Environment-friendly separator for sodium sulfate evaporation crystallization

Abstract

The utility model relates to sodium sulfate processing technical field, concretely is a kind of sodium sulfate evaporation crystallization environmental protection type separator, including main separator, the inside of main separator is equipped with shunt component, shunt component includes the multiple shunt pipes of being set in the inside of main separator, the upper and lower ends of multiple shunt pipes are fixedly installed with baffle, the inner wall of multiple shunt pipes is equipped with the guide component for prompting liquid to form cyclone in shunt pipe inside, and the adjusting component for controlling multiple guide components is arranged on main separator in shunt pipe inside deformation and cleaning its inner wall;By setting guide component and adjusting component, reached the effect that can let sodium sulfate solution form cyclone in shunt pipe, cyclone motion increases the contact area of sodium sulfate solution and pipe wall, while centrifugal force promotes crystallization particle to gather and settle to pipe wall, improves crystallization purity, and can control the effect that helical elastic piece realizes automatic cleaning dirt, maintains heat transfer efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sodium sulfate processing technology, and in particular to an environmentally friendly separator for sodium sulfate evaporation and crystallization. Background Technology

[0002] Sodium sulfate evaporation crystallizer is an environmentally friendly separator used to evaporate and crystallize sodium sulfate solution and achieve solid-liquid separation. The most common type of equipment is the MVR evaporation crystallizer.

[0003] A partial pressure evaporation device and method for MVR evaporation disclosed in Chinese Patent Publication No. CN104399266A involves the secondary steam generated during evaporation being compressed by a compressor to increase its temperature and pressure before being recycled as a heat source. This allows for the continuous evaporation and concentration of wastewater, yielding sodium sulfate crystals. This method offers advantages such as high efficiency, energy saving, and environmental protection with emission reduction benefits. However, based on existing evaporation crystallization separators and related technologies, the following drawbacks exist:

[0004] Firstly, traditional MVR evaporator crystallizers often use straight tubes or simple liquid distribution structures. When the liquid flows in the tube bundle, it is easy for the flow to be biased or insufficient turbulence. This results in a limited contact area between the liquid and the tube wall, low heat transfer efficiency, slow water evaporation rate, prolonged concentration cycle, and the inability of crystal particles to effectively aggregate to the tube wall. They tend to be suspended in the liquid, leading to a decrease in crystal purity and even crystal agglomeration. At the same time, excessively high local concentrations cause uneven crystallization, resulting in a dispersed product particle size distribution, which affects subsequent separation and product quality.

[0005] Secondly, traditional equipment relies on gravity for natural sedimentation, which is slow and incomplete. This is especially true for small-sized crystals or high-viscosity materials, which can lead to insufficient solid-liquid separation, resulting in high solid content in the concentrate and increased difficulty in subsequent processing. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide an environmentally friendly separator for sodium sulfate evaporation and crystallization.

[0007] The objective of this utility model is achieved through the following technical solution: an environmentally friendly sodium sulfate evaporation crystallization separator, comprising a main separator, a secondary separator, and a compressed air unit. The main separator is internally equipped with a flow-dividing assembly, which includes multiple flow-dividing pipes disposed inside the main separator. Partitions are fixedly installed at both the upper and lower ends of the multiple flow-dividing pipes in the main separator. The multiple flow-dividing pipes are fixedly installed between two partitions, forming a jacketed area. The inner walls of the multiple flow-dividing pipes are provided with guiding components to promote the formation of a swirling flow of liquid within the pipes. The main separator is equipped with adjusting components for controlling the deformation of the multiple guiding components within the flow-dividing pipes and cleaning their inner walls.

[0008] Preferably, the guiding assembly includes a plurality of helical elastic elements disposed on the inner wall of the diversion tube, the top ends of the plurality of helical elastic elements are fixedly provided with sleeves, and the bottom ends of the plurality of helical elastic elements are all connected to the partition located below through a fixing assembly.

