Slurry spraying system and slurry spraying method for chlorination furnace
The chlorination furnace slurry spraying system addresses non-uniform mud spraying issues by using a structured mud conveying system with real-time adjustments, ensuring uniform distribution and efficient heat exchange, thereby reducing costs and improving efficiency.
Patent Information
- Application Number
- CN202411495496.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2024-12-31
AI Technical Summary
The existing mud spraying systems in chlorination furnaces fail to ensure uniform mud spraying under varying production capacities and working conditions, leading to mud entering the dust collection system under negative pressure, excessive liquid phase in the dust collection chamber, and increased costs and reduced efficiency.
A chlorination furnace slurry spraying system with multiple groups of mud conveying devices, including a circulating pump tank, variable frequency submersible pump, mud ascending and transverse pipelines, and a rotating disc, along with real-time adjustments of pump frequency and motor speed to maintain uniform mud spraying and optimize flue gas temperature control.
Ensures uniform mud spraying across different conditions, reduces flue gas, minimizes excessive liquid phase, and enhances efficiency by stabilizing the mud distribution and heat exchange process.
Smart Images
Figure CN119223014A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of metallurgy, and in particular to a slurry spraying system and a slurry spraying method for a chlorination furnace. Background Art
[0002] In the chlorination industry, titanium-containing materials such as blast furnace slag and titanium slag are generally reacted with chlorine in a fluidized bed or molten salt furnace to generate a gaseous titanium tetrachloride mixed gas, which is then subjected to dust collection, leaching, condensation and cooling to obtain a crude titanium tetrachloride liquid, which is then filtered to obtain a crude titanium tetrachloride that meets the refining requirements. The reaction between the titanium-containing material and chlorine is a highly exothermic reaction. In order to reduce the impurity content of the collected titanium tetrachloride, the flue gas temperature from the top of the chlorination furnace to the dust collection chamber needs to be controlled within a certain range to ensure the normal reaction. If the temperature is too high, excessive solids will enter the leaching system, thereby reducing the quality of the product. If the temperature is too low, part of the titanium tetrachloride will settle in the dust collection chamber, thereby reducing the titanium yield.
[0003] In the existing mud spraying system, the mud pipeline is arranged unreasonably, which may easily cause the mud returned to the chlorination furnace to enter the dust collection system under the action of negative pressure. This cannot meet the requirements of uniform spraying of the mud returned to the chlorination furnace under different production capacity conditions and working conditions, is not conducive to reducing the flue gas in the chlorination furnace, and may easily cause excessive liquid phase in the dust collection chamber and the appearance of thin material, which is not conducive to reducing costs and increasing efficiency.
[0004] Based on this, the existing technology is in urgent need of improvement. Summary of the invention
[0005] In view of this, the mud spraying system in the prior art cannot meet the requirement of uniform spraying of the mud returned to the chlorination furnace under different production capacity conditions and different working states, which easily causes the mud returned to the chlorination furnace to enter the dust collection system under the action of negative pressure, which is not conducive to reducing the flue gas in the chlorination furnace. It is also easy to cause excessive liquid phase in the dust collection chamber and the appearance of thin material, which is not conducive to cost reduction and efficiency improvement. The present disclosure provides a mud spraying system and a mud spraying method for a chlorination furnace.
[0006] According to a first aspect of the present invention, there is provided a chlorination furnace slurry spraying system, comprising: A plurality of groups of mud conveying devices, each group of mud conveying devices includes a circulating pump tank, a variable frequency submersible pump, a mud ascending pipeline, a mud transverse pipeline and a mud furnace inlet pipeline connected in sequence, wherein the circulating pump tank is connected to the leaching tower, and the mud furnace inlet pipeline is connected to the furnace top of the chlorination furnace and vertically extends into the interior of the chlorination furnace; The spraying component includes a rotating disc and a driving shaft connected to the lower port of the mud inlet pipe. The driving shaft and the central axis of the mud inlet pipe are on the same central axis. One end of the driving shaft is connected to the rotating disc, and the other end is connected to the driving motor located on the furnace top.
