Efficient energy-saving evaporation crystallization device

Abstract

The utility model belongs to evaporation crystallization device technical field, and disclose a kind of efficient energy-saving evaporation crystallization device, including crystallization cylinder body, still including the condenser being connected with crystallization cylinder body, the heat exchanger being connected with the liquid discharge port of crystallization cylinder body, the preheating chamber being connected with the feed inlet of crystallization cylinder body, condenser is connected with heat exchanger, heat exchanger is connected with preheating chamber, the inner top surface of crystallization cylinder body is fixedly connected with motor, the output of motor is fixedly connected with rotating shaft, the lower surface of rotating shaft is fixedly connected with first stirring rod, and the outer surface of first stirring rod is fixedly connected with center stirring blade. Through the cooperation of crystallization cylinder body, condenser, heat exchanger and preheating chamber, the heat source in crystallization cylinder body and condenser is recovered and the incoming material is effectively preheated, the reuse of waste heat source is realized and the load of main evaporation unit is reduced, the external heating demand of main evaporation unit is significantly reduced, the overall evaporation energy consumption is reduced, and the energy consumption per unit output is lower.

Description

Technical Field

[0001] This utility model belongs to the technical field of evaporation crystallization devices, specifically a high-efficiency and energy-saving evaporation crystallization device. Background Technology

[0002] Evaporation crystallization is a core process in the industrial field for "solution concentration, solute recovery, and wastewater reduction." Its applications cover multiple key industries, and demand is growing, including the chemical, pharmaceutical, high-salinity wastewater zero-discharge, food, and light industries. These industries share common requirements: long-term continuous operation (300-350 days per year), large processing capacity, and high demands for operational stability and product quality. However, traditional equipment struggles to simultaneously balance high-efficiency production and low-energy operation. Evaporation crystallization is a typical "high-energy-consuming process"; the energy consumption of traditional equipment mainly comes from the heating and stirring of the main evaporation unit, which accounts for a large portion of the company's total energy consumption.

[0003] Meanwhile, an evaporation crystallization apparatus with application number CN202420680353.X includes a tank, with a heating mechanism and a scraping mechanism inside the tank. A feed hopper is fixedly connected to the outside of the tank, and two discharge pipes are fixedly connected to the bottom of the tank. A cavity is formed in the inner wall of the tank's internal cavity, and a heating plate is fixed inside the cavity. The scraping mechanism includes a motor fixed to the bottom of the tank, a connecting column fixed to the outside of the motor's output shaft, and a cylinder fixed to the top of the connecting column. A connecting rod is fixed to the side of the cylinder near the top of the cylinder. Scrapers are fixed to the opposite sides of the two connecting rods. A temperature sensor is fixed to the inner bottom wall of the cylinder. The heating mechanism includes an air pump fixed to the upper surface of the cylinder. An air pump is fixedly connected to an air suction pipe at its suction end and an air exhaust pipe at its exhaust end. A connecting pipe is rotatably connected to the top of the cylinder through a sealed bearing. A bending plate is fixed to the upper surface of the cylinder. Multiple stirring cylinders are fixedly connected to the outer side of the cylinder. Multiple connecting cylinders are fixedly connected to the outer side of each of the multiple stirring cylinders.

[0004] However, the following problems were found in the implementation of the relevant technologies: the heat flow is in a one-way loss mode, and no waste heat recovery closed loop is formed, resulting in high energy consumption. The heat released by the crystallization device during crystal precipitation and the heat released by steam condensation in the condenser are directly discharged through cooling water and are not recovered and utilized, resulting in high energy consumption, serious heat waste, and excessive load on the main evaporation unit.

[0005] Therefore, we propose a high-efficiency and energy-saving evaporation crystallization device. Utility Model Content

[0006] To address the problems mentioned in the background art, this utility model provides a high-efficiency and energy-saving evaporation crystallization device. It has the advantages of reducing overall evaporation energy consumption by recovering the heat source in the crystallization cylinder body and condenser and effectively preheating the feed. At the same time, it improves the stirring efficiency by driving two sets of stirring mechanisms through the cooperation of a motor and gears, with one set stirring at the center and the other set stirring around the edge.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency and energy-saving evaporation crystallization device, comprising a crystallization cylinder body, a condenser connected to the crystallization cylinder body, a heat exchanger connected to the liquid outlet of the crystallization cylinder body, and a preheating chamber connected to the feed inlet of the crystallization cylinder body. The condenser is connected to the heat exchanger, and the heat exchanger is connected to the preheating chamber. A motor is fixedly connected to the inner top surface of the crystallization cylinder body, and a rotating shaft is fixedly connected to the output end of the motor. A first stirring rod is fixedly connected to the lower surface of the rotating shaft, and a central stirring blade is fixedly connected to the outer surface of the first stirring rod. A connecting rod is fixedly connected to the outer surface of the rotating shaft, and a rotating rod is rotatably connected to the lower surface of the connecting rod. A driven gear is fixedly connected to the lower surface of the rotating rod, and a second stirring rod is fixedly connected to the lower surface of the driven gear. A second stirring blade is fixedly connected to the lower surface of the second stirring rod. An internal gear disk is fixedly connected to the inner surface of the crystallization cylinder body.

