CN210683338U - Pneumatic control type biological denitrification synchronous recovery N2O reactor - Google Patents
Pneumatic control type biological denitrification synchronous recovery N2O reactor Download PDFInfo
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Abstract
The utility model discloses a synchronous N that retrieves of gas accuse formula biological denitrogenation2The device comprises an O reactor, wherein the O reactor is sequentially provided with an annular water distribution area, a pneumatic control reaction area and a mud-water separation area from bottom to top. The lower part of the annular water distribution area is provided with an emptying pipe, an air inlet header pipe and a micropore aeration pipe, and the upper part is provided with a main water inlet pipe and three inclined water distributors. The lower partition plate of the mud-water separation zone is provided with a converging type U-shaped pneumatic control pipe, a safety pipe and a self-service pressure mud discharge pipe, and the two U-shaped pneumatic control pipes converge to the ascending main pipe; the upper part of the mud-water separation zone is provided with a gas collection chamber, the lower end of the gas collection chamber is communicated with a central liquid return pipe, and the upper end of the gas collection chamber is connected with a gas collection pipe; the middle part of the mud-water separation area is provided with an overflow weir. The utility model utilizes the inert gas to blow off and control the denitrification intermediate product N2High efficiency production of ORaw water is collected, the wastewater is biologically denitrified and energy gas N is generated2Trapping organic combination by O; the converging type U-shaped gas control pipe and the central liquid return pipe are utilized to realize gas recycling, and meanwhile, the whole reaction zone has good mass transfer capacity and the treatment effect is enhanced.
Description
Technical Field
The utility model relates to a denitrification reactor especially relates to a synchronous N of retrieving of gas accuse formula biological denitrogenation2And (4) an O reactor.
Background
Nitrogen is one of the major pollutants in wastewater. According to the environmental condition bulletin of the department of environmental protection, the total ammonia nitrogen discharge amount in 2015 in China is 229.9 ten thousand tons. Research has shown that, in addition to nitrogen, various intermediates of the nitrogen cycle can have adverse effects on the environment and human beings. As a nutrient substance, nitrogen can induce 'eutrophication', which causes functional disorder of a water body ecological system; as an energy source, ammonia nitrogen and nitrite nitrogen can consume dissolved oxygen, so that the water body is anoxic, and the water body can become black and smelly in severe cases; as a poison, ammonia nitrogen can affect the binding of oxygen in the blood, causing death to aquatic animals. In short, the nitrogen pollution of water in China has the characteristics of large discharge amount, wide pollution range, large harm and the like, and a novel high-efficiency biological wastewater denitrification technology is urgently needed.
Biological denitrification refers to a process that microorganisms utilize an exogenous electron donor to reduce nitrate nitrogen through dissimilation to finally generate nitrogen. Biological denitrification is a microbiological process that converts dissolved nitrogen into gaseous nitrogen, thereby purifying water, and has been successfully applied to various sewage treatment systems around the world. During the course of conventional denitrification reactions, nitrous oxide (N) is produced as an intermediate product2O)。N2O is a strong greenhouse gas with a greenhouse effect of about CO2298 times of the total amount of the active ingredients, is stable in chemical property and has remarkable influence on the environment, and has attracted high social attention. But at the same time it is also a strong oxidant and a potential renewable energy source, 1mol CH4And N2Combustion of OThe energy ratio of generation is 1mol of CH4And O2The increase is 30%. Therefore, if the energy gas in the wastewater treatment system can be flexibly captured, the sustainable nitrogen removal and energy recovery of the water body can be effectively realized.
Disclosure of Invention
The utility model aims to collect the energy gas N in the denitrification process when realizing high-efficiency biological denitrification on the nitrogen-containing wastewater2O, thereby providing a pneumatic control type biological denitrification synchronous recovery N2And (4) an O reactor.
