CN210140508U - A new type of air flotation machine - Google Patents

Abstract

The utility model relates to a novel air floatation machine, which comprises an air floatation tank, a sewage inlet system, an air floatation system and a slag discharge device, wherein the sewage inlet system and the air floatation system are respectively connected with the air floatation tank, the slag discharge device is arranged above the air floatation tank, the lower end of the air floatation tank is also provided with a water outlet, and the water outlet is provided with a valve; the sewage water inlet system comprises a sewage tank, a sewage pump and a chemical dosing tank, and sewage added with chemicals is pumped into the air floatation tank through the sewage pump; the air floatation system comprises an air compressor, an air filter and a hollow fiber membrane, wherein the air compressor is connected with the inlet end of the air filter, the outlet end of the air filter is connected with the hollow fiber membrane, the hollow fiber membrane is arranged at the bottom of the air floatation tank, air is pressed into the air filter by the air compressor to be filtered and then enters the hollow fiber membrane, the air is released by the hollow fiber membrane to be combined with suspended matters in sewage, floating slag is formed on the surface of the floating liquid, and the floating slag is discharged by a slag discharge device; the air floatation machine has the advantages of simple structure, low energy consumption, difficult blockage, high safety and low cost.

Description

A new type of air flotation machine

technical field

The utility model relates to an air flotation machine, which belongs to the technical field of sewage treatment.

Background technique

Air flotation machine is one of the important equipment in sewage treatment engineering, which is used to separate colloid, opal, grease, suspended solids, etc. in sewage. The air flotation machine is a dissolved air system that produces a large number of fine air bubbles in the water, so that the air adheres to the suspended particles in the form of highly dispersed fine air bubbles, resulting in a state where the density is lower than that of water. -Water treatment equipment for liquid separation. Air flotation machine is divided into super-efficient shallow air flotation machine, vortex concave air flotation machine, and advection air flotation machine. At present, it has applications in water supply, industrial wastewater and urban sewage treatment. The advantage of the air flotation machine is that its solid-liquid separation equipment has the characteristics of low investment, small footprint, high degree of automation, and convenient operation and management.

Advection pressurized dissolved air flotation machine is one of them. Advection pressurized dissolved air flotation machine dissolves a large amount of air in water under certain conditions to form dissolved air water, which is used as a working medium and is suddenly decompressed through a releaser. , release quickly, produce a large number of fine bubbles to adhere to the "alum flower" in the wastewater after the coagulation reaction, so that the flocs float quickly, so as to quickly remove the pollutants in the water and achieve the purpose of water purification.

However, the currently used advective pressurized dissolved air flotation machine also has many shortcomings: complex structure: it needs to be equipped with a dissolved air tank, a releaser, a dissolved air pump, etc.; high energy consumption, the lift of the dissolved air pump generally requires more than 50m; easy Blockage: The dissolved gas tank and the releaser are easily blocked by solids in the water; Hidden danger: the dissolved gas tank is a pressure vessel.

Utility model content

The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a new type of air flotation machine, which has the advantages of simple structure, low energy consumption, not easy to block, high safety and low cost.

In order to solve the above technical problems, the utility model provides a new type of air flotation machine, which includes an air flotation tank, a sewage water inlet system, an air flotation system and a slag discharge device. The sewage water inlet system and the air flotation system are respectively connected with the air flotation tank, and the slag discharge The device is arranged above the air flotation tank, the lower end of the air flotation tank is also provided with a drain outlet, and a valve is arranged on the drain outlet;

The sewage water inlet system includes a sewage pool, a sewage pump and a dosing tank, and the sewage added with the medicine is pumped into the air flotation tank through the sewage pump;

The air flotation system includes an air compressor, an air filter and a hollow fiber membrane. The air compressor is connected to the inlet end of the air filter, the outlet end of the air filter is connected to the hollow fiber membrane, and the hollow fiber membrane is arranged at the bottom of the air flotation tank. The air compressor presses the air into the air filter and then enters the hollow fiber membrane. The hollow fiber membrane releases it and combines with the suspended matter in the sewage, and floats on the surface of the liquid to form scum, and the scum is discharged through the slag discharge device.

