Evaporative crystallization device with zero wastewater discharge

Abstract

This utility model discloses an evaporation crystallization device with zero wastewater discharge, belonging to the field of wastewater treatment technology. It includes a fixed cylinder, inside which a heating cylinder is rotatably connected. A heating coil is provided between the fixed cylinder and the heating cylinder. A connecting ring is installed at the bottom of the heating cylinder, rotatably connected to the bottom of the fixed cylinder. A collection box is fixedly installed at the bottom of the fixed cylinder, communicating with the heating cylinder. Two fixing rings are fixedly installed on the outer side of the fixed cylinder. Multiple support legs are fixedly installed at the bottom of the lower fixing ring. A wall-cleaning mechanism is installed on the inner wall of the heating cylinder. A fixing frame is fixedly installed on the upper fixing ring. This utility model solves the problems of easy scaling and low thermal efficiency in traditional evaporation crystallization devices through the synergistic effect of rotary heating, centrifugal separation, and dynamic wall cleaning, achieving efficient and continuous operation of wastewater treatment.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically, it relates to an evaporation crystallization device with zero wastewater discharge. Background Technology

[0002] With rapid industrialization, the discharge of industrial wastewater has increased year by year, among which high-salinity and high-concentration organic wastewater causes serious environmental pollution. Traditional wastewater treatment methods (such as biochemical treatment and membrane separation) are difficult to effectively treat high-salinity wastewater, while evaporation crystallization technology has become one of the key technologies for high-salinity wastewater treatment because it can achieve "zero discharge" of wastewater and resource recovery of salt. Currently, common evaporation crystallization devices mainly include multi-effect evaporators, mechanical vapor recompression (MVR) evaporators, and forced circulation evaporation crystallizers.

[0003] However, during the heating process of traditional evaporators, the salt in the wastewater is prone to crystallize and deposit on the heating wall, which leads to a decrease in heat transfer efficiency and even blockage of the equipment, requiring frequent shutdowns for cleaning and affecting continuous operation.

[0004] To address the aforementioned issues, this application proposes an evaporation crystallization apparatus with zero wastewater discharge. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes an evaporation crystallization device with zero wastewater discharge to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An evaporation crystallization device with zero wastewater discharge includes a fixed cylinder, a heating cylinder rotatably connected inside the fixed cylinder, a heating coil between the fixed cylinder and the heating cylinder, a connecting ring installed at the bottom of the heating cylinder, the connecting ring being rotatably connected to the bottom of the fixed cylinder, a collection box fixedly installed at the bottom of the fixed cylinder, the collection box being in communication with the heating cylinder, two fixed rings fixedly installed on the outside of the fixed cylinder, and multiple support legs fixedly installed at the bottom of the lower fixed ring.

[0008] The wall cleaning mechanism is installed on the inner wall of the heating cylinder. A fixed frame is fixedly installed on the upper fixed ring of the two fixed rings, and the wall cleaning mechanism is connected to the fixed frame for transmission.

[0009] Preferably, the wall cleaning mechanism includes a scraper ring, which is slidably mounted on the inner wall of the heating cylinder. An annular baffle is fixedly mounted on the top of the scraper ring, and an annular collection box is fixedly mounted on the top of the heating cylinder. The annular baffle and the annular collection box cooperate with each other.

[0010] The scraper ring moves up and down to clean the inner wall of the heating cylinder, which facilitates more efficient heating of the wastewater inside the heating cylinder. At the same time, the crystals after cleaning are introduced into the annular collection box and collection tank for collection.

[0011] Preferably, a fixing rod is fixedly installed at the bottom of the fixing frame, a fixing roller is fixedly installed at the bottom end of the fixing rod, a circulating cam groove is opened on the fixing roller, a slide block is movably sleeved on the fixing roller, a slider is fixedly installed on the inner side of the slide block, the slider is slidably connected to the circulating cam groove, and multiple mounting rods are fixedly installed on the outer side of the slide block, the mounting rods are fixedly connected to the scraper ring.

[0012] The slide block is fixedly connected to the scraper ring via multiple mounting rods, allowing the moving slide block to drive the scraper ring to move up and down. At the same time, the rotating heating cylinder, through its sliding connection with the scraper ring, drives the scraper ring to rotate. The scraper ring drives the slide block to rotate, and the slide block, through its sliding connection with the circulating cam groove, can move up and down on the fixed roller.

