CN205241467U - Self -circulation biomembrane denitrogenation sewage treatment device - Google Patents

Abstract

A self-circulating biofilm denitrification sewage treatment equipment, related to the field of sewage treatment, including an outer shell, an aeration device, an aerobic packing area, an anoxic packing area and MBR membrane modules, the aeration device is arranged at the bottom of the outer shell, good The oxygen filling area is set above the aeration device, the MBR membrane module is set above the aerobic filling area, the MBR membrane module is surrounded by baffles, the top of the baffle is provided with water holes, and the anoxic membrane is installed between the baffle and the outer shell. Packing bracket, the anoxic packing bracket is covered with anoxic packing, for the treatment of COD, ammonia nitrogen and the removal of suspended sludge in sewage treatment, the three treatment units are miniaturized to form a complete water treatment cycle At the same time, the principle of density difference is used to form a hydraulic circulation, which reduces energy consumption. At the same time, the water quality also meets high standards, the structure design is reasonable, and the space utilization rate is high.

Description

A self-circulating biofilm denitrification sewage treatment equipment

technical field

The utility model relates to the field of sewage treatment, in particular to a self-circulating biofilm denitrification sewage treatment equipment.

Background technique

If the traditional sewage treatment process wants to simultaneously treat COD, ammonia nitrogen and remove suspended sludge, at least three treatment units are required to achieve it, namely aerobic COD removal, anoxic denitrification, and secondary sedimentation tank removal of suspended sludge. In addition, denitrification requires reflux, which not only increases the energy consumption of the system, but also complicates the treatment process, increases the number of treatment units, and increases the floor area, and is not easy to manage and operate.

At present, the development trend of sewage treatment technology is integration and miniaturization, low energy consumption and high water quality.

Membrane bioreactor (MBR) is a new water treatment technology that combines membrane separation unit and biological treatment unit. As the core component of the membrane bioreactor, the MBR membrane module replaces the secondary settling tank with the MBR membrane module, which can remove the suspended sludge more effectively and conveniently.

Utility model content

Aiming at the requirements of miniaturization, low energy consumption and high water quality for sewage treatment at the current stage of sewage treatment process, a self-circulating biofilm denitrification sewage treatment equipment is provided to solve the above problems.

The technical scheme that the utility model solves its technical problem to take is:

A self-circulating biofilm denitrification sewage treatment equipment, including an outer casing, is characterized in that it also includes an aeration device, an aerobic packing area, an anoxic packing area and an MBR membrane module,

The aeration device is arranged at the bottom of the outer casing, the aerobic packing area is arranged above the aeration device, and an MBR membrane module is arranged above the aerobic packing area, and the MBR membrane module is surrounded by an oxygen barrier for isolating hypoxia. The baffle plate in the filling area, the top of the baffle plate is provided with a water passage hole through which the MBR membrane module communicates with the anoxic packing area, and an anoxic packing support is arranged between the baffle plate and the outer shell, and the anoxic packing support It is covered with anoxic filler.

Further, a baffle for collecting air and separating the aerobic packing area from the anoxic packing area is provided between the aeration device and the aerobic packing area.

Further, a conical baffle to reduce sludge adhesion is provided between the aerobic packing area and the MBR membrane module.

Further, the oxygen-deficient filler area is evenly distributed in a ring with the MBR membrane module as the center.

Further, the aerobic filler area is evenly distributed in a ring with the MBR membrane module as the center.

Further, the aeration device is evenly distributed under the aerobic packing area.

Further, the outer casing is provided with water inlet pipes, and the water inlet pipes are distributed symmetrically.

Further, several exhaust holes are provided on the top of the outer casing.

Further, the outer casing is made of carbon steel for anticorrosion or stainless steel; the aerobic filler and the anoxic filler are combined fillers, and the material is PP+formylated silk; the membrane module in the MBR membrane module is made of PVDF , the aerator head is made of diaphragm type EPDM or rubber.

The beneficial effects of the utility model are:

This utility model has miniaturized treatment for the three treatment units of COD, ammonia nitrogen and suspended sludge removal in sewage treatment, so that it forms a complete water treatment cycle. At the same time, it uses the principle of density difference to form a A hydraulic circulation is formed, which reduces energy consumption. At the same time, the water quality meets high standards, the structure design is reasonable, and the space utilization rate is high. There are evenly distributed aeration heads under the aerobic filling area, which can provide sufficient air source for aerobic microorganisms; there is also a first conical baffle under the central baffle, on the one hand, it can make the lower aeration head The released air is concentrated in the middle, which is convenient for providing oxygen for aerobic microorganisms. On the other hand, it can increase the pressure of the sewage flowing down from the anoxic packing area, and form a pressure difference with the aerobic packing area, which is convenient for hydraulic circulation. ; There is an MBR membrane module above the aerobic filling area, which can play the role of mud-water separation; in order to isolate the anoxic filling area from the MBR membrane module, a central baffle is set between the two; to ensure the hydraulic power of the entire equipment Circulation, so that the MBR membrane module is connected with the anoxic packing area, and a water hole is reserved on the upper part of the central baffle; a second conical baffle is set between the MBR membrane module and the aerobic packing area, on the one hand, it can The water flow converges to the MBR membrane module, where a certain pressure difference is generated. On the other hand, due to the design of the conical shape, it can reduce the sludge from adhering to the MBR membrane, and it is easier to fall back to the aerobic packing area under the impact of the water flow. .

