A salt leg device

Abstract

This utility model discloses a salt leg device, comprising a salt leg body, a feed inlet at the top of the salt leg body, a discharge outlet at the lower middle part of the salt leg body, a return outlet, a first washing outlet, a second washing outlet, a vent at the bottom of the salt leg body, and a venting and rinsing outlet on the bottom side wall; the discharge outlet is located above the return outlet, and the discharge outlet and return outlet are distributed on both sides of the salt leg body, the front end of the discharge outlet is a downward sloping bevel, and the front end of the return outlet is an upward sloping bevel; the first washing outlet is located above the discharge outlet, the second washing outlet is located below the return outlet, and the first washing outlet and the second washing outlet are distributed on both sides of the salt leg body, the front end of the first washing outlet is a downward sloping bevel, and the front end of the second washing outlet is an upward sloping bevel; the venting and rinsing outlet is located below the second washing outlet. This utility model aims to solve the problem of easy clogging in salt leg devices.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a salt leg device. Background Technology

[0002] Coking wastewater contains a large amount of inorganic salts due to the characteristics of its materials, and cannot be discharged directly. Therefore, it is necessary to pre-treat the materials inside before discharge. Existing coking wastewater often needs to be treated by evaporation and crystallization.

[0003] A utility model patent with publication number CN222118918U discloses a salt leg device and an evaporator / crystallizer having the same. The device includes a salt leg body, a washing pipeline, and a discharge pipeline. The salt leg body has a washing chamber inside, and an inlet is located at the top. The washing pipeline is connected to the salt leg body and includes a first branch, a second branch, and a third branch arranged sequentially from top to bottom along the salt leg body. The discharge pipeline is located at the bottom of the salt leg body. In use, although the reflux flow rate and reflux position can be adjusted according to the solid content of the salt leg, and the quality of the output salt can be improved by controlling the reflux flow rate of the washing liquid, salt buildup at the bottom of the salt leg easily causes blockages, and the reflux of the washing brine on the same side can easily create a dead zone on the other side. Utility Model Content

[0004] The main purpose of this invention is to provide a salt leg device that solves the technical problem of easy clogging in existing salt leg devices.

[0005] To achieve the above objectives, this utility model provides a salt leg device, which includes a salt leg body, a feed inlet located at the top of the salt leg body, a discharge outlet located in the middle and lower part of the salt leg body, a return outlet, a first washing outlet, a second washing outlet, a venting outlet located at the bottom of the salt leg body, and a venting and rinsing outlet located on the bottom side wall.

[0006] The discharge port is located above the return port, and the discharge port and the return port are distributed on both sides of the salt leg body. The front end of the discharge port is a downward sloping bevel to guide the salt slurry downward to be discharged, and the front end of the return port is an upward sloping bevel to guide the washing liquid upward to be returned.

[0007] The first washing port is located above the discharge port, the second washing port is located below the return port, and the first washing port and the second washing port are distributed on both sides of the main body of the salt leg. The front end of the first washing port is a downward sloping bevel, and the front end of the second washing port is an upward sloping bevel.

[0008] The venting and rinsing port is located below the second rinsing port.

[0009] Optionally, the device further includes a thermometer test port located in the corresponding area of ​​the salt leg body between the discharge port and the first washing port.

[0010] Optionally, the opening direction of the first washing port forms an angle of 30°-40° with the horizontal direction, the opening direction of the second washing port forms an angle of 30°-40° with the horizontal direction, and the axes of the downward-sloping bevel of the first washing port and the upward-sloping bevel of the second washing port intersect to form a counter-angle of 60°-120°.

[0011] Optionally, the discharge port and the return port are connected in series via an external pipeline, and the discharge port and the return port are also connected to corresponding control valves and flow meters, respectively.

[0012] Optionally, the first washing port and the second washing port are connected in parallel through external pipes, and the first washing port and the second washing port are also connected to corresponding flow regulating devices.

