crucible furnace

Abstract

The application discloses a crucible smelting furnace and a crucible smelting furnace with an energy-saving furnace head, the energy-saving furnace head comprises a combustion channel for placing a burner arranged on a furnace head main body, and a plurality of air holes uniformly arranged around an outlet of the combustion channel, mixed gas sprayed from the burner is combusted on the outlet of the combustion channel and an extension line of the combustion channel; wherein, a wind guide structure is arranged at the inside of the air hole or the outlet of the air hole, and the wind guide structure is arranged to guide the wind blown from the air hole to the outlet of the combustion channel / the extension line of the combustion channel. The wind sent into the heating cavity from the air hole can be fully combusted, and the heat can be effectively taken away at the same time, so that the energy efficiency ratio is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crucible furnace, in particular to a crucible furnace. BACKGROUND

[0002] The existing gas type crucible furnace is a heating furnace using natural gas and other fuel gas as fuel, which can realize efficient work of the gas furnace by using clean combustion mode.

[0003] The utility model discloses CN202021641541.X discloses a heat storage aluminum melting furnace, including furnace body, crucible, combustion device, heat storage structure and air exchange mechanism, furnace body is equipped with heating cavity, the crucible is installed to furnace body, the crucible is set in heating cavity in one end, and the combustion device includes the burner, and the burner one end is communicated heating cavity, and the mixed gas is burnt through the burner according to certain proportion, and the heat of combustion gas is sent into heating cavity and heats the crucible, and the heat storage structure is installed on the furnace body, and it includes base and heat storage assembly, and the base is installed on the furnace body, and the base is relatively provided with two heat storage cavities in, and the bottom end of heat storage cavity is communicated with heating cavity, and each heat storage cavity is equipped with a heat storage assembly, and the heat storage assembly includes a plurality of heat storage blocks, and the heat storage block is heat stored in the heat storage cavity, and the air exchange mechanism is communicated with the top of two heat storage cavities, and the air exchange mechanism can switchably suck the air of one heat storage cavity, so that the heat storage block in the heat storage cavity is heat stored, and the other heat storage cavity is blown, so that the heat storage block that has been heat stored in the heat storage cavity sends the heat into the heating cavity.

[0004] The above-mentioned heat storage aluminum melting furnace uses the air sent by the air exchange mechanism to make the burner burn more fully, and sends the generated heat into the heating cavity, but the air outlet of the air exchange mechanism is arranged on one side of the burner, so that the air sent by the air exchange mechanism cannot be fully burned, and the effect of sending heat into the heating cavity is affected. SUMMARY

[0005] In order to solve one of the technical problems existing in the prior art, the present application provides an energy-saving furnace head, which can make the air sent from the air hole fully burn by reasonably arranging the position of the air hole, and can effectively take away the heat, thereby improving the energy efficiency ratio.

[0006] In addition, the present application also provides a crucible furnace, which applies the energy-saving furnace head to effectively improve the energy efficiency ratio.

[0007] According to the energy-saving furnace head of the first aspect of the present application, the furnace head main body is provided with a combustion channel for placing the burner, and a plurality of air holes are uniformly arranged around the outlet of the combustion channel, and the mixed gas sprayed from the burner is burned on the outlet of the combustion channel and the extension line of the combustion channel.

[0008] The inside of the air hole or the outlet of the air hole is provided with a wind guide structure, which is arranged to guide the air blown out of the air hole to the outlet of the combustion channel / the extension line of the combustion channel.

[0009] The energy-saving furnace head has at least the following beneficial effects: the air hole arranged at the outlet of the combustion channel can make the fuel and air mix more uniformly, the fuel burns more fully, the uniformly arranged air hole can improve the air charging efficiency, more air can be input in a short time, the air hole can also guide the direction of the flame burning, the wind guide structure can more accurately control the direction of the air out of the air hole, thereby making the fuel burn more fully and reducing emissions.

