CN204490636U - A wastewater advanced pretreatment grease trap - Google Patents

Abstract

The utility model discloses a wastewater advanced pretreatment oil separation tank, which belongs to the field of wastewater treatment and comprises a cylinder body, a water inlet and a water outlet of the cylinder body, wherein a plurality of baffles are arranged in the cylinder body, each baffle divides the cylinder body into a plurality of sub-tanks, each baffle is provided with a filter screen, the bottom of each sub-tank is provided with a drain outlet, and the cylinder wall of each sub-tank is provided with an oil drain outlet; a pH meter is arranged in the cylinder body, the cylinder body is provided with a water suction pump, and a water outlet of the cylinder body is provided with a control valve. The waste water quality before advanced waste water treatment is effectively improved, and the defects that an ultrafiltration membrane and a reverse osmosis membrane for advanced waste water treatment are seriously damaged and the like are overcome.

Description

A wastewater advanced pretreatment grease trap

technical field

The utility model relates to the field of waste water treatment, in particular to a waste water deep pretreatment grease trap.

Background technique

The wastewater advanced treatment system has high requirements on the quality of the influent water, especially the influent water must not contain oil, because oil pollution is very corrosive to the ultrafiltration and reverse osmosis membranes of the wastewater advanced treatment system.

Due to the poor quality of the drainage water in the smelting branch and the motorized branch factory, it often contains a large amount of suspended solids, which causes the clogging of the waste water precision filter element, frequent replacement, and high cost of spare parts; and the drainage water often contains a large amount of oil, resulting in advanced treatment of wastewater Ultrafiltration membrane, The reverse osmosis membrane is seriously damaged. In order to effectively reduce the replacement frequency of wastewater precision filter elements, reduce the cost of spare parts, and effectively protect wastewater advanced treatment system membrane systems and other equipment, it is necessary to perform degreasing and suspended solids pretreatment on smelting wastewater.

Utility model content

The purpose of the utility model is to provide a waste water deep pretreatment grease trap, which can effectively improve the water quality of the waste water before the waste water deep treatment, and avoid the serious damage of the ultrafiltration membrane and the reverse osmosis membrane of the waste water deep treatment.

For realizing the utility model purpose, the technical scheme that adopts is:

A waste water advanced pretreatment grease trap, including a cylinder body, a water inlet and a water outlet of the cylinder body, is characterized in that: the cylinder body is provided with several baffles, and each baffle divides the cylinder body into several subsections. Each baffle is provided with a filter screen, the bottom of each sub-pool is provided with a sewage outlet, and the cylinder wall of each sub-pool is provided with an oil discharge port; the cylinder is equipped with a pH meter, and the cylinder is equipped with a water pump. The water outlet is provided with a control valve.

Further, the cylinder body and the baffle are made of steel plates, which have the advantages of being able to withstand impact, high strength, and adapting to harsh environments.

Furthermore, the cylinder body and the baffle plate are provided with an anti-corrosion layer, which is beneficial to avoid corrosion of the cylinder body and the baffle plate by substances such as oil stains, and improve the service life of the cylinder body and the baffle plate.

Furthermore, the staggered arrangement of the filter screens on the adjacent baffles is beneficial to increase the residence time of the waste water in the sub-tank and fully separate the water in the waste water from oil and other sundries.

Further, the water pump is an engineering plastic pump, which has good corrosion resistance and increases the service life of the water pump.

Further, the size of the filter holes of the filter screen decreases sequentially from the sub-pools at the water inlet end to the sub-pools at the water outlet end, effectively avoiding filter screen clogging and improving the water quality of filtered wastewater.

Further, the filter screen is a steel wire filter screen, which has the characteristics of strong corrosion resistance and long service life.

The beneficial effects of the utility model:

1. When the water contains oil, the water outlet control valve is closed, and the oil and water are immiscible, and the difference in density and weight between oil and water is used. During the flow process, the oily oil that floats to the water surface is discharged from the oil discharge port, and the waste water is improved. water quality.

2. When the pH value of the wastewater treated in multiple sub-pools is still too high through the pH meter, or the water quality of the wastewater is still turbid, the wastewater is pumped out of the grease trap through the pump to avoid the loss of the wastewater entering the advanced treatment, so as to ensure that the wastewater enters Wastewater quality of advanced wastewater treatment.

3. Each sub-pool is equipped with a filter screen to filter large particles of debris and improve the quality of wastewater; the bottom of each sub-pool is provided with a sewage outlet, which is convenient for drainage and sewage during cleaning.

Description of drawings

Figure 1 is a schematic structural view of a grease trap for advanced wastewater pretreatment.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

A waste water advanced pretreatment grease trap is shown in Figure 1, including: a cylinder body 1, a baffle plate 2, a filter screen 3, an oil discharge port 4, a sewage discharge port 5, a pH meter 7, a water pump 8, a water outlet 6 and Water inlet 9, several baffle plates 2 are arranged in the cylinder body 1, and each baffle plate 2 divides the cylinder body 1 into several sub-pools, each baffle plate 2 is provided with a filter screen 3, and each sub-pool bottom is provided with Sewage outlet 5, oil outlet 4 is arranged on the cylinder wall of each sub-tank; pH meter 7 is arranged in cylinder body 1, water pump 8 is configured in cylinder body 1, and control valve is arranged in water outlet 6 of cylinder body 1.