[0009] Preferably, the adjusting assembly includes movable plates for controlling the circumferential rotation and axial sliding of the plurality of sleeves, a hydraulic cylinder is fixedly installed on the top of the main separator, the output end of the hydraulic cylinder is disposed through the interior of the main separator, and a lead screw is fixedly installed on the output end of the hydraulic cylinder, the lead screw being threadedly connected to the movable plate.

[0010] Preferably, the cross-sectional shape of the sleeve is T-shaped, and the movable plate has a corresponding receiving groove at the position of each of the multiple sleeves. The opening at the top of the sleeve is chamfered.

[0011] Preferably, the fixing component includes a fixing block fixedly disposed at the bottom end of the helical elastic element, and screws are inserted into the fixing block. The bottom of the partition located below is provided with a locking groove corresponding to the position of the fixing block, and the locking groove is provided with a threaded hole adapted to the screw.

[0012] Preferably, the top of the main separator is fixedly provided with an inlet pipe, and the bottom of the main separator is fixedly provided with an outlet pipe.

[0013] Preferably, the main separator has a branch pipe fixedly installed on its outer surface near the bottom, which is connected to the secondary separator. The heat mixer flowing out of the branch pipe enters the secondary separator through the branch pipe, where it is cooled and further separated. The compressed air unit is used to draw out the steam inside the secondary separator and increase its pressure and temperature. The main separator has a tee fixedly installed on its outer surface near the top to receive the steam compressed by the compressed air unit and fresh steam.

[0014] Beneficial effects:

[0015] This environmentally friendly sodium sulfate evaporation crystallization separator, through the setting of guiding and regulating components, achieves the effect of creating a swirling flow of sodium sulfate solution within the distribution tube. The swirling motion increases the contact area between the sodium sulfate solution and the tube wall, improving concentration efficiency. At the same time, centrifugal force causes crystallized particles to aggregate and settle towards the tube wall, reducing crystal suspension in the liquid and improving crystal purity. Furthermore, when necessary, the spiral elastic element can be controlled to achieve automatic cleaning of dirt, ensuring that all parts of the tube wall are cleaned and maintaining heat transfer efficiency. Attached Figure Description

[0016] 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 these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0018] Figure 2 This is a schematic diagram of the external structure of the main separator of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the main separator of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the current splitter component of this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the partition located at the bottom of this utility model;

[0022] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A;

[0023] Figure 7 This is a cross-sectional view of the partition and diversion pipe of this utility model;

[0024] Figure 8 This utility model Figure 7 Enlarged schematic diagram of the structure at point B.

[0025] In the diagram: 1. Main separator; 101. Feed pipe; 102. Discharge pipe; 103. Branch pipe; 104. Tee; 2. Secondary separator; 3. Compressor unit; 4. Diverter assembly; 401. Diverter pipe; 402. Baffle plate; 4021. Engaging groove; 5. Jacket area; 6. Guide assembly; 601. Spiral elastic element; 602. Sleeve; 7. Adjustment assembly; 701. Movable plate; 7011. Receiving groove; 702. Hydraulic cylinder; 703. Lead screw; 8. Fixing assembly; 801. Fixing block; 802. Screw. Detailed Implementation

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0028] like Figures 1 to 8 As shown, an environmentally friendly sodium sulfate evaporation crystallization separator includes a main separator 1, a secondary separator 2, and a compressed air unit 3. The main separator 1 has a flow-dividing assembly 4 inside, which includes multiple flow-dividing pipes 401 disposed inside the main separator 1. Baffles 402 are fixedly installed at both the upper and lower ends of the multiple flow-dividing pipes 401 in the main separator 1. The multiple flow-dividing pipes 401 are fixedly installed between two baffles 402, and the two baffles 402 assemblies form a jacket area 5. The inner wall of the multiple flow-dividing pipes 401 is provided with guiding components 6 to promote the formation of swirling flow of liquid inside the flow-dividing pipes 401. The main separator 1 is provided with adjusting components 7 to control the deformation of the multiple guiding components 6 inside the flow-dividing pipes 401 and to clean their inner walls.

