A flow guiding device and method for a low-temperature chlorination furnace

Abstract

This invention discloses a flow guiding device and method for a low-temperature chlorination furnace. The flow guiding device includes an information collection unit and a vibration assembly. The information collection unit collects temperature signals at different locations within the fluidized bed distribution area of ​​the low-temperature chlorination furnace. The vibration assembly includes a vibration guide tube and a vibration control unit. The vibration control unit is located on the top outer side of the low-temperature chlorination furnace. An eccentric vibration shaft is installed inside the vibration guide tube. The top end of the eccentric vibration shaft is connected to the vibration control unit, and the bottom end of the eccentric vibration shaft extends to the fluidized bed and can move within the fluidized bed. This low-temperature chlorination furnace flow guiding device can promptly perform vibration and flow guiding when a fluidization dead zone occurs in the fluidized bed of the low-temperature chlorination furnace, restoring the normal fluidization state, avoiding localized high temperatures, and significantly improving the Ti recovery efficiency of the low-temperature chlorination furnace.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, specifically to a flow guiding device and method for a low-temperature chlorination furnace. Background Technology

[0002] The vanadium-titanium iron concentrate produced in the Panxi region contains a certain amount of TiO2, which is discarded as blast furnace slag after blast furnace smelting and cannot be fully utilized, which greatly affects the comprehensive utilization efficiency of titanium resources in the vanadium-titanium magnetite in the Panxi region.

[0003] To improve the comprehensive utilization efficiency of vanadium-titanium magnetite, researchers have conducted extensive studies on titanium extraction technology from blast furnace slag. Currently, the main methods for recovering titanium from vanadium-titanium magnetite include high-temperature carbonization reduction and low-temperature selective chlorination of blast furnace slag to generate TiCl4, which can effectively extract Ti from blast furnace slag. The high-temperature carbonization reduction process is currently operating stably, with the TiO2 reduction rate in the slag consistently controlled above 85%, showing good results. However, the low-temperature selective chlorination method is not performing well, with a low overall TiO2 chlorination efficiency of only 60%–70%, severely impacting Ti recovery efficiency. Analysis reveals the following main reasons: poor fluidization within the low-temperature chlorination furnace, excessively high local temperatures in the material bed, and the tendency for Ca and Mg chlorination to induce sintering and agglomeration. Dead zones within the fluidized bed also easily appear, severely affecting Ti recovery efficiency and, in severe cases, even leading to furnace shutdown.

[0004] Therefore, developing a flow guiding device for a low-temperature chlorination furnace, which can promptly rappel and guide the flow when a fluidization dead zone occurs in the fluidized bed of the low-temperature chlorination furnace, restore the normal fluidization state, avoid local high temperatures, and greatly improve the Ti recovery efficiency of the low-temperature chlorination furnace. Summary of the Invention

[0005] The purpose of this invention is to provide a flow guiding device and method for a low-temperature chlorination furnace. The device is equipped with a vibrating ball, which can be moved to an area with abnormal temperature to vibrate and guide the flow. This can reactivate the fluidized bed, eliminate dead zones inside the fluidized bed, inhibit Ca and Mg chlorination, effectively improve the fluidization state in the low-temperature chlorination furnace, and rationally channel the heat accumulated due to agglomeration, so that the carbonized blast furnace slag can be fully and uniformly mixed with chlorine gas, thereby improving the Ti recovery and utilization efficiency.

[0006] To achieve the above-mentioned objectives, the present invention provides a low-temperature chlorination furnace flow guiding device, comprising an information collection unit and a vibration component;

[0007] The information collection unit is used to collect temperature information at different locations in the fluidized bed distribution area of ​​the low-temperature chlorination furnace.

[0008] The vibration assembly includes a vibration guide tube and a vibration control unit. The vibration control unit is located on the top outer side of the low-temperature chlorination furnace. An eccentric vibration shaft is provided inside the vibration guide tube. The top end of the eccentric vibration shaft is connected to the vibration control unit. The bottom end of the eccentric vibration shaft extends to the fluidized bed and can move in the fluidized bed.

[0009] In this invention, the information collection unit is used to collect the temperature at different locations in the fluidized bed distribution area of ​​the low-temperature chlorination furnace. When an abnormal temperature signal is collected (e.g., abnormally high temperature), it indicates that the fluidization effect at that location may be poor, easily leading to sintering and agglomeration induced by Ca and Mg chlorination, or even the formation of fluidization dead zones. In severe cases, this can cause the low-temperature chlorination furnace to cool down and shut down. At this time, the bottom end of the eccentric vibrating shaft is moved to the location of the abnormal signal for vibration and flow guidance. Under the vibration action, the temperature of the locally agglomerated and sintered calcium chloride, magnesium, and other substances has not completely decreased, making them easily broken up and refined, and they re-participate in the fluidization state. At the same time, it makes the material mixing in this area more uniform, thereby improving the Ti recovery efficiency.

