CN214457138U - System for sewage degree of depth denitrogenation - Google Patents
System for sewage degree of depth denitrogenation Download PDFInfo
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- CN214457138U CN214457138U CN202022391128.9U CN202022391128U CN214457138U CN 214457138 U CN214457138 U CN 214457138U CN 202022391128 U CN202022391128 U CN 202022391128U CN 214457138 U CN214457138 U CN 214457138U
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Abstract
The utility model relates to a water treatment field especially relates to a system of sewage degree of depth denitrogenation. The system comprises: the first membrane reaction zone is used for carrying out membrane-based microbial treatment on a water body to be treated, and a first membrane component is arranged in the first membrane reaction zone; a carrier film in the first membrane component is attached with microorganisms; a second membrane reaction zone for reducing nitrite nitrogen in the water body obtained by the membrane-based microorganism treatment into nitrogen, wherein a second membrane component is arranged in the second membrane reaction zone; the carrier film in the second membrane component is attached with nano metal; the second membrane reaction zone is in fluid communication with the first membrane reaction zone. The utility model discloses realize the denitrification of shortcut nitrification for the total nitrogen pollution thing clearance reaches 95% after sewage is handled, reaches the standard of quasi four kinds of water emission.
Description
Technical Field
The utility model relates to a water treatment field especially relates to a system of sewage degree of depth denitrogenation, and coupling microorganism metabolism and nanometer catalysis realize sewage degree of depth denitrogenation.
Background
With the rapid development of economy in China, the problem of water pollution is increasingly serious. In 2018, the total amount of sewage generated in China is over 700 hundred million tons, and domestic sewage accounts for over 70 percent and becomes a main source of sewage. The domestic sewage is often rich in nitrogen pollutants and phosphorus pollutants, and natural water eutrophication can be caused if the discharge does not reach the standard. In 2015, the total discharge amount of ammonia nitrogen in domestic sewage in cities and towns in China reaches 134.1 ten thousand tons, which accounts for 60 percent of the total discharge amount of all types of sewage. Therefore, the denitrification problem remains a great challenge in the sewage treatment industry of China. Therefore, efficient denitrification and dephosphorization of sewage are still a great challenge in the sewage treatment industry of China.
At present, the sewage denitrification and dephosphorization process mainly adopted by domestic sewage treatment plants is still A2O, SBR and oxidation ditch, etc. The traditional biological treatment process is mature in technology and simple and convenient to operate, but the problems of unstable denitrification process and limited deep denitrification capability are often faced. Particularly, sewage treatment plants in China often face the problem of low COD of sewage, and because a carbon source is required to be consumed in the denitrification process, when the carbon source of the sewage is insufficient, the carbon source needs to be added, so that the treatment cost is increased, and the risk problem that the COD of the effluent exceeds the standard is caused. Compared with the pollutant emission standard (GB18918-2002) of urban sewage treatment plants, the total nitrogen in the 'quasi IV' type emission standard recently proposed in the industry is reduced from 15mg/L to 10mg/L, and the ammonia nitrogen is reduced from 5mg/L to 1.5mg/L, so that the emission standard is increasingly strict. The achievement of high standard emissions by sewage treatment plants is an important trend in future development.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcoming of prior art, the utility model aims at providing a system of sewage degree of depth denitrogenation realizes the short distance and nitrifies the denitrification for sewage is through handling the total nitrogen pollutant removal rate of back and reaching 95%, reaches the standard of quasi four kinds of water emission.
In order to achieve the above objects and other related objects, the present invention provides a system for deep denitrification of wastewater, comprising:
the first membrane reaction zone is used for carrying out membrane-based microbial treatment on a water body to be treated, and a first membrane component is arranged in the first membrane reaction zone; a carrier film in the first membrane component is attached with microorganisms;
a second membrane reaction zone for reducing nitrite nitrogen in the water body obtained by the membrane-based microorganism treatment into nitrogen, wherein a second membrane component is arranged in the second membrane reaction zone; the carrier film in the second membrane component is attached with nano metal;
the second membrane reaction zone is in fluid communication with the first membrane reaction zone.
