A device for removing fluorine and decoloring of coking wastewater by carbon catalysis

Abstract

This utility model discloses a device for defluorination and decolorization of carbon catalytic coking wastewater, belonging to the field of wastewater treatment technology. It includes a reaction body, a defluorination unit, a decolorization unit, and a filtration unit located within the reaction body. The reaction body is arranged with defluorination, decolorization, and filtration zones distributed from top to bottom to complete the defluorination, decolorization, and filtration treatment of the coking wastewater. A reflux path is formed between the defluorination and decolorization zones, and between the defluorination and filtration zones, respectively, through a reflux box and a guide box. This allows the wastewater to undergo defluorination treatment in different modes before and after the decolorization unit, improving the overall efficiency and effect of defluorination. Simultaneously, both oxidation-reduction and adsorption methods are used for decolorization of the coking wastewater. During the above process, the wastewater can circulate and interact between different treatment zones. This reflux mechanism can fully utilize the treatment capacity of each treatment zone, improving the overall treatment effect of the device on coking wastewater.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a device for defluorination and decolorization of carbon catalytic coking wastewater. Background Technology

[0002] Coking wastewater is the wastewater generated during the processes of coal-to-coke production, coal gas purification, and coking product recovery. It contains a large amount of organic pollutants, such as phenols, polycyclic aromatic hydrocarbons, and nitrogen-containing heterocyclic compounds, as well as various inorganic pollutants, among which fluoride ions are a typical inorganic pollutant.

[0003] Fluoride ions pose serious threats to the environment and human health at high concentrations. Environmentally, excessive fluoride ions released into water bodies can affect the growth and reproduction of aquatic organisms and alter the ecological balance of aquatic bodies. For example, high-fluoride water can cause abnormal development of fish bones and scales, reducing their survival ability. For human health, excessive intake of fluoride ions may lead to diseases such as dental fluorosis and skeletal fluorosis. When coking wastewater is discharged into the environment without effective defluorination treatment, it may ultimately affect human health through bioaccumulation in the food chain.

[0004] Therefore, there is an urgent need for a device for defluorination and decolorization of carbon catalytic coking wastewater. Existing devices only use a single defluorination mode, resulting in poor defluorination effect and difficulty in achieving a high defluorination rate. They lack a mechanism for inter-regional synergistic treatment, and each treatment link is relatively isolated. Wastewater cannot be treated efficiently and comprehensively during the treatment process, resulting in low overall treatment efficiency. Utility Model Content

[0005] To address the aforementioned problems, this utility model discloses a device for defluorination and decolorization of carbon catalytic coking wastewater.

[0006] The technical solution of this utility model is: a device for defluorination and decolorization of carbon catalytic coking wastewater, comprising a reaction body, a defluorination unit, a decolorization unit and a filtration unit disposed within the reaction body;

[0007] The reaction body consists of a defluorination zone, a decolorization zone, and a filtration zone from top to bottom. The defluorination zone has an addition port at the top and the filtration zone has an outlet on its side wall. The side wall of the reaction body is equipped with a reflux box and a flow guide box, and a flow guide port is provided between the defluorination zone and the decolorization zone.

[0008] The reflux box is provided with reflux bends at both the upper and lower ends, which are connected to the decolorization zone and the defluorination zone. A water pump is provided at the connection between the reflux bend and the decolorization zone. The guide box is provided with guide bends at both the upper and lower ends, which are connected to the defluorination zone and the filtration zone. Solenoid valves are provided at both the guide bend and the reflux bend.

[0009] The defluorination unit is located in the defluorination zone, the decolorization unit is located in the decolorization zone, and the filtration unit is located in the filtration zone.

[0010] Furthermore, the defluorination unit includes a stirring shaft located at the center of the defluorination zone, a rotary motor that drives the stirring shaft to rotate, and multiple membrane reaction plates distributed on each side wall of the defluorination zone. One end of each membrane reaction plate is hinged to the side wall of the defluorination zone, and the other end is provided with an arc-shaped notch that matches the outer wall of the stirring shaft. The upper end of each membrane reaction plate is driven to rotate by a hydraulic rod.

