Anti-blocking salt leg device for high solid content material evaporation system
By introducing a lateral extraction outlet, spiral guide ribs, and steam flushing unit into the salt leg unit, combined with online monitoring, the problem of crystal deposition and blockage in the processing of high solids content materials has been solved, achieving efficient and stable operation and low-cost maintenance of the unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HIMILE MECHANICAL MFG
- Filing Date
- 2025-06-13
- Publication Date
- 2026-07-03
AI Technical Summary
Existing salt leg equipment is prone to crystal deposition when processing materials with high solid content and easy crystallization, which leads to a reduction in the flow cross section or complete blockage. In addition, there is a lack of real-time monitoring methods, which affects the stability and operating efficiency of the system.
A salt leg anti-clogging device is designed, which combines a side outlet with bottom reflux, and incorporates a spiral guide rib and a steam flushing unit. The device disperses crystals through swirling motion to reduce the risk of deposition, and the device status is monitored in real time through an online monitoring module.
It effectively prevents crystal deposition and blockage, extends the device's operating cycle, improves operating efficiency and stability, and reduces maintenance costs.
Smart Images
Figure CN224442180U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chemical evaporation and crystallization equipment, specifically to an anti-clogging salt leg device for evaporation systems of high solid content materials. Background Technology
[0002] The salt leg is a core component for functions such as salt collection, grading, washing, and conveying. However, in actual operation, the vertically arranged structure of the salt leg causes crystals to settle and accumulate rapidly at the bottom and in the conical section under gravity. Especially when processing materials with high solids content and easy crystallization, "bridging" mechanical interlocks easily form between the crystals, leading to a sharp reduction in the flow cross-section or even complete blockage. This blockage not only affects the normal operation of the salt leg but also reduces the overall efficiency of the system.
[0003] Furthermore, conventional straight-through salt leg systems rely solely on intermittent flushing, which cannot prevent sedimentation and requires frequent shutdowns for manual unblocking. In addition, traditional salt leg devices lack real-time monitoring methods, making it impossible to predict blockage trends and resulting in delayed fault response, which affects the stability and operating efficiency of the system.
[0004] Current salt leg devices have shortcomings in crystal deposition and anti-clogging, leading to frequent unplanned shutdowns of the evaporation system, high maintenance costs, and fluctuating production capacity. Therefore, there is an urgent need for a salt leg device that integrates flow regulation and efficient anti-clogging.
[0005] In view of the problems existing in the prior art, this utility model combines years of design and use experience in related fields to design and manufacture an anti-clogging salt leg device for evaporation systems of high solid content materials, in order to overcome the above defects. Summary of the Invention
[0006] To address the problems existing in the prior art, this utility model provides an anti-clogging salt leg device for evaporation systems of high solid content materials. It can efficiently clear blockages, monitor the internal operating status of the salt leg in real time, and features long continuous operation cycle, high operating efficiency, and safety and reliability.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] A salt leg anti-clogging device for a high solids content material evaporation system includes a salt leg, a flushing unit on the salt leg, a lateral extraction port on the lower side wall of the salt leg, a reflux port at the bottom of the salt leg, and an extraction pump connected to the lateral extraction port via a lateral extraction pipe. The output end of the extraction pump includes a first outlet and a second outlet, and the first outlet is connected to the reflux port via a reflux pipe.
[0009] The axis of the lateral extraction pipe forms an angle α with the axis of the salt leg, where α is 30-45°. At the same time, the vertical distance from the axis of the lateral extraction outlet to the bottom of the salt leg is 1 / 3-1 / 2 of the total height of the salt leg.
[0010] Preferably, the lateral extraction pipe is provided with spiral guide ribs.
[0011] Preferably, the width of the spiral guide rib is 1 / 10 to 1 / 8 of the inner diameter of the lateral extraction pipe, and the pitch of the spiral guide rib is 1.2 to 1.5 times the inner diameter of the lateral extraction pipe.
[0012] Preferably, the spiral guide rib is a single spiral, double spiral, or multi-spiral structure.
[0013] Preferably, the bottom of the salt leg has a tapered section, and the ratio of the length of the tapered section to the inner diameter of the top of the tapered section is 1.5:1-2:1.
