Chemical wastewater deep purification zero discharge device

Abstract

The utility model relates to the technical field of chemical wastewater treatment, disclose a kind of chemical wastewater advanced purification zero discharge device, to solve the problem of the limited separation efficiency of traditional simple evaporation device, the chemical oxygen demand (COD) in distillate water is easy to exceed standard. The device includes evaporation chamber, the baffle is fixed with one side of evaporation chamber by bolt, one side is communicated with inlet pipe, bottom is communicated with outlet pipe, both sides inner wall is penetrated with heat exchange pipe, evaporation chamber inner wall is fixed with baffle, baffle top end is communicated with fixed cylinder, fixed cylinder top end rotates and penetrates through rotating shaft, rotating shaft bottom end extends to fixed cylinder and is equipped with multiple cyclone vane, in the utility model, rotating cyclone vane can block and throw down small droplet, demister can force ascending steam to change direction multiple times, intercept tiny droplet backflow, both cooperation reduces COD in distillate water, guarantees condensate purity, baffle is easy to disassemble, convenient for staff to carry out regular maintenance to evaporation chamber inside, suitable for advanced purification treatment of chemical wastewater.

Description

Technical Field

[0001] This utility model relates to the field of chemical wastewater treatment technology, and in particular to a device for deep purification and zero discharge of chemical wastewater. Background Technology

[0002] Chemical wastewater is characterized by its complex composition, high toxicity, high concentration, poor biodegradability, and high salinity (high-concentration brine), making it one of the most challenging categories of industrial wastewater to treat. Traditional "compliant discharge" models not only waste water resources but also pose environmental risks. Therefore, "deep purification" and "zero discharge" have become inevitable trends and stringent requirements for water resource management and environmental protection in the current chemical industry.

[0003] Currently, the traditional simple evaporation devices used often have limited separation efficiency, which can easily lead to excessive chemical oxygen demand (COD) in the distillate water, making it difficult to meet the water quality standards for reuse.

[0004] Therefore, we propose a zero-discharge device for deep purification of chemical wastewater. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a deep purification zero-discharge device for chemical wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A deep purification and zero-discharge device for chemical wastewater includes: An evaporation chamber has an opening on one side and a baffle is fixed to it with bolts. A water inlet pipe with a control valve is fixedly connected to one side of the evaporation chamber, and a water outlet pipe with a control valve is fixedly connected to the bottom of the evaporation chamber. A heat exchange tube is fixedly inserted between the inner walls of the two sides of the evaporation chamber. A partition is fixed to the inner wall of the evaporation chamber. A fixed cylinder is fixedly connected to the top of the partition. A rotating shaft passes through the top of the fixed cylinder. The bottom end of the rotating shaft extends into the fixed cylinder and is fixedly provided with multiple swirl vanes. An exhaust pipe is fixedly connected to the outer wall of the fixed cylinder. The top of the exhaust pipe extends to the outside of the evaporation chamber. Two parallel fixed frames are fixedly provided on the inner wall of the exhaust pipe. Multiple equidistant demisters are fixedly provided between the two fixed frames. The demisters are arranged in a wavy shape. The drive unit, located at the top of the evaporation chamber, is used to drive the rotating shaft.

[0007] In one possible design, the drive unit includes a motor and a shield fixed at the top of the evaporation chamber. The output shaft of the motor passes through the evaporation chamber and is fixed coaxially with the rotating shaft. A PLC controller is fixed on the inner wall of the shield. The motor is located inside the shield. Heat dissipation holes are provided on both sides of the shield.

[0008] In one possible design, wavy guide grooves are provided on both sides of the demister plate.

[0009] In one possible design, fixing plates are fixed to the inner walls of both sides of the exhaust pipe, and the fixing plates are arranged in a wavy shape on the side facing the demister plate.

[0010] In one possible design, a backflush pipe with a control valve is fixedly connected to one side of the exhaust pipe.

[0011] In one possible design, the bottom of the evaporation chamber is conical, and the partition is inverted V-shaped.

[0012] Beneficial effects: In this utility model, the chemical wastewater deep purification zero-discharge device, through the setting of structures such as swirl vanes and demisters, the rotating swirl vanes can block and gather small droplets and throw them down, and the demisters can physically force the rising steam to change direction rapidly multiple times, effectively intercepting and returning the evaporated tiny droplets. The combination of the two can effectively reduce the chemical oxygen demand (COD) in the distillate water and ensure the purity of the finally collected condensate. In this utility model, the chemical wastewater deep purification zero-discharge device has a baffle and other structures. The baffle is easy to disassemble, which makes it convenient for staff to regularly maintain the interior of the evaporation chamber. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a chemical wastewater deep purification zero-discharge device proposed in this utility model. Figure 2 This is a schematic diagram of the internal structure of the evaporation chamber of a deep purification zero-discharge device for chemical wastewater proposed in this utility model; Figure 3 This is a partial cross-sectional view of a zero-discharge device for deep purification of chemical wastewater proposed in this utility model.