[0008] Preferably, the internal gear disk meshes with the driven gear.

[0009] Preferably, a rotating baffle is fixedly connected to the outer surface of the rotating shaft, the rotating baffle is located below the internal gear disk, and there is a gap between the rotating baffle and the internal gear disk.

[0010] Preferably, the width of the gap is greater than the diameter of the second stirring rod, and the second stirring rod is slidably connected to the gap.

[0011] Preferably, the size of the central stirring blade is larger than that of the second stirring blade.

[0012] Preferably, the rotating shaft is rotatably connected to the crystallizing cylinder body, and a sealed bearing is provided at the connection between the rotating shaft and the crystallizing cylinder body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the cooperation of the crystallization cylinder body, condenser, heat exchanger and preheating chamber, recovers the heat source in the crystallization cylinder body and condenser and effectively preheats the feed, realizes the reuse of waste heat source and reduces the load of the main evaporation unit, significantly reduces the external heating demand of the main evaporation unit, reduces the overall evaporation energy consumption, and has lower energy consumption per unit output. At the same time, the preheating chamber preheats the feed in a thermal balance, reduces the temperature difference and heat load when entering the main evaporation unit, and the heat source recovery forms a closed-loop thermal management, reducing the waste of heat source and cooling load.

[0014] 2. This utility model utilizes a motor, a rotating shaft, two stirring rods, two stirring blades, a connecting rod, a rotating rod, and a gear and internal gear disc to drive two sets of stirring mechanisms through the cooperation of a motor and gear. One set stirs at the center, while the other set stirs around the edge. The central stirring can quickly disperse and homogenize the central area of ​​the liquid, while the edge stirring covers the boundary layer area. The two sets of stirring work together to obtain a more uniform velocity field and viscosity distribution, reduce local shear differences, achieve more balanced crystal nucleation, and make the crystal morphology and particle size distribution more controllable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the crystallization cylinder of this utility model; Figure 3 This is a schematic diagram of the motor structure of this utility model.

[0016] In the diagram: 1. Crystallizer body; 2. Condenser; 3. Heat exchanger; 4. Preheating chamber; 5. Motor; 6. Rotating shaft; 7. Rotating baffle; 8. First stirring rod; 9. Central stirring blade; 10. Connecting rod; 11. Rotating rod; 12. Driven gear; 13. Second stirring rod; 14. Second stirring blade; 15. Internal gear disc. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1 to 3As shown, this utility model provides a high-efficiency and energy-saving evaporation crystallization device, including a crystallization cylinder body 1, a condenser 2 connected to the crystallization cylinder body 1, a heat exchanger 3 connected to the liquid outlet of the crystallization cylinder body 1, and a preheating chamber 4 connected to the feed inlet of the crystallization cylinder body 1. The condenser 2 is connected to the heat exchanger 3, and the heat exchanger 3 is connected to the preheating chamber 4. The device recovers heat from the crystallization cylinder body 1 and the condenser 2 and effectively preheats the feed, reducing the heating requirements and evaporation energy consumption of the main evaporation unit. A motor 5 is fixedly connected to the inner top surface of the crystallization cylinder body 1. A rotating shaft 6 is fixedly connected to the output end of the motor 5. A first stirring rod 8 is fixedly connected to the lower surface of the rotating shaft 6. A central stirring blade 9 is fixedly connected to the outer surface of the first stirring rod 8. A connecting rod 10 is fixedly connected to the outer surface of the rotating shaft 6. A rotating rod 11 is rotatably connected to the lower surface of the connecting rod 10. A driven gear 12 is fixedly connected to the lower surface of the rotating rod 11. A second stirring rod 13 is fixedly connected to the lower surface of the driven gear 12. A second stirring blade 14 is fixedly connected to the lower surface of the second stirring rod 13. An internal gear disc 15 is fixedly connected to the inner surface of the crystallizing cylinder body 1.

[0019] Specifically, the internal gear 15 meshes with the driven gear 12.

[0020] Furthermore, a rotating baffle 7 is fixedly connected to the outer surface of the rotating shaft 6. The rotating baffle 7 is located below the internal gear disk 15, and there is a gap between the rotating baffle 7 and the internal gear disk 15.

