High-potassium mother liquor recovery device and potassium chloride production system
By designing a high-potassium mother liquor recycling device and using solid-liquid separation and dehydration technology, the problem of the inability to effectively recover the solid phase part in the potassium chloride production process is solved, and efficient resource recycling and production efficiency are achieved.
Patent Information
- Application Number
- CN202421508276.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-27
AI Technical Summary
During the potassium chloride production process, existing recycling devices cannot effectively recover the solid phase part of high potassium mother liquor, resulting in waste of resources and inefficient production efficiency.
A high potassium mother liquor recovery device is designed, including a first recycling tank, a solid-liquid separation device, a first conveying pipeline and a dehydration device. The device realizes effective recovery of the solid phase part in the high-potassium mother liquor through solid-liquid separation and dehydration treatment.
The effective recovery of the solid phase part after the precipitation of high potassium mother liquor is achieved, the resource utilization rate and production efficiency are improved, and the precipitation and loss of solid phase in tail salt ponds or sedimentation ponds are reduced.
Smart Images
Figure CN222900301U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of potassium chloride production, in particular to a high-potassium mother liquor recovery device and a potassium chloride production system. Background Art
[0002] In the production process of potassium chloride, the overflow liquid of the crystallizer and the overflow liquid of the refined potassium thickener contain a large amount of high-potassium mother liquor (a solution containing a higher concentration of potassium ions). After these high-potassium mother liquors enter the high-potassium mother liquor recovery tank, they are uniformly passed into the sedimentation tank or the tailing salt tank. In the tailing salt tank, after sedimentation treatment, the clear liquid will be introduced into the brine addition process for the production of high-grade potassium chloride. In the sedimentation tank, the clear liquid after sedimentation will be introduced into the ore setting tank for ore drying.
[0003] In actual production, after the overflow liquid of the crystallizer and the overflow liquid of the refined potassium thickener are precipitated, the potassium content in the solid phase is higher than that in the liquid phase. The potassium chloride content in the solid phase is about 65%, and the salt content is about 15%. However, the above recovery method can only recover the liquid phase of the high-potassium mother liquor. The solid phase is precipitated to the bottom of the pool together with the foam and impurities when precipitating in the tailing salt pool or sedimentation pool, and cannot be effectively recovered. Utility Model Content
[0004] The main purpose of the utility model is to provide a high-potassium mother liquor recovery device and a potassium chloride production system, which can solve the problem that in the potassium chloride production process, the existing recovery device cannot effectively recover the solid phase part in the high-potassium mother liquor.
[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a high-potassium mother liquor recovery device is provided, comprising: a first recovery tank having a accommodating chamber, the first recovery tank comprising a first feed port and a first discharge port connected to the accommodating chamber; a solid-liquid separation device, the solid-liquid separation device comprising a second feed port, a second discharge port and an overflow port, the second feed port being selectively connected to the first discharge port; a first conveying pipeline, the feed end of the first conveying pipeline being selectively connected to the second discharge port, the discharge end of the first conveying pipeline being configured to be connected to a dehydration device; and a liquid phase recovery component, comprising a second recovery tank, the liquid inlet end of the second recovery tank being connected to the overflow port.
[0006] Furthermore, the high-potassium mother liquor recovery device also includes a refined potassium delivery pipeline and a low-sodium delivery pipeline. The discharge end of the first delivery pipeline can be selectively connected to the feed end of the refined potassium delivery pipeline or the feed end of the low-sodium delivery pipeline. When the potassium chloride content of the solid-phase material in the solid-liquid separation device is greater than a preset value, the discharge end of the first delivery pipeline is connected to the feed end of the refined potassium delivery pipeline. When the potassium chloride content of the solid-phase material in the solid-liquid separation device is less than a preset value, the discharge end of the first delivery pipeline is connected to the feed end of the low-sodium delivery pipeline.
[0007] Furthermore, the high-potassium mother liquor recovery device also includes a second conveying pipeline and a first conveying pump, one end of the second conveying pipeline is connected to the first discharge port, the other end of the second conveying pipeline is connected to the second feed port, and the first conveying pump is installed on the second conveying pipeline.
[0008] Furthermore, there are multiple first recovery tanks, multiple second delivery pipelines and multiple first delivery pumps, and the multiple first recovery tanks are arranged in a one-to-one correspondence with the multiple second delivery pipelines. Each second delivery pipeline is provided with at least one first delivery pump.
[0009] Furthermore, the solid-liquid separation device also includes a tank body and a stirring mechanism, the second feed port and the second discharge port are both arranged on the tank body, and the stirring mechanism is arranged inside the tank body.
