Reduction furnace tail gas waste heat drying device

Abstract

The utility model relates to a reduction furnace tail gas waste heat drying device, which relates to the technical field of ore drying, and comprises a base, a box body is arranged above the base, the bottom of the box body is provided with an opening, a material conveying assembly is arranged between the box body and the base, and the material conveying assembly is used for feeding and discharging the box body through the opening. An air inlet pipe and an air outlet pipe are arranged on the box body in a communicating mode, a temperature sensor is arranged on the air inlet pipe and used for detecting the air temperature in the air inlet pipe, a waste heat pipe and a cooling pipe are arranged at the end, away from the box body, of the air inlet pipe in a communicating mode, and an electromagnetic valve is arranged on the cooling pipe. The ore drying device has the effect of reducing the electricity consumption for ore drying.

Description

Technical Field

[0001] The utility model relates to the technical field of ore drying, in particular to a drying device for the waste heat of the tail gas of a reduction furnace. Background Art

[0002] In the process of ore processing, ore roasting reduction is an important link in the production process flow. Since there is a large amount of moisture in the ore raw materials, and too much moisture content is not conducive to the roasting reduction process, which will not only lead to a reduction in the reduction effect, but also cause a large amount of heat loss and an increase in energy consumption. Therefore, before the ore raw materials enter the roasting reduction system, they need to be dried to effectively remove the moisture in the ore, improve the dryness of the ore, and facilitate the ore processing technology.

[0003] A Chinese patent with the authorization announcement number of CN209558860U in the related technology provides an ore detection raw material drying device with high drying efficiency, which includes a drying box. The drying box is provided with a feed inlet, a discharge outlet and heat dissipation holes. A fan is installed on the top of the drying box. The air inlet of the fan is connected with an air inlet pipe, and the air outlet of the fan is connected with an air outlet pipe. The air outlet pipe is communicated with the inner cavity of the drying box, and an electric heating wire is installed in the inner cavity of the drying box. The ore to be dried is put into the drying box through the feed inlet, and the ore in the drying box moves from the feed inlet to the discharge outlet. During the movement of the ore, the fan is started to introduce air into the drying box to air-dry the ore, and the electric heating wire is energized to generate heat to heat and dry the ore raw materials, so as to achieve the effect of drying the ore.

[0004] In the process of implementing the present application, the inventor found that there are at least the following problems in this technology: during the drying process of the ore raw materials, the electric heating wire continuously works to convert electrical energy into heat energy, so that the moisture in the ore quickly volatilizes, resulting in a large amount of electrical energy consumption during the ore drying process. Summary of the Utility Model

[0005] In order to reduce the power consumption of ore drying, the present application provides a drying device for the waste heat of the tail gas of a reduction furnace.

[0006] The drying device for the waste heat of the tail gas of a reduction furnace provided by the present application adopts the following technical solutions:

[0007] A drying device for the waste heat of the tail gas of a reduction furnace includes a base. A box body is arranged above the base. An open mouth is formed at the bottom of the box body. A feeding and discharging assembly is arranged between the box body and the base. The feeding and discharging assembly is used for feeding and discharging materials into and out of the box body through the open mouth. An air inlet pipe and an air outlet pipe are communicated with the box body. A temperature sensor is arranged on the air inlet pipe. The temperature sensor is used for detecting the temperature of the air in the air inlet pipe. The end of the air inlet pipe far away from the box body is communicated with a waste heat pipe and a cooling pipe. A solenoid valve is arranged on the cooling pipe.

