Environment-friendly annealing device for forging annealing

Abstract

The utility model relates to the technical field of annealing furnace equipment, and discloses an environment-friendly annealing device for forging annealing, which comprises an annealing furnace structure, and two gas purification components are embedded and fixed on the top surface of the annealing furnace structure; the annealing furnace structure comprises a first shell and a hearth wrapped and fixed in an inner cavity of the first shell. Through the synergistic catalysis of a palladium frame and two layers of rhodium screen plates in the gas purification assembly, harmful gas generated in the annealing process can be effectively decomposed, pollutant emission is reduced, the heat storage liquid circulation system absorbs waste gas waste heat generated in the gas purification process and conveys the waste gas waste heat back into a cavity of the furnace body, heat energy recycling is achieved, energy waste is reduced, and the service life of the furnace body is prolonged. The overall energy efficiency is improved. The cavity between the hearth and the first shell is filled with heat storage liquid, heat is evenly distributed through heat convection, temperature fluctuation in the furnace is reduced, temperature consistency in the forging annealing process is guaranteed, and therefore the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of annealing furnace equipment, specifically to an environmentally friendly annealing device for forging annealing. Background Technology

[0002] In the field of metal forging processing, annealing is a key heat treatment process for improving the mechanical properties of materials and eliminating internal stress. However, traditional annealing equipment still has significant shortcomings in terms of environmental protection, energy efficiency, and process control, specifically manifested in the following problems:

[0003] 1. Insufficient treatment of harmful gases: During the annealing process, grease, impurities, or the material's own components on the surface of forgings can easily generate harmful gases such as carbon monoxide and sulfides at high temperatures. Existing technologies mostly employ direct emission or simple filtration, lacking efficient catalytic purification methods, leading to environmental pollution.

[0004] 1. Low thermal energy utilization rate: The thermal energy of traditional annealing furnaces is mainly lost through heat dissipation from the furnace body or exhaust gas emissions, lacking a waste heat recovery mechanism, resulting in serious energy waste. Although some equipment uses heat insulation materials, it cannot achieve active recycling of thermal energy, leading to high energy costs.

[0005] 3. Poor temperature uniformity; uneven temperature distribution inside the furnace can easily cause local overheating or underheating of forgings, affecting the annealing quality. Existing technologies rely on a single heating element layout or forced air cooling, making it difficult to achieve stable and uniform thermal field control.

[0006] Therefore, those skilled in the art have proposed a solution for an environmentally friendly annealing device for forging annealing to address the shortcomings of the existing annealing devices mentioned above. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides an environmentally friendly annealing device for forging annealing, thereby solving the problems mentioned in the background art.

[0008] This utility model provides the following technical solution: it includes an annealing furnace structure, and two gas purification components are embedded and fixed on the top surface of the annealing furnace structure; the annealing furnace structure includes an outer shell, a furnace chamber fixed in the inner cavity of the outer shell, and a protective gas inlet inserted through and into the inner cavity of the furnace chamber; the furnace chamber has a cavity inside, the cavity is filled with heat storage liquid, and two round holes for installing the gas purification components are opened on the top surface of the cavity and the outer shell.

[0009] The gas purification assembly includes a second outer shell inserted into a circular hole, a palladium frame fixed in the inner cavity of the second outer shell, and two layers of rhodium mesh plates fixedly connected in the inner cavity of the palladium frame. A water pump is fixed on the outer side wall of the second outer shell. The pumping port of the water pump is connected to a coil located in the upper space of the inner cavity of the second outer shell through a pipe joint. The draining port of the water pump is connected to a drain pipe through a pipe joint.

[0010] The end of the drain pipe away from the water pump extends into the right side of the cavity, and the end of the coil away from the water pump extends into the left side of the cavity.

[0011] As a preferred embodiment of this utility model, two support legs are fixedly connected to the bottom surface of the outer shell.

[0012] As a preferred embodiment of this utility model, a furnace door is hinged to the front port of the outer shell and the furnace chamber.

[0013] As a preferred embodiment of this utility model, the bottom port of the second outer shell is flush with the bottom of the port of the circular hole.