Preferably, one of the following technical features is also included:
1) the first membrane reaction zone and the second membrane reaction zone are in fluid communication via a communication conduit;
2) the first membrane reaction zone and the second membrane reaction zone are communicated by fluid through more than one flow guide partition wall, and one end of each flow guide partition wall is provided with a water through hole (31);
3) the system further comprises a return conduit through which the second membrane reaction zone is in fluid communication with the first membrane reaction zone;
4) the system further comprises a first air supply duct unit for providing air and/or oxygen, the first air supply duct unit being in communication with the first membrane module;
5) the system also includes a dissolved oxygen concentration detector disposed within the first membrane reaction zone;
6) the system also comprises an aeration unit arranged in the first membrane reaction zone;
7) the system also comprises a second gas supply pipeline unit for supplying hydrogen, wherein the second gas supply pipeline unit is communicated with the second membrane module;
8) the system also comprises a hydrogen concentration detector arranged in the second membrane reaction zone;
9) the system also comprises a detector for the concentration of total nitrogen, ammonia nitrogen and nitrite nitrogen in the second membrane reaction zone.
More preferably, in the feature 2), when the fluid communication is achieved by more than two flow guide partition walls, the water through holes of the adjacent flow guide partition walls are at the opposite ends.
More preferably, at least one of the following technical characteristics is also included:
31) in the characteristic 3), the system further comprises a reflux pump, and the reflux pump is arranged on the reflux pipeline;
32) in the characteristic 3), the system further comprises a return valve, and the return valve is arranged on the return pipeline;
41) in the characteristic 4), the system further comprises a fan, and the fan is communicated with the first air supply pipeline unit;
42) in feature 4), the system further includes a first air supply valve unit, and the first air supply valve unit is disposed on the first air supply duct unit;
43) in the feature 4), the first gas supply pipeline unit comprises a first gas supply first pipeline and a first gas supply second pipeline, and the first gas supply first pipeline and the first gas supply second pipeline are respectively communicated with two ends of the first membrane module;
71) in feature 7), the system further comprises a gas generator, the gas generator being in communication with the second gas supply line unit;
72) in feature 7), the system further comprises a second air supply valve unit, the second air supply valve unit being provided on the second air supply duct unit;
73) in the characteristic 7), the second gas supply pipeline unit includes a second gas supply first pipeline and a second gas supply second pipeline, and the second gas supply first pipeline and the second gas supply second pipeline are respectively communicated with two ends of the second membrane module.
Further more preferably, in feature 43), the system further includes a first air supply valve unit, the first air supply valve unit includes a first air supply valve and a second air supply valve, the first air supply valve is disposed on the first air supply first pipeline, and the second air supply valve is disposed on the first air supply second pipeline.
Further more preferably, in feature 71), the system further comprises a gas generation valve, and the gas generator is communicated with the second gas supply duct unit through the gas generation valve.
Further more preferably, in feature 73), the system further comprises a second air supply valve unit, the second air supply valve unit comprising a second air supply first valve and a second air supply second valve, the second air supply first valve being disposed on the second air supply first pipeline, the second air supply second valve being disposed on the second air supply second pipeline.
Preferably, the system further comprises a control unit in signal connection with at least one of the dissolved oxygen concentration detector, the hydrogen concentration detector, the total nitrogen, ammonia nitrogen and nitrite nitrogen concentration detector, the reflux pump, the reflux valve, the first gas supply valve unit, the first gas supply valve, the first gas supply second valve, the second gas supply valve unit, the second gas supply first valve and the second gas supply second valve.
Preferably, the system further comprises a water inlet and a water outlet, wherein the water inlet is arranged at the upper part of the first membrane reaction zone, and the water outlet is arranged at the upper part of the second membrane reaction zone.
More preferably, the system further comprises a weir in communication with the water outlet.