[0013] Optionally, the opening direction of the discharge port forms an angle of 30°-40° with the horizontal direction, the opening direction of the return port forms an angle of 30°-40° with the horizontal direction, and the axes of the downward-sloping bevel of the discharge port and the upward-sloping bevel of the return port intersect to form a counter-current angle of 60-120°.

[0014] Optionally, the device further includes a first sight glass and a second sight glass, the first sight glass being located below the feed inlet; the second sight glass being located in the corresponding area of ​​the salt leg body between the discharge outlet and the reflux outlet.

[0015] Optionally, the device further includes a rotary hand hole located at the bottom of the salt leg body, above the venting and rinsing port.

[0016] Optionally, the salt leg body consists of an upper cylindrical body and a lower stacked body.

[0017] Optionally, the length-to-diameter ratio of the cylindrical body is 2:1-4:1, the height of the lower stack is 1 / 3-1 / 2 of the height of the cylindrical body, and its cone angle is 50°-60°.

[0018] Beneficial effects:

[0019] This device, through improvements to the discharge port, reflux port, and rinsing port, not only solves the problem of pipe blockage but also effectively controls the flow direction of salt, promoting the yield of secondary nucleation of salt within the salt leg. The rotary handhole, vent port, and vent flushing port also effectively address salt leg blockage, thus maintaining stable system operation. The added thermometer test port measures the temperature of the material inside the salt leg, providing effective feedback on the solids content. Therefore, the entire system comprehensively solves industry pain points such as salt leg blockage, uncontrolled solids content, and dead zone formation, significantly improving the stability and continuity of the evaporation crystallization system, thereby increasing processing efficiency and reducing costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the salt leg device of this utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the internal flow direction of the salt leg device.

[0023] Explanation of icon numbers:

[0024] label name label name 1 Salted Leg Body 11 feed inlet 2 flange 3-1 discharge port 3-2 Reflux port 4-1 First rinse port 4-2 Second rinse port 5-1 First-view camera 5-2 Second View 6 Thermometer test port 7 Rotary handhole 8 Vent 9 Drain flush port

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] See Figure 1-2 This utility model discloses a schematic diagram of an embodiment of a salt leg device, wherein the device includes a salt leg body 1, an inlet 11 located at the top of the salt leg body 1, an outlet 3-1 located in the lower middle part of the salt leg body 1, a return outlet 3-2, a first washing outlet 4-1 and a second washing outlet 4-2 located in the middle middle part of the salt leg body 1, a vent 8 located at the bottom of the salt leg body 1, and a venting and rinsing outlet 9 located on the bottom side wall. The outlet 3-1 is located above the return outlet 3-2, and the outlet 3-1 and the return outlet 3-2 are distributed on both sides of the salt leg body 1; the first washing outlet 4-1 is located above the outlet 3-1, the second washing outlet 4-2 is located below the return outlet 3-2, and the first washing outlet 4-1 and the second washing outlet 4-2 are distributed on both sides of the salt leg body 1; the venting and rinsing outlet 9 is located below the second washing outlet 4-2. The salt leg device is a salt enrichment device for a crystallizer, and the salt leg body 1 is detachably connected to the crystallizer via a flange 2. Furthermore, the crystallizer and salt leg device can be connected to the tank body, or disassembled into two parts for convenient transportation and maintenance.

[0031] Furthermore, the device also includes a thermometer test port 6, located in the corresponding area of ​​the salt leg body 1 between the discharge port 3-1 and the first washing port 4-1. By inserting a thermometer into the thermometer test port 6, the temperature of the material inside the salt leg body 1 can be detected in real time. The temperature changes based on the solid content within the salt leg body 1; when the salt content is high, the overall freezing point increases accordingly, allowing the salt leg to solidify at a lower temperature. The freezing point decreases due to salt concentration; it decreases at low concentrations but increases at high concentrations. Therefore, the thermometer port effectively reflects the solid content of the salt leg. Thus, an excessively high temperature inside the salt leg indicates a high solid content; conversely, an excessively low temperature indicates a low solid content. The thermometer provides indirect feedback on the solid content within the salt leg device, effectively preventing excessively high or low solid content and ensuring that the solid content remains within the operable range. The freezing point depression of salt is also related to its concentration; the freezing point decreases at low concentrations but rises at high concentrations. Therefore, the thermometer port can effectively reflect the solid content within the salt. Table 1 illustrates the saturation temperature range of five types of salt under normal pressure.

