Salt leg device and evaporating crystallizer with same

Abstract

The utility model provides a salt leg device and an evaporating crystallizer with the same, and belongs to the technical field of chemical engineering and environmental protection, the salt leg device comprises a salt leg main body, an elutriation pipeline and a discharge pipeline, an elutriation cavity is arranged in the salt leg main body, and a feed port is arranged at the top of the salt leg main body; the elutriation pipeline is communicated with the salt leg main body and comprises a first branch, a second branch and a third branch which are sequentially arranged along the salt leg main body from top to bottom; the discharging pipeline is arranged at the bottom of the salt leg main body. When the salt leg is used, evaporation mother liquor enters the elutriation cavity through the feeding port, elutriation water enters the salt leg body from the upper portion, the middle portion and the lower portion of the salt leg body through the first branch, the second branch and the third branch, salt discharging slurry generated after elutriation flows out through the discharging pipeline, elutriation is carried out at different positions of the salt leg body, and therefore the better elutriation effect is achieved. The quality of the product salt is improved; according to the salt leg device provided by the utility model, the problem that the salt quality of a product elutriated by a salt leg in the prior art is not high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry and environmental protection, and in particular to a salt leg device and an evaporation crystallizer having the same. Background Art

[0002] Industrial high-salt wastewater often contains a large amount of inorganic salt ions and organic matter, resulting in a high COD. Especially in the evaporation and crystallization stage, due to the continuous concentration of the wastewater, the COD becomes increasingly enriched, resulting in the mother liquor of sodium chloride and sodium sulfate products produced by evaporation and crystallization carrying too high COD. The quality of saltpeter is greatly affected, the product turns seriously yellow, and the color cannot meet the relevant product standards.

[0003] The evaporator crystallizer is usually equipped with salt legs, which play the role of collecting salt, grading, washing, re-dissolving soluble impurities, cooling, and transportation. It is one of the key components to improve the quality of salt and reduce the energy consumption of the evaporator system.

[0004] However, the washing water of the existing salt legs usually enters from the middle and upper parts of the salt legs, resulting in poor washing effect at the bottom of the salt legs, high COD entrained in the mother liquor, and problems such as uneven particle size and low quality of the product salt. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem of low quality of product salt after salt leg washing in the prior art, thereby providing a salt leg device and an evaporation crystallizer having the same.

[0006] In order to solve the above technical problems, the utility model provides a salt leg device, comprising:

[0007] A salt leg body, wherein a washing cavity is provided inside the salt leg body, and a feed port is provided on the top of the salt leg body;

[0008] An elutriation pipeline is connected to the salt leg body, the elutriation pipeline is provided with a first branch, a second branch and a third branch, and the first branch, the second branch and the third branch are sequentially arranged along the salt leg body from top to bottom;

[0009] A discharge pipeline is arranged at the bottom of the salt leg body.

[0010] Optionally, the second branch has the largest diameter, the first branch has the second largest diameter, and the third branch has the smallest diameter.

[0011] Optionally, an electric regulating valve is provided on the second branch line, and the electric regulating valve is linked to the opening and closing of the valve on the discharge pipeline.

[0012] Optionally, the first branch and the second branch are arranged horizontally along the tangent direction of the salt leg body, and the washing water entering the first branch and the second branch rotate in opposite directions.

[0013] Optionally, the third branch is arranged to be inclined downward at an angle to the horizontal direction.

[0014] Optionally, two observation windows are provided on the salt leg body, and the two observation windows are respectively arranged at the horizontal planes where the first branch and the second branch are located.

[0015] Optionally, the observation window is configured as a flushable neckless viewing mirror.

[0016] Optionally, a salt accumulation space is reserved between the discharge pipeline and the bottom end of the salt leg body, and the discharge pipeline is arranged to be inclined downward.

[0017] Optionally, a cleaning port is also provided at the bottom end of the salt leg body.

[0018] The utility model provides an evaporation crystallizer, comprising the salt leg device described in any one of the above schemes.

[0019] The technical solution of the utility model has the following advantages:

[0020] 1. In the salt leg device provided by the utility model, the evaporated mother liquor enters the washing chamber from the top of the salt leg body through the feed port, and the washing water enters the washing chamber from the upper, middle and lower parts of the salt leg body through the first branch, the second branch and the third branch on the washing pipeline. By washing at different positions, a better washing effect is achieved and the quality of the product salt is improved. The discharged salt slurry produced after washing flows out through the discharge pipeline. The salt leg device provided by the utility model solves the problem of low quality of the product salt after the salt leg is washed in the prior art.