The technical scheme that the utility model is further limited is:

Further, in the aforementioned novel air flotation machine, the slag discharge device includes a sprocket, a chain and a scraper. The two sprockets are symmetrically arranged above the air flotation tank, and the two sprockets are connected by a chain, and several scrapers are evenly distributed on the chain. One side of the sprocket is connected with a motor through a chain, and the bottom of the other sprocket is provided with a slag discharge slot, and a slag scraper is vertically arranged in the slag discharge slot, wherein:

The slag scraper is composed of a fixed column, a slag scraping inclined plate and a brush. The fixed column is vertically arranged in the slag discharge tank, the slag scraping inclined plate is arranged on the top of the fixed column, and the brush is vertically arranged on one side of the top of the slag scraping inclined plate. ;

The slag scraping inclined plate is made of rubber, and the included angle between the slag scraping inclined plate and the fixed column is an obtuse angle.

The technical effect is that when the scraper scrapes the scum on the surface of the liquid, the falling of the scum will be incomplete when the scum falls into the slag discharge tank, and it will be brought back into the air flotation tank to increase the time and efficiency of sewage treatment. When the plate moves the scum to the slag discharge groove, the scum is further dropped into the slag discharge groove by the scraper provided in the slag discharge groove, so that each time the slag discharge rate is high, and the overall sewage treatment efficiency is improved;

The slag scraping inclined plate in the slag scraper is made of rubber. When the scraper passes by, the elasticity of the rubber will not be blocked. fall into the slag discharge tank;

There is an obtuse angle between the slag scraping inclined plate and the fixed column. Adjust the slag scraping inclined plate to be parallel to the moving scraper as much as possible, so as not to give excessive resistance to the scraper, and at the same time, it can hang clean the scum.

In the aforementioned new type of air flotation machine, the hollow fiber membrane adopts PVDF hollow fiber membrane.

Technical effect, the PVDF hollow fiber membrane used in the present invention has excellent chemical corrosion resistance and oxidation resistance, and the hollow fiber membrane is used for separation, which greatly reduces the cost.

In the aforementioned novel air flotation machine, the hollow fiber membrane is 0.02-0.3 microns.

The technical effect is that the size of the bubbles can be seriously controlled, and the separation problem can be effectively solved.

The beneficial effects of the present utility model are:

The utility model does not use the common dissolved air tank, releaser, dissolved air pump, etc., but replaces it with an air compressor, an air filter and a hollow fiber membrane, and has a simple structure. The structure is complex, and the energy consumption of the dissolved air pump is very high. Generally, the lift is required to be more than 50m, and the dissolved air tank and the releaser are easily blocked by solids in the water, which greatly increases the maintenance effort and affects the work efficiency. The safety of the pressure vessel of the dissolved air tank is poor. The combination of the air compressor, the air filter and the hollow fiber membrane of the utility model avoids the above defects on the premise of achieving the effect of treating sewage. and other impurities, so that less bubble impurities are finally used for sewage treatment, so as to avoid bringing more impurities to sewage and improve the efficiency of sewage treatment.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the concrete structure schematic diagram of the slag scraper in Fig. 1;

In the figure, 1-air flotation tank, 2-water outlet, 3-sewage tank, 4-sewage pump, 5-dosing tank, 6-air compressor, 7-air filter, 8-hollow fiber membrane, 9-sprocket , 10-chain, 11-scraper, 12-motor, 13-slag trough, 14-scraper, 141-fixed column, 142-scraper inclined plate, 143-brush.

Detailed ways

Example 1

The structure of a new type of air flotation machine provided in this embodiment is shown in Figure 1-2, including an air flotation tank 1, a sewage water inlet system, an air flotation system and a slag discharge device. The sewage water inlet system and the air flotation system are respectively connected with the air flotation system The flotation tank 1 is connected, and the slag discharge device is arranged above the air flotation tank 1. The lower end of the air flotation tank 1 is also provided with a drain port 2, and the drain port 2 is provided with a valve.

The sewage water inlet system includes a sewage tank 3, a sewage pump 4 and a dosing tank 5, and the sewage added with medicine is pumped into the air flotation tank 1 through the sewage pump 4;

The air flotation system includes an air compressor 6, an air filter 7 and a hollow fiber membrane 8. The air compressor 6 is connected to the inlet end of the air filter 7, and the outlet end of the air filter 7 is connected to the hollow fiber membrane 8. The hollow fiber membrane 8 is arranged at the bottom of the air flotation tank 1, the air compressor 6 presses the air into the air filter 7 and then enters the hollow fiber membrane 8, and is released by the hollow fiber membrane 8 to combine with the suspended matter in the sewage, and float on the surface of the liquid to form scum. , the scum is discharged through the slag discharge device;

