CN218665566U

CN218665566U - A high-efficient denitrification facility of stabilizing for high salt waste water treatment that contains

Info

Publication number: CN218665566U
Application number: CN202223168514.7U
Authority: CN
Inventors: 樊剑潇; 吴冬飞; 李瑞鹏; 崔正盼; 庄丽
Original assignee: Jiangsu Quanzhiyuan Environmental Technology Co ltd
Current assignee: Jiangsu Quanzhiyuan Environmental Technology Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-03-21
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a denitrification facility is stabilized to high efficiency for high salt waste water treatment that contains, the device include oxygen deficiency pond, good oxygen pond, MBR pond and two heavy ponds, the oxygen deficiency pond is equipped with C source dosing pump and dissolves the oxygen appearance on line, be equipped with aeration agitating unit in the good oxygen pond to be equipped with mixed liquid backwash pump and dissolve the oxygen appearance on line, wherein mix the export of liquid backwash pump and pass through pipe connection in the oxygen deficiency pond, be equipped with the MBR membrane group in the MBR pond to be equipped with level sensor and sludge reflux pump, two heavy ponds also are equipped with the sludge reflux pump, and the export of two sludge reflux pumps passes through in pipe connection to the anterior segment in oxygen deficiency pond. The utility model discloses control is stable, easy and simple to handle, adds the medicine point position and adds the medicine volume through the control backward flow ratio that becomes more meticulous, C source in high salt high nitrogen waste water treatment, coordinates multiple spot dissolved oxygen parameter control to and through the mode of parallelly connected MBR membrane system and two heavy ponds, ensure that total nitrogen in the high salt waste water is stable to be got rid of.

Description

A high-efficient denitrification facility of stabilizing for high salt waste water treatment that contains

Technical Field

The utility model belongs to the technical field of water treatment, concretely relates to denitrification facility is stabilized to high efficiency for high salt waste water treatment that contains.

Background

A high-efficiency stable denitrification device in the field of high-salinity wastewater treatment is common equipment and is mainly used for removing total nitrogen in high-salinity wastewater, such as the conditions of tin stripping in PCB industry, high conductivity of raw water in wastewater stripping hanging wastewater, high total nitrogen and the like. The current denitrification of high-salinity wastewater mainly has the following problems:

(1) No internal reflux exists in the anoxic tank, the retention time of wastewater in the anoxic tank is short, and the denitrification efficiency is influenced;

(2) The control difficulty of the local dissolved oxygen concentration of the anoxic pond is high, and denitrifying bacteria are difficult to become dominant strains in quantity, so that the denitrification efficiency is influenced;

(3) The original addition of C in the anoxic tank is not uniform, and the activities of denitrifying bacteria in the anoxic tank are different, so that the denitrification efficiency is influenced;

(4) When the MBR membrane is not configured, the solid-liquid separation effect of the secondary sedimentation tank cannot be stably ensured due to the poor tail end water sedimentation effect after denitrification of the high-salinity wastewater;

(5) When a secondary sedimentation tank is not configured and a large amount of activated sludge is dead (such as the quality of raw water exceeds the standard or a sludge domestication stage), the MBR membrane is easy to be polluted and blocked, so that the system cannot normally operate;

(6) When the secondary sedimentation tank is not configured and the MBR membrane is subjected to off-line cleaning, the system cannot normally operate, and the production line production time is stopped (the time for cleaning the MBR membrane off-line generally needs more than 24 h).

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a denitrification facility is stabilized to high efficiency for high salt waste water treatment that contains to overcome the not enough of above-mentioned prior art existence.

The utility model adopts the technical proposal that: the utility model provides a denitrification facility is stabilized to high efficiency for high salt waste water treatment, the device include oxygen deficiency pond, good oxygen pond, two heavy ponds, mix liquid backwash pump, mud backwash pump, aeration agitating unit, dissolve oxygen appearance and C source dosing pump on line, oxygen deficiency pond, good oxygen pond, two heavy ponds communicate the setting each other in proper order, the import in oxygen deficiency pond inserts waste water to the oxygen deficiency pond is equipped with C source dosing pump and dissolves the oxygen appearance on line, be equipped with aeration agitating unit in the good oxygen pond to good oxygen pond is equipped with and mixes liquid backwash pump and dissolve oxygen appearance on line, mix the import of liquid backwash pump insert in good oxygen pond, the export is passed through in pipe connection to oxygen deficiency pond anterior segment, two heavy ponds are equipped with first mud backwash pump, the import of first mud backwash pump inserts two heavy pond bottoms, the export is passed through pipe connection to in the oxygen deficiency pond anterior segment.