[0021] 2. The salt leg device provided by the utility model, under the condition of ensuring the flow rate of the washing water entering the washing chamber, the second branch with the largest pipe diameter inputs the largest washing water flow rate, and washes the middle part of the salt leg body below the first branch; the first branch with the second largest pipe diameter inputs a smaller washing water flow rate, and washes the upper part of the salt leg body, and can make a small amount of washing water overflow upward, so as to flush the small particle crystals in the salt leg body into the evaporator for continued growth, thereby improving the particle size of the product, and also preventing the first branch from having too much flow and flushing large particle crystals into the evaporator; the third branch with the smallest pipe diameter washes the lower part of the salt leg body, so as to prevent the third branch from having too much flow and flushing large particle crystals into the discharge pipeline and causing blockage.

[0022] 3. In the salt leg device provided by the utility model, when the valve on the discharge pipeline is opened to discharge, the electric regulating valve on the second branch is opened and washing water begins to be input; when the valve on the discharge pipeline is closed to stop discharging, the electric regulating valve on the second branch is closed and the washing water input is stopped, so as to prevent a large amount of washing water from flowing upward and flushing large-particle crystals back into the evaporator.

[0023] 4. In the salt leg device provided by the utility model, the washing water of the first branch and the second branch enters the washing chamber along the tangent direction of the salt leg body, so that the washing water rotates and flows in the washing chamber. The washing water flowing through the first branch and the second branch rotates in opposite directions, which can increase the turbulence of the washing water and reduce the flow rate at the same time, thereby improving the washing effect.

[0024] 5. The salt leg device provided by the utility model has a third branch that is tilted downward, so that the washing water can enter along the axial direction of the salt leg body. The washing water first flows downward to the bottom of the salt leg body and then flows upward, thereby improving the washing effect.

[0025] 6. The salt leg device provided by the utility model can observe the crystal aggregation degree and the washing effect at the horizontal plane where the first branch and the second branch are located through the observation window.

[0026] 7. The salt leg device provided by the utility model adopts a flushing neckless sight glass, which can be flushed regularly to ensure that the sight glass is clean, so that the field of view of the observation window is clear, and it is convenient to observe the washing effect and the crystal buffer amount in the salt leg.

[0027] 8. The salt leg device provided by the utility model has a salt accumulation space reserved between the discharge pipeline and the bottom of the salt leg body, which allows large pieces of salt to be deposited in the salt accumulation space to avoid clogging the discharge pipeline; the downwardly inclined discharge pipeline can facilitate the flow of salt slurry.

[0028] 9. The salt leg device provided by the utility model has a cleaning port arranged at the bottom of the salt leg body, which is used to clean the deposited salt in the salt accumulation space after shutdown.

[0029] 10. The evaporation crystallizer provided by the utility model has any of the above advantages because it adopts the above salt leg device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of an implementation of a salt leg device provided in an example of the present utility model.

[0032] Description of reference numerals:

[0033] 1. Salt leg body; 2. Washing pipeline; 3. First branch; 4. Second branch; 5. Third branch; 6. Discharge pipeline; 7. Observation window; 8. Cleaning port. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] This embodiment provides a structure of a salt leg device capable of improving the quality of product salt, which is used for washing the evaporated mother liquor.

[0039] like Figure 1As shown, a specific implementation of a salt leg device provided in this embodiment includes: a salt leg body 1, a washing pipeline 2 and a discharge pipeline 6, the salt leg body 1 has a washing chamber inside, and a feed port is arranged at the top of the salt leg body 1; the washing pipeline 2 is connected to the salt leg body 1, and the washing pipeline 2 is provided with a first branch 3, a second branch 4 and a third branch 5, and the first branch 3, the second branch 4 and the third branch 5 are arranged in sequence along the salt leg body 1 from top to bottom; the discharge pipeline 6 is arranged at the bottom of the salt leg body 1.

[0040] When in use, the evaporated mother liquor enters the washing chamber from the top of the salt leg body 1 through the feed port, and the washing water enters the washing chamber from the upper, middle and lower parts of the salt leg body 1 through the first branch 3, the second branch 4 and the third branch 5 on the washing pipeline 2. The discharged salt slurry produced after washing flows out through the discharge pipeline 6. By washing at different positions of the salt leg body 1, a better washing effect is achieved and the quality of the product salt is improved. The salt leg device provided in this embodiment solves the problem of low quality of the product salt after washing the salt leg in the prior art.