[0010] Furthermore, the solid-liquid separation device also includes a circulation pipeline, the feed end and the discharge end of the circulation pipeline are both connected to the inner cavity of the tank body, and a second delivery pump is arranged on the circulation pipeline.
[0011] Furthermore, a sampling port is also provided on the circulation pipeline.
[0012] Furthermore, the high-potassium mother liquor recovery device also includes a dehydration device.
[0013] Furthermore, the liquid phase recovery component also includes a third delivery pipeline and an overflow pipeline, one end of the overflow pipeline is connected to the overflow port, the other end of the overflow pipeline is connected to the liquid inlet end of the second recovery tank, one end of the third delivery pipeline is connected to the liquid outlet end of the second recovery tank, and a third delivery pump is arranged on the third delivery pipeline.
[0014] According to another aspect of the utility model, a potassium chloride production system is provided, comprising: a crystallizer; and the above-mentioned high-potassium mother liquor recovery device.
[0015] By applying the technical solution of the utility model, the high-potassium mother liquor enters the containing chamber through the first feed port and undergoes preliminary precipitation. The solid phase part containing potassium chloride and a small amount of clear liquid after precipitation are discharged through the first discharge port and then enter the solid-liquid separation device through the second feed port. After solid-liquid separation by the solid-liquid separation device, the liquid phase part flows out through the overflow port and enters the second recovery tank, thereby realizing the recovery of the liquid phase part in the high-potassium mother liquor, while the solid phase part enters the first conveying pipeline through the second discharge port, and then is discharged from the discharge end of the first conveying pipeline to the dehydration equipment. The dehydration equipment dehydrates the solid phase part, thereby realizing the effective recovery of the solid phase part after the precipitation of the high-potassium mother liquor. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0017] In the figure:
[0018] Figure 1 The schematic structural diagram of the potassium chloride production system according to the embodiment of the utility model is shown.
[0019] The above drawings include the following reference numerals:
[0020] 10. First recovery tank; 11. Accommodating chamber; 12. First delivery pump; 13. Second delivery pipeline; 14. Fourth delivery pump; 15. Fourth delivery pipeline; 16. Fifth delivery pipeline; 17. Fifth delivery pump; 20. Solid-liquid separation device; 21. Tank body; 22. Circulation pipeline; 23. Second delivery pump; 30. First delivery pipeline; 31. Fourth delivery pump; 40. Second recovery tank; 50. Refined potassium delivery pipeline; 60. Low sodium delivery pipeline; 70. Third delivery pipeline; 80. Third delivery pump; 90. Overflow pipeline; 100. Crystallizer; 200. Fine crystallizer. DETAILED DESCRIPTION
[0021] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0022] like Figure 1 As shown, the utility model provides a high-potassium mother liquor recovery device, which includes: a first recovery tank 10, having a accommodating chamber 11, the first recovery tank 10 includes a first feed port and a first discharge port connected to the accommodating chamber 11; a solid-liquid separation device 20, the solid-liquid separation device 20 includes a second feed port, a second discharge port and an overflow port, and the second feed port is selectively connected to the first discharge port; a first conveying pipeline 30, the feed end of the first conveying pipeline 30 is selectively connected to the second discharge port, and the discharge end of the first conveying pipeline 30 is constructed to be connected to a dehydration device; and a liquid phase recovery component, including a second recovery tank 40, the liquid inlet end of the second recovery tank 40 is connected to the overflow port.
[0023] In the present embodiment, the high-potassium mother liquor enters the containing chamber 11 through the first feed port and undergoes preliminary precipitation. The solid phase portion containing potassium chloride and a small amount of clear liquid after precipitation are discharged through the first discharge port and then enter the solid-liquid separation device 20 through the second feed port. After solid-liquid separation by the solid-liquid separation device 20, the liquid phase portion flows out through the overflow port and enters the second recovery tank 40, thereby realizing the recovery of the liquid phase portion in the high-potassium mother liquor, while the solid phase portion enters the first conveying pipeline 30 through the second discharge port, and is then discharged from the discharge end of the first conveying pipeline 30 to the dehydration equipment. The dehydration equipment dehydrates the solid phase portion, thereby realizing effective recovery of the solid phase portion after precipitation of the high-potassium mother liquor.
[0024] In one embodiment, the dehydration device is a centrifuge, and the specific structure of the centrifuge can adopt the existing technology and will not be described in detail here.
[0025] In one embodiment, the solid-liquid separation device 20 is a thickener or a centrifuge.