[0032] Table 1 - Saturation temperature values ​​of salts under normal pressure

[0033] Salt types Sodium sulfate Sodium chloride Potassium chloride potassium nitrate Sodium nitrate Saturation temperature at normal pressure (°C) 103.2 108 108.5 115 120

[0034] Furthermore, such as Figure 1As shown, the front end of the discharge port 3-1 is a downward-sloping bevel, used to guide the salt slurry downwards; the front end of the return port 3-2 is an upward-sloping bevel, used to guide the washing liquid upwards. The two flow directions are opposite, forming a counter-current flow field to suppress salt crystal deposition in the inner cavity of the salt leg body 1. Preferably, the opening direction of the discharge port 3-1 forms an angle of 30°-40° with the horizontal direction, and the opening direction of the return port 3-2 also forms an angle of 30°-40° with the horizontal direction. The axes of the downward-sloping bevel of the discharge port 3-1 and the upward-sloping bevel of the return port 3-2 intersect to form a counter-current angle of 60°-120°. More preferably, the counter-current angle is 90°. This effectively controls the flow direction of the salt, preventing the salt from dispersing to various angles within the salt leg, which is beneficial for secondary crystallization of the salt and also prevents the formation of dead zones within the salt leg.

[0035] Furthermore, the discharge port 3-1 and the return port 3-2 are connected in series via an external pipe, specifically, as shown in... Figure 2 As shown, the discharge port 3-1 and the reflux port 3-2 are connected in series with the discharge pump via external pipes. To effectively control the flow rates of discharge port 3-1 and reflux port 3-2, they are also connected to corresponding control valves and flow meters, respectively. Specifically, when the solid content is high, the flow rate of discharge port 3-1 is increased, and the flow rate of reflux port 3-2 is decreased; when the solid content is low, the discharge rate is reduced, and the reflux rate is increased to prolong the crystallization time.

[0036] Furthermore, the first washing port 4-1 and the second washing port 4-2 are connected in parallel via external pipes, and the first washing port 4-1 and the second washing port 4-2 are respectively connected to corresponding flow regulating devices. Specifically, as shown... Figure 2 As shown, both the first washing port 4-1 and the second washing port 4-2 are connected to the mother liquor tank. The mother liquor flows into the salt leg body 1 through the first washing port 4-1 and the second washing port 4-2 respectively via a mother liquor pump and corresponding pipes. The addition of mother liquor adjusts the solid content inside the salt leg body. When the solid content in the salt leg device is low, the second washing port 4-2 becomes the main washing water return port, and the return flow rate of the second washing port 4-2 needs to be increased. When the solid content in the salt leg device is high, the first washing port 4-1 becomes the main washing water return port, and the return flow rate of the first washing port 4-1 is reduced. This design prevents blockage inside the salt leg device or the inability to discharge salt from the rear end.