The utility model discloses the technical scheme who specifically adopts as follows:
pneumatic control type biological denitrification synchronous recovery N2The device comprises an O reactor, wherein the O reactor is sequentially provided with an annular water distribution area, a pneumatic control reaction area and a mud-water separation area from bottom to top;
one side of the bottom of the annular water distribution area is provided with an emptying pipe, the other side of the bottom of the annular water distribution area is provided with an air inlet header pipe, and the air inlet header pipe is connected with a microporous aeration pipe in the middle of the bottom; the upper part of the annular water distribution area is surrounded by a main water inlet pipe, the main water inlet pipe is connected with three bevel water distributors above, and water distribution ports of the bevel water distributors extend into the annular water distribution area and face downwards; the annular water distribution area is connected with the pneumatic control reaction area; the pneumatic control reaction zone and the mud-water separation zone are separated by a diaphragm plate; the transverse clapboard is provided with at least 1 safety pipe communicated with the pneumatic control reaction zone and the mud-water separation zone, the top of the safety pipe is flush with the upper surface of the transverse clapboard, and the bottom of the safety pipe extends into the pneumatic control reaction zone; the slurry and water separation zone is internally provided with a gas collection chamber, an overflow weir, a converging U-shaped pneumatic control pipe and a self-service pressure sludge discharge pipe, the converging U-shaped pneumatic control pipe is formed by converging the tops of two symmetrical pneumatic control pipes into a U shape, the converging position is connected with the bottom of the ascending main pipe, and the top of the ascending main pipe extends into the gas collection chamber; the bottoms of the two gas control pipes of the converging type U-shaped gas control pipe penetrate through the transverse partition plate and then extend into the gas control reaction zone, and the opening height of the bottom is higher than that of the bottom opening of the safety pipe; the top of the self-help pressure sludge discharge pipe is positioned on the upper surface of the diaphragm plate, and the bottom of the self-help pressure sludge discharge pipe extends out of the reactor; the lower end of the gas collection chamber is communicated with a central liquid return pipe, the central liquid return pipe penetrates through the diaphragm plate and then extends to the upper part of the annular water distribution area, and the gas collection chamber is connected to the outside of the reactor through a gas collection pipe; the overflow weir is annularly arranged along the inner wall of the mud-water separation zone, and the water collection cavity of the overflow weir is connected to the outside of the reactor through a water outlet pipe.
Preferably, the height ratio of the annular water distribution area, the pneumatic control reaction area and the mud-water separation area is 1: (9-10): (3-4), the ratio of the sum of the heights of the annular water distribution zone and the pneumatic control reaction zone to the diameter of the pneumatic control reaction zone is (5-7): 1.
preferably, the ratio of the diameter of the mud-water separation zone to the diameter of the pneumatic control reaction zone is (1.5-1.8): 1.
preferably, the three inclined-cut water distributors are uniformly distributed along the circumferential direction of the annular water distribution area, and water distribution ports of the three inclined-cut water distributors are obliquely and downwards arranged and are inclined towards the same direction on the horizontal plane to form annular water flow.
Preferably, the distance between the bottom of the converging U-shaped pneumatic control pipe and the bottom of the mud-water separation zone is 0.07-0.08 of the height of the reaction zone; the diameter of the U-shaped pneumatic control pipe is 1/10-1/9 of the diameter of the pneumatic control reaction zone.
Preferably, the overflow weir is positioned at the 2/3 height of the mud-water separation zone, the middle part of the gas collection chamber is equal to the upper edge of the overflow weir in height, the diameter of the gas collection chamber is 0.4-0.5 of the diameter of the pneumatic control reaction zone, and the height of the gas collection chamber is 1/3 of the height of the mud-water separation zone.
Preferably, the distance between the bottom end of the central liquid return pipe and the bottom of the annular water distribution area is 0.8-0.9 of the height of the annular water distribution area, and the diameter of the central liquid return pipe is 0.13-0.15 of the diameter of the reaction area.
Preferably, the number of the safety pipes is two, and the bottom opening of the safety pipe is provided with an oblique elbow.
