame 3.

[0033] When multiple heat-conducting copper pipes 201 are used inside the furnace chamber 101, the protective frame 3 can shield and protect the multiple heat-conducting copper pipes 201 to prevent them from being hit when picking up or putting down materials, thus avoiding damage to the heat-conducting copper pipes 201. The opening groove 301 at the top of the protective frame 3 allows heat to be dissipated to the area around the heat-conducting copper pipes 201, meaning that the heat-conducting copper pipes 201 can guide the waste heat into the waste heat recovery box 2.

[0034] Among them, a drain pipe 4 is installed on one side of the bottom of the waste heat recovery box 2, and a solenoid valve 401 is installed on the drain pipe 4. A liquid level window 402 is installed on the outside of the waste heat recovery box 2.

[0035] During the use of the waste heat recovery box 2, the water level inside the waste heat recovery box 2 can be viewed through the liquid level window 402. This allows the user to know in time whether the water inside the waste heat recovery box 2 has been used up, and water can be added to the waste heat recovery box 2 in time through the water inlet pipe 202. When it is necessary to drain the water inside the waste heat recovery box 2, the solenoid valve 401 is activated through the control panel 108 to open the drain pipe 4 so that the water inside the waste heat recovery box 2 can be drained for use.

[0036] When the box-type resistance furnace body 1 is in use, a power cord connected to the temperature control box 107 is installed on the back of the box-type resistance furnace body 1. A plug is installed at one end of the power cord. The plug of the power cord is inserted into an external socket to connect the power supply. The temperature control box 107 is electrically connected to the resistance heating wire 105, the thermocouple thermometer 106 and the solenoid valve 401 respectively, so that the temperature control box 107, the resistance heating wire 105, the thermocouple thermometer 106 and the solenoid valve 401 are powered on and used. The temperature control box 107 can control the resistance heating wire 105, the thermocouple thermometer 106 and the solenoid valve 401 to start or stop. Those skilled in the art can implement this based on the same or similar principles in the prior art. This part is not the innovation of this utility model.

[0037] Working principle: When heat treating materials, the furnace door 102 on the outside of the box-type resistance furnace body 1 is opened to expose the furnace chamber 101 inside the box-type resistance furnace body 1. At this time, the materials to be heated are placed inside the furnace chamber 101, and then the furnace door 102 is closed again to seal the inside of the furnace chamber 101 to prevent heat loss during the heating process. After the materials are placed inside the box-type resistance furnace body 1, the resistance heating wire 105 is started through the control panel 108 on the temperature control box 107. When the resistance heating wire 105 is working, it will slowly generate heat inside the furnace chamber 101 to heat the materials. Since the resistance heating wire 105 is arranged circumferentially inside the furnace chamber 101, the materials can be heated evenly during the heating process.

[0038] When using the main body 1 of the box-type resistance furnace, loosen and remove the sealing cap 203 on the top of the water inlet pipe 202, and add water into the waste heat recovery tank 2 through the water inlet pipe 202. During the water addition process, the water level inside the waste heat recovery tank 2 can be viewed through the liquid level window 402 to avoid adding too much water and causing waste from overflowing from the water inlet pipe 202. After adding water, tighten the sealing cap 203 on the top of the water inlet pipe 202 to seal the water inlet pipe 202. When the furnace chamber 101 generates heat, multiple heat-conducting copper pipes 201 are installed between the waste heat recovery tank 2 and the furnace chamber 101, and the tops of the multiple heat-conducting copper pipes 201 protrude from the inside of the furnace chamber 101. The heat-conducting copper pipes 201 can transfer the waste heat inside the furnace chamber 101 into the waste heat recovery tank 2, heating the water stored inside the waste heat recovery tank 2 and turning the stored water into high-temperature hot water.

[0039] When the furnace door 102 is opened, the heated material inside the furnace chamber 101 is taken out, and unheated material is put into the furnace chamber 101, and then the furnace door 102 is closed again, some heat inside the furnace chamber 101 will dissipate to the outside of the box-type resistance furnace body 1 during this process, that is, the temperature inside the furnace chamber 101 will decrease. At this time, the hot water in the waste heat recovery box 2 is in the high-temperature zone, and heat can be introduced into the furnace chamber 101 through the heat-conducting copper pipe 201 to perform thermal compensation inside the furnace chamber 101, so that the inside of the furnace chamber 101 can be heated quickly, shortening the heating time and reducing the power consumption.

[0040] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0041] The above provides a detailed description of a box-type resistance furnace with waste heat recovery provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A box-type resistance furnace with waste heat recovery, characterized by, include: The box-type resistance furnace body (1), furnace chamber (101), furnace door (102), observation window (103) and waste heat recovery assembly are provided. The box-type resistance furnace body (1) is provided with a furnace chamber (101) inside. The furnace door (102) is connected to the outside of the furnace chamber (101) by a hinge. An observation window (103) is installed on the furnace door (102). The bottom of the box-type resistance furnace body (1) is provided with a waste heat recovery assembly for recovering the waste heat inside the box-type resistance furnace body (1). The waste heat recovery assembly includes: waste heat recovery box (2), heat-conducting copper pipe (201), water inlet pipe (202), sealing cover (203) and base (204).

2. The box-type resistance furnace with waste heat recovery according to claim 1, characterized in that, The bottom of the box-type resistance furnace body (1) is equipped with a waste heat recovery box (2). Multiple heat-conducting copper pipes (201) are installed between the waste heat recovery box (2) and the furnace chamber (101), and the top of the multiple heat-conducting copper pipes (201) protrudes into the furnace chamber (101). A water inlet pipe (202) is installed on one side of the top of the waste heat recovery box (2). The pipe body of the water inlet pipe (202) passes through the outer end of the box-type resistance furnace body (1). A sealing cap (203) is threaded to the top of the water inlet pipe (202). A base (204) is installed at each of the four corners of the bottom of the waste heat recovery box (2).

3. The box-type resistance furnace with waste heat recovery according to claim 1, characterized in that, The inner wall of the furnace (101) has multiple mounting slots (104) circumferentially arranged, and resistance heating wires (105) are installed inside the multiple mounting slots (104).

4. The box-type resistance furnace with waste heat recovery according to claim 3, characterized in that, A thermocouple thermometer (106) is installed on the inner wall of the furnace chamber (101). A temperature control box (107) is installed on the top of the box-type resistance furnace body (1). The resistance heating wire (105) and the thermocouple thermometer (106) are electrically connected to the temperature control box (107) respectively. A control panel (108) is installed on the outside of the temperature control box (107). A temperature display meter (109) is installed on one side of the control panel (108).

5. The box-type resistance furnace with waste heat recovery according to claim 2, characterized in that, A protective frame (3) is installed on one side of the bottom of the furnace (101), and the top ends of multiple heat-conducting copper pipes (201) are located inside the protective frame (3). An opening slot (301) is provided on the top of the protective frame (3).

6. The box-type resistance furnace with waste heat recovery according to claim 2, characterized in that, A drain pipe (4) is installed on one side of the bottom of the waste heat recovery box (2), and a solenoid valve (401) is installed on the drain pipe (4). A liquid level window (402) is installed on the outside of the waste heat recovery box (2).

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