The technical scheme has the following beneficial effects:
1) the utility model discloses can realize that the total nitrogen clearance of sewage reaches 95%, stably reach the standard that four types of emission are accurate.
2) The utility model discloses it is wide to be suitable for quality of water scope, and the occupation of land is compact, and equipment investment cost is low.
3) The utility model has the advantages of easy and simple to handle, degree of automation is high and the operation is maintained conveniently.
4) The utility model discloses a nanometer catalytic action in second membrane reaction zone influences microbial population and constitutes, and nitrite nitrogen is reduced into nitrogen gas rapidly in the sewage, and Nitrite Oxidizing Bacteria (NOB) growth can be inhibited to nitrite nitrogen's quick consumption, promotes the growth of Ammonia Oxidizing Bacteria (AOB) in first membrane reaction zone, obtains fast and stabilizes the short distance denitrification effect. The microorganism/nano-catalysis coupling can quickly obtain stable and efficient short-cut nitrification-nano-catalysis denitrification effect, and realize the enhanced deep biological denitrification.
5) The utility model discloses the system can realize the short distance denitrification fast according to the testing result developments regulation and control gas pressure and the inner loop ratio of detector.
Drawings
FIG. 1 is a schematic view of a system for deep denitrification of wastewater according to the present invention.
Reference numerals
1 first membrane reaction zone
101 first membrane module
2 second membrane reaction zone
201 second membrane module
3 diversion partition wall
31 water through hole
4 return line
5 first air supply line Unit
51 first supply air first duct
52 first supply second duct
6 dissolved oxygen concentration detector
7 aeration unit
8 second air supply line Unit
81 second air supply first pipeline
82 second gas supply second duct
9 hydrogen concentration detector
10 detector for at least one concentration of total nitrogen, ammonia nitrogen, nitrate nitrogen and nitrite nitrogen
11 reflux pump
12 return valve
13 blower fan
141 first air supply first valve
142 first air supply second valve
15 gas generator
161 first valve for second air supply
162 second air supply second valve
17 gas generating valve
18 control unit
19 water inlet
20 water outlet
21 overflow weir
Detailed Description
In the description of the present invention, it should be noted that the structure, ratio, size, etc. shown in the attached drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by the people familiar with the technology, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention does not have the substantial technical significance, and the modification of any structure, the change of the ratio relationship or the adjustment of the size should still fall within the range that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that can be achieved. While the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
A system for deep denitrification of sewage, as shown in figure 1, comprises:
the device comprises a first membrane reaction zone 1 for carrying out membrane-based microbial treatment on a water body to be treated, wherein a first membrane assembly 101 is arranged in the first membrane reaction zone 1; a carrier membrane attached microorganism in the first membrane module 101;
a second membrane reaction zone 2 for reducing nitrite nitrogen in the water body obtained by the membrane-based microorganism treatment into nitrogen, wherein a second membrane module 201 is arranged in the second membrane reaction zone 2; the carrier film in the second membrane module 201 is attached with nano metal;
the second membrane reaction zone 2 is in fluid communication with the first membrane reaction zone 1.
In a preferred embodiment, the first membrane reaction zone 1 and the second membrane reaction zone 2 are in fluid communication via a communication conduit.
In a preferred embodiment, the first membrane reaction zone 1 and the second membrane reaction zone 2 are in fluid communication through one or more flow guide partition walls 3, and one end of each flow guide partition wall 3 is provided with a water through hole 31.
In a preferred embodiment, when two or more guide partition walls 3 are in fluid communication, the water through holes of adjacent guide partition walls are at opposite ends.
In a preferred embodiment, the system further comprises a return line 4, and the second membrane reaction zone 2 is in fluid communication with the first membrane reaction zone 1 via the return line 4.
In a preferred embodiment, the system further comprises a return pump 11, the return pump 11 being arranged on the return line 4.
In a preferred embodiment, the system further comprises a return valve 12, the return valve 12 being provided on the return line 4.
In a preferred embodiment, the system further comprises a first air supply duct unit 5 for providing air and/or oxygen, the first air supply duct unit 5 being in communication with the first membrane module 101.