[0010] The energy-saving furnace head has at least the following beneficial effects: the air hole arranged at the outlet of the combustion channel can make the fuel and air mix more uniformly, the fuel burns more fully, the uniformly arranged air hole can improve the air charging efficiency, more air can be input in a short time, the air hole can also guide the direction of the flame burning, the wind guide structure can more accurately control the direction of the air out of the air hole, thereby making the fuel burn more fully and reducing emissions.

[0011] The energy-saving furnace head has at least the following beneficial effects: the air hole arranged at the outlet of the combustion channel can make the fuel and air mix more uniformly, the fuel burns more fully, the uniformly arranged air hole can improve the air charging efficiency, more air can be input in a short time, the air hole can also guide the direction of the flame burning, the wind guide structure can more accurately control the direction of the air out of the air hole, thereby making the fuel burn more fully and reducing emissions.

[0012] A crucible furnace according to the second aspect of the present application comprises:

[0013] A furnace body is provided with a heating cavity;

[0014] A crucible is arranged in the furnace body, and one end of the crucible is arranged in the heating cavity;

[0015] The energy-saving furnace head is arranged in the furnace body, and the outlet of the combustion channel of the energy-saving furnace head is communicated with the heating cavity;

[0016] A combustion device comprises a burner, and the burner is arranged in the combustion channel of the energy-saving furnace head;

[0017] An air exchange mechanism comprises a fan and an air duct, the air duct is connected with the energy-saving furnace head, and the airflow flows between the air duct and the heating cavity through the air hole on the energy-saving furnace head.

[0018] According to the second aspect of the present application, the energy-saving furnace head is applied to the crucible furnace, the combustion efficiency of the crucible furnace is improved, the fuel is saved, the heat efficiency of the crucible furnace is improved, the air exchange mechanism is used in cooperation with the combustion device, the combustion state of the crucible furnace is optimized, the fuel combustion is more sufficient, the emission of greenhouse gases is reduced, and the generation amount of nitrogen oxides in the furnace is reduced, the air duct is arranged, the direction of fuel delivery is better guided, the fuel is always close to the bottom of the crucible during combustion, the fuel is more fully utilized, and the crucible is heated faster.

[0019] According to the second aspect of the present application, the energy-saving furnace head includes a first furnace head and a second furnace head, the first furnace head and the second furnace head are arranged at different positions of the heating cavity, and the first furnace head and the second furnace head are respectively provided with the burner.

[0020] The air duct includes a first air duct and a second air duct, the first air duct is connected with the first furnace head, and the second air duct is connected with the second furnace head. The first air duct and the second air duct can guide the direction of fuel, so that the utilization efficiency of fuel is improved, and the heating speed is improved.

[0021] According to the second aspect of the present application, the air exchange mechanism includes an air inlet channel and a smoke exhaust channel, and a four-way switch valve is arranged on the air exchange mechanism, the four-way switch valve is connected with the first air duct, the second air duct, the air inlet channel and the smoke exhaust channel respectively.

[0022] When the four-way switch valve is in a first state, the first air duct and the air inlet channel are communicated, and the second air duct and the smoke exhaust channel are communicated; when the four-way switch valve is switched to a second state, the first air duct and the smoke exhaust channel are communicated, and the second air duct and the air inlet channel are communicated. The access state of the first air duct and the second air duct is changed by using the four-way switch valve, so that the first air duct and the first air duct can be switched between the air inlet state and the smoke exhaust state to adapt to different use environments.

[0023] According to the second aspect of the present application, the first air duct and the second air duct are provided with heat storage devices. The heat storage devices can recycle waste heat generated during operation of the crucible furnace, the heat storage devices can release heat when the crucible furnace switches the air inlet channel, the preheated air can make the combustion temperature of the crucible furnace higher, the lower temperature air outside can avoid reducing the temperature in the crucible furnace, so that the working efficiency of the crucible furnace is improved, and the time required for the crucible furnace to reach the corresponding temperature is saved.