[0013] Preferably, the heating cylinder has multiple arc-shaped concave plates on its side, which cooperate with the heating coil, and multiple push plates are fixedly installed on the inner side of the heating cylinder.

[0014] By setting up the arc-shaped concave plate, the side wall area of ​​the heating cylinder can be increased, thereby increasing the heat utilization rate. At the same time, the push plate can drive the wastewater inside the heating cylinder to form a centrifugal rotation when the heating cylinder rotates. The centrifuged wastewater adheres to the inner wall of the heating cylinder, thereby performing the heating operation.

[0015] Preferably, a motor is fixedly mounted on the upper fixed ring of the two fixed rings, a drive gear is fixedly mounted on the output shaft of the motor, and an external gear ring is fixedly mounted on the outer side of the annular collection box, with the drive gear meshing with the external gear ring.

[0016] The motor's output shaft drives the annular collection box to rotate through the meshing of the drive gear and the external gear ring, which in turn drives the heating cylinder to rotate.

[0017] Preferably, an inlet pipe is installed on one side of the collection box, the bottom of the collection box is open, and a sealing plate is threadedly connected to the bottom of the collection box.

[0018] The inlet pipe facilitates the injection of wastewater into the collection tank and heating cylinder, while the sealing plate facilitates the discharge of crystals from the collection tank.

[0019] In summary, the technical effects and advantages of this utility model are as follows:

[0020] 1. Integrated design of dynamic rotary heating and centrifugal separation

[0021] The heating cylinder is driven to rotate by a motor, and the centrifugal force generated by the inner push plate forces the wastewater to adhere to the inner wall of the heating cylinder, which significantly improves the heat transfer efficiency. At the same time, the centrifugal force accelerates solid-liquid separation and reduces the adhesion of crystals to the wall surface.

[0022] 2. Self-cleaning wall cleaning mechanism driven by a spiral cam

[0023] The wall cleaning mechanism converts the rotational motion of the heating cylinder into the reciprocating motion of the scraper ring by cooperating with the circulating cam groove on the fixed roller and the slide block, thereby achieving dynamic scraping of crystals and avoiding the scaling problem of traditional static heating. The scraper ring, annular baffle and collection box form a closed collection channel, and cleaning and crystal recovery are completed simultaneously.

[0024] 3. High-efficiency heat utilization structure optimization

[0025] The heating cylinder sidewall is designed with multiple arc-shaped concave plates to increase the heating area and cooperate with the heating coil in a non-contact manner, reducing heat loss; the rotating heating cylinder ensures that the wastewater is heated evenly, avoiding local overheating or coking.

[0026] 4. Modular and detachable collection system

[0027] The bottom of the collection box is designed with a threaded sealing plate to facilitate the rapid cleaning of crystals; the annular collection box and the scraper ring rotate together to achieve continuous discharge of crystals and reduce downtime for maintenance.

[0028] 5. Integrated transmission and spatial layout

[0029] The meshing transmission between the drive gear and the external gear ring is directly integrated on the fixed ring, resulting in a compact structure; the wall cleaning mechanism supported by the fixed rod is linked with the inside and outside of the rotary heating cylinder, simplifying mechanical complexity.

[0030] This invention solves the problems of easy scaling and low thermal efficiency in traditional evaporation crystallization devices by combining rotary heating, centrifugal separation and dynamic wall cleaning, thus achieving efficient and continuous operation of wastewater treatment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of this utility model from below;

[0033] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0034] Figure 4 This is a cross-sectional view of the heating cylinder of this utility model;

[0035] Figure 5 This is a schematic diagram of the wall cleaning mechanism of this utility model.

