CN205710300U - A kind of sewage-treatment plant - Google Patents

Abstract

A sewage treatment device, including a reaction pool, one end of the reaction pool enters water, the other end of the water exits, the middle is organically separated by a partition, and is divided into different treatment units, and each unit is equipped with its own supporting equipment to complete the treatment of each unit Purpose. Due to the adoption of the organic combination process mode of coagulation sedimentation + biochemistry + MBR + disinfection process, the integrated device has high reaction efficiency, small footprint, short production and installation period, strong processing capacity, small sludge discharge, and easy treatment. The waste water can be reused directly. This design adds PLC integrated control, so it can realize the characteristics of full automation and unattended operation.

Description

A sewage treatment device

technical field

The utility model relates to a sewage treatment device, which is mainly used in the sewage treatment process and belongs to the technical field of sewage treatment.

Background technique

Sewage treatment mainly includes biochemical, physical and chemical methods, and physical and chemical methods. At present, the preferred method is the combination of biochemical and physical chemistry, mainly because the operation and investment of the biochemical method are relatively low.

In the biochemical treatment process, the anaerobic-anoxic-aerobic process has the advantages of low energy consumption, small secondary pollution, and good treatment effect. It is considered to be an ideal preferred process. However, for some sewage treatment, the amount of sludge retained in the sewage is low, and the biochemical advantages cannot be fully utilized. Membrane Bio-Reactor (MBR) is a new water treatment technology that combines a membrane separation unit with a biological treatment unit. The membrane structures used are mainly flat membranes and hollow fiber membranes. Membrane bioreactor has the advantages of good treatment effect, stable water output, and small equipment footprint, and is widely used in the water treatment industry.

Based on the advantages and disadvantages of the above-mentioned sewage treatment process, it is an ideal choice to organically combine the two for sewage treatment to form a sewage treatment equipment.

Centralized sewage treatment has become the main way of urban sewage. However, centralized treatment requires corresponding pipeline network construction, a huge pipeline network system and midway lifting pumping stations, huge investment and expensive maintenance costs. The principle of rural municipal pipe network is that it is difficult to achieve effective centralized treatment. At present, my sewage treatment center is gradually developing to small towns and rural areas. Most of the existing miniaturized sewage treatment devices in my country have insufficient integration, cumbersome installation, and long production cycles. , Large amount of maintenance and management. In view of the above series of problems, an integrated sewage treatment device with high integration and suitable for small scale is designed.

Practice has proved that the current pilot plant has the following shortcomings:

Most of the current devices are single-unit designs, that is, separate reaction tanks are designed for different biochemical sections, which first occupy a large area and are unsightly and high investment costs; the current integrated sewage treatment devices generally only contain anaerobic and aerobic precipitation units. The purpose of reuse after treatment cannot be achieved. Therefore, the treated sewage needs to be discharged to the pipe network for centralized treatment before being reused. The current integrated sewage treatment device requires a large amount of installation and maintenance, and each unit of the device requires a large number of pipeline connections, which is inconvenient to install.

Utility model content

The purpose of this design is to propose a new type of sewage treatment integrated device for the deficiencies of the existing technology. The construction and installation of the device is convenient and fast, with strong operability, and has the functions of nitrification, denitrification, filtration and disinfection.

The purpose of this utility model is to realize through the following technical solutions:

A sewage treatment device, including a reaction pool, one end of the reaction pool enters water, the other end of the water exits, and the middle is organically separated by a partition, and is divided into different treatment units. According to the flow direction of sewage, they are coagulation sedimentation tank, anaerobic/anoxic, The aerobic pool, MBR pool and disinfection tank, the lower part of the coagulation sedimentation tank has a dosing box and a dosing pump, and the medicine is added to the water inlet. The bottom side of the sedimentation tank has a flow channel connected to the anaerobic/anoxic tank, the upper part of the anaerobic/anoxic tank has a water passage, the anaerobic/anoxic tank and the aerobic tank are connected by a water channel, and the aerobic tank has a The overflow port, the sewage flows into the MBR pool through the overflow port above the aerobic pool, and the MBR pool and the disinfection pool are connected by a water pump. There are three ultraviolet disinfection pipes arranged in the disinfection pool, and there is a water outlet on one side of the disinfection pool.