[0014] Preferably, the rinsing unit includes at least two steam rinsing ports, and a plurality of the steam rinsing ports are evenly distributed along the circumference of the salt leg. Each steam rinsing port is provided with a nozzle, and the axis of the nozzle forms an angle β with the axis of the salt leg, where β is 40-75°.
[0015] Preferably, the rinsing unit includes 2-6 steam rinsing ports, and each steam rinsing port is also provided with a steam rinsing pipe. The angle between the projections of the axes of two adjacent steam rinsing pipes on the horizontal plane is γ, where γ is 60-120°.
[0016] Preferably, it also includes an online monitoring module, which includes an observation hole and a high-definition camera. The observation hole is located on the side wall of the salt leg, and the high-definition camera is located on the inner side of the observation hole. The axis of the observation hole forms an angle θ with the axis of the lateral extraction outlet, where θ is 90°.
[0017] Preferably, the axis of the observation hole and the axis of the steam rinsing port are circumferentially misaligned by at least 30° on the salt leg, and the bottom end of the observation hole is not lower than the bottom end of the steam rinsing port.
[0018] Preferably, the steam flushing pipe is equipped with a flushing port valve, and the return pipe is equipped with a return valve;
[0019] The online monitoring module also includes an image processing unit, which is electrically connected to the high-definition camera, the reflux valve, and the flushing port valve.
[0020] The advantages of this utility model are:
[0021] 1. This utility model utilizes a combination of lateral production outlet and bottom recirculation to synergistically suppress blockage. By limiting the installation angle and height of the lateral production pipe, it synergistically reduces the vertical flow velocity of the concentrated slurry, weakening the tendency for crystal deposition. Simultaneously, it ensures that the concentrated slurry forms a certain flow velocity and swirling motion when entering the lateral production pipe. This swirling motion disperses the crystals, enhances the mixing effect of the concentrated slurry, reduces the residence time of crystals near the lateral production outlet, lowers the risk of crystal deposition and blockage of the lateral production outlet, improves crystal quality, and effectively avoids salt leg bridging and blockage problems caused by the gradual accumulation of crystals, thereby extending the continuous operation cycle. Part of the concentrated slurry is recirculated through the bottom recirculation port of the salt leg, maintaining the upward tumbling of the concentrated slurry and significantly reducing the amount of crystal deposition.
[0022] 2. This utility model guides the concentrated slurry in the lateral extraction pipe to flow along the spiral path by setting spiral guide ribs inside the lateral extraction pipe, thereby reducing the tangential velocity of the concentrated slurry, reducing the direct collision between the concentrated slurry and the pipe wall, and reducing flow resistance. By optimizing the width and pitch of the spiral guide ribs, crystal deposition can be effectively suppressed, and blockage of the discharge pipe can be prevented, thereby improving operating efficiency and extending the operating cycle of the device.
[0023] 3. This utility model is equipped with a flushing unit that uses a steam flushing port to introduce high-temperature and high-pressure steam into the salt leg. On the one hand, the high-pressure impact force of the steam effectively removes the crystals deposited on the pipe wall and the conical section; on the other hand, the high-temperature characteristics of the steam cause the deposited crystals to dissolve rapidly, and the multi-angle steam jet directly impacts the inner wall of the conical section, which improves the removal efficiency of hard scale and effectively avoids the salt leg bridging and blockage problems caused by the gradual accumulation of crystals, thus significantly improving the operational stability and service life of the equipment.
[0024] 4. This utility model enables real-time observation of the internal condition of the salt leg through an online monitoring module, which significantly improves the system's operational reliability and maintenance efficiency while reducing maintenance costs. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the device used in Embodiment 1 of this utility model.
[0026] Figure 2 This is a schematic diagram of the device used in Embodiment 1 of this utility model.
[0027] Figure 3 This is a schematic diagram of the cross-section of the device used in Embodiment 1 of this utility model.
[0028] Figure 4 This is a schematic diagram of the device used in Embodiment 2 of this utility model.
[0029] Figure 5 This is a partial schematic diagram of the device used in Embodiment 3 of this utility model.
