CN114149077B - Integrated wastewater synchronous denitrification and defluorination reactor device and use method thereof - Google Patents
Integrated wastewater synchronous denitrification and defluorination reactor device and use method thereof Download PDFInfo
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- C02F1/00—Treatment of water, waste water, or sewage
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- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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Abstract
The invention discloses an integrated wastewater synchronous denitrification and defluorination reactor device and a using method thereof, and relates to the technical field of water treatment. The reactor device is divided into a water inlet area, a fluorine removal area, a denitrification area and a water outlet area from bottom to top. The water inlet area is provided with a sludge discharge pipe, a water inlet pipe and a backflow water inlet pipe, four defluorination partition plates are arranged in a cavity of the defluorination area, the lower end of the defluorination area is provided with a dosing pipe and a dosing water distributor, the upper end of the defluorination area is provided with a sludge backflow pipe, the denitrification area is sequentially provided with a shortcut nitrification area and an anaerobic ammonia oxidation area from inside to outside, the center of the water outlet area is provided with a three-phase separator and an exhaust pipe, and the side wall of the water outlet area is provided with a water outlet weir and a water outlet pipe. The invention can synchronously realize the functions of removing fluorinion, performing anaerobic ammonia oxidation and denitrification and the like of the wastewater containing fluorine and nitrogen in one reactor, overcomes the defect that a plurality of devices are arranged in the prior art due to the consideration of functional requirements, has the advantages of small occupied area, short hydraulic retention time, high treatment efficiency and the like, and has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an integrated reactor device for synchronously removing nitrogen and fluorine from wastewater and a using method thereof.
Background
With the increasing popularity of intelligent products in our lives, the electronic industry, especially integrated circuit chip processing technology, has become a popular technical field. In the production process of integrated circuits, a plurality of procedures such as silicon oxidation, photoetching, epitaxy, diffusion, lead evaporation and the like all need to adopt a physical or chemical method to remove pollutants and oxides on the surface of a silicon wafer, and a large amount of wastewater can be generated while purification is realized. At present, the treatment of the electronic wastewater, especially the wastewater containing fluorine and containing ammonia nitrogen in the electronic industry, has become one of the outstanding problems in the water treatment industry. The electronic industry wastewater containing fluorine and ammonia nitrogen has the characteristics of large water quantity, complex pollution components, high pollution degree, poor biodegradability, high content of ammonia nitrogen and fluoride and the like. At present, electronic enterprises (integrated circuit chip enterprises) do not have mature and effective treatment methods for the type of wastewater, and generally, the wastewater is simply subjected to defluorination treatment and then only discharged into municipal sewage treatment plants for centralized treatment. Aiming at the treatment process of wastewater containing fluorine and ammonia nitrogen, a stripping method, a membrane separation method, an evaporative crystallization method and the like are mainly adopted to remove ammonia nitrogen, and the processes have the defects of high energy consumption, large amount of dangerous waste residues, easy generation of secondary pollution, low treatment efficiency, high treatment cost and the like, and limit the application of the processes in production enterprises. For example, CN105384316A discloses a method for treating wastewater containing fluorine and ammonia nitrogen in the electronic industry, which adopts a chemical chlorination ammonia-removing method to remove ammonia nitrogen in wastewater, and then adds a calcium fluoride substance which can form water-insoluble with fluorine ions to achieve the effect of removing fluorine in wastewater. The chlorination ammonia removal method generally changes liquid chlorine into chlorine gas to react with ammonia nitrogen in wastewater, but redundant unreacted chlorine gas can escape into the air, so that the reaction efficiency is reduced, the cost is improved, the environment is polluted, and the adverse effect on the health of operators is caused. For example, CN106746102A discloses a treatment process of wastewater containing fluorine and ammonia nitrogen, which utilizes the difference of relative volatility of ammonia and water, adopts an ammonia-water separation technology taking high-efficiency rectification as the main technical core, combines a pretreatment technology, and adopts defluorination, decalcification, enhanced decomplexation and molecular rectification to remove fluorine and ammonia in water. The steam extraction method is adopted to remove ammonia nitrogen, the stripping efficiency has a plurality of influencing factors, the control is not easy, the required energy consumption is large, and the operating cost is high. Meanwhile, if the processes of defluorination and denitrification are carried out in different reaction devices, the method for treating the wastewater containing fluorine and nitrogen inevitably has the defects of complex process flow, large floor area for wastewater treatment, low efficiency and the like. In addition, due to the technical barriers such as low inflow C/N, the denitrification effect of the sewage treatment facility is poor, a large amount of carbon sources are required to be continuously added to improve the denitrification effect, and the high investment and high energy consumption also cause the higher operation cost of sewage treatment.
