A flue ash co-treatment system for high-concentration wastewater

Abstract

This utility model discloses a system for the co-processing of flue gas ash and high-concentration wastewater, comprising a material storage unit, a material conveying unit, a co-processing unit, and a finished product temporary storage unit. The material storage unit stores the materials to be processed and includes flue gas ash ton bags and a wastewater storage tank. The material conveying unit transports the flue gas ash and high-concentration wastewater to the co-processing unit for treatment. The finished product temporary storage unit is located at the rear of the co-processing unit and stores the treated flue gas ash. The co-processing unit includes a co-processing room, a flue gas ash feeding device, a stirring reaction tank, solidified waste ton bags, and an odor treatment device. This utility model's technical solution can significantly improve the treatment efficiency of flue gas ash and high-concentration wastewater, achieving waste-to-waste treatment, while reducing safety risks during the solidification process.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a system for the co-treatment of high-concentration wastewater by flue ash. Background Technology

[0002] With increasingly fierce market competition and rising environmental protection operating costs, waste-generating companies have further strengthened their in-depth waste reduction treatment. The concentration of various pollutants (COD, acidity, fluoride, nitrate, high salt, etc.) in the treated wastewater has increased significantly. However, the traditional high-concentration wastewater treatment system is currently facing challenges when treating wastewater with high fluoride content, nitric acid waste acid, and high salt content. The highly corrosive waste acid and salt in the reaction tank or pool can easily cause serious corrosion to rotating equipment, pipelines, and metering instruments. In addition, it is difficult to control the reaction endpoint during operation, which can easily lead to excessive addition of auxiliary materials and an increase in secondary waste generation during the treatment process, significantly increasing production costs.

[0003] However, most current commercially available treatments for flue gas ash and high-concentration wastewater (waste hydrofluoric acid, waste nitric acid, high COD wastewater, high salinity, etc.) are conducted separately, requiring two independent treatment systems to process the flue gas ash and high-concentration wastewater respectively. This results in high costs, high energy consumption, and low treatment efficiency. To address this, we propose a flue gas ash co-treatment system for high-concentration wastewater, which can simultaneously treat flue gas ash and high-concentration wastewater, significantly improving the treatment efficiency of both and achieving the effect of treating waste with waste. Utility Model Content

[0004] The main purpose of this invention is to propose a flue ash co-treatment system for high-concentration wastewater, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model proposes a flue gas ash co-processing high-concentration wastewater treatment system, comprising a material storage unit, a material conveying unit, a co-processing unit, and a finished product temporary storage unit. The material storage unit is equipped with a turnover area sufficient for more than five days of material and is used to store materials to be treated. The material storage unit includes flue gas ash ton bags and a wastewater storage tank. The flue gas ash ton bags are used to store flue gas ash to be treated, and the wastewater storage tank is used to store high-concentration wastewater to be treated. The material conveying unit is located at the front end of the co-processing unit and is used to transport the flue gas ash and high-concentration wastewater to the co-processing unit for treatment. The finished product temporary storage unit is located at the rear end of the co-processing unit and is a separate room used to store the treated flue gas ash material. The co-processing unit includes a co-processing room, a flue gas ash feeding device, and a mixing unit. The system includes a reaction tank, solidified waste ton bags, and an odor treatment device. The stirred reaction tank is located inside the co-processing room and is equipped with a stirrer. The front end of the flue ash feeding device is positioned above the stirred reaction tank, and the rear end of the flue ash feeding device extends outside the co-processing room. The flue ash feeding device is used to transport flue ash to be treated into the stirred reaction tank. A wastewater storage tank is connected to the stirred reaction tank via a water pipe equipped with a ball valve. A hopper is inclinedly positioned at the lower end of the stirred reaction tank. The solidified waste ton bags are located below the hopper and are used to collect and store the solidified material. The odor treatment device is located above the co-processing room and is connected to the co-processing room via a duct. The odor treatment device is used to collect and treat the waste gas generated in the co-processing room to prevent environmental pollution.

[0006] Optionally, the material conveying unit includes a forklift, the flue ash feeding device is a closed screw conveyor, the flue ash feeding device is arranged with an upward inclined structure, the rear end of the flue ash feeding device is provided with a feeding hopper, the feeding hopper is located outside the co-processing room, the front end of the flue ash feeding device is located above the mixing reaction tank, the flue ash ton bag is provided with hanging ears on both sides, the lifting plate of the forklift can pass through the hanging ears, and the flue ash ton bag is placed into the feeding hopper by the forklift.

