Integrated leachate treatment device

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a leachate integrated treatment device which comprises a first adsorption precipitation unit, a Fenton oxidation unit and a second adsorption precipitation unit which are communicated in sequence, the first adsorption precipitation unit comprises a first-stage pH adjusting bin, a first-stage dosing bin and a first-stage precipitation tank which are communicated in sequence, the first-stage pH adjusting bin is communicated with a leachate water inlet, and the first-stage precipitation tank is communicated with the Fenton oxidation unit; the Fenton oxidation unit comprises a second-stage pH adjusting bin, a ferrous iron mixing bin, a Fenton reaction bin and a second-stage sedimentation tank which are communicated in sequence; the second-stage sedimentation tank is communicated with the second adsorption sedimentation unit; the second adsorption precipitation unit comprises a second-stage dosing bin, an adsorption reaction tank and a third-stage precipitation tank which are communicated in sequence. The technical problems that an existing leachate treatment device is large in occupied space, multiple in treatment equipment and incapable of meeting the requirement for small-scale leachate treatment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an integrated leachate treatment device. Background Art

[0002] Leachate refers to a high-concentration organic wastewater formed by the moisture contained in the garbage in the landfill, the rainwater, snow and other moisture that enters the landfill, minus the saturated water holding capacity of the garbage and covering soil layers, and passing through the garbage layer and covering soil layer. It contains a large amount of pollutants such as heavy metals.

[0003] In order to prevent leachate from polluting the environment, it is usually necessary to collect and treat the leachate before it can be discharged. The conventional treatment method is chemical treatment, which is to collect the leachate in a container, then add chemical precipitation agents to precipitate the heavy metals and other pollutants in the leachate, and finally treat the remaining wastewater before it can be discharged.

[0004] In the prior art, there is a landfill leachate treatment pool with publication number CN107416979B. The landfill leachate treatment pool described in the present invention has a stable structure. Through the design of anaerobic pools and aerobic pools, it can achieve diversified and rapid treatment of landfill leachate, avoid environmental pollution, and is environmentally friendly and reliable. Through the design of heating devices and stirring devices, it can achieve rapid anaerobic treatment, and through the design of aeration pipes, it can achieve rapid aerobic treatment, meeting the current use requirements. However, the treatment device in the above-mentioned prior art occupies a large space and has many treatment equipments, which cannot meet the needs of small-scale leachate treatment. Utility Model Content

[0005] The utility model aims at an integrated leachate treatment device, which is used to solve the technical problems that the existing leachate treatment device occupies a large space, has many treatment equipments and cannot meet the needs of small-scale leachate treatment.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The integrated leachate treatment device comprises a first adsorption precipitation unit, a Fenton oxidation unit, and a second adsorption precipitation unit which are connected in sequence;

[0008] The first adsorption precipitation unit comprises a primary pH adjustment chamber, a primary drug addition chamber and a primary precipitation tank which are connected in sequence, wherein the primary pH adjustment chamber is connected to a leachate inlet, and the primary precipitation tank is connected to the Fenton oxidation unit;

[0009] The Fenton oxidation unit comprises a secondary pH adjustment tank, a ferrous mixing tank, a Fenton reaction tank and a secondary sedimentation tank which are connected in sequence, and the secondary sedimentation tank is connected to the second adsorption precipitation unit;

[0010] The second adsorption precipitation unit includes a secondary drug adding chamber, an adsorption reaction tank and a tertiary precipitation tank which are connected in sequence.

[0011] Furthermore, the above-mentioned integrated leachate treatment device also includes an outer box body 1 and an outer box body 2 connected in series; the first adsorption precipitation unit and the Fenton oxidation unit are placed in the outer box body 1, and the second adsorption precipitation unit is placed in the outer box body 2.

[0012] Furthermore, the outer box body 2 also includes a clean water tank, which is connected to the primary sedimentation tank, the secondary sedimentation tank (240) and the tertiary sedimentation tank respectively; and a sludge filter press device is provided in the sludge tank.

[0013] Furthermore, the first-level drug adding chamber and the second-level drug adding chamber respectively include a No. 1 drug adding chamber and a No. 2 drug adding chamber, and the No. 1 drug adding chamber and the No. 2 drug adding chamber are connected.

[0014] Furthermore, the No. 1 dosing warehouse and the No. 2 dosing warehouse are connected to the No. 1 medicine tank and the No. 2 medicine tank respectively; the first-level pH adjustment warehouse and the second-level pH adjustment warehouse are connected to a sulfuric acid tank; the first-level sedimentation tank, the second-level sedimentation tank and the third-level sedimentation tank are connected to a flocculant tank.