[0041] It should be noted that the total flow rate of the washing water in the washing pipeline 2 is about 1.3-1.4 of the salt slurry discharge volume, which can replace the high COD mother liquor on the surface of the crystal, reduce the COD content in the mother liquor entrained by the crystal, and ensure the purity and whiteness of the product salt. The washing pipeline 2 is used to connect the centrifugal mother liquor pipe; the discharge pipeline 6 is used to connect the discharge pump.

[0042] like Figure 1 As shown, in the salt leg device provided by this embodiment, the diameter of the second branch 4 is the largest, the diameter of the first branch 3 is the second largest, and the diameter of the third branch 5 is the smallest. Under the condition of ensuring the flow rate of the elution water entering the elution chamber, the second branch 4 with the largest diameter inputs the largest flow of elution water, and elutes the middle part of the salt leg body 1 below the first branch 3, and the first branch 3 with the second largest diameter inputs a smaller flow of elution water, and elutes the upper part of the salt leg body 1, and a small amount of elution water can overflow upward, so that the small particle crystals in the salt leg body 1 can be flushed into the evaporator for continued growth, and the particle size of the product can be increased, and the first branch 3 can be prevented from being flushed into the evaporator due to excessive flow; the third branch 5 with the smallest diameter washes the lower part of the salt leg body 1, and can prevent the third branch 5 from being flushed into the discharge pipeline 6 due to excessive flow, causing blockage. In addition, as an alternative implementation, the first branch 3, the second branch 4 and the third branch 5 can also be set to the same pipe diameter, and the washing water flow of the first branch 3, the second branch 4 and the third branch 5 can be adjusted by setting valves.

[0043] like Figure 1As shown, in the salt leg device provided in this embodiment, an electric regulating valve is provided on the second branch 4, and the electric regulating valve is linked to the opening and closing of the valve on the discharge pipeline 6. When the valve on the discharge pipeline 6 is opened for discharge, the electric regulating valve on the second branch 4 is opened and the washing water starts to be input; when the valve on the discharge pipeline 6 is closed to stop the discharge, the electric regulating valve on the second branch 4 is closed and the washing water is stopped from being input, so as to avoid a large amount of washing water flowing upward and flushing the large particle crystals back into the evaporator. In addition, as an alternative embodiment, the electric regulating valve can also be replaced by a manual regulating valve, which is manually controlled and adjusted according to the discharge situation.

[0044] like Figure 1 As shown, in the salt leg device provided by this embodiment, the first branch 3 and the second branch 4 are horizontally arranged along the tangent direction of the salt leg body 1, and the washing water entering the first branch 3 and the second branch 4 rotates in opposite directions. The washing water of the first branch 3 and the second branch 4 enters the washing chamber along the tangent direction of the salt leg body 1, so that the washing water rotates and flows in the washing chamber. The washing water flowing in the first branch 3 and the second branch 4 rotates in opposite directions, which can increase the turbulence of the washing water and reduce the flow rate at the same time, thereby improving the washing effect. Specifically, the first branch 3 is arranged on the first side of the salt leg body 1, and the second branch 4 is arranged on the second side of the salt leg body 1. The first branch 3 and the second branch 4 are arranged in parallel, and the entry direction of the washing water is the same, so that the washing water rotates in opposite directions in the washing chamber. In addition, as an alternative embodiment, the first branch 3 and the second branch 4 can also be arranged on the same side of the salt leg body 1, and the first branch 3 and the second branch 4 have opposite directions of entry of washing water; or the first branch 3 and the second branch 4 are arranged vertically or at an angle, and can make the rotation direction of the washing water opposite and the manner.

[0045] like Figure 1 As shown, in the salt leg device provided in this embodiment, the third branch 5 is arranged to be tilted downward at an angle to the horizontal direction, so that the washing water can enter along the axial direction of the salt leg body 1, and the washing water first flows downward to the bottom of the salt leg body 1, and then flows upward, thereby improving the washing effect. Specifically, the bottom of the salt leg body 1 is arranged to be a conical structure.