[0007] In some embodiments, the rotating disc has streamlined guide bosses, and the guide bosses are evenly distributed on the rotating disc.
[0008] In some embodiments, the number of the guide bosses is 2 to 15.
[0009] In some embodiments, the elbow at the connection between the mud riser pipe and the mud transverse pipe is installed with a high-pressure nitrogen purge interface and a valve.
[0010] In some embodiments, the total number of elbows at the connection between the mud rising pipe and the mud lateral pipe, and the total number of elbows at the connection between the mud lateral pipe and the mud inlet pipe does not exceed 4.
[0011] In some embodiments, the diameters of the mud inlet pipe and the mouth of the chlorination furnace are perpendicular to each other, the distance between the lower end of the mud inlet pipe and the surface of the material layer in the chlorination furnace is 0.3~4 meters, the vertical distance between the lower end of the mud inlet pipe and the flue gas outlet in the chlorination furnace is 0.5~4m, and the height difference between the lower ends of the mud inlet pipes of different groups of mud conveying devices is 0.3~2m.
[0012] In some embodiments, the diameter of the rotating disc is 1 to 5 times the diameter of the mud inlet pipe, the diameter of the mud inlet pipe is 40 to 60 mm, and the diameter of the drive shaft is 10 to 20 mm.
[0013] In some embodiments, the number of groups of the mud conveying devices is 2 to 5 groups.
[0014] In some embodiments, the angle between the mud transverse pipe and the horizontal direction is 1-5°, and the angle between the rotating disk and the horizontal direction is 0-3°.
[0015] According to a second aspect of the present invention, there is provided a slurry spraying method, using the slurry spraying system for a chlorination furnace as described in any one of the above, comprising: Real-time calculation of the capacity load in the chlorination furnace; According to the real-time comparison result between the production capacity load and the preset load threshold, the frequency of the variable frequency submersible pump is adjusted to reduce or increase the flow rate of the mud in the conveying device, and the frequency of the drive motor is adjusted to reduce or increase the rotation speed of the rotating disc.
[0016] The above-mentioned mud spraying system and mud spraying method for a chlorination furnace include several groups of mud conveying devices and spraying parts, wherein each group of conveying devices includes a circulating pump tank, a variable frequency submerged pump, a mud ascending pipe, a mud transverse pipe and a mud inlet pipe connected in sequence, the circulating pump tank is connected to the leaching tower, the mud inlet pipe is connected to the furnace top of the chlorination furnace and vertically extends into the chlorination furnace, and the spraying parts include a rotating disc and a driving shaft connected to the lower port of the mud inlet pipe, the driving shaft and the central axis of the mud inlet pipe are on the same central axis, one end of the driving shaft is connected to the rotating disc, and the other end is connected to the driving motor located on the furnace top. The mud pipeline is reasonably arranged, which minimizes the problem of the mud returning to the chlorination furnace entering the dust collection system under the action of negative pressure, so as to ensure the requirement of uniform spraying of the mud returning to the chlorination furnace under different production capacity conditions and different working conditions, which is conducive to reducing the flue gas in the chlorination furnace, reducing the problem of excessive liquid phase in the dust collecting chamber causing thinning, and is conducive to reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of a chlorination furnace mud spraying system and a chlorination furnace provided in one embodiment of the present invention; Figure 2 A schematic structural diagram of a spraying component provided by another embodiment of the present invention; Figure 3 A schematic diagram of a mud spraying range of a mud spraying system for a chlorination furnace provided in another embodiment of the present invention; Figure 4 A flow chart of a slurry spraying method provided for another embodiment of the present invention; The reference numerals are as follows: 1. Chlorination furnace; 2. Circulation pump tank; 3. Variable frequency submersible pump; 4. Mud rising pipe; 5. High-pressure nitrogen purge interface and valve; 6. Mud transverse pipe; 7. Mud inlet pipe; 8. Rotating disc; 9. Guide boss; 10. Feed inlet; 11. Flue gas outlet; 12. Drive shaft; 13. Spraying range; 100. Mud spraying system for chlorination furnace; 101. Mud conveying device; 102. Spraying parts. DETAILED DESCRIPTION
[0019] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.