[0007] Optionally, a bag opener device is provided at the bottom of the feeding hopper. The bag opener device has a conical structure and is provided with multiple feeding holes.

[0008] Optionally, the finished product storage unit is connected to an odor treatment device via a duct to collect and treat the waste gas generated within the finished product storage unit, thereby preventing environmental pollution.

[0009] The technical solution of this utility model has the following beneficial effects: The flue ash produced after the incineration of hazardous waste contains a large amount of heavy metals, polycyclic aromatic hydrocarbons, and unreacted slaked lime, among other toxic and harmful components. By employing solidification technology to harmlessly treat the flue ash, the waste acid in the high-concentration wastewater undergoes an acid-base neutralization reaction with the slaked lime in the flue ash. Furthermore, in the liquid state, the unreacted slaked lime in the high-concentration wastewater further reacts chemically with the heavy metals in the flue ash to produce precipitates, thereby further solidifying the heavy metals in the flue ash. This significantly increases the treatment capacity of the wastewater, especially for high-concentration wastewater (waste hydrofluoric acid, waste nitric acid, high COD wastewater, high salt, etc.) that is difficult to treat using conventional solidification methods. It also significantly reduces treatment costs, achieving waste-to-waste treatment while reducing safety risks during the solidification process. This utility model features a compact and reasonable layout, a simple process flow, high equipment reliability, and low energy consumption. It achieves the effect of turning waste into waste and solves the problem of odor collection and treatment during the reaction process, greatly improving the treatment efficiency of flue dust and high-concentration wastewater. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall framework structure of a flue ash co-treatment system for high-concentration wastewater according to an embodiment of the present invention;

[0012] Figure 2 This is a partial structural schematic diagram of a flue ash co-treatment system for high-concentration wastewater according to an embodiment of the present invention;

[0013] Figure 3 This is a partial structural schematic diagram from another perspective of a flue ash co-processing high-concentration wastewater treatment system according to an embodiment of the present invention.

[0014] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. 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. 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.

[0016] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0017] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0018] This utility model proposes a system for the treatment of high-concentration wastewater in conjunction with flue ash.

[0019] like Figures 1 to 3As shown in one embodiment of this utility model, the flue ash co-processing high-concentration wastewater treatment system includes a material storage unit 100, a material conveying unit 200, a co-processing unit 300, and a finished product temporary storage unit 400. The material storage unit 100 is provided with a turnover area sufficient for more than five days of material. The material storage unit 100 is used to store materials to be treated. The material storage unit 100 includes flue ash ton bags 101 and wastewater storage tanks 102. The flue ash ton bags 101 are used to store flue ash to be treated, and the wastewater storage tanks 102 are used to store high-concentration wastewater to be treated. The material conveying unit 200 is located at the front end of the co-processing unit 300. The material conveying unit 200 is used to convey the flue ash and high-concentration wastewater to be treated to the co-processing unit 300 for processing. The finished product storage unit 400 is located at the rear end of the co-processing unit 300. The finished product storage unit 400 is an independent room used to store the treated flue ash material. The co-processing unit 300 includes a co-processing room 301, a flue ash feeding device 302, a mixing reaction tank 303, solidified waste ton bags 304, and an odor treatment device. A stirred reaction tank 303 is located inside the co-processing room 301. The stirred reaction tank 303 is equipped with a stirrer. The front end of a flue ash feeding device 302 is positioned above the stirred reaction tank 303, and the rear end of the flue ash feeding device 302 extends outside the co-processing room. The flue ash feeding device 302 is used to transport flue ash to be processed into the stirred reaction tank 303. A wastewater storage tank 102 is connected to the stirred reaction tank 303 via a water pipe 103, which is equipped with a ball valve 104. A discharge valve is inclined at the lower end of the stirred reaction tank 303. The hopper 3031 and the solidified waste ton bag 304 are located below the hopper 3031. The solidified waste ton bag 304 is used to collect and store the solidified material. The odor treatment device 305 is located above the co-processing room 301. The odor treatment device 305 is connected to the co-processing room 301 through the air duct 3051. The odor treatment device 305 is used to collect and treat the waste gas generated in the co-processing room 301 to avoid environmental pollution. At the same time, it solves the problem of odor collection and treatment during the reaction process, and greatly improves the treatment efficiency of solidified high-concentration wastewater.