Preferably, the bottom of the top opening of the self-help pressure sludge discharge pipe is flush with the upper surface of the diaphragm plate, and the self-help pressure sludge discharge pipe penetrates through the diaphragm plate and then extends to the annular water distribution area and extends out of the reactor shell.
Compared with the prior art, the utility model beneficial effect be: 1) the utility model utilizes the inert gas to blow off and controls the final product of denitrification nitrogen removal to be N2O, and dissolving N2The O is collected after being blown out from the water, so that the organic combination of biological denitrification and energy gas capture is realized, and the reaction process is carried outThe product is converted into energy for utilization, and waste is changed into valuable; 2) a U-shaped gas control pipe is used for forming a gas chamber at the bottom of the mud-water separation area, and instantaneous negative pressure generated when gas rises is used for refluxing a mud-water mixture at the bottom of the mud-water separation area; part of the mud-water mixture is carried to the air collection chamber by utilizing the ascending gas, so that the mud-water mixture can flow back to the bottom of the reaction area due to a central liquid return pipe communicated with the air collection chamber; thereby leading the whole reactor to have good mass transfer effect and enhancing the treatment depth; 3) the combination of one water inlet main pipe and three inclined cutting type water distributors ensures that the water distribution of the reactor is more uniform, the control of the water inlet amount, the flow velocity and the shearing force is more flexible, and the requirements of various different operating conditions can be met.
Drawings
FIG. 1 shows a pneumatic-control type biological denitrification synchronous recovery of N2A structural section view of the O reactor;
FIG. 2 shows a pneumatic-control type biological denitrification synchronous recovery of N2A side view of the lower part of the sludge-water separation zone of the O reactor (showing the arrangement mode of the confluent U-shaped pneumatic control pipe and the safety pipe on the diaphragm);
FIG. 3 shows a pneumatic controlled biological denitrification synchronous recovery of N2And (4) a top view of the inclined cutting type water distributor of the O reactor.
In the figure: the device comprises an annular water distribution area I, a pneumatic control reaction area II, a mud-water separation area III, an emptying pipe 1, a main air inlet pipe 2, a microporous aeration pipe 3, a main water inlet pipe 4, a beveling type water distributor 5, a converging type U-shaped pneumatic control pipe 6, a safety pipe 7, a main ascending pipe 8, a gas collection chamber 9, a central liquid return pipe 10, a gas collection pipe 11, an overflow weir 12, a self-service pressure mud discharge pipe 13 and a water outlet pipe 14.
Detailed Description
As shown in FIGS. 1, 2 and 3, the method for synchronously recycling N in the pneumatic control type biological denitrification in the embodiment2The O reactor is sequentially provided with an annular water distribution area I, a pneumatic control reaction area II and a mud-water separation area III from bottom to top.
The bottom of the annular water distribution area I is in an inverted cone shape, one side of the annular water distribution area I is provided with an emptying pipe 1 for emptying the internal muddy water mixture, and a control valve is required to be arranged on the emptying pipe 1; the other side is equipped with air intake manifold 2, and air intake manifold 2 passes the casing from the reactor outside and gets into the inner chamber, and annular water distribution zone I bottom center has arranged a micropore aeration pipe 3, and air intake manifold 2 links to each other with the micropore aeration pipe 3 air inlet at bottom center. The upper part of the annular water distribution area I is surrounded by a main water inlet pipe 4, the main water inlet pipe 4 is connected with three inclined water distributors 5 above, and water is uniformly supplied to the three inclined water distributors 5. In this embodiment, the three oblique-cutting water distributors 5 are uniformly distributed along the circumferential direction of the annular water distribution area I, and form an included angle of 120 degrees with each other, the water inlet pipe is in a right-angle shape, the water distribution ports at the tail end of the water inlet pipe extend into the annular water distribution area I and are arranged obliquely downwards, and the water distribution ports of the three oblique-cutting water distributors 5 are inclined towards the same direction on the horizontal plane for forming annular water flow. The