[0020] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.
[0021] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0022] In addition, the words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.
[0023] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.
[0024] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.
[0025] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.
[0026] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are only illustrative. Although only a few embodiments are described in detail in the present invention, it is easy for those skilled in the art to appreciate that multiple modifications are feasible without actually departing from the teaching of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, changes and deletions may be made to the design, operating conditions and parameters of the following exemplary embodiments.
[0027] According to a first aspect of the present invention, the present invention provides a slurry spraying system 100 for a chlorination furnace, please refer to Figure 1-3 The chlorination furnace mud spraying system 100 includes several groups of mud conveying devices 101, such as 2 to 5 groups. Figure 1 As shown, two groups of mud conveying devices 101 are used as examples for explanation. Each group of mud conveying devices 101 includes a circulating pump tank 2, a variable frequency submersible pump 3, a mud ascending pipeline 4, a mud transverse pipeline 6 and a mud inlet pipeline 7 connected in sequence. The other end of the circulating pump tank 2 is connected to the leaching tower. The mud inlet pipeline 7 is connected to the top of the chlorination furnace 1 and vertically extends into the chlorination furnace 1. Each group of mud conveying devices 101 also includes a spraying component 102. The spraying component 102 includes a rotating disc 8 connected to the lower port of the mud inlet pipeline 7 and a driving shaft 12 driving the spraying component 102. The driving shaft 12 and the central axis of the mud inlet pipeline 7 are on the same central axis. One end of the driving shaft 12 is connected to the rotating disc 8, and the other end is connected to the driving motor located on the top of the chlorination furnace 1. When the driving motor works, the driving shaft 12 drives the rotating disc 8 to rotate.
[0028] Please continue to refer to Figure 1-3 , when the circulating pump tank 2 and the variable frequency submersible pump 3 of the mud conveying device 101 extract the mud from the leaching tower, it is conveyed to the chlorination furnace 1 through the mud ascending pipe 4, the mud transverse pipe 6 and the mud inlet pipe 7. At the same time, the driving motor is turned on to make the driving shaft 12 rotate the rotating disc 8. The mud pipeline is arranged reasonably to achieve the goal of spraying the mud evenly in the chlorination furnace 1 to reduce the smoke in the chlorination furnace 1. Figure 3 As shown, Figure 3The schematic diagram of the mud spraying range of the mud spraying system for the chlorination furnace is shown. There are two groups of mud conveying devices 101, each of which sprays mud uniformly through the rotating disc of the spraying component 102 connected thereto, and the spraying range 13 is also a circular area. Under different working conditions, the flow rate of the mud in the mud rising pipe 4, the mud transverse pipe 6 and the mud furnace inlet pipe 7 is adjusted in real time by adjusting the frequency of the variable frequency submersible pump 3, and the speed of the driving shaft 12 driving the rotating disc 8 is adjusted in real time by adjusting the frequency of the driving motor, so as to adjust the rate of mud spraying in real time, and minimize the problem of the mud returning to the chlorination furnace 1 entering the dust collection system under the action of negative pressure, so as to ensure the uniform spraying of the mud returning to the chlorination furnace 1 under different production capacity conditions and different working conditions, which is conducive to reducing the flue gas in the chlorination furnace 1, reducing the problem of excessive liquid phase in the dust collection chamber causing thinning, and is conducive to reducing costs and increasing efficiency. The mud returns to the chlorination furnace 1, and the rotating disc 8 evenly sprays the mud on the flue gas area in the chlorination furnace 1, so that the mud can be evenly dispersed and heat exchanged with the flue gas, thereby improving the efficiency of heat exchange between the flue gas and the mud, and achieving the purpose of evenly controlling the flue gas temperature. At the same time, by adjusting the amount of mud transported in the mud transport device 101 and the rotation speed of the rotating disc 8, the spraying range and mixing efficiency during different production capacities of the chlorination furnace 1 can be met.
