Advanced treatment device for biochemical tail water of distilled ammonia wastewater

Abstract

The utility model relates to the technical field of ammonia distillation wastewater treatment, and discloses an advanced treatment device for biochemical tail water of ammonia distillation wastewater, which comprises a high-density sedimentation tank, a water inlet pipe is mounted at the front end of the high-density sedimentation tank, and a pollution discharge mechanism is mounted at the bottom of the high-density sedimentation tank. A multi-element catalysis mechanism is mounted at the rear part of the high-density sedimentation tank, three reaction areas and a sedimentation area are arranged in the high-density sedimentation tank, a first feeding pipe and a second feeding pipe are respectively mounted at the tops of two of the reaction areas in a penetrating manner, and the sewage discharging mechanism comprises a sewage discharging pipe. Through the reaction zone, the blow-off pipe and the filter cartridge, the removal rate of suspended solids in tail water is increased from 20% to 80% or above, large sludge can be filtered again, and the sludge with more moisture is conveyed into the reaction zone through the return pipe; by means of the multi-element catalysis mechanism, the original COD removal rate can be increased to 50% from 10%, organic pollutants in wastewater can be oxidized and decomposed, and therefore the oxidation capacity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ammonia wastewater treatment technical field, concretely is a kind of ammonia wastewater biochemical tail water advanced treatment device. BACKGROUND

[0002] Ammonia wastewater biochemical tail water treatment technology is mainly removed to suspended solids by V-type filter, enters air floatation coagulation sedimentation tank by aeration and PAC, PAM are added to carry out flocculation to the turbidity and part COD in sewage and carry out sedimentation removal. The effluent turbidity is about 30NTU, and the effluent COD is about 200mg / L, which does not reach the water quality requirement (COD≤60mg / L, turbidity≤5NTU) of entering membrane system treatment.

[0003] The utility model discloses an ammonia wastewater treatment system, which comprises an oil-water separation tank, a tubular membrane filter unit, a degassing membrane unit and an ammonia gas recovery device.

[0004] The above-mentioned wastewater treatment system realizes the effect of oil removal and ammonia removal, and ensures that the effluent meets the requirements of the biochemical system, but when settling and discharging sewage, the effluent turbidity and COD index do not meet the process index requirements, and a large amount of water is easily carried when discharging bulk sludge, and the removal rate of organic pollutants in wastewater is low, and the addition of inorganic salt flocculants makes the salt content in water high. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of ammonia wastewater biochemical tail water advanced treatment device to solve the technical problem in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A kind of ammonia wastewater biochemical tail water advanced treatment device, including high-density sedimentation tank, the front end of the high-density sedimentation tank is equipped with water inlet pipe, the bottom of the high-density sedimentation tank is equipped with sewage discharge mechanism, the rear portion of the high-density sedimentation tank is equipped with multi-element catalytic mechanism, the inside of the high-density sedimentation tank is provided with three reaction zones and a sedimentation zone, the top of two of the reaction zones is respectively equipped with first feeding pipe and second feeding pipe, the sewage discharge mechanism includes sewage discharge pipe, the sewage discharge pipe is installed at the bottom of sedimentation zone, the inside of the sewage discharge pipe is equipped with filter cartridge, the rear end of the sewage discharge pipe is equipped with motor, the output shaft of the motor and located in sewage discharge pipe and filter cartridge are equipped with same screw rod, the outside of the rear end of the sewage discharge pipe is equipped with sludge pipe, the front end of the sewage discharge pipe is equipped with discharge pump, the outlet of the discharge pump is equipped with return pipe between the front end reaction zone.

[0008] Preferably, the inside of three reaction zones is provided with stirring paddle, and the inside bottom end of sedimentation zone is provided with scraping plate.

[0009] Preferably, the diameter of the filter cartridge is smaller than the inner diameter of the blowdown pipe, and the rear end of the filter cartridge is fixed to the inner wall of the blowdown pipe.

[0010] Preferably, a valve is arranged between the sludge pipe and the blowdown pipe, and the front end of the reaction zone is communicated with the backflow pipe.