In a preferred embodiment, the system further comprises a fan 13, said fan 13 being in communication with said first air supply duct unit 5.
In a preferred embodiment, the system further comprises a first air supply valve unit provided on the first air supply duct unit 5.
In a preferred embodiment, the first gas supply duct unit 5 includes a first gas supply first duct 51 and a first gas supply second duct 52, and the first gas supply first duct 51 and the first gas supply second duct 52 are respectively communicated with both ends of the first membrane module 101;
in a preferred embodiment, the system further comprises a first air supply valve unit comprising a first air supply first valve 141 and a first air supply second valve 142, the first air supply first valve 141 being disposed on the first air supply first pipeline 51, and the first air supply second valve 142 being disposed on the first air supply second pipeline 52.
In a preferred embodiment, the system further comprises a dissolved oxygen concentration detector 6 disposed within the first membrane reaction zone 1.
In a preferred embodiment, the system further comprises an aeration unit 7 disposed within the first membrane reaction zone 1.
In a preferred embodiment, the system further comprises a second gas supply duct unit 8 for supplying hydrogen, the second gas supply duct unit 8 being in communication with the second membrane module 201.
In a preferred embodiment, the system further comprises a gas generator 15, said gas generator 15 being in communication with said second gas supply duct unit 8.
In a preferred embodiment, the system further comprises a gas generating valve 17, and the gas generator 15 is in communication with the second gas supply duct unit 8 via the gas generating valve 17.
In a preferred embodiment, the system further comprises a second air supply valve unit provided on the second air supply duct unit 8.
In a preferred embodiment, the second air supply duct unit 8 includes a second air supply first duct 81 and a second air supply second duct 82, and the second air supply first duct 81 and the second air supply second duct 82 are respectively communicated with both ends of the second membrane module 201.
In a preferred embodiment, the system further comprises a second air supply valve unit, the second air supply valve unit comprises a second air supply first valve 161 and a second air supply second valve 162, the second air supply first valve 161 is disposed on the second air supply first pipeline 81, and the second air supply second valve 162 is disposed on the second air supply second pipeline 82.
In a preferred embodiment, the system further comprises a hydrogen concentration detector 9 disposed within the second membrane reaction zone 2.
In a preferred embodiment, the system further comprises a detector 10 for total nitrogen, ammonia nitrogen and nitrite nitrogen concentrations in the second membrane reaction zone 2. The detector can simultaneously detect the concentration of total nitrogen, ammonia nitrogen and nitrite nitrogen, and also can comprise three detection units for respectively detecting the concentration of total nitrogen, the concentration of ammonia nitrogen and the concentration of nitrite nitrogen.
In a preferred embodiment, the system further comprises a control unit 18 in signal connection with at least one selected from the group consisting of the dissolved oxygen concentration detector 6, the hydrogen concentration detector 9, the detector 10 for at least one concentration of total nitrogen, ammonia nitrogen, nitrate nitrogen and nitrite nitrogen, the reflux pump 11, the reflux valve 12, the first gas supply valve unit, the first gas supply first valve 141, the first gas supply second valve 142, the second gas supply valve unit, the second gas supply first valve 161 and the second gas supply second valve 162.
In a preferred embodiment, the system further comprises a water inlet 19 and a water outlet 20, wherein the water inlet 19 is arranged at the upper part of the first membrane reaction zone 1, and the water outlet 20 is arranged at the upper part of the second membrane reaction zone 2.
In a preferred embodiment, the system further comprises a weir 21, the weir 21 being in communication with the outlet 20.
