CN213738781U - Efficient biological denitrification reaction device for pesticide wastewater - Google Patents

Abstract

The utility model discloses a high-efficient biological denitrification reaction unit of pesticide waste water, high-efficient biological denitrification reaction unit of pesticide waste water includes degree of depth denitrification reactor, contact oxidation reactor and aeration biofiltration pond reactor. The device of the utility model is suitable for treating the chemical industry tail water containing high concentration nitrogen, and has the advantages of simple operation, small occupied area, low operation energy consumption and good treatment effect. This effluent treatment plant combines together degree of depth denitrification reactor, contact oxidation reactor, aeration biological filtration pond reactor, and as the follow-up degree of depth denitrification device of pesticide enterprise sewage station biochemical system, adopt the device of retrenching effectively to handle high enriched nitrogenous waste water, solve conventional denitrification device and be difficult to bear the difficult problem that high load, microorganism run off, denitrogenation effect are unstable.

Description

Efficient biological denitrification reaction device for pesticide wastewater

Technical Field

The utility model relates to a waste water treatment technical field, concretely relates to high-efficient biological denitrogenation reaction unit of pesticide waste water.

Background

The pesticide wastewater treatment is always a wastewater type which is difficult to treat in chemical wastewater treatment, and along with the increasing severity of ecological environment, the requirement for pesticide wastewater treatment is higher and higher. Due to the uniqueness of the production raw materials of the pesticide wastewater, most of the pesticide wastewater contains nitro compounds, organic amine, nitrate and the like, and TN (total nitrogen) of effluent produced by biochemical treatment in a sewage station is usually 150-300 mg/L. Aiming at the characteristics of the biochemical tail water, in order to ensure that the TN index of the discharged water reaches the standard and is discharged, most projects adopt a two-stage A/O (anaerobic/aerobic) + secondary sedimentation process, the process has the characteristics of low operation energy consumption, simple operation and stable treatment effect, the process is selected to be practical for newly-built sewage station projects, the process layout can be planned in place at one time by combining with the process layout, but for the reconstruction projects, the reconstruction difficulty in the original system is higher due to the fact that the requirements of internal reflux and multi-point water inlet need to be set, and the enterprise is often required to stop production and modify, so that the normal production of the enterprise is greatly influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a high-efficient biological denitrification reaction unit of pesticide waste water to conventional denitrification device is difficult to bear the difficult problem that high load, microorganism run off, denitrogenation effect are unstable among the solution prior art.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a high-efficient biological nitrogen removal reaction unit of pesticide waste water, high-efficient biological nitrogen removal reaction unit of pesticide waste water includes degree of depth denitrification reactor, catalytic oxidation reactor and aeration biological filter tank reactor, the lower part of degree of depth denitrification reactor is provided with pesticide waste water entry, nutrient solution entry and first mud pipe, the middle part of degree of depth denitrification reactor is filled with first suspension packing layer, the upper portion of degree of depth denitrification reactor is provided with the top delivery port, the lower part of catalytic oxidation reactor is provided with first water inlet, second mud pipe and first aeration pipe, the middle part of catalytic oxidation reactor is filled with second suspension packing layer, the upper portion of catalytic oxidation reactor is provided with first delivery port, the lower part of aeration biological filter tank reactor is provided with second delivery port, second aeration pipe and third mud pipe, the middle part of the aeration biological filter tank reactor is provided with a polyurethane packing layer, and the upper part of the aeration biological filter tank reactor is provided with a second water inlet.

Furthermore, the deep denitrification reactor is provided with a first water inlet distribution pipe, one end of the first water inlet distribution pipe is provided with the pesticide wastewater inlet and the nutrient solution inlet, and the other end of the first water inlet distribution pipe is positioned below the first suspended filler layer; the contact oxidation reactor is provided with a second water inlet water distribution pipe, one end of the second water inlet water distribution pipe is provided with the first water inlet, and the other end of the second water inlet water distribution pipe is positioned below the second suspended filler layer.

Furthermore, a three-phase separator and a first water outlet tank are sequentially arranged above a first suspended filler layer of the deep denitrification reactor from bottom to top, and the first water outlet tank is communicated with the top water outlet.

Further, degree of depth denitrification reactor still includes backward flow inlet tube, backward flow outlet pipe and backwash pump, the end of intaking of backward flow inlet tube is located first suspension packing layer below, the play water end intercommunication of backward flow inlet tube the water inlet of backwash pump, the delivery port intercommunication of backwash pump the end of intaking of backward flow outlet pipe, the play water end of backward flow outlet pipe is located between first suspension packing layer and the three-phase separator.

