Evaporative crystallization device for hardening of concentrated water

Abstract

The utility model discloses a kind of evaporation crystallization devices for hard removal of concentrated water, it is related to concentrated water processing technical field.The utility model includes crystallization tank;The inside of crystallization tank is fixed with partition cylinder, the lower end of partition cylinder is provided with filter cover, the inside of partition cylinder above filter cover is provided with locating plate, the inside of partition cylinder is provided with the plugging ring for plugging filter cover, the upper end surface of locating plate is fixed with the air cylinder for controlling plugging ring up and down movement, the upper end surface of crystallization tank is bolted with cover plate, the upper portion of cover plate is provided with flow pipeline, the outer wall of flow pipeline is wound with spiral preheating pipe.The utility model is in cooperation with air cylinder, plugging ring and filter cover, can ensure the effectiveness and purity of crystallization process, and also can ensure that it is convenient to separate crystallization and liquid, and the cooperation of spiral preheating pipe and flow pipeline, improve evaporation crystallization efficiency, realize energy recycling.

Description

Technical Field

[0001] This utility model belongs to the field of concentrated water treatment technology, and in particular relates to an evaporation and crystallization device for hardening concentrated water. Background Technology

[0002] With rapid industrial development, the discharge of industrial wastewater, especially high-salt, high-hardness concentrate, is increasing daily. This type of concentrate contains high concentrations of scale-forming ions such as calcium and magnesium. Direct discharge not only wastes water resources but also causes a series of problems such as pipe scaling, equipment blockage, and environmental pollution. Therefore, advanced treatment of concentrate to achieve "reduction, resource recovery, and harmlessness" has become an important issue in the field of water treatment technology. Evaporation crystallization technology, as an efficient and reliable terminal treatment method, can convert dissolved salts in concentrate into solid crystals, thereby achieving complete separation of water and salts. It is a key link in the process of hardening and zero-discharge of concentrate. In existing evaporation crystallization equipment, the raw liquid is heated in a heating chamber, and the generated steam enters the crystallization chamber to promote crystal growth. Solid-liquid separation is then achieved through centrifugation or filtration. However, this type of equipment still has some inherent drawbacks in actual operation: First, ensuring the effectiveness and purity of the crystallization process while also facilitating the separation of crystals from the liquid affects the purity and quality of the final crystallized product. Second, the large amount of secondary steam generated during the evaporation process is usually directly condensed and discharged, and its latent heat is not effectively recovered and utilized, resulting in huge energy consumption and high operating costs. Therefore, an evaporation crystallization device for hardness removal from concentrated water is provided to solve the above-mentioned problems. Utility Model Content

[0003] The purpose of this invention is to provide an evaporation and crystallization device for hardening concentrated water. By using a cylinder, a sealing ring, and a filter cover in combination, the device can ensure the effectiveness and purity of the crystallization process while also facilitating the separation of crystals from liquid. Furthermore, the combination of a spiral preheating tube and a flow pipe can improve the evaporation and crystallization efficiency and achieve energy recycling.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to an evaporation and crystallization device for hardening removal of concentrated water, comprising a crystallization tank; a partition cylinder is fixed inside the crystallization tank, a filter cover is provided at the lower end of the partition cylinder, a positioning plate is provided inside the partition cylinder above the filter cover, a sealing ring for sealing the filter cover is provided inside the partition cylinder, a cylinder for controlling the up and down movement of the sealing ring is fixed on the upper end face of the positioning plate, a cover plate is bolted to the upper end face of the crystallization tank, a flow pipe is provided above the cover plate, and one end of the flow pipe is inserted into the crystallization tank from the end face of the crystallization tank, a spiral preheating tube is wound around the outer wall of the flow pipe, and both ends of the spiral preheating tube pass through the cover plate and are inserted into the crystallization tank, a drain pipe connected to the inside of the partition cylinder is fixed on the lower end face of the outside of the crystallization tank, and a crystal discharge pipe connected to the inside of the crystallization tank is fixed on the lower end face of the outside of the crystallization tank.

[0005] The present invention is further configured such that a sealing ring is fixed on the lower end face of the sealing ring and is in contact with the bottom surface of the crystallization tank, a moving hole is provided through the middle of the upper end face of the positioning plate, and a moving rod passing through the moving hole is fixed on the upper end face of the sealing ring.