[0011] Preferably, the multi-element catalytic mechanism comprises a hydrogen peroxide reactor, a microwave reactor and an ozone catalytic oxidation system, the hydrogen peroxide reactor is arranged at the rear part of the high-density sedimentation tank, a third feeding pipe is arranged at the top of the hydrogen peroxide reactor, an ozone feeding pipe is arranged at the bottom of the rear part of the ozone catalytic oxidation system, and a drain pipe is arranged at the top of the rear part of the ozone catalytic oxidation system.

[0012] Preferably, the hydrogen peroxide reactor, the microwave reactor and the ozone catalytic oxidation system are communicated with each other.

[0013] Preferably, the top end of the third feeding pipe is used for connecting a hydrogen peroxide pipe, and the rear end of the ozone feeding pipe is used for connecting an ozone pipe.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1) The tail water treatment device, through setting up blowdown mechanism, reaction zone adds activated carbon solution and flocculant respectively, the removal rate of suspended solids in tail water is increased from 20% to more than 80%, sludge settlement enters blowdown pipe, passes through filter cartridge, can carry out secondary filtration to large sludge, and the sludge with more moisture is transported to reaction zone through backflow pipe, and the sludge is transported to sludge pipe through spiral rod, facilitating sludge discharge.

[0016] 2) The tail water treatment device, through setting up multi-element catalytic mechanism, changes the aeration coagulation sedimentation tank into multi-element catalysis, and can increase the original COD removal rate from 10% to 50%, hydrogen peroxide is added to the hydrogen peroxide reactor, can oxidize and decompose organic pollutants in wastewater, through microwave reactor, it is more easy to be oxidized respectively, through ozone catalytic oxidation system, promotes the decomposition of ozone, produces more hydroxyl radicals, thereby improving the oxidation capacity. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an overall structure schematic view of the ammonia evaporation wastewater biochemical tail water advanced treatment device of the utility model embodiment.

[0018] Figure 2 It is an internal structure schematic view of the blowdown mechanism in the utility model embodiment.

[0019] Figure 3 It is an internal structure schematic view of the blowdown pipe in the utility model embodiment.

[0020] Figure 4 It is the structure schematic view of the multi-element catalysis mechanism in the embodiment of the utility model.

[0021] Figure 5 It is the internal side view of the whole.

[0022] In the drawing: 1, high-density sedimentation tank; 2, water inlet pipe; 3, pollution discharge mechanism; 4, multi-element catalysis mechanism; 5, reaction zone; 6, sedimentation zone; 7, first feeding pipe; 8, second feeding pipe; 9, pollution discharge pipe; 10, filter cartridge; 11, screw rod; 12, motor; 13, sludge pipe; 14, discharge pump; 15, reflux pipe; 16, hydrogen peroxide reactor; 17, microwave reactor; 18, ozone catalytic oxidation system; 19, third feeding pipe; 20, ozone dosing pipe; 21, drain pipe. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] Embodiment one

[0025] Combined Figures 1-5 , a kind of ammonia wastewater biochemical tail water advanced treatment device, including high-density sedimentation tank 1, the front end of high-density sedimentation tank 1 is equipped with water inlet pipe 2, the bottom of high-density sedimentation tank 1 is equipped with pollution discharge mechanism 3, the rear portion of high-density sedimentation tank 1 is equipped with multi-element catalysis mechanism 4.

[0026] Referring to Figure 2 And Figure 3 Further, the inside of high-density sedimentation tank 1 is provided with three reaction zones 5 and a sedimentation zone 6, the top of two reaction zones 5 is respectively equipped with first feeding pipe 7 and second feeding pipe 8, pollution discharge mechanism 3 includes pollution discharge pipe 9, pollution discharge pipe 9 is installed at the bottom of sedimentation zone 6, filter cartridge 10 is installed in the inside of pollution discharge pipe 9, motor 12 is installed at the rear end of pollution discharge pipe 9, the output shaft of motor 12 and located in pollution discharge pipe 9 and filter cartridge 10 are equipped with same screw rod 11, sludge pipe 13 is installed at the rear end of the outside of pollution discharge pipe 9, discharge pump 14 is installed at the front end of pollution discharge pipe 9, reflux pipe 15 is installed between the water outlet of discharge pump 14 and the reaction zone 5 located at the front end.