Disclosure of Invention
In order to solve the problems of complex process flow, complex operation, large occupied area of the device, incapability of synchronously realizing denitrification and defluorination treatment and the like in the prior art, the invention aims to provide an integrated wastewater synchronous denitrification and defluorination reactor device and a using method thereof.
An integrated wastewater synchronous denitrification and defluorination reactor device comprises a reactor shell, wherein the reactor device is integrally cylindrical, the lower part of the reactor device is in an inverted truncated cone shape, and a reactor chamber is sequentially divided into a water inlet area, a defluorination area, a denitrification area and a water outlet area from bottom to top; a sludge discharge pipe is arranged on one side of the bottom of the water inlet area, a water inlet pipe is arranged on the upper part of the sludge discharge pipe, and a backflow water inlet pipe is arranged on the other side of the water inlet pipe at the same height; a first defluorination partition plate, a second defluorination partition plate, a third defluorination partition plate and a fourth defluorination partition plate are sequentially arranged in a defluorination area cavity from bottom to top, a chemical feeding pipe used for adding defluorination reaction chemicals is arranged on one side of the lower portion of the first defluorination partition plate, the front end of the chemical feeding pipe is connected with a chemical feeding water distributor, a backflow water outlet pipe is arranged on one side of the upper portion of the fourth defluorination partition plate, the backflow water outlet pipe is connected with a backflow water inlet pipe of a water inlet area through a backflow pump, a vertical sludge receiving pipe is arranged in the center of the defluorination area cavity, the sludge receiving pipe penetrates through the first defluorination partition plate, the second defluorination partition plate, the third defluorination partition plate and the fourth defluorination partition plate, the horizontal height of the upper end of the sludge receiving pipe is lower than that of the backflow water outlet pipe, and the lower end of the sludge receiving pipe is connected with a sludge discharge pipe; the bottom of the denitrification area is provided with a partition plate and a guide cylinder, the guide cylinder is connected with the partition plate, the partition plate separates the defluorination area from the denitrification area, the denitrification area is sequentially provided with a shortcut nitrification area and an anaerobic ammonium oxidation area from inside to outside, and the shortcut nitrification area and the anaerobic ammonium oxidation area are separated by an inner cylinder arranged in the center of the denitrification area; the two sides of the lower part of the water outlet area are provided with guide plates, the center of the water outlet area is provided with a three-phase separator, the included angle beta between the guide plates and the side wall is 60 degrees, the upper part of the three-phase separator is connected with an exhaust pipe, the included angle gamma between the inverted bell mouth at the lower part of the three-phase separator and the horizontal plane is 60 degrees, the upper part of the water outlet area is provided with a saw-tooth water outlet weir, and one side of the lower part of the saw-tooth water outlet weir is provided with a water outlet pipe.
Preferably, the lower part of the short-cut nitrification region is provided with an air inlet pipe for aeration and an aeration system for increasing the content of dissolved oxygen, the aeration system adopts a plurality of suspended mixing aerators, the aeration system is connected with the air inlet pipe, and the air inlet pipe is connected with an air compressor.
Preferably, the first defluorination partition plate, the second defluorination partition plate, the third defluorination partition plate and the fourth defluorination partition plate in the defluorination zone are all composed of a partition plate A and a partition plate B, a larger round hole is formed in the middle of the first defluorination partition plate, a plurality of water distribution holes for water distribution are formed in the partition plate B, and no hole is formed in the partition plate A; the partition board A is horizontally arranged in the defluorination area chamber, the included angle alpha formed by the partition board A and the inner wall of the defluorination area is 60-70 degrees, and the periphery of the partition board A is slightly curled inwards; the first defluorination partition plate, the second defluorination partition plate, the third defluorination partition plate and the fourth defluorination partition plate are mutually staggered to lead the partition plates B to be arranged at 90 degrees, and the liquid in the defluorination area rises in a rotational flow manner.
Preferably, the front side, the rear side, the left side and the right side of the defluorination zone are respectively provided with a screw rod structure, each set of screw rod structure is respectively connected with two partition plates, namely, the partition plate B of the first defluorination partition plate and the partition plate A of the third defluorination partition plate share one set of screw rod structure; the partition board A of the first defluorination partition board and the partition board B of the third defluorination partition board share a set of screw rod structure; the partition board A of the second defluorination partition board and the partition board B of the fourth defluorination partition board share a set of screw rod structure; the baffle B of second defluorination baffle and the baffle A of fourth defluorination baffle share one set of lead screw structure, every set of lead screw structure all is connected with step motor, and step motor passes through PLC control, is provided with the guide rail on the casing, and the expansion end of lead screw structure is embedded into in the guide rail to remove in the guide rail, control the removal of first defluorination baffle, second defluorination baffle, third defluorination baffle and fourth defluorination baffle with this.