[0006] The present invention is further configured such that a linkage bar is provided above the sealing ring and bolted to the upper end face of the moving rod, and the piston end of the cylinder is bolted to the lower end of the linkage bar.

[0007] The present invention is further configured such that the inner wall of the separator cylinder has a plurality of vertical openings evenly distributed in a ring along the circumference, and the plurality of vertical openings penetrate the upper end of the separator cylinder. The periphery of the positioning plate is fixed with a plurality of assembly blocks that are slidably disposed inside the vertical openings, and the assembly blocks are connected to the bottom of the vertical openings by bolts.

[0008] The present invention is further configured such that an abutment ring is fixed on one end face of the spiral preheating tube, and a check plate is provided on the lower end face of the abutment ring.

[0009] The present invention is further configured such that a positioning hole is provided through the lower end face of the abutment ring, and a positioning rod is fixed at the position corresponding to the positioning hole on the upper end face of the anti-stop plate.

[0010] The present invention is further configured such that a circular plate is bolted to the upper end face of the positioning rod through the positioning hole, and a spring sleeved on the positioning rod is fixed to the lower end face of the circular plate, and the lower end face of the spring is connected to the upper end face of the abutment ring.

[0011] This utility model has the following beneficial effects: This invention uses a sealing ring that can move up and down under the control of a cylinder. During the evaporation and crystallization process, the sealing ring seals the filter cover to prevent untreated concentrated water from entering the separator, ensuring the effectiveness and purity of the crystallization process. After crystallization is completed, the filter cover can be opened to facilitate the separation of crystals and liquid.

[0012] This invention uses a spiral preheating tube wound around the outside of a flow pipe to preheat the incoming concentrated water with steam generated in the crystallizer, thereby increasing the initial temperature of the concentrated water before it enters the crystallizer, reducing subsequent heating energy consumption, improving evaporation and crystallization efficiency, and realizing energy recycling. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0016] Figure 3 This is a cross-sectional view of the crystallization tank in this utility model.

[0017] Figure 4 This is a structural assembly diagram of the positioning plate and sealing ring in this utility model.

[0018] Figure 5 This is a structural diagram of the positioning plate in this utility model.

[0019] Figure 6 This is a structural assembly diagram of the spiral preheating tube in this utility model.

[0020] Figure 7 This is an exploded view of the spiral preheating pipe and the check plate in this utility model.

[0021] The attached diagram lists the components represented by each number as follows: 1-Crystallization tank, 101-Drain pipe, 102-Crystallization discharge pipe, 103-Separator cylinder, 104-Vertical opening, 105-Filter cover, 2-Cover plate, 3-Flow pipe, 4-Spiral preheating pipe, 401-Check plate, 402-Abutment ring, 403-Positioning hole, 404-Positioning rod, 405-Circular plate, 406-Spring, 5-Positioning plate, 501-Sealing ring, 502-Sealing ring, 503-Moving rod, 504-Linkage bar, 505-Cylinder, 506-Moving hole, 507-Assembly block. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Please see Figures 1 to 7This utility model relates to an evaporation and crystallization device for hardening removal of concentrated water, comprising a crystallization tank 1; a partition cylinder 103 is fixed inside the crystallization tank 1, a filter cover 105 is provided at the lower end of the partition cylinder 103, a positioning plate 5 is provided inside the partition cylinder 103 above the filter cover 105, and a sealing ring 501 for sealing the filter cover 105 is provided inside the partition cylinder 103. By using the sealing ring 501, the sealing ring 501 blocks the filter cover 105 at the bottom of the partition cylinder 103, thus sealing the filter cover 105 and preventing concentrated water in the crystallization tank 1 from seeping into the partition cylinder 103, thereby facilitating the heating and evaporation of the concentrated water. A cylinder 505 for controlling the up-and-down movement of the sealing ring 501 is fixed on the upper end face of the positioning plate 5. A cover plate 2 is bolted to the upper end face of the crystallizer 1. A flow pipe 3 is provided above the cover plate 2. One end of the flow pipe 3 is inserted into the crystallizer 1 from the end face of the crystallizer 1. A spiral preheating pipe 4 is wound around the outer wall of the flow pipe 3. Both ends of the spiral preheating pipe 4 pass through the cover plate 2 and are inserted into the crystallizer 1. The spiral preheating pipe 4 is wound around the flow pipe 3 to continuously treat the flow pipe 3 with residual heat. This allows the concentrated water to gradually increase in temperature during the process of entering the crystallizer 1, which is beneficial for subsequent heating of the concentrated water and improving the efficiency of evaporation and crystallization. A drain pipe 101 connected to the inside of the separator cylinder 103 is fixed to the lower end face of the outside of the crystallizer 1. A crystal discharge pipe 102 connected to the inside of the crystallizer 1 is fixed to the lower end face of the outside of the crystallizer 1.