[0029] Please continue to refer to Figure 2 , there are streamlined guide bosses 9 on the rotating disc 8, and the guide bosses 9 are evenly distributed on the rotating disc 8. The number of the guide bosses 9 can be flexibly set according to actual use requirements. Generally, there are 2 to 15 streamlined guide bosses 9 on the rotating disc 8.
[0030] Please continue to refer to Figure 1-3 The elbow at the connection between the mud ascending pipeline 4 and the mud transverse pipeline 6 is equipped with a high-pressure nitrogen purge interface and a valve 5. When needed (for example, after stopping the return of the mud to the chlorination furnace 1), the valve 5 of the high-pressure nitrogen purge interface is opened to allow the high-pressure nitrogen to be blown into the pipeline to avoid mud deposition and scaling at the mud elbow and other locations that are difficult to clean. When not needed (for example, when the mud is returning to the chlorination furnace 1), the valve 5 of the high-pressure nitrogen purge interface is closed to avoid affecting the process of the mud returning to the chlorination furnace 1.
[0031] Please continue to refer to Figure 1-3 The total number of elbows at the connection between the mud ascending pipe 4 and the mud transverse pipe 6, and the total number of elbows at the connection between the mud transverse pipe 6 and the mud inlet pipe 7 shall not exceed 4. Figure 1There are two groups of mud conveying devices 101, each group has two elbows. By reasonably controlling the elbows at the connection between the mud rising pipe 4 and the mud transverse pipe 6, and the total number of elbows at the connection between the mud transverse pipe 6 and the mud inlet pipe 7, it is ensured that the mud in the pipe flows more smoothly and avoids the influence of excessive pressure fluctuation on the stability of the system. At the same time, it can avoid the mud flowing through the pipe for too long, thereby improving the efficiency of the mud returning to the chlorination furnace 1.
[0032] Please continue to refer to Figure 1-3 The diameters of the mud inlet pipe 7 and the feed port 10 of the chlorination furnace 1 are perpendicular to each other, the distance between the lower end of the mud inlet pipe 7 and the surface of the material layer in the chlorination furnace 1 is 0.3-4 meters, the vertical distance between the lower end of the mud inlet pipe 7 and the flue gas outlet 11 in the chlorination furnace 1 is 0.5-4 meters, and the height difference between the lower ends of the mud inlet pipes 7 of different groups of mud conveying devices 101 is 0.3-2 meters. By reasonably controlling the relative position relationship between the mud inlet pipe 7 and the chlorination furnace 1, it is ensured that the mud flowing out of the mud inlet pipe 7 can be evenly and stably sprayed on the material in the chlorination furnace 1, so as to minimize the flue gas in the chlorination furnace 1 and reduce the problem of thin material due to excessive liquid phase in the dust collecting chamber, which is conducive to reducing costs and increasing efficiency.
[0033] According to some embodiments of the present invention, the diameter of the rotating disc 8 is 1 to 5 times the diameter of the mud inlet furnace pipe 7, the diameter of the mud inlet furnace pipe 7 is 40 to 60 mm, and the diameter of the drive shaft 12 is 10 to 20 mm. By reasonably controlling the ratio of the diameter of the rotating disc 8 to the diameter of the mud inlet furnace pipe 7, as well as the diameter of the mud inlet furnace pipe 7 and the diameter of the drive shaft 12, the larger rotating disc 8 can better receive the mud flowing out of the mud inlet furnace pipe 7 and evenly distribute it in a specific area, and the larger rotating disc 8 can play a certain buffering role to ensure stable mud output.
[0034] Please continue to refer to Figure 1-3 , the number of groups of mud conveying devices 101 is 2 to 5. Figure 1 There are two groups of mud conveying devices in total. The number of groups of the mud conveying devices 101 is properly controlled to ensure that the mud can be stably and evenly conveyed to the chlorination furnace 1. At the same time, waste is reduced, which is conducive to reducing costs and increasing efficiency.