[0027] The inside of the three reaction zones 5 is provided with stirring paddles, and the inside bottom end of the precipitation zone 6 is provided with a scraping plate. The inside of the three reaction zones 5 is connected to the first feeding pipe 7 and the second feeding pipe 8 for adding activated carbon solution and flocculants respectively.

[0028] The diameter of the filter cartridge 10 is smaller than the internal diameter of the blowdown pipe 9, and the rear end of the filter cartridge 10 is fixed to the inner wall of the blowdown pipe 9. The filter cartridge 10 is used to intercept and filter sludge. The sludge is transported to the sludge pipe 13 by the screw rod 11 for discharge.

[0029] A valve is installed between the sludge pipe 13 and the blowdown pipe 9, and the front end reaction zone 5 is connected to the backflow pipe 15. The backflow pipe 15 transports sludge with more water to the reaction zone 5.

[0030] Specifically, activated carbon solution is added to the front end reaction zone 5 to adsorb organic matter and suspended matter in water. Flocculants are added to the middle reaction zone 5 to promote the coagulation and sedimentation of suspended matter. The sludge is filtered by the filter cartridge 10 and transported by the screw rod 11 for discharge. The sludge with more water is transported back to the reaction zone 5.

[0031] Example Two

[0032] Reference Figure 4 On the basis of Example One, it is further obtained that the multi-element catalytic mechanism 4 includes a hydrogen peroxide reactor 16, a microwave reactor 17, and an ozone catalytic oxidation system 18. The hydrogen peroxide reactor 16 is installed at the rear of the high-density sedimentation tank 1. The top of the hydrogen peroxide reactor 16 is provided with a third feeding pipe 19. The rear end of the ozone catalytic oxidation system 18 is provided with an ozone feeding pipe 20. The rear end of the ozone catalytic oxidation system 18 is provided with a drain pipe 21.

[0033] The inside of the hydrogen peroxide reactor 16, the microwave reactor 17, and the ozone catalytic oxidation system 18 is connected. The sewage is subjected to multi-element catalytic oxidation in the hydrogen peroxide reactor 16, the microwave reactor 17, and the ozone catalytic oxidation system 18 to degrade organic pollutants and certain inorganic pollutants in the wastewater.

[0034] The top end of the third feeding pipe 19 is used to connect a hydrogen peroxide pipe. The rear end of the ozone feeding pipe 20 is used to connect an ozone pipe. The third feeding pipe 19 is used to add hydrogen peroxide. The ozone feeding pipe 20 is used to add ozone.

[0035] Specifically, the hydrogen peroxide in the hydrogen peroxide reactor 16 is used to oxidize and decompose organic pollutants in the wastewater. The microwave reactor 17 uses microwave energy to treat the wastewater, making it more susceptible to oxidation and decomposition. The ozone catalytic oxidation system 18 uses ozone in combination with a catalyst to improve oxidation capacity.

[0036] In actual operation process, sewage enters high density sedimentation tank 1 through inlet pipe 2, passes through three reaction zones 5 respectively, adds activated carbon solution in the reaction zone 5 at the front end through first feeding pipe 7, adsorbs organic matter and suspended matter in water, adds flocculant in the reaction zone 5 in the middle through second feeding pipe 8, and small flocs in water are gathered with each other under the help of flocculant to form larger flocs, so that the flocs are settled conveniently, and stirring is carried out through the stirring paddle in the three reaction zones 5.

[0037] When sedimentation and pollution are carried out, sewage enters sedimentation zone 6 to start sedimentation, and clean water flows upwards to realize solid-liquid separation, sludge is settled in pollution pipe 9, through starting motor 12 and discharge pump 14, sludge enters filter cartridge 10 to carry out filtration again, and sludge with more water enters reaction zone 5 through reflux pipe 15 to carry out re-reaction, and large sludge is transported to sludge pipe 13 through spiral rod 11 to be discharged.