[0024] It should be noted that a heating structure is installed in crystallization tank 1 to heat the concentrated water inside the crystallization tank 1 and to treat the concentrated water to remove hard crystals.

[0025] Specifically, a sealing ring 502 is fixed to the lower end face of the sealing ring 501, which is in contact with the bottom surface of the crystallization tank 1. A moving hole 506 is opened through the middle of the upper end face of the positioning plate 5. A moving rod 503 passing through the moving hole 506 is fixed to the upper end face of the sealing ring 501. The cylinder 505 used controls the up and down movement of the sealing ring 501 and the sealing ring 502, which can facilitate the sealing or opening of the filter cover 105. A linkage bar 504 is provided above the sealing ring 501 and bolted to the upper end face of the moving rod 503. The piston end of the cylinder 505 is bolted to the lower end of the linkage bar 504. Multiple rings are evenly distributed along the circumference of the inner wall of the separator cylinder 103. A vertical opening 104, and multiple vertical openings 104, all penetrate the upper end of the partition cylinder 103. Multiple assembly blocks 507 are fixed on the periphery of the positioning plate 5 and are slidably disposed inside the vertical openings 104. The assembly blocks 507 are connected to the bottom of the vertical openings 104 by bolts. Through the limiting cooperation between the vertical openings 104 and the assembly blocks 507, the positioning plate 5 will not shake freely in the partition cylinder 103. Furthermore, the bolt connection between the assembly blocks 507 and the bottom of the vertical openings 104 is a detachable connection, so that the assembly blocks 507 can be disassembled in the vertical openings 104, so that the internal structure of the partition cylinder 103 can be disassembled and removed, and the disassembled structure can be replaced. One end face of the spiral preheating pipe 4 is fixed with an abutment ring 402. A check plate 401 is provided on the lower end face of the abutment ring 402. A positioning hole 403 is opened through the lower end face of the abutment ring 402. A positioning rod 404 is fixed on the upper end face of the check plate 401 at the position corresponding to the positioning hole 403. The positioning rod 404 slides up and down in the positioning hole 403 to ensure the stability of the position of the check plate 401. A circular plate 405 is bolted to the upper end face of the positioning rod 404 through the positioning hole 403. A sleeve is fixed on the lower end face of the circular plate 405. The spring 406 on the positioning rod 404, in conjunction with the circular plate 405, enables the stop plate 401 to automatically reset. The lower end face of the spring 406 is in contact with the upper end face of the abutment ring 402. Through the pushing of the circular plate 405 by the spring 406, the stop plate 401 is continuously in contact with the abutment ring 402, thereby ensuring that one end of the spiral preheating pipe 4 is blocked, so that the steam generated in the crystallizer 1 will only enter from the other end of the spiral preheating pipe 4, thus forming a flow loop for the steam in the spiral preheating pipe 4.