[0035] According to some embodiments of the present invention, the angle between the mud transverse pipe 6 and the horizontal direction is 1~5°, and the angle between the rotating disc 8 and the horizontal direction is 0~3°. The angle between the mud transverse pipe 6 and the horizontal direction is 1~5°, and the mud can flow relatively smoothly in the pipe with the help of a small inclination angle. It is neither too large to cause the mud flow rate to be too fast, which may cause pipe wear or impact equipment, nor too small to cause the mud flow to be too slow or even cause siltation problems. The angle between the rotating disc 8 and the horizontal direction is 0~3°, which can make the mud falling on the rotating disc 8 more evenly distributed under the action of centrifugal force, so as to better cover the target area.
[0036] In order to further understand the slurry spraying system 100 for a chlorination furnace of the present invention, it is further described in detail in the following specific embodiments.
[0037] Example 1 The diameter of the chlorination furnace 1 is 4m, and there are 2 groups of mud conveying devices 101. The diameter directions of the mud inlet pipe 7 of the mud conveying device 101 and the feed port 10 of the chlorination furnace 1 are perpendicular to each other. The lower end of the mud inlet pipe 7 is 1.2m away from the center of the chlorination furnace 1. There is an elbow at the connection between the mud rising pipe 4 and the mud transverse pipe 6 of each group of mud conveying devices 101, and there is an elbow at the connection between the mud transverse pipe 6 and the mud inlet pipe 7. The outlet diameter of the mud inlet pipe 7 is 50mm, and one of the mud The distance between the slurry inlet pipe 7 and the material layer surface is 2m, the distance between another slurry inlet pipe 7 and the material layer surface is 2.5m, the vertical distance between the lower end of the slurry inlet pipe 7 and the flue gas outlet 11 in the chlorination furnace 1 is 2m, the diameter of the rotating disc 8 is 100mm, the diameter of the drive shaft 12 is 10mm, the angle between the slurry transverse pipe 6 and the horizontal direction is 1°, there are 10 guide bosses 9 on the rotating disc 8, and the angle between the rotating disc 8 and the horizontal direction is 1°.
[0038] Example 2 The diameter of the chlorination furnace 1 is 4m, and there are 5 groups of mud conveying devices 101. The diameter directions of the mud inlet pipe 7 of the mud conveying device 101 and the feed port 10 of the chlorination furnace 1 are perpendicular to each other. The lower end of the mud inlet pipe 7 is 1.2m away from the center of the chlorination furnace 1. There are 4 elbows between the pipes of each group of mud conveying devices 101. The outlet diameter of the mud inlet pipe 7 is 40mm. The distances between the mud inlet pipe 7 of each group and the surface of the material layer are 0.3m, 2m, 2.5m and 4m respectively. The vertical distance between the lower end of the mud inlet pipe 7 and the flue gas outlet 11 in the chlorination furnace 1 is 4m. The diameter of the rotating disc 8 is 200mm, the diameter of the drive shaft 12 is 20mm, and there are 15 guide bosses 9 on the rotating disc 8. The angle between the mud transverse pipe 6 and the horizontal direction is 5°, and the angle between the rotating disc 8 and the horizontal direction is 0°.