Preferably, the side wall of the defluorination zone is provided with a plurality of defluorination sampling ports for extracting water samples in the defluorination zone; the side wall of the denitrification area is provided with a plurality of denitrification sampling ports for extracting water samples in the denitrification area.
Preferably, a spiral groove is milled on the mud receiving pipe, the pitch-diameter ratio of the spiral groove is 0.75, the mud receiving pipe and the circular hole in the middle of the defluorination partition plate are coaxially arranged, and the diameter of the mud receiving pipe is smaller than that of the circular hole in the middle of the defluorination partition plate.
Preferably, the height-diameter ratio of the reactor device is 4 to 6, and the height ratio of the defluorination zone to the denitrification zone is 1.5 to 1.
Preferably, one side of the upper part of the defluorination zone is provided with a water quality monitoring instrument for detecting the water quality condition of the defluorination outlet water.
The invention also provides a wastewater synchronous denitrification and defluorination treatment method, and the integrated wastewater synchronous denitrification and defluorination reactor device comprises the following steps:
the wastewater containing fluorine and nitrogen to be treated enters a water inlet area of a reactor device through a water inlet pipe, the water flow rises in a cyclone manner in a defluorination area through a first defluorination partition plate, a second defluorination partition plate, a third defluorination partition plate and a fourth defluorination partition plate and is fully mixed with an external defluorination medicament through a medicament feeding pipe and a medicament feeding water distributor to carry out a rapid chemical defluorination process, and calcium fluoride sludge generated in the defluorination process flows into a sludge receiving pipe and then is discharged out of the reactor through a sludge discharge pipe; part of the effluent after defluorination is refluxed into a water inlet area through a reflux water outlet pipe, a reflux pump and a reflux water inlet pipe, the rotational flow state of water flow in the defluorination area is strengthened through the reflux effect, the stirring effect of the defluorination area is strengthened, so that the wastewater and a defluorination agent are mixed more fully and uniformly, the other part of the effluent after defluorination is continuously ascended through a guide cylinder and enters a short-cut nitrification area of a denitrification area, at the moment, high-pressure gas is used for aerating the wastewater in the short-cut nitrification area through an air inlet pipe and an aeration system, so that ammonia oxidizing bacteria convert about 50% of ammonia in the wastewater into nitrite, the wastewater enters an anaerobic ammonia oxidation area again, and the residual ammonia nitrogen and the generated nitrite react through anaerobic ammonia oxidizing bacteria to realize the removal of nitrogen; and the effluent treated by the denitrification area continuously enters the effluent area, gas, liquid and solid are separated under the action of the three-phase separator, the gas is discharged from the exhaust pipe, the anaerobic ammonia oxidation granular sludge returns to the denitrification area again, and the treated effluent is directly discharged from the water outlet pipe after passing through the sawtooth-shaped effluent weir.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) The fluorine-containing and nitrogen-containing wastewater is subjected to defluorination treatment, so that the toxic action of fluorine ions on microorganisms can be effectively reduced, and the subsequent biological denitrification efficiency is improved.
(2) And the fluorine is removed without membrane filtration, chemical concentration and other modes, so that the operation cost of the process and the complexity of management are reduced.
(3) The anaerobic ammonium oxidation process is adopted for denitrification, no additional carbon source is needed to be added, compared with the traditional biological denitrification process, the excess sludge yield is greatly reduced, the operating cost is saved, and the efficient and economic denitrification is realized.
(4) The reactor has multiple functions of chemical defluorination, biological denitrification and the like, can finish synchronous denitrification and defluorination, and has small occupied area and short hydraulic retention time.
Drawings
FIG. 1 is a schematic structural diagram of an integrated wastewater synchronous denitrification and defluorination reactor device.
FIG. 2 is a schematic view of the baffle plate of the fluorine removal zone of the reactor apparatus.
Reference numerals: 1-a reactor shell; 2-a sludge discharge pipe; 3-water inlet pipe; 4-a mud receiving pipe; 5-a screw rod; 6-a defluorination sampling port; 7-an air inlet pipe; 8, an air compressor; 9-an aeration system; 10-a guide shell; 11-a denitrification sampling port; 12-an inner cylinder; 13-a three-phase separator; 14-a water outlet pipe; 15-an effluent weir; 16-an exhaust pipe; 17-a deflector; 18-an anammox zone; 19-a short-cut nitrification zone; 20-a separator; 21-water quality detecting instrument; 22-a backflow water outlet pipe; 23-a fourth defluorination partition board; 24-a third defluorination partition board; 25-a second defluorination partition; 26-a first defluorination partition board; 27-adding a medicine water distributor; 28-a medicine feeding pipe; 29-backflow water inlet pipe; 30-a reflux pump; 31-a separator A; 32-partition B; in addition, I-a water inlet area; II, a defluorination area; III-a denitrification zone; IV-water outlet zone.