[0030] Figure 6 This is a schematic diagram of the device used in Embodiment 4 of this utility model.
[0031] Figure 7 This is a schematic diagram of the device used in Embodiment 5 of this utility model.
[0032] Figure 8 This is a top view of the device used in Embodiment 5 of this utility model.
[0033] Figure 9 This is a functional block diagram of the image processing unit in the device used in Embodiments 4 and 5 of this utility model.
[0034] In the diagram: 1-Salt leg, 2-Lateral production outlet, 3-Return port, 4-Flushing unit, 5-Online monitoring module, 6-Production pump, 21-Spiral guide rib, 22-Lateral production outlet pipe, 31-Return valve, 41-First steam flushing pipe, 42-Second steam flushing pipe, 43-Third steam flushing pipe, 44-Fourth steam flushing pipe, 45-Fifth steam flushing pipe, 46-Sixth steam flushing pipe, 51-Observation hole, 52-High-definition camera, 411-First flushing port valve, 412-Second flushing port valve. Detailed Implementation
[0035] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0036] like Figures 1-9 As shown, an anti-clogging salt leg device for a high-solids-content material evaporation system includes a salt leg 1, a flushing unit 4 on the salt leg 1, a lateral extraction port 2 on the lower side wall of the salt leg 1, and a return port 3 at the bottom of the salt leg 1. A lateral extraction pipe 22 is connected to the lateral extraction port 2, and an extraction pump 6 is connected to the lateral extraction port 22. The output end of the extraction pump 6 includes a first outlet and a second outlet. The first outlet is connected to the return port 3 through the return pipe, and the second outlet is the discharge port of the salt leg 1. The axis of the lateral extraction pipe 22 forms an angle α with the axis of the salt leg 1, where α is 30-45°. At the same time, the vertical distance from the axis of the lateral extraction port 2 to the bottom of the salt leg 1 is 1 / 3 to 1 / 2 of the total height of the salt leg 1.
[0037] This invention uses a combination of lateral outlet 2 and bottom reflux to suppress blockage. The lateral outlet 2 extracts concentrated slurry through the extraction pump 6, and part of the concentrated slurry enters the salt leg 1 through the reflux port 3, so that the concentrated slurry at the bottom of the salt leg 1 is always in an upward rolling state, which effectively prevents crystals from agglomerating at the bottom of the salt leg 1 or from "bridging" mechanical interlocking. The installation angle of the lateral extraction pipe 22 and the height of the lateral extraction outlet 2 work together to reduce the vertical velocity component of the crystals. Specifically, the angle design of the lateral extraction pipe 22 can reduce the vertical velocity component of the crystals, slow down the rate at which the crystals settle due to gravity, weaken the tendency of crystal deposition, thereby improving the crystal extraction efficiency and effectively avoiding bridging and blockage problems of the salt leg 1 caused by the gradual accumulation of crystals. By controlling the height difference between the salt leg 1 and the lateral extraction outlet 2, the concentrated slurry forms a certain flow velocity and swirling motion when entering the lateral extraction outlet 2. The swirling motion disperses the crystals, reduces the vertical flow velocity, enhances the mixing effect of the concentrated slurry, reduces the residence time of crystals near the lateral extraction outlet 2, reduces the risk of crystal deposition and blockage of the lateral extraction outlet 2, improves the quality of crystals, and improves the operating cycle and efficiency of the unit.
[0038] To prevent crystal deposition within the lateral extraction pipe 22, reduce residence time, and lower the risk of blockage, in one embodiment of this invention, a spiral guide rib 21 is provided within the lateral extraction pipe 22. This guide rib guides the concentrated slurry flowing from the lateral extraction outlet 2 along a spiral path, reducing the tangential velocity of the concentrated slurry, minimizing direct collision between the concentrated slurry and the pipe wall, and reducing flow resistance. By optimizing the width and pitch of the spiral guide rib 21, crystal deposition can be effectively suppressed, preventing blockage of the lateral extraction pipe 22, thereby improving operating efficiency and extending the operating cycle of the device. The width of the spiral guide rib 21 is preferably 1 / 10 to 1 / 8 of the inner diameter of the lateral extraction pipe 22, and the pitch of the spiral guide rib 21 is preferably 1.2 to 1.5 times the inner diameter of the lateral extraction pipe 22. The spiral guide rib 21 can be a single spiral, double spiral, or multi-spiral structure.