Further, a second water outlet groove is arranged above a second suspended filler layer of the contact oxidation reactor, and the second water outlet groove is communicated with the first water outlet;

the top of the aeration biological filtration tank reactor is provided with a cross water inlet tank which is communicated with the cross water inlet tank.

Furthermore, a back flushing gas pipe is arranged at the lower part of the aeration biological filter tank reactor;

the efficient biological denitrification reaction device for the pesticide wastewater further comprises a fan room air inlet pipe, and the fan room air inlet pipe is communicated with the back flush air pipe, the first aeration pipe and the second aeration pipe.

Furthermore, a backwashing clear water inlet is arranged at the lower part of the aeration biological filter tank reactor, and a backwashing waste water outlet is arranged at the upper part of the aeration biological filter tank reactor.

Further, pesticide waste water high efficiency biological denitrification reaction unit still includes a mud house steward, a mud house steward intercommunication first sludge discharge pipe, second sludge discharge pipe and third sludge discharge pipe.

The utility model has the advantages of as follows:

(1) this reaction unit's first order degree of depth denitrification reactor utilizes interior reflux system to improve the velocity of rising of muddy water in the device, can ensure in the reactor waste water and microorganism fully contact, reduce in the reactor waste water short-term flow, improve denitrification system's degasification effect, ensure that reactor denitrification effect is stable. In addition, a suspended biological filler and a three-phase separator are added in the reactor, the biological filler is favorable for the attachment and growth of microorganisms in the reactor, the three-phase separator can effectively separate three phases of water, gas and solid in the device, denitrifying bacteria can be effectively intercepted in the reactor, and the loss of the microbial biomass is reduced.

(2) The second-stage contact oxidation reactor aims to degrade redundant biochemical organic pollutants in the wastewater, including redundant external carbon sources which are not consumed in denitrification reaction and macromolecular organic matters which are co-metabolized in raw water.

(3) The third-stage aeration biological filter tank reactor is used as a tail-end clearance facility of the device, and porous polyurethane filler is adopted, so that the filler has the advantages of high porosity, high film-forming speed and large microorganism load, the treatment effect can be ensured, the SS (solid suspended matter concentration) of effluent of the device can be controlled, a secondary sedimentation tank working section at the tail end of the conventional A/O (anaerobic/aerobic) process is saved, and the occupied area of the facility can be saved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

FIG. 1 is a schematic structural view of a high-efficiency biological denitrification reactor for pesticide wastewater provided by the present invention;

in the figure:

1. a deep denitrification reactor; 11. a pesticide wastewater inlet; 12. a nutrient solution inlet; 13. a first sludge discharge pipe; 14. a first suspension packing layer; 15. a top water outlet; 16. a first water inlet and distribution pipe; 17. a three-phase separator; 18. a first water outlet groove; 191. a backflow water inlet pipe; 192. a backflow water outlet pipe; 193. a reflux pump;

2. a contact oxidation reactor; 21. a first water inlet; 22. a second sludge discharge pipe; 23. a first aeration pipe; 24. a second layer of suspended filler; 25. a first water outlet; 26. a second water inlet and distribution pipe; 27. a second water outlet groove;

3. an aerated biological filtration tank reactor; 31. a second water outlet; 32. a second aeration pipe; 33. a third sludge discharge pipe; 34. a polyurethane filler layer; 35. a second water inlet; 36. a cross water inlet tank; 37. back flushing the air pipe; 38. backwashing a clear water inlet; 39. a backwashing wastewater outlet;

4. an air inlet pipe of a fan room;

5. and (4) a mud outlet main pipe.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in FIG. 1, the present embodiment provides a high efficiency biological nitrogen removal reaction device for pesticide wastewater, which comprises a deep denitrification reactor 1, a contact oxidation reactor 2 and an aeration biological filter tank reactor 3, wherein the lower part of the deep denitrification reactor 1 is provided with a pesticide wastewater inlet 11, a nutrient solution inlet 12 and a first sludge discharge pipe 13, the middle part of the deep denitrification reactor 1 is filled with a first suspension packing layer 14, the upper part of the deep denitrification reactor 1 is provided with a top water outlet 15, the lower part of the contact oxidation reactor 2 is provided with a first water inlet 21, a second sludge discharge pipe 22 and a first aeration pipe 23, the middle part of the contact oxidation reactor 2 is filled with a second suspension packing layer 24, the upper part of the contact oxidation reactor 2 is provided with a first water outlet 25, the lower part of the biological filter tank reactor 3 is provided with a second water outlet 31, A second aeration pipe 32 and a third sludge discharge pipe 33, wherein a polyurethane packing layer 34 is arranged in the middle of the aeration biological filter tank reactor 3, and a second water inlet 35 is arranged at the upper part of the aeration biological filter tank reactor 3.