[0039] Example 3 The diameter of the chlorination furnace 1 is 4m, and there are 2 groups of mud conveying devices 101. The diameter directions of the mud inlet pipe 7 of the mud conveying device 101 and the feed port 10 of the chlorination furnace 1 are perpendicular to each other. The lower end of the mud inlet pipe 7 is 1.2m away from the center of the chlorination furnace 1. There is an elbow at the connection between the mud rising pipe 4 and the mud transverse pipe 6 of each group of mud conveying devices 101, and there is an elbow at the connection between the mud transverse pipe 6 and the mud inlet pipe 7. The outlet diameter of the mud inlet pipe 7 is 60mm, and one of the mud The distance between the slurry inlet pipe 7 and the material layer surface is 2m, the distance between another slurry inlet pipe 7 and the material layer surface is 2.5m, the vertical distance between the lower end of the slurry inlet pipe 7 and the flue gas outlet 11 in the chlorination furnace 1 is 0.5m, the diameter of the rotating disc 8 is 60mm, the diameter of the drive shaft 12 is 20mm, there are two guide bosses 9 on the rotating disc 8, the angle between the mud transverse pipe 6 and the horizontal direction is 5°, and the angle between the rotating disc 8 and the horizontal direction is 3°.
[0040] In the above three specific embodiments, the pipeline arrangement of the mud conveying device 101 is reasonable, which minimizes the problem of the mud returning to the chlorination furnace 1 entering the dust collection system under the action of negative pressure, so as to ensure the requirement of uniform spraying of the mud returning to the chlorination furnace 1 under different production capacity conditions and different working conditions, which is beneficial to reducing the flue gas in the chlorination furnace 1 and reducing the problem of excessive liquid phase in the dust collecting chamber causing thin material, which is beneficial to reducing costs and increasing efficiency.
[0041] According to a second aspect of the present invention, the present invention further provides a slurry spraying method, using the slurry spraying system for a chlorination furnace as described in any one of the above, comprising: Step a, real-time calculation of the capacity load in the chlorination furnace; Step b: according to the real-time comparison result between the production capacity load and the preset load threshold, the frequency of the variable frequency submersible pump is adjusted to reduce or increase the flow rate of the mud in the conveying device, and the frequency of the driving motor is adjusted to reduce or increase the rotation speed of the rotating disc.
[0042] In a specific embodiment, the capacity load in the chlorination furnace is calculated in real time and compared with a preset load threshold. For example, when the capacity load in the chlorination furnace exceeds 70%, it means that the capacity load in the chlorination furnace is too large. At this time, the rate of the mud introduced into the chlorination furnace should be reduced as much as possible, and the frequency of the variable frequency submersible pump is adjusted to reduce the frequency of the variable frequency submersible pump so as to slow down the flow rate of the mud in the mud rising pipe, the mud transverse pipe and the mud furnace inlet pipe, and the frequency of the driving motor is adjusted to reduce the rotation speed of the rotating disc driven by the driving shaft, so as to reduce the rate of slurry spraying. In the chlorination furnace, the mud exchanges heat with the rising high-temperature flue gas, and the flue gas temperature is controlled in the range of T-25℃~T+25℃. When the temperature reaches T+20℃, the mud flow rate begins to be adjusted. For example, the mud flow rate is controlled to increase by 1~10kg / h for every 5℃ increase in the flue gas temperature. When the temperature drops to T-20℃, the mud is stopped from being introduced into the chlorination furnace. Preferably, the elbow at the connection between the mud rising pipe and the mud horizontal pipe is opened at the same time, and a high-pressure nitrogen purge interface and valve are installed to allow high-pressure nitrogen to be blown into the pipe to avoid mud deposition and scaling in mud elbows and other difficult-to-clean locations. When the capacity load in the chlorination furnace is far less than 70%, it means that the amount of mud returning to the chlorination furnace is too small. At this time, the rate of the mud entering the chlorination furnace should be appropriately increased, and the frequency of the variable frequency submersible pump should be adjusted to increase the frequency of the variable frequency submersible pump appropriately, so that the flow rate of the mud in the mud rising pipe, the mud horizontal pipe and the mud into the furnace pipe can be appropriately increased, and the frequency of the driving motor can be adjusted to increase the speed of the rotating disc driven by the driving shaft, so as to increase the slurry spraying rate, so that the low flow mud also has a wider spraying range, expand the contact range between the flue gas and the mud, and obtain crude titanium tetrachloride with a smaller solid content.
[0043] In another specific embodiment, the chlorination furnace mud spraying system used is the chlorination furnace mud spraying system described in the embodiment, and its specific dimensions are not repeated.