[0026] like Figure 1 As shown, in one embodiment of the utility model, the high potassium mother liquor recovery device also includes a refined potassium delivery pipeline 50 and a low sodium delivery pipeline 60, and the discharge end of the first delivery pipeline 30 can be selectively connected to the feed end of the refined potassium delivery pipeline 50 or the feed end of the low sodium delivery pipeline 60. When the potassium chloride content of the solid phase material in the solid-liquid separation device 20 is greater than a preset value, the discharge end of the first delivery pipeline 30 is connected to the feed end of the refined potassium delivery pipeline 50. When the potassium chloride content of the solid phase material in the solid-liquid separation device 20 is less than the preset value, the discharge end of the first delivery pipeline 30 is connected to the feed end of the low sodium delivery pipeline 60.
[0027] In this embodiment, the potassium chloride production process includes a refined potassium process and a low sodium process. The refined potassium process refers to a process step for further purifying a crude potassium chloride product to achieve a higher purity and quality standard. The low sodium process refers to a process step for reducing the sodium content in the potassium chloride product through a specific process step, thereby improving the purity of the product. Dehydration equipment is configured in both the refined potassium process and the low sodium process. The discharge end of the refined potassium conveying pipeline 50 is connected to the dehydration equipment configured for the refined potassium process, and the discharge end of the low sodium conveying pipeline 60 is connected to the dehydration equipment configured for the low sodium process.
[0028] During the recovery of the high-potassium mother liquor, the potassium chloride content in the solid phase part in the solid-liquid separation device 20 can be detected. If the potassium chloride content is greater than the preset value, the discharge end of the first conveying pipeline 30 is connected to the refined potassium conveying pipeline 50. At this time, the solid phase part of the high-potassium mother liquor after precipitation is discharged into the refined potassium conveying pipeline 50 through the discharge end of the first conveying pipeline 30, and then discharged to the dehydration equipment in the refined potassium process through the refined potassium conveying pipeline 50. If the potassium chloride content is less than the preset value, the discharge end of the first conveying pipeline 30 is connected to the low-sodium conveying pipeline 60. At this time, the solid phase part of the high-potassium mother liquor after precipitation is discharged into the low-sodium conveying pipeline 60 through the discharge end of the first conveying pipeline 30, and then discharged from the low-sodium conveying pipeline 60 to the dehydration equipment in the low-sodium process, thereby realizing effective recovery of the solid phase part after precipitation of the high-potassium mother liquor.
[0029] In one embodiment, the preset value ranges from 65% to 70%.
[0030] like Figure 1As shown, in one embodiment of the utility model, the high potassium mother liquor recovery device also includes a second conveying pipeline 13 and a first conveying pump 12, one end of the second conveying pipeline 13 is connected to the first discharge port, and the other end of the second conveying pipeline 13 is connected to the second feed port, and the first conveying pump 12 is installed on the second conveying pipeline 13.
[0031] Through the above arrangement, the solid phase part and the clear liquid after the precipitation of the high-potassium mother liquor in the containing chamber 11 can be transported to the solid-liquid separation device 20 for solid-liquid separation.
[0032] In one embodiment of the utility model, there are multiple first recovery tanks 10, multiple second delivery pipelines 13 and first delivery pumps 12, multiple first recovery tanks 10 are arranged in a one-to-one correspondence with multiple second delivery pipelines 13, and each second delivery pipeline 13 is provided with at least one first delivery pump 12.
[0033] Through the above arrangement, the transportation efficiency of the solid phase part and the clear liquid after the precipitation of the high-potassium mother liquor can be improved.
[0034] like Figure 1 As shown, in one embodiment of the utility model, the solid-liquid separation device 20 further includes a tank body 21 and a stirring mechanism, the second feed port and the second discharge port are both arranged on the tank body 21 , and the stirring mechanism is arranged inside the tank body 21 .
[0035] In this embodiment, the stirring mechanism is used to stir the solid phase and clear liquid after the precipitation of the high-potassium mother liquor in the tank body 21 to prevent the solid phase from being deposited at the bottom of the tank body 21 and being difficult to be discharged from the second discharge port.
[0036] like Figure 1 As shown, in one embodiment of the utility model, the solid-liquid separation device 20 also includes a circulation pipeline 22, the feed end and the discharge end of the circulation pipeline 22 are both connected to the inner cavity of the tank body 21, and a second delivery pump 23 is arranged on the circulation pipeline 22.
[0037] In this embodiment, the setting of the circulation pipeline 22 can strengthen the separation of the solid phase and the clear liquid, making the solid phase more easily settle to the bottom of the tank body 21. At the same time, it can also prevent the solid phase from accumulating at the bottom of the tank body 21 and being difficult to be discharged from the second discharge port.
[0038] In one embodiment of the present invention, a sampling port is also provided on the circulation pipeline 22 .