[0010] In this invention, the bottom end of the eccentric vibrating shaft is the vibrating section, which can be any form of vibrating section in the prior art. Preferably, the movement of the bottom end of the eccentric vibrating shaft can be achieved by manual operation or intelligent operation by a controller. More preferably, the bottom end of the eccentric vibrating shaft extends to the fluidized bed and can move within the fluidized bed, including vertical movement and rotation within the same horizontal plane, thereby enabling the bottom end of the eccentric vibrating shaft to reach any point in the fluidized bed.

[0011] According to the present invention, a low-temperature chlorination furnace flow guiding device preferably includes a vibrating ball at the bottom end of the eccentric vibrating shaft; the vibrating guide tube also includes an inlet channel and an outlet channel, the bottom ends of which communicate with the vibrating ball, the top end of which connects to an inlet pipe, and the top end of which connects to an outlet pipe. In this invention, the inlet channel, vibrating ball, and outlet channel allow coolant, such as circulating water, to circulate through external inlet and outlet pipes, enabling heat exchange at locally high-temperature locations during vibration, effectively dissipating excess heat and improving the Ti conversion efficiency.

[0012] According to the present invention, a low-temperature chlorination furnace flow guiding device preferably further includes a coolant storage tank, wherein a delivery pump is provided in the coolant storage tank, the inlet pipe is connected to the outlet of the delivery pump, and the outlet pipe is connected to the coolant storage tank.

[0013] According to the present invention, a flow guiding device for a low-temperature chlorination furnace is preferably provided with a vibration mounting base at the top of the low-temperature chlorination furnace, and the middle part of the vibration guide tube is connected to the top of the low-temperature chlorination furnace through the vibration mounting base. The vibration guide tube and the vibration mounting base are movably connected. In this invention, the movable connection between the vibration guide tube and the vibration mounting base allows the vibration guide tube to move up and down on the vibration mounting base and rotate around the vibration mounting base.

[0014] According to the present invention, a low-temperature chlorination furnace flow guiding device preferably includes an information collection unit comprising several temperature detectors, which are respectively located at different positions in the fluidized bed.

[0015] According to the low-temperature chlorination furnace flow guiding device of the present invention, preferably, the temperature detector is a thermocouple detector or a temperature sensor.

[0016] According to the present invention, in a low-temperature chlorination furnace flow guiding device, preferably, the vibration control unit is capable of controlling the bottom end of the eccentric vibration shaft to drive the vibration ball to move.

[0017] According to the present invention, a low-temperature chlorination furnace flow guiding device preferably further includes a central control system, which is connected to a vibration control unit, an information collection unit, and a delivery pump. In this invention, the information collection unit sends the collected signals to the central control system. After detecting an abnormal signal, the central control system sends commands to the vibration control unit and the delivery pump. The vibration control unit controls the bottom end of the eccentric vibration shaft to move the vibration ball to the location of the abnormal signal for vibration, and the delivery pump causes the coolant in the inlet channel, the vibration ball, and the outlet channel to flow for heat exchange, thus achieving automatic control.

[0018] According to the present invention, a low-temperature chlorination furnace flow guiding device preferably has a vibrating ball that can move up and down within a height range of 0-3.5m above the gas distribution plate of the fluidized bed, and can rotate 360° on the same horizontal plane above the gas distribution plate.

[0019] In the low-temperature chlorination furnace flow guiding device of the present invention, a temperature regulating valve is provided on the outlet pipe for detecting the temperature of the coolant in the outlet pipe. Preferably, the temperature regulating valve is signal-connected to the central control system. When the temperature detected by the temperature regulating valve is higher than a set threshold range, the central control system sends a command to the delivery pump to increase the coolant delivery rate; when the temperature is lower than the set threshold range, the central control system sends a command to the delivery pump to decrease the coolant delivery rate.

[0020] In addition, the present invention also provides an operating method for the above-mentioned low-temperature chlorination furnace flow guiding device, comprising the following steps:

[0021] Step (1): The information mobile phone unit detects the temperature signal in the material distribution area and sends it to the central control system. When the central control system receives a temperature anomaly, this temperature anomaly is determined to be the target location in the fluidized bed.

[0022] Step (2): The central control system sends a command to the vibratory control unit to move the vibratory ball to the target position;

[0023] Step (3): The central control system sends a command to the delivery pump to start the delivery pump, causing the coolant to flow in the inlet channel, the vibrating ball, and the outlet channel.