[0008] By adopting the above technical solution, the waste heat pipe is connected to the high-temperature tail gas outlet of the reduction furnace, and the cooling pipe is connected to the low-temperature nitrogen source. The high-temperature tail gas in the reduction furnace is introduced into the intake pipe through the waste heat pipe. The temperature sensor in the intake pipe detects the air temperature in the intake pipe. When the temperature exceeds 110 °C, the solenoid valve opens, allowing the low-temperature nitrogen to be introduced into the intake pipe through the cooling pipe, thereby reducing the air temperature in the intake pipe. When the temperature is lower than 100 °C, the solenoid valve closes, so that the air temperature in the intake pipe is always controlled between 100 °C and 110 °C. When drying the ore raw materials, the feeding assembly feeds the ore raw materials into the box from the open end. The hot gas in the intake pipe is introduced into the box to stably heat and dry the ore raw materials. The humid hot gas in the box is discharged from the outlet pipe. By using the heat of the reduction furnace tail gas, it replaces the original way of using electric heating wires to generate heat with electric energy, thereby reducing the large amount of electric energy consumed during the ore drying process and achieving the effect of reducing the electricity consumption for ore drying.

[0009] Preferably, the feeding assembly includes an electric push rod and a push plate. The electric push rod is fixedly arranged on the base. The output shaft of the electric push rod is fixedly connected to the bottom of the push plate. The push plate is located directly below the open end. The width of the push plate is equal to the width of the open end, and the length of the push plate is less than the length of the open end.

[0010] By adopting the above technical solution, the ore raw materials to be dried are placed above the push plate. The output shaft of the electric push rod extends, driving the ore raw materials to be dried to enter the box from the open end. After the ore raw materials are dried in the oven, the output shaft of the electric push rod shortens, moving the dried ore raw materials out of the box from the open end, achieving the effect of loading and unloading the ore raw materials.

[0011] Preferably, the feeding assembly further includes a plurality of trays, a left support and a right support. The left support and the right support are symmetrically arranged on both sides of the push plate. The left support and the right support are both fixedly arranged on the base. The trays are jointly slidably arranged on the left support and the right support. The width of the trays is equal to the width of the open end, and the length of the trays is equal to the length of the open end. The bottom of the trays is used to abut against the top of the push plate.

[0012] By adopting the above technical solution, the trays slide on the left support and the right support for transmission. The ore raw materials to be dried are arranged on the trays in sequence. When the tray moves below the box, the output shaft of the electric push rod extends to drive the push plate to move upward. The push plate drives the trays to move upward, closing the open end with the trays. At this time, the ore raw materials to be dried are in the box for drying. After the ore raw materials are dried in the oven, the output shaft of the electric push rod shortens to drive the push plate to descend. The trays descend synchronously with the push plate, moving the dried ore raw materials out of the box from the open end. When the trays descend onto the left support and the right support, the trays move away from below the box, and at the same time, another tray with the ore raw materials to be dried moves below the box.

[0013] Preferably, a left conveyor roller and a plurality of left support rollers are rotatably arranged on the left bracket. A left conveyor belt is sleeved on the left conveyor roller and the left support rollers together. A right conveyor roller and a plurality of right support rollers are rotatably arranged on the right bracket. A right conveyor belt is sleeved on the right conveyor roller and the right support rollers together. The trays are jointly arranged on the left conveyor belt and the right conveyor belt.

[0014] By adopting the above technical solution, when the left conveyor roller and the right conveyor roller rotate synchronously, the left conveyor belt and the right conveyor belt rotate synchronously. Thus, the left conveyor belt and the right conveyor belt drive the trays to move, achieving the effect of moving the trays below the box body.

[0015] Preferably, a driving motor is fixedly arranged on the left bracket. The output shaft of the driving motor is fixedly connected to one end of the left conveyor roller. A driving roller is fixedly arranged between the other end of the left conveyor roller and the right conveyor roller. The left conveyor roller, the right conveyor roller and the driving roller are coaxially arranged.

[0016] By adopting the above technical solution, when the driving motor starts, it drives the left conveyor roller to rotate. The left conveyor roller drives the driving roller to rotate. The driving roller drives the right conveyor roller to rotate, thereby making the left conveyor roller and the right conveyor roller rotate synchronously.

[0017] Preferably, photoelectric sensors are fixedly arranged on both the left bracket and the right bracket. The photoelectric sensors are used to detect the positions of the trays.