[0014] As a preferred embodiment of this utility model, the outer ring surface of the palladium frame is fixedly connected to the inner cavity sidewall of the outer shell, and the outer ring surface of the rhodium mesh plate is fixedly connected to the inner sidewall of the palladium frame.

[0015] As a preferred embodiment of this utility model, the palladium frame and the interior of the palladium frame are provided with several through holes for the upward circulation of harmful gases inside the furnace.

[0016] As a preferred embodiment of this utility model, the coil is coiled in a serpentine shape within the inner cavity of the outer shell, and a heat storage liquid flows inside the coil.

[0017] As a preferred technical solution of this utility model, the left and right side walls of the outer shell are respectively provided with through holes for the drain pipe and the coil to pass through.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] Highly efficient and environmentally friendly, reducing pollution

[0020] The synergistic catalytic effect of the palladium frame and two layers of rhodium mesh in the gas purification component effectively decomposes harmful gases generated during annealing, reducing pollutant emissions. The regenerable liquid circulation system absorbs the waste heat generated during gas purification and returns it to the furnace cavity, realizing heat energy reuse, reducing energy waste, and improving overall energy efficiency. The cavity between the furnace chamber and the outer shell is filled with regenerable liquid, which distributes heat evenly through thermal convection, reducing temperature fluctuations within the furnace and ensuring temperature consistency during the forging annealing process, thereby improving product quality. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of the annealing furnace;

[0022] Figure 2 This is a schematic diagram of an annealing furnace;

[0023] Figure 3 This is a schematic diagram of the furnace.

[0024] Figure 4 This is a schematic diagram of a gas purification component.

[0025] In the diagram: 1. Annealing furnace structure; 11. Outer shell one; 12. Support leg; 13. Furnace chamber; 14. Protective gas inlet; 15. Cavity; 16. Round hole; 2. Gas purification component; 21. Outer shell two; 22. Drain pipe; 23. Water pump; 24. Coil; 25. Palladium frame; 26. Rhodium mesh plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-4 As shown, an environmentally friendly annealing device for forging annealing includes an annealing furnace structure 1 and two gas purification components 2; the two gas purification components 2 are fixedly installed on the top surface of the annealing furnace structure 1 to treat the harmful gases generated during the annealing process.

[0028] The annealing furnace structure includes an outer shell 11, a furnace chamber 13, support legs 12, a protective gas inlet 14, and a cavity 15. The outer shell 11 is a cuboid structure with two welded support legs 12 at its bottom for furnace support. A hinged furnace door, used for loading forgings, is connected to the front end of the outer shell 11. The furnace chamber 13 is nested and fixed within the inner cavity of the outer shell 11, and is used to place and heat the forgings. The cavity 15 is formed by the interlayer between the furnace chamber 13 and the outer shell 11, and is filled with a heat storage liquid, such as molten salt or high-temperature heat transfer oil, to store heat energy and improve thermal efficiency. The protective gas inlet 14 penetrates the side walls of the outer shell 11 and the furnace chamber 13 and is inserted into the inner cavity of the furnace to introduce protective gases such as nitrogen or argon into the furnace chamber 13 to prevent oxidation of the forgings. Two symmetrically distributed circular holes 16 are formed at the top of the cavity 15 and the top of the outer shell 11 for installing a gas purification assembly 2.

[0029] Each gas purification component 2 includes a second outer shell 21, a water pump 23, a coil 24, a palladium frame 25, a rhodium mesh plate 26, and a drain pipe 22. The second outer shell 21 is a cylindrical shell with a circular hole 16 inserted into its bottom, flush with the hole's opening. Through holes are provided on both sides of the second outer shell 21 for the drain pipe 22 and the coil 24 to pass through. The palladium frame 25 is fixed to the center of the inner cavity of the second outer shell 21, and its outer ring is welded to the inner wall of the second outer shell 21. Multiple through holes are evenly distributed on the surface of the palladium frame 25 for gas flow. Two vertically stacked rhodium mesh plates 26 are fixed inside the palladium frame 25, with the edges of the rhodium mesh plates welded to the inner wall of the palladium frame 25 to form a gas filter layer. The water pump 23 is fixed to the outside of the second outer shell 21, its pumping port connected to the coil 24 via a pipe connector, and its draining port connected to the drain pipe 22. The coil 24 is coiled in a serpentine shape around the upper part of the inner cavity of the outer shell 21. One end of the coil is connected to the water pump 23, and the other end extends to the left side of the cavity 15. The heat storage liquid flows inside the coil 24. One end of the drain pipe 22 is connected to the water pump 23, and the other end extends to the right side of the cavity 15, which is used to return the heat storage liquid to the cavity.