Detailed Description
The invention is further illustrated with reference to the figures and examples.
As shown in FIG. 1, the present invention provides an integrated wastewater simultaneous denitrification and defluorination reactor device, which can be used as a reactor for industrial wastewater containing fluorine and nitrogen. The reactor comprises a reactor shell 1, wherein the whole reactor device is cylindrical, the lower part of the reactor device is in an inverted truncated cone shape, and a reactor cavity is internally divided into a water inlet area I, a defluorination area II, a denitrification area III and a water outlet area IV from bottom to top in sequence. The height-diameter ratio of the reactor device is 4 to 6, and the height ratio of the defluorination zone II to the denitrification zone III is 1.5 to 1.
Wherein, be equipped with mud pipe 2 on the lateral wall of one side of water intake zone I bottom, mud pipe 2 upper portion is equipped with inlet tube 3 that can the uniform water distribution, opens the water distribution hole that has equidistant but different apertures on inlet tube 3 to realize the purpose of uniform water distribution. A backflow water inlet pipe 29 is arranged at the same height on the other side of the water inlet pipe 3; the water inlet pipe 3 is opposite to the water outlet of the backflow water inlet pipe 29, so that water can be carried in the center position for hedging through the inflow and backflow, and therefore sufficient mixing is achieved.
A first defluorination partition plate 26, a second defluorination partition plate 25, a third defluorination partition plate 24 and a fourth defluorination partition plate 23 are sequentially arranged in the chamber of the defluorination area II from bottom to top, and the schematic diagram of the four defluorination partition plates is shown in figure 2. The first defluorination partition plate 26, the second defluorination partition plate 25, the third defluorination partition plate 24 and the fourth defluorination partition plate 23 are all the same in shape and are circular, and all the defluorination partition plates consist of a non-perforated partition plate A31 and a perforated partition plate B32, and a larger circular hole is arranged in the middle of the first defluorination partition plate. The partition B32 is provided with a plurality of water distribution holes for water distribution, the shape and the size of each water distribution hole are the same, the open pores of the partition B32 of each defluorination partition can be arranged in equal area or unequal area, and the defluorination partition can be arranged as long as the relative deflection of the open pores can be realized. In one embodiment, the openings of the partition plates B32 of each defluorination partition plate are arranged in the same area, and the installation operation can be conveniently carried out by the arrangement mode. Further, the partition board A31 is horizontally arranged in the chamber of the defluorination zone II, the partition board A31 is arranged in an inclined mode, the included angle alpha formed by the partition board A31 and the inner wall of the defluorination zone II is 60-70 degrees, the periphery of the partition board A31 is slightly curled inwards, and sewage can be further guided to flow downwards through the arrangement mode. The first defluorination partition board 26, the second defluorination partition board 25, the third defluorination partition board 24 and the fourth defluorination partition board 23 are mutually staggered to make the partition board B32 be 90 degrees, specifically, the boundary line between the partition board A31 and the partition board B32 is used as a reference, the height direction is from bottom to top, the anticlockwise direction is used as positive, the boundary line angle of the fourth defluorination partition board 23 is 0 degree, the boundary line angle of the third defluorination partition board 24 is 90 degrees, the boundary line angle of the second defluorination partition board 25 is 180 degrees, the boundary line angle of the first defluorination partition board 26 is 270 degrees, and the liquid in the defluorination area is made to rise in a swirling flow by the arrangement.
A chemical feeding pipe 28 is arranged on one side of the lower part of the first defluorination partition plate 26, the front end of the chemical feeding pipe 28 is connected with a chemical feeding water distributor 27, and the wastewater in the defluorination area II is fully mixed with an additional defluorination reaction chemical agent calcium chloride and the like of the chemical feeding water distributor 27 to carry out a rapid chemical defluorination process. A backflow water outlet pipe 22 is arranged on one side of the upper part of the fourth defluorination partition plate 23, and the backflow water outlet pipe 22 is connected with a backflow water inlet pipe 29 of the water inlet area I through a backflow pump 30.
A vertical mud receiving pipe 4 is arranged in the center in the cavity of the defluorination zone II, the mud receiving pipe 4 penetrates through a first defluorination partition plate 26, a second defluorination partition plate 25, a third defluorination partition plate 24 and a fourth defluorination partition plate 23, the horizontal height of the upper end of the mud receiving pipe 4 is lower than that of the backflow water outlet pipe 22, and the lower end of the mud receiving pipe 4 is connected with a mud discharge pipe 2; furthermore, a spiral groove is milled on the mud receiving pipe 4, the pitch-diameter ratio of the spiral groove is 0.75, the mud receiving pipe 4 and the circular hole in the middle of the defluorination partition board are coaxially arranged, and the diameter of the mud receiving pipe is smaller than that of the circular hole in the middle of the defluorination partition board.