[0014] In the diagram: 1. Evaporation chamber; 2. Baffle; 3. Water inlet pipe; 4. Water outlet pipe; 5. Heat exchanger pipe; 6. Partition plate; 7. Fixed cylinder; 8. Cover; 9. Motor; 10. Rotating shaft; 11. Swirl vane; 12. Exhaust pipe; 13. Fixed frame; 14. Demister plate; 15. Guide channel; 16. Fixed plate; 17. Backflush pipe. Detailed Implementation

[0015] 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.

[0016] In one embodiment: Refer to Figures 1-3An evaporation device includes: an evaporation chamber 1 with an open side; a baffle 2 fixedly connected to the edge of the opening of the evaporation chamber 1 by bolts evenly distributed around the baffle 2, forming a sealed structure at the connection between the baffle 2 and the evaporation chamber 1, which can prevent wastewater leakage and allow the baffle 2 to be quickly removed by unscrewing the bolts; an inlet pipe 3 fixedly connected to one side of the evaporation chamber 1, with a control valve installed on the inlet pipe 3, which can control the flow rate and start / stop of chemical wastewater entering the evaporation chamber 1 by adjusting the control valve; the wastewater is directly injected into the evaporation chamber 1 through the inlet pipe 3; an outlet pipe 4 fixedly connected to the bottom of the evaporation chamber 1, which is also equipped with a control valve for discharging the concentrated liquid or precipitate remaining after evaporation treatment; and a heat exchange tube 5 fixedly passing through the inner walls of both sides of the evaporation chamber 1, which passes laterally through the cavity of the evaporation chamber 1, with both ends extending to the outside of the evaporation chamber 1, respectively; and the wastewater in the evaporation chamber 1 is heated and evaporated or assisted in cooling by introducing a high-temperature medium or a low-temperature medium into the heat exchange tube 5. The baffle 6 is fixedly installed on the inner wall of the evaporation chamber 1. The baffle 6 is inverted V-shaped, with its two side edges tightly fitted to the inner wall of the evaporation chamber 1, and its bottom forming a stable support with the inner wall of the evaporation chamber 1. The top of the baffle 6 is fixedly connected to the fixed cylinder 7, which extends vertically upward and is connected to the cavity of the evaporation chamber 1 below the baffle 6. The steam generated by evaporation can enter the fixed cylinder 7 through the top opening of the baffle 6. The top of the fixed cylinder 7 is rotatably connected to the rotating shaft 10, and the bottom end of the rotating shaft 10 extends into the interior of the fixed cylinder 7. Multiple swirling vanes 11 are fixedly installed at this end. The multiple swirling vanes 11 are evenly distributed around the axis of the rotating shaft 10, and adjacent swirling vanes 11 maintain the same included angle, so that a stable swirling field can be formed when the rotating shaft 10 drives the swirling vanes 11 to rotate. The outer wall of the fixed cylinder 7 is fixedly connected to the exhaust pipe 12. The bottom end of the exhaust pipe 12 is connected to the side wall of the fixed cylinder 7, and the top end extends upward to the outside of the evaporation chamber 1 to discharge the steam after swirl treatment out of the evaporation chamber 1. Two parallel fixed frames 13 are fixedly installed on the inner wall of the exhaust pipe 12. The two fixed frames 13 are spaced apart along the length of the exhaust pipe 12 and are tightly fixed to the inner wall of the exhaust pipe 12. Multiple equidistant demisters 14 are fixed between the two fixed frames 13. The demisters 14 are wavy, and the spacing between adjacent demisters 14 is consistent to form a continuous wavy channel. Both sides of the exhaust pipe 12 are provided with wavy guide grooves 15, which match the wavy contour of the demister plate 14 and can guide the intercepted droplets to flow along the guide grooves 15. Fixing plates 16 are also fixedly installed on the inner walls of both sides of the exhaust pipe 12. The side of the fixing plate 16 facing the demister plate 14 is wavy, and the wavy curved surface corresponds to the wavy side of the demister plate 14 to form a synergistic guiding effect. One side of the exhaust pipe 12 is fixedly connected to the backwash pipe 17, and a control valve is installed on the backwash pipe 17. By opening the control valve, backwash medium can be introduced into the exhaust pipe 12 to clean the demister plate 14 and the swirl vane 11. This application can be used in the field of chemical wastewater treatment, or in other fields applicable to this application.