When the system is used, a water body to be treated firstly flows through the first membrane reaction zone, microorganisms are attached to the carrier membrane in the first membrane component, air and/or oxygen is supplied to the air, the microorganisms are fully contacted with nitrogen-containing pollutants in sewage, the nitrogen-containing pollutants are firstly converted into ammonia nitrogen and then converted into nitrite nitrogen under the action of the microorganisms, and because the reduction rate of nitrite nitrogen (nitrite) in the second membrane reaction zone in the system is obviously higher than the oxidation rate of nitrite nitrogen (nitrite) in the first membrane reaction zone, the accumulation of nitrate nitrogen is hardly generated in the system. An online detector for the concentration of dissolved oxygen can be arranged in the first membrane reaction zone, the system automatically regulates and controls the air and/or oxygen supply pressure according to the detection result, and an aeration unit can be arranged in the first membrane reaction zone and used for periodically flushing the carrier membrane in the first membrane component.
Then, the treated water body flows through a second membrane reaction area, a carrier membrane in a second membrane component is attached with nano metal such as palladium, the supplied gas is hydrogen, nitrite nitrogen is quickly reduced into nitrogen under the catalysis of nano palladium/hydrogen, the nitrogen is discharged after the reaction is finished, a hydrogen concentration detector can be arranged in the second membrane reaction area, the hydrogen supply pressure can be dynamically regulated according to the real-time detection result, an on-line detector for total nitrogen, ammonia nitrogen and nitrite nitrogen concentration can be arranged, the denitrification effect of the system can be monitored in real time, and meanwhile, the system can dynamically regulate the ratio of the flow of the second membrane reaction area which flows back to the first membrane reaction area (the second membrane reaction area is in fluid communication with the first membrane reaction area through a backflow pipeline) to the inflow flow of the water body to be treated and the hydrogen supply pressure according to the detection result, so that the deep denitrification of the sewage can be quickly and effectively realized.
Compared with the conventional biological sewage treatment process, the system can realize that the total nitrogen pollutant removal rate of the treated sewage reaches 95 percent. The utility model has the advantages of the pollutant is got rid of effectually, easy and simple to handle, the energy consumption is low, can be used to solve the difficult problem that sewage treatment can't stabilize discharge to reach standard.
Example 1
The system for deep denitrification of sewage used in the embodiment is shown in figure 1 and specifically comprises the following steps:
(1) after being pretreated, the sewage is discharged into a sewage deep denitrification system from a water inlet 19 at the upper end of the first membrane reaction zone 1, and the total nitrogen concentration of the inlet water is 40 mg/L;
(2) the sewage enters a sewage deep denitrification system (microorganism/nano palladium coupling) for deep denitrification, firstly flows through a first membrane reaction zone 1, microorganisms on a carrier membrane are fully contacted with nitrogenous pollutants in the sewage and are subjected to membrane-based microorganism treatment, air is used as gas supply gas, the concentration of dissolved oxygen is 1.5mg/L, the gas supply pressure is 10psi, the hydraulic retention time is 8 hours, and the flushing aeration scouring strength is controlled to be 12L/(s.m.m)2) The flushing time is 4min, and the frequency is once per month; detecting the concentration of dissolved oxygen, and regulating and controlling the air supply pressure of air and/or oxygen: if the concentration of dissolved oxygen in the water body>Reducing the air and/or oxygen supply pressure by 2mg/L, wherein the gradient is reduced to 1psi, and if the concentration of the dissolved oxygen in the water body is less than or equal to 0.5mg/L, the air and/or oxygen supply pressure is increased, and the gradient is increased to 1 psi;
(3) sewage flows into a second membrane reaction zone 2 from three flow guide partition walls 3 and three water through holes 31 of a first membrane reaction zone 1, nitrite nitrogen in a water body obtained by membrane-based microbial treatment under the catalysis of nano palladium/hydrogen is rapidly reduced into nitrogen, the hydrogen supply pressure of the second membrane reaction zone is set to be 5psi, and the hydraulic retention time is 4 hours; detecting the hydrogen concentration, and regulating and controlling the hydrogen supply pressure: if the hydrogen detector can detect the hydrogen concentration, reducing the hydrogen supply pressure by 1 psi;
