A pre-aeration detoxification device

Abstract

The utility model discloses a pre-aeration detoxification device, which belongs to the field of highly difficult chemical wastewater treatment engineering. The pre-aeration detoxification device comprises a treatment box and a partition integrally formed on the inner side of the treatment box, wherein a pre-aeration detoxification chamber and a sedimentation and mud discharge chamber are respectively arranged on both sides of the partition, wherein the pre-aeration detoxification chamber is provided with a pre-aeration detoxification device for aeration and detoxification, and the sedimentation and mud discharge chamber is provided with a matching sedimentation and mud discharge device for sedimentation and mud discharge, which can realize a significant reduction in various pollutant indicators, and the toxicity of wastewater pollution is also significantly reduced accordingly, which greatly reduces the load of subsequent anaerobic and aerobic biochemical treatment units, thereby improving the sewage treatment efficiency, and ensuring the standard discharge of sewage treatment, and at the same time, the treatment method of front-end sludge discharge is more flexible and variable than the terminal treatment, and the operation is simple and the treatment efficiency is higher.

Description

Technical Field

[0001] The utility model relates to the field of highly difficult chemical wastewater treatment projects, and more specifically, to a pre-aeration detoxification device. Background Art

[0002] Chemical wastewater is a recognized industrial wastewater that is difficult to treat. It is a high-concentration, difficult-to-degrade organic wastewater with complex ingredients, high organic matter concentration, high salt content, strong toxicity and inhibition, high chroma and turbidity, and large changes in water quality and quantity. The acid, alkali, salt, solvent, organic compound, heavy metal ion and other components contained in the wastewater pose a great challenge to wastewater treatment. At the same time, they are far beyond the tolerance range of biochemical active bacteria, and can even inhibit the growth and metabolism of microorganisms in the biological treatment system, thereby reducing the efficiency of biochemical treatment.

[0003] Pesticide production wastewater is a typical branch of high-difficulty chemical wastewater, and there are many problems in the treatment process. The main pollutants in pesticide wastewater are organic matter such as alcohols, toluene, xylene, ketones, chloroform, dichloroethane and triethylamine, and inorganic matter such as salt, ammonia nitrogen and phosphorus, which have a serious inhibitory effect on biochemical bacteria. It has the characteristics of high organic matter concentration, poor biodegradability, deep color, bad smell, toxicity and harm.

[0004] At present, the main processes for pesticide wastewater treatment are: pretreatment + anaerobic + aerobic + deep treatment. Pretreatment generally uses micro-electrolysis + Fenton, electrocatalytic oxidation and other processes, and the equipment investment and operating costs are high. Due to the toxicity of the wastewater itself, the volume load of anaerobic and aerobic processes is low, and the construction cost is relatively high. Deep treatment generally uses micro-electrolysis + Fenton, ozone catalytic oxidation, activated carbon filtration devices, etc., which have high operating costs and will also produce a large amount of hazardous waste, causing secondary pollution.

[0005] In summary, the treatment process of pesticide wastewater, which is a difficult-to-treat chemical wastewater, is relatively complicated, with high construction investment and operating costs. Due to its toxic mechanism of inhibiting biological growth, the commissioning and operation cycle is long, and it is difficult to deliver the project in compliance with standards. Therefore, we proposed a pre-aeration detoxification device to solve the above problems. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the problems existing in the prior art, the purpose of the utility model is to provide a pre-aeration detoxification device, which can achieve a significant reduction in various pollutant indicators, and the toxicity of wastewater pollution is also greatly reduced, greatly reducing the load of subsequent anaerobic and aerobic biochemical treatment units, thereby improving the sewage treatment efficiency and ensuring that the sewage treatment meets the discharge standards. At the same time, the treatment method of front-end sludge discharge is more flexible and variable than the terminal treatment, the operation is simple, and the treatment efficiency is higher.

[0008] 2. Technical solution

[0009] To solve the above problems, the utility model adopts the following technical solutions.