annular water distribution area I is communicated with the pneumatic control reaction area II, the annular water distribution area I and the pneumatic control reaction area II are not obviously physically separated, but the pneumatic control reaction area II and the sludge-water separation area III are separated by a diaphragm plate. The diaphragm plates are all compact and waterproof except the positions where the corresponding pipelines are arranged. The diaphragm plate is provided with at least 1 safety pipe 7 communicated with the pneumatic control reaction zone II and the mud-water separation zone III, the top of the safety pipe 7 is flush with the upper surface of the diaphragm plate, and the bottom of the safety pipe extends into the pneumatic control reaction zone II. The safety pipe 7 has two functions, namely, on one hand, the safety pipe is used as a channel for discharging the wastewater treated in the pneumatic control reaction zone II into the mud-water separation zone III, and on the other hand, the safety pipe is also used as a channel for returning the sludge or mud-water mixture precipitated at the bottom of the mud-water separation zone III to the pneumatic control reaction zone II. Of course, these two states are not concurrent, and the switching is controlled by the subsequent confluent U-shaped pneumatic control pipe 6, which will be described in detail later. In this embodiment, two safety pipes 7 may be provided at the same time on the bulkhead to avoid clogging of the safety pipes 7. In addition, because the upper end of the safety pipe 7 is a sedimentation area for separating mud from water, an opening at the bottom of the safety pipe 7 is provided with an oblique elbow to reduce the flow velocity of the entering water flow in order to avoid hydraulic disturbance.
The mud-water separation zone III is provided with a gas collection chamber 9, an overflow weir 13, a converging type U-shaped gas control pipe 6 and a self-service pressure mud discharge pipe 12. The converging type U-shaped pneumatic control pipe 6 is formed by converging the tops of two symmetrical pneumatic control pipes to form a U shape, the converging position is connected with the bottom of the ascending main pipe 8, and the top of the ascending main pipe 8 extends into the gas collection chamber 9. The bottoms of the two air control pipes of the converging type U-shaped air control pipe 6 penetrate through the transverse partition plate and then extend into the air control reaction zone II, and the opening heights of the bottoms of the two air control pipes are higher than those of the bottom openings of the two safety pipes 7. Therefore, when gas is generated in the pneumatic control reaction zone II, the gas is gradually gathered below the diaphragm plate, then a gas chamber is gradually formed, when the gas chamber reaches the bottom opening of the confluent U-shaped pneumatic control pipe 6, the bottom of the safety pipe 7 is still below the liquid level, due to the existence of surface tension, pulse-type gas inflow can be regularly generated at the bottom opening of the confluent U-shaped pneumatic control pipe 6, and the position is a mud-water boundary interface, so that the pulse-type gas can carry a large amount of mud-water mixture to enter the confluent U-shaped pneumatic control pipe 6 and then rise into the gas collection chamber 9, and gas and liquid are separated in the gas collection chamber. The self-pressure sludge discharge pipe 12 is a pipe for discharging sludge, the top of the pipe is positioned on the upper surface of the diaphragm plate, and the bottom of the pipe extends out of the reactor. The sludge precipitated in the sludge-water separation zone III is mainly discharged through the self-service pressure sludge discharge pipe 12, so that the bottom of the top opening of the self-service pressure sludge discharge pipe 12 is preferably flush with the upper surface of the diaphragm plate, and the self-service pressure sludge discharge pipe 12 passes through the diaphragm plate and then extends to the annular water distribution zone I and extends out of the reactor shell. Therefore, the sludge discharge of the pipeline does not need to rely on external power, and the sludge can automatically enter the inlet of the self-service pressure sludge discharge pipe 12 under the action of gravity and the pressure in the sludge-water separation area III. However, because of its lack of suction force, there may still be some sludge deposited on the upper surface of the diaphragm, and this part of sludge can be sucked back to the pneumatic control reaction zone II from the safety pipe 7 due to the instantaneous negative pressure of the pneumatic control reaction zone II during the pulse-type suction of the U-shaped pneumatic control pipe 6.