[0024] According to the second aspect of the present application, the heat storage device is a honeycomb heat storage brick. The heat storage brick can absorb waste gas heat for reuse, realize heat reuse, reduce gas combustion, save gas, and increase enterprise benefits.

[0025] According to the second aspect of the present application, the first air duct and the second air duct are wrapped with a heat preservation layer. The heat preservation layer can prevent heat loss of the first air duct and the second air duct, and ensure the temperature of the incoming air.

[0026] According to the second aspect of the present application, the fan is connected to the air inlet channel. The use of the fan for air supply can improve air supply efficiency and ensure sufficient mixing of fuel and air.

[0027] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are included to provide a further understanding of the technical scheme of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical scheme of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0029] Figure 1 is one of the schematic diagrams of the energy-saving furnace head of the first aspect of the present application;

[0030] Figure 2 is another schematic diagram of the energy-saving furnace head of the first aspect of the present application;

[0031] Figure 3 is Figure 2 is a cross-sectional view of A-A in FIG. 6;

[0032] Figure 4 is a third schematic diagram of the energy-saving furnace head of the first aspect of the present application;

[0033] Figure 5 is a schematic diagram of the crucible furnace of the second aspect of the present application;

[0034] Figure 6 is an exploded schematic diagram of the crucible furnace of the second aspect of the present application;

[0035] Figure 7 is a schematic diagram of the air exchange mechanism of the second aspect of the present application;

[0036] Figure 8 is an internal schematic diagram of the air exchange mechanism of the second aspect of the present application.

[0037] The drawing number is explained as follows: furnace head main body 100; air hole 110; air guide structure 120; air guide ring 130; air guide section 140; combustion channel 150;

[0038] Crucible 200; air exchange mechanism 210; four-way switch valve 220; furnace body 230;

[0039] First furnace head 300; second furnace head 310; first air duct 320; second air duct 330; air inlet 340;

[0040] Regenerator brick 400. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0042] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, or detachable connection or non-detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, intermediate structure, or the internal communication of two elements, indirect communication or interaction between two elements.

[0043] In the description of the present application, it should be pointed out that several meanings are one or more, and multiple (or multiple) meanings are more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If there is a description of "first", "second", etc. is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0044] The embodiments of the present application are further described below in combination with the drawings.

[0045] Reference Figures 1 to 4 , Figure 1As shown in FIG. 1, the furnace head body 100 is provided with a combustion channel 150 for placing a burner, and a plurality of air holes 110 arranged uniformly around the outlet of the combustion channel 150, wherein the mixed gas sprayed from the burner is combusted at the outlet of the combustion channel 150 and the extension line of the combustion channel 150. The inside of the air hole 110 or the outlet of the air hole 110 is provided with a wind guide structure 120, which is arranged to guide the wind blown from the air hole 110 to the outlet of the combustion channel 150 / the extension line of the combustion channel 150. The air hole 110 is arranged at the outlet of the combustion channel 150, which can make the fuel and air mixing more uniform, and the fuel combustion more sufficient. The uniformly arranged air holes 110 can improve the efficiency of air charging, and more air can be input in a short time. The air hole 110 can also guide the direction of flame combustion. The wind guide structure 120 can more accurately control the direction of the wind blown from the air hole 110, thereby improving the fuel combustion and reducing the emission of greenhouse gases.

[0046] The wind guide structure 120 is a wind guide ring 130 arranged at the outlet of the air hole 110, which is annularly arranged outside the air hole 110. The wind guide ring 130 is provided with an annular wind guide slope, which is inclined toward the outlet of the combustion channel 150 / the extension line of the combustion channel 150. The annular wind guide slope can make the air and fuel mixing more uniform, and the wind guide ring 130 can guide the direction of the mixed gas flow, thereby more fully utilizing the heat of the fuel. The annularly arranged air hole 110 can avoid the fuel deposition at the bottom of the combustion chamber.