[0039] To maintain the flow at the bottom of the salt leg 1 and prevent clogging, in one embodiment of this invention, the bottom of the salt leg 1 has a conical tapered section. The turbulence generated by the conical tapered section enhances the mixing effect of the concentrated slurry, ensuring uniform suspension of crystal particles. Simultaneously, the auxiliary return port 3's return mechanism buffers flow fluctuations and maintains system stability. The ratio of the length of the conical tapered section to the inner diameter of its tip is preferably 1.5:1-2:1.
[0040] The rinsing unit 4 includes at least two steam rinsing ports, and several steam rinsing ports are evenly distributed around the circumference of the salt leg 1. Each steam rinsing port is equipped with a nozzle (not shown in the figure), and the axis of the nozzle forms an angle β with the axis of the salt leg 1, where β is 40-75°. This invention, by limiting the number of steam rinsing ports and the installation angle of the nozzles, can expand the steam coverage area, reduce rinsing blind spots, and allow the steam to act directly on the deposited crystals on the pipe wall and the tapered section of the salt leg 1 with a strong impact force, effectively removing the deposited crystals. Simultaneously, the thermal energy of the steam rapidly dissolves or softens the deposited crystals, effectively preventing bridging and clogging problems in the salt leg 1 caused by the gradual accumulation of crystals.
[0041] To further improve the rinsing efficiency of the rinsing unit 4, prevent secondary crystal deposition and clogging of the salt leg 1, and further enhance the overall operating efficiency and safety of the device, in one embodiment of this utility model, the rinsing unit 4 includes 2-6 steam rinsing ports, each equipped with a steam rinsing pipe. The angle between the projections of the axes of two adjacent steam rinsing pipes on the horizontal plane is γ, which is 60-120°. This allows the high-temperature, high-pressure steam to more evenly cover all parts of the inner wall of the salt leg 1, ensuring no dead corners during the rinsing process and improving cleaning efficiency. The multi-angled steam rinsing pipes can also generate a strong turbulence effect, enhancing the rinsing force, efficiently removing deposited crystals, and preventing device blockage. Furthermore, the steam can more directly transfer heat energy to the crystals attached to the pipe wall and the tapered section of the salt leg 1, reducing heat loss and improving heat utilization efficiency and the safety and reliability of the device.
[0042] To monitor the internal condition of the salt leg 1 in real time, in one embodiment of this invention, the device further includes an online monitoring module 5. The online monitoring module 5 includes an observation hole 51 and a high-definition camera 52. The observation hole 51 is located on the side wall of the salt leg 1, and the high-definition camera 52 is mounted on the inner side of the observation hole 51. The axis of the observation hole 51 forms an angle θ with the axis of the lateral extraction outlet 2, where θ is 90°. By acquiring real-time images of the internal flow through the high-definition camera 52, the 90° angle between the observation hole 51 and the lateral extraction outlet 2 effectively reduces blind spots, ensuring that technicians can clearly observe the material state and device operation inside the salt leg 1 and at the lateral extraction outlet 2. It also reduces the direct impact of concentrated slurry flowing out of the lateral extraction outlet 2 on the observation hole 51, ensuring the clarity and service life of the observation hole 51, improving operational safety, and enhancing the reliability of the device.
[0043] In one embodiment of this invention, the axis of the observation hole 51 is circumferentially offset from the axis of the steam flushing port by at least 30° on the salt leg 1, and the bottom end of the observation hole 51 is not lower than the bottom end of the steam flushing port. By defining the relative position of the observation hole 51 and the steam flushing port, contamination and damage to the observation hole 51 by steam jets are avoided, while ensuring that the observation field of view covers the key deposition area. This optimizes the fluid dynamics inside the equipment, reduces eddies and local pressure fluctuations caused by steam flushing, improves the safety of the device, and ensures the observation effect and flushing efficiency.