[0017] In another embodiment: a chemical wastewater deep purification zero-discharge device, applied to the field of chemical wastewater treatment, has a structure that is basically the same as the aforementioned embodiments, the difference being: In another aspect of this embodiment, a drive unit is disposed at the top of the evaporation chamber 1 to provide driving power for the rotating shaft 10. The drive unit includes a motor 9 and a shield 8. The motor 9 is fixedly mounted on the top surface of the evaporation chamber 1, and the shield 8 is also fixedly mounted on the top of the evaporation chamber 1, completely covering the motor 9 inside, thus protecting the motor 9. The output shaft of the motor 9 passes downward through the top wall of the evaporation chamber 1 and is coaxially fixedly connected to the top of the rotating shaft 10, so that the motor 9 can directly drive the rotating shaft 10 to rotate synchronously after starting. Operating Procedure: First, inject an appropriate amount of chemical wastewater into the evaporation chamber 1 through the control valve of the inlet pipe 3. After injection, close the control valve. Then, heat the wastewater in the evaporation chamber 1 by introducing a high-temperature medium through the heat exchange pipe 5. The wastewater gradually evaporates to form steam after being heated. At the same time, start the motor 9. The motor 9 drives the rotating shaft 10 to rotate. The rotating shaft 10 drives multiple swirl vanes 11 inside the fixed cylinder 7 to rotate. The steam flows upward, passes through the baffle 6, and enters the fixed cylinder 7. Under the action of the rotating swirl vanes 11, the small droplets in the steam are blocked and aggregated under the action of centrifugal force. The aggregated droplets flow downward along the inner wall of the fixed cylinder 7 back into the evaporation chamber 1. After being treated by swirl, the steam continues to rise into the exhaust pipe 12 and passes through the demister plate 14 between the two fixed frames 13. Since the demister plate 14 is wavy, the steam needs to change its flow direction abruptly several times when passing through the channel between the demister plates 14. The tiny droplets in the steam collide with the surface of the demister plate 14 due to inertia and are intercepted by the demister plate 14. The intercepted droplets flow downward along the guide grooves 15 on both sides of the demister plate 14 and then flow back into the evaporation chamber 1 through the fixed cylinder 7. Through the combined action of the swirl vane 11 and the demister plate 14, the tiny droplets in the steam can be effectively intercepted, reducing the chemical oxygen demand (COD) in the distillate water. When maintenance is required inside the evaporation chamber 1, the bolts around the baffle 2 can be unscrewed, and the baffle 2 can be removed. The staff can then clean and inspect the outer wall of the heat exchange tube 5, the fixed cylinder 7, and other structures inside the evaporation chamber 1 through the opening. After maintenance, the baffle 2 can be reattached to the edge of the opening of the evaporation chamber 1, and the bolts can be tightened to complete the assembly and restore the device to operation. After long-term use, if impurities adhere to the surface of the demister plate 14 and affect the ventilation effect, the control valve of the backflush pipe 17 can be opened to introduce backflush medium into the exhaust pipe 12 to backflush and clean the demister plate 14. The cleaned impurities are discharged with the backflush medium or return liquid, ensuring the interception effect of the demister plate 14. The concentrated liquid or precipitate generated during the evaporation process can be discharged from the evaporation chamber 1 by opening the control valve of the water outlet pipe 4 for convenient subsequent treatment.

[0018] However, as is well known to those skilled in the art, the working principle and wiring method of motor 9 are conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0019] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for deep purification and zero discharge of chemical wastewater, characterized in that, include: Evaporation chamber (1), one side of the evaporation chamber (1) is open and a baffle (2) is fixed with bolts. A water inlet pipe (3) with a control valve is fixedly connected to one side of the evaporation chamber (1). A water outlet pipe (4) with a control valve is fixedly connected to the bottom of the evaporation chamber (1). A heat exchange pipe (5) is fixedly passed between the inner walls of the two sides of the evaporation chamber (1). A partition (6) is fixedly installed on the inner wall of the evaporation chamber (1). A fixed cylinder (7) is fixedly connected to the top of the partition (6). A rotating shaft (10) is rotatably passed through the top of the fixed cylinder (7). The bottom end of the rotating shaft (10) extends into the fixed cylinder (7) and is fixedly provided with multiple swirl vanes (11). An exhaust pipe (12) is fixedly connected to the outer wall of the fixed cylinder (7). The top end of the exhaust pipe (12) extends to the outside of the evaporation chamber (1). Two parallel fixed frames (13) are fixedly installed on the inner wall of the exhaust pipe (12). Multiple equidistant demisting plates (14) are fixedly installed between the two fixed frames (13). The demisting plates (14) are arranged in a wavy shape. The drive unit, located at the top of the evaporation chamber (1), is used to drive the rotating shaft (10).

2. The chemical wastewater deep purification zero-discharge device according to claim 1, characterized in that, The drive unit includes a motor (9) and a shield (8) fixed at the top of the evaporation chamber (1). The output shaft of the motor (9) passes through the evaporation chamber (1) and is coaxially fixed with the rotating shaft (10). A PLC controller is fixed on the inner wall of the shield (8). The motor (9) is located inside the shield (8). Heat dissipation holes are provided on both sides of the shield (8).

3. The chemical wastewater deep purification zero-discharge device according to claim 2, characterized in that, The demister plate (14) has wave-shaped guide grooves (15) on both sides.

4. The chemical wastewater deep purification zero-discharge device according to claim 3, characterized in that, The inner walls on both sides of the exhaust pipe (12) are fixed with fixing plates (16), and the fixing plates (16) are arranged in a wave shape on the side facing the demister plate (14).

5. The chemical wastewater deep purification zero-discharge device according to claim 4, characterized in that, One side of the exhaust pipe (12) is fixedly connected to a backflush pipe (17) with a control valve.

6. The chemical wastewater deep purification zero-discharge device according to claim 5, characterized in that, The bottom of the evaporation chamber (1) is conical, and the partition (6) is inverted V-shaped.

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