Furthermore, the anoxic tank is divided into a plurality of sections, and each section of tank is separately provided with a C source dosing pump and an online dissolved oxygen instrument.

Further, the oxygen deficiency pond includes two sections, is first oxygen deficiency pond and second oxygen deficiency pond respectively, first oxygen deficiency pond is equipped with first C source dosing pump and first online dissolved oxygen appearance, the second oxygen deficiency pond is equipped with second C source dosing pump, online dissolved oxygen appearance of second and reflux pump in the oxygen deficiency, the import of reflux pump is inserted in the second oxygen deficiency pond, export is passed through pipe connection to in the first oxygen deficiency pond.

Furthermore, a third online dissolved oxygen meter and an aeration stirring device are installed in the aerobic tank, and the gas supply amount of the aeration stirring device is adjusted through the parameters of the third online dissolved oxygen meter, so that the dissolved oxygen parameters in the aerobic tank are adjusted.

Further, the good oxygen pond is equipped with two mixed liquid backwash pumps, is first mixed liquid backwash pump and second mixed liquid backwash pump respectively, the export of first mixed liquid backwash pump passes through the pipe connection to in the first oxygen deficiency pond, the export of second mixed liquid backwash pump passes through the pipe connection to in the second oxygen deficiency pond.

Further, an MBR tank is arranged between the aerobic tank and the secondary sedimentation tank, and an MBR membrane group is arranged in the MBR tank.

Furthermore, an outlet of the MBR membrane group is connected with a water outlet pump, an outlet of the water outlet pump is used as a first wastewater outlet, and an outlet at the upper part of the secondary sedimentation tank is used as a second wastewater outlet.

Furthermore, the MBR tank is provided with a liquid level sensor and a second sludge reflux pump, and the inlet of the second sludge reflux pump is connected to the bottom of the MBR tank, and the outlet of the second sludge reflux pump is connected to the front section of the anoxic tank through a pipeline.

Furthermore, the reflux amount of the first sludge reflux pump and the second sludge reflux pump is adjusted between 0.5 and 1Q.

Further, the reflux quantity of the anoxic internal reflux pump is adjusted between 1 and 2Q; the mixed liquid reflux quantity of the mixed liquid reflux pump is adjusted between 0.5 and 1Q.

Further, the concentration of dissolved oxygen in the anoxic tank (1) is between 0.2 and 0.5 mg/L; the concentration of dissolved oxygen in the aerobic tank is between 2 and 6 mg/L.

The beneficial effects of the utility model are that: this device is under high salt waste water restraines biochemical treatment system's prerequisite, on the one hand through meticulous control reflux ratio, C source add medicine point position and add the medicine volume, cooperation multiple spot dissolved oxygen parameter monitoring, the most probable provides optimal environment for microorganism growth breeds, ensures that total nitrogen in the high salt waste water is stably got rid of. On the other hand, the system is switched according to the actual wastewater condition by connecting the secondary sedimentation tank and the MBR membrane system in parallel, so that the long-term and stable operation of the system is ensured while the solid-liquid separation effect is ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Labeled in the figure as: 1-a first anoxic tank, 2-a second anoxic tank, 3-an aerobic tank, 4-a secondary sedimentation tank, 5-an MBR tank, 6-a first C source dosing pump, 7-a first online dissolved oxygen instrument, 8-a second C source dosing pump, 9-a second online dissolved oxygen instrument, 10-an anoxic internal reflux pump, 11-a first mixed liquid reflux pump, 12-a second mixed liquid reflux pump, 13-a third online dissolved oxygen instrument, 14-an aeration stirring device, 15-an MBR membrane group, 16-a liquid level sensor, 17-a water outlet pump, 18-a first sludge reflux pump and 19-a second sludge reflux pump.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example one