[0030] The workflow is as follows: During the annealing stage, the furnace door is opened, the forging is placed into the inner cavity of the furnace chamber 13, and the furnace door is closed. Protective gas is introduced into the furnace chamber 13 through the protective gas inlet 14, and the heating device (such as a heating wire) is started to anneal the forging. During the harmful gas purification stage, harmful gases containing carbon monoxide, sulfides, etc., generated during the annealing process rise to the top of the furnace chamber 13 and enter the inner cavity of the outer shell 21 of the gas purification component 2 through the round hole 16. The gas first contacts the palladium frame 25 and the rhodium mesh plate 26, and the harmful components are decomposed by the catalytic action of palladium and rhodium. The purified gas is discharged or recovered through the vent at the top of the outer shell 21. During the heat storage liquid circulation stage, the water pump 23 is started to draw the heat storage liquid on the left side of the cavity 15 into the coil 24. When the heat storage liquid flows through the coil 24, it absorbs the heat from the inner cavity of the outer shell 21 (from the gas purification process), and after heating, it flows back to the right side of the cavity 15 through the drain pipe 22. The heat storage liquid in cavity 15 distributes heat evenly through thermal convection, reducing heat loss in furnace 13.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly annealing apparatus for forging annealing, comprising an annealing furnace structure (1), characterized in that: Two gas purification components (2) are embedded and fixed on the top surface of the annealing furnace structure (1). The annealing furnace structure (1) includes an outer shell (11), a furnace chamber (13) that is fixed inside the inner cavity of the outer shell (11), and a protective gas inlet (14) that is inserted through into the inner cavity of the furnace chamber (13). The furnace chamber (13) has a cavity (15) inside, and the cavity (15) is filled with a heat storage liquid. The top surfaces of the cavity (15) and the outer shell (11) have two round holes (16) for the installation of the gas purification assembly (2). The gas purification assembly (2) includes a second outer shell (21) inserted into the round hole (16), a palladium frame (25) fixed in the inner cavity of the second outer shell (21), and two layers of rhodium mesh plates (26) fixedly connected in the inner cavity of the palladium frame (25). A water pump (23) is fixed on the outer side wall of the second outer shell (21). The pumping port of the water pump (23) is connected to a coil (24) located in the upper space of the inner cavity of the second outer shell (21) through a pipe joint. The draining port of the water pump (23) is connected to a drain pipe (22) through a pipe joint. The drain pipe (22) is located away from the water pump (23) and extends into the right side of the cavity (15). The coil (24) is located away from the water pump (23) and extends into the left side of the cavity (15).

2. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: Two feet (12) are fixedly connected to the bottom surface of the outer casing (11).

3. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: The front ports of the outer shell (11) and the furnace chamber (13) are hinged with furnace doors.

4. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: The bottom port of the outer shell (21) is flush with the bottom of the port of the circular hole (16).

5. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: The outer ring surface of the palladium frame (25) is fixedly connected to the inner cavity sidewall of the outer shell (21), and the outer ring surface of the rhodium mesh plate (26) is fixedly connected to the inner sidewall of the palladium frame (25).

6. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: Both the palladium frame (25) and the interior of the palladium frame (25) are provided with several through holes for the upward flow of harmful gases inside the furnace.

7. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: The coil (24) is coiled in a serpentine shape inside the inner cavity of the outer shell (21), and the heat storage liquid flows inside the coil (24).

8. The environmentally friendly annealing device for forging annealing according to claim 1, characterized in that: The outer casing 2 (21) has through holes on its left and right side walls for the drain pipe (22) and the coil (24) to pass through.

Images