[0010] A pre-aeration and detoxification device comprises a treatment box and a partition integrally formed inside the treatment box, wherein a pre-aeration and detoxification chamber and a sedimentation and mud discharge chamber are respectively arranged on both sides of the partition;

[0011] The pre-aeration and detoxification chamber is provided with a pre-aeration and detoxification device for aeration and detoxification;

[0012] The pre-aeration and detoxification device comprises a liftable microporous aeration pipe installed inside the pre-aeration and detoxification chamber, an aeration branch pipe connected to the liftable microporous aeration pipe, an aeration fan installed outside the treatment box, and an aeration main pipe connected to the air outlet of the aeration fan and connected to the aeration branch pipe;

[0013] The sedimentation and mud discharge chamber is provided with a matching sedimentation and mud discharge device for sedimentation and mud discharge;

[0014] The matching sedimentation and mud discharge device includes a central guide tube installed on the inner side of the sedimentation and mud discharge chamber, a mud hopper installed at the bottom of the sedimentation and mud discharge chamber, an overflow weir fixedly connected to the inner wall of the sedimentation and mud discharge chamber and extending to the outside of the treatment box, an outlet trough arranged on the inner side of the overflow weir, a gravity pipe installed between the pre-aeration and detoxification chamber and the sedimentation and mud discharge chamber and conductively connected to the central guide tube, a mud discharge pipe installed at the mud hopper and extending to the outside of the treatment box, and a mud discharge pump installed on the outside of the treatment box and the input end of which is conductively connected to the mud discharge pipe.

[0015] Furthermore, the pre-aeration and detoxification chamber is filled with chemical wastewater, and biological bacteria are arranged in the chemical wastewater.

[0016] Furthermore, sludge is deposited in the mud hopper.

[0017] Furthermore, the gravity pipe is arranged in an L-shaped structure, and the top of the gravity pipe is flush with the liquid surface of the chemical wastewater.

[0018] Furthermore, one end of the mud discharge pipe away from the mud discharge pump extends to the root of the mud bucket.

[0019] Furthermore, a plurality of the liftable microporous aeration pipes and the aeration branch pipes are equidistantly arranged.

[0020] Furthermore, a water inlet which is in conduction connection with the front aeration and detoxification chamber is arranged at the front end of the treatment box away from the mud pump.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) This scheme sets up high aeration equipment, and the aeration device adopts a liftable microporous aeration tube, which is convenient for water operation and maintenance. The dissolved oxygen in the wastewater is controlled at about 3 mg / L, which can effectively convert volatile substances such as chloroform, dichloroethane and triethylamine contained in the wastewater into gas phase and enter the RTO treatment system, reducing the pollution of the wastewater caused by such substances, that is, reducing the biological toxicity of the wastewater, achieving the detoxification function, and thus reducing the difficulty of wastewater treatment and the load of subsequent biochemical treatment.

[0024] (2) This scheme replaces the remaining sludge that has been trained in the back-end aerobic system with the front-end aeration and detoxification device. The adaptability of the biological strains is higher, which greatly shortens the commissioning and operation time and effectively realizes the reuse of biologically active strains. While pre-degrading the pollutants in the wastewater, the back-end sludge discharge method is changed to the front-end sludge discharge, which further adsorbs the pollutants before discharging them from the wastewater treatment system, thus realizing multiple cumulative adsorption and discharge of pollutants and fully and effectively utilizing the biologically active sludge.

[0025] (3) In this scheme, after the wastewater undergoes high-exposure reaction in this device, its toxicity is reduced and its biodegradability is improved, thereby improving the treatment capacity of the subsequent biochemical system and greatly reducing the impact coefficient of the unstable water quality and quantity of pesticide wastewater, thereby ensuring the treatment effect.

[0026] (4) In this scheme, the hydraulic retention time of wastewater is 6 to 8 hours and the sludge concentration is 3 to 5 mg / L. This not only ensures the efficiency of sludge degradation, but also reduces the increase in investment costs caused by too long hydraulic retention time, and has certain economic feasibility.

[0027] (5) This scheme is equipped with a sedimentation and sludge discharge device. The sludge of the entire sewage treatment system is discharged from the sedimentation and sludge discharge device equipped with the pre-aeration and detoxification device. It can replace the sludge treatment system at the end of the biochemical process, reuse the biologically active bacteria, and save the equipment investment cost of the sewage treatment system.

