CN216837551U - Integrated deep nitrogen and phosphorus removal device - Google Patents

Abstract

The utility model relates to a sewage treatment field discloses an integration degree of depth nitrogen and phosphorus removal device. Mainly comprises a sewage inlet, a fluidization area, a water outlet channel, a dosing area, an air flotation area, a scum collecting area, an air flotation device, a water outlet, a vent port, a backwashing water inlet and a slag discharge port. The integrated device has the advantages of high total nitrogen and total phosphorus removal rate, short retention time, compact arrangement, small occupied area, convenient operation, no need of secondary addition of an organic carbon source, and suitability for removing total nitrogen and total phosphorus in sewage advanced treatment.

Description

An integrated deep nitrogen and phosphorus removal device

technical field

The utility model belongs to the field of sewage treatment equipment, in particular to deep denitrification and phosphorus removal equipment.

Background technique

The main reason for the formation of water eutrophication is that nitrogen, phosphorus and other elements are discharged into the surface water with slow flow rate and long renewal period, which causes a large number of aquatic organisms such as algae to grow and reproduce, and the rate of organic matter production far exceeds the consumption rate. Accumulation, the process of destroying the balance of aquatic ecology.

In recent years, due to the rapid development of industry and agriculture, nitrogen and phosphorus pollution in natural water bodies in my country has gradually accumulated, and water eutrophication has occurred, especially in lakes and reservoirs. According to the "2020 China Ecological Environment Bulletin" issued by the Ministry of Ecology and Environment, 29% of lakes in my country are currently in a state of moderate to mild eutrophication, a slight deterioration from 28% in 2019.

In order to effectively solve the problem of eutrophication of water bodies, governments at all levels have also continuously improved wastewater discharge standards, which has increased the demand for deep phosphorus removal by enterprises.

Utility model content

Aiming at the above problems, the utility model develops a new integrated deep nitrogen and phosphorus removal device, which is difficult to remove nitrogen and phosphorus in the traditional sewage and wastewater treatment and the consumption of chemicals (such as carbon sources and phosphorus removal agents) is too high. To solve these two major problems, a high-efficiency and zero-carbon integrated deep nitrogen and phosphorus removal equipment has been developed. This equipment has the advantages of good water output, small footprint, low operating cost, and high degree of automation.

To achieve the above object, the utility model adopts the following technical solutions:

An integrated deep denitrification and phosphorus removal device, including sewage inlet, fluidization area, water outlet, dosing area, air flotation area, scum collection area, air flotation device, water outlet, vent, backwash water inlet, slag outlet;

The said fluidization zone is that the sewage enters from the bottom and exits from the top, and the sulfur autotrophic denitrification reaction mainly occurs inside, including the sewage inlet, the backwashing water inlet and the water outlet;

The upper part of the dosing area is connected to the fluidized area and the lower part is connected to the air flotation area, and the added medicaments are PAC and PAM;

The aeration equipment connected by the air flotation device through the pipeline is placed inside the air flotation area, and the top is connected to the scum collection area;

The air flotation device can form dense tiny bubbles in water;

The scum is collected in the scum collection area and discharged through the slag discharge port;

Further, the water outlet is a clean water outlet of the integrated equipment;

Further, the venting port is connected to the device body so as to discharge sewage;

Further, the backwash water inlet is connected to the equipment in the fluidization zone and is the backwash water inlet.

Compared with the prior art, the beneficial effects of the present utility model are:

(1) It can achieve the purpose of denitrification and phosphorus removal at the same time, and the deep phosphorus removal can reach TP<0.05mg/L; the deep denitrification can reach the denitrification load of 0.2-0.8KgN/m ³ /d, and the effluent nitrate is the lowest ≤ 2mg/L.

(2) The effluent effect is good, the floor space is small, and the operation cost is low without the need for additional carbon sources.

