Wastewater treatment device adopting reciprocating multi-section degradation of high-concentration waste liquid

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment device for degrading high-concentration waste liquid in a reciprocating multi-section manner. According to the wastewater treatment device for degrading the high-concentration waste liquid in the reciprocating type multi-section mode, wastewater is transferred to all the stages to be subjected to reciprocating type treatment through the wastewater transfer pump according to the concentration condition of the wastewater, the wastewater is subjected to the reciprocating type multi-section conveying treatment process, and the high-concentration waste liquid of all the concentrations can be treated. According to the utility model, chemical treatment and biological treatment are fused, so that the whole treatment effect is more stable and more economical; the modularized device is adopted, the occupied space is small, installation and combination are convenient, the on-site installation time can be greatly shortened, and therefore the time cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and more specifically to a wastewater treatment device which adopts a reciprocating multi-stage method for degrading high-concentration waste liquid. Background Art

[0002] As the country's requirements for environmental governance become increasingly stringent, wastewater discharge indicators are becoming lower and lower, and the performance of wastewater purification equipment is also becoming higher and higher. The organic pollutants in high-concentration organic waste liquids have high concentrations of COD, NH3-N and total nitrogen that are difficult to degrade, making sewage treatment difficult.

[0003] At present, this type of high-concentration difficult-to-degrade waste liquid is basically sent to downstream hazardous waste disposal units for co-incineration treatment as hazardous waste. Pollutants such as COD, NH3-N and total nitrogen in the waste liquid are catalytically burned in high-temperature and high-pressure furnaces and converted into CO2, NO2, etc. This method of waste liquid disposal has extremely high costs and is difficult to promote and apply.

[0004] Therefore, it is an urgent problem for technical personnel in this field to provide a wastewater treatment device with low wastewater treatment cost, which can adjust operating energy consumption and drug consumption according to actual needs, occupies a small space and has high sewage treatment efficiency. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a wastewater treatment device which has low manufacturing cost, good sewage treatment effect and treatment capacity that can be adjusted according to the actual concentration of the wastewater and adopts a reciprocating multi-stage degrading high-concentration waste liquid.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions, which mainly include:

[0007] A wastewater treatment device that uses a reciprocating multi-stage degradation of high-concentration waste liquid, including an equipment room, a water inlet, a wastewater collection tank, a Fenton reaction tank, a sludge discharge port, an intermediate water tank, a hydrolysis acidification tank, a biochemical anoxic tank, a biochemical aerobic tank and an MBR membrane tank. The equipment room is provided with a dosing device, a wastewater lifting pump, a water tank lifting pump and a wastewater transfer pump. The wastewater collection tank is provided with a water inlet. The wastewater collection tank is connected to the Fenton reaction tank through the wastewater lifting pump. The Fenton The reaction tank is provided with a sludge discharge port, the Fenton reaction tank is connected to the dosing device, the Fenton reaction tank is connected to the intermediate water tank, the intermediate water tank is connected to the hydrolysis acidification tank through the water tank lifting pump, the hydrolysis acidification tank is connected to the biochemical anoxic tank, the biochemical anoxic tank is connected to the biochemical aerobic tank, the biochemical aerobic tank is connected to the MBR membrane tank, and the MBR membrane tank is respectively connected to the Fenton reaction tank, the hydrolysis acidification tank, the biochemical anoxic tank and the biochemical aerobic tank through the wastewater transfer pump.

[0008] Preferably, the dosing device includes a PAC dosing device, a PAM dosing device, a ferrous sulfate dosing device, a sulfuric acid dosing device, a liquid alkali dosing device and a hydrogen peroxide dosing device, and the PAC dosing device, the PAM dosing device, the ferrous sulfate dosing device, the sulfuric acid dosing device, the liquid alkali dosing device and the hydrogen peroxide dosing device are respectively connected to the Fenton reaction tank.

[0009] Preferably, a blower is provided in the equipment room, and the blower is respectively connected to the wastewater collection tank and the biochemical aerobic tank.