[0044] In one embodiment of this utility model, a flushing port valve is provided on the steam flushing pipe, and a return valve 31 is provided on the return pipe. The online monitoring module 5 also includes an image processing unit, which is used to collect flow images. The image processing unit has a built-in flow analysis program and is connected to the high-definition camera 52, the return valve 31, and the flushing port valve. The image processing unit is used to collect flow images, and the flow analysis program identifies information such as the flow pattern and crystal distribution of the concentrated slurry by analyzing the data. Based on the information, it outputs corresponding control signals, which are transmitted to the return valve 31 and the flushing port valve. By adjusting the opening of the return valve 31, parameters such as the return ratio are controlled, so that the concentrated slurry forms a bottom-up tumbling flow in the salt leg 1. At the same time, parameters such as the steam intake and pressure are controlled by adjusting the flushing port valve. In addition, in emergency mode, the steam flushing port can be switched to pulse jet mode to enhance the scale layer breaking effect.
[0045] In this invention, the various components of the device, such as the spiral guide ribs, high-definition camera, flow analysis program, etc., can all be purchased from the market, but the entire device cannot be purchased from the market and is not known to those skilled in the art. Example 1
[0046] This embodiment provides an anti-clogging salt leg device for an evaporation system for high-solids-content materials, as shown in the schematic diagram below. Figures 1-3As shown, the structure includes a salt leg 1, a lateral extraction outlet 2, a return outlet 3, a flushing unit 4, and an extraction pump 6. The lateral extraction outlet 2 is equipped with a lateral extraction pipe 22. The flushing unit 4 includes three steam flushing ports, which are evenly distributed around the circumference of the salt leg 1. Each steam flushing port is equipped with a first steam flushing pipe 41, a second steam flushing pipe 42, and a third steam flushing pipe 43. Each steam flushing port is equipped with a nozzle. The angle β between the axis of each nozzle and the axis of the salt leg 1 is 45°. The angle γ between the projections of the axes of two adjacent steam flushing pipes on the horizontal plane is 120°. The angle α between the axis of the lateral extraction pipe 22 and the axis of the salt leg 1 is 30°. The vertical distance from the axis of the lateral extraction outlet 2 to the bottom of the salt leg 1 is 1 / 3 of the total height of the salt leg 1. The bottom of the salt leg 1 has a conical tapered section, and the ratio of the length of the conical tapered section to the inner diameter of the top of the conical tapered section is 1.5:1. The extraction pump 6 includes a first outlet and a second outlet. The lateral extraction pipe 22 is connected to the input end of the extraction pump 6. The first outlet is connected to the return port 3 through the return pipe, and the second outlet is the discharge port of the salt leg 1.
[0047] After the slurry enters salt leg 1, it recrystallizes within it, causing the crystals to grow and develop a more complete shape. High-temperature, high-pressure steam is introduced through three steam flushing ports, directly acting on the deposited crystals on the inner wall of salt leg 1 and the conical tapering section. Simultaneously, the heat energy of the steam rapidly dissolves or softens the deposited crystals, causing them to fall to the bottom of salt leg 1. The concentrated slurry containing mature crystals is extracted through the extraction pump 6 via the side extraction port 2. Part of the concentrated slurry enters salt leg 1 from the first outlet through the return port 3 at the bottom of the conical tapering section, keeping the slurry at the bottom of salt leg 1 in an upward tumbling state. Part of the concentrated slurry is discharged through the second outlet of the extraction pump. This device effectively avoids bridging and clogging problems in salt leg 1 caused by the gradual accumulation of crystals, improving the operating cycle and efficiency of the unit. Example 2
[0048] This embodiment provides an anti-clogging salt leg device for an evaporation system for high-solids-content materials, as shown in the schematic diagram below. Figure 4 As shown, the difference from Embodiment 1 is that the flushing unit 4 in this embodiment includes six steam flushing ports. Each steam flushing port is provided with a first steam flushing pipe 41, a second steam flushing pipe 42, a third steam flushing pipe 43, a fourth steam flushing pipe 44, a fifth steam flushing pipe 45, and a sixth steam flushing pipe 46. The projection angle γ between the axes of two adjacent steam flushing pipes on the horizontal plane is 60°. The angle β between the nozzle axis of each steam flushing port and the axis of the salt leg 1 is 40°. The angle α between the axis of the lateral extraction pipe 22 and the axis of the salt leg 1 is 45°. The vertical distance from the axis of the lateral extraction outlet 2 to the bottom of the salt leg 1 is 1 / 2 of the total height of the salt leg 1. The ratio of the length of the conical tapered section to the inner diameter of the top of the conical tapered section is 2:1.