[0028] (6) This solution has a simple and controllable treatment process, low operating cost, strong practicality, and is easy to promote. The device structure can be flexible and changeable according to the characteristics of the specific project. It can be an integrated device or a steel-concrete structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0030] Figure 2 It is a structural schematic diagram of the utility model from another perspective;

[0031] Figure 3 It is a side view schematic diagram of the utility model;

[0032] Figure 4 It is a schematic cross-sectional view of the AA part of the utility model.

[0033] Description of the numbers in the figure:

[0034] 1. Treatment box; 2. Partition; 3. Liftable microporous aeration tube; 4. Aeration branch pipe; 5. Aeration main pipe; 6. Aeration fan; 7. Central guide tube; 8. Mud bucket; 9. Sludge; 10. Gravity pipe; 11. Overflow weir; 12. Water outlet trough; 13. Mud discharge pipe; 14. Mud discharge pump; 15. Water inlet. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0036] Example:

[0037] See also Figure 1-4 A pre-aeration and detoxification device comprises a treatment box 1 and a partition 2 integrally formed inside the treatment box 1, and a pre-aeration and detoxification chamber and a sedimentation and mud discharge chamber are respectively arranged on both sides of the partition 2;

[0038] The pre-aeration and detoxification chamber is provided with a pre-aeration and detoxification device for aeration and detoxification;

[0039] The pre-aeration and detoxification device comprises a liftable microporous aeration pipe 3 installed inside the pre-aeration and detoxification chamber, an aeration branch pipe 4 connected to the liftable microporous aeration pipe 3, an aeration fan 6 installed outside the treatment box 1, and an aeration main pipe 5 connected to the air outlet end of the aeration fan 6 and connected to the aeration branch pipe 4;

[0040] The sedimentation and mud discharge chamber is provided with a matching sedimentation and mud discharge device for sedimentation and mud discharge;

[0041] The supporting sedimentation and mud discharge device includes a central guide tube 7 installed inside the sedimentation and mud discharge chamber, a mud bucket 8 installed at the bottom of the sedimentation and mud discharge chamber, an overflow weir 11 fixedly connected to the inner wall of the sedimentation and mud discharge chamber and extending to the outside of the treatment box 1, a water outlet trough 12 arranged inside the overflow weir 11, a gravity pipe 10 installed between the front aeration and detoxification chamber and the sedimentation and mud discharge chamber and connected to the central guide tube 7, a mud discharge pipe 13 installed at the mud bucket 8 and extending to the outside of the treatment box 1, and a mud discharge pump 14 installed outside the treatment box 1 and the input end of which is connected to the mud discharge pipe 13;

[0042] It should be noted that after the industrial wastewater enters the inner side of the pre-aeration detoxification chamber, a high-aeration device is set. The pre-aeration detoxification device adopts a liftable microporous aeration pipe 3. The aeration fan 6 cooperates with the aeration main pipe 5 and the aeration branch pipe 4 to make the liftable microporous aeration pipe 3 aerate the industrial wastewater. The liftable microporous aeration pipe 3 is convenient for water-carrying operation and maintenance. The dissolved oxygen in the wastewater is controlled at about 3 mg / L, which can effectively convert volatile substances such as chloroform, dichloroethane and triethylamine contained in the wastewater into a gas phase state and enter the RTO treatment system, thereby reducing the pollution of the wastewater caused by such substances, that is, reducing the biological toxicity of the wastewater, realizing the detoxification function, and thus reducing the difficulty of wastewater treatment and the load of subsequent biochemical treatment;

[0043] The aerated tumbling sludge 9 is passed into the central guide tube 7 through the gravity pipe 10 provided with the supporting sedimentation and sludge discharge device and then discharged into the sedimentation and sludge discharge chamber. The sludge 9 is gathered in the sludge bucket 8 and discharged through the sludge discharge pipe 13 by opening the sludge discharge pump 14, and the supernatant is discharged from the treatment box 1 through the water outlet trough 12 provided at the overflow weir 11;