[0010] Preferably, an electrical control cabinet is also provided in the equipment room, and the electrical control cabinet is connected to the blower, the dosing device, the wastewater lifting pump, the pool lifting pump and the wastewater transfer pump circuit.

[0011] Preferably, a Fenton reaction agitator is provided in the Fenton reaction tank.

[0012] Preferably, a hydrolysis agitator is provided in the hydrolysis acidification tank.

[0013] Preferably, an anoxic agitator is provided in the biochemical anoxic tank.

[0014] Preferably, an MBR membrane group is provided in the MBR membrane pool.

[0015] It can be seen from the above technical scheme that compared with the prior art, the utility model adopts a reciprocating multi-stage degradation of high-concentration waste liquid, filling the gap in this type of wastewater treatment method. The wastewater treatment device is equipped with a biodegradation process, which utilizes the self-degradation effect of activated sludge microorganisms to convert COD, TN and NH3-N pollutants in the wastewater into harmless CO2 and N2 emissions. The operating and disposal costs are low. The manufacturing cost of this device is low. Compared with continuous equipment, the device can perform multi-stage reciprocating treatment according to process control, and the processing capacity can be adjusted according to the actual concentration of the wastewater and the technical level. The operating energy consumption and drug consumption can be adjusted according to actual needs, and the equipment occupies a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Explanation of the reference numerals: 1-water inlet, 2-wastewater collection tank, 3-blower, 4-wastewater lifting pump, 5-Fenton reaction tank, 6-PAC dosing device, 7-PAM dosing device, 8-ferrous sulfate dosing device, 9-sulfuric acid dosing device, 10-liquid alkali dosing device, 11-hydrogen peroxide dosing device, 12-Fenton reaction agitator, 13-sludge discharge port, 14-intermediate water tank, 15-water tank lifting pump, 16-hydrolysis acidification tank, 17-hydrolysis agitator, 18-biochemical anoxic tank, 19-anoxic agitator, 20-biochemical aerobic tank, 21-MBR membrane tank, 22-MBR membrane group, 23-wastewater transfer pump, 24-electrical control cabinet, 25-equipment room. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example

[0021] A wastewater treatment device that uses a reciprocating multi-stage degradation of high-concentration waste liquid, such as Figure 1 As shown, it includes an equipment room 25, a water inlet 1, a wastewater collection tank 2, a Fenton reaction tank 5, a sludge discharge port 13, an intermediate water tank 14, a hydrolysis acidification tank 16, a biochemical anoxic tank 18, a biochemical aerobic tank 20 and an MBR membrane tank 21. The equipment room 25 is provided with a dosing device, a wastewater lifting pump 4, a water tank lifting pump 15 and a wastewater transfer pump 23. The wastewater collection tank 2 is provided with a water inlet 1. The wastewater collection tank 2 is connected to the Fenton reaction tank 5 through the wastewater lifting pump 4. The Fenton reaction tank 5 is provided with a sludge discharge port 13. The Fenton reaction tank 5 is connected to the dosing device, the Fenton reaction tank 5 is connected to the intermediate water tank 14, the intermediate water tank 14 is connected to the hydrolysis acidification tank 16 through the water tank lifting pump 15, the hydrolysis acidification tank 16 is connected to the biochemical anoxic tank 18, the biochemical anoxic tank 18 is connected to the biochemical aerobic tank 20, the biochemical aerobic tank 20 is connected to the MBR membrane tank 21, and the MBR membrane tank 21 is respectively connected to the Fenton reaction tank 5, the hydrolysis acidification tank 16, the biochemical anoxic tank 18 and the biochemical aerobic tank 20 through the wastewater transfer pump 23.

[0022] In order to further optimize the above scheme, the dosing device includes a PAC dosing device 6, a PAM dosing device 7, a ferrous sulfate dosing device 8, a sulfuric acid dosing device 9, a liquid alkali dosing device 10 and a hydrogen peroxide dosing device 11, and the PAC dosing device 6, the PAM dosing device 7, the ferrous sulfate dosing device 8, the sulfuric acid dosing device 9, the liquid alkali dosing device 10 and the hydrogen peroxide dosing device 11 are respectively connected to the Fenton reaction tank 5.