[0049] Based on Example 1, after the slurry enters salt leg 1, it recrystallizes within salt leg 1, causing the crystals in the slurry to grow continuously and develop a more complete crystal shape. High-temperature, high-pressure steam is introduced through six steam flushing ports. The steam acts directly on the deposited crystals on the pipe wall and the tapered section of salt leg 1 with a strong impact force, simultaneously dissolving or softening the deposited crystals rapidly. This device ensures a thorough flushing process, improves cleaning efficiency, maintains the flow state at the bottom of salt leg 1, prevents device blockage, and enhances thermal energy utilization efficiency and the safety and reliability of the device. Example 3
[0050] This embodiment provides an anti-clogging salt leg device for an evaporation system of high solids content materials, as shown in the partial structural schematic diagram below. Figure 5 As shown, the difference from Embodiment 1 is that the inner wall of the lateral extraction pipe 22 in this embodiment is also provided with a spiral guide rib 21. The width of the spiral guide rib 21 is 1 / 10 of the inner diameter of the lateral extraction pipe 22, and the pitch is 1.2 times the inner diameter of the lateral extraction pipe 22. The flushing unit 4 includes two steam flushing ports, and each steam flushing port is provided with a first steam flushing pipe 41 and a second steam flushing pipe 42. The angle β between the nozzle axis of each steam flushing port and the axis of the salt leg 1 is 75°. The angle γ between the projections of the axes of two adjacent steam flushing pipes on the horizontal plane is 90°. The spiral guide rib 21 adopts a single spiral structure.
[0051] Based on Example 1, high-temperature, high-pressure steam is introduced into the salt leg 1 through two steam flushing ports. The steam acts directly on the deposited crystals on the pipe wall and the tapered section of the salt leg 1 with a strong impact force, simultaneously dissolving or softening the deposited crystals rapidly. When discharging from the side outlet 2, the slurry is guided along a spiral path by spiral guide ribs 21, reducing the tangential velocity of the concentrated slurry, minimizing direct collision between the concentrated slurry and the pipe wall, reducing flow resistance, effectively inhibiting crystal deposition, preventing blockage, thereby improving the operating efficiency of the unit and extending its operating cycle. Example 4
[0052] This embodiment provides an anti-clogging salt leg device for an evaporation system for high-solids-content materials, as shown in the schematic diagram below. Figure 6 , Figure 9As shown, the difference from Embodiment 1 is that this embodiment also includes an online monitoring module 5, a return valve 32 on the return pipe, and a rinsing unit 4 containing two steam rinsing ports. Each steam rinsing port is equipped with a first steam rinsing pipe 41 and a second steam rinsing pipe 42. The angle β between the nozzle axis of each steam rinsing port and the axis of the salt leg 1 is 45°, and the angle γ between the projections of the axes of two adjacent steam rinsing pipes on the horizontal plane is 90°. A first rinsing port valve 411 is installed on the first steam rinsing pipe 41, and a second rinsing port valve 421 is installed on the second steam rinsing pipe 42. The online monitoring module 5 includes an observation hole 51, a high-definition camera 52, and an image processing unit. The angle θ between the axis of the observation hole 51 and the axis of the lateral sampling outlet 2 is 90°. The axis of the observation hole 51 is circumferentially offset by 90° from the axis of the steam flushing port on the first steam flushing pipe 41. The bottom end of the observation hole 51 is higher than the bottom end of the steam flushing port. The high-definition camera 52 is installed on the inner side of the observation hole 51. The image processing unit has a built-in flow analysis program. The image processing unit is electrically connected to the high-definition camera 52, the reflux valve 32, the first flushing port valve 411, and the second flushing port valve 421.