[0039] In this embodiment, the provision of the sampling port facilitates the detection of the potassium chloride content in the solid phase part in the solid-liquid separation device 20 .
[0040] like Figure 1 As shown, in one embodiment of the utility model, the high potassium mother liquor recovery device also includes a dehydration device.
[0041] In this embodiment, the dehydration device is used to dehydrate the solid phase material containing potassium chloride discharged from the discharge end of the first conveying pipeline 30 .
[0042] like Figure 1 As shown, in one embodiment of the utility model, the liquid phase recovery component also includes a third delivery pipeline 70 and an overflow pipeline 90, one end of the overflow pipeline 90 is connected to the overflow port, the other end of the overflow pipeline 90 is connected to the liquid inlet end of the second recovery tank 40, one end of the third delivery pipeline 70 is connected to the liquid outlet end of the second recovery tank 40, and a third delivery pump 80 is arranged on the third delivery pipeline 70.
[0043] In this embodiment, the liquid phase after solid-liquid separation by the solid-liquid separation device 20 enters the second recovery tank 40 through the overflow pipeline 90 to realize the recovery of the liquid phase in the high-potassium mother liquor. The liquid phase in the second recovery tank 40 can be discharged to the tailing salt pool or the sedimentation tank through the third conveying pipeline 70.
[0044] In one embodiment, a fourth delivery pump 31 is disposed on the first delivery pipeline 30 .
[0045] like Figure 1 As shown, according to another aspect of the present invention, a potassium chloride production system is provided, comprising: a crystallizer 100; and the above-mentioned high-potassium mother liquor recovery device.
[0046] In this embodiment, the potassium chloride production system further includes a fourth delivery pipeline 15 and a fourth delivery pump 14, the fourth delivery pump 14 is arranged on the fourth delivery pipeline 15, one end of the fourth delivery pipeline 15 is connected to the overflow port of the crystallizer 100, and the other end of the fourth delivery pipeline 15 is connected to the first feed port of the first recovery tank 10, and the overflow liquid at the overflow port is delivered to the containing chamber 11 through the fourth delivery pump 14 and the fourth delivery pipeline 15, and the overflow liquid enters the containing chamber 11 and undergoes preliminary precipitation, and the precipitated potassium chloride-containing The solid phase and a small amount of clear liquid are discharged through the first discharge port and enter the solid-liquid separation device 20 through the second feed port. After solid-liquid separation in the solid-liquid separation device 20, the liquid phase flows out through the overflow port and enters the second recovery tank 40, thereby realizing the recovery of the liquid phase in the overflow liquid, while the solid phase enters the first conveying pipeline 30 through the second discharge port, and is then discharged from the discharge end of the first conveying pipeline 30 to the dehydration equipment. The dehydration equipment dehydrates the solid phase, thereby realizing the effective recovery of the solid phase after the overflow liquid is precipitated.
[0047] It should be noted that the high-potassium mother liquor recovery device of the potassium chloride production system has all the technical solutions and all the technical effects of the above-mentioned high-potassium mother liquor recovery device, which will not be repeated here.
[0048] like Figure 1As shown, in one embodiment of the utility model, the potassium chloride production system also includes a fine crystal device 200 (a device for preparing fine crystals in a laboratory or industrial production, mainly used to control the conditions for crystal growth to obtain fine crystals with specific characteristics), a fifth delivery pipeline 16 and a fifth delivery pump 17, the fifth delivery pump 17 is arranged on the fifth delivery pipeline 16, one end of the fifth delivery pipeline 16 is connected to the overflow port of the fine crystal device 200, and the other end of the fifth delivery pipeline 16 is connected to the first feed port of the first recovery tank 10, and the overflow liquid at the overflow port of the fine crystal device 200 is discharged through the fifth delivery pump 17 through the fifth delivery pipeline 16. It is transported to the containing chamber 11. After the overflow liquid enters the containing chamber 11, it is initially precipitated. The solid phase part containing potassium chloride and a small amount of clear liquid after precipitation are discharged through the first discharge port and then enter the solid-liquid separation device 20 through the second feed port. After solid-liquid separation in the solid-liquid separation device 20, the liquid phase part flows out through the overflow port and enters the second recovery tank 40, so as to realize the recovery of the liquid phase part in the overflow liquid, while the solid phase part enters the first conveying pipeline 30 through the second discharge port, and then is discharged from the discharge end of the first conveying pipeline 30 to the dehydration equipment. The dehydration equipment dehydrates the solid phase part, so as to realize the effective recovery of the solid phase part after the precipitation of the overflow liquid.
