Multi-layer filtration purification tower for treating leachate by fly ash and waste activated carbon in cooperation

Abstract

The utility model relates to leachate treatment technical field, concretely is a kind of multilayer filtration purification tower of fly ash and waste activated carbon synergic treatment leachate, including tower body, the water inlet is fixedly connected in the top of tower body, the drainage outlet is fixedly connected in the bottom of tower body, the first filter frame is fixedly connected in the inside of tower body, the second filter frame is fixedly connected in the inside of tower body corresponding first filter frame bottom end position, the top of second filter frame is filled with fly ash layer, the top of first filter frame is filled with waste activated carbon adsorption layer, the utility model has beneficial effect: realize to treat waste with waste synergic disposal, two kinds of fly ash, waste activated carbon hazardous waste are as filter material and adsorption medium of leachate treatment, improve resource utilization, device and operation advantage is remarkable, device is multilayer filter, compact structure, simple operation and maintenance, rely on gravity filtration mainly, energy consumption is extremely low, filter material uses waste to be treated, need not frequently purchase new filter material, operating cost is low.

Description

Technical Field

[0001] This utility model relates to the field of leachate treatment technology, specifically a multi-layer filtration and purification tower for the synergistic treatment of leachate by fly ash and waste activated carbon. Background Technology

[0002] In the field of hazardous waste and high-concentration wastewater treatment, the disposal of fly ash from waste incineration, spent activated carbon from flue gas purification, and landfill leachate are all industry challenges. Fly ash, as hazardous waste, needs to be solidified and stabilized before being safely landfilled, which not only incurs high disposal costs but also occupies a large amount of land resources. Spent activated carbon is also hazardous waste and needs to be disposed of by qualified units through high-temperature incineration, which is very expensive. Landfill leachate has a complex composition and high pollutant concentration, and conventional methods such as biochemical and membrane treatment are required, which are cumbersome. In particular, there is still a lack of economical and efficient solutions for the treatment of membrane concentrate.

[0003] Currently, the treatment of these three pollutants mostly adopts independent process systems, without forming a collaborative treatment mechanism. This results in a fragmented overall treatment process, low resource utilization, and an inability to achieve simultaneous reduction of pollutants, making it difficult to meet the needs of efficient treatment and resource optimization in the environmental protection field. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer filtration and purification tower for the synergistic treatment of leachate by fly ash and waste activated carbon, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer filtration and purification tower for the synergistic treatment of leachate by fly ash and waste activated carbon, comprising a tower body, an inlet fixedly connected to the top of the tower body, an outlet fixedly connected to the bottom of the tower body, a first filter frame fixedly connected inside the tower body, a second filter frame fixedly connected inside the tower body at the position corresponding to the bottom of the first filter frame, the top of the second filter frame being filled with a layer of fly ash, the top of the first filter frame being filled with a layer of waste activated carbon adsorption, a water collection port fixedly connected inside the tower body at the position corresponding to the bottom of the second filter frame, feed windows fixedly connected to both the first and second filter frames on the side wall of the tower body, a water quality monitor fixedly installed on the other side wall of the tower body near the bottom, and a water collection cavity provided at the bottom of the tower body.

[0006] Preferably, the water inlet is connected to the tower body, and the drain outlet is connected to the water collection chamber.

[0007] Preferably, the fly ash layer is an ash layer formed by washing fly ash with leachate stock solution, and the waste activated carbon adsorption layer is an adsorption layer formed by filling with waste activated carbon.

[0008] Preferably, the probe tip of the water quality monitor penetrates the side wall of the tower and is located at the bottom inside the tower.

[0009] Preferably, the top diameter of the water inlet is larger than the bottom diameter.

[0010] Preferably, all the feed windows are in communication with the tower body.

[0011] Compared with the prior art, the beneficial effects of this utility model are: to realize the synergistic treatment of waste with waste, and to use fly ash and waste activated carbon as filter media and adsorption media for leachate treatment, thereby improving resource utilization. By optimizing the properties and utilization value of waste, leachate washing of fly ash can remove some chloride salts, reduce the difficulty of subsequent sintering or melting treatment of fly ash and the risk of dioxin resynthesis, and enhance its resource utilization potential. Waste activated carbon can make full use of its residual adsorption capacity, achieving the best use of resources without the need for expensive separate incineration treatment. To improve the treatment effect of leachate, the leachate is passed through a fly ash layer to remove suspended solids, heavy metals and some phosphorus, and then through a waste activated carbon layer to deeply adsorb dissolved organic matter, which significantly improves water quality, reduces the load on subsequent biological or deep treatment units, and facilitates effluent reuse or discharge in compliance with standards. The device boasts significant advantages in both its design and operation. It is a multi-layer filter with a compact structure and simple operation and maintenance. It relies primarily on gravity filtration, resulting in extremely low energy consumption. The filter media is made from the waste to be treated, eliminating the need for frequent purchases of new filter media. This leads to low operating costs, and the filter can ultimately be rendered harmless through high-temperature melting, combining practicality and environmental friendliness. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the bottom structure of this utility model; Figure 4 This is a cross-sectional structural diagram of the present invention.

