CN207031014U - A kind of new batch-type air-dissolving air-float equipment for separating liquid from solid - Google Patents

Abstract

The utility model provides a novel sequencing batch type dissolved air flotation solid-liquid separation device, comprising a tubular reactor, the front end of the tubular reactor is equipped with a tubular mixer, and the front end of the tubular mixer is connected to There is one end of a water inlet pipe, the other end of the water inlet pipe is respectively connected to a dosing valve and a water inlet valve through a tee, and the other end of the water inlet valve is connected to a raw water pump; the tubular reactor The rear end of the tank is connected to the bottom water inlet of an air flotation separation tank. The inner lower half of the air flotation separation tank is provided with a plurality of perforated water outlet pipes with multiple discharge holes on the surface. One end of the perforated water outlet pipes is closed, and the other end is connected to the water outlet valve arranged outside the air flotation separation tank. This patent has the following advantages: 1. The air flotation separation tank is set independently. When the scum rises, the water flow is rising or static, and the separation efficiency is high; 2. The tube mixer is used to create micro-bubbles and coagulation flocs The perfect copolymerization environment creates conditions for the copolymerization air flotation, the separation is more sufficient, and it is not easy to block.

Description

A new sequence batch type dissolved air flotation solid-liquid separation device

technical field

The utility model relates to a solid-liquid separation device for sewage treatment, in particular to a new sequence batch type dissolved air flotation solid-liquid separation device with simple and reliable overall structure, ingenious design, sufficient reaction, not easy to be blocked, and good separation effect.

Background technique

Air flotation technology is an efficient solid-liquid separation technology, which is widely used in the pretreatment of oily, suspended solids, and high-concentration organic wastewater, such as the treatment of wastewater from oil refining, mechanical processing, printing and dyeing, papermaking, and pesticide industries. It is used to remove oil, emulsion and suspended particles whose specific gravity is less than or close to 1 in wastewater. Compared with the sedimentation method, the separation efficiency of the air flotation method is high, and the separation capacity of the air flotation method is about 4 to 5 times that of the precipitation separation method; Ammonia nitrogen degradation function; the water content of scum in the upper layer of air flotation is low, which can reduce the cost of sludge disposal.

There are many types of traditional air flotation methods, but they are always the same. They mainly include three processes: the generation of air bubbles, the adhesion of air bubbles and particles, and the floating and separation of flocs. According to the different ways of generating bubbles, the air flotation method is roughly divided into three types: electrolytic air flotation, diffused air flotation and dissolved air flotation. Among them, the bubbles produced by the dissolved air flotation method are uniform and fine compared with the diffused air flotation, and the removal efficiency of pollutants is much higher than that of the diffused air flotation. At the same time, it is more efficient than the electrolytic air flotation in terms of operation, operation and economy. Convenient and reasonable, so it is the most widely used.

However, the traditional dissolved air flotation method has the following disadvantages: (1) In the separation area, the air bubbles adhere to the pollutants and flow upward, while the treated water flows downward, which is greatly affected by the hydraulic conditions and the quality and quantity of raw water, and the operation is unstable. The effect is much lower than the theoretical effect; (2) The traditional dissolved air flotation adopts the narrow and complicated flow path of the dissolved air releaser, which is very easy to block. Although many releasers have flushing measures, the effect is generally not ideal; (3) The traditional dissolved air flotation reaction tank, contact area and separation area are set up separately, occupying a large area; (4) The traditional dissolved air flotation reaction tank is designed according to the design parameters of the sedimentation tank or no reaction tank, which does not meet the requirements of the air flotation process. response request. In short, traditional dissolved air flotation is greatly affected by hydraulic conditions, raw water quality and quantity, the releaser is easy to block, the degree of reaction is unreasonable, the operation is unstable, and the separation effect is relatively poor.

Utility model content

In order to solve the above problems, the utility model provides a new sequence batch type dissolved air flotation solid-liquid separation device with simple and reliable overall structure, ingenious design, sufficient reaction, not easy to block, and good separation effect.

A new sequence batch type dissolved air flotation solid-liquid separation device to achieve the purpose of this utility model, comprising a tubular reactor, the front end of the tubular reactor is equipped with a tubular mixer, the front end of the tubular mixer One end of a water inlet pipe is connected, and the other end of the water inlet pipe is respectively connected to a dosing valve and a water inlet valve through a tee, and the other end of the water inlet valve is connected to a raw water pump;

The back end of the tubular reactor is connected to the bottom water inlet of an air flotation separation tank.

The inner lower half of the air flotation separation tank is provided with a plurality of perforated water outlet pipes with multiple discharge holes on the surface, one end of the perforated water outlet pipe is closed, and the other end is connected to the water outlet valve arranged outside the air flotation separation tank; A liquid level sensor is provided on the left side of the top of the air flotation separation tank, a slag scraper is provided on the top right side of the air flotation separation tank, and a bottom slightly lower than the highest liquid level is provided at the bottom of the slag scraper. A slag scraper; a slag outlet is opened on the right side wall of the air flotation separation tank at a position equal to the highest liquid level.

The raw water pump, water inlet valve, dosing valve, liquid level sensor, slag scraper, water outlet valve, and dissolved air inlet valve are all connected to the master control box at the same time.

