CN106045017A - Integrated biological rotating disc and filter cloth coupled sewage treatment device - Google Patents

Abstract

The invention belongs to the technical field of sewage treatment equipment manufacturing in environmental protection, and in particular relates to sewage treatment equipment coupled with an integrated biological turntable and filter cloth. The motor drives the rotating shaft to rotate, and drives the biological turntable and the filter cloth disc to rotate at a low speed at the same time. The sewage to be treated enters through the water inlet pipe, and the biological turntable performs biochemical treatment on it. The treated sewage enters the filter cloth part from the top of the water retaining plate , the sewage enters the filter cloth through the filter cloth, and the sludge is trapped on the outer surface of the filter cloth. The filter cloth rotates with the rotating shaft. When it rotates to the top, the filtered water enters the outlet pipe and is discharged. Slab scraped off. The feature of the present invention is that the biological turntable is coupled with the filter cloth, driven coaxially, without additional fans and motors, simple in structure, low in operating costs, and simultaneously biochemical and filtering to ensure good water treatment effects; simple in operation, especially suitable for technical Weak rural sewage treatment process.

Description

Integrated biological turntable and filter cloth coupling sewage treatment equipment

technical field

The invention belongs to the technical field of sewage treatment equipment manufacturing in environmental protection, and in particular relates to an integrated biological turntable and filter cloth coupled sewage treatment equipment for the treatment of small and medium-scale domestic sewage, urban wastewater, and medium-low concentration industrial wastewater.

Background technique

The biological turntable process is a kind of biofilm method, which is developed on the basis of biological filters, sometimes also known as turntable biofilters. Since the establishment of the first biological turntable sewage treatment plant in Germany in 1954, by the 1980s, more than 2,000 biological turntable wastewater treatment plants had been built in Europe. In China, the research and application of biological turntables began in the 1970s, and they have been used in wastewater treatment in printing and dyeing, papermaking, leather and petrochemical industries.

Cloth filter technology is a new surface filtration technology developed in recent years, which can technically replace traditional deep bed filtration equipment. Its working principle is: after the raw water enters the filter tank and passes through the baffle to dissipate energy, it passes through the microporous filter cloth fixed on the bracket, the solid suspended matter is trapped on the outside of the filter cloth, the filtrate is collected through the hollow tube, and the gravity flow passes through the overflow The tank drains the filter. During filtration, the sludge is adsorbed on the outside of the filter cloth, gradually forming a sludge layer. With the accumulation of sludge on the filter cloth, the filter resistance of the filter cloth increases, and the liquid level in the pool gradually rises. When the liquid level rises to the set value, The PLC starts the reverse suction pump and the transmission device at the same time. During the rotation of the disc, the scraper fixed on the outside of the filter cloth rubs against the surface of the filter cloth to scrape off the sludge on the surface of the filter cloth. At the same time, the water in the disc is drawn from the inside to the outside Suction and clean the sludge in the micropores of the filter cloth. A sludge discharge pipe is installed at the bottom of the pool. After setting the time, the sludge discharge pump is automatically opened by the PLC to discharge the sludge. Compared with the traditional filtration technology, the filter cloth filter has the characteristics of compact structure, small water head loss, small footprint, and low treatment cost. It can be used as a follow-up for the phosphorus removal of the secondary effluent of the urban misunderstanding treatment plant and the further improvement of water quality. The advanced treatment unit is an economically feasible process. This process has begun to be adopted by sewage treatment plants in some European and American countries as a subsequent advanced treatment unit for urban sewage to further improve water quality.

At present, the discharge of rural domestic sewage in my country is about 8-9 billion tons per year, but the treatment situation is not optimistic. 96% of villages do not have drainage channels and sewage treatment systems, and domestic sewage is discharged randomly, causing serious pollution to the rural environment, becoming a potential safety hazard in rural water sources, and exacerbating the crisis of fresh water resources. The characteristics of rural sewage treatment are firstly low treatment rate, followed by intermittent discharge, which is small and scattered, followed by high concentration of nitrogen and phosphorus and containing a large amount of nutrients, bacteria, viruses, etc. There is a certain degree of difficulty. Rural domestic sewage refers to feces and its flushing water, bathing sewage and kitchen sewage in the living process of residents. In addition, it also includes some sewage produced in the process of scattered farming in rural areas. Rural domestic sewage contains organic substances, nitrogen and phosphorus nutrients, suspended solids and germs and other pollutants. Compared with urban sewage treatment, rural domestic sewage treatment has its own characteristics. First of all, the technical and economic foundation in rural areas is weak, lacking restructuring funds and professional technical management personnel, and it is difficult to guarantee the daily operation and maintenance of sewage treatment facilities. Secondly, rural domestic sewage has its own characteristics in terms of discharge methods, water quality and water volume, mainly manifested in: wide dispersion, difficult collection; large changes in water volume, uneven discharge; good biodegradability, and almost no toxic and harmful organic pollutants. In China, the treatment of domestic sewage in rural areas has just started with the aggravation of pollution in the three rivers and three lakes. However, there are few treatment projects for rural domestic sewage, and many treatment technologies are only in the scope of demonstration research.