As a further preference, the bottom of the reaction pool is further equipped with a dosing unit, a digestive fluid reflux pump and a return water pump.

As a further preference, an aerobic aeration disc is provided inside the aerobic zone to provide dissolved oxygen for the aerobic stage. The aeration fan of this unit adopts an electromagnetic fan, which has the advantages of low noise, small volume and low energy consumption. The MBR pool adopts the treatment High capacity and anti-fouling hollow fiber membrane module.

As a further preference, the fan of the aerobic unit and the MBR produced water pump should be located above the MBR tank and the disinfection tank.

As a further preference, the entire pool body is made of carbon steel with anti-corrosion paint inside.

Compared with conventional devices, it has the following advantages:

The device has the advantages of small footprint, convenient installation, convenient operation and maintenance, and stable operation.

This design can save the connection of external pipelines, reduce the multiple lifting of sewage, and reduce the investment of the cylinder by about 15-25%.

Compared with the conventional reaction device, the design adopts the electromagnetic fan, which has the advantages of low noise, small footprint, low operating power consumption, etc.;

Compared with conventional devices, this design has an MBR unit and a disinfection unit. The sewage treated by this integrated device can be directly reused without being discharged to the pipe network for centralized treatment.

Several sets of the device can be connected in parallel to run at the same time, and it is suitable for a rural family or a community in a county or urban area.

The design adopts PLC integrated management, which can realize unattended continuous and stable operation, and reduce the amount of operation and maintenance and personnel management costs.

Description of drawings

Below according to accompanying drawing, the utility model is described in further detail.

Fig. 1 is a structural diagram of the sewage treatment device described in the embodiment of the present invention.

detailed description

For setting forth the utility model in more detail, this utility model embodiment is as follows:

Example 1

As shown in Figure 1, a sewage treatment device includes a reaction tank. One end of the reaction tank enters water, and the other end outputs water. The middle is organically separated by a partition and divided into different treatment units. According to the flow direction of sewage, it is a coagulation sedimentation tank 1 , anaerobic/anoxic 2, aerobic pool 3, MBR pool 4 and disinfection pool 5, the lower part of the coagulation sedimentation tank has a dosing box 6 and a dosing pump, the medicine is added to the water inlet, the coagulation sedimentation tank , There is a mixer in the anaerobic/anoxic tank, the flow channel at the bottom of the coagulation sedimentation tank is connected with the anaerobic/anoxic tank, the upper part of the anaerobic/anoxic tank has a water passage, the anaerobic/anoxic tank and the aerobic tank There is an overflow port above the aerobic pool, and the sewage flows into the MBR pool through the overflow port above the aerobic pool. The MBR pool and the disinfection pool are connected by a water pump. There are three ultraviolet disinfection pipes arranged in the disinfection pool. One side of the disinfection pool has a water outlet.

The bottom of the reaction pool also has a dosing unit, a digestive juice reflux pump and a return water pump.

There is an aerobic aeration disc inside the aerobic zone, and the MBR pool adopts hollow fiber membrane modules with strong processing capacity and anti-pollution.

The fan of the aerobic unit and the MBR produced water pump should be located above the MBR tank and the disinfection tank. The whole pool body is made of carbon steel with anti-corrosion paint inside.

The incoming water is lifted by the pump to the water inlet and enters the coagulation sedimentation tank. At the same time, the dosing pump of the coagulation sedimentation tank adds PAC to the water inlet. Under the action of the mixer, the sewage and the coagulation agent are fully mixed and evenly removed. Large suspended particles and sediments in the water are subjected to preliminary solid-liquid separation; the pretreated sewage enters the anaerobic/anoxic pool through the circulation channel at the bottom side of the coagulation tank, where the sewage, The digestive juice is fully mixed with the activated sludge, and denitrification is carried out under the action of anaerobic bacteria and/or facultative bacteria to remove nitrate nitrogen and total nitrogen while simultaneously removing phosphorus; after that, it passes through the water passage in the front section of the aerobic tank Use the water level difference to flow into the aerobic tank unit. The aerobic tank has a relatively high concentration of activated sludge rich in aerobic bacteria. At the same time, through the aeration of the electromagnetic fan, it provides sufficient dissolved oxygen to decompose organic matter and ammonia nitrogen. Oxidized to nitrate nitrogen, the main pollutants are removed in the aerobic unit. Through the action of gravity, the treated sewage flows into the MBR unit through the overflow above the aerobic tank, where the mud and water are separated, and the effluent filtered by the MBR is The MBR produced water pump is discharged to the disinfection pool at the back; there are three ultraviolet disinfection pipes arranged in the disinfection pool, and the treated sewage is sterilized by ultraviolet light and then discharged to the water demand place through the reuse water pump. The treated sewage water quality is good and can be used for flushing Toilets, watering flowers, washing cars, etc.