[0038] When multi-element catalytic reaction is carried out, hydrogen peroxide is added to hydrogen peroxide reactor 16 through third feeding pipe 19, hydrogen peroxide is a common oxidant, water is decomposed to produce hydroxyl radicals under the action of hydrogen peroxide, the hydroxyl radicals have strong oxidizing capacity and can oxidize and decompose organic pollutants in wastewater, water is treated through microwave reactor 17, polarization of water molecules and other substances is caused by microwave, internal friction of molecules is caused to generate heat, so that chemical reaction is accelerated, and the water is more easily oxidized and decomposed, ozone is added from ozone catalytic oxidation system 18 through third feeding pipe 19, the combination of ozone and catalyst is used, the oxidation efficiency is significantly improved, and the refractory organic pollutants in wastewater are effectively oxidized and decomposed.

[0039] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. An ammonia evaporation wastewater biochemical tail water advanced treatment device, comprising a high-density sedimentation tank (1), a water inlet pipe (2) is installed at the front end of the high-density sedimentation tank (1), characterized in that: The high-density sedimentation tank (1) is provided with a pollution discharge mechanism (3) at the bottom, and a multi-element catalysis mechanism (4) at the rear part; The high-density sedimentation tank (1) is provided with three reaction zones (5) and a sedimentation zone (6) inside, a first feeding pipe (7) and a second feeding pipe (8) are respectively arranged through the top of two reaction zones (5), the pollution discharge mechanism (3) comprises a pollution discharge pipe (9) arranged at the bottom of the sedimentation zone (6), a filter cartridge (10) is arranged inside the pollution discharge pipe (9), a motor (12) is arranged at the rear end of the pollution discharge pipe (9), a same screw rod (11) is arranged on the output shaft of the motor (12) and located inside the pollution discharge pipe (9) and the filter cartridge (10), a sludge pipe (13) is arranged at the rear end outside the pollution discharge pipe (9), a discharge pump (14) is arranged at the front end of the pollution discharge pipe (9), and a reflux pipe (15) is arranged between the water outlet of the discharge pump (14) and the reaction zone (5) at the front end.

2. The device for advanced treatment of biochemical tail water of ammonia distillation wastewater according to claim 1, characterized in that: Each of the three reaction zones (5) is provided with a stirring paddle, and the inside of the sedimentation zone (6) is provided with a scraping plate at the bottom end.

3. The device for advanced treatment of biochemical tail water of ammonia distillation wastewater according to claim 1, characterized in that: The diameter of the filter cartridge (10) is smaller than the inner diameter of the pollution discharge pipe (9), and the rear end of the filter cartridge (10) is fixed with the inner wall of the pollution discharge pipe (9).

4. The device for advanced treatment of biochemical tail water of ammonia distillation wastewater according to claim 1, characterized in that: A valve is arranged between the sludge pipe (13) and the pollution discharge pipe (9), and the reaction zone (5) at the front end and the reflux pipe (15) are communicated.

5. The device for advanced treatment of biochemical tail water of ammonia distillation wastewater according to claim 1, characterized in that: The multi-element catalysis mechanism (4) comprises a hydrogen peroxide reactor (16), a microwave reactor (17) and an ozone catalytic oxidation system (18), the hydrogen peroxide reactor (16) is arranged at the rear part of the high-density sedimentation tank (1), a third feeding pipe (19) is arranged at the top of the hydrogen peroxide reactor (16), an ozone adding pipe (20) is arranged through the rear part of the ozone catalytic oxidation system (18) and located at the bottom end, and a drain pipe (21) is arranged at the top end of the rear part of the ozone catalytic oxidation system (18).

6. The device for advanced treatment of biochemical tail water of ammonia distillation wastewater according to claim 5, characterized in that: The inside of the hydrogen peroxide reactor (16), the microwave reactor (17) and the ozone catalytic oxidation system (18) are communicated.

7. The device according to claim 5, characterized in that: The top end of the third feeding pipe (19) is used for connecting a hydrogen peroxide pipe, and the rear end of the ozone adding pipe (20) is used for connecting an ozone pipe.

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