[0053] Based on Example 1, high-temperature and high-pressure steam is introduced into the salt leg 1 through two steam flushing ports. The steam acts directly on the deposited crystals on the pipe wall and the conical tapering section of the salt leg 1 with a strong impact force, and at the same time, it rapidly dissolves or softens the deposited crystals. The high-definition camera 52 of the salt leg 1 collects internal flow images in real time. After the image processing unit collects the flow images, its built-in flow analysis program analyzes the data to identify the flow pattern, crystal distribution, and other information of the concentrated slurry, and outputs corresponding control signals accordingly. The control signals are transmitted to the reflux valve 32 and the first flushing port valve 411 and the second flushing port valve 421. By adjusting the opening of the reflux valve 32, the reflux ratio and other parameters are controlled, so that the concentrated slurry forms a bottom-up tumbling flow in the salt leg 1. At the same time, the steam intake and pressure parameters are controlled by adjusting the first flushing port valve 411 and the second flushing port valve 421. The device provided in this embodiment integrates efficient blockage clearing, real-time monitoring and control functions. The device effectively avoids blockage problems through an efficient blockage clearing mechanism. Combined with real-time monitoring and control functions, it accurately regulates the device's operating parameters, ensuring that the device is continuously in a state of efficient operation. At the same time, by reducing equipment failures and maintenance frequency, the device maintenance cost is reduced, and the overall economic benefits are improved. Example 5
[0054] This embodiment provides an anti-clogging salt leg device for an evaporation system for high-solids-content materials, as shown in the schematic diagram below. Figures 7-9 As shown, the difference from Embodiment 4 is that the inner wall of the lateral extraction pipe 22 in this embodiment is provided with a spiral guide rib 21. The width of the spiral guide rib 21 is 1 / 8 of the inner diameter of the pipe, and the pitch is 1.5 times the diameter of the pipe.
[0055] Based on Example 4, when discharging from the lateral outlet 2, the slurry is guided along a spiral path by the spiral guide rib 21, reducing the tangential velocity of the concentrated slurry, minimizing direct collisions between the concentrated slurry and the pipe wall, reducing flow resistance, and preventing crystals from remaining and accumulating inside the pipe. The device provided in this embodiment integrates flow regulation, efficient unblocking, real-time monitoring and control, avoiding device blockage, extending the continuous operation cycle of the device, improving the operating efficiency of the device, and ensuring the safe operation of the device.
[0056] Comparative Example 1
[0057] A salt leg device, which differs from Example 5 in that the nozzle axis of the steam flushing port is at a 30° angle to the axis of the salt leg 1, is otherwise the same. During operation, this salt leg device exhibits crystal blockage above the steam flushing port within the same time frame as the steam flushing in Example 5.
[0058] Comparative Example 2
[0059] A salt leg device, which differs from Embodiment 5 in that the rinsing unit is a steam rinsing port, but the rest is the same. During operation, crystals gradually adhere to the wall of the salt leg 1 pipe and the tapered section, clogging the device.
[0060] Comparative Example 3
[0061] A salt leg device differs from Embodiment 5 in that the axis of the lateral extraction pipe 22 forms a 90° angle with the axis of the salt leg 1. The other contents are the same. When the concentrated slurry enters the lateral extraction outlet 2 from the salt leg 1, it is subjected to a large impact force, which causes the lateral extraction outlet 2 to deform, reducing the service life of the device. Furthermore, when the concentrated slurry turns at 90°, the crystals in the concentrated slurry will adhere to the inner wall of the salt leg 1, gradually accumulate, and block the lateral extraction outlet 2.
[0062] Comparative Example 4
[0063] A salt leg device, which differs from Example 5 in that the ratio of the length of the conical tapered section at the bottom of the salt leg 1 to the inner diameter of the top of the conical tapered section is 1:1, while the other contents are the same. The concentrated slurry is subjected to weaker shearing and stirring effects in the conical tapered section, resulting in insufficient acceleration, reduced flow rate of the concentrated slurry, and affected mixing effect of the concentrated slurry, leading to inconsistent crystal quality.