A high-efficiency stable denitrification device for treating high-salt-content wastewater mainly comprises an anoxic tank, an aerobic tank 3 and a secondary sedimentation tank 4, wherein the anoxic tank is divided into two sections and comprises a first anoxic tank 1 and a second anoxic tank 2, the first anoxic tank 1 is provided with a first C source dosing pump 6 and a first online dissolved oxygen instrument 7, the second anoxic tank 2 is provided with a second C source dosing pump 8, a second online dissolved oxygen instrument 9 and an anoxic internal reflux pump 10, the inlet of the anoxic internal reflux pump 10 is connected into the second anoxic tank 2, and the outlet of the anoxic internal reflux pump is connected into the first anoxic tank 1 through a pipeline; an aeration stirring device 14 is arranged in the aerobic tank 3, and is provided with a first mixed liquid reflux pump 11, a second mixed liquid reflux pump 12 and a third online dissolved oxygen instrument 13, wherein the outlet of the first mixed liquid reflux pump 11 is connected into the first anoxic tank 1 through a pipeline, and the outlet of the second mixed liquid reflux pump 12 is connected into the second anoxic tank 2 through a pipeline; the secondary sedimentation tank 4 is provided with a first sludge reflux pump 18, and an inlet of the first sludge reflux pump 18 is connected to the bottom of the secondary sedimentation tank 4, and an outlet of the first sludge reflux pump is connected into the first anoxic tank 1 through a pipeline.

In the embodiment, the anoxic tank is divided into two sections, the residence time of each section is not more than 12 hours, and basic conditions are provided for finely controlling the operation parameters in the anoxic tank. And each section in the anoxic tank is independently provided with a C source dosing pump, the dosing amount is respectively adjusted according to the difference of the total nitrogen value in each section of the tank body, the C: N in the sewage in each section of the anoxic tank is not less than 5 (the C and N parameters in the sewage are obtained by detecting COD and total nitrogen by taking a water sample, and the dosing amount is calculated according to the original C and N parameters and C: N in the sewage).

In this embodiment, the second anoxic tank 2 is provided with an anoxic internal reflux pump 10 for refluxing the back-end wastewater to the front end, and the reflux amount can be adjusted between 1 and 2Q (Q = system design water inflow). A third online dissolved oxygen instrument 13 and an aeration stirring device 14 are arranged in the aerobic tank 3, the air supply amount of the aeration stirring device 14 is adjusted through the parameters of the third online dissolved oxygen instrument 13, the dissolved oxygen parameters in the aerobic tank are adjusted, and finally the dissolved oxygen concentration in the aerobic tank is controlled to be between 2 and 6 mg/L. Meanwhile, the mixed liquid reflux pump in the aerobic tank 3 reflows the waste water at the rear end of the aerobic tank to each section of the anoxic tank, the reflux flow of each section can be independently adjusted, the reflux amount of the mixed liquid can be adjusted between 0.5 and 1Q, each section in the anoxic tank is independently provided with one set of online dissolved oxygen meter, the real-time dissolved oxygen content in each section of tank is monitored during use, guidance is provided for the flow adjustment of the reflux pump and the mixed liquid reflux pump in the anoxic tank, and finally the dissolved oxygen concentration in each section of anoxic tank is controlled to be between 0.2 and 0.5 mg/L.

Example two

On the basis of the first embodiment, an MBR tank 5 is added, specifically, the MBR tank 5 is arranged between the aerobic tank 4 and the secondary sedimentation tank 4, an MBR membrane group 15 is arranged in the MBR tank 5, an outlet of the MBR membrane group 15 is connected with a water outlet pump 17, an outlet of the water outlet pump 15 serves as a first wastewater outlet (route 1 wastewater outlet), and an upper outlet of the secondary sedimentation tank 4 serves as a second wastewater outlet (route 2 wastewater outlet).

In this embodiment, the MBR tank 5 is further equipped with a liquid level sensor 16 and a second sludge reflux pump 19, and an inlet of the second sludge reflux pump 19 is connected to the bottom of the MBR tank 5, and an outlet of the second sludge reflux pump is connected to the first anoxic tank 1 through a pipeline.

In the embodiment, an MBR (membrane bioreactor) tank is added to form two water outlet routes, wherein the first wastewater treatment route is water outlet after wastewater is treated by an anoxic tank, an aerobic tank, an MBR tank and an MBR module; and the second wastewater treatment line is that the wastewater is treated by an anoxic tank, an aerobic tank, an MBR tank and a secondary sedimentation tank and then is discharged.

