Vanadium product production system

Abstract

The invention relates to the technical field of vanadium metallurgy, in particular to a vanadium product production system, which comprises a leaching device, a liquid storage device, a liquid outlet device, a liquid inlet device, a liquid outlet device, a liquid outlet device, a liquid outlet device and a liquid outlet device, and is characterized in that the leaching device comprises a sand pump, a high-level tank and a belt filter, a material inlet of the dephosphorization device is communicated with a material outlet of the belt filter; a feeding hole of the underflow filter pressing device is communicated with an underflow discharging hole of the dephosphorization device; the control device comprises a concentration detection unit and a distribution mechanism, the concentration detection unit is arranged in the underflow filter pressing device, and the distribution mechanism is connected to a discharge port of the underflow filter pressing device; the steam stirring mechanism comprises a gas source, a gas inlet pipe and a gas outlet pipe; the heat exchange device comprises a heat release cavity and a heat absorption cavity, the air outlet pipe is connected to the air inlet of the air source through the heat release cavity, and the washing water pipe is connected to the belt filter through the heat absorption cavity. Graded recycling of the filtrate is achieved through the control device, and heat energy recycling is achieved through the heat exchange device.

Description

Technical Field

[0001] This disclosure relates to the field of vanadium metallurgy technology, and in particular to a vanadium product production system. Background Technology

[0002] In vanadium product production, sodium-roasted clinker is wet-milled into slurry and then pumped to the leaching process by a sand pump. The underflow generated in this process is filtered by plate and frame filter press, and the filtrate is usually directly mixed into the qualified liquid tank or discharged. The sand pump relies on fresh circulating water as sealing water, which leads to a series of problems: First, the qualified liquid is diluted by the filtrate, resulting in a large amount of wastewater to be treated. Second, the consumption of fresh circulating water is large, which disrupts the system's water balance and causes frequent process fluctuations. Third, the waste heat from the steam stirring tail gas of the phosphorus removal reactor is not utilized, resulting in serious energy waste.

[0003] Therefore, how to achieve the synergistic reuse of filtrate and heat energy in vanadium product production is a problem that those skilled in the art need to consider. Summary of the Invention

[0004] One of the technical problems this disclosure aims to solve is how to achieve the synergistic effect of filtrate reuse and heat energy reuse in vanadium product production, as mentioned above.

[0005] To address the aforementioned technical problems, this disclosure provides a vanadium product production system, comprising: a leaching device, which includes a sand pump, a high-level tank, and a belt filter connected in sequence, with a washing water pipe connected to the belt filter; a phosphorus removal device, the inlet of which is connected to the outlet of the belt filter; an underflow filter press, the inlet of which is connected to the underflow outlet of the phosphorus removal device; and a control device, which includes a concentration detection unit and a distribution mechanism. The concentration detection unit is disposed within the underflow filter press for detecting the concentration of the filtrate produced by the underflow filter press, and the distribution mechanism is connected to the underflow filter press. The filtrate is distributed to the sand pump or high-level tank based on the filtrate concentration detected by the concentration detection unit at the discharge port; the steam stirring mechanism includes a gas source, an inlet pipe and an outlet pipe. One end of the inlet pipe is connected to the outlet of the gas source, and the other end is connected to the inlet of the dephosphorization device to discharge steam into the dephosphorization device. One end of the outlet pipe is connected to the outlet of the dephosphorization device, and the other end is connected to the inlet of the gas source to send steam back into the gas source; the heat exchange device includes a heat release chamber and a heat absorption chamber. The outlet pipe is connected to the inlet of the gas source through the heat release chamber, and the washing water pipe is connected to the belt filter through the heat absorption chamber.

[0006] In some embodiments, the dispensing mechanism includes a tee, a first shut-off valve, and a second shut-off valve. The inlet of the tee is connected to the outlet of the underflow filter press, the first outlet of the tee is connected to the inlet of the sand pump, and the second outlet of the tee is connected to the inlet of the high-level tank. The first shut-off valve is installed on the first outlet of the tee, and the second shut-off valve is installed on the second outlet of the tee.

[0007] In some embodiments, the leaching apparatus further includes a clinker slurry tank and a filtrate tank, wherein the outlet of the clinker slurry tank is connected to the inlet of the sand pump, the inlet of the filtrate tank is connected to the outlet of the belt filter, and the outlet of the filtrate tank is connected to the inlet of the dephosphorization device.

