Energy-saving bright annealing system

Abstract

The utility model provides an energy-saving bright annealing system which comprises a first bright annealing furnace, a second bright annealing furnace, an induced draft fan and a boiler, the first bright annealing furnace is provided with a first air vent, a second air vent and a first normal-temperature air inlet; the second bright annealing furnace is provided with a third ventilation opening, a fourth ventilation opening, a fifth ventilation opening and a second normal-temperature air inlet, the first ventilation opening and the fourth ventilation opening are communicated with an air inlet of the induced draft fan, valves are arranged at the communicated parts, the fifth ventilation opening and an air inlet of the boiler are communicated with an air outlet of the induced draft fan, and valves are arranged at the communicated parts; the second ventilation opening communicates with the third ventilation opening, and a valve is arranged at the communicating part. According to the energy-saving bright annealing system provided by the utility model, two bright annealing furnaces are alternately used, after one bright annealing furnace finishes annealing and brightening of an iron wire, heat of the bright annealing furnace is transferred to the other bright annealing furnace through a control valve and an induced draft fan, so that the bright annealing furnace is heated on the basis of a certain temperature, and meanwhile, the energy is saved. Waste heat of the bright annealing furnace can be transmitted to the boiler, heat energy recovery is achieved, and the energy-saving effect is achieved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of bright annealing furnaces, and particularly relates to an energy-saving bright annealing system. Background Art

[0002] Bell-type bright annealing furnaces can be widely used for bright annealing of non-ferrous metals such as copper and aluminum alloys, and ferrous metals such as plain carbon steel, silicon steel, and alloy steel in the form of coiled strips, coiled pipes, wire rods, etc. Its principle is a heat treatment process in which metal materials are heated to an appropriate temperature, held for a certain period of time, and then slowly cooled.

[0003] Common annealing processes include: recrystallization annealing, stress relief annealing, spheroidizing annealing, full annealing, etc. The purpose of annealing: mainly to reduce the hardness of metal materials, improve plasticity, facilitate machining or pressure processing, reduce residual stress, improve the uniformity of structure and composition, or prepare the structure for subsequent heat treatment, etc. The working temperature of existing annealing furnaces is usually about 800 degrees, and cooling usually requires a water circuit for temperature reduction. This process of heating and cooling consumes relatively high energy. Summary of the Utility Model

[0004] In view of the defects and deficiencies of the current technology, an embodiment of the utility model proposes an energy-saving bright annealing system that can effectively save energy. The technical solution is as follows:

[0005] The utility model proposes an energy-saving bright annealing system, which includes a first bright annealing furnace (1), a second bright annealing furnace (2), an induced draft fan (3), and a boiler (4);

[0006] The first bright annealing furnace (1) has a first air vent (5), a second air vent (6), and a first normal temperature air inlet, and the first normal temperature air inlet is provided with a valve;

[0007] The second bright annealing furnace has a third air vent (7), a fourth air vent (8), a fifth air vent (9), and a second normal temperature air inlet, and the second normal temperature air inlet is provided with a valve;

[0008] The first air vent (5) and the fourth air vent (8) are respectively connected to the air inlet of the induced draft fan (3), and valves are respectively arranged at the connecting parts;

[0009] The fifth air vent (9) and the air inlet of the boiler (4) are respectively connected to the air outlet of the induced draft fan (3), and valves are respectively arranged at the connecting parts;

[0010] The second air vent (6) is connected to the third air vent (7), and a valve is arranged at the connecting part;

[0011] The first vent (5) is located at the upper end of the first bright annealing furnace (1) to communicate with the upper end of the inner cavity of the first bright annealing furnace, and the second vent (6) is located at the lower end of the first bright annealing furnace (1) to communicate with the bottom of the inner cavity of the first bright annealing furnace (1);

[0012] The third vent (7) and the fourth vent (8) are located at the upper end of the second bright annealing furnace (2) to communicate with the upper end of the inner cavity of the second bright annealing furnace (2), and the fifth vent (9) is located at the lower end of the second bright annealing furnace (2) to communicate with the bottom of the inner cavity of the second bright annealing furnace (2);

[0013] The bright annealing furnace is a full-hydrogen bell-type bright annealing furnace.

[0014] As a preference of the above technical solution, the valve and the induced draft fan (3) are respectively connected to a controller to respectively control their opening / closing.