[0011] Explanation: The defluorination unit uses two modes to repeatedly defluorinate coking wastewater. In the first mode, hydraulic rods drive each membrane reactor to rotate to a horizontal position and close together, increasing the contact area with the coking wastewater. In this mode, the coking wastewater flowing into the defluorination zone through the inlet passes through the membrane reactors, removing fluoride ions. In the second mode, the water treated in the decolorization zone is pumped to a return tank via a pump and a return bend, and then returned to the defluorination zone through the upper return bend. In this mode, the membrane reactors are open, and reagents are added to the defluorination zone through the inlet. A rotary motor drives the stirring shaft, causing the reagents and wastewater to mix evenly and react, generating precipitate and achieving defluorination. By repeatedly treating the coking wastewater using these two modes, the final discharged wastewater has a lower fluoride content, better meeting environmental standards.

[0012] Furthermore, a guide cylinder is provided at the addition port, and an installation cylinder is connected to the center of the guide cylinder via a connecting rod. The rotary motor is installed inside the installation cylinder, and a sealing plate is provided at the upper end of the installation cylinder.

[0013] Note: When coking wastewater or reagents are introduced into the defluorination zone through the inlet, the wastewater or reagents will flow in through the space between the installation cylinder and the feed cylinder. This inflow space design facilitates the uniform distribution of wastewater or reagents within the defluorination zone, ensuring full contact between the wastewater and the membrane reaction plates and guaranteeing the treatment effect. Simultaneously, the installation cylinder is used to install the rotary motor. When heat dissipation is required, the sealing plate at its upper end is opened for periodic heat dissipation, ensuring the normal operation of the defluorination equipment.

[0014] Furthermore, the decolorization unit includes an anode plate and a cathode plate disposed within the decolorization zone. The anode plate is connected to the positive terminal of an external power supply, and the cathode plate is connected to the negative terminal of an external power supply.

[0015] Explanation: After the first defluorination treatment, the water flows into the decolorization zone through the guide port. At this time, electricity is applied to the anode and cathode plates, causing the organic matter in the water to be oxidized and decomposed, thereby oxidizing the colored substances into colorless or light-colored substances, thus achieving the decolorization effect and improving the treatment effect.

[0016] Furthermore, the filtration unit includes a sliding mounting plate inserted into the filtration zone and an activated carbon adsorption plate movably mounted on the sliding mounting plate. The side wall of the sliding mounting plate is provided with a sealing plate that fits tightly against the outer wall of the filtration zone. The activated carbon adsorption plate is provided with a pressure sensor, and the sealing plate is provided with an alarm at a position corresponding to the activated carbon adsorption plate.

[0017] Instructions: After the second defluorination treatment, the water flows into the flow box through the upper guide bend. Opening the solenoid valve allows the water to flow into the filtration zone through the lower guide bend. Here, the activated carbon adsorption plate adsorbs organic matter, colloids, residual chlorine, odor-causing substances, and other impurities in the water, achieving decolorization and purification. A pressure sensor detects the amount of residual debris on the activated carbon adsorption plate. When the alarm sounds, open the sliding mounting plate to remove and clean the activated carbon adsorption plate. This allows for convenient and intuitive cleaning of the activated carbon adsorption plate, ensuring optimal filtration results.

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a carbon catalytic defluorination and decolorization device for coking wastewater. In operation, the device comprises a defluorination zone, a decolorization zone, and a filtration zone arranged from top to bottom within the reaction body. This completes the defluorination, decolorization, and filtration treatment of the coking wastewater. A reflux path is formed between the defluorination and decolorization zones, and between the defluorination and filtration zones, via a reflux box and a guide box, respectively. This allows the wastewater to undergo defluorination treatment using both carbon catalysis and precipitation methods before and after the decolorization unit, improving the overall efficiency and effectiveness of defluorination. Simultaneously, both oxidation-reduction and adsorption methods are used for decolorization of the coking wastewater. The defluorination and decolorization processes are interleaved, allowing the wastewater to circulate and interact between different treatment zones. This reflux mechanism fully utilizes the treatment capacity of each zone, improving the overall treatment effect of the device on the coking wastewater. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of each membrane reaction plate of this utility model when closed;

[0022] Figure 3 This is a schematic diagram of the internal structure of each membrane reaction plate of this utility model when it is opened;

[0023] Figure 4 This is a partial structural diagram of the sealing plate of this utility model during installation in the feed cylinder;

[0024] Figure 5 This is a schematic diagram of the overall structure of the installation cylinder when the sealing plate of this utility model is closed and installed in the guide cylinder;

[0025] Figure 6 This is a schematic diagram of the overall structure of the installation cylinder when the sealing plate of this utility model is opened and installed in the guide cylinder;

[0026] Figure 7 This is a schematic diagram of the installation structure of the activated carbon adsorption plate of this utility model on a sliding mounting plate.