[0064] Comparative Example 5
[0065] A salt leg device differs from Embodiment 5 in that the width of the spiral guide rib 21 is 3 / 40 of the inner diameter of the lateral extraction pipe 22, and the pitch is 1.8 times the diameter of the lateral extraction pipe 22. All other aspects are the same. When the concentrated slurry is extracted from the lateral extraction outlet 2 through the spiral guide rib 21, the spiral guide rib 21, with a width of 3 / 40 of the pipe's inner diameter, reduces the contact area between the concentrated slurry and the spiral guide rib 21, reducing the thrust of the concentrated slurry during transport. This causes crystals to accumulate on both sides of the spiral guide rib 21. The large pitch of the spiral guide rib 21 causes crystals in the concentrated slurry to accumulate between the spiral guide ribs 21, ultimately blocking the lateral extraction outlet 2.
[0066] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.
Claims
1. An anti-clogging salt leg device for a high solids material evaporation system, comprising: The system includes a salt leg (1), which is equipped with a flushing unit (4). The lower side wall of the salt leg (1) is provided with a lateral extraction outlet (2). The bottom of the salt leg (1) is provided with a return port (3). The lateral extraction outlet (2) is connected to an extraction pump (6) through a lateral extraction pipe (22). The output end of the extraction pump (6) includes a first outlet and a second outlet. The first outlet is connected to the return port (3) through a return pipe. The axis of the lateral extraction pipe (22) forms an angle α with the axis of the salt leg (1), where α is 30-45°. At the same time, the vertical distance between the axis of the lateral extraction outlet (2) and the bottom of the salt leg (1) is 1 / 3-1 / 2 of the total height of the salt leg (1).
2. The anti-clogging salt leg device for a high solids evaporation system of claim 1, wherein, The lateral extraction pipe (22) is provided with a spiral guide rib (21).
3. The anti-clogging salt leg device for a high solids evaporation system of claim 2, wherein, The width of the spiral guide rib (21) is 1 / 10 to 1 / 8 of the inner diameter of the lateral extraction pipe (22), and the pitch of the spiral guide rib (21) is 1.2 to 1.5 times the inner diameter of the lateral extraction pipe (22).
4. The anti-clogging salt leg device for an evaporation system of high solids content materials according to claim 2, characterized in that, The spiral guide rib (21) is a single spiral, double spiral or multi-spiral structure.
5. The anti-clogging salt leg device for high solids evaporation system of claim 1, wherein, The bottom of the salt leg (1) has a tapered section, and the ratio of the length of the tapered section to the inner diameter of the top of the tapered section is 1.5:1-2:
1.
6. The anti-clogging leg device for a high solids evaporation system of claim 1, wherein, The rinsing unit (4) includes at least two steam rinsing ports, and a plurality of the steam rinsing ports are evenly distributed around the circumference of the salt leg (1). The steam rinsing ports are provided with nozzles, and the axis of the nozzles forms an angle β with the axis of the salt leg (1), where β is 40-75°.
7. The anti-clogging salt leg device for a high solids material evaporation system of claim 6, wherein, The rinsing unit (4) includes 2-6 steam rinsing ports, and each steam rinsing port is also provided with a steam rinsing pipe. The angle between the projections of the axes of two adjacent steam rinsing pipes on the horizontal plane is γ, where γ is 60-120°.
8. The anti-clogging salt leg device for a high solids evaporation system of claim 7, wherein, It also includes an online monitoring module (5), which includes an observation hole (51) and a high-definition camera (52). The observation hole (51) is located on the side wall of the salt leg (1), and the high-definition camera (52) is located on the inner side of the observation hole (51). The axis of the observation hole (51) forms an angle θ with the axis of the lateral extraction outlet (2), where θ is 90°.
9. The anti-clogging salt leg device for a high solids material evaporation system of claim 8, wherein, The axis of the observation hole (51) is circumferentially misaligned with the axis of the steam flushing port on the salt leg (1) by at least 30°, and the bottom of the observation hole (51) is not lower than the bottom of the steam flushing port.
10. The anti-clogging salt leg device for a high solids evaporation system of claim 9, wherein, The steam flushing pipe is equipped with a flushing port valve, and the return pipe is equipped with a return valve (31). The online monitoring module (5) also includes an image processing unit, which is electrically connected to the high-definition camera (52), the reflux valve (31), and the flushing port valve.