[0018] By adopting the above technical solution, during the normal operation of the driving motor, when the photoelectric sensors detect the trays, the driving motor stops, so that a tray is stationary and waiting below the open mouth of the box body.

[0019] Preferably, limit plates are fixedly arranged on both the left bracket and the right bracket. The opposite surfaces of the limit plates are attached to the end walls of the trays.

[0020] By adopting the above technical solution, during the movement of the trays along the left support and the right support, the opposite surfaces of the limit plates are attached to the end walls of the trays, thereby the limit plates restricting the trays from shifting.

[0021] Preferably, positioning blocks are fixedly arranged on the top of the push plate. Positioning grooves are formed at the bottom of the trays for the positioning blocks to be inserted into.

[0022] By adopting the above technical solution, when the push plate drives the trays to move upward, the positioning blocks on the push plate are inserted into the positioning grooves at the bottom of the trays, making it difficult for the trays to fall off the push plate.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting a base, a box body, an open mouth, a feeding component, an air inlet pipe, an air outlet pipe, a temperature sensor, a waste heat pipe, a cooling pipe and a solenoid valve, and by using the heat of the tail gas of the reduction furnace to replace the original way of using an electric heating wire to generate heat with electric energy, the situation of consuming a large amount of electric energy during the ore drying process can be reduced, and the effect of reducing the electric energy consumption for ore drying can be achieved;

[0025] 2. By setting a tray, a left support, a right support, an electric push rod and a push plate, the effects of loading and unloading the ore raw materials can be realized;

[0026] 3. By setting a positioning block and a positioning groove, the tray is not easily dropped from the push plate. Brief Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a reduction furnace tail gas waste heat drying device in an embodiment of the present application.

[0028] Figure 2 is a cross-sectional view showing the positional relationship between the box body and the open mouth in an embodiment of the present application.

[0029] Figure 3 is a cross-sectional view showing the connection relationship between the left input roller and the right input roller in an embodiment of the present application.

[0030] Figure 4 is a cross-sectional view showing the positional relationship between the left support roller and the right support roller in an embodiment of the present application.

[0031] Figure 5 is Figure 4 an enlarged view of part A in

[0032] Figure 6 is Figure 4 an enlarged view of part B in

[0033] Description of the Reference Numerals: 1, base; 2, box body; 21, open mouth; 3, air outlet pipe; 4, air inlet pipe; 41, temperature sensor; 5, waste heat pipe; 6, cooling pipe; 61, solenoid valve; 7, feeding component; 71, electric push rod; 72, push plate; 73, left support; 74, right support; 75, tray; 8, drive motor; 81, drive roller; 82, left conveying roller; 821, left support roller; 822, left conveyor belt; 83, right conveying roller; 831, right support roller; 832, right conveyor belt; 84, photoelectric sensor; 9, limit plate; 91, positioning block; 92, positioning groove. Detailed Description of the Embodiment

[0034] The following is a further detailed description of the present application in conjunction with the attached Figures 1-6 drawings.