[0037] Preferably, the front end of the first washing port 4-1 is a downward-sloping bevel, with its opening direction at an angle of 30°-40° to the horizontal direction, and it enters the middle region tangentially along the salt leg body 1, with the tangential entry direction at an angle of 15-25° to the tangent of the inner wall of the cylinder; and the front end of the second washing port 4-2 is an upward-sloping bevel, with its opening direction at an angle of 30°-40° to the horizontal direction, and it enters the lower region tangentially along the salt leg body 1, with the tangential entry direction at an angle of 15-25° to the tangent of the inner wall of the cylinder; more preferably, the axes of the downward-sloping bevel of the first washing port 4-1 and the upward-sloping bevel of the second washing port 4-2 intersect to form a countercurrent angle of 60-120°, preferably 90°, and the washing liquid flow field of the two forms a countercurrent scouring zone in the middle to lower region of the salt leg, which is used to suppress salt crystal deposition and improve the accuracy of solid content control. Among them, the front port structure of the discharge port 3-1 is basically the same as that of the first washing port 4-1; the front port structure of the return port 3-2 is basically the same as that of the second washing port 4-2. Based on the fact that the discharge port 3-1 and the return port 3-2 are located on different sides of the salt leg body 1, the first washing port 4-1 and the second washing port 4-2 are also located on different sides of the salt leg body 1, except... Figure 1 In addition to the locations shown in the view, the discharge port 3-1 and the first washing port 4-1 can be set in different areas at the same level on the main body of the salt leg 1. Consequently, the return port 3-2 and the second washing port 4-2 will also change accordingly based on the adjustment of the discharge port 3-1 and the first washing port 4-1, so as to realize that the discharge port 3-1 and the return port 3-2, and the first washing port 4-1 and the second washing port 4-2 form an upper and lower counter-flowing layout to break the traditional unidirectional flow and eliminate dead zones.

[0038] Furthermore, such as Figure 2 As shown, part of the brine in the discharge pump is processed by a thickener to form a slurry, and then further processed by a centrifuge to obtain the finished salt. The mother liquor formed in the thickener and centrifuge is returned to the mother liquor tank, and then further pumped into the inner cavity of the salt leg body 1 through the first washing port 4-1 and the second washing port 4-2 respectively. The opposing water flow of the two forms a dynamic circulation, which prevents salt crystals from accumulating in local areas (such as dead zones), and at the same time promotes the secondary crystallization of small salt particles, thereby improving the purity of the salt.

[0039] Furthermore, the device also includes a rotary handhole 7 located at the bottom of the salt leg body 1, above the venting and flushing port 9. When the salt content accumulated at the bottom of the salt leg is high and the material cannot be discharged, the rotary handhole 7 can be opened to efficiently handle the problem of material accumulation in the salt leg. The combined design of the rotary handhole 7, the venting port 8, and the venting and flushing port 9 effectively solves the problem of material blockage during venting within the salt leg device. Additionally, during material discharge and venting of the salt leg device, the venting port 8 is opened to drain the material from the crystallizer. If discharge is obstructed, the venting and flushing port 9 can be opened to flush out any blockages in the venting port 8, resolving the problem of poor discharge.

[0040] Furthermore, the device also includes a first sight glass 5-1 and a second sight glass 5-2. The first sight glass 5-1 is located below the feed inlet 11; the second sight glass 5-2 is located in the corresponding area of ​​the salt leg body 1 between the discharge outlet 3-1 and the return outlet 3-2. The first sight glass 5-1 primarily observes the salt content and flow state of the salt fed through the top feed inlet; the second sight glass 5-2 primarily provides feedback on the adjustment of the solid content within the salt leg device by the discharge outlet 3-1, the return outlet 3-2, and the first and second washing outlets 4-1 and 4-2.

[0041] Furthermore, the salt leg body 1 consists of an upper cylindrical body and a lower stacked body. Preferably, the cylindrical body and the stacked body can be integrally connected or detachably connected. Figure 1 In the illustrated embodiment, the discharge port 3-1, the first washing port 4-1, the first sight glass 5-1, the second sight glass 5-2, and the thermometer test port 6 are all distributed at corresponding locations on the cylindrical body. The return port 3-2, the second washing port 4-2, the rotary handhole 7, the vent port 8, and the venting and rinsing port 9 are distributed at corresponding positions on the lower pile. Preferably, the length-to-diameter ratio of the cylindrical body is 2:1-4:1, the height of the lower pile is 1 / 3-1 / 2 of the height of the cylindrical body, and its cone angle is 50°-60°. The conical pile guide design improves the self-cleaning rate of the salt accumulation at the bottom.