A new batch-type dissolved air flotation solid-liquid separation device described in this patent, the raw water in the raw water pool to be treated is lifted by the raw water pump, the coagulant enters the pipeline mixer through the dosing valve, and flows through the pipeline reactor. The dissolved air water enters the pipeline reactor through the dissolved air water inlet valve, and the reacted water and dissolved air water enter the air flotation separation tank together. When the water level rises to the highest level, the liquid level sensor senses it and is controlled by the main control box. Stop water intake, stop dosing, stop entering dissolved air water, and enter the static air flotation separation time. When the microbubble adhered suspended matter rises to the highest liquid level of the air flotation separation tank, start the slag scraper, and the slag scraper will carry out the process. The scum is scraped by rotation, and the scum is discharged from the slag discharge port. After the scum is scraped, the water outlet valve is opened, and the clean water after air flotation separation is discharged from the bottom water outlet hole and the perforated water outlet pipe, and enters the water production tank. After the water in the air flotation separation tank is discharged, the raw water pump is turned on to enter the next cycle.

A new sequence batch type dissolved air flotation solid-liquid separation device described in this patent has the following advantages:

1. The air flotation separation tank is set independently. When the scum rises, the water flow is rising or static, so that the hydraulic conditions of the air flotation separation can be idealized, thereby greatly improving the efficiency and effect of the dissolved air flotation separation;

2. A tubular mixer is adopted, and the dissolved air water enters from the middle of the tubular reactor, and the contact area is tubular, and the raw water, medicament and dissolved air water react and contact in the tubular reactor, creating microbubbles and coagulation flocculation The copolymerization environment of the body creates conditions for the copolymerization air flotation, the separation is more sufficient, and it is not easy to block.

Description of drawings

Fig. 1 is a structural schematic diagram of a new sequencing batch type dissolved air flotation solid-liquid separation device of the present invention.

detailed description

As shown in Fig. 1, a kind of novel sequential batch type dissolved air flotation solid-liquid separation device of the present utility model comprises tubular reactor 5, and the front end of described tubular reactor 5 is equipped with tubular mixer 4, so The front end of the tubular mixer 4 is connected with one end of a water inlet pipe 13, and the other end of the water inlet pipe 13 is respectively connected with a dosing valve 3 and a water inlet valve 2 through a tee, and the water inlet valve 2 The other end is connected with a raw water pump 1 .

The rear end of the tubular reactor 5 is connected to a bottom water inlet 16 of an air flotation separation tank 7 .

The inner lower half of the air flotation separation tank 7 is provided with a plurality of perforated water outlet pipes 14 with multiple discharge holes 8 on the surface. One end of the perforated water outlet pipe 14 is closed, and the other end is connected to the air flotation separation tank 7. External water outlet valve 9; a liquid level sensor 11 is provided on the top left side of the air flotation separation tank 7, and a slag scraper 10 is provided on the top right side of the air flotation separation tank 7, and the slag scraper 10 The bottom of the tank is provided with a slag scraper 18 whose bottom is slightly lower than the highest liquid level 17; on the right side wall of the air flotation separation tank 7, a slag outlet 15 is opened at a position equal to the highest liquid level 17.

The raw water pump 1, water inlet valve 2, dosing valve 3, liquid level sensor 11, slag scraper 10, water outlet valve 9, and dissolved air inlet valve 6 are all connected to the master control box 12 at the same time.

A new batch-type dissolved air flotation solid-liquid separation device described in this patent, the raw water A of the raw water pool to be treated is lifted by the raw water pump 1, and the coagulant E enters the pipeline mixer 4 through the dosing valve 3, and flows Through the pipeline reactor 5, the dissolved air water C enters the pipeline reactor 5 through the dissolved air water inlet valve 6, and the reacted water and the dissolved air water enter the air flotation separation tank 7 together. When the water level rises to the highest liquid level 17, the liquid The level sensor 11 senses, and is controlled by the master control box 12, stops water intake, stops dosing, stops dissolved air water to enter, and enters the static air flotation separation time. When the surface is on the surface, open the slag scraper 10, and the scum scraper 18 rotates to scrape the scum. The scum is discharged from the slag discharge port 15. After the scum is scraped, the water outlet valve 9 is opened. The perforated water outlet pipe 14 is collectively discharged and enters the water production tank. After the water in the air flotation separation tank 7 is discharged, the raw water pump 1 is turned on to enter the next cycle.

The above-mentioned embodiments are only descriptions of preferred implementations of the present utility model, and are not intended to limit the scope of the present utility model. The various deformations and improvements made should fall within the protection scope determined by the claims of the present utility model.

Claims (2)

1. A novel sequence batch type dissolved air flotation solid-liquid separation device is characterized in that it comprises a tubular reactor, the front end of the tubular reactor is equipped with a tubular mixer, and the front end of the tubular mixer One end of a water inlet pipe is connected, and the other end of the water inlet pipe is respectively connected with a dosing valve and a water inlet valve through a tee, and the other end of the water inlet valve is connected with a raw water pump; the tubular reaction The rear end of the device is connected to the bottom water inlet of an air flotation separation tank; the inner lower half of the air flotation separation tank is provided with a plurality of perforated water outlet pipes with multiple discharge holes on the surface, and one end of the perforated water outlet pipe is closed , the other end is connected to the water outlet valve arranged outside the air flotation separation tank; a liquid level sensor is provided on the left side of the top of the air flotation separation tank, and a slag scraper is provided on the top right side of the air flotation separation tank, so The bottom of the slag scraper is provided with a slag scraper whose bottom is slightly lower than the highest liquid level; a slag outlet is opened on the right side wall of the air flotation separation tank at a position equal to the highest liquid level. 2. A new sequence batch type dissolved air flotation solid-liquid separation device according to claim 1, characterized in that the raw water pump, water inlet valve, dosing valve, liquid level sensor, slag scraper, water outlet The valve and the dissolved air water valve are connected to the master control box at the same time.