[0015] Furthermore, the first adsorption precipitation unit, the Fenton oxidation unit and the second adsorption precipitation unit are all provided with an aeration device and a stirring device.

[0016] Beneficial effects of the utility model:

[0017] The utility model is composed of an outer box body 1 and an outer box body 2 connected in series, and a first adsorption precipitation unit, a Fenton oxidation unit, and a second adsorption precipitation unit are arranged in the box body. Compared with the existing treatment device, the device volume is saved and reduced, and the specific installation and operation are relatively simple. At the same time, the device is designed taking into account the mutual interference between different pollution factors in the leachate, adopts a distributed treatment method, simplifies the treatment process, and finally forms an integrated treatment device that can meet the needs of small-scale leachate treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a top view of the integrated leachate treatment device of the utility model.

[0019] The figure marks in the drawings of the specification include: outer box body 1, outer box body 2, first adsorption sedimentation unit 10, Fenton oxidation unit 20, second adsorption sedimentation unit 30, clean water tank 40, primary pH adjustment tank 110, primary dosing tank 120, primary sedimentation tank 130, secondary pH adjustment tank 210, ferrous mixing tank 220, Fenton reaction tank 230, secondary sedimentation tank 240, secondary dosing tank 310, adsorption reaction tank 320, tertiary sedimentation tank 330. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods: Example

[0021] The integrated leachate treatment device comprises an outer box body 1 and an outer box body 2 connected in series, wherein the outer box body 1 is provided with a first adsorption precipitation unit 10 and a Fenton oxidation unit 20, and the outer box body 2 is provided with a second adsorption precipitation unit 30 and a clear water tank 40.

[0022] The first adsorption precipitation unit 10, the Fenton oxidation unit 20, the second adsorption precipitation unit 30 and the clear water tank 40 are sequentially connected.

[0023] The first adsorption precipitation unit 10 includes a primary pH adjustment chamber 110, a primary dosing chamber 120 and a primary sedimentation tank 130 which are connected in sequence. The primary pH adjustment chamber 110 is connected with a leachate inlet. The leachate enters the primary sedimentation tank 130 in the treatment device through the leachate inlet and is connected with the Fenton oxidation unit 20.

[0024] The Fenton oxidation unit 20 includes a secondary pH adjustment chamber 210 , a ferrous mixing chamber 220 , a Fenton reaction chamber 230 and a secondary sedimentation tank 240 which are connected in sequence, wherein the secondary sedimentation tank 240 is connected to the second adsorption sedimentation unit 30 .

[0025] The second adsorption precipitation unit 30 includes a secondary drug adding chamber 310 , an adsorption reaction tank 320 and a tertiary precipitation tank 330 which are connected in sequence.

[0026] Furthermore, the clear water tank 40 is connected to the primary sedimentation tank 130, the secondary sedimentation tank 240 and the tertiary sedimentation tank 330 respectively, and a sludge filter press device is provided in the primary sedimentation tank 130, the secondary sedimentation tank 240 and the tertiary sedimentation tank 330. In this way, the supernatant of the primary sedimentation tank 130, the secondary sedimentation tank 240 and the tertiary sedimentation tank 330 can flow into the clear water tank 40 according to the treatment requirements and water quality, and flow out of the clear water tank 40 after pH adjustment. In this embodiment, the sludge filter press device includes a sludge dewatering device such as a sludge filter press, and its main function is to dewater and filter the settled sludge and then discharge it.

[0027] Furthermore, the primary dosing chamber 120 and the secondary dosing chamber 310 include a No. 1 dosing chamber and a No. 2 dosing chamber respectively, and the No. 1 dosing chamber and the No. 2 dosing chamber are connected. The No. 1 dosing chamber and the No. 2 dosing chamber are used to adjust the pH of the leachate to alkaline and remove zinc ions, lead ions and total phosphorus in the leachate.

[0028] Furthermore, the No. 1 dosing warehouse and the No. 2 dosing warehouse are connected to the No. 1 medicine tank and the No. 2 medicine tank respectively; the first pH adjustment warehouse 110 and the second pH adjustment warehouse 210 are connected to the sulfuric acid medicine tank; the first sedimentation tank 130, the second sedimentation tank 240 and the third sedimentation tank 330 are connected to the flocculant medicine tank. The No. 1 medicine tank and the No. 2 medicine tank are used to store adsorption precipitation agents, such as Secco MX1 and Secco MX2. The sulfuric acid tank is used to store dilute sulfuric acid solution; the flocculant tank is used to store flocculants required for sedimentation.

[0029] Furthermore, an aeration device and a stirring device are provided in the first adsorption precipitation unit 10, the Fenton oxidation unit 20, and the second adsorption precipitation unit 30. The aeration device and the stirring device can ensure that the leachate and the reagent are fully mixed, thereby improving the leachate treatment effect.