Description of drawings

Fig. 1 is a vertical sectional view of the utility model;

Fig. 2 is the plane sectional view of the utility model;

Fig. 3 is the hydraulic cycle figure of the utility model;

Fig. 4 is the distribution diagram of functional areas of the present utility model;

Fig. 5 is a vertical sectional view of the second embodiment of the present invention.

In the figure: 1-aeration device, 2-outer casing, 3-central baffle, 31-first conical baffle, 32-second conical baffle, 4-support, 41-anoxic filler support, 42 -Aerobic packing bracket, 5-Anoxic packing area, 6-Water inlet pipe, 7-Water outlet hole, 8-Exhaust hole, 9-Water outlet pipe, 10-MBR membrane module, 11-Aerobic packing area.

detailed description

Embodiment one

As shown in FIGS. 1 to 4 , a self-circulating biofilm denitrification sewage treatment equipment includes an outer casing 2 , an aeration device 1 , an aerobic packing area 11 , an anoxic packing area 5 and an MBR membrane module 10 .

In this example. The outer casing 2 is a vertically placed steel cylindrical tank body, and can also be other regular-shaped tank bodies, such as cubes, cuboids, and the like.

An aeration device 1 is arranged at the inner bottom of the outer shell 2. The air source of the aeration device 1 comes from a Roots blower. The aeration device 1 includes an aeration head arranged at the bottom of the tank, and the aeration heads are evenly arranged. In the lower part of the aerobic packing area 11, this can provide sufficient air source for the aerobic microorganisms.

The aerobic filler area 11 is arranged above the aeration device 1, and this part of the aerobic filler is hung on the aerobic filler bracket 42, and the aerobic filler bracket 42 is fixed on the central baffle 3, and the central baffle 3. There is also a first conical baffle 31 below. The setting of the first conical baffle 31 can, on the one hand, concentrate the air released from the aeration head below in the middle, so as to provide oxygen for aerobic microorganisms. On the other hand, The pressure of the sewage flowing down from the anoxic packing area 5 can be increased here to form a pressure difference with the aerobic packing area 11 to facilitate hydraulic circulation.

An MBR membrane module 10 is arranged above the aerobic packing area 11, which can play the role of mud-water separation. The MBR membrane module 10 is connected with a water outlet pipe 9, and the water outlet pipe 9 is connected with a self-priming pump for discharging the treated water.

With the MBR membrane module 10 as the center, brackets 4 are arranged around and at the bottom, the brackets 4 include anoxic filler brackets 41 and aerobic filler brackets 42, and an aerobic filler bracket 42 is arranged below the MBR membrane module 10, The aerobic filler is suspended and fixed on the aerobic filler bracket 42; the MBR membrane module 10 is provided with anoxic filler bracket 41 around it, and in order to isolate the anoxic filler area and the MBR membrane module 10, between the two A central baffle 3 is provided.

In order to ensure the hydraulic circulation of the whole equipment, the MBR membrane module 10 is connected with the anoxic packing area 5, and the water hole 7 is reserved on the upper part of the central baffle plate 3.

When there is a lot of air accumulated in the upper part of the device, in order to avoid pressure imbalance, an exhaust hole 8 is arranged on the top of the outer casing 2 of the device. Water inlet pipes 6 are also arranged on the upper part of the outer casing 2, and are symmetrically distributed on the upper part of the outer casing 2 in consideration of uniform water distribution.

An anoxic filler bracket 41 is arranged between the outer casing 2 and the central baffle 3 , and this area is the anoxic filler area 5 , and anoxic filler is hung and fixed on the anoxic filler bracket 41 .

As shown in Figure 2, it is a planar sectional view of the sewage treatment plant; with the MBR membrane module 10 as the center, an annular support 4 is arranged around it, fillers are suspended on the support 4, and aerobic support is provided below the MBR membrane module 10. The packing area 11 is provided with an aeration device 1 under the aerobic packing area 11 , and the aeration heads of the aeration device 1 are evenly distributed under the aerobic packing area 11 with the MBR membrane module 10 as the center.

As shown in Figure 3 and Figure 4, in the process of hydraulic cycle, due to the existence of the aeration zone, the air continuously enters, and the density of this part is lower than that of the surrounding area without aeration, forming a density difference. Under the driving force, the sewage is continuously collected from the anoxic filling area to the aeration area, and driven by the air lift and hydraulic circulation, it continues to pass through the aerobic filling area. After the pollutants in the sewage are treated by aerobic microorganisms, they pass through the MBR. Due to the mud-water separation effect of the membrane module 10, the clean water continues upwards, while the sludge is retained. Under the action of backwash, the sludge trapped by the MBR membrane module 10 will fall back to the filler in the aerobic packing area 11, while part of the clean water is automatically The suction pump sucks it away, and part of it returns to the anoxic zone and the newly entered sewage through the water tunnel, repeating the previous process.