[0044] The residual sludge 9 that has been trained in the rear-end aerobic system is replaced in the front-end aeration and detoxification device. The adaptability of the biological strains is higher, which greatly shortens the debugging and operation time, effectively realizes the reuse of the biologically active strains, and pre-degrades the pollutants in the wastewater. At the same time, the rear-end sludge discharge method is changed to the front-end sludge discharge, and the pollutants are further adsorbed before being discharged from the wastewater treatment system, realizing multiple cumulative adsorption and discharge of pollutants, and fully and effectively utilizing the biologically active sludge 9;

[0045] After the wastewater undergoes high-exposure reaction in this device, its toxicity is reduced and its biodegradability is improved, thereby improving the treatment capacity of the subsequent biochemical system, greatly reducing the impact coefficient of pesticide wastewater due to its unstable water quality and quantity, and ensuring the treatment effect;

[0046] The hydraulic retention time of wastewater is 6-8h, and the sludge 9 concentration is 3-5mg / L, which not only ensures the efficiency of sludge 9 degradation, but also reduces the increase in investment cost caused by too long hydraulic retention time, and has certain economic feasibility;

[0047] Equipped with sedimentation and sludge discharge device, the sludge 9 of the entire sewage treatment system is discharged from the sedimentation and sludge discharge device equipped with the pre-aeration and detoxification device, which can replace the sludge 9 treatment system at the end of the biochemical process, reuse the biologically active bacteria, and save the equipment investment cost of the sewage treatment system;

[0048] The treatment process is simple and controllable, with low operating costs, strong practicality and easy promotion;

[0049] In the actual engineering case involved in this case, the water quality of the pre-aeration detoxification device is: COD Cr 25000mg / L, triethylamine 2650mg / L, chloroform 50mg / L, ammonia nitrogen 25mg / L. After being treated by the pre-aeration detoxification device, the effluent from the matching sedimentation and sludge discharge device: COD Cr is 17500mg / L, triethylamine is 265mg / L, chloroform is 10mg / L, ammonia nitrogen is 3mg / L, COD Cr The removal rate is ≥30%, the removal rate of triethylamine is ≥90%, the removal rate of chloroform is ≥80%, and the removal rate of ammonia nitrogen is ≥88%. The indicators of various pollutants are greatly reduced, and the toxicity of wastewater pollution is also greatly reduced, which greatly reduces the load of subsequent anaerobic and aerobic biochemical treatment units, thereby improving the efficiency of sewage treatment and ensuring that the sewage treatment meets the discharge standards. At the same time, the treatment method of front-end sludge 9 discharge is more flexible and variable than the terminal treatment, with simple operation and higher treatment efficiency.

[0050] like Figure 4 As shown, the pre-aeration and detoxification chamber is filled with chemical wastewater, and biological bacteria are arranged in the chemical wastewater;

[0051] It should be noted that it is beneficial to decompose harmful substances in industrial wastewater and achieve detoxification function.

[0052] like Figure 4 As shown, sludge 9 is deposited in the mud bucket 8, and the end of the mud discharge pipe 13 away from the mud discharge pump 14 extends to the root of the mud bucket 8;

[0053] It should be noted that this is beneficial to discharge all the accumulated sludge 9.

[0054] like Figure 4 As shown, the gravity pipe 10 is arranged in an L-shaped structure, and the top of the gravity pipe 10 is flush with the liquid surface of the chemical wastewater;

[0055] It should be noted that the aerated tumbling sludge 9 is passed into the central guide tube 7 through the gravity pipe 10 provided in the matching sedimentation and sludge discharge device and then discharged into the sedimentation and sludge discharge chamber.

[0056] like Figure 4 As shown, multiple liftable microporous aeration pipes 3 and aeration branch pipes 4 are evenly spaced;

[0057] It should be noted that the effect of aeration of industrial wastewater is improved.

[0058] like Figure 1 , Figure 3 As shown, a water inlet 15 which is in conduction connection with the front aeration and detoxification chamber is arranged at the front end of the treatment box 1 away from the mud pump 14 .