[0030] During specific use, the leachate is pumped into the first adsorption precipitation unit 10, first enters the first-level pH adjustment chamber 110 to adjust the pH to acidic, then passes through the No. 1 and No. 2 dosing chambers in the first-level dosing chamber 120 in sequence, and after adding drugs to adjust the pH to alkaline, passes through the first-level sedimentation tank 130, and after adding PAM for sedimentation, zinc ions, lead ions and most of the total phosphorus in the leachate are removed.

[0031] The leachate supernatant after sedimentation enters the Fenton oxidation unit 20, first passes through the secondary pH adjustment tank 210 to adjust the pH to acidic, and then enters the ferrous mixing tank 220 and the Fenton reaction tank 230 in sequence, where ferrous sulfate and hydrogen peroxide are added to react respectively to remove ammonia and other difficult-to-degrade toxic substances, and finally flows into the secondary sedimentation tank 240 to add PAM for sedimentation.

[0032] The leachate supernatant after the Fenton reaction flows into the second adsorption sedimentation unit 30, first passes through the No. 1 and No. 2 dosing chambers in the secondary dosing chamber 310, and after adding drugs to adjust the pH to alkalinity, enters the adsorption reaction tank 320 for reaction. After the reaction is completed, it flows into the tertiary sedimentation tank 330, and the supernatant after adding PAM sedimentation flows into the clear water tank 40, at which time most of the harmful substances in the leachate can be removed.

[0033] In summary, the utility model is composed of an outer box 1 and an outer box 2 connected in series, and a first adsorption precipitation unit 10, a Fenton oxidation unit 20 and a second adsorption precipitation unit 30 are arranged in the box. Compared with the existing treatment device, the device volume is saved and reduced, and the specific installation and operation are relatively simple. At the same time, the device is designed taking into account the mutual interference between different pollution factors in the leachate, adopts a distributed treatment method, simplifies the treatment process, and finally forms an integrated treatment device that can meet the needs of small-scale leachate treatment.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An integrated leachate treatment device, characterized in that: It comprises a first adsorption precipitation unit (10), a Fenton oxidation unit (20), and a second adsorption precipitation unit (30) which are connected in sequence; The first adsorption precipitation unit (10) comprises a primary pH adjustment chamber (110), a primary drug addition chamber (120) and a primary precipitation tank (130) which are connected in sequence, the primary pH adjustment chamber (110) being connected to a leachate inlet, and the primary precipitation tank (130) being connected to a Fenton oxidation unit (20); The Fenton oxidation unit (20) comprises a secondary pH adjustment chamber (210), a ferrous mixing chamber (220), a Fenton reaction chamber (230) and a secondary sedimentation tank (240) which are connected in sequence, and the secondary sedimentation tank (240) is connected to the second adsorption sedimentation unit (30); The second adsorption precipitation unit (30) comprises a secondary drug adding chamber (310), an adsorption reaction tank (320) and a tertiary precipitation tank (330) which are connected in sequence.

2. The integrated leachate treatment device according to claim 1, characterized in that: It also comprises an outer box body 1 (1) and an outer box body 2 (2) connected in series; the first adsorption precipitation unit (10) and the Fenton oxidation unit (20) are placed in the outer box body 1 (1), and the second adsorption precipitation unit (30) is placed in the outer box body 2 (2).

3. The integrated leachate treatment device according to claim 2, characterized in that: The second outer box body (2) also includes a clean water tank (40), and the clean water tank (40) is connected to the primary sedimentation tank (130), the secondary sedimentation tank (240) and the tertiary sedimentation tank (330) respectively; the primary sedimentation tank (130), the secondary sedimentation tank (240) and the tertiary sedimentation tank (330) are provided with a sludge filter press device.

4. The integrated leachate treatment device according to claim 3, characterized in that: The first-level drug adding chamber (120) and the second-level drug adding chamber (310) respectively comprise a No. 1 drug adding chamber and a No. 2 drug adding chamber, and the No. 1 drug adding chamber and the No. 2 drug adding chamber are connected.

5. The integrated leachate treatment device according to claim 4, characterized in that: The No. 1 drug adding warehouse and the No. 2 drug adding warehouse are respectively connected to a No. 1 drug tank and a No. 2 drug tank; the first pH adjustment warehouse (110) and the second pH adjustment warehouse (210) are connected to a sulfuric acid drug tank; and the first sedimentation tank (130) and the second sedimentation tank (240).

6. The integrated leachate treatment device according to claim 5, characterized in that: The first adsorption precipitation unit (10), the Fenton oxidation unit (20), and the second adsorption precipitation unit (30) are all provided with an aeration device and a stirring device.

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