In addition, a large amount of gas-liquid-solid mixture is sucked into the gas collection chamber 9, so that the lower end of the gas collection chamber is communicated with a central liquid return pipe 10, the central liquid return pipe 10 penetrates through the diaphragm and then extends to the upper part of the annular water distribution area I, and the gas collection chamber 9 is connected to the outside of the reactor through a gas collection pipe 11. Containing N2The gas of O is collected through the gas collecting pipe 11, and the mud-water mixture in the gas collecting chamber 9 flows back to the gas control reaction area II from the central liquid return pipe 10.
In addition, in this embodiment, the overflow weir 13 is annular, the weir opening is a zigzag weir opening, the overflow weir 13 is annularly disposed along the inner wall of the slurry-water separation zone III, and the water collection cavity thereof is connected to the outside of the reactor through the water outlet pipe 14, and is used for discharging the supernatant out of the reactor.
The utility model discloses in, the parameter of each part can adopt following design:
the height ratio of the annular water distribution area I, the pneumatic control reaction area II and the mud-water separation area III is 1: (9-10): (3-4), the ratio of the sum of the heights of the annular water distribution zone I and the pneumatic control reaction zone II to the diameter of the pneumatic control reaction zone II is (5-7): 1. the ratio of the diameter of the mud-water separation zone III to the diameter of the pneumatic control reaction zone II is (1.5-1.8): 1. the distance between the bottom of the converging type U-shaped air control pipe 6 and the bottom of the mud-water separation area III is 0.07-0.08 of the height of the reaction area; the diameter of the U-shaped pneumatic control pipe 6 is 1/10-1/9 of the diameter of the pneumatic control reaction zone II. The overflow weir 12 is positioned at the 2/3 height of the mud-water separation zone III, the middle part of the gas collection chamber 9 is equal to the upper edge of the overflow weir 12 in height, the diameter of the gas collection chamber 9 is 0.4-0.5 of the diameter of the pneumatic control reaction zone II, and the height of the gas collection chamber is 1/3 of the height of the mud-water separation zone III. The distance between the bottom end of the central liquid return pipe 10 and the bottom of the annular water distribution area I is 0.8-0.9 of the height of the annular water distribution area I, and the diameter of the central liquid return pipe 10 is 0.13-0.15 of the diameter of the reaction area II. The height difference between the main water inlet pipe 4 and the water inlet of the beveling type water distributor 5 is 1/10-1/8 of the sum of the heights of the annular water distribution area I and the pneumatic control reaction area II, the length of the water inlet pipe of the beveling type water distributor is 3/4-4/5 of the diameter of the pneumatic control reaction area II, the included angle between the water distribution head of the water distributor and the axis of the water inlet pipe is 30 degrees, and the included angle between the water distribution direction of the water distribution head and the vertical direction is 45 degrees downward.
Pneumatic control type biological denitrification synchronous recovery N by utilizing reactor2The method of O, comprising the steps of:
firstly, the denitrification active sludge is inoculated in the pneumatic control reaction zone II.
Then, the nitrogen-containing wastewater to be treated is input into a reactor which is inoculated with the denitrification activated sludge in advance through a main water inlet pipe 4 and a bevel-cutting water distributor 5, so that the wastewater is filled in an annular water distribution area I, then enters an air-controlled reaction area II upwards, and enters a sludge-water separation area III along a safety pipe 7. After the sludge in the reactor is acclimated, continuously introducing nitrogen-containing wastewater from the water inlet main pipe 4 to ensure that the denitrification activated sludge contacts with the ascending sludge-water mixed liquidIn the process, denitrification biological denitrification is carried out, and microorganisms take in nitrate nitrogen of a liquid phase main body and gradually convert the nitrate nitrogen into nitrite nitrogen, nitric oxide, nitrous oxide and nitrogen. These gases are gradually concentrated below the diaphragms to form gas chambers. In addition, nitrous oxide N, an intermediate product produced during the denitrification reaction2O is dissolved in the mud-water mixture, so that inert gas is required to be introduced into the main gas inlet pipe 2 in the reaction process, and the inert gas is uniformly aerated in the annular water distribution area I through the microporous aeration pipe 3 at the bottom; soluble intermediate product N in the denitrification activated sludge is removed by the blowing of inert gas2O is blown off from the liquid phase and is gathered in the gas chamber in the form of gas phase, thereby realizing the purpose of N2O is the short-range denitrification of the final product.