[0029] like Figure 3 , Figure 7 and Figure 8As shown, the guiding component 6 includes multiple spiral elastic elements 601 disposed on the inner wall of the distribution pipe 401. The top ends of the multiple spiral elastic elements 601 are fixedly provided with sleeves 602, and the bottom ends of the multiple spiral elastic elements 601 are all connected to the partition plate 402 located below through the fixing component 8. When the sodium sulfate solution enters the interior of the distribution pipe 401, the spiral elastic elements 601 cause the sodium sulfate solution to form a swirling flow. The swirling flow increases the contact area between the sodium sulfate solution and the pipe wall, promotes heat transfer, accelerates water evaporation, and improves concentration efficiency. At the same time, the centrifugal force causes the crystal particles to aggregate and settle towards the pipe wall, reducing the suspension of crystals in the liquid and improving the crystal purity. Therefore, the liquid flow is more uniform in the swirling flow state, which can avoid the problem of uneven crystallization caused by excessively high local concentration and accelerate the separation of solid particles and liquid.

[0030] like Figures 3 to 8 As shown, the adjusting assembly 7 includes a movable plate 701 for controlling the circumferential rotation and axial sliding of multiple sleeves 602. A hydraulic cylinder 702 is fixedly installed on the top of the main separator 1. The output end of the hydraulic cylinder 702 passes through the interior of the main separator 1, and a lead screw 703 is fixedly installed on the output end of the hydraulic cylinder 702. The lead screw 703 is threadedly connected to the movable plate 701. The cross-sectional shape of the sleeve 602 is T-shaped. The movable plate 701 has a receiving groove 7011 corresponding to the position of multiple sleeves 602. The opening at the top of the sleeve 602 is chamfered. The fixing assembly 8 includes a fixing block 801 fixedly installed at the bottom of the spiral elastic element 601. Screws 802 are inserted into the fixing block 801. The bottom of the partition 402 located below has a locking groove 4021 corresponding to the position of the fixing block 801. The locking groove 4021 has a threaded hole that matches the screw 802. When needed... When cleaning the inner wall of the diversion pipe 401, the hydraulic cylinder 702 controls the movable plate 701 to rise. Then, utilizing the spiral characteristics of the spiral elastic element 601, the sleeve 602 can rotate circumferentially while sliding axially with the movable plate 701. This causes the spiral elastic element 601 to deform (the spiral degree decreases). When the spiral elastic element 601 deforms, its edge contacts the inner wall of the diversion pipe 401 (axial sliding can cover the entire length of the diversion pipe 401, ensuring that all parts of the pipe wall are cleaned and maintaining heat transfer efficiency), scraping off the attached crystals or impurities, preventing the diversion pipe 401 from becoming blocked. At the same time, the circumferential rotation makes the cleaning range more uniform and prevents local scale buildup. During the deformation process of the spiral elastic element 601, its own structure expands and contracts, shaking off or bouncing away the fine particles attached to its surface, preventing crystal entanglement and accumulation. The deformation recovery force of the elastic material can prevent fibrous or sticky impurities from entanglement, maintaining the durability of the swirling effect.

[0031] like Figures 3 to 8As shown, the fixed component 8 and the lead screw 703 are threadedly connected to the movable plate 701. When it is necessary to disassemble the guide component 6, the bolts of the hydraulic cylinder 702 can be removed, and then the hydraulic cylinder 702 can be rotated to separate the lead screw 703 from the movable plate 701. At this time, the screw 802 can be removed to pull the guide component 6 out of the diversion pipe 401. During installation, the new guide component 6 is inserted into the diversion pipe 401, and then the screw 802 is threadedly connected to the threaded hole in the engaging groove 4021 that is compatible with the screw 802. Then, the hydraulic cylinder 702 can be rotated to thread the lead screw 703 to the movable plate 701, and then the hydraulic cylinder 702 can be fixed with bolts to complete the replacement of the guide component 6.