The device of the utility model is suitable for treating the chemical industry tail water containing high concentration nitrogen, and has the advantages of simple operation, small occupied area, low operation energy consumption and good treatment effect. The wastewater treatment device combines the deep denitrification reactor 1, the contact oxidation reactor 2 and the aeration biological filter tank reactor 3 together to be used as a subsequent deep denitrification device of a biochemical system of a sewage station of a pesticide enterprise, a simplified device is adopted to effectively treat high-concentration nitrogen-containing wastewater, the reaction device is divided into three stages, the first stage is the deep denitrification reactor 1, and the main function is deep denitrification; the second stage is a contact oxidation reactor 2, the main function is to degrade organic pollutants in the wastewater, the third stage is an aeration biological filter reactor 3, and the main function is to further control TN (total nitrogen) and COD (chemical oxygen demand) and SS (suspended solid concentration) indexes of the effluent to ensure that the effluent stably reaches the standard.

Example 2

As shown in fig. 1, the present embodiment provides that the deep denitrification reactor 1 is provided with a first water inlet distribution pipe 16, one end of the first water inlet distribution pipe 16 is provided with the pesticide wastewater inlet 11 and the nutrient solution inlet 12, and the other end is located below the first suspended filler layer 14; the contact oxidation reactor 2 is provided with a second water inlet distribution pipe 26, one end of the second water inlet distribution pipe 26 is provided with the first water inlet 21, and the other end is positioned below the second suspended filler layer 24.

Pesticide wastewater and nutrient solution are respectively introduced through the first water inlet and distribution pipe 16, and can be prepared according to needs, and the deep denitrification reactor 1 and the contact oxidation reactor 2 both adopt counter-flow type, so that the wastewater treatment effect is improved.

Example 3

As shown in fig. 1, in this embodiment, a three-phase separator 17 and a first water outlet tank 18 are sequentially arranged above the first suspended filler layer 14 of the deep denitrification reactor 1 from bottom to top, and the first water outlet tank 18 is communicated with the top water outlet 15.

The three-phase separator 17 of this embodiment can effectively separate the water, gas, solid three-phase in the device, can effectively intercept denitrifying bacteria in the reactor, reduces the loss of microbial biomass, and the first water outlet tank 18 helps to discharge the basically clarified water quickly.

Example 4

As shown in fig. 1, the deep denitrification reactor 1 provided in this embodiment further includes a reflux water inlet pipe 191, a reflux water outlet pipe 192, and a reflux pump 193, wherein a water inlet end of the reflux water inlet pipe 191 is located below the first suspended filler layer 14, a water outlet end of the reflux water inlet pipe 191 is communicated with a water inlet of the reflux pump 193, a water outlet of the reflux pump 193 is communicated with a water inlet end of the reflux water outlet pipe 192, and a water outlet end of the reflux water outlet pipe 192 is located between the first suspended filler layer 14 and the three-phase separator 17.

The embodiment utilizes the internal reflux system to improve the ascending flow velocity of muddy water in the device, can ensure that waste water in the reactor is fully contacted with microorganism, reduces the short flow of waste water in the reactor, improves the degassing effect of the denitrification system, and ensures that the denitrification effect of the reactor is stable.

Example 5

As shown in fig. 1, in the embodiment, a second water outlet groove 27 is provided above the second suspended filler layer 24 of the contact oxidation reactor 2, and the second water outlet groove 27 is communicated with the first water outlet 25; the top of the aeration biological filtration tank reactor 3 is provided with a cross water inlet tank 36, and the cross water inlet tank 36 is communicated with the cross water inlet tank 36.

In the embodiment, the second water outlet groove 27 and the cross water inlet groove 36 are arranged to facilitate the wastewater treated by the contact oxidation reactor 2 to enter the aeration biological filter tank reactor 3, so as to realize the distribution of the wastewater in the aeration biological filter tank reactor 3.

Example 6

As shown in FIG. 1, the present embodiment provides that a back flush air pipe 37 is arranged at the lower part of the aeration biological filtration tank reactor 3; the efficient biological denitrification reaction device for the pesticide wastewater further comprises a fan room air inlet pipe 4, and the fan room air inlet pipe 4 is communicated with the backwashing air pipe 37, the first aeration pipe 23 and the second aeration pipe 32.