Because the blown gas and the gas generated in the reaction process are all gathered below the diaphragm plate to form the gas chamber, the volume of the gas chamber is gradually increased, the gas-water interface is gradually moved downwards, and when the bottom of the gas chamber reaches the bottom of the confluent U-shaped pneumatic control pipe 6, the gas can carry partial mud-water mixture in a pulse form to flow into the ascending main pipe 8 from the U-shaped pneumatic control pipe 6 and reach the gas collection chamber 9. And the gas contains N2O, these contain N2The gas of O can be discharged from the reactor through the top gas header 11 and collected by means of a gas storage tank or the like. And the mud-water mixture in the gas collection chamber 9 flows back to the air control reaction area II from the central liquid return pipe 10.
The nitrogen-containing waste water passes through the pneumatic control reaction zone II to complete denitrification treatment of denitrifying bacteria, the treated waste water enters the sludge-water separation zone III along the safety pipe 7, liquid-solid separation is carried out in the sludge-water separation zone III due to the action of gravity, the separated sludge is settled on the transverse partition plate and is periodically discharged out of the reactor through the self-pressure sludge discharge pipe 13, and the supernatant passes through the overflow weir 12 and the water outlet pipe 14 to discharge water. The cross baffle at the bottom of the sludge-water separation area III can not discharge the sludge or sludge-water mixture completely through the self-help pressure sludge discharge pipe 13, so that part of the sludge can be sucked from the safety pipe 7 and then flows back to the pneumatic control reaction area II in the pulse type suction process of the U-shaped pneumatic control pipe 6 due to the instantaneous negative pressure of the pneumatic control reaction area II in the reaction process, the sludge above can not be gathered, and the activated sludge can be utilized to the maximum extent.
The above-mentioned embodiments are merely a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications can be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the mode of equivalent replacement or equivalent transformation fall within the protection scope of the utility model.
Claims (9)
1. Pneumatic control type biological denitrification synchronous recovery N2An O-reactor characterized by: the reactor is sequentially provided with an annular water distribution area (I), a pneumatic control reaction area (II) and a mud-water separation area (III) from bottom to top;
one side of the bottom of the annular water distribution area (I) is provided with a vent pipe (1), the other side of the bottom of the annular water distribution area is provided with an air inlet header pipe (2), and the air inlet header pipe (2) is connected with a microporous aeration pipe (3) in the middle of the bottom; the upper part of the annular water distribution area (I) is surrounded by a main water inlet pipe (4), the main water inlet pipe (4) is connected with three oblique water distributors (5) above, and water distribution ports of the oblique water distributors (5) extend into the annular water distribution area (I) and face downwards; the annular water distribution area (I) is connected with the pneumatic control reaction area (II); the pneumatic control reaction zone (II) and the mud-water separation zone (III) are separated by a diaphragm plate; the transverse clapboard is provided with at least 1 safety pipe (7) communicated with the pneumatic control reaction zone (II) and the mud-water separation zone (III), the top of the safety pipe (7) is flush with the upper surface of the transverse clapboard, and the bottom of the safety pipe extends into the pneumatic control reaction zone (II); the mud-water separation region (III) is internally provided with a gas collection chamber (9), an overflow weir (13), a converging U-shaped pneumatic control pipe (6) and a self-service pressure mud discharge pipe (12), the converging U-shaped pneumatic control pipe (6) is formed by converging the tops of two symmetrical pneumatic control pipes into a U shape, the converging position is connected with the bottom of the ascending main pipe (8), and the top of the ascending main pipe (8) extends into the gas collection chamber (9); the bottoms of the two gas control pipes of the converging type U-shaped gas control pipe (6) penetrate through the diaphragm plate and then extend into the gas control reaction zone (II), and the opening height of the bottom is higher than that of the bottom opening of the safety pipe (7); the top of the self-help pressure sludge discharge pipe (12) is positioned on the upper surface of the diaphragm plate, and the bottom of the self-help pressure sludge discharge pipe extends out of the reactor; the lower end of the gas collection chamber (9) is communicated with a central liquid return pipe (10), the central liquid return pipe (10) penetrates through the diaphragm plate and then extends to the upper part of the annular water distribution area (I), and the gas collection chamber (9) is connected to the outside of the reactor through a gas collection pipe (11); the overflow weir (13) is arranged along the annular direction of the inner wall of the mud-water separation zone (III), and the water collection cavity of the overflow weir is connected to the outside of the reactor through a water outlet pipe (14).