Embodiment two

As shown in Figure 5, the difference from Embodiment 1 is that a second conical baffle 32 is provided between the MBR membrane module 10 and the aerobic packing area 11, and the second conical baffle 32 passes through the The design, on the one hand, can converge the water flow to the MBR membrane module 10, where a certain pressure difference is generated; on the other hand, due to the design of the conical shape, it can reduce the sludge from adhering to the MBR membrane, and it is more effective under the impact of the water flow. Easy fall back to aerobic fill zone 11.

Working mode, the operation of the self-circulating biofilm denitrification sewage treatment equipment includes two parts. The first part is the continuous circulation of sewage in the system. The sewage enters the interior of the equipment from the water inlet 6, and after this part of sewage enters the anaerobic packing area 5 Continue to flow downward, because the existence of aeration zone 1 causes air to enter, the density of this part is lower than the density of the anaerobic packing zone 5 where no gas enters on both sides, due to the effect of density difference, the sewage on both sides flows to the middle, so A hydrodynamic circulation is formed, as shown in Figure 3.

The second part is the intermittent water inlet and drainage of the system. The system controls the water inlet through the program, and stops the water inlet during backwashing; the outlet water needs to be treated by the MBR membrane module, and the MBR membrane module needs to be backwashed every time it runs for a period of time. It restores the filtration function, and the MBR membrane module drains water through the self-priming pump during operation, so the water output of the system is intermittent. The operation of the MBR system is divided into the following stages with a cycle of 30 minutes:

1. System operation stage: At this time, the water inlet pump is turned on, the backwash pump is turned off, the self-priming pump is turned on, and the system enters and exits water for 13 minutes.

2. Membrane relaxation stage: At this time, the water inlet pump is turned on, the backwash pump is turned off, the self-priming pump is turned off, and the system enters water,

3. Repeat the first phase.

4. Repeat the second stage for 0.5 min.

5. Backwash stage: At this time, the water inlet pump is turned off, the backwash pump is turned on, the self-priming pump is turned off, the system does not enter water, no water comes out, and the water is backwashed for 1 minute.

6. Repeat the fourth phase.

The water inlet pump is connected with the water inlet pipe 6, and is used for entering equipment for sewage, and the backwash pump is used for backwashing the MBR membrane module 10 to remove the sludge retained by the MBR membrane, and the self-priming pump is connected with the The outlet pipe 9 is connected to discharge the treated water out of the equipment.

Except for the technical features described in the description, all are known technologies by those skilled in the art.

Claims (9)

1. A self-circulating biofilm denitrification sewage treatment equipment, including an outer shell, is characterized in that it also includes an aeration device, an aerobic packing area, an anoxic packing area and an MBR membrane module, The aeration device is arranged at the bottom of the outer shell, the aerobic packing area is arranged above the aeration device, an MBR membrane module is arranged above the aerobic packing area, and surroundings of the MBR membrane module are arranged to isolate hypoxia The baffle plate in the filling area, the top of the baffle plate is provided with a water passage hole through which the MBR membrane module communicates with the anoxic packing area, and an anoxic packing support is arranged between the baffle plate and the outer shell, and the anoxic packing support It is covered with anoxic filler. 2. A kind of self-circulating biofilm denitrification sewage treatment equipment according to claim 1, characterized in that, between the aeration device and the aerobic packing area, there is a device for gathering air, and the aerobic packing area and the aerobic packing area Baffles separating the anoxic fill zone. 3. A self-circulating biofilm denitrification sewage treatment equipment according to claim 2, characterized in that a conical baffle to reduce sludge adhesion is provided between the aerobic packing area and the MBR membrane module. 4. A self-circulating biofilm denitrification sewage treatment equipment according to claim 1, characterized in that, the anoxic filler area is evenly distributed in a ring with the MBR membrane module as the center. 5. A self-circulating biofilm denitrification sewage treatment equipment according to claim 1, characterized in that, the aerobic filler area is evenly distributed in a ring with the MBR membrane module as the center. 6. A self-circulating biofilm denitrification sewage treatment equipment according to claim 5, characterized in that the aeration device is evenly distributed under the aerobic filling area. 7. A self-circulating biofilm denitrification sewage treatment equipment according to claim 1, characterized in that, the outer casing is provided with water inlet pipes, and the water inlet pipes are symmetrically distributed. 8 . The self-circulating biofilm denitrification sewage treatment equipment according to claim 7 , wherein a number of vent holes are arranged on the top of the outer shell. 9. A kind of self-circulating biofilm denitrification sewage treatment equipment according to claim 1, characterized in that, the outer casing is made of carbon steel for anticorrosion or stainless steel; the aerobic filler and anoxic filler are The combined filler is made of PP+formaldehyde silk; the membrane module in the MBR membrane module is made of PVDF, and the aeration head is made of diaphragm type EPDM or rubber.