As shown in Figure 2, the structure of the slag discharge device includes a sprocket 9, a chain 10 and a scraper 11. The two sprockets 9 are symmetrically arranged above the air flotation tank 1, and the two sprockets 9 are connected by a chain 10, which is evenly distributed on the chain 10. There are several scrapers 11, one side of one sprocket 9 is also connected with a motor 12 through a chain, and the bottom of the other sprocket 9 is provided with a slag discharge slot 13, and a slag scraper 14 is vertically arranged in the slag discharge slot 13. ,in:

The slag scraper 14 is composed of a fixed column 141, a slag scraping inclined plate 142 and a brush 143. The fixed column 141 is vertically arranged in the slag discharge groove 13, the slag scraping inclined plate 142 is arranged on the top of the fixed column 141, and the brush 143 is arranged vertically on one side of the top end of the slag scraping inclined plate 142;

The slag scraping inclined plate 142 is a rubber inclined plate, and the included angle between the slag scraping inclined plate 142 and the fixing column 141 is an obtuse angle.

In this embodiment, the hollow fiber membrane 8 is a PVDF hollow fiber membrane, and the hollow fiber membrane 8 is 0.02-0.3 microns.

In specific use, after the dosing tank is added with medicine, the sewage added with the medicine is pumped into the air flotation tank 1 through the sewage pump 4, and the air compressor 6 presses the air into the air filter 7 to filter and then enters the hollow fiber membrane 8, and passes through the hollow fiber membrane 8. The release is combined with the suspended solids in the sewage in the air flotation tank, and the scum is formed on the surface of the liquid. The scum accumulates on the surface of the sewage liquid, and the slag discharge device is turned on. The scum is cleaned, sent to the slag discharge tank 13, and further removed by the slag scraper 14, and the valve on the drainage port 2 at the lower end of the air flotation tank 1 is opened to directly discharge the lower layer of clean water.

The device used in this embodiment adopts the existing one, and the medicine in the dosing tank is also used when the conventional air flotation machine is used to treat the sewage.

In addition to the above-mentioned embodiments, the present invention may also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims (4)

1. A new type of air flotation machine, comprising an air flotation tank (1), a sewage water inlet system, an air flotation system and a slag discharge device, wherein the sewage water inlet system and the air flotation system are respectively connected with the air flotation tank (1), The slag discharge device is arranged above the air flotation tank (1), the lower end of the air flotation tank (1) is further provided with a drain port (2), and a valve is provided on the drain port (2), characterized in that : The sewage water inlet system includes a sewage pool (3), a sewage pump (4) and a dosing tank (5), and the sewage added with medicine is pumped into the air flotation tank (1) through the sewage pump (4); The air flotation system includes an air compressor (6), an air filter (7) and a hollow fiber membrane (8), and the air compressor (6) is connected to the inlet end of the air filter (7), The outlet end of the air filter (7) is connected to the hollow fiber membrane (8), the hollow fiber membrane (8) is arranged at the bottom of the air flotation tank (1), and the air compressor (6) The air is pressed into the air filter (7) and filtered into the hollow fiber membrane (8), released by the hollow fiber membrane (8) and combined with the suspended matter in the sewage, floating on the surface of the liquid to form scum, which is discharged through the slag discharge device. scum. 2. The new type of air flotation machine according to claim 1, characterized in that: the slag discharge device comprises a sprocket (9), a chain (10) and a scraper (11), and the two sprockets (9) are symmetrical It is arranged above the air flotation tank (1), and the two sprockets (9) are connected by a chain (10). The chain (10) has several scrapers (11) evenly distributed. One side of 9) is connected with a motor (12) through a chain, and the bottom of the other sprocket (9) is provided with a slag discharge groove (13), and a slag scraper (14) is vertically arranged in the slag discharge groove (13). ),in: The slag scraper (14) is composed of a fixed column (141), a slag scraping inclined plate (142) and a brush (143), and the fixed column (141) is vertically arranged in the slag discharge groove (13). , the slag scraping inclined plate (142) is arranged on the top of the fixed column (141), and the brush (143) is vertically arranged on one side of the top of the slag scraping inclined plate (142); The slag scraping inclined plate (142) is made of rubber material, and the included angle between the slag scraping inclined plate (142) and the fixing column (141) is an obtuse angle. 3 . The novel air flotation machine according to claim 1 , wherein the hollow fiber membrane ( 8 ) adopts PVDF hollow fiber membrane. 4 . 4. The novel air flotation machine according to claim 3, characterized in that: the hollow fiber membrane (8) is 0.02-0.3 microns.

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