[0013] In the diagram: 1. Tower body; 2. Inlet; 3. Outlet; 4. First filter frame; 5. Second filter frame; 6. Fly ash layer; 7. Waste activated carbon adsorption layer; 8. Water collection port; 9. Feed window; 10. Water quality monitor; 11. Water collection chamber. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-4 The present invention provides the following technical solution: A multi-layer filtration and purification tower for the synergistic treatment of leachate by fly ash and waste activated carbon includes a tower body 1, an inlet 2 fixedly connected to the top of the tower body 1, an outlet 3 fixedly connected to the bottom of the tower body 1, a first filter frame 4 fixedly connected inside the tower body 1, a second filter frame 5 fixedly connected inside the tower body 1 at the position corresponding to the bottom of the first filter frame 4, a fly ash layer 6 filled at the top of the second filter frame 5, a waste activated carbon adsorption layer 7 filled at the top of the first filter frame 4, a water collection port 8 fixedly connected inside the tower body 1 at the position corresponding to the bottom of the second filter frame 5, feed windows 9 fixedly connected to the side wall of the tower body 1 at the positions corresponding to the first filter frame 4 and the second filter frame 5, a water quality monitor 10 fixedly installed on the other side wall of the tower body 1 near the bottom, and a water collection chamber 11 provided at the bottom of the tower body 1.

[0016] Inlet 2 is connected to tower body 1, and outlet 3 is connected to collection chamber 11. Inlet 2 delivers leachate into tower body 1, and outlet 3 discharges the filtered liquid from collection chamber 11. Fly ash layer 6 is formed by washing the fly ash with the original leachate solution. It is formed by drying the fly ash after washing with the original leachate solution. This fly ash layer has thickness, which can effectively increase its adsorption capacity for the target substance by increasing the contact area and extending the contact time with the medium to be treated. In addition to the adsorption effect, the stable layered structure can prevent fly ash particles from being lost with the fluid, ensuring the continuity and stability of the adsorption process. The waste activated carbon adsorption layer 7 is an adsorption layer formed by filling with waste activated carbon. The probe head of the water quality monitor 10 penetrates the side wall of the tower body 1 and is located at the bottom of the tower body 1. The water quality monitor 10 is convenient for quality testing of the filtered liquid to determine whether it can be recycled. The feed windows 9 are all in communication with the tower body 1, and the feed windows 9 are convenient for feeding the first filter frame 4 and the second filter frame 5.

[0017] In use, the leachate is used as washing water in a reaction vessel to thoroughly mix and stir with the fly ash, dissolving and removing soluble chlorides and some heavy metals from the fly ash, resulting in a washed fly ash layer 6. After washing, the fly ash has a cleaner surface and more developed pores, enhancing its adsorption and filtration capabilities. It is mainly used to further remove suspended solids, heavy metals, and some phosphorus from the leachate. Then, waste activated carbon is used to fill and form a waste activated carbon adsorption layer 7. Utilizing its huge specific surface area and residual adsorption capacity, it deeply removes dissolved organic matter and some heavy metals from the leachate. When treating the leachate, it is fed into the top of the tower body 1 through the inlet 2. The leachate will settle downwards due to its own gravity, and during the settling process, it will first be filtered by the first filter frame. The waste activated carbon adsorption layer 7 on the filter 4 adsorbs and removes impurities from the liquid. Then, it passes through the fly ash layer 6 on the second filter frame 5, so that the leachate is purified and filtered again. The treated liquid is collected through the water collection port 8 into the water collection chamber 11 at the bottom of the tower body 1. At this time, the probe of the water quality monitor 10 will monitor the treated liquid to obtain water quality parameters. Depending on the water quality, it can be reused or discharged. The saturated filter media can be sent to the high-temperature melting system for final harmlessness and resource utilization. The tower body 1 has a compact overall structure, simple operation and maintenance, relies mainly on gravity filtration, has extremely low energy consumption, uses the waste to be treated as filter media, does not need to frequently purchase new filter media, has low operating costs, and can finally achieve harmlessness through high-temperature melting, which is both practical and environmentally friendly.

[0018] 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 multi-layer filtration and purification tower for the synergistic treatment of leachate by fly ash and spent activated carbon, characterized in that: The tower includes a tower body (1), with a water inlet (2) fixedly connected to the top of the tower body (1) and a drain outlet (3) fixedly connected to the bottom of the tower body (1). A first filter frame (4) is fixedly connected inside the tower body (1), and a second filter frame (5) is fixedly connected inside the tower body (1) at the position corresponding to the bottom of the first filter frame (4). The top of the second filter frame (5) is filled with a fly ash layer (6), and the top of the first filter frame (4) is filled with a waste activated carbon adsorption layer (7). A water collection port (8) is fixedly connected inside the tower body (1) at the position corresponding to the bottom of the second filter frame (5). A feed window (9) is fixedly connected to the side wall of the tower body (1) at the positions corresponding to the first filter frame (4) and the second filter frame (5). A water quality monitor (10) is fixedly installed on the other side wall of the tower body (1) near the bottom. A water collection chamber (11) is provided at the bottom of the tower body (1).

2. The multi-layer filtration and purification tower for synergistic treatment of leachate with fly ash and spent activated carbon according to claim 1, characterized in that: The water inlet (2) is connected to the tower body (1), and the drain outlet (3) is connected to the water collection chamber (11).

3. The multi-layer filtration and purification tower for the synergistic treatment of leachate by fly ash and spent activated carbon according to claim 1, characterized in that: The fly ash layer (6) is the fly ash layer formed after the leachate is washed with water, and the waste activated carbon adsorption layer (7) is the adsorption layer formed by filling with waste activated carbon.

4. The multi-layer filtration and purification tower for synergistic treatment of leachate with fly ash and spent activated carbon according to claim 1, characterized in that: The probe tip of the water quality monitor (10) penetrates the side wall of the tower body (1) and is located at the bottom of the tower body (1).

5. The multi-layer filtration and purification tower for synergistic treatment of leachate with fly ash and spent activated carbon according to claim 1, characterized in that: The top diameter of the water inlet (8) is larger than the bottom diameter.

6. The multi-layer filtration and purification tower for synergistic treatment of leachate with fly ash and spent activated carbon according to claim 1, characterized in that: All the feed windows (9) are in communication with the tower body (1).

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