[0027] The components are as follows: 1-Reaction body, 10-Discharge port, 11-Defluorination zone, 110-Addition port, 112-Guide cylinder, 113-Connecting rod, 114-Installation cylinder, 115-Sealing plate, 12-Decolorization zone, 13-Filtration zone, 130-Water outlet, 14-Recirculation box, 140-Recirculation bend, 141-Water pump, 15-Guide box, 150-Guide bend, 151-Solenoid valve, 16-Guide port, 2-Defluorination unit, 20-Stirring shaft, 21-Rotating motor, 22-Membrane reaction plate, 221-Hydraulic rod, 3-Decolorization unit, 30-Anode plate, 31-Cathode plate, 4-Filtration unit, 40-Sliding mounting plate, 41-Activated carbon adsorption plate, 42-Sealing plate, 43-Pressure sensor, 44-Alarm. Detailed Implementation

[0028] Example 1: As Figure 1 , 2 As shown in Figures 1 and 3, a device for defluorination and decolorization of carbon catalytic coking wastewater includes a reaction body 1, a defluorination unit 2, a decolorization unit 3 and a filtration unit 4 disposed within the reaction body 1.

[0029] The reaction body 1 consists of a defluorination zone 11, a decolorization zone 12, and a filtration zone 13 from top to bottom. The defluorination zone 11 is provided with an addition port 110 at the top, and the filtration zone 13 is provided with an outlet 130 on the side wall. The side wall of the reaction body 1 is provided with a reflux box 14 and a flow guide box 15, and a flow guide port 16 is provided between the defluorination zone 11 and the decolorization zone 12.

[0030] The reflux box 14 is provided with reflux bends 140 at both ends, which are connected to the decolorization zone 12 and the defluorination zone 11. A water pump 141 is provided at the connection between the reflux bend 140 and the decolorization zone 12. The guide box 15 is provided with guide bends 150 at both ends, which are connected to the defluorination zone 11 and the filtration zone 13. Solenoid valves 151 are provided at both the guide bend 150 and the reflux bend 140. The reflux bend 140, the water pump 141, the guide bend 150 and the solenoid valve 151 all adopt existing technologies. For example, the reflux bend 140 and the guide bend 150 are both made of stainless steel. The water pump 141 is an existing centrifugal water pump. The solenoid valve 151 is a direct-acting solenoid valve with model number JL-V0930-001.

[0031] The defluorination unit 2 is located in the defluorination zone 11, the decolorization unit 3 is located in the decolorization zone 12, and the filtration unit 4 is located in the filtration zone 13.

[0032] The defluorination unit 2 includes a stirring shaft 20 located at the center of the defluorination zone 11, a rotary motor 21 that drives the stirring shaft 20 to rotate, and four membrane reaction plates 22 distributed on each side wall of the defluorination zone 11. One end of the membrane reaction plate 22 is hinged to the side wall of the defluorination zone 11, and the other end is provided with an arc-shaped notch that matches the outer wall of the stirring shaft 20. The upper end of each membrane reaction plate 22 is driven to rotate by a hydraulic rod 221. The defluorination unit 2 performs repeated defluorination treatment on the coking wastewater through two modes: carbon catalysis and precipitation, so that the fluoride content of the final discharged wastewater is lower and more in line with environmental protection standards. The stirring shaft 20, the rotary motor 21, and the membrane reaction plates 22 all adopt existing technologies. For example, the stirring shaft 20 adopts the existing spiral stirring shaft, the rotary motor 21 adopts the existing Y-series three-phase asynchronous motor, and the membrane reaction plates 22 adopt the existing ceramic membrane reaction plates.