[0008] In some embodiments, the phosphorus removal device includes a phosphorus removal reaction tank, a settling tank, a clarification tank, a vanadium solution buffer tank, and a vanadium solution storage tank connected in sequence. The inlet of the phosphorus removal reaction tank is connected to the outlet of the filtrate tank. The bottom of the settling tank, the clarification tank, the vanadium solution buffer tank, and the vanadium solution storage tank are all provided with parallel underflow outlets to form the underflow outlet of the phosphorus removal device. The air inlet and air outlet of the phosphorus removal device are located on the phosphorus removal reaction tank.

[0009] In some embodiments, the underflow filter press includes an underflow trough, a plate and frame filter press, and a filtrate buffer tank connected in sequence. The inlet of the underflow trough is connected to the underflow outlet of the phosphorus removal device, the outlet of the filtrate buffer tank is connected to the inlet of a tee, and the concentration detection unit is disposed inside the filtrate buffer tank.

[0010] In some embodiments, a clinker slurry pipe is connected to the clinker slurry tank.

[0011] In some embodiments, level gauges are provided on the vanadium solution storage tank, the underflow tank, and the filtrate buffer tank.

[0012] In some embodiments, lift pumps are provided between the filtrate tank and the phosphorus removal reaction tank, between the phosphorus removal reaction tank and the settling tank, between the vanadium solution buffer tank and the vanadium solution storage tank, between the underflow trough and the plate and frame filter press, and between the plate and frame filter press and the filtrate buffer tank.

[0013] In some embodiments, a first feed port and a second feed port are respectively provided on the phosphorus removal reaction tank and the underflow tank.

[0014] In some embodiments, the washing water pipe includes a primary water pipe and a secondary water pipe, with the primary water pipe located on the side near the feed inlet of the belt filter and the secondary water pipe located on the side near the discharge outlet of the belt filter.

[0015] The above technical solution has at least the following beneficial effects: This disclosure provides a vanadium product production system that enables graded reuse of filtrate through a control device and heat energy recovery through a heat exchange device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a vanadium product production system according to an embodiment of the present disclosure.

[0018] Explanation of reference numerals in the attached figures: 1. Leaching device; 2. Sand pump; 3. High-level tank; 4. Belt filter; 5. Washing water pipe; 6. Phosphorus removal device; 7. Underflow filter press; 8. Concentration detection unit; 9. Gas source; 10. Inlet pipe; 11. Outlet pipe; 12. Heat exchanger; 13. Exothermic chamber; 14. Absorbent chamber; 15. T-junction; 16. First shut-off valve; 17. Second shut-off valve; 18. Clinker slurry tank; 19. Filtrate tank; 20. Phosphorus removal reaction tank; 21. Settling tank; 22. Clarifying tank; 23. Vanadium solution buffer tank; 24. Vanadium solution storage tank; 25. Underflow trough; 26. Plate and frame filter press; 27. Filtrate buffer tank; 28. Clinker slurry pipe; 29. ​​Level gauge; 30. Booster pump; 32. First feed port; 33. Second feed port; 34. Primary water pipe; 35. Secondary water pipe. Detailed Implementation

[0019] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0021] It should be noted that, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0023] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure depending on the specific circumstances. When a particular device is described as being located between a first device and a second device, an intermediary device may or may not be present between the particular device and the first or second device.

[0024] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0026] As mentioned in the background section above, how to achieve the synergistic reuse of filtrate and heat energy recovery in vanadium product production is a problem that those skilled in the art need to consider. To this end, the inventors of this application provide a vanadium product production system in one or more embodiments, which realizes the tiered reuse of filtrate through a control device and the recovery of heat energy through a heat exchange device. This solves one or more problems in the prior art.