Contents of the invention

In view of the above problems, the present invention provides an integrated biological turntable and filter cloth coupled sewage treatment equipment.

The technical solution adopted in the present invention is: an integrated biological turntable and filter cloth coupling sewage treatment equipment, including a motor, a rotating shaft, a device casing, a water inlet pipe, a vent hole, a water outlet pipe, a mud discharge pipe, a biological turntable disk, a baffle Water plate, filter cloth, fixed scraper and movable bottom scraper;

The air holes are located on the top surface and the front surface of the left end of the equipment casing, so that the disc of the biological turntable is fully connected with the air, which is conducive to the formation of biofilm, which is further divided into an aerobic layer and an anaerobic layer;

The water inlet pipe and the mud discharge pipe are respectively connected to the middle of the rear surface and the bottom of the front surface of the equipment casing;

The motor is connected to the water outlet pipe through the rotating shaft, runs through the whole equipment parallel to the horizontal plane, and drives the disc of the biological turntable and the filter cloth to rotate at a relatively low speed;

The biological turntable is vertically distributed on both sides of the rotating shaft, and the fixed scraper and filter cloth are respectively placed above and below the outlet pipe;

The two movable bottom scrapers are placed at the bottom of the equipment below the filter cloth, and the sediment falling on the filter cloth is pushed to the mud discharge pipe to remove the equipment. A water barrier is vertically arranged between the two movable bottom scrapers ;

As a preferred technical solution: the disc of the biological turntable and the filter cloth share a rotating shaft and a motor;

As a preferred technical solution: the shape of the filter cloth is semicircular, and the diameter of the filter cloth disc is 0.8-3.0m;

As a preferred technical solution: the linear speed of the rotating shaft is relatively low, which is 1r/min-3r/min;

As a preferred technical solution: the diameter range of the biological turntable disc is 1.2-3.0m, 40% of the working area of the biological turntable disc is immersed in sewage during the rotation process, and the remaining 60% is exposed to air and continues to rotate;

As a preferred technical solution: the shape of the vent hole is rectangular, and other shapes can also be changed;

As a preferred technical solution: the rotating shaft is 10-15cm higher than the water surface in the tank;

As a preferred technical solution: there is a reverse suction pump at the sludge discharge pipe;

As a preferred technical solution: the mud discharge pipe is composed of several mud discharge branch pipes, the diameter range of the mud discharge branch pipe is 100-500mm, and the diameter range of the mud discharge pipe is 150-700mm;

The beneficial effects of the invention are: integrated equipment, simple structure, convenient maintenance and point inspection; no need for additional fans, low operating costs; circulating state makes microorganisms active, good water treatment effect; simple operation, especially suitable for weak technology Rural sewage treatment process.

Description of drawings

Figure 1 is a top view of an integrated biological turntable and filter cloth coupled sewage treatment equipment;

Figure 2 is an elevation view of an integrated biological turntable and filter cloth coupled sewage treatment equipment;

Figure 3 is a schematic diagram of the internal structure of an integrated biological turntable and filter cloth coupled sewage treatment equipment;

Figure 4 is a schematic diagram of a filter cloth of an integrated biological turntable and filter cloth coupling sewage treatment equipment;

Figure 5 is a schematic diagram of the biofilm structure of an integrated biological turntable and filter cloth coupling sewage treatment equipment;

In the figure: 1 motor, 2 rotating shaft, 3 equipment casing, 4 water inlet pipe, 5 vent hole, 6 water outlet pipe, 7 mud discharge pipe, 8 biological turntable disc, 9 water retaining plate, 10 filter cloth, 11 fixed mud scraper , 12 Move the bottom scraper.