[0036] In the picture:

[0037] 1. Fixed cylinder; 2. Heating cylinder; 3. Connecting ring; 4. Collection box; 5. Liquid inlet pipe; 6. Cleaning mechanism; 61. Fixed roller; 62. Slide seat; 63. Scraper ring; 64. Annular baffle; 65. Mounting rod; 66. Fixed rod; 7. Fixed ring; 8. Fixed frame; 9. Motor; 10. Drive gear; 11. External gear ring; 12. Support leg; 14. Sealing plate; 15. Annular collection box; 16. Push plate; 17. Heating coil. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0039] Reference Figure 1-5 An evaporation crystallization device with zero wastewater discharge includes a fixed cylinder 1, a heating cylinder 2 rotatably connected inside the fixed cylinder 1, a heating coil 17 between the fixed cylinder 1 and the heating cylinder 2, a connecting ring 3 installed at the bottom of the heating cylinder 2, the connecting ring 3 rotatably connected to the bottom of the fixed cylinder 1, a collection box 4 fixedly installed at the bottom of the fixed cylinder 1, the collection box 4 communicating with the heating cylinder 2, two fixed rings 7 fixedly installed on the outside of the fixed cylinder 1, and multiple support legs 12 fixedly installed at the bottom of the lower fixed ring 7.

[0040] The wall cleaning mechanism 6 is installed on the inner wall of the heating cylinder 2. A fixing frame 8 is fixedly installed on the upper fixing ring 7 of the two fixing rings 7. The wall cleaning mechanism 6 is connected to the fixing frame 8 for transmission.

[0041] Reference Figure 1 and Figure 4The wall cleaning mechanism 6 includes a scraper ring 63, which is slidably mounted on the inner wall of the heating cylinder 2. An annular baffle 64 is fixedly mounted on the top of the scraper ring 63. An annular collection box 15 is fixedly mounted on the top of the heating cylinder 2. The annular baffle 64 and the annular collection box 15 cooperate with each other. A fixing rod 66 is fixedly mounted on the bottom of the fixing frame 8. A fixing roller 61 is fixedly mounted on the bottom end of the fixing rod 66. A circulating cam groove is formed on the fixing roller 61. A sliding block 62 is movably sleeved on the fixing roller 61. A slider is fixedly mounted on the inner side of the sliding block 62, and the slider is slidably connected to the circulating cam groove. Multiple mounting rods 65 are fixedly mounted on the outer side of the sliding block 62. The mounting rods 65 are connected to the scraper ring 63. The ring 63 is fixedly connected, and the slide 62 is fixedly connected to the scraper ring 63 through multiple mounting rods 65, so that the moving slide 62 can drive the scraper ring 63 to move up and down. At the same time, the rotating heating cylinder 2 drives the scraper ring 63 to rotate through the sliding connection with the scraper ring 63. The scraper ring 63 drives the slide 62 to rotate. The slide 62 is slidably connected to the circulating cam groove through the slider, so that it can move up and down on the fixed roller 61. Through the up and down movement of the scraper ring 63, the inner wall of the heating cylinder 2 can be cleaned, so as to facilitate more efficient heating of the wastewater in the heating cylinder 2. At the same time, the crystals after cleaning are introduced into the annular collection box 15 and the collection box 4 for collection.

[0042] Reference Figure 4 The heating cylinder 2 has multiple arc-shaped concave plates on its side, which cooperate with the heating coil 17. Multiple push plates 16 are fixedly installed on the inner side of the heating cylinder 2. By setting the arc-shaped concave plates, the side wall area of ​​the heating cylinder 2 can be increased, thereby increasing the heat utilization rate. At the same time, the push plates 16 can drive the wastewater inside the heating cylinder 2 to form a centrifugal rotation when the heating cylinder 2 rotates. The centrifuged wastewater adheres to the inner wall of the heating cylinder 2, thereby performing the heating operation.

[0043] Reference Figure 2 A motor 9 is fixedly installed on the upper fixed ring 7 of the two fixed rings 7. A drive gear 10 is fixedly installed on the output shaft of the motor 9. An external gear ring 11 is fixedly installed on the outside of the annular collection box 15. The drive gear 10 and the external gear ring 11 mesh with each other. The output shaft of the motor 9 can drive the annular collection box 15 to rotate through the meshing of the drive gear 10 and the external gear ring 11, thereby driving the heating cylinder 2 to rotate.

[0044] Reference Figure 2 A liquid inlet pipe 5 is installed on one side of the collection box 4. The bottom of the collection box 4 is open and a sealing plate 14 is threadedly connected to the bottom of the collection box 4. The liquid inlet pipe 5 facilitates the injection of wastewater into the collection box 4 and the heating cylinder 2. At the same time, the sealing plate 14 facilitates the discharge of crystals in the collection box 4.