[0046] like Figure 1 As shown, in the salt leg device provided in this embodiment, two observation windows 7 are provided on the salt leg body 1, and the two observation windows 7 are respectively provided at the horizontal planes where the first branch 3 and the second branch 4 are located. Through the observation windows 7, the crystal aggregation degree and the panning effect at the horizontal planes where the first branch 3 and the second branch 4 are located can be observed.

[0047] like Figure 1As shown, in the salt leg device provided in this embodiment, the observation window 7 is provided with a flushing neckless mirror. The flushing neckless mirror can be regularly flushed to ensure that the mirror is clean and clean, so that the field of view of the observation window 7 is clear, and it is convenient to observe the washing effect and the crystal buffer amount in the salt leg. In addition, as an alternative embodiment, the observation window 7 can also be provided with a neckless mirror with a brush or a scraper.

[0048] like Figure 1 As shown, in the salt leg device provided in this embodiment, a salt accumulation space is reserved between the discharge pipeline 6 and the bottom end of the salt leg body 1, and the discharge pipeline 6 is arranged to be inclined downward. The salt accumulation space reserved between the discharge pipeline 6 and the bottom end of the salt leg body 1 can allow large pieces of salt to be deposited in the salt accumulation space to avoid blocking the discharge pipeline 6; the downwardly inclined discharge pipeline 6 can facilitate the flow of the salt discharge slurry.

[0049] like Figure 1 As shown, in the salt leg device provided in this embodiment, a cleaning port 8 is further provided at the bottom of the salt leg body 1. The cleaning port 8 is provided at the bottom of the salt leg body 1 and is used to clean the deposited salt in the salt accumulation space after shutdown.

[0050] How to use

[0051] like Figure 1 As shown, the salt leg device provided in this embodiment, when in use, the evaporated mother liquor flows in from the top feed port of the salt leg main body 1, and the washing water is input into the salt leg main body 1 through the first branch 3, the second branch 4 and the third branch 5, and the salt slurry produced after washing flows out through the discharge pipeline 6, and different positions of the salt leg main body 1 are washed through three branches with different pipe diameters to achieve a better washing effect.

[0052] In addition, this embodiment also provides an evaporation crystallizer, which adopts the salt leg device described in the above embodiment to achieve more uniform particle size of the salt product produced by evaporation and crystallization of the evaporator, lower COD entrained in the mother liquor, and higher quality of the product salt.

[0053] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A salt leg device, characterized in that: include: A salt leg body (1), wherein the salt leg body (1) has a washing cavity inside, and a feed port is arranged at the top of the salt leg body (1); an elutriation pipeline (2) connected to the salt leg body (1), wherein the elutriation pipeline (2) is provided with a first branch (3), a second branch (4) and a third branch (5), wherein the first branch (3), the second branch (4) and the third branch (5) are arranged in sequence from top to bottom along the salt leg body (1); A discharge pipeline (6) is arranged at the bottom of the salt leg body (1).

2. The salt leg device according to claim 1, characterized in that: The second branch (4) has the largest diameter, the first branch (3) has the second largest diameter, and the third branch (5) has the smallest diameter.

3. The salt leg device according to claim 1, characterized in that: The second branch (4) is provided with an electric regulating valve, and the electric regulating valve is linked to the opening and closing of the valve on the discharge pipeline (6).

4. The salt leg device according to claim 1, characterized in that: The first branch (3) and the second branch (4) are arranged horizontally along the tangent direction of the salt leg body (1), and the washing water entering the first branch (3) and the second branch (4) rotate in opposite directions.

5. The salt leg device according to claim 2, characterized in that: The third branch (5) is arranged to be inclined downward at an angle to the horizontal direction.

6. The salt leg device according to claim 1, characterized in that: The salt leg body (1) is provided with two observation windows (7), and the two observation windows (7) are respectively arranged at the horizontal planes where the first branch (3) and the second branch (4) are located.

7. The salt leg device according to claim 6, characterized in that: The observation window (7) is configured as a flushing neckless viewing mirror.

8. The salt leg device according to any one of claims 1 to 7, characterized in that: A salt accumulation space is reserved between the discharge pipeline (6) and the bottom end of the salt leg body (1), and the discharge pipeline (6) is arranged to be inclined downward.

9. The salt leg device according to claim 8, characterized in that: The bottom end of the salt leg body (1) is also provided with a cleaning port (8).

10. An evaporation crystallizer, characterized in that: A salt leg device comprising the salt leg device according to any one of claims 1 to 9.

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