[0059] When in use: after the industrial wastewater enters the inner side of the pre-aeration and detoxification chamber, a high-aeration device is set. The pre-aeration and detoxification device adopts a liftable microporous aeration tube 3. The aeration fan 6 cooperates with the aeration main pipe 5 and the aeration branch pipe 4 to make the liftable microporous aeration tube 3 aerate the industrial wastewater. The liftable microporous aeration tube 3 is convenient for water-carrying operation and maintenance. The dissolved oxygen in the wastewater is controlled at about 3 mg / L, which can effectively convert volatile substances such as chloroform, dichloroethane and triethylamine contained in the wastewater into a gas phase state and enter the RTO treatment system, thereby reducing the pollution of the wastewater caused by such substances, that is, reducing the biological toxicity of the wastewater, realizing the detoxification function, and thus reducing the difficulty of wastewater treatment and the load of subsequent biochemical treatment;

[0060] The aerated and tumbling sludge 9 is passed into the central guide tube 7 through the gravity pipe 10 provided in the matching sedimentation and sludge discharge device and then discharged into the sedimentation and sludge discharge chamber. The sludge 9 is gathered in the mud hopper 8 and discharged through the mud discharge pipe 13 by opening the mud discharge pump 14, and the supernatant is discharged from the treatment box 1 through the water outlet trough 12 provided at the overflow weir 11.

[0061] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A pre-aeration detoxification device, comprising a treatment box (1) and a partition (2) integrally formed inside the treatment box (1), characterized in that: The two sides of the partition (2) are respectively provided with a front aeration and detoxification chamber and a sedimentation and mud discharge chamber; The pre-aeration and detoxification chamber is provided with a pre-aeration and detoxification device for aeration and detoxification; The pre-aeration and detoxification device comprises a liftable microporous aeration pipe (3) installed inside the pre-aeration and detoxification chamber, an aeration branch pipe (4) conductively connected to the liftable microporous aeration pipe (3), an aeration fan (6) installed outside the treatment box (1), and an aeration main pipe (5) connected to the air outlet end of the aeration fan (6) and conductively connected to the aeration branch pipe (4); The sedimentation and mud discharge chamber is provided with a matching sedimentation and mud discharge device for sedimentation and mud discharge; The matching sedimentation and mud discharge device comprises a central guide tube (7) installed inside the sedimentation and mud discharge chamber, a mud bucket (8) installed at the bottom of the sedimentation and mud discharge chamber, an overflow weir (11) fixedly connected to the inner wall of the sedimentation and mud discharge chamber and extending to the outside of the treatment box (1), a water outlet trough (12) arranged inside the overflow weir (11), a gravity pipe (10) installed between the pre-aeration and detoxification chamber and the sedimentation and mud discharge chamber and connected to the central guide tube (7), a mud discharge pipe (13) installed at the mud bucket (8) and extending to the outside of the treatment box (1), and a mud discharge pump (14) installed outside the treatment box (1) and having an input end connected to the mud discharge pipe (13).

2. A pre-aeration detoxification device according to claim 1, characterized in that: The pre-aeration and detoxification chamber is filled with chemical wastewater, and biological bacteria are arranged in the chemical wastewater.

3. A pre-aeration detoxification device according to claim 1, characterized in that: Sludge (9) is deposited in the mud hopper (8).

4. A pre-aeration detoxification device according to claim 2, characterized in that: The gravity pipe (10) is arranged in an L-shaped structure, and the top of the gravity pipe (10) is flush with the liquid surface of the chemical wastewater.

5. A pre-aeration detoxification device according to claim 1, characterized in that: One end of the mud discharge pipe (13) away from the mud discharge pump (14) extends to the root of the mud bucket (8).

6. A pre-aeration detoxification device according to claim 1, characterized in that: A plurality of the liftable microporous aeration pipes (3) and the aeration branch pipes (4) are arranged at equal distances.

7. A pre-aeration detoxification device according to claim 1, characterized in that: The front end of the treatment box (1) away from the mud pump (14) is provided with a water inlet (15) which is conductively connected to the front aeration and detoxification chamber.

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