[0027] To address the aforementioned technical problems, this invention provides a vanadium product production system, such as... Figure 1 As shown, the system includes: a leaching device 1, comprising a sand pump 2, a high-level tank 3, and a belt filter 4 connected in sequence, with a washing water pipe 5 connected to the belt filter 4; a phosphorus removal device 6, the inlet of which is connected to the outlet of the belt filter 4; an underflow filter press 7, the inlet of which is connected to the underflow outlet of the phosphorus removal device 6; and a control device, comprising a concentration detection unit 8 and a distribution mechanism. The concentration detection unit 8 is installed inside the underflow filter press 7 to detect the concentration of the filtrate produced by the underflow filter press 7, and the distribution mechanism is connected to the outlet of the underflow filter press 7 and operates according to the concentration of the filtrate detected by the concentration detection unit 8. The filter liquid is distributed to the sand pump 2 or the high-level tank 3; the steam stirring mechanism includes a gas source 9, an inlet pipe 10 and an outlet pipe 11. One end of the inlet pipe 10 is connected to the outlet of the gas source 9, and the other end is connected to the inlet of the dephosphorization device 6 to discharge steam into the dephosphorization device 6. One end of the outlet pipe 11 is connected to the outlet of the dephosphorization device 6, and the other end is connected to the inlet of the gas source 9 to send steam back into the gas source 9; the heat exchange device 12 includes a heat release chamber 13 and a heat absorption chamber 14. The outlet pipe 11 is connected to the inlet of the gas source 9 through the heat release chamber 13, and the washing water pipe 5 is connected to the belt filter 4 through the heat absorption chamber 14.

[0028] Specifically, the filtrate produced by the underflow filter press 7 has a certain concentration (containing vanadium). A concentration threshold is set. When the concentration of the filtrate detected by the concentration detection unit 8 exceeds the threshold, the distribution mechanism sends the filtrate to the high-level tank 3 for re-entry into the vanadium product production system for processing, thereby improving the system's output rate. When the filtrate concentration is below the threshold, the distribution mechanism sends the filtrate to the sand pump 2 for use as closed water. The graded reuse of the filtrate is achieved through the cooperation of the concentration detection unit 8 and the distribution unit. According to the process requirements, steam needs to be introduced into the dephosphorization unit 6 for stirring. At the same time, the washing water required by the belt filter 4 also needs a certain temperature. The steam forms a circulation between the gas source 9, the inlet pipe 10, the dephosphorization unit 6, and the outlet pipe 11. Since the temperature of the steam discharged from the dephosphorization unit 6 into the outlet pipe 11 is higher than the temperature required by the washing water, the waste heat of the steam is transferred to the washing water through the heat exchange device 12, thereby realizing the reuse of heat energy.

[0029] Compared with the prior art, the vanadium product production system of this application realizes the graded reuse of filtrate through the control device and the heat energy recovery through the heat exchange device 12.

[0030] In some embodiments, such as Figure 1As shown, the distribution mechanism includes a three-way valve 15, a first shut-off valve 16, and a second shut-off valve 17. The inlet of the three-way valve 15 is connected to the outlet of the underflow filter press 7. The first outlet of the three-way valve 15 is connected to the inlet of the sand pump 2, and the second outlet of the three-way valve 15 is connected to the inlet of the high-level tank 3. The first shut-off valve 16 is installed on the first outlet of the three-way valve 15, and the second shut-off valve 17 is installed on the second outlet of the three-way valve 15. Specifically, when the filtrate concentration detected by the concentration detection unit 8 exceeds the threshold, the first shut-off valve 16 closes, the second shut-off valve 17 opens, and the filtrate enters the high-level tank 3 for reprocessing. At this time, the closed water for the sand pump 2 is supplied by the closed water supply mechanism of the system. When the filtrate concentration detected by the concentration detection unit 8 is lower than the threshold, the first shut-off valve 16 opens, the second shut-off valve 17 closes, and the filtrate is supplied to the sand pump 2 as closed water. At this time, the closed water supply mechanism stops supplying water. The three-way valve 15, the first shut-off valve 16, and the second shut-off valve 17 realize the graded reuse of the filtrate.

[0031] In some embodiments, such as Figure 1 As shown, the leaching device 1 also includes a clinker slurry tank 18 and a filtrate tank 19. The outlet of the clinker slurry tank 18 is connected to the inlet of the sand pump 2, and the inlet of the filtrate tank 19 is connected to the outlet of the belt filter 4. The outlet of the filtrate tank 19 is also connected to the inlet of the descaling device 6. The clinker slurry tank 18 provides slurry to the sand pump 2, and the filtrate tank 19 serves as a process buffer device, ensuring the continuity of production.