[0047] The wind guide structure 120 is a wind guide section 140 arranged inside the air hole 110, which is inclined toward the outlet of the combustion channel 150 / the extension line of the combustion channel 150. The wind guide section 140 is arranged with a certain inclination, which can make the wind blown from the air hole more concentrated, thereby better controlling the direction of the wind blown.

[0048] Referring to Figures 4 to 8According to the second aspect of the present application, the energy-saving furnace head is applied to the crucible furnace, so that the combustion efficiency of the crucible furnace is improved, fuel is saved, the thermal efficiency of the crucible furnace is improved, the combustion state of the crucible furnace is optimized by cooperation of the air exchange mechanism 210 and the combustion device, fuel combustion is more sufficient, the emission of greenhouse gases is reduced, the generation amount of nitrogen oxides in the furnace is reduced, the direction of fuel delivery is better guided by the air duct, fuel is uniformly distributed at the bottom of the crucible 200 during combustion, fuel is more fully utilized, and the crucible 200 is heated faster.

[0049] The energy-saving furnace head comprises a first furnace head 300 and a second furnace head 310, the first furnace head 300 and the second furnace head 310 are separately arranged at different positions of the heating cavity, and the first furnace head 300 and the second furnace head 310 are respectively provided with a burner; the air duct comprises a first air duct 320 and a second air duct 330, the first air duct 320 is connected to the first furnace head 300, and the second air duct 330 is connected to the second furnace head 310. The first air duct 320 and the second air duct 330 can guide the direction of fuel, so as to improve the utilization efficiency of fuel and the heating speed.

[0050] The air exchange mechanism 210 comprises an air inlet channel and a smoke exhaust channel, and a four-way switching valve 220 is arranged on the air exchange mechanism 210, which is connected with the first air duct 320, the second air duct 330, the air inlet channel and the smoke exhaust channel respectively. When the four-way switching valve 220 is in the first state, the first air duct 320 and the air inlet channel are communicated, and the second air duct 330 and the smoke exhaust channel are communicated. When the four-way switching valve 220 is switched to the second state, the first air duct 320 and the smoke exhaust channel are communicated, and the second air duct 330 and the air inlet channel are communicated. The access state of the first air duct 320 and the second air duct 330 is changed by using the four-way switching valve 220, so that the first air duct 320 and the second air duct 330 can be switched between the air inlet state and the smoke exhaust state to adapt to different use environments. In some embodiments, a fan is connected with the air inlet 340, which sends the air outside into the air exchange mechanism 210 through the air inlet 340. The air exchange mechanism 210 is connected with the four-way switching valve 220. In the first state, the first air duct 320 and the air inlet 340 are communicated, and the air outside enters the heating cavity through the first air duct 320. After the air is mixed with fuel and burns, the exhaust gas is discharged from the second air duct 330. In the second state, the second air duct 330 is communicated with the air inlet 340, and the air outside enters the second air duct 330 after passing through the four-way switching valve 220. The air outside enters the heating cavity through the second air duct 330. After the air is mixed with fuel and burns, the exhaust gas is discharged from the first air duct 320.

[0051] In some embodiments, the bottom of the crucible 200 is provided with a support plate, the shape of the support plate matches the size and shape of the crucible 200, and the crucible 200 is installed on the support plate. When the crucible furnace is heated, the burner sends fuel into the heating cavity, the fuel mixes with the air outside when passing through the air hole 110, and then burns in the heating cavity. The burner is uniformly provided with a plurality of air holes 110 on the outside in the circumferential direction, which can efficiently mix air and fuel, and can ensure that the fuel is uniformly distributed in the heating cavity, so that the heating of the crucible 200 is more uniform.