[0032] like Figure 1 and Figure 2 As shown, the main separator 1 is fixedly provided with an inlet pipe 101 at the top and an outlet pipe 102 at the bottom. The main separator 1 is fixedly provided with a branch pipe 103 connected to the secondary separator 2 near the bottom of the outer surface. The hot mixer flowing out of the diversion pipe 401 will enter the secondary separator 2 through the branch pipe 103, and then be cooled and further separated inside the secondary separator 2. The compressed air unit 3 is used to draw out the steam inside the secondary separator 2 and increase its pressure and temperature. The main separator 1 is fixedly provided with a three-way fitting 104 for receiving the steam compressed by the compressed air unit 3 and fresh steam near the top of the outer surface.

[0033] The work process is as follows:

[0034] S1: As Figure 3 As shown, during use, fresh steam enters the jacket area 5 through the tee 104, thereby allowing the steam to be evenly distributed on the outer surface of the multiple branch pipes 401.

[0035] S2: As Figure 3 , Figure 7 and Figure 8 As shown, sodium sulfate solution is injected into the main separator 1 through feed pipe 101, and then the sodium sulfate solution is diverted into multiple diversion pipes 401 through multiple sleeves 602.

[0036] S3: As Figure 3 , Figure 7 and Figure 8 As shown, when the sodium sulfate solution enters the inside of the distributor 401, the spiral elastic element 601 causes the sodium sulfate solution to form a swirling flow. The swirling flow increases the contact area between the sodium sulfate solution and the pipe wall, promotes heat transfer, accelerates water evaporation, and improves concentration efficiency. At the same time, the centrifugal force causes the crystal particles to aggregate and settle towards the pipe wall, reducing the suspension of crystals in the liquid and improving crystal purity. Therefore, the liquid flow is more uniform in the swirling state, which can avoid the problem of uneven crystallization caused by excessively high local concentration and accelerate the separation of solid particles from liquid.

[0037] S4: As Figure 3 , Figure 7 and Figure 8 As shown, as hot steam condenses on the surface of the manifold 401, the latent heat released by the evaporated steam increases the temperature of the liquid in the manifold 401.

[0038] S5: As Figure 3 , Figure 7 and Figure 8 As shown, when the solution leaves the bottom of the split tube 401, most of the water is evaporated to obtain a high-viscosity concentrate. The evaporated water turns into steam when it leaves the split tube 401, while the concentrate falls to the bottom of the main separator 1.

[0039] S6: As Figure 1 As shown, the hot mixed gas enters the secondary separator 2 through the branch pipe 103, where it is cooled and further separated, while the steam rises.

[0040] S7: As Figure 1 As shown, the rising steam still contains most of the heat energy when it enters the system. The compressor unit 3 draws this steam from the secondary separator 2 and compresses it again to increase the pressure and temperature of the steam, so that the secondary steam can be reused like fresh steam. Then, the secondary steam is discharged into the main separator 1 through the three-way fitting 104.

[0041] S8: As Figures 3 to 8 As shown, when it is necessary to clean the inner wall of the diversion pipe 401, the hydraulic cylinder 702 controls the movable plate 701 to rise. Then, by utilizing the spiral characteristics of the spiral elastic element 601, the sleeve 602 can rotate circumferentially while sliding axially with the movable plate 701, thereby deforming the spiral elastic element 601 (reducing the spiral degree). When the spiral elastic element 601 deforms, its edge contacts the inner wall of the diversion pipe 401 (axial sliding can cover the entire length of the diversion pipe 401, ensuring that all parts of the pipe wall are cleaned and maintaining heat transfer efficiency), scraping off the attached crystals or impurities, avoiding blockage of the diversion pipe 401. At the same time, the circumferential rotation makes the cleaning range more uniform and prevents local scale buildup.