Description of drawings

Fig. 1 is a device diagram of the utility model;

Fig. 2 is A view of Fig. 1;

Fig. 3 is B view of Fig. 1;

The meaning of each label in the figure is: 1-water inlet; 2-fluidization area; 3-water outlet; 4-dosing area; 5-air flotation area; 6- scum collection area; 7-air flotation device; 8 -Water outlet; 9-Venting port; 10-Backwash water inlet; 11-Slag discharge port.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is described in detail:

As shown in Figure 1, an integrated deep nitrogen and phosphorus removal device includes a sewage inlet, a fluidization area, a water outlet, a dosing area, an air flotation area, a scum collection area, an air flotation device, a water outlet, and a vent. , Backwash water inlet and slag outlet;

The said fluidization zone is that the sewage flows from the bottom to the top, and the sulfur autotrophic denitrification reaction mainly occurs inside, and the effluent is collected into the outlet channel through the overflow weir, and the outlet channel is connected to the dosing area through the pipeline;

The upper part of the dosing area is connected to the fluidized area and the lower part is connected to the air flotation area, and the added medicaments are PAC and PAM;

Inside the air flotation area, an aeration device connected by an air flotation device through a pipeline is placed, and the top is connected to the scum collection area, which is finally discharged through the slag discharge port;

The air flotation device can form dense tiny bubbles in the water, and the air flotation device penetrates into the air flotation area through the pipeline;

The scum is collected in the scum collection area and discharged through the slag discharge port;

Preferably, the water outlet is the final clean water outlet of the integrated equipment;

Preferably, the venting port is connected to the device body for sewage discharge and venting;

Preferably, the backwash water inlet is connected to the equipment in the fluidized zone and is the backwash water inlet.

The working principle of this device is:

The incoming water enters the fluidization zone through the water inlet, and the sulfur autotrophic denitrification reaction occurs:

This process does not require additional carbon source, only needs to add part of sulfur powder and alkalinity, and then under the action of Thiobacillus denitrification, nitrate nitrogen is converted into inorganic nitrogen and removed; the effluent is collected through the upper outlet channel and then enters the dosing area , the dosing is PAC and PAM, the dosing is connected to the air flotation, the aeration device in the air flotation area produces tiny bubbles, and the small bubbles adhere to the hydrophobic group in the water, the three-phase combination of colloidal particles and water-air particles, forming a density less than The water flocs float to the water surface and form a scum layer, which is scraped off to take away the suspended solids after flocculation and sedimentation, and the suspended solids are discharged through the slag scraping area to achieve the purpose of phosphorus removal.

Claims (6)

1. An integrated deep denitrification and dephosphorization device, characterized in that it comprises a sewage inlet (1), a fluidization zone (2), a water outlet (3), a dosing zone (4), and an air flotation zone (5) , scum collection area (6), air flotation device (7), water outlet (8), vent (9), backwash water inlet (10), slag discharge outlet (11). 2. An integrated deep nitrogen and phosphorus removal device according to claim 1, characterized in that: the sewage in the fluidized zone (2) is in the bottom and top out, and the sulfur autotrophic denitrification reaction mainly occurs inside, Including a sewage inlet (1), a backwash water inlet (10), and a water outlet (3). 3. An integrated deep nitrogen and phosphorus removal device according to claim 1, characterized in that: the upper part of the dosing area (4) is connected to the fluidization area (2) and the lower part is connected to the air flotation area (5) , the added agents are PAC and PAM. 4. An integrated deep denitrification and dephosphorization device according to claim 1, characterized in that: the air flotation device (7) is placed inside the air flotation zone (5) with aeration equipment connected by pipelines, and the top is connected Scum collection area (6). 5 . The integrated deep nitrogen and phosphorus removal device according to claim 1 , wherein the air flotation device ( 7 ) is a device that can form densely dispersed micro-bubbles in water. 6 . 6 . The integrated deep nitrogen and phosphorus removal device according to claim 1 , wherein the scum is collected inside the scum collection area ( 6 ) and discharged through the slag discharge port ( 11 ). 7 .

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