[0020] Specifically, the material conveying unit 200 includes a forklift 201, and the flue ash feeding device 302 is a closed screw conveyor, which avoids the overflow of flue ash dust during the conveying process, improves the on-site working environment, and avoids environmental pollution. The flue ash feeding device 302 is set with an upward inclined structure. The rear end of the flue ash feeding device 302 is provided with a feeding hopper 3021, which is located outside the co-processing room 301. The front end of the flue ash feeding device 302 is located above the mixing reaction tank 303. The flue ash ton bag 101 is provided with hanging ears on both sides. The lifting plate of the forklift 201 can pass through the hanging ears and put the flue ash ton bag into the feeding hopper 3021 through the forklift 201 to realize the feeding process.

[0021] Specifically, a bag opener device 3022 is provided at the bottom of the feeding hopper 3021. The bag opener device 3022 is a conical structure and has multiple feed holes. By utilizing the gravity of the flue ash ton bag as it sinks, the flue ash ton bag can be cut open to allow the material to fall into the screw conveyor, effectively avoiding workers having to climb to heights and reducing operational risks.

[0022] Specifically, the finished product storage unit 400 is connected to the odor treatment device through a duct to collect and treat the waste gas generated in the finished product storage unit 400, thereby avoiding environmental pollution. At the same time, it solves the problem of odor collection and treatment during the reaction process, and greatly improves the treatment efficiency of solidified high-concentration wastewater.

[0023] Specifically, the working principle and process of this utility model are as follows:

[0024] The flue ash produced after the incineration of hazardous waste contains a large amount of heavy metals, polycyclic aromatic hydrocarbons, and unreacted slaked lime, among other toxic and harmful components. By employing solidification technology to render the flue ash harmless, the waste acid in the high-concentration wastewater undergoes an acid-base neutralization reaction with the slaked lime in the flue ash. Furthermore, in the liquid state, the unreacted slaked lime in the high-concentration wastewater further reacts chemically with the heavy metals in the flue ash to produce precipitates, thus further solidifying the heavy metals. This significantly increases the treatment capacity of the wastewater, especially for high-concentration wastewater (waste hydrofluoric acid, waste nitric acid, high COD wastewater, high-salt wastewater, etc.) that is difficult to treat using conventional solidification methods. It also significantly reduces treatment costs, achieving waste-to-waste treatment while mitigating safety risks during the solidification process.

[0025] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A flue dust and high concentration wastewater disposal system, characterized by, The system includes a material storage unit, a material conveying unit, a co-processing unit, and a finished product temporary storage unit. The material storage unit has sufficient turnover area for more than five days' worth of materials and is used to store materials to be processed. The material storage unit includes flue ash ton bags and a wastewater storage tank. The flue ash ton bags store flue ash to be processed, and the wastewater storage tank stores high-concentration wastewater to be processed. The material conveying unit is located at the front end of the co-processing unit and is used to transport the flue ash and high-concentration wastewater to the co-processing unit for processing. The finished product temporary storage unit is located at the rear end of the co-processing unit and is a separate room used to store processed flue ash materials. The co-processing unit includes a co-processing room, a flue ash feeding device, a mixing reaction tank, solidified waste ton bags, and an odor treatment unit. The treatment device includes a stirred reaction tank located within the co-processing room, equipped with a stirrer. A flue ash feeding device is positioned above the stirred reaction tank, with its rear end extending outside the co-processing room. The flue ash feeding device is used to transport flue ash to be treated into the stirred reaction tank. A wastewater storage tank is connected to the stirred reaction tank via a water pipe equipped with a ball valve. A hopper is inclinedly positioned at the lower end of the stirred reaction tank. A solidified waste ton bag is located below the hopper and is used to collect and store the solidified material. An odor control device is located above the co-processing room and is connected to the co-processing room via a duct. The odor control device is used to collect and treat waste gas generated within the co-processing room to prevent environmental pollution.

2. The flue dust and high concentration wastewater treatment system according to claim 1, wherein The material conveying unit includes a forklift, and the flue ash feeding device is a closed screw conveyor with an upward inclined structure. The rear end of the flue ash feeding device is provided with a feeding hopper, which is located outside the co-processing room. The front end of the flue ash feeding device is located above the mixing reaction tank. The flue ash ton bag is provided with hanging ears on both sides. The lifting plate of the forklift can pass through the hanging ears to place the flue ash ton bag into the feeding hopper.

3. The flue dust and high concentration wastewater treatment system according to claim 2, wherein, The bottom of the feeding hopper is provided with a bag opener device, which is a conical structure and has multiple feed holes.

4. The flue dust synergic high concentration wastewater treatment system according to claim 1, characterized in that, The finished product storage unit is connected to an odor treatment device via a duct to collect and treat the waste gas generated within the unit, thus preventing environmental pollution.

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