[0015] The present utility model provides an energy-saving bright annealing system capable of effectively saving energy. Two bright annealing furnaces are used alternately. After one bright annealing furnace finishes annealing and brightening the iron wire, the heat of this bright annealing furnace is transferred to another bright annealing furnace by controlling the valve and the induced draft fan, so that the other bright annealing furnace can be heated up on the basis of a certain temperature. At the same time, the waste heat of the bright annealing furnace can be transferred to the boiler to realize the recovery of thermal energy and achieve the energy-saving effect. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic plan view of the energy-saving bright annealing system provided in the embodiment of the present utility model;

[0018] <##> Figure 2 It is a schematic structural view of the energy-saving bright annealing system provided in the embodiment of the present utility model;

[0019] Figure 3 It is Figure 2 the rear view of

[0020] Figure 4 It is Figure 2 the perspective view of

[0021] Figure 5 It is Figure 2 the perspective view of the other side of Detailed Embodiment

[0022] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the embodiments of the present utility model in detail with reference to the accompanying drawings.

[0023] The present utility model provides an energy-saving bright annealing system, including a first bright annealing furnace 1, a second bright annealing furnace 2, an induced draft fan 3, and a boiler 4;

[0024] The first bright annealing furnace 1 has a first ventilation port 5, a second ventilation port 6, and a first normal temperature intake port, and the first normal temperature intake port is provided with a valve;

[0025] The second bright annealing furnace has a third ventilation port 7, a fourth ventilation port 8, a fifth ventilation port (9), and a second normal temperature intake port, and the second normal temperature intake port is provided with a valve;

[0026] The first ventilation port 5 and the fourth ventilation port 8 are respectively connected to the intake port of the induced draft fan 3, and valves are respectively provided at the connected parts;

[0027] The fifth ventilation port 9 and the boiler intake port 10 are respectively connected to the outlet port of the induced draft fan 3, and valves are respectively provided at the connected parts;

[0028] The second ventilation port 6 and the third ventilation port 7 are connected, and a valve is provided at the connected part.

[0029] The first ventilation port 5 is located at the upper end of the first bright annealing furnace 1 to communicate with the upper end of the inner cavity of the first bright annealing furnace, and the second ventilation port 6 is located at the lower end of the first bright annealing furnace 1 to communicate with the bottom of the inner cavity of the first bright annealing furnace 1.

[0030] The third ventilation port 7 and the fourth ventilation port 8 are located at the upper end of the second bright annealing furnace 2 to communicate with the upper end of the inner cavity of the second bright annealing furnace 2, and the fifth ventilation port 9 is located at the lower end of the second bright annealing furnace 2 to communicate with the bottom of the inner cavity of the second bright annealing furnace 2.

[0031] The valves and the induced draft fan 3 are respectively connected to a controller to respectively control their opening / closing.

[0032] The bright annealing furnace is a full-hydrogen bell-type bright annealing furnace.

[0033] A thermal cycle control method for an energy-saving bright annealing system includes the following steps:

[0034] 1) During the heating process of the first bright annealing furnace 1, control the valve to close the first ventilation port 5 and the second ventilation port 6, and stop the heating power supply when the temperature of the first bright annealing furnace 1 reaches the rated temperature;

[0035] 2) Control the valve to close the No. 4 vent 8 and the inlet of the boiler 4, and at the same time control the induced draft fan 3 to open. At this time, the heat in the first bright annealing furnace 1 passes through the No. 1 vent 5, the induced draft fan 3, the No. 5 vent 9, the second bright annealing furnace 2, the No. 3 vent 7, and the No. 2 vent 6 and then returns to the first bright annealing furnace 1 to form a closed circulation space, so as to transfer the heat energy of the first bright annealing furnace 1 to the second bright annealing furnace 2. When the temperatures of the first bright annealing furnace 1 and the second bright annealing furnace 2 are equal, temporarily stop the operation of the induced draft fan 3. The equal temperature is 300 - 350 degrees, achieving more than 40% energy saving;

[0036] 3) Control the valve to close the space between the No. 2 vent 6 and the No. 3 vent 7, close the space between the No. 5 vent 9 and the outlet of the induced draft fan 3, and close the space between the No. 4 vent 8 and the inlet of the induced draft fan 3. At this time, control the second bright annealing furnace 2 to start power supply and heating to increase the temperature on the basis of 300 - 350 degrees;