[0045] Working principle: During operation, wastewater enters the collection tank 4 through the inlet pipe 5. When the wastewater reaches the push plate 16, the motor 9 is switched on. The output shaft of the motor 9 meshes with the external gear ring 11 through the drive gear 10, thereby driving the annular collection box 15 to rotate, which in turn drives the heating cylinder 2 to rotate. When the heating cylinder 2 rotates, it causes the wastewater inside the heating cylinder 2 to undergo a centrifugal rotation. The centrifuged wastewater adheres to the inner wall of the heating cylinder 2, thereby performing a heating and evaporation operation. The rotating heating cylinder 2 is slidably connected to the scraper ring 63, which drives the scraper ring 63 to rotate. The scraper ring 63 drives the slide block 62 to rotate. The slide block 62 is slidably connected to the circulating cam groove through the slider, thereby moving up and down on the fixed roller 61. The up and down movement of the scraper ring 63 cleans the inner wall of the heating cylinder 2, thus facilitating more efficient heating of the wastewater inside the heating cylinder 2. At the same time, the crystals after cleaning are introduced into the annular collection box 15 and the collection tank 4 for collection. The sealing plate 14 facilitates the discharge of crystals from the collection tank 4.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An evaporation crystallization device with zero wastewater discharge, comprising a fixed cylinder (1), characterized in that, The heating cylinder (2) is rotatably connected inside the fixed cylinder (1). A heating coil (17) is provided between the fixed cylinder (1) and the heating cylinder (2). A connecting ring (3) is installed at the bottom of the heating cylinder (2). The connecting ring (3) is rotatably connected to the bottom of the fixed cylinder (1). A collection box (4) is fixedly installed at the bottom of the fixed cylinder (1). The collection box (4) is connected to the heating cylinder (2). Two fixed rings (7) are fixedly installed on the outside of the fixed cylinder (1). Multiple support legs (12) are fixedly installed at the bottom of the lower fixed ring (7). The wall cleaning mechanism (6) is installed on the inner wall of the heating cylinder (2). A fixing frame (8) is fixedly installed on the upper fixing ring (7) of the two fixing rings (7). The wall cleaning mechanism (6) is connected to the fixing frame (8) for transmission.

2. The evaporation crystallization device with zero wastewater discharge according to claim 1, characterized in that, The wall cleaning mechanism (6) includes a scraper ring (63), which is slidably installed on the inner wall of the heating cylinder (2). An annular baffle (64) is fixedly installed on the top of the scraper ring (63), and an annular collection box (15) is fixedly installed on the top of the heating cylinder (2). The annular baffle (64) and the annular collection box (15) cooperate with each other.

3. The evaporation crystallization device with zero wastewater discharge according to claim 2, characterized in that, A fixing rod (66) is fixedly installed at the bottom of the fixing frame (8). A fixing roller (61) is fixedly installed at the bottom end of the fixing rod (66). A circulating cam groove is opened on the fixing roller (61). A slide block (62) is movably sleeved on the fixing roller (61). A slider is fixedly installed on the inner side of the slide block (62). The slider is slidably connected to the circulating cam groove. Multiple mounting rods (65) are fixedly installed on the outer side of the slide block (62). The mounting rods (65) are fixedly connected to the scraper ring (63).

4. The evaporation crystallization device with zero wastewater discharge according to claim 1, characterized in that, The heating cylinder (2) has multiple arc-shaped concave plates on its side, which cooperate with the heating coil (17), and multiple push plates (16) are fixedly installed on the inner side of the heating cylinder (2).

5. The evaporation crystallization device with zero wastewater discharge according to claim 1, characterized in that, A motor (9) is fixedly installed on the upper fixed ring (7) of the two fixed rings (7), a drive gear (10) is fixedly installed on the output shaft of the motor (9), and an external gear ring (11) is fixedly installed on the outside of the annular collection box (15). The drive gear (10) and the external gear ring (11) mesh with each other.

6. The evaporation crystallization device with zero wastewater discharge according to claim 1, characterized in that, The collection box (4) is equipped with an inlet pipe (5) on one side, the bottom of the collection box (4) is open, and the bottom of the collection box (4) is threadedly connected to a sealing plate (14).

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