Specific implementation method

In order to better explain the purpose and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

As shown in the figure, an integrated biological turntable and filter cloth coupling sewage treatment equipment includes a motor 1, a rotating shaft 2, a device casing 3, a water inlet pipe 4, a vent hole 5, an outlet pipe 6, a mud discharge pipe 7, and a biological turntable. sheet 8, water retaining plate 9, filter cloth 10, fixed mud hanging plate 11 and movable bottom scraper 12;

The sewage to be treated enters the integrated equipment from the water inlet pipe 4 connected to the equipment casing 3. The motor 1 drives the rotating shaft 2 to rotate, and simultaneously drives the biological turntable disc 8 and the filter cloth 10 to rotate at a relatively low speed. The area of the biological turntable disc 8 is About 40% of the water is submerged in the sewage in the tank, and the turntable is in contact with the air and sewage alternately through rotation. After a period of time, a layer of biofilm inhabiting a large number of microorganisms will adhere to the turntable. As the species composition of microorganisms gradually stabilizes, their metabolic functions are gradually brought into play and reach a stable level. The organic pollutants in the sewage are adsorbed and degraded by the biofilm, so as to achieve the purpose of sewage treatment. Among them, the ventilation holes 5 are distributed on the upper half and the top of the side; the function of the ventilation holes 5 is to allow air to enter the equipment so as to be in contact with the biological turntable disk 8, and the biofilm is divided into an aerobic layer and an anaerobic layer; after treatment The sewage enters the filter cloth 10 from above the water retaining plate 9, the filter cloth 10 is semicircular, the filter cloth 10 is completely submerged in water, the sewage penetrates the filter cloth 10 and enters the filter cloth, and the sludge is adsorbed on the outside of the filter cloth 10 , gradually forming a sludge layer, with the accumulation of sludge on the filter cloth 10, the filter resistance of the filter cloth 10 increases, and the liquid level in the equipment gradually rises. When the liquid level rises to the set value, the PLC simultaneously turns on the reverse suction pump And the transmission device, the rotation process of the rotating shaft 2, when the filter cloth 10 rotates to the top, the filtered water enters the outlet pipe 6 to be discharged, and the fixed mud scraper 11 fixed on the outside of the filter cloth 10 rubs against the surface of the filter cloth 10 to scrape off the filtered water. The sludge on the surface of the filter cloth 10; at the same time, the water in the equipment is sucked from the inside to the outside to clean the sludge in the micropores of the filter cloth 10, and then moved to the sludge discharge branch pipe by the moving bottom scraper 12 and then merged into the sludge discharge pipe 7 Finally, use the sludge discharge pump to discharge it out of the equipment.

Finally, it should be noted that the above embodiments are only used for supplementary illustration of the technical solution of the present invention rather than limitation. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent replacements to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and they all should be included in the scope of the present invention. within the scope of the claims.

Claims (9)

1. an integral biological rotating disk couples sewage disposal device with filter cloth, it is characterised in that: include motor (1), rotating shaft (2), device housings (3), water inlet pipe (4), air-vent (5), outlet pipe (6), discharge pipeline (7), disk plate for biological rotating disk (8), dash Cleaning shoe (12) bottom plate (9), filter cloth (10), fixing cleaning shoe (11) and movement；

Described air-vent (5) is positioned at top surface and front surface on device housings (3) left end；

Described water inlet pipe (4) and discharge pipeline (7) be connected with in the middle part of the rear surface of device housings (7) and front surface bottom respectively Logical；

Described motor (1) is connected with outlet pipe (6) by rotating shaft (2), runs through whole equipment with plane-parallel；

Described biological rotating disk (8) vertical distribution is in rotating shaft (2) both sides, and fixing cleaning shoe (11) is respectively placed in water outlet with filter cloth (10) Pipe (6) top and lower section；

Said two moves bottom cleaning shoe (12) and is placed in bottom filter cloth (10) bottom device, and two move in bottom cleaning shoe (12) Between be vertically installed with a water fender (9).

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: biological Rotating disk disc (8) and filter cloth (10) share rotating shaft (2) and motor (1).

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: filter cloth (10) shape uses semicircle, filter cloth disc diameter scope 0.8-3.0m.

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: rotating shaft (2) rotating speed is relatively low, for 1r/min-3r/min.

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: biological Rotating disk disc (8) diameter range 1.2-3.0m, in disk plate for biological rotating disk (8) rotation process, the work area of 40% immerses sewage, its Yu 60% part contact air, persistently rotate.

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: ventilative Hole (5) be shaped as rectangle, it is possible to change and do other shapes.

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: rotating shaft (2) trough inner water face 10-15cm is exceeded.

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: spoil disposal Pipe (7) place is provided with back suction sucking pump.

Integral biological rotating disk the most according to claim 1 couples sewage disposal device with filter cloth, it is characterised in that: spoil disposal Pipe (7) is made up of some spoil disposal arms, spoil disposal branch diameter scope 100-500mm, discharge pipeline caliber scope 150-700mm.