[0052] The first air duct 320 and the second air duct 330 are provided with heat storage devices. The heat storage devices can recycle the waste heat generated during the operation of the crucible furnace. When the crucible furnace switches the air inlet channel, the heat storage devices can release heat to preheat the air. The preheated air can make the temperature of the crucible furnace burning higher, so as to avoid the lower temperature of the air outside reducing the temperature in the crucible furnace, thereby improving the working efficiency of the crucible furnace and saving the time required for the crucible furnace to reach the corresponding temperature. By switching the working state of the first air duct 320 and the second air duct 330 through the four-way switching valve 220, the heat storage devices can be used to recycle the heat of the exhaust gas, and the waste heat can be used for preheating the air to improve the temperature of the air, so that the fuel can be burned more fully.

[0053] The heat storage device is a honeycomb heat storage brick 400. The heat storage brick 400 can absorb waste gas heat for reuse, realize repeated use of heat, help reduce gas combustion, thereby saving gas and increasing enterprise benefits.

[0054] The first air duct 320 and the second air duct 330 are coated with a heat preservation layer. The heat preservation layer can prevent heat loss of the first air duct 320 and the second air duct 330, and can ensure the temperature of the air inlet. The fan is connected to the air inlet channel. The fan can be used for air supply, which can improve the air supply efficiency and ensure that the fuel and air can be fully mixed.

[0055] The above is a specific description of the preferred embodiment of the present application, but the present application is not limited to the above-mentioned embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are included in the scope defined by the claims of the present application.

Claims

1. A crucible furnace characterized by comprising: The energy-saving burner head comprises a burner head body, a combustion channel for placing a burner, and a plurality of air holes arranged uniformly around the outlet of the combustion channel, wherein mixed gas emitted from the burner burns at the outlet of the combustion channel and the extension line of the combustion channel, and a wind guide structure is arranged at the inside of the air hole or the outlet of the air hole, and the wind guide structure is arranged to guide the air blown from the air hole to the outlet of the combustion channel or the extension line of the combustion channel. The crucible furnace further comprises: a furnace body, wherein a heating cavity is arranged in the furnace body; a crucible arranged in the furnace body, wherein one end of the crucible is arranged in the heating cavity; the energy-saving burner head is arranged in the furnace body, and the outlet of the combustion channel of the energy-saving burner head is communicated with the heating cavity; a combustion device comprising a burner arranged in the combustion channel of the energy-saving burner head; an air exchange mechanism comprising a fan and an air duct, wherein the air duct is connected with the energy-saving burner head, and air flow flows between the air duct and the heating cavity through the air holes on the energy-saving burner head; the energy-saving burner head comprises a first burner head and a second burner head, wherein the first burner head and the second burner head are arranged separately at different positions of the heating cavity, and the first burner head and the second burner head are respectively provided with the burner; the air duct comprises a first air duct and a second air duct, wherein the first air duct is connected with the first burner head, and the second air duct is connected with the second burner head, and the first air duct and the second air duct are provided with heat storage devices, wherein the heat storage devices are honeycomb-shaped heat storage bricks, and the first air duct and the second air duct are coated with a heat preservation layer; the air exchange mechanism comprises an air inlet channel and an exhaust channel, and a four-way switch valve is arranged on the air exchange mechanism, wherein the four-way switch valve is connected with the first air duct, the second air duct, the air inlet channel and the exhaust channel respectively; when the four-way switch valve is in a first state, the first air duct and the air inlet channel are communicated, and the second air duct and the exhaust channel are communicated; when the four-way switch valve is switched to a second state, the first air duct and the exhaust channel are communicated, and the second air duct and the air inlet channel are communicated.

2. The crucible furnace of claim 1, wherein the wind guide structure is a wind guide ring arranged at the outlet of the air hole, wherein the wind guide ring is annularly arranged outside the air hole, and an annular wind guide slope is arranged on the wind guide ring, and the wind guide slope is inclined towards the outlet of the combustion channel or the extension line of the combustion channel.

3. The crucible furnace of claim 1, wherein the wind guide structure is a wind guide section arranged inside the air hole, and the wind guide section is inclined towards the outlet of the combustion channel or the extension line of the combustion channel.

4. The crucible furnace of claim 1, wherein the fan is connected with the air inlet channel.

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