The relative position between every defluorination baffle can the activity setting, when the activity setting, can form the reaction space of different volumes between two adjacent filter to improve the treatment effect to sewage. Specifically, in order to realize the position adjustment of the defluorination partition plates, screw rod structures 5 are respectively installed on the front, back, left and right sides of the defluorination area II, the screw rod structures 5 which are symmetrically arranged form a group of screw rod groups, two screw rod structures of one screw rod group are symmetrically arranged on two sides of the first defluorination partition plate 26 and the third defluorination partition plate 24, the other screw rod group is symmetrically arranged on two sides of the second defluorination partition plate 25 and the fourth defluorination partition plate 23, and each screw rod structure is respectively connected with the two partition plates. Each set of screw rod structure is provided with a driving motor which can directly adopt a stepping motor, the stepping motor is controlled by a PLC, a guide track is arranged on the shell 1, the movable end of the screw rod structure 5 is embedded into the guide track and moves in the guide track, and therefore the first defluorination partition plate 26, the second defluorination partition plate 25, the third defluorination partition plate 24 and the fourth defluorination partition plate 23 are controlled to move.
The bottom of the denitrification area III is provided with a partition plate 20 and a guide cylinder 10, the guide cylinder 10 is connected with the partition plate 20, the partition plate 20 separates the defluorination area II from the denitrification area III, the denitrification area III is sequentially provided with a shortcut nitrification area 19 and an anaerobic ammonia oxidation area 18 from inside to outside, and the shortcut nitrification area 19 and the anaerobic ammonia oxidation area 18 are separated by an inner cylinder 12 arranged in the center of the denitrification area III; the short distance nitration zone 19 lower part be equipped with the intake pipe 7 that is used for the aeration and be used for increasing the aeration system 9 of dissolved oxygen content, because at defluorination in-process plus calcium chloride etc. remaining calcium ion in the waste water chooses for use ordinary tubular or disk aerator probably to cause the aerator to block up, for avoiding this problem, aeration system 9 adopts a plurality of high-efficient aerators that suspend and mix, this aerator has dissolved oxygen characteristics such as efficient, the pressure loss is little, the stirring strength is strong. Aeration system 9 is connected with intake pipe 7, and intake pipe 7 is connected with air compressor machine 8.
And guide plates 17 are arranged on two sides of the lower part of the water outlet area IV, the guide plates 17 are positioned above the inner cylinder 12, the included angle beta between the guide plates 17 and the inner wall of the shell 1 is 60 degrees, a three-phase separator 13 is arranged in the center of the water outlet area IV, the upper part of the three-phase separator 13 is connected with an exhaust pipe 16, the included angle gamma between the inverted horn mouth of the lower part of the three-phase separator and the horizontal direction is 60 degrees, a saw-tooth-shaped water outlet weir 15 is arranged on the upper part of the water outlet area IV, and a water outlet pipe 14 is arranged on one side of the lower part of the saw-tooth-shaped water outlet weir 15.
In order to realize real-time monitoring of the sewage quality, the side wall of the defluorination zone II is provided with a plurality of defluorination sampling ports 6 which are used for extracting a water sample in the defluorination zone II and carrying out assay analysis; and a plurality of denitrification sampling ports 11 are arranged on the side wall of the denitrification area III and are used for extracting a water sample in the denitrification area III to perform assay analysis. And meanwhile, a water quality monitoring instrument 21 for monitoring the water quality condition of the defluorination outlet water is arranged on one side of the upper part of the defluorination area II, so that the defluorination process is controlled in real time.