(4) refluxing part of supernatant of the water body obtained in the step 3) to the step 2) for membrane-based microbial treatment, wherein the ratio of the flow rate of the supernatant refluxed to the step 2) for membrane-based microbial treatment to the flow rate of sewage entering a sewage deep denitrification system is 5: 1, arranging an ammonia nitrogen and total nitrogen nitrite nitrogen on-line detector at the upper end of a second membrane reaction zone 2, and monitoring the denitrification effect of the system in real time; detecting the concentration of the nitrite nitrogen, and regulating the gas supply pressure of the hydrogen: under the condition of detecting that the hydrogen concentration is zero, if the nitrite nitrogen concentration is higher than 10mg/L, properly increasing the hydrogen supply pressure, and increasing the gradient to 0.5 psi; detecting the concentration of total nitrogen and ammonia nitrogen, regulating and controlling the ratio of the flow which flows back to the step 1) for membrane-based microbial treatment to the inflow flow of the water body to be treated: if the total nitrogen concentration is more than 10mg/L or the ammonia nitrogen concentration is more than 1.5mg/L, the ratio of the flow rate of the membrane-based microbial treatment in the step 1) and the inflow flow rate of the water body to be treated is increased, and the inflow flow rate of the water body to be treated is increased in a gradient manner by taking 0.5 time as the inflow flow rate. If the total nitrogen concentration is less than 5mg/L and the ammonia nitrogen concentration is less than 0.5mg/L, properly reducing the ratio of the flow returned to the step 1) for membrane-based microbial treatment to the inflow flow of the water body to be treated, and reducing the ratio in a gradient manner by taking 0.5 time of the inflow flow of the water body to be treated as a gradient;
(5) and (3) discharging effluent from an overflow weir, and measuring that the ammonia nitrogen concentration of the effluent is 0.5mg/L, the total nitrogen concentration is 2mg/L, and the total nitrogen removal rate is 95%.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (11)
1. A system for deep denitrification of wastewater, comprising:
the device comprises a first membrane reaction zone (1) for carrying out membrane-based microbial treatment on a water body to be treated, wherein a first membrane assembly (101) is arranged in the first membrane reaction zone (1); a carrier membrane attached microorganism in the first membrane module (101);
a second membrane reaction zone (2) for reducing nitrite nitrogen in the water body obtained by the membrane-based microorganism treatment into nitrogen, wherein a second membrane module (201) is arranged in the second membrane reaction zone (2); the carrier film in the second membrane component (201) is attached with nano metal;
the second membrane reaction zone (2) is in fluid communication with the first membrane reaction zone (1).
2. The system for deep denitrification of wastewater according to claim 1, further comprising one of the following technical features:
1) the first membrane reaction zone (1) and the second membrane reaction zone (2) are in fluid communication through a communication conduit;
2) the first membrane reaction zone (1) and the second membrane reaction zone (2) are communicated with each other through more than one flow guide partition wall (3), and one end of each flow guide partition wall (3) is provided with a water through hole (31);
3) the system further comprises a return conduit (4), the second membrane reaction zone (2) being in fluid communication with the first membrane reaction zone (1) via the return conduit (4);
4) the system further comprises a first air supply duct unit (5) for providing air and/or oxygen, the first air supply duct unit (5) being in communication with the first membrane module (101);
5) the system further comprises a dissolved oxygen concentration detector (6) disposed within the first membrane reaction zone (1);
6) the system also comprises an aeration unit (7) arranged in the first membrane reaction zone (1);
7) the system further comprises a second gas supply duct unit (8) for supplying hydrogen, the second gas supply duct unit (8) being in communication with the second membrane module (201);
8) the system further comprises a hydrogen concentration detector (9) disposed within the second membrane reaction zone (2);
9) the system also comprises a detector (10) for the concentration of total nitrogen, ammonia nitrogen and nitrite nitrogen in the second membrane reaction zone (2).
3. The system for deep denitrification of sewage according to claim 2, wherein in the step 2), when two or more guide partitions (3) are in fluid communication, the water passing holes of the adjacent guide partitions are at the opposite ends.