2. The pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the height ratio of the annular water distribution area (I), the pneumatic control reaction area (II) and the mud-water separation area (III) is 1: (9-10): (3-4), the diameter ratio of the sum of the heights of the annular water distribution zone (I) and the pneumatic control reaction zone (II) to the pneumatic control reaction zone (II) is (5-7): 1.
3. the pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the ratio of the diameter of the mud-water separation zone (III) to the diameter of the pneumatic control reaction zone (II) is (1.5-1.8): 1.
4. the pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the three inclined-cutting water distributors (5) are uniformly distributed along the circumferential direction of the annular water distribution area (I), and water distribution ports of the three inclined-cutting water distributors are obliquely and downwards arranged and are obliquely inclined towards the same direction on the horizontal plane to form annular water flow.
5. The pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the distance between the bottom of the converging type U-shaped air control pipe (6) and the bottom of the mud-water separation area (III) is 0.07-0.08 of the height of the reaction area; the diameter of the U-shaped pneumatic control pipe (6) is 1/10-1/9 of the diameter of the pneumatic control reaction zone (II).
6. The pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the overflow weir (13) is positioned at the 2/3-height position of the mud-water separation zone (III), the middle part of the gas collection chamber (9) is equal to the upper edge of the overflow weir (13) in height, the diameter of the gas collection chamber (9) is 0.4-0.5 of that of the pneumatic control reaction zone (II), and the height of the gas collection chamber is higher than that of the pneumatic control reaction zone (II)The degree is 1/3 of the height of the mud-water separation zone (III).
7. The pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the distance between the bottom end of the central liquid return pipe (10) and the bottom of the annular water distribution area (I) is 0.8-0.9 of the height of the annular water distribution area (I), and the diameter of the central liquid return pipe (10) is 0.13-0.15 of the diameter of the reaction area (II).
8. The pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: two safety pipes (7) are provided, and an opening at the bottom of each safety pipe (7) is provided with an oblique elbow.
9. The pneumatic-control type biological denitrification synchronous recovery N according to claim 12An O-reactor characterized by: the bottom of the top opening of the self-help pressure sludge discharge pipe (12) is flush with the upper surface of the diaphragm plate, and the self-help pressure sludge discharge pipe (12) penetrates through the diaphragm plate and then extends to the annular water distribution area (I) and extends out of the reactor shell.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526393A (en) * | 2019-09-24 | 2019-12-03 | 华东理工大学 | The synchronous recycling N of Pneumatic-control type biological denitrificaion2O reactor and its method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526393A (en) * | 2019-09-24 | 2019-12-03 | 华东理工大学 | The synchronous recycling N of Pneumatic-control type biological denitrificaion2O reactor and its method |
| CN110526393B (en) * | 2019-09-24 | 2024-01-26 | 华东理工大学 | Pneumatic control type biological denitrification synchronous recovery N 2 O reactor and method thereof |
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