[0042] In the above embodiments, those skilled in the art can use existing technology for software control. This utility model only protects the structure of the salt leg device and the interconnection relationship between them.

[0043] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A salt leg device, characterized in that, The device includes a salt leg body (1), an inlet (11) at the top of the salt leg body (1), an outlet (3-1) at the middle and lower part of the salt leg body (1), a return outlet (3-2), a first washing outlet (4-1), a second washing outlet (4-2), a vent (8) at the bottom of the salt leg body (1), and a venting and rinsing outlet (9) at the bottom side wall; The discharge port (3-1) is located above the return port (3-2), and the discharge port (3-1) and the return port (3-2) are distributed on both sides of the salt leg body (1). The front end of the discharge port (3-1) is a downward sloping opening, which is used to guide the salt slurry to be discharged downward. The front end of the return port (3-2) is an upward sloping opening, which is used to guide the washing liquid to flow back upward. The first washing port (4-1) is located above the discharge port (3-1), the second washing port (4-2) is located below the return port (3-2), and the first washing port (4-1) and the second washing port (4-2) are distributed on both sides of the salt leg body (1). The front end of the first washing port (4-1) is a downward sloping bevel, and the front end of the second washing port (4-2) is an upward sloping bevel. The venting and rinsing port (9) is located below the second rinsing port (4-2).

2. The salt leg device according to claim 1, characterized in that, The device also includes a thermometer test port (6), which is located in the corresponding area of ​​the salt leg body (1) between the discharge port (3-1) and the first washing port (4-1).

3. The salt leg device according to claim 1, characterized in that, The opening direction of the first washing port (4-1) forms an angle of 30°-40° with the horizontal direction, and the opening direction of the second washing port (4-2) forms an angle of 30°-40° with the horizontal direction. The axes of the downward-sloping bevel of the first washing port (4-1) and the upward-sloping bevel of the second washing port (4-2) intersect to form a counter-angle of 60°-120°.

4. The salt leg device according to claim 1, characterized in that, The discharge port (3-1) and the return port (3-2) are connected in series through an external pipe. The discharge port (3-1) and the return port (3-2) are also connected to the corresponding control valves and flow meters, respectively.

5. The salt leg device according to claim 1, characterized in that, The first washing port (4-1) and the second washing port (4-2) are connected in parallel through external pipes. The first washing port (4-1) and the second washing port (4-2) are also connected to the corresponding flow regulating devices.

6. The salt leg device according to claim 1, characterized in that, The opening direction of the discharge port (3-1) forms an angle of 30°-40° with the horizontal direction, the opening direction of the return port (3-2) forms an angle of 30°-40° with the horizontal direction, and the axes of the downward-sloping bevel of the discharge port (3-1) and the upward-sloping bevel of the return port (3-2) intersect to form an opposing angle of 60°-120°.

7. The salt leg device according to claim 1, characterized in that, The device also includes a first sight glass (5-1) and a second sight glass (5-2). The first sight glass (5-1) is located below the feed inlet (11); the second sight glass (5-2) is located in the corresponding area of ​​the salt leg body between the discharge outlet (3-1) and the return outlet (3-2).

8. The salt leg device according to any one of claims 1 to 7, characterized in that, The device also includes a rotary hand hole (7) located at the bottom of the salt leg body (1), the rotary hand hole (7) being located above the venting and rinsing port (9).

9. The salt leg device according to claim 8, characterized in that, The main body (1) of the salt leg consists of an upper cylindrical body and a lower stack body.

10. The salt leg device according to claim 9, characterized in that, The length-to-diameter ratio of the cylindrical body is 2:1-4:1, the height of the lower stack is 1 / 3-1 / 2 of the height of the cylindrical body, and its cone angle is 50°-60°.

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