[0024] Step (4): Start the vibration control unit and let the vibration ball bladder vibrate and guide the flow at the target position. After the temperature returns to normal, send a signal to the central control system. The central control system sends a stop command to the delivery pump and the vibration control unit respectively, and retracts the vibration guide tube.

[0025] The beneficial effects of this invention are:

[0026] The present invention discloses a low-temperature chlorination furnace flow guiding device and method. The device includes a vibrating ball, which can be moved to areas of abnormal temperature for vibration flow guiding. This reactivates the fluidized bed, eliminates dead zones within the fluidized bed, inhibits Ca and Mg chlorination, effectively improves the fluidization state within the low-temperature chlorination furnace, and rationally dissipates heat accumulated due to agglomeration. This allows the carbonized blast furnace slag to be fully and uniformly mixed with chlorine gas, thereby improving Ti recovery efficiency. A more preferred embodiment of the present invention, through the arrangement of the vibrating ball and the inlet and outlet water channels, enables effective heat exchange during the vibration flow guiding process, carrying away excess heat through the coolant, further ensuring Ti conversion efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a low-temperature chlorination furnace flow guiding device according to the present invention.

[0029] Figure 2 This is a partially enlarged view of a low-temperature chlorination furnace flow guiding device according to the present invention.

[0030] Figure 3 This is a partial enlarged view of a low-temperature chlorination furnace flow guiding device according to the present invention, specifically a cross-sectional view at point AB.

[0031] Among them, 1-low temperature chlorination furnace, 2-vibration control unit, 3-vibration control unit, 4-vibration control unit, 5-coolant storage tank, 6-transfer pump, 7-inlet pipe, 8-outlet pipe, 9-vibration ball, 10-gas distribution plate, 11-material layer distribution area, 12-inlet channel, 13-outlet channel, 14-intermediate chamber. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0033] It should be noted that all uses of "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the present invention. Subsequent embodiments will not explain this in detail.

[0034] Example

[0035] like Figure 1-3 As shown in the figure, this embodiment of a low-temperature chlorination furnace flow guiding device has the following specific structure.

[0036] It includes an information collection unit and a vibration component.

[0037] The information collection unit includes 9-18 thermocouples evenly distributed in the material distribution area 11 above the gas distribution plate 10 of the fluidized bed in the low-temperature chlorination furnace 1, for collecting the temperature at different locations in the material distribution area 11 of the fluidized bed.

[0038] like Figure 2-3 As shown, the vibration assembly includes a three-chamber vibration guide tube 3 and a vibration control unit 2. The middle part of the three-chamber vibration guide tube 3 is installed on the top of the low-temperature chlorination furnace 1 via a vibration mounting base 4. The middle part of the three-chamber vibration guide tube 3 is movably connected to the vibration mounting base 4. An eccentric vibration shaft is provided in the middle chamber 14 of the three-chamber vibration guide tube 3. The two side chambers of the three-chamber vibration guide tube 3 are a water inlet channel 12 and a water outlet channel 13, respectively. A vibration ball 9 is provided at the bottom end of the eccentric vibration shaft. The vibration control unit 2 is installed at the top of the eccentric vibration shaft and is located on the outer side of the top of the low-temperature chlorination furnace 1. The bottom ends of the water inlet channel 12 and the water outlet channel 13 are connected to the vibration ball 9. The top end of the water inlet channel 12 is connected to the water inlet pipe 7, and the top end of the water outlet channel 13 is connected to the water outlet pipe 8.

[0039] The low-temperature chlorination furnace diversion device also includes a coolant storage tank 5, which is equipped with a transfer pump 6. The inlet pipe 7 is connected to the outlet of the transfer pump 6, and the outlet pipe 8 is connected to the coolant storage tank 5.

[0040] The vibration control unit 29 can control the eccentric vibration shaft to drive the vibration ball to move up and down within a height range of 0-3.5m above the gas distribution plate 10 of the fluidized bed, and can rotate 360° on the same horizontal plane above the gas distribution plate 10.

[0041] The low-temperature chlorination furnace diversion device also includes a central control system, which is connected to the vibration control unit 2, the information collection unit, and the delivery pump 6 via signals.

[0042] The operation method of the low-temperature chlorination furnace flow guiding device in this embodiment includes the following steps:

[0043] Step (1): Thermocouples are evenly distributed to detect the temperature signal in the material distribution area 11 and send it to the central control system. When the central control system receives a temperature anomaly, the temperature anomaly is determined to be the target location in the fluidized bed.

[0044] Step (2): The central control system sends a command to the vibratory control unit 2 to move the vibratory ball 9 to the target position;

[0045] Step (3): The central control system sends a command to the delivery pump 6 to start the delivery pump 6, so that the coolant flows in the inlet channel 12, the vibrating ball 9 and the outlet channel 13.