The sludge in the MBR tank is returned to the aerobic tank and the anaerobic tank/anoxic tank through the digestive liquid return pump at the same time, which has supplemented the sludge loss of the unit and ensured sufficient activated sludge.

The mixer, water pump, dosing pump, fan, etc. of the overall device are all controlled by the PLC installed on the side wall of the device. After running for a period of time, if the amount of sludge in the MBR tank is found to be too high, a part of the remaining sludge is discharged through the sludge discharge pipe under the MBR; at the beginning of the device's start-up and when a sudden accident occurs, there are accident discharge ports on the outside of the bottom of each reaction tank , manually open the discharge valve.

The method of the utility model is used to treat domestic sewage in a community in Hebei, and is compared with a conventional integrated device. The COD of the incoming water is about 330-400mg/L, and the ammonia nitrogen is about 30-50mg/L. After being treated by the integrated sewage treatment device, the produced water can reach COD≤40mg/L. The ammonia nitrogen is not detected, and the suspended solids and E. coli are low. In accordance with the requirements of the first-class A discharge standard, the treated sewage is used for irrigation of flowers and plants in the community and water for landscape. Therefore, the urban tap water is not used for the landscape and flowers and green areas of the community, which saves tap water and avoids the phenomenon of domestic sewage being splashed on the road in the past. At the same time, the air quality of the community has been greatly improved in summer because there is no random discharge of sewage.

The device is used for the wastewater treatment of a farmer's family. The project completed the production and installation of the device in only two weeks. After the on-site debugging and stabilization, the COD of the incoming water is about 330-400mg/L, and the ammonia nitrogen is 30-50mg/L. Left and right, the water produced by this integrated sewage treatment device can reach COD ≤ 42mg/L, ammonia nitrogen is not detected, suspended solids and E. coli are lower than the requirements of the first-class A discharge standard, and the treated water is used for vegetable garden For watering and daily car washing.

The specific embodiments of the utility model have been described above, which are relatively specific and detailed, but this should not be interpreted as limiting the patent scope of the utility model. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present utility model, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be determined by the appended claims.

Claims (5)

1. a sewage-treatment plant, including reaction tank, reaction tank one end intakes, other end water outlet, and centre separates by dividing plate is organic, It is divided into different processing units, is followed successively by coagulative precipitation tank, anaerobic/anoxic, Aerobic Pond, MBR pond according to the flow direction of sewage and disappears Poison pond, the bottom of coagulative precipitation tank has dosing tank and dosing pump, is added by medicine to water inlet, coagulative precipitation tank, anaerobism/lack Having blender in oxygen pond, coagulative precipitation tank bottom sides has circulation passage and connects with anaerobic/anoxic pond, top, anaerobic/anoxic pond There is aquaporin, by crossing aquaporin connection between anaerobic/anoxic pond and Aerobic Pond, there is above Aerobic Pond overfall, sewage Overfall above Aerobic Pond flows into MBR pond, by producing water pump connection between MBR pond and sterilization pool, arranges in sterilization pool Having three disinfection by ultraviolet light pipes, the side of sterilization pool has outlet.

Sewage-treatment plant the most according to claim 1, it is characterised in that: the bottom of described reaction tank also have dosing unit, Digestive system reflux pump and reuse water pump.

Sewage-treatment plant the most according to claim 1, it is characterised in that: it is provided with aerobic aeration dish, MBR inside aerobic zone Pond uses disposal ability strong and resistant to pollution hollow fiber film assembly.

Sewage-treatment plant the most according to claim 1, it is characterised in that: the blower fan of aerobic unit, MBR produce water pump with position Above MBR pond and sterilization pool.

Sewage-treatment plant the most according to claim 1, it is characterised in that: in whole cell body uses carbon steel, brush corrosion resistant coating is made.