[0033] like Figure 4 , 5 As shown in Figure 6, a guide cylinder 112 is provided at the addition port 110. An installation cylinder 114 is connected to the center of the guide cylinder 112 via a connecting rod 113. The rotary motor 21 is installed inside the installation cylinder 114, and a sealing plate 115 is provided at the upper end of the installation cylinder 114. When coking wastewater or reagents are introduced into the defluorination zone 11 through the addition port 110, the coking wastewater or reagents will flow in from the space between the installation cylinder 114 and the guide cylinder 112. This design of the inflow space is conducive to the uniform distribution of wastewater or reagents in the defluorination zone 11, so that the wastewater can fully contact the membrane reaction plate 22 in the defluorination zone and ensure the treatment effect of coking wastewater. At the same time, the installation cylinder 114 is used to install the rotary motor 21. When heat dissipation is required, the sealing plate 115 at its upper end is opened for periodic heat dissipation to ensure the normal operation of the defluorination equipment.

[0034] The decolorization unit 3 includes an anode plate 30 and a cathode plate 31 disposed in the decolorization zone 12. The anode plate 30 is connected to the positive terminal of an external power supply, and the cathode plate 31 is connected to the negative terminal of an external power supply. After the first defluorination treatment, the water falls into the decolorization zone 12 through the guide port 16. At this time, electricity is supplied to the anode plate 30 and the cathode plate 31, causing the organic matter in the water to be oxidized and decomposed, thereby oxidizing the colored substances into colorless or light-colored substances, thus achieving the decolorization effect and improving the treatment effect. The anode plate 30 and the cathode plate 31 both adopt existing technologies. For example, the anode plate 30 can be a ZT-24 type anode plate, and the cathode plate 31 can be a cathode plate from a PEM water electrolysis cell.

[0035] like Figure 7As shown, the filter unit 4 includes a sliding mounting plate 40 inserted into the filter zone 13 and an activated carbon adsorption plate 41 movably mounted on the sliding mounting plate 40. The side wall of the sliding mounting plate 40 is provided with a sealing plate 42 that fits tightly against the outer wall of the filter zone 13. A pressure sensor 43 is provided on the activated carbon adsorption plate 41. An alarm 44 is provided on the sealing plate 42 at a position corresponding to the activated carbon adsorption plate 41. After the second defluorination treatment, the water flows into the guide box 15 through the upper guide bend 150. When the solenoid valve 151 is opened, the water flows into the filter through the lower guide bend 150. In zone 13, the activated carbon adsorption plate 41 adsorbs impurities such as organic matter, colloids, residual chlorine, and odor substances in the water, achieving the purpose of decolorization and water purification. The pressure sensor 43 detects the amount of residual impurities on the activated carbon adsorption plate 41. When the alarm 44 sounds, the sliding mounting plate 40 is opened, and the activated carbon adsorption plate 41 can be removed for cleaning. This allows for convenient and intuitive cleaning of the activated carbon adsorption plate 41, ensuring the filtration effect. The activated carbon adsorption plate 41, pressure sensor 43, and alarm 44 all adopt existing technologies. The activated carbon adsorption plate 41 can be an ACF 03 activated carbon adsorption plate, the pressure sensor 43 can be an MPX2010 pressure sensor, and the alarm 44 can be an A9091T audible and visual alarm.

[0036] The method of using a carbon catalytic coking wastewater defluorination and decolorization device according to this embodiment includes the following steps:

[0037] S1. Drive each membrane reaction plate 22 to rotate to a horizontal position and close with each other by hydraulic rod 221. The coking wastewater is passed into the defluorination zone 11 through the space between the installation cylinder 114 and the feed cylinder 112. The wastewater will be treated by membrane separation through the membrane reaction plate 22 to remove fluoride ions from the wastewater and complete the first defluorination treatment.

[0038] S2. Drive each membrane reaction plate 22 to separate by hydraulic rod 221. At this time, the water treated in step S1 will flow to the lower end of the defluorination zone 11 and fall into the decolorization zone 12 through the guide port 16. At this time, the anode plate 30 and the cathode plate 31 are energized to oxidize and decompose the organic matter in the water, thereby oxidizing the colored substances into colorless or light-colored substances, thus achieving the purpose of the first decolorization.