[0032] In some embodiments, such as Figure 1 As shown, the phosphorus removal device 6 includes a phosphorus removal reaction tank 20, a settling tank 21, a clarification tank 22, a vanadium solution buffer tank 23, and a vanadium solution storage tank 24 connected in sequence. The inlet of the phosphorus removal reaction tank 20 is connected to the outlet of the filtrate tank 19. The bottoms of the settling tank 21, the clarification tank 22, the vanadium solution buffer tank 23, and the vanadium solution storage tank 24 are all provided with parallel underflow outlets to form the underflow outlet of the phosphorus removal device 6. The air inlet and outlet of the phosphorus removal device 6 are located on the phosphorus removal reaction tank 20. The phosphorus removal, settling, clarification, buffering, and storage processes of the phosphorus removal reaction tank 20, the settling tank 21, the clarification tank 22, the vanadium solution buffer tank 23, and the vanadium solution storage tank 24 meet the process requirements. At the same time, the underflow outlet of the phosphorus removal device 6 can discharge the solution with high slag content into the underflow filter press 7 for treatment. The solution with high slag content settles at the bottom of the above equipment, and the clear liquid is at the top.

[0033] In some embodiments, such as Figure 1As shown, the underflow filter press 7 includes an underflow trough 25, a plate and frame filter press 26, and a filtrate buffer tank 27 connected in sequence. The inlet of the underflow trough 25 is connected to the underflow outlet of the phosphorus removal device 6, and the outlet of the filtrate buffer tank 27 is connected to the inlet of the tee 15. The concentration detection unit 8 is installed inside the filtrate buffer tank 27. Specifically, the underflow is filtered in the plate and frame filter press 26 to form filtrate, and the underflow is buffered in the underflow trough 25 and the filtrate is buffered in the filtrate buffer tank 27, ensuring the continuity of production.

[0034] In some embodiments, such as Figure 1 As shown, a clinker slurry pipe 28 is connected to the clinker slurry tank 18. The clinker slurry pipe 28 supplies slurry to the clinker slurry tank 18.

[0035] In some embodiments, such as Figure 1 As shown, level gauges 29 are installed on the vanadium solution storage tank 24, the underflow tank 25, and the filtrate buffer tank 27. The level gauges 29 can monitor the liquid level in real time to avoid supply interruptions or overflow problems.

[0036] In some embodiments, such as Figure 1 As shown, lift pumps 30 are installed between the filtrate tank 19 and the phosphorus removal reaction tank 20, between the phosphorus removal reaction tank 20 and the settling tank 21, between the vanadium solution buffer tank 23 and the vanadium solution storage tank 24, between the underflow trough 25 and the plate and frame filter press 26, and between the plate and frame filter press 26 and the filtrate buffer tank 27. The lift pumps 30 ensure the flowability of the solution between the various devices, meeting the production process requirements.

[0037] In some embodiments, such as Figure 1 As shown, the dephosphorization reaction tank 20 and the underflow tank 25 are respectively provided with a first feed port 32 and a second feed port 33. The dephosphorization agent (calcium chloride solution) is added into the dephosphorization reaction tank 20 through the first feed port 32 to meet the process requirements, and water is added into the underflow tank 25 through the second feed port 33 to dilute the underflow and meet the flowability requirements of the underflow in subsequent equipment.

[0038] In some embodiments, such as Figure 1 As shown, the washing water pipe 5 includes a primary water pipe 34 and a secondary water pipe 35. The primary water pipe 34 is located near the feed inlet of the belt filter 4, and the secondary water pipe 35 is located near the discharge outlet of the belt filter 4. The primary water pipe 34 and the secondary water pipe 35 sequentially spray hot water onto the filter cake of the belt filter 4, forming a stepped process of preliminary rinsing and deep dissolution. The primary washing prioritizes rinsing the low-concentration vanadium-containing solution adhering to the surface of the filter cake, while the secondary washing penetrates deep into the pores of the filter cake to dissolve the residual vanadium element inside, avoiding resource waste. In summary, compared with the prior art, this disclosure provides a vanadium product production system that realizes the graded reuse of filtrate through a control device and the heat energy recovery through a heat exchange device 12.