4. The system for deep denitrification of wastewater according to claim 2, further comprising at least one of the following technical features:
31) in the characteristic 3), the system further comprises a reflux pump (11), and the reflux pump (11) is arranged on the reflux pipeline (4);
32) in the characteristic 3), the system further comprises a return valve (12), and the return valve (12) is arranged on the return pipeline (4);
41) in the characteristic 4), the system further comprises a fan (13), and the fan (13) is communicated with the first air supply pipeline unit (5);
42) in the feature 4), the system further comprises a first air supply valve unit, and the first air supply valve unit is arranged on the first air supply pipeline unit (5);
43) in the feature 4), the first gas supply duct unit (5) includes a first gas supply first duct (51) and a first gas supply second duct (52), and the first gas supply first duct (51) and the first gas supply second duct (52) are respectively communicated with both ends of the first membrane module (101);
71) in feature 7), the system further comprises a gas generator (15), wherein the gas generator (15) is communicated with the second gas supply pipeline unit (8);
72) in feature 7), the system further comprises a second air supply valve unit, the second air supply valve unit being provided on the second air supply duct unit (8);
73) in the characteristic 7), the second gas supply duct unit (8) includes a second gas supply first duct (81) and a second gas supply second duct (82), and the second gas supply first duct (81) and the second gas supply second duct (82) are respectively communicated with both ends of the second membrane module (201).
5. The system for deep denitrification of wastewater according to claim 4, characterized in that 43), the system further comprises a first air supply valve unit comprising a first air supply first valve (141) and a first air supply second valve (142), the first air supply first valve (141) being disposed on the first air supply first pipe (51), and the first air supply second valve (142) being disposed on the first air supply second pipe (52).
6. The system for the deep denitrification of sewage according to claim 4, characterized in that 71), the system further comprises a gas generation valve (17), and the gas generator (15) is communicated with the second gas supply duct unit (8) through the gas generation valve (17).
7. The system for deep denitrification of wastewater as set forth in claim 4, wherein in feature 73), the system further comprises a second air supply valve unit comprising a second air supply first valve (161) and a second air supply second valve (162), the second air supply first valve (161) being disposed on the second air supply first conduit (81), the second air supply second valve (162) being disposed on the second air supply second conduit (82).
8. The system for deep denitrification of wastewater according to claim 5, further comprising a control unit (18) signally connected to at least one selected from the group consisting of the dissolved oxygen concentration detector (6), the hydrogen concentration detector (9), the total nitrogen, ammonia nitrogen and nitrite nitrogen concentration detector (10), the reflux pump (11), the reflux valve (12), the first gas supply valve unit, the first gas supply first valve (141), the first gas supply second valve (142).
9. The system for deep denitrification of wastewater according to claim 7, further comprising a control unit (18) signally connected to at least one selected from the group consisting of the dissolved oxygen concentration detector (6), the hydrogen concentration detector (9), the total nitrogen, ammonia nitrogen and nitrite nitrogen concentration detector (10), the reflux pump (11), the reflux valve (12), the second gas supply valve unit, the second gas supply first valve (161) and the second gas supply second valve (162).
10. The system for deep denitrification of wastewater according to claim 1, further comprising a water inlet (19) and a water outlet (20), wherein the water inlet (19) is disposed at an upper portion of the first membrane reaction zone (1), and the water outlet (20) is disposed at an upper portion of the second membrane reaction zone (2).
11. The system for deep denitrification of wastewater according to claim 10, further comprising a weir (21), wherein the weir (21) is in communication with the water outlet (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022391128.9U CN214457138U (en) | 2020-10-23 | 2020-10-23 | System for sewage degree of depth denitrogenation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022391128.9U CN214457138U (en) | 2020-10-23 | 2020-10-23 | System for sewage degree of depth denitrogenation |
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| CN214457138U true CN214457138U (en) | 2021-10-22 |
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| CN202022391128.9U Active CN214457138U (en) | 2020-10-23 | 2020-10-23 | System for sewage degree of depth denitrogenation |
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2020
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