[0023] In order to further optimize the above solution, a blower 3 is provided in the equipment room 25, and the blower 3 is connected to the wastewater collection tank 2 and the biochemical aerobic tank 20 respectively.

[0024] In order to further optimize the above scheme, the equipment room 25 is also provided with an electrical control cabinet 24, and the electrical control cabinet 24 is circuit-connected with the blower 3, the dosing device, the wastewater lifting pump 4, the pool lifting pump 15 and the wastewater transfer pump 23. Through the intelligent management of the electrical control cabinet 24, the entire system runs stably and reliably and is easy to operate and maintain.

[0025] In order to further optimize the above solution, a Fenton reaction agitator 12 is provided in the Fenton reaction tank 5 .

[0026] In order to further optimize the above solution, a hydrolysis agitator 17 is provided in the hydrolysis acidification tank 16 .

[0027] In order to further optimize the above solution, an anoxic agitator 19 is provided in the biochemical anoxic pool 18 .

[0028] In order to further optimize the above solution, an MBR membrane group 22 is provided in the MBR membrane pool 21 .

[0029] The present application uses a wastewater transfer pump 23 to transfer the wastewater to each stage for reciprocating treatment according to the wastewater concentration, and performs a reciprocating multi-stage transportation treatment process on the wastewater, which can cope with high-concentration waste liquids of various concentrations.

[0030] The present application uses a variety of dosing devices in the Fenton reaction tank 5 to chemically treat high-concentration waste liquid, adopts a biodegradation process, and utilizes the self-degradation effect of activated sludge microorganisms to convert COD, TN and NH3-N pollutants in the wastewater into harmless CO2 and N2 emissions, integrating chemical treatment and biological treatment, making the overall treatment effect more stable and more economical.

[0031] In order to further optimize the above scheme, each device of the present application adopts a modular device, which not only occupies a small space, but also is easy to install and combine, which can greatly shorten the on-site installation time, thereby reducing time costs.

[0032] Working principle: High-concentration waste liquid enters the wastewater collection tank 2 through the water inlet 1, and is aerated and stirred by the blower 3 in the wastewater collection tank 2 to mix the waste liquid, and then the waste water is lifted to the Fenton reaction tank 5 by the wastewater lifting pump 4. Various dosing devices (PAC dosing device 6, PAM dosing device 7, ferrous sulfate dosing device 8, sulfuric acid dosing device 9, liquid alkali dosing device 10, hydrogen peroxide dosing device 11) are used to dosing in the Fenton reaction tank 5 according to the concentration of each pollutant in the waste liquid. At the same time, the Fenton reaction agitator 12 is turned on for sufficient stirring reaction. After the reaction is complete, the Fenton reaction agitator 12 is turned off, and the waste water is statically layered in the Fenton reaction tank 5. After layering, the bottom sediment is discharged and disposed of through the sludge discharge port 13, and the layered supernatant flows to the intermediate water tank 14 through the pipeline, and then passes through The pool lifting pump 15 lifts the wastewater to the hydrolysis acidification pool 16, and at the same time, the wastewater is fully mixed with the anaerobic bacteria by the normally open hydrolysis agitator 17, and then the wastewater flows into the biochemical anoxic pool 18 by gravity. At the same time, the wastewater is fully mixed with the anoxic bacteria by the normally open anoxic agitator 19, and then the wastewater flows into the biochemical aerobic pool 20 by gravity. The blower 3 is used for aeration and oxygenation to ensure the normal growth of aerobic bacteria in the biochemical aerobic pool 20, and at the same time, various pollutants in the wastewater are degraded. Then, the wastewater flows into the MBR membrane pool 21 by gravity, and the water is filtered through the MBR membrane group 22 and discharged. If the water quality meets the standard at this time, it is discharged. If the water quality does not meet the standard, it can be transported to each stage for reciprocating treatment (Fenton reaction pool 5, hydrolysis acidification pool 16, biochemical anoxic pool 18, biochemical aerobic pool 20) according to the wastewater concentration through the wastewater transfer pump 23.