In operation, when the system is in normal operation (the sludge concentration of the activated sludge is between 15 and 25 percent, the activated sludge activity is strong, and the dead sludge is less), the wastewater is treated according to the first route and then is discharged; when the system is not normally operated (the sludge concentration of the activated sludge is more than 35 percent or more dead sludge is generated, or the MBR membrane is cleaned off line), the wastewater is treated according to the second route and then is discharged.

In this embodiment, a second sludge reflux pump 19 is disposed in the MBR tank 5, and is used for refluxing the activated sludge in the MBR tank 5 to the front end of the anoxic tank, and the reflux amount can be adjusted between 0.5 and 1Q; a first sludge reflux pump 18 arranged in the secondary sedimentation tank 4 refluxes the activated sludge in the secondary sedimentation tank 4 to the front end of the anoxic tank, and the reflux quantity can be adjusted between 0.5 and 1Q.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the scope of the present invention in any way, and all technical solutions obtained by using equivalent substitution modes and the like fall within the scope of the present invention.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

Claims

1. The utility model provides a denitrification facility is stabilized to high efficiency for high salt waste water treatment, its characterized in that, the device include oxygen deficiency pond, good oxygen pond, two sink ponds, mix liquid backwash pump, mud backwash pump, aeration stirring device, dissolve oxygen appearance and C source with medicine pump on line, oxygen deficiency pond, good oxygen pond, two sink ponds communicate the setting each other in proper order, the import in waste water of oxygen deficiency pond to the oxygen deficiency pond is equipped with C source with medicine pump and dissolves the oxygen appearance on line, be equipped with aeration stirring device in the good oxygen pond to good oxygen pond is equipped with mixed liquid backwash pump and dissolves the oxygen appearance on line, the import of mixed liquid backwash pump inserts in good oxygen pond, the export is passed through the pipe connection and is in the oxygen deficiency pond, two sink ponds are equipped with first mud backwash pump, the import of first mud backwash pump inserts two sink pond bottom, the export is passed through the pipe connection to in the oxygen deficiency pond anterior segment.

2. The device of claim 1, wherein the anoxic tank is divided into a plurality of sections, and each section of the tank is separately provided with a C-source dosing pump and an online dissolved oxygen meter.

3. The high-efficiency stable denitrification device for the treatment of the wastewater with high salt content according to claim 1 or 2, wherein the anoxic tank comprises two sections, namely a first anoxic tank and a second anoxic tank, the first anoxic tank is provided with a first C-source dosing pump and a first online dissolved oxygen meter, the second anoxic tank is provided with a second C-source dosing pump, a second online dissolved oxygen meter and an anoxic internal reflux pump, and an inlet of the anoxic internal reflux pump is connected into the second anoxic tank, and an outlet of the anoxic internal reflux pump is connected into the first anoxic tank through a pipeline.

4. The device of claim 1, wherein a third online dissolved oxygen meter and an aeration stirring device are installed in the aerobic tank, and the gas supply amount of the aeration stirring device is adjusted according to the parameters of the third online dissolved oxygen meter, so as to adjust the parameters of dissolved oxygen in the aerobic tank.

5. The device of claim 3, wherein the aerobic tank is equipped with two mixed liquor reflux pumps, namely a first mixed liquor reflux pump and a second mixed liquor reflux pump, the outlet of the first mixed liquor reflux pump is connected to the first anoxic tank through a pipeline, and the outlet of the second mixed liquor reflux pump is connected to the second anoxic tank through a pipeline.

6. The device of claim 1, wherein an MBR tank is arranged between the aerobic tank and the secondary sedimentation tank, an MBR membrane group is arranged in the MBR tank, an outlet of the MBR membrane group is connected with a water outlet pump, an outlet of the water outlet pump is used as a first wastewater outlet, and an upper outlet of the secondary sedimentation tank is used as a second wastewater outlet.

7. The device of claim 6, wherein the MBR tank is equipped with a liquid level sensor and a second sludge reflux pump, the inlet of the second sludge reflux pump is connected to the bottom of the MBR tank, and the outlet of the second sludge reflux pump is connected to the front section of the anoxic tank through a pipeline.