[0035] An embodiment of the present application discloses a reduction furnace tail gas waste heat drying device. Refer toFigure 1 and Figure 2 , including a base 1. Above the base 1, a box body 2 is installed through a steel structure. An open mouth 21 is formed at the bottom of the box body 2. A feeding and discharging assembly 7 is installed between the box body 2 and the base 1. The feeding and discharging assembly 7 is used for feeding and discharging the box body 2 through the open mouth 21. An air outlet pipe 3 is communicated and arranged on one side of the box body 2, and an air inlet pipe 4 is communicated and arranged at the top of the box body 2. A temperature sensor 41 is installed in the air inlet pipe 4. The temperature sensor 41 is used for detecting the air temperature in the air inlet pipe 4. One end of the air inlet pipe 4 far away from the box body 2 is communicated with a waste heat pipe 5 and a cooling pipe 6. The waste heat pipe 5 is connected to the high-temperature tail gas outlet of the reduction furnace, and the cooling pipe 6 is connected to a low-temperature nitrogen source. An electromagnetic valve 61 is arranged on the cooling pipe 6. The high-temperature tail gas in the reduction furnace is introduced into the air inlet pipe 4 through the waste heat pipe 5, and the temperature sensor 41 in the air inlet pipe 4 detects the air temperature in the air inlet pipe 4. When the temperature exceeds 110 °C, the electromagnetic valve 61 is opened, so that low-temperature nitrogen is introduced into the air inlet pipe 4 through the cooling pipe 6, thereby reducing the air temperature in the air inlet pipe 4; when the temperature is lower than 100 °C, the electromagnetic valve 61 is closed, so that the air temperature in the air inlet pipe 4 is always controlled between 100 °C and 110 °C. When drying the ore raw materials, the feeding and discharging assembly 7 sends the ore raw materials into the box body 2 through the open mouth 21, and the hot gas in the air inlet pipe 4 is introduced into the box body 2 to stably heat and air-dry the ore raw materials. The humid and hot gas in the box body 2 is discharged from the box body 2 through the air outlet pipe 3. By using the heat of the tail gas of the reduction furnace, the original method of using an electric heating wire to generate heat by using electric energy is replaced, so as to reduce the situation that a large amount of electric energy needs to be consumed during the ore drying process, and achieve the effect of reducing the power consumption for ore drying.

[0036] To achieve the effect of feeding and discharging the ore raw materials, refer to Figures 1 to 4, the material feeding assembly 7 includes a plurality of trays 75, a left bracket 73, a right bracket 74, an electric push rod 71 and a push plate 72. The electric push rod 71, the left bracket 73 and the right bracket 74 are all welded to the base 1, and the left bracket 73 and the right bracket 74 are symmetrically arranged on both sides of the push plate 72. The output shaft of the electric push rod 71 is welded to the bottom of the push plate 72, and the push plate 72 is located directly below the open end 21. The width of the push plate 72 is equal to the width of the open end 21, and the length of the push plate 72 is less than the length of the open end 21. The trays 75 are jointly slidably arranged on the left bracket 73 and the right bracket 74. The width of the trays 75 is equal to the width of the open end 21, and the length of the trays 75 is equal to the length of the open end 21. The bottom of the trays 75 is used to abut against the top of the push plate 72. The trays 75 slide on the left bracket 73 and the right bracket 74 for transmission, and the ore raw materials to be dried are arranged on the trays 75 in sequence. When the tray 75 moves below the box body 2, the output shaft of the electric push rod 71 extends to drive the push plate 72 to move upward, and the push plate 72 drives the tray 75 to move upward. The tray 75 closes the open end 21. At this time, the ore raw materials to be dried are located inside the box body 2 for drying. After the ore raw materials are dried in the oven, the output shaft of the electric push rod 71 shortens to drive the push plate 72 to descend, and the tray 75 descends synchronously with the push plate 72, and the dried ore raw materials are removed from the box body 2 through the open end 21. When the tray 75 descends onto the left bracket 73 and the right bracket 74, the tray 75 is moved away from below the box body 2. At the same time, another tray 75 placed with the raw materials to be dried moves below the box body 2, realizing the effects of feeding and discharging the ore raw materials.