[0044] When the capacity load in the chlorination furnace is 100%, the frequency of the variable frequency submersible pump is adjusted to control the mud flow rate to 35kg / h, and the frequency of the driving motor is adjusted to make the driving shaft drive the rotating disc to rotate at a speed of 80rad / min. In the chlorination furnace, the mud and the rising high-temperature flue gas undergo heat exchange, and the flue gas temperature is controlled to be in the range of 400-25℃~400+25℃. Among them, when the temperature reaches 400+20℃, the mud flow rate begins to be adjusted. For example, the mud flow rate is controlled to increase by 1~10kg / h for every 5℃ the flue gas temperature exceeds, until the mud flow rate increases to 38kg / h; when the temperature drops to 400-20℃, the mud is stopped from being introduced into the chlorination furnace, and at the same time, the elbow at the connection between the mud rising pipe and the mud horizontal pipe is opened. The high-pressure nitrogen purge interface and valve are installed to allow high-pressure nitrogen to be blown into the pipeline to avoid mud deposition and scaling at the mud elbow and other difficult-to-clean locations.
[0045] When the capacity load in the chlorination furnace is 80%, the frequency of the variable frequency submersible pump is adjusted to control the mud flow rate to 30kg / h, and the frequency of the driving motor is adjusted to make the driving shaft drive the rotating disc to rotate at a speed of 100rad / min. In the chlorination furnace, the mud and the rising high-temperature flue gas undergo heat exchange, and the flue gas temperature is controlled to be in the range of 400-25℃~400+25℃. Among them, when the temperature reaches 400+20℃, the mud flow rate begins to be adjusted. For example, the mud flow rate is controlled to increase by 1~10kg / h for every 5℃ the flue gas temperature exceeds, until the mud flow rate increases to 33kg / h; when the temperature drops to 400-20℃, the mud is stopped from being introduced into the chlorination furnace, and at the same time, the elbow at the connection between the mud rising pipe and the mud horizontal pipe is opened. The high-pressure nitrogen purge interface and valve are installed to allow high-pressure nitrogen to be blown into the pipeline to avoid mud deposition and scaling in mud elbows and other difficult-to-clean locations.
[0046] When the capacity load in the chlorination furnace is 60%, it is a low-load capacity. The frequency of the variable frequency submerged pump is adjusted to control the mud flow rate to 25kg / h, and the frequency of the drive motor is adjusted to make the drive shaft drive the rotating disc to rotate at a speed of 140rad / min, so that the low-flow mud also has a wider spraying range to ensure the contact range between the flue gas and the mud, and obtain crude titanium tetrachloride with a smaller solid content. In the chlorination furnace, the mud exchanges heat with the rising high-temperature flue gas, and the range of controlling the flue gas temperature is 400-25℃~400+25℃. Among them, when the temperature reaches 400+20℃, the mud flow rate begins to be adjusted. For example, the mud flow rate is controlled to increase by 1~10kg / h for every 5℃ increase in the flue gas temperature until the mud flow rate increases to 28kg / h; when the temperature drops to 400-20℃, the mud is stopped from being introduced into the chlorination furnace, and at the same time, the elbow at the connection between the mud rising pipe and the mud horizontal pipe is opened, and a high-pressure nitrogen purge interface and valve are installed to blow high-pressure nitrogen into the pipeline to avoid mud deposition and scaling in mud elbows and other difficult-to-clean locations.