[0033] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wastewater treatment device that uses a reciprocating multi-stage degradation of high-concentration waste liquid, characterized in that: The invention comprises an equipment room (25), a water inlet (1), a wastewater collection tank (2), a Fenton reaction tank (5), a sludge discharge port (13), an intermediate water tank (14), a hydrolysis acidification tank (16), a biochemical anoxic tank (18), a biochemical aerobic tank (20) and an MBR membrane tank (21). The equipment room (25) is provided with a dosing device, a wastewater lifting pump (4), a water tank lifting pump (15) and a wastewater transfer pump (23). The wastewater collection tank (2) is provided with a water inlet (1). The wastewater collection tank (2) is connected to the Fenton reaction tank (5) through the wastewater lifting pump (4). The Fenton reaction tank (5) is provided with a sludge discharge port (13). The Fenton reaction pool (5) is connected to the dosing device, the Fenton reaction pool (5) is connected to the intermediate water pool (14), the intermediate water pool (14) is connected to the hydrolysis acidification pool (16) through the water pool lifting pump (15), the hydrolysis acidification pool (16) is connected to the biochemical anoxic pool (18), the biochemical anoxic pool (18) is connected to the biochemical aerobic pool (20), the biochemical aerobic pool (20) is connected to the MBR membrane pool (21), and the MBR membrane pool (21) is respectively connected to the Fenton reaction pool (5), the hydrolysis acidification pool (16), the biochemical anoxic pool (18) and the biochemical aerobic pool (20) through the wastewater transfer pump (23).

2. A wastewater treatment device for degrading high-concentration waste liquid by reciprocating multi-stage according to claim 1, characterized in that: The dosing device comprises a PAC dosing device (6), a PAM dosing device (7), a ferrous sulfate dosing device (8), a sulfuric acid dosing device (9), a liquid alkali dosing device (10) and a hydrogen peroxide dosing device (11); the PAC dosing device (6), the PAM dosing device (7), the ferrous sulfate dosing device (8), the sulfuric acid dosing device (9), the liquid alkali dosing device (10) and the hydrogen peroxide dosing device (11) are respectively connected to the Fenton reaction pool (5).

3. The wastewater treatment device according to claim 1 that uses a reciprocating multi-stage degradation of high-concentration waste liquid is characterized in that: A blower (3) is provided in the equipment room (25), and the blower (3) is respectively connected to the wastewater collection pool (2) and the biochemical aerobic pool (20).

4. A wastewater treatment device for degrading high-concentration waste liquid by reciprocating multi-stage according to claim 1, characterized in that: The equipment room (25) is also provided with an electrical control cabinet (24), and the electrical control cabinet (24) is connected to the blower (3), the dosing device, the wastewater lifting pump (4), the pool lifting pump (15) and the wastewater transfer pump (23) by circuit.

5. The wastewater treatment device according to claim 1 that uses a reciprocating multi-stage method to degrade high-concentration waste liquid is characterized in that: A Fenton reaction agitator (12) is provided in the Fenton reaction tank (5).

6. The wastewater treatment device for degrading high-concentration waste liquid by reciprocating multi-stage according to claim 1, characterized in that: A hydrolysis stirrer (17) is provided in the hydrolysis acidification tank (16).

7. The wastewater treatment device for degrading high-concentration waste liquid by reciprocating multi-stage according to claim 1, characterized in that: An anoxic stirrer (19) is provided in the biochemical anoxic pool (18).

8. The wastewater treatment device according to claim 1 that uses a reciprocating multi-stage method to degrade high-concentration wastewater, characterized in that: An MBR membrane group (22) is arranged in the MBR membrane pool (21).

Images