Based on the integrated wastewater synchronous denitrification and defluorination reactor device, the wastewater synchronous denitrification and defluorination treatment method comprises the following steps:
when the reactor device operates, fluorine-containing and nitrogen-containing wastewater to be treated flows into a water inlet area I at the bottom of the reactor device through a water inlet pipe 3, the wastewater flows into a defluorination area II of the reactor device through an opening partition plate B32 of a first defluorination partition plate 26 under the action of pressure, the defluorination area II is internally provided with the first defluorination partition plate 26 staggered by 90 degrees, a second defluorination partition plate 25, a third defluorination partition plate 24 and a fourth defluorination partition plate 23, water flows through the four defluorination partition plates and rises in the defluorination area II in a rotational flow manner, at the moment, defluorination agent enters the defluorination area II through a dosing pipe 28 and a dosing device 27 to be fully mixed with the wastewater, rapid chemical defluorination reaction is carried out, calcium ions in the defluorination agent react with fluorine ions in the wastewater to generate calcium fluoride precipitates, and then the fluorine ions in the wastewater are removed. Calcium fluoride sludge produced in the defluorination process falls on the baffle A31 which is obliquely arranged, then flows into the sludge receiving pipe 4 along with water flow, is deposited at the bottom of the water inlet area I of the reactor device, and is discharged out of the reactor device through the sludge discharge pipe arranged at the bottom of the water inlet area I. Part of the effluent after defluorination is discharged from a reflux water outlet pipe 22 and flows back to a water inlet area I at the bottom of the reactor device through a reflux pump 30 and a reflux water inlet pipe 29, the rotational flow state of water flow in a defluorination area II can be strengthened through the reflux effect, the stirring effect of the defluorination area II is strengthened, and the wastewater and the defluorination agent are mixed more fully and uniformly; the other part of the effluent after defluorination treatment continuously rises through the guide cylinder 10 and enters the denitrification area III, the denitrification area is divided into a shortcut nitrification area 19 and an anaerobic ammonium oxidation area 18 by an inner cylinder arranged in the denitrification area III, the wastewater firstly enters the shortcut nitrification area 19 to generate shortcut nitrification reaction, at the moment, high-pressure gas aerates the wastewater in the shortcut nitrification area 19 through the gas inlet pipe 7 and the aeration system 9, and part of ammonia in the wastewater is converted into nitrite by ammonia oxidizing bacteria in the shortcut nitrification area 19 to perform shortcut nitrification reaction; and the wastewater enters an anaerobic ammonia oxidation zone 18 filled with anaerobic ammonia oxidation granular sludge, and the anaerobic ammonia oxidation bacteria react residual ammonia nitrogen in the wastewater with generated nitrite to finally remove nitrogen in the wastewater. The effluent treated by the denitrification area III enters an effluent area IV at the upper part of the reactor device, three separators 13 are arranged in the effluent area IV, the three phases of gas, liquid and solid are separated under the action of the three-phase separators 13, the gas is discharged from an exhaust pipe 16, the anaerobic ammonia oxidation granular sludge returns to the denitrification area III again, and the treated effluent passes through a sawtooth-shaped effluent weir 15 and then is discharged from an outlet pipe 14.
Example 1
As shown in figure 1, the reactor device for synchronously denitrifying and defluorinating wastewater is adopted, wherein the height-diameter ratio of the reactor device is 5, and the height ratio of the defluorination zone to the denitrification zone is 1.
The reactor apparatus was used to treat a wastewater 1 containing fluorine and nitrogen at a water content of 100 t/d, and Table 1 shows the effects of the apparatus of this example on the treatment of wastewater 1. As can be seen from Table 1, the reactor apparatus was used for treating wastewater containing fluorine and nitrogen 1,F - The removal rate is 99.42%, NH 4 + The removal efficiency of-N reaches 84.20 percent, the removal efficiency of TN reaches 82.44 percent, and the method has high efficiency
The effect of removing fluoride ions and ammonia nitrogen can realize the synchronous removal of fluorine and nitrogen in the wastewater.
TABLE 1 treatment effect of integrated synchronous denitrification and defluorination apparatus on wastewater 1
Example 2
As shown in figure 1, the reactor device for synchronously denitrifying and defluorinating integrated wastewater, which is described in the embodiment, is adopted, wherein the height-diameter ratio of the reactor device is 5, and the height ratio of the defluorinating zone to the denitriding zone is 1.
The reactor apparatus was used to treat a fluorine-containing and nitrogen-containing wastewater 1 at a water content of 150 t/d, and the effect of the apparatus of this example on the wastewater 2 is shown in Table 2. As can be seen from Table 2, the reactor apparatus was used for treating wastewater containing fluorine and nitrogen 2,F - The removal rate is 99.60 percent, NH 4 + The removal efficiency of-N reaches 87.28%, the removal efficiency of TN reaches 83.07%, the effect of efficiently removing fluorine ions and ammonia nitrogen is achieved, and the synchronous removal of fluorine and nitrogen in wastewater can be achieved.
TABLE 2 treatment effect of integrated synchronous denitrification and defluorination device on wastewater 2
Example 3
As shown in figure 1, the reactor device for synchronously denitrifying and defluorinating integrated wastewater, which is described in the embodiment, is adopted, wherein the height-diameter ratio of the reactor device is 5, and the height ratio of the defluorinating zone to the denitriding zone is 1.