[0039] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0040] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A vanadium product production system, characterized in that, include: The leaching device (1) includes a sand pump (2), a high-level tank (3) and a belt filter (4) connected in sequence, and a washing water pipe (5) is connected to the belt filter (4). Phosphorus removal device (6), the inlet of which is connected to the outlet of the belt filter (4); The underflow filter press (7) is connected to the underflow outlet of the phosphorus removal device (6). The control device includes a concentration detection unit (8) and a distribution mechanism. The concentration detection unit (8) is installed in the underflow filter press (7) to detect the concentration of the filtrate produced by the underflow filter press (7). The distribution mechanism is connected to the outlet of the underflow filter press (7) and distributes the filtrate to the sand pump (2) or the high-level tank (3) according to the concentration of the filtrate detected by the concentration detection unit (8). A steam stirring mechanism is provided, comprising a gas source (9), an inlet pipe (10), and an outlet pipe (11). One end of the inlet pipe (10) is connected to the outlet of the gas source (9), and the other end is connected to the inlet of the dephosphorization device (6) to discharge steam into the dephosphorization device (6). One end of the outlet pipe (11) is connected to the outlet of the dephosphorization device (6), and the other end is connected to the inlet of the gas source (9) to send the steam back into the gas source (9). The heat exchange device (12) includes a heat release chamber 13 and a heat absorption chamber 14. The air outlet pipe (11) is connected to the air inlet of the air source (9) through the heat release chamber 13. The washing water pipe (5) is connected to the belt filter (4) through the heat absorption chamber 14.

2. The vanadium product production system according to claim 1, characterized in that, The distribution mechanism includes a three-way valve (15), a first shut-off valve (16), and a second shut-off valve (17). The inlet of the three-way valve (15) is connected to the outlet of the underflow filter press (7). The first outlet of the three-way valve (15) is connected to the inlet of the sand pump (2). The second outlet of the three-way valve (15) is connected to the inlet of the high-level tank (3). The first shut-off valve (16) is installed on the first outlet of the three-way valve (15), and the second shut-off valve (17) is installed on the second outlet of the three-way valve (15).

3. The vanadium product production system according to claim 2, characterized in that, The leaching device (1) also includes a clinker slurry tank (18) and a filtrate tank (19). The outlet of the clinker slurry tank (18) is connected to the inlet of the sand pump (2). The inlet of the filtrate tank (19) is connected to the outlet of the belt filter (4). The outlet of the filtrate tank (19) is connected to the inlet of the dephosphorization device (6).

4. The vanadium product production system according to claim 3, characterized in that, The phosphorus removal device (6) includes a phosphorus removal reaction tank (20), a settling tank (21), a clarification tank (22), a vanadium solution buffer tank (23), and a vanadium solution storage tank (24) connected in sequence. The inlet of the phosphorus removal reaction tank (20) is connected to the outlet of the filtrate tank (19). The bottom of the settling tank (21), the clarification tank (22), the vanadium solution buffer tank (23), and the vanadium solution storage tank (24) are all provided with parallel bottom outlets to form the bottom outlet of the phosphorus removal device (6). The air inlet and air outlet of the phosphorus removal device (6) are located on the phosphorus removal reaction tank (20).

5. The vanadium product production system according to claim 4, characterized in that, The underflow filter press (7) includes an underflow trough (25), a plate and frame filter press (26), and a filtrate buffer tank (27) connected in sequence. The inlet of the underflow trough (25) is connected to the underflow outlet of the phosphorus removal device (6), and the outlet of the filtrate buffer tank (27) is connected to the inlet of the tee (15). The concentration detection unit (8) is installed inside the filtrate buffer tank (27).

6. The vanadium product production system according to claim 5, characterized in that, The clinker slurry tank (18) is connected to a clinker slurry pipe (28).

7. The vanadium product production system according to claim 6, characterized in that, Level gauges (29) are installed on the vanadium solution storage tank (24), the underflow tank (25), and the filtrate buffer tank (27).

8. The vanadium product production system according to claim 7, characterized in that, A booster pump (30) is provided between the filtrate tank (19) and the phosphorus removal reaction tank (20), between the phosphorus removal reaction tank (20) and the settling tank (21), between the vanadium solution buffer tank (23) and the vanadium solution storage tank (24), between the underflow trough (25) and the plate and frame filter press (26), and between the plate and frame filter press (26) and the filtrate buffer tank (27).

9. The vanadium product production system according to claim 8, characterized in that, The phosphorus removal reactor (20) and the underflow trough (25) are respectively provided with a first feed port (32) and a second feed port (33).

10. The vanadium product production system according to claim 8, characterized in that, The washing water pipe (5) includes a primary water pipe (34) and a secondary water pipe (35). The primary water pipe (34) is located on the side near the feed inlet of the belt filter (4), and the secondary water pipe (35) is located on the side near the discharge outlet of the belt filter (4).

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