[0042] S9: such as Figures 3 to 8 As shown, during the deformation of the spiral elastic element 601, its own structure expands and contracts, shaking off or bouncing away the fine particles attached to its surface, avoiding crystal entanglement and accumulation. The deformation recovery force of the elastic material can prevent fibrous or sticky impurities from entanglement and maintain the durability of the swirling effect.

[0043] The main separator 1, auxiliary separator 2, compressed air unit 3 and hydraulic cylinder 702 described in this application are all known technologies, therefore their specific structures and working principles are not described in detail.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An environmentally friendly sodium sulfate evaporation and crystallization separator, characterized in that: The system includes a main separator (1), a secondary separator (2), and a compressed air unit (3). The main separator (1) is equipped with a flow splitting assembly (4). The flow splitting assembly (4) includes multiple flow splitting pipes (401) disposed inside the main separator (1). The main separator (1) is fixedly equipped with baffles (402) at both the upper and lower ends of the multiple flow splitting pipes (401). The multiple flow splitting pipes (401) are fixedly installed between two baffles (402). The two baffles (402) assemblies form a jacketed area (5). The inner walls of the multiple diversion tubes (401) are provided with guide components (6) for causing the liquid to form a swirling flow inside the diversion tubes (401), and the main separator (1) is provided with adjustment components (7) for controlling the deformation of the multiple guide components (6) inside the diversion tubes (401) and cleaning their inner walls.

2. The environmentally friendly sodium sulfate evaporation crystallization separator according to claim 1, characterized in that: The guiding component (6) includes a plurality of spiral elastic elements (601) disposed on the inner wall of the diversion pipe (401). The top ends of the plurality of spiral elastic elements (601) are fixedly provided with sleeves (602), and the bottom ends of the plurality of spiral elastic elements (601) are connected to the partition (402) located below through a fixing component (8).

3. The environmentally friendly sodium sulfate evaporation crystallization separator according to claim 2, characterized in that: The adjustment assembly (7) includes a movable plate (701) for controlling the circumferential rotation and axial sliding of the multiple sleeves (602). A hydraulic cylinder (702) is fixedly installed on the top of the main separator (1). The output end of the hydraulic cylinder (702) is disposed inside the main separator (1). A lead screw (703) is fixedly installed on the output end of the hydraulic cylinder (702). The lead screw (703) is threadedly connected to the movable plate (701).

4. The environmentally friendly sodium sulfate evaporation crystallization separator according to claim 3, characterized in that: The sleeve (602) has a T-shaped cross-section. The movable plate (701) has a matching receiving groove (7011) at the position of each sleeve (602). The opening at the top of the sleeve (602) is chamfered.

5. The environmentally friendly sodium sulfate evaporation crystallization separator according to claim 2, characterized in that: The fixing component (8) includes a fixing block (801) fixedly disposed at the bottom end of the spiral elastic element (601). Each fixing block (801) is fitted with a screw (802). The bottom of the partition plate (402) located below is provided with a locking groove (4021) corresponding to the position of the fixing block (801). The locking groove (4021) is provided with a threaded hole that matches the screw (802).

6. The environmentally friendly sodium sulfate evaporation crystallization separator according to claim 1, characterized in that: The main separator (1) is fixedly provided with an inlet pipe (101) at the top and an outlet pipe (102) at the bottom.

7. The environmentally friendly sodium sulfate evaporation crystallization separator according to claim 6, characterized in that: The main separator (1) has a branch pipe (103) fixedly installed on its outer surface near the bottom, which is connected to the secondary separator (2). The heat mixer flowing out of the split pipe (401) will enter the secondary separator (2) through the branch pipe (103) and then be cooled and further separated inside the secondary separator (2). The compressor fan unit (3) is used to draw out the steam inside the secondary separator (2) and increase its pressure and temperature. The main separator (1) has a tee (104) fixedly installed on its outer surface near the top, which receives the steam compressed by the compressor fan unit (3) and fresh steam.

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