[0026] The operation process of this embodiment is as follows: First, the heating component in the crystallization tank 1 is controlled to work, and concentrated water is input from the inside of the flow pipe 3. Then, the concentrated water enters the crystallization tank 1 outside the separator 103. The concentrated water is continuously heated and evaporated to remove hard crystals. After the heating process is completed, the cylinder 505 is controlled to work. The cylinder 505 controls the sealing ring 501 to move to the position above the filter cover 105. At this time, the liquid in the crystallization tank 1 will permeate into the separator 103 and open the valve on the drain pipe 101, so that the liquid inside the separator 103 can be discharged. The filter cover 105 filters the crystals after crystallization into the crystallization tank 1, so that the crystal discharge pipe 102 is opened and the crystals can be discharged at the position of the crystal discharge pipe 102. Because the flow pipe 3 is set at an incline, the spiral preheating pipe 4 will be wound around the flow pipe 3 at an incline. The condensate formed by the steam condensing in the spiral preheating pipe 4 flows to its lower port (i.e. the port where the check plate 401 is installed) under the action of gravity. When the condensate accumulates to a certain extent, its pressure will overcome the elastic force of the spring 406 and push the check plate 401 up, thereby opening the port and allowing the condensate to be discharged back into the crystallizing tank 1. When the pressure decreases, the spring 406 pushes the check plate 401 to reset and reseal the port.

[0027] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. An evaporation and crystallization apparatus for hardening concentrated water, comprising a crystallization tank (1); characterized in that: The crystallization tank (1) has a partition cylinder (103) fixed inside. A filter cover (105) is provided at the lower end of the partition cylinder (103). A positioning plate (5) is provided inside the partition cylinder (103) above the filter cover (105). A sealing ring (501) for sealing the filter cover (105) is provided inside the partition cylinder (103). A cylinder (505) for controlling the up and down movement of the sealing ring (501) is fixed on the upper end face of the positioning plate (5). A cover plate (2) is bolted to the upper end face of the crystallization tank (1). (2) is provided with a flow pipe (3) above it, and one end of the flow pipe (3) is inserted into the crystallizer (1) from the end face of the crystallizer (1). The outer wall of the flow pipe (3) is wrapped with a spiral preheating pipe (4), and both ends of the spiral preheating pipe (4) pass through the cover plate (2) and are inserted into the crystallizer (1). The lower end face of the outside of the crystallizer (1) is fixed with a drain pipe (101) that communicates with the inside of the separator cylinder (103). The lower end face of the outside of the crystallizer (1) is fixed with a crystal discharge pipe (102) that communicates with the inside of the crystallizer (1).

2. The evaporation and crystallization apparatus for hardening concentrated water according to claim 1, characterized in that, The lower end face of the sealing ring (501) is fixed with a sealing ring (502) that is in contact with the bottom surface of the crystallization tank (1). The upper end face of the positioning plate (5) is provided with a moving hole (506) through the middle. The upper end face of the sealing ring (501) is fixed with a moving rod (503) that passes through the moving hole (506).

3. The evaporation and crystallization apparatus for hardening concentrated water according to claim 2, characterized in that, Above the sealing ring (501) is a linkage bar (504) bolted to the upper end face of the moving rod (503), and the piston end of the cylinder (505) is bolted to the lower end of the linkage bar (504).

4. The evaporation and crystallization apparatus for hardening concentrated water according to claim 1, characterized in that, The inner wall of the partition cylinder (103) is provided with a plurality of vertical openings (104) evenly distributed in a ring along the periphery, and the plurality of vertical openings (104) all penetrate the upper end of the partition cylinder (103). The periphery of the positioning plate (5) is fixed with a plurality of assembly blocks (507) which are respectively slidably disposed inside the vertical openings (104). The assembly blocks (507) are connected to the bottom of the vertical openings (104) by bolts.

5. The evaporation and crystallization apparatus for hardening concentrated water according to claim 1, characterized in that, One end face of the spiral preheating pipe (4) is fixed with an abutment ring (402), and a check plate (401) is provided on the lower end face of the abutment ring (402).

6. The evaporation and crystallization apparatus for hardening concentrated water according to claim 5, characterized in that, The lower end face of the abutment ring (402) is provided with a positioning hole (403), and the upper end face of the antistop plate (401) is fixed with a positioning rod (404) at the position corresponding to the positioning hole (403).

7. The evaporation and crystallization apparatus for hardening concentrated water according to claim 6, characterized in that, The positioning rod (404) is bolted to the upper end face of the positioning hole (403) and a circular plate (405) is fixed thereon. A spring (406) is sleeved on the positioning rod (404) and the lower end face of the circular plate (405) is connected to the upper end face of the abutment ring (402).

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