[0037] In order to enable the trays 75 to be transmitted on the left bracket 73 and the right bracket 74, refer to Figures 1 to 6, a left conveyor roller 82 and several left supporting rollers 821 are rotatably arranged on the left support 73, and a left conveyor belt 822 is sleeved on the left conveyor roller 82 and the left supporting rollers 821 together. A right conveyor roller 83 and several right supporting rollers 831 are rotatably arranged on the right support 74, and a right conveyor belt 832 is sleeved on the right conveyor roller 83 and the right supporting rollers 831 together. The tray 75 is jointly carried on the left conveyor belt 822 and the right conveyor belt 832. Photoelectric sensors 84 are installed on both the left support 73 and the right support 74, and the photoelectric sensors 84 are used to detect the position of the tray 75. A driving motor 8 is installed on the left support 73, and the output shaft of the driving motor 8 is welded to one end of the left conveyor roller 82. A driving roller 81 is welded between the other end of the left conveyor roller 82 and the right conveyor roller 83. The left conveyor roller 82, the right conveyor roller 83 and the driving roller 81 are coaxially arranged. When the driving motor 8 is started, it drives the left conveyor roller 82 to rotate. The left conveyor roller 82 drives the driving roller 81 to rotate, and the driving roller 81 drives the right conveyor roller 83 to rotate, so that the left conveyor roller 82 and the right conveyor roller 83 rotate synchronously. When the left conveyor roller 82 and the right conveyor roller 83 rotate synchronously, the left conveyor belt 822 and the right conveyor belt 832 rotate synchronously, so that the left conveyor belt 822 and the right conveyor belt 832 drive the tray 75 to move. During the normal operation of the driving motor 8, when the photoelectric sensor 84 detects the tray 75, the driving motor 8 stops, so that there is a tray 75 stationary waiting below the opening 21 of the box body 2.

[0038] Refer to Figures 4 to 6 , limit plates 9 are installed on both the left support 73 and the right support 74, and the opposite surfaces of the limit plates 9 are attached to the end walls of the tray 75. During the movement of the tray 75 along the left support and the right support, the opposite surfaces of the limit plates 9 are attached to the end walls of the tray 75, so that the limit plates 9 limit the situation where the tray 75 deviates.

[0039] Refer to Figure 2 and Figure 4 , a positioning block 91 is installed at the top of the push plate 72, and a positioning groove 92 is opened at the bottom of the tray 75. The positioning groove 92 is for the positioning block 91 to be inserted. When the push plate 72 drives the tray 75 to move upward, the positioning block 91 on the push plate 72 is inserted into the positioning groove 92 at the bottom of the tray 75, so that the tray 75 is not easily dropped from the push plate 72.

[0040] The implementation principle of the waste heat drying device for the tail gas of the reduction furnace in the embodiment of the present application is as follows: The high-temperature tail gas in the reduction furnace enters the intake pipe 4 through the waste heat pipe 5, and the temperature sensor 41 in the intake pipe 4 detects the temperature of the gas in the intake pipe 4. When the temperature exceeds 110 °C, the solenoid valve 61 opens, allowing low-temperature nitrogen to enter the intake pipe 4 through the cooling pipe 6, thereby reducing the temperature of the gas in the intake pipe 4; when the temperature is lower than 100 °C, the solenoid valve 61 closes, so that the temperature of the gas in the intake pipe 4 is always controlled between 100 °C and 110 °C. When drying the ore raw materials, the ore raw materials to be dried are arranged on the tray 75 in sequence, and the driving motor 8 drives the left conveyor belt 822 and the right conveyor belt 832 to move synchronously. The left conveyor belt 822 and the right conveyor belt 832 drive the tray 75 to move. During the normal operation of the driving motor 8, when the photoelectric sensor 84 detects the appearance of the tray 75, the driving motor 8 stops. At this time, there is a tray 75 waiting statically below the open mouth 21 of the box body 2. Then the output shaft of the electric push rod 71 extends to drive the push plate 72 to move upward, and the push plate 72 drives the tray 75 to move upward, and the tray 75 closes the open mouth 21. At this time, the ore raw materials to be dried are located in the box body 2, and the hot gas in the intake pipe 4 is introduced into the box body 2 to stably heat and dry the ore raw materials, and the humid and hot gas in the box body 2 is discharged from the box body 2 through the air outlet pipe 3. When the ore raw materials are dried in the oven, the output shaft of the electric push rod 71 shortens to drive the push plate 72 to descend, and the tray 75 descends synchronously with the push plate 72, and the dried ore raw materials are removed from the box body 2 through the open mouth 21. When the tray 75 descends onto the left support 73 and the right support 74, the driving motor 8 starts again. Until the photoelectric sensor 84 detects the next tray 75, the driving motor 8 stops, and so on in a cycle to dry the ore raw materials. By using the waste heat of the reduction furnace tail gas, it replaces the original way of using electric energy for heating by the electric heating wire, thereby reducing the situation that a large amount of electric energy needs to be consumed during the ore drying process, and achieving the effect of reducing the power consumption for ore drying.