In the embodiment, the aeration biological filter tank reactor 3 is backwashed through the backwash air pipe 37 to prevent polyurethane filler from being blocked, and in addition, air is introduced through the air inlet pipe 4 of the fan room, so that the air distribution efficiency is improved.

Example 7

As shown in FIG. 1, the present embodiment provides that the aeration biological filtration tank reactor 3 is provided with a backwash clear water inlet 38 at the lower part and a backwash waste water outlet 39 at the upper part.

In the embodiment, part of sewage at the top of the aeration biological filter tank reactor 3 is sent out from the backwashing clear water inlet 38 as backwashing clear water to be sent into the backwashing waste water outlet 39 for backwashing, so that the second water outlet 31 is prevented from being blocked.

Example 8

As shown in fig. 1, the embodiment provides the efficient biological denitrification reaction device for pesticide wastewater, further comprising a sludge outlet main pipe 5, wherein the sludge outlet main pipe 5 is communicated with the first sludge discharge pipe 13, the second sludge discharge pipe 22 and the third sludge discharge pipe 33.

This embodiment collects the output with the mud of whole device through going out mud house steward 5, has improved efficiency.

Example 9

This embodiment provides the utility model discloses the process flow of device.

The first-stage deep denitrification reactor 1 adopts an upflow type, and comprises a first sludge discharge pipe 13, a first water inlet and distribution pipe 16, a backflow water inlet pipe 191, a first suspended filler layer 14, a backflow water outlet pipe 192, a three-phase separator 17, a first water outlet tank 18 and a backflow pump 193. Biochemical effluent of the sewage station is conveyed to a first water inlet distribution pipe 16 at the bottom of the deep denitrification reactor 1 through pump pressure, uniform water distribution is realized through a water distributor on the first water inlet distribution pipe 16, the wastewater passes through the microbial organisms in the middle layer of the device, TN index in the wastewater is effectively degraded, and effluent of the first-stage deep denitrification reactor 1 automatically flows out from a first water outlet groove 18 at the top. In order to improve the denitrification effect in the deep denitrification reactor 1 and avoid the short-flow phenomenon in the reactor, the sludge in the reactor needs to be kept in a fluidized state, and a set of reflux system is arranged in the deep denitrification reactor 1 to ensure the stable ascending flow velocity in the system. Along with the process of denitrification, a large amount of nitrogen can be generated in the reactor, in order to reduce the loss of denitrification floras in the reactor and effectively separate gas, water and mud three phases, a biological suspended filler is arranged in the middle layer of the reactor and used for attaching the floras, and a set of three-phase separator 17 is arranged above a backflow water outlet pipe and used for separating mud, water and gas three phases.

The second-stage contact oxidation reactor 2 adopts upward flow, and comprises a second sludge discharge pipe 22, a second water inlet and distribution pipe 26, a first aeration pipe 23, a second suspension packing layer 24 and a second water outlet tank 27. The water inlet of the second-stage contact oxidation reactor 2 is the water outlet of the first-stage deep denitrification reactor 1, the water outlet of the first-stage contact oxidation reactor 2 automatically flows to a second water inlet distribution pipe 26 of the second-stage contact oxidation reactor 2, uniform water distribution is realized through the second water inlet distribution pipe 26, biodegradable organic matters in the wastewater are decomposed through aerobic microorganisms in the middle layer of the reactor, and the water outlet of the second-stage contact oxidation reactor 2 automatically flows to a subsequent third-stage reactor from a second water outlet groove 27 at the top.

The third stage aeration biological filter reactor 3 adopts downward flow, and the reactor comprises a cross water inlet groove 26, a polyurethane packing layer 34, a packing fixing frame, a back flushing air pipe 37, a second aeration pipe 32 and a water outlet pipe. The effluent of the second-stage contact oxidation reactor 2 automatically flows to a cross water inlet groove 26 at the top of a third-stage biological aerated filter reactor 3, water is uniformly distributed into the reactor from the cross water inlet groove 26, wastewater passes through a middle packing layer of the reactor, the packing layer adopts porous polyurethane packing, the reactor has the characteristics of high porosity, high film forming speed and large microorganism loading capacity, aerobic and anoxic microorganism environments are respectively formed on the surface layer and inside of the packing in the operation process, and denitrification and decarbonization in the system are facilitated. The wastewater flows out from the bottom water outlet pipe after passing through the packing layer. Considering that the reactor is of a filter tank structure, the filler pores are small, and in order to avoid filler blockage and influence on treatment effect caused by long-term operation, a backwashing air pipe and a backwashing water inlet main pipe are arranged in the reactor, and the filler layer is periodically flushed by adopting an air-water combined flushing mode.