[0037] 4) Control the valve to conduct the space between the outlet of the induced draft fan 3 and the inlet of the boiler 4, and at the same time control the induced draft fan 3 and the first normal temperature inlet valve to open. At this time, the normal temperature air entering the first bright annealing furnace 1 from the first normal temperature inlet passes through the No. 1 vent 5 into the induced draft fan 3 and then transports the waste heat to the boiler 4 through its outlet. While cooling the first bright annealing furnace 1, the waste heat is transferred to the boiler 4 through the induced draft fan 3 to heat and produce 100 - degree boiling water on the basis of the waste heat temperature, achieving more than 50% recovery of thermal energy;

[0038] 5) When the second bright annealing furnace 2 reaches the rated temperature of 750 degrees, stop the electric furnace heating power supply. Control the valve to conduct the space between the No. 2 vent 6 and the No. 3 vent 7, conduct the space between the No. 1 vent 5 and the inlet of the induced draft fan 3, conduct the space between the outlet of the induced draft fan 3 and the No. 5 vent 9, close the No. 4 vent 8, and close the inlet of the boiler 4. At this time, a closed circulation space is formed between the second bright annealing furnace 2 and the first bright annealing furnace 1. Control the induced draft fan 3 to open to transfer the heat energy of the second bright annealing furnace 2 to the first bright annealing furnace 1. When the temperatures of the second bright annealing furnace 2 and the first bright annealing furnace 1 are equal, temporarily stop the operation of the induced draft fan. The equal temperature is 300 - 350 degrees, achieving more than 40% energy saving;

[0039] 6) Control the valve to close the space between the No. 2 vent 6 and the No. 3 vent 7, close the space between the No. 1 vent 5 and the inlet of the induced draft fan 3, and seal the space between the outlet of the induced draft fan 3 and the No. 5 vent 9. The first bright annealing furnace starts heating and increasing the temperature on the basis of 300 - 350 degrees;

[0040] 7) Control the valve to make the fourth vent 8 communicate with the intake port of the induced draft fan 3, and the outlet port of the induced draft fan 3 communicate with the intake port of the boiler 4. Open the induced draft fan 3 and the valve of the second normal temperature intake port. At this time, the normal temperature air entering the second bright annealing furnace 2 from the second normal temperature intake port starts to cool the second bright annealing furnace 2. At the same time, the waste heat is transferred to the boiler 4 through the induced draft fan 3 to heat 100-degree boiling water on the basis of the waste heat temperature, achieving more than 50% of waste heat recovery.

[0041] The present utility model provides an energy-saving bright annealing system capable of effectively saving energy. Two bright annealing furnaces are used alternately. After one bright annealing furnace finishes annealing and brightening the iron wire, the heat of this bright annealing furnace is transferred to another bright annealing furnace by controlling the valve and the induced draft fan, so that it can be heated up on the basis of a certain temperature. At the same time, the waste heat of the bright annealing furnace can be transferred to the boiler to achieve waste heat recovery and reach the energy-saving effect.

[0042] This description sets forth the technical solution of the present utility model, rather than limiting it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent substitution on some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An energy-saving bright annealing system, characterized in that, It includes a first bright annealing furnace (1), a second bright annealing furnace (2), a draft fan (3) and a boiler (4); The first bright annealing furnace (1) has a first vent (5), a second vent (6) and a first normal temperature air inlet which is equipped with a valve; The second bright annealing furnace has a third vent (7), a fourth vent (8), a fifth vent (9) and a second normal temperature air inlet which is equipped with a valve; The first vent (5) and the fourth vent (8) are respectively connected to the air inlet of the draft fan (3), and valves are respectively arranged at the connecting parts; The fifth vent (9) and the air inlet of the boiler (4) are respectively connected to the air outlet of the draft fan (3), and valves are respectively arranged at the connecting parts; The second vent (6) is connected to the third vent (7), and a valve is arranged at the connecting part; The first vent (5) is located at the upper end of the first bright annealing furnace (1) to conduct with the upper end of the inner cavity of the first bright annealing furnace, and the second vent (6) is located at the lower end of the first bright annealing furnace (1) to conduct with the bottom of the inner cavity of the first bright annealing furnace (1); The third vent (7) and the fourth vent (8) are located at the upper end of the second bright annealing furnace (2) to conduct with the upper end of the inner cavity of the second bright annealing furnace (2), and the fifth vent (9) is located at the lower end of the second bright annealing furnace (2) to conduct with the bottom of the inner cavity of the second bright annealing furnace (2); The bright annealing furnace is a fully hydrogen bell-type bright annealing furnace.

2. The energy-saving bright annealing system according to claim 1, wherein The valve and the draft fan (3) are respectively connected to a controller to respectively control their opening / closing.

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