[0049] From the above description, it can be seen that the above-mentioned embodiments of the utility model achieve the following technical effects: the high-potassium mother liquor enters the containing chamber through the first feed port and then undergoes preliminary precipitation, the precipitated solid phase part containing potassium chloride and a small amount of clear liquid are discharged through the first discharge port and then enter the solid-liquid separation device through the second feed port, after solid-liquid separation by the solid-liquid separation device, the liquid phase part flows out through the overflow port and enters the second recovery tank, thereby realizing the recovery of the liquid phase part in the high-potassium mother liquor, and the solid phase part enters the first conveying pipeline through the second discharge port, and then is discharged from the discharge end of the first conveying pipeline to the dehydration equipment, and the dehydration equipment dehydrates the solid phase part, thereby realizing the effective recovery of the solid phase part after the precipitation of the high-potassium mother liquor.
[0050] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A high potassium mother liquor recovery device, characterized in that: include: A first recovery tank (10) having a containing chamber (11), wherein the first recovery tank (10) comprises a first feed port and a first discharge port communicated with the containing chamber (11); A solid-liquid separation device (20), the solid-liquid separation device (20) comprising a second feed port, a second discharge port and an overflow port, the second feed port being selectively connected to the first discharge port; a first conveying pipeline (30), wherein a feed end of the first conveying pipeline (30) is selectively connected to the second discharge port, and a discharge end of the first conveying pipeline (30) is configured to be connected to a dehydration device; and The liquid phase recovery component comprises a second recovery tank (40), wherein the liquid inlet end of the second recovery tank (40) is connected to the overflow port.
2. The high potassium mother liquor recovery device according to claim 1, characterized in that: The high-potassium mother liquor recovery device further comprises a refined potassium delivery pipeline (50) and a low-sodium delivery pipeline (60); the discharge end of the first delivery pipeline (30) can be selectively connected to the feed end of the refined potassium delivery pipeline (50) or the feed end of the low-sodium delivery pipeline (60); when the potassium chloride content of the solid phase material in the solid-liquid separation device (20) is greater than a preset value, the discharge end of the first delivery pipeline (30) is connected to the feed end of the refined potassium delivery pipeline (50); when the potassium chloride content of the solid phase material in the solid-liquid separation device (20) is less than the preset value, the discharge end of the first delivery pipeline (30) is connected to the feed end of the low-sodium delivery pipeline (60).
3. The high potassium mother liquor recovery device according to claim 1, characterized in that: The high-potassium mother liquor recovery device further comprises a second delivery pipeline (13) and a first delivery pump (12), one end of the second delivery pipeline (13) being in communication with the first discharge port, the other end of the second delivery pipeline (13) being in communication with the second feed port, and the first delivery pump (12) being installed on the second delivery pipeline (13).
4. The high potassium mother liquor recovery device according to claim 3, characterized in that: The first recovery tank (10), the second delivery pipeline (13) and the first delivery pump (12) are all multiple, and the multiple first recovery tanks (10) and the multiple second delivery pipelines (13) are arranged in a one-to-one correspondence, and each of the second delivery pipelines (13) is provided with at least one first delivery pump (12).
5. The high potassium mother liquor recovery device according to claim 1, characterized in that: The solid-liquid separation device (20) further comprises a tank body (21) and a stirring mechanism, wherein the second feed port and the second discharge port are both arranged on the tank body (21), and the stirring mechanism is arranged inside the tank body (21).
6. The high potassium mother liquor recovery device according to claim 5, characterized in that: The solid-liquid separation device (20) further comprises a circulation pipeline (22), wherein both a feed end and a discharge end of the circulation pipeline (22) are in communication with the inner cavity of the tank body (21), and a second delivery pump (23) is provided on the circulation pipeline (22).
7. The high potassium mother liquor recovery device according to claim 6, characterized in that: The circulation pipeline (22) is also provided with a sampling port.
8. The high potassium mother liquor recovery device according to claim 1, characterized in that: The high potassium mother liquor recovery device also includes the dehydration equipment.
9. The high potassium mother liquor recovery device according to claim 1, characterized in that: The liquid phase recovery component further comprises a third delivery pipeline (70) and an overflow pipeline (90), one end of the overflow pipeline (90) being connected to the overflow port, the other end of the overflow pipeline (90) being connected to the liquid inlet end of the second recovery tank (40), one end of the third delivery pipeline (70) being connected to the liquid outlet end of the second recovery tank (40), and a third delivery pump (80) being arranged on the third delivery pipeline (70).
10. A potassium chloride production system, characterized in that: include: a crystallizer (100); and The high potassium mother liquor recovery device according to any one of claims 1 to 9.