[0021] Furthermore, the width of the gap is greater than the diameter of the second stirring rod 13, and the second stirring rod 13 is slidably connected to the gap.

[0022] It is worth noting that the size of the central stirring blade 9 is larger than that of the second stirring blade 14.

[0023] It is worth noting that the rotating shaft 6 is rotatably connected to the crystallizing cylinder body 1, and a sealed bearing is provided at the connection between the rotating shaft 6 and the crystallizing cylinder body 1.

[0024] The crystallizing cylinder body 1, condenser 2, heat exchanger 3, and motor 5 are existing technologies and will not be described in detail. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described in detail. The "front, back, left, and right" perspectives of this device are... Figure 1 The direction shown in the diagram is the reference.

[0025] Working principle: During operation, the liquid discharged from the outlet of the crystallizer body 1 is transported through a pipeline to the heat exchanger 3. The heat exchanger 3 exchanges heat with the discharged liquid and transfers this heat to the preheating chamber 4. Simultaneously, the vapor phase from the crystallizer body 1 is condensed and its heat recovered by the condenser 2. This recovered heat is also exchanged through the heat exchanger 3 and transferred to the preheating chamber 4. This process recovers heat from the crystallizer body 1 and the condenser 2, effectively preheating the feed material and reducing the heating requirements and energy consumption of the main evaporation unit. Simultaneously, the motor 5 inside the crystallizer body 1 drives the rotating shaft 6 to rotate. The first stirring rod 8 and the central stirring blade 9 below are driven to rotate, and the material inside the crystallization cylinder body 1 is stirred by the first stirring rod 8 and the central stirring blade 9. At the same time, the rotation of the rotating shaft 6 drives the connecting rod 10 to rotate, so that the connecting rod 10 drives the second stirring rod 13 and the second stirring blade 14 to rotate around the center of the crystallization cylinder body 1. During the rotation of the connecting rod 10, the driven gear 12 below the connecting rod 10 drives the driven gear 12 to rotate by meshing with the teeth of the internal gear disk 15, so that the driven gear 12 rotates during the circular motion, thereby stirring the material at the edge of the crystallization cylinder body 1 by the second stirring rod 13 and the second stirring blade 14.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and energy-saving evaporation crystallization device, comprising a crystallization cylinder body (1), a condenser (2) connected to the crystallization cylinder body (1), a heat exchanger (3) connected to the liquid outlet of the crystallization cylinder body (1), and a preheating chamber (4) connected to the feed inlet of the crystallization cylinder body (1), wherein the condenser (2) is connected to the heat exchanger (3), the heat exchanger (3) is connected to the preheating chamber (4), and a motor (5) is fixedly connected to the inner top surface of the crystallization cylinder body (1), characterized in that: The output end of the motor (5) is fixedly connected to a rotating shaft (6), the lower surface of the rotating shaft (6) is fixedly connected to a first stirring rod (8), the outer surface of the first stirring rod (8) is fixedly connected to a central stirring blade (9), the outer surface of the rotating shaft (6) is fixedly connected to a connecting rod (10), the lower surface of the connecting rod (10) is rotatably connected to a rotating rod (11), the lower surface of the rotating rod (11) is fixedly connected to a driven gear (12), the lower surface of the driven gear (12) is fixedly connected to a second stirring rod (13), the lower surface of the second stirring rod (13) is fixedly connected to a second stirring blade (14), and the inner surface of the crystallizing cylinder body (1) is fixedly connected to an internal gear disc (15).

2. The high-efficiency and energy-saving evaporation crystallization device according to claim 1, characterized in that: The internal gear disk (15) meshes with the driven gear (12).

3. The high-efficiency and energy-saving evaporation crystallization device according to claim 1, characterized in that: A rotating baffle (7) is fixedly connected to the outer surface of the rotating shaft (6). The rotating baffle (7) is located below the internal gear disk (15), and there is a gap between the rotating baffle (7) and the internal gear disk (15).

4. The high-efficiency and energy-saving evaporation crystallization device according to claim 3, characterized in that: The width of the gap is greater than the diameter of the second stirring rod (13), and the second stirring rod (13) is slidably connected to the gap.

5. The high-efficiency and energy-saving evaporation crystallization device according to claim 1, characterized in that: The size of the central stirring blade (9) is larger than that of the second stirring blade (14).

6. The high-efficiency and energy-saving evaporation crystallization device according to claim 1, characterized in that: The rotating shaft (6) is rotatably connected to the crystallizing cylinder body (1), and a sealed bearing is provided at the connection between the rotating shaft (6) and the crystallizing cylinder body (1).

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