The reactor apparatus was used to treat a fluorine-containing and nitrogen-containing wastewater 1 at a water amount of 400 t/d, and the effect of the apparatus of this example on the treatment of wastewater 3 is shown in Table 3. As can be seen from Table 3, the reactor apparatus was used for treating wastewater containing fluorine and nitrogen 2,F - The removal rate is 99.55 percent, NH 4 + The removal efficiency of-N reaches 87.19%, the removal efficiency of TN reaches 84.20%, the effect of efficiently removing fluorine ions and ammonia nitrogen is achieved, and the synchronous removal of fluorine and nitrogen in wastewater can be achieved.
TABLE 3 treatment effect of integrated synchronous denitrification and defluorination device on wastewater 3
The foregoing is a description of the present invention in connection with specific preferred embodiments and is not intended to limit the present invention to the precise forms or embodiments disclosed herein. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.
Claims (8)
1. The utility model provides an integration synchronous denitrogenation of waste water defluorinating reactor device which characterized in that: the reactor comprises a reactor shell (1), the whole reactor device is cylindrical, the lower part of the reactor device is in an inverted circular truncated cone shape, and a reactor chamber is sequentially divided into a water inlet area, a fluorine removal area, a nitrogen removal area and a water outlet area from bottom to top; a sludge discharge pipe (2) is arranged on one side of the bottom of the water inlet area, a water inlet pipe (3) is arranged on the upper part of the sludge discharge pipe (2), and a backflow water inlet pipe (29) is arranged on the other side of the water inlet pipe (3) at the same height; a first defluorination partition plate (26), a second defluorination partition plate (25), a third defluorination partition plate (24) and a fourth defluorination partition plate (23) are sequentially arranged in a defluorination zone cavity from bottom to top, a chemical feeding pipe (28) used for adding defluorination reaction chemicals is arranged on one side of the lower part of the first defluorination partition plate (26), the front end of the chemical feeding pipe (28) is connected with a chemical feeding water distributor (27), a backflow water outlet pipe (22) is arranged on one side of the upper part of the fourth defluorination partition plate (23), the backflow water outlet pipe (22) is connected with a backflow water inlet pipe (29) of a water inlet zone through a backflow pump (30), a vertical sludge receiving pipe (4) is arranged in the center of the defluorination zone cavity, the sludge receiving pipe (4) penetrates through the first defluorination partition plate (26), the second defluorination partition plate (25), the third defluorination partition plate (24) and the fourth defluorination partition plate (23), the upper end of the sludge receiving pipe (4) is lower than the backflow water outlet pipe (22), and the lower end of the sludge receiving pipe (4) is connected with a sludge discharge pipe (2); the bottom of the denitrification area is provided with a partition plate (20) and a guide cylinder (10), the guide cylinder (10) is connected with the partition plate (20), the partition plate (20) separates the defluorination area from the denitrification area, the denitrification area is sequentially provided with a short-cut nitrification area (19) and an anaerobic ammonia oxidation area (18) from inside to outside, and the short-cut nitrification area (19) and the anaerobic ammonia oxidation area (18) are separated by an inner cylinder (12) arranged in the center of the denitrification area; the two sides of the lower part of the water outlet area are provided with guide plates (17), the included angle beta between the guide plates (17) and the side wall is 60 degrees, the center of the water outlet area is provided with a three-phase separator (13), the upper part of the three-phase separator (13) is connected with an exhaust pipe (16), the included angle gamma between the inverted bell mouth at the lower part of the three-phase separator and the horizontal is 60 degrees, the upper part of the water outlet area is provided with a saw-tooth water outlet weir (15), and one side of the lower part of the saw-tooth water outlet weir (15) is provided with a water outlet pipe (14);
the first defluorination partition plate (26), the second defluorination partition plate (25), the third defluorination partition plate (24) and the fourth defluorination partition plate (23) of the defluorination zone are all composed of a partition plate A (31) and a partition plate B (32), a round hole is formed in the middle of each defluorination partition plate, a plurality of water distribution holes for water distribution are formed in each partition plate B (32), and no hole is formed in each partition plate A (31); the partition board A (31) is horizontally arranged in the defluorination area chamber, the included angle alpha formed by the partition board A (31) and the inner wall of the defluorination area is 60-70 degrees, and the periphery of the partition board A (31) is slightly curled inwards; the first defluorination partition board (26), the second defluorination partition board (25), the third defluorination partition board (24) and the fourth defluorination partition board (23) are mutually staggered to lead the partition board B (32) to be arranged in 90 degrees, and the liquid rises in a defluorination area in a rotational flow manner.