[0047] The above-mentioned mud spraying method, under different working conditions, adjusts the flow rate of the mud in the mud rising pipe, mud transverse pipe and mud furnace inlet pipe in real time by adjusting the frequency of the variable frequency submerged pump, and adjusts the speed of the driving shaft driving the rotating disc in real time by adjusting the frequency of the driving motor, thereby adjusting the rate of mud spraying in real time, and reducing the problem of the mud returning to the chlorination furnace entering the dust collection system under the action of negative pressure as much as possible, so as to ensure the requirement of uniform spraying of the mud returning to the chlorination furnace under different production capacity conditions and different working conditions, which is conducive to reducing the flue gas in the chlorination furnace, reducing the problem of excessive liquid phase in the dust collection room causing thin materials, and is conducive to reducing costs and increasing efficiency. The mud returns to the chlorination furnace, and the rotating disc sprays the mud evenly in the flue gas area in the chlorination furnace, which can evenly disperse the mud and exchange heat with the flue gas, improve the efficiency of heat exchange between the flue gas and the mud, and achieve the purpose of uniformly controlling the flue gas temperature. At the same time, by adjusting the amount of mud transported in the mud conveying device and the rotation speed of the rotating disc, the spraying range and mixing efficiency during different production capacities of the chlorination furnace can be met.
[0048] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.
[0049] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.
Claims
1. A chlorination furnace mud spraying system, characterized in that: include: A plurality of groups of mud conveying devices, each group of mud conveying devices includes a circulating pump tank, a variable frequency submersible pump, a mud ascending pipeline, a mud transverse pipeline and a mud furnace inlet pipeline connected in sequence, wherein the circulating pump tank is connected to the leaching tower, and the mud furnace inlet pipeline is connected to the furnace top of the chlorination furnace and vertically extends into the interior of the chlorination furnace; The spraying component includes a rotating disc and a driving shaft connected to the lower port of the mud inlet pipe. The driving shaft and the central axis of the mud inlet pipe are on the same central axis. One end of the driving shaft is connected to the rotating disc, and the other end is connected to the driving motor located on the furnace top.
2. The chlorination furnace slurry spraying system according to claim 1, characterized in that: The rotating disc is provided with streamlined flow-guiding bosses, and the flow-guiding bosses are evenly distributed on the rotating disc.
3. The chlorination furnace mud spraying system according to claim 2, characterized in that: The number of the guide bosses is 2 to 15.
4. The chlorination furnace slurry spraying system according to claim 1, characterized in that: The elbow at the connection between the mud ascending pipeline and the mud transverse pipeline is equipped with a high-pressure nitrogen purge interface and a valve.
5. The chlorination furnace slurry spraying system according to claim 4, characterized in that: The total number of elbows at the connection between the mud rising pipe and the mud transverse pipe, and the total number of elbows at the connection between the mud transverse pipe and the mud inlet pipe shall not exceed 4.
6. The chlorination furnace slurry spraying system according to claim 1, characterized in that: The diameters of the mud inlet pipe and the opening of the chlorination furnace are perpendicular to each other, the distance between the lower end of the mud inlet pipe and the surface of the material layer in the chlorination furnace is 0.3~4 meters, the vertical distance between the lower end of the mud inlet pipe and the flue gas outlet in the chlorination furnace is 0.5~4m, and the height difference between the lower ends of the mud inlet pipes of different groups of mud conveying devices is 0.3~2m.
7. The chlorination furnace slurry spraying system according to claim 1, characterized in that: The diameter of the rotating disc is 1 to 5 times the diameter of the mud inlet furnace pipe, the diameter of the mud inlet furnace pipe is 40 to 60 mm, and the diameter of the driving shaft is 10 to 20 mm.
8. The chlorination furnace slurry spraying system according to claim 1, characterized in that: The number of groups of the mud conveying device is 2 to 5.
9. The chlorination furnace slurry spraying system according to claim 1, characterized in that: The angle between the mud transverse pipe and the horizontal direction is 1-5°, and the angle between the rotating disc and the horizontal direction is 0-3°.
10. A slurry spraying method, characterized in that: The chlorination furnace slurry spraying system according to any one of claims 1 to 9 comprises: Real-time calculation of the capacity load in the chlorination furnace; According to the real-time comparison result between the production capacity load and the preset load threshold, the frequency of the circulation pump tank is adjusted to reduce or increase the flow rate of the mud in the conveying device, and the frequency of the driving motor is adjusted to reduce or increase the rotation speed of the rotating disc.