[0039] S3. The water treated in the decolorization zone 12 is pumped to the return tank 14 through the pump 141 and the return bend 140, and then returned to the defluorination zone 11 through the return bend 140 at the top. At this time, PAC agent is added to the defluorination zone 11 through the addition port 110. The rotating motor 21 drives the stirring shaft 20 to rotate, so that the agent and wastewater are mixed evenly and react to generate precipitate, thereby achieving the purpose of the second defluorination.

[0040] S4. After the second defluorination treatment, the water flows into the guide box 15 through the upper guide bend 150. Open the solenoid valve 151, and the water flows into the filter area 13 through the bottom guide bend 150. At this time, the water will flow through each activated carbon adsorption plate 41 from top to bottom. The organic matter, colloids, residual chlorine, odor substances and other impurities in the water will be adsorbed by the pores on the surface of the activated carbon, achieving the purpose of the second decolorization. The treated water can be discharged through the outlet 130.

Claims

1. A device for defluorination and decolorization of carbon catalytic coking wastewater, characterized in that, It includes a reaction body (1), a defluorination unit (2), a decolorization unit (3), and a filtration unit (4) disposed within the reaction body (1); The reaction body (1) contains, from top to bottom, a defluorination zone (11), a decolorization zone (12), and a filtration zone (13). The defluorination zone (11) has an addition port (110) at its upper end, and the filtration zone (13) has an outlet (130) on its side wall. The reaction body (1) has a reflux box (14) and a flow guide box (15) on its side wall, and a flow guide port (16) is provided between the defluorination zone (11) and the decolorization zone (12). The reflux box (14) is provided with reflux bends (140) at both ends, which are connected to the decolorization zone (12) and the defluorination zone (11). A water pump (141) is provided at the connection between the reflux bend (140) and the decolorization zone (12). The guide box (15) is provided with guide bends (150) at both ends, which are connected to the defluorination zone (11) and the filtration zone (13). Solenoid valves (151) are provided at both the guide bend (150) and the reflux bend (140). The defluorination unit (2) is located in the defluorination zone (11), the decolorization unit (3) is located in the decolorization zone (12), and the filtration unit (4) is located in the filtration zone (13).

2. The apparatus for defluorination and decolorization of carbon catalytic coking wastewater according to claim 1, characterized in that, The defluorination unit (2) includes a stirring shaft (20) located at the center of the defluorination zone (11), a rotary motor (21) that drives the stirring shaft (20) to rotate, and multiple membrane reaction plates (22) distributed on each side wall of the defluorination zone (11). One end of the membrane reaction plate (22) is hinged to the side wall of the defluorination zone (11), and the other end is provided with an arc-shaped notch that matches the outer wall of the stirring shaft (20). The upper end of each membrane reaction plate (22) is driven to rotate by a hydraulic rod (221).

3. The apparatus for defluorination and decolorization of carbon catalytic coking wastewater according to claim 2, characterized in that, The feeding port (110) is provided with a guide cylinder (112), and the center of the guide cylinder (112) is connected to an installation cylinder (114) via a connecting rod (113). The rotary motor (21) is installed inside the installation cylinder (114), and a sealing plate (115) is provided at the upper end of the installation cylinder (114).

4. The apparatus for defluorination and decolorization of carbon catalytic coking wastewater according to claim 1, characterized in that, The decolorization unit (3) includes an anode plate (30) and a cathode plate (31) disposed in the decolorization zone (12). The anode plate (30) is connected to the positive terminal of an external power supply, and the cathode plate (31) is connected to the negative terminal of an external power supply.

5. The apparatus for defluorination and decolorization of carbon catalytic coking wastewater according to claim 1, characterized in that, The filter unit (4) includes a sliding mounting plate (40) inserted into the filter area (13) and an activated carbon adsorption plate (41) movably mounted on the sliding mounting plate (40). The side wall of the sliding mounting plate (40) is provided with a sealing plate (42) that fits tightly against the outer wall of the filter area (13). The activated carbon adsorption plate (41) is provided with a pressure sensor (43). The sealing plate (42) is provided with an alarm (44) at a position corresponding to the activated carbon adsorption plate (41).

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