2. The integrated wastewater synchronous denitrification and defluorination reactor device according to claim 1, wherein an air inlet pipe (7) for aeration and an aeration system (9) for increasing the content of dissolved oxygen are arranged at the lower part of the short-cut nitrification zone (19), the aeration system (9) adopts a plurality of suspension aerators, the aeration system (9) is connected with the air inlet pipe (7), and the air inlet pipe (7) is connected with an air compressor (8).
3. The integrated wastewater synchronous denitrification and defluorination reactor device as set forth in claim 1, wherein the front, back, left and right sides of the defluorination zone are respectively provided with a screw rod structure (5), each set of screw rod structure is respectively connected with two partition plates, namely, the partition plate B of the first defluorination partition plate (26) and the partition plate A of the third defluorination partition plate (24) share one set of screw rod structure; the partition board A of the first defluorination partition board (26) and the partition board B of the third defluorination partition board (24) share a set of screw rod structure; the partition board A of the second defluorination partition board (25) and the partition board B of the fourth defluorination partition board (23) share a set of screw rod structure; the baffle B of second defluorination baffle (25) and the baffle A of fourth defluorination baffle (23) share one set of lead screw structure, every set of lead screw structure all is connected with step motor, and step motor passes through PLC control, is provided with the guide rail on casing (1), and the expansion end of lead screw structure (5) is embedded into the guide rail to remove in the guide rail, with this removal of controlling first defluorination baffle (26), second defluorination baffle (25), third defluorination baffle (24) and fourth defluorination baffle (23).
4. The integrated wastewater synchronous denitrification and defluorination reactor device as recited in claim 1, wherein said defluorination zone side wall is provided with a plurality of defluorination sampling ports (6) for extracting water samples in the defluorination zone; the side wall of the denitrification area is provided with a plurality of denitrification sampling ports (11) for extracting water samples in the denitrification area.
5. The integrated wastewater synchronous denitrification and defluorination reactor device as recited in claim 1, wherein a spiral groove is milled on said sludge receiving pipe (4), the pitch-diameter ratio of the spiral groove is 0.75, the sludge receiving pipe (4) is coaxially arranged with the circular hole in the middle of the defluorination partition plate, and the diameter of the circular hole is smaller than the diameter of the circular hole in the middle of the defluorination partition plate.
6. The integrated wastewater synchronous denitrification and defluorination reactor device as claimed in claim 1, wherein the height-diameter ratio of the reactor device is 4 to 6, and the height ratio of the defluorination zone to the denitrification zone is 1.5 to 1.
7. The integrated wastewater synchronous denitrification and defluorination reactor device as recited in claim 1, wherein a water quality monitoring instrument (21) for monitoring the water quality of the defluorination effluent is arranged at one side of the upper part of the defluorination zone.
8. A synchronous denitrification and defluorination treatment method for wastewater, which is characterized in that the integrated synchronous denitrification and defluorination reactor device for wastewater of any one of claims 1 to 7 is adopted, and comprises the following steps:
the wastewater containing fluorine and nitrogen to be treated enters a water inlet area of a reactor device through a water inlet pipe (3), the water flow rises in a rotational flow manner in a defluorination area through a first defluorination partition plate (26), a second defluorination partition plate (25), a third defluorination partition plate (24) and a fourth defluorination partition plate (23) and is fully mixed with an additional defluorination medicament through a medicament feeding pipe (28) and a medicament feeding water distributor (27) to carry out a rapid chemical defluorination process, and calcium fluoride sludge generated in the defluorination process flows into a sludge receiving pipe (4) and then is discharged out of the reactor through a sludge discharge pipe (2); one part of effluent after defluorination treatment flows back to a water inlet area through a backflow water outlet pipe (22), a backflow pump (30) and a backflow water inlet pipe (29), the rotational flow state of water flow in the defluorination area is strengthened through the backflow effect, the stirring effect of the defluorination area is strengthened, so that the wastewater and a defluorination agent are mixed more fully and uniformly, the other part of effluent after defluorination treatment continuously rises into a short-cut nitrification area (19) of a denitrification area through a guide cylinder (10), at the moment, high-pressure gas aerates the wastewater in the short-cut nitrification area (19) through an air inlet pipe (7) and an aeration system (9), so that ammonia oxidizing bacteria convert partial ammonia in the wastewater into nitrite, the wastewater enters an anaerobic ammonia oxidation area (18), and the residual ammonia nitrogen and the generated nitrite react through anaerobic ammonia oxidizing bacteria, so that the nitrogen is removed; the effluent treated by the denitrification area continuously enters the effluent area, the gas, the liquid and the solid are separated under the action of a three-phase separator (13), the gas is discharged from an exhaust pipe (16), the anaerobic ammonia oxidation granular sludge returns to the denitrification area again, and the treated effluent is directly discharged from an outlet pipe (14) after passing through a sawtooth-shaped effluent weir (15).
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