The baffles 2 are arranged in the cylinder body 1, and can be arranged equidistantly or non-equidistantly. They can be perpendicular to each surface of the cylinder body 1 in contact with them, or they can form acute or obtuse angles in contact with the wall surface of the cylinder body 1. Way.

The water inlet 9 adopts a right-angle elbow, and the water inlet direction is perpendicular to the bottom of the sub-tank, which avoids the direct impact of waste water on the baffle plate 2 and the like.

The pH meter 7 is set in the sub-tank of the final wastewater treatment, which is beneficial to observe the pH value of the raw wastewater after entering several sub-tanks for filtration, sedimentation, and oil discharge. If it exceeds the standard, the wastewater is discharged through the pump 8. If it does not exceed the standard, the depth of the wastewater The treatment system further treats the wastewater.

The cylinder body 1 and the baffle plate 2 are steel plates, which have the advantages of impact resistance, high strength, and adaptability to harsh environments.

The cylinder block 1 and the baffle plate 2 are provided with an anti-corrosion layer, and the anti-corrosion layer is preferably an anti-corrosion paint.

The filter screens 3 on the adjacent baffles 2 are arranged in a staggered manner, and the specific staggered arrangement method is: the plane on which the baffles 2 are installed with the filter screens 3 is the baffle installation surface, and the positions of the adjacent filter screens 3 projected on the baffle installation surface can be left and right Various staggered arrangements, such as staggered, up and down, are beneficial to increase the residence time of wastewater in the sub-pools, and fully separate the water in the wastewater from oil and other sundries.

The water pump 8 is an engineering plastic pump, which has good corrosion resistance and increases the service life of the water pump 8 .

The filter screen 3 is a steel wire filter screen, which has the characteristics of strong corrosion resistance and long service life.

The size of the filter holes of the filter screen 3 decreases sequentially from the sub-pool at the water inlet end to the sub-pool at the water outlet end, effectively avoiding the clogging of the filter screen 3 and improving the water quality of filtered wastewater. Some filter screens 3 filter holes are uniformly too large and can not filter small particle debris, and its filter holes are uniformly too small or the arrangement is wrong, which will cause the filter screen 3 to be blocked, and the filtering effect cannot be achieved.

When the water contains oil, the water outlet 6 control valve is closed, and the oil and water are immiscible, and the difference in density and weight between oil and water is used. During the flow, the oily oil that floats to the water surface is discharged from the oil discharge port 4, and the waste water is improved. water quality.

When the pH value of the wastewater treated in multiple sub-pools is still too high through the pH meter 7, or the water quality of the wastewater is still turbid, the wastewater is pumped out of the grease trap through the pump 8 to avoid the loss of the wastewater entering the advanced treatment, so as to ensure that the wastewater enters Wastewater quality of advanced wastewater treatment.

Each sub-pool is provided with a filter screen 3 to filter large particles of debris and improve the water quality of wastewater; a sewage outlet 5 is provided at the bottom of each sub-pool to facilitate drainage and sewage during cleaning.

After the wastewater is pretreated by the advanced wastewater pretreatment grease trap, it is then entered into the advanced wastewater treatment system to treat the wastewater, reducing the number of filter elements used for advanced wastewater treatment by more than half, prolonging the service life of ultrafiltration membranes and reverse osmosis membranes for at least half a year. The effect is obvious.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. A waste water depth pretreatment grease trap, comprising a cylinder body, a water inlet and a water outlet of the cylinder body, is characterized in that: several baffle plates are arranged in the cylinder body, and each baffle plate divides the cylinder body into several Each sub-tank is equipped with a filter screen, the bottom of each sub-pool is provided with a sewage outlet, and the cylinder wall of each sub-pool is provided with an oil discharge port; the cylinder is equipped with a pH meter, and the cylinder is equipped with a pump. The water outlet of the cylinder body is provided with a control valve. 2. The advanced wastewater pretreatment grease trap according to claim 1, characterized in that: the cylinder body and the baffle are steel plates. 3. The advanced wastewater pretreatment grease trap according to claim 1 or 2, characterized in that: the cylinder body and the baffle are provided with an anti-corrosion layer. 4. The advanced wastewater pretreatment grease trap according to claim 1, characterized in that: the filter screens on the adjacent baffles are arranged in a staggered manner. 5. The advanced wastewater pretreatment grease trap according to claim 1, characterized in that: the water pump is an engineering plastic pump. 6. The waste water advanced pretreatment grease trap according to claim 1 or 4, characterized in that: the size of the filter holes of the filter screen decreases sequentially from the sub-pools at the water inlet end to the sub-pools at the water outlet end. 7. The advanced wastewater pretreatment grease trap according to claim 6, characterized in that: the filter is a steel wire filter.