Considering that the device is suitable for treating effluent water of a biochemical process of a sewage station, the wastewater contains few biodegradable microorganisms, and the organic matters in the wastewater are simply utilized for denitrification, so that the requirement of the denitrification on the C/N ratio is difficult to meet, the reaction device needs to be matched with a carbon source adding device for adding nutrient solution for adjusting the water inlet C/N ratio of the device.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. The efficient biological denitrification reaction device for the pesticide wastewater is characterized by comprising a deep denitrification reactor (1), a contact oxidation reactor (2) and an aeration biological filter tank reactor (3), wherein a pesticide wastewater inlet (11), a nutrient solution inlet (12) and a first sludge discharge pipe (13) are arranged at the lower part of the deep denitrification reactor (1), a first suspension packing layer (14) is filled in the middle of the deep denitrification reactor (1), a top water outlet (15) is arranged at the upper part of the deep denitrification reactor (1), a first water inlet (21), a second sludge discharge pipe (22) and a first aeration pipe (23) are arranged at the lower part of the contact oxidation reactor (2), a second suspension packing layer (24) is filled in the middle of the contact oxidation reactor (2), the upper portion of catalytic oxidation reactor (2) is provided with first delivery port (25), the lower part of aeration biological filtration pond reactor (3) is provided with second delivery port (31), second aeration pipe (32) and third mud pipe (33), the middle part of aeration biological filtration pond reactor (3) is provided with polyurethane packing layer (34), the upper portion of aeration biological filtration pond reactor (3) is provided with second water inlet (35).

2. The efficient biological denitrification reaction device for pesticide wastewater as recited in claim 1, wherein the deep denitrification reactor (1) is provided with a first water inlet distribution pipe (16), one end of the first water inlet distribution pipe (16) is provided with the pesticide wastewater inlet (11) and the nutrient solution inlet (12), and the other end is positioned below the first suspension packing layer (14); the contact oxidation reactor (2) is provided with a second water inlet and distribution pipe (26), one end of the second water inlet and distribution pipe (26) is provided with the first water inlet (21), and the other end is positioned below the second suspended filler layer (24).

3. The efficient biological denitrification reaction device for pesticide wastewater as recited in claim 1, wherein a three-phase separator (17) and a first water outlet tank (18) are sequentially arranged above the first suspended filler layer (14) of the deep denitrification reactor (1) from bottom to top, and the first water outlet tank (18) is communicated with the top water outlet (15).

4. The efficient biological denitrification reaction device for pesticide wastewater as claimed in claim 3, wherein the deep denitrification reactor (1) further comprises a backflow water inlet pipe (191), a backflow water outlet pipe (192) and a backflow pump (193), the water inlet end of the backflow water inlet pipe (191) is positioned below the first suspended filler layer (14), the water outlet end of the backflow water inlet pipe (191) is communicated with the water inlet of the backflow pump (193), the water outlet of the backflow pump (193) is communicated with the water inlet end of the backflow water outlet pipe (192), and the water outlet end of the backflow water outlet pipe (192) is positioned between the first suspended filler layer (14) and the three-phase separator (17).

5. The efficient biological denitrification reaction device for pesticide wastewater as recited in claim 1, wherein a second water outlet tank (27) is arranged above a second suspended filler layer (24) of the contact oxidation reactor (2), and the second water outlet tank (27) is communicated with the first water outlet (25);

the top of the aeration biological filtration tank reactor (3) is provided with a cross water inlet tank (36), and the cross water inlet tank (36) is communicated with the cross water inlet tank (36).

6. The efficient biological denitrification reaction device for pesticide wastewater as recited in claim 1, wherein a back flushing pipe (37) is arranged at the lower part of the aeration biological filter tank reactor (3);

the efficient biological denitrification reaction device for the pesticide wastewater further comprises a fan room air inlet pipe (4), wherein the fan room air inlet pipe (4) is communicated with the back flush air pipe (37), the first aeration pipe (23) and the second aeration pipe (32).

7. The efficient biological denitrification reactor for pesticide wastewater as claimed in claim 1, wherein the aeration biological filter tank reactor (3) is provided with a backwash clear water inlet (38) at the lower part and a backwash wastewater outlet (39) at the upper part.

8. The apparatus for efficient biological denitrification of pesticide wastewater as set forth in claim 1, further comprising a sludge main pipe (5), wherein the sludge main pipe (5) is in communication with the first sludge pipe (13), the second sludge pipe (22) and the third sludge pipe (33).

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