[0046] Step (4): Start the vibration control unit 2, and let the vibration ball 9 vibrate and guide the flow in the target position. After the temperature returns to normal, send a signal to the central control system. The central control system sends a stop command to the delivery pump 6 and the vibration control unit 2 respectively, and moves the three-chamber vibration guide tube 3 upward through the vibration control unit 2, thereby retracting the three-chamber vibration guide tube 3.

[0047] It should be noted that the components or steps in the above embodiments can be interchanged, substituted, added, or deleted. Therefore, the combinations formed by these reasonable permutations and transformations should also fall within the protection scope of this invention, and the protection scope of this invention should not be limited to the above embodiments.

[0048] The above are exemplary embodiments disclosed in this invention. The order of the disclosed embodiments is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. However, it should be noted that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the disclosed embodiments of this invention (including the claims) is limited to these examples. Various changes and modifications can be made without departing from the scope defined by the claims. The functions, steps, and / or actions of the methods according to the disclosed embodiments described herein do not need to be performed in any particular order. Furthermore, although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular.

[0049] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of the different aspects of the invention as described above exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A low temperature chlorination furnace flow guide device, characterized by, It comprises an information collecting unit and a vibrating component; The information collecting unit is used to collect temperature information at different positions of the material layer distribution area of the fluidized bed of the low-temperature chlorination furnace; The vibrating component comprises a vibrating guide pipe and a vibrating control unit, the vibrating control unit is arranged outside the top of the low-temperature chlorination furnace, the vibrating guide pipe is provided with an eccentric vibrating shaft, the top end of the eccentric vibrating shaft is connected with the vibrating control unit, and the bottom end of the eccentric vibrating shaft extends to the fluidized bed layer and can move in the fluidized bed layer.

2. A flow guide device for a cryogenic chlorination furnace as defined in claim 1, wherein The bottom end of the eccentric vibrating shaft is provided with a vibrating ball cavity, the vibrating guide pipe is further provided with a water inlet channel and a water outlet channel, the bottom ends of the water inlet channel and the water outlet channel are communicated with the vibrating ball cavity, the top end of the water inlet channel is connected with a water inlet pipe, and the top end of the water outlet channel is connected with a water outlet pipe.

3. A flow guide for a low temperature chlorination furnace as defined in claim 2, wherein A cooling liquid storage tank is further arranged, the cooling liquid storage tank is provided with a delivery pump, the water inlet pipe is connected with the outlet of the delivery pump, and the water outlet pipe is connected with the cooling liquid storage tank.

4. A flow guide for a low temperature chlorination furnace as defined in claim 1, wherein The top of the low-temperature chlorination furnace is provided with a vibrating installation base, the middle part of the vibrating guide pipe is connected to the top of the low-temperature chlorination furnace through the vibrating installation base, and the vibrating guide pipe is movably connected with the vibrating installation base.

5. A flow guide for a low temperature chlorination furnace as defined in claim 1, wherein The information collecting unit comprises a plurality of temperature detectors, and the plurality of temperature detectors are arranged at different positions of the material layer distribution area.

6. A flow guide for a low temperature chlorination furnace as defined in claim 5, wherein The temperature detector is one of a thermocouple detector and a temperature sensor.

7. A flow guide for a low temperature chlorination furnace as defined in claim 3, wherein The vibrating control unit can control the bottom end of the eccentric vibrating shaft to drive the vibrating ball cavity to move.

8. A flow guide for a low temperature chlorination furnace as defined in claim 7, wherein A central control system is further arranged, and the central control system is signal-connected with the vibrating control unit, the information collecting unit and the delivery pump.

9. A flow guide for a low temperature chlorination furnace as defined in claim 7, wherein The vibrating ball cavity can move up and down within a height range of 0-3.5 m above the gas distribution plate of the fluidized bed and rotate by 360 degrees on the same horizontal plane above the gas distribution plate.

10. A method of operating a flow guide for a cryogenic chlorination furnace as defined in claim 8, wherein The method comprises the following steps: Step (1): the information collecting unit detects temperature signals in the material layer distribution area and sends the signals to the central control system, when the central control system receives an abnormal temperature point, the abnormal temperature point is determined as a target position in the fluidized bed layer; Step (2): the central control system sends a command to the vibrating control unit to move the vibrating ball cavity to the target position; Step (3): the central control system sends a command to the delivery pump to start the delivery pump, so that the cooling liquid flows in the water inlet channel, the vibrating ball cavity and the water outlet channel; Step (4): the vibrating control unit is started to make the vibrating ball cavity vibrate and guide flow at the target position, and after the temperature returns to normal, a signal is sent to the central control system, the central control system sends stop commands to the delivery pump and the vibrating control unit respectively, and the vibrating guide pipe is retracted.

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