[0041] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A waste heat drying device for the tail gas of a reduction furnace, comprising a base (1), and a box body (2) is arranged above the base (1), characterized in that: An opening (21) is formed at the bottom of the box body (2). A feeding component (7) is arranged between the box body (2) and the base (1). The feeding component (7) is used for feeding and discharging the box body (2) through the opening (21). An air inlet pipe (4) and an air outlet pipe (3) are connected to the box body (2). A temperature sensor (41) is arranged on the air inlet pipe (4). The temperature sensor (41) is used for detecting the air temperature in the air inlet pipe (4). The end of the air inlet pipe (4) far from the box body (2) is connected to a waste heat pipe (5) and a cooling pipe (6). A solenoid valve (61) is arranged on the cooling pipe (6).

2. The waste heat drying device for the reducing furnace tail gas according to claim 1, characterized in that: The feeding component (7) includes an electric push rod (71) and a push plate (72). The electric push rod (71) is fixedly arranged on the base (1). The output shaft of the electric push rod (71) is fixedly connected to the bottom of the push plate (72). The push plate (72) is located directly below the opening (21). The width of the push plate (72) is equal to the width of the opening (21). The length of the push plate (72) is less than the length of the opening (21).

3. The waste heat drying device for the reducing furnace tail gas according to claim 2, characterized in that: The feeding component (7) further includes a plurality of trays (75), a left support (73) and a right support (74). The left support (73) and the right support (74) are symmetrically arranged on both sides of the push plate (72). The left support (73) and the right support (74) are both fixedly arranged on the base (1). The trays (75) are jointly slidably arranged on the left support (73) and the right support (74). The width of the trays (75) is equal to the width of the opening (21). The length of the trays (75) is equal to the length of the opening (21). The bottom of the trays (75) is used for abutting against the top of the push plate (72).

4. The waste heat drying device for the tail gas of a reduction furnace according to claim 3, wherein: A left conveying roller (82) and a plurality of left supporting rollers (821) are rotatably arranged on the left support (73). A left conveyor belt (822) is jointly sleeved on the left conveying roller (82) and the left supporting rollers (821). A right conveying roller (83) and a plurality of right supporting rollers (831) are rotatably arranged on the right support (74). A right conveyor belt (832) is jointly sleeved on the right conveying roller (83) and the right supporting rollers (831). The trays (75) are jointly arranged on the left conveyor belt (822) and the right conveyor belt (832).

5. The waste heat drying device for the tail gas of a reduction furnace according to claim 4, wherein: A driving motor (8) is fixedly arranged on the left support (73). The output shaft of the driving motor (8) is fixedly connected to one end of the left conveying roller (82). A driving roller (81) is fixedly arranged between the other end of the left conveying roller (82) and the right conveying roller (83). The left conveying roller (82), the right conveying roller (83) and the driving roller (81) are coaxially arranged.

6. The waste heat drying device for the reducing furnace tail gas according to claim 5, wherein: Photoelectric sensors (84) are fixedly arranged on both the left support (73) and the right support (74). The photoelectric sensors (84) are used for detecting the position of the trays (75).

7. The waste heat drying device for the reducing furnace tail gas according to claim 3, wherein: Limit plates (9) are fixedly arranged on both the left support (73) and the right support (74). The opposite surfaces of the limit plates (9) are attached to the end walls of the trays (75).

8. The waste heat drying device for the reduction furnace tail gas according to claim 3, wherein: A positioning block (91) is fixedly arranged at the top of the push plate (72), and a positioning groove (92) is formed at the bottom of the tray (75), and the positioning block (91) is inserted into the positioning groove (92).

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