CN201678555U - A catering oily sewage treatment device - Google Patents

Abstract

The utility model discloses an oily sewage treatment device for catering, which comprises a pool body, a water inlet, a water outlet, and a pool cover, wherein the pool body includes a grease trap, a sedimentation pool, a filter pool and a biological filter tank connected in sequence. The tank is equipped with a first-level grease trap, a second-level grease trap and a third-stage grease trap connected in sequence. The floating oil collected by the three levels of grease traps is collected to the An oil storage tank. The utility model has a reasonable structure, and the sewage has a long enough flow and time to precipitate particles. Use zeolite, three-dimensional elastic materials, modified PP ball packing and multi-faceted hollow ball packing to treat different types of impurities in the sewage, so that the discharged water meets or exceeds the national sewage comprehensive discharge three-level standard.

Description

A catering oily sewage treatment device

technical field

The utility model relates to a sewage treatment device, in particular to a catering oily sewage treatment device.

Background technique

In recent years, with the development of the economy and the improvement of people's living standards, the tertiary industry, including the catering industry, has developed vigorously. As a result, the resulting environmental pollution problems have become increasingly prominent. According to incomplete statistics, the catering industry discharges hundreds of millions of tons of waste water every year, and there is an increasing trend. The waste water has a high concentration of organic matter and a low pretreatment rate. If it is discharged into the urban pipe network without treatment or if the treatment fails to meet the standard, it will put a lot of pressure on the urban sewage treatment plant. The problem is even more serious in areas where the pipeline network is not complete. Catering wastewater is directly discharged into nearby water bodies, which not only affects the environment, but also endangers people's physical and mental health. Therefore, on the basis of investigating and understanding the water quality characteristics of catering wastewater, it has become a top priority to develop efficient, economical and simple catering sewage treatment equipment, and to strengthen the management and maintenance of sewage treatment facilities.

Restricted by people's living and eating habits, the quality and quantity of catering wastewater vary greatly, and the space for catering wastewater treatment is limited, all of which limit the treatment of catering wastewater. Most of the existing catering sewage treatment devices have simple structures, and there is not enough flow and time to complete the sedimentation and separation of sewage inside them.

Utility model content

The purpose of the utility model is to provide a catering oily sewage treatment device to solve the above-mentioned problems in the prior art. The catering oily sewage treatment device in the utility model is reasonably arranged, so that the sewage has enough flow and time to complete the sedimentation, and the treated water quality reaches the standard. It can also recycle oil and make full use of resources.

The technical scheme provided by the utility model is as follows:

An oily sewage treatment device for catering, including a pool body, a water inlet, a water outlet, and a pool cover. The tank is equipped with a first-level grease trap, a second-level grease trap and a third-stage grease trap connected in sequence. The floating oil collected by the three-level grease trap is collected to the An oil storage tank.

The oil collecting pipe has a notch with an arc width of 60°-90° on one side of the pipe wall along the length; the oil collecting pipe can rotate around the axis.

The horizontal direction of the oil collecting pipe has a slope of 3-5°.

Each oil separator is equipped with a plurality of water distribution holes, and the position of the water distribution holes of the second oil separator is higher than that of the first and third oil separators. The position and height of the plate cloth water holes form a low-high-low arrangement in turn.

The sedimentation tanks are respectively provided with two layers of honeycomb fillers and placed obliquely; the lower end of the bottom layer of honeycomb fillers is higher than the water inlet of the sedimentation tanks.

The bottom of the filter tank is provided with two-stage water distribution plates, the first-stage filler is a large-grain zeolite filler, and the second-stage filler is a small-grain zeolite filler.

The aforementioned biofilter is divided into a first-stage biofilter and a second-stage biofilter. The bottom of the first-stage biofilter is evenly distributed with semi-soft three-dimensional elastic fillers. There is an outlet pipe at the bottom of the filter. There is a water outlet at the end, a ball valve is arranged on the pipe, and a switch connecting rod that can control the valve to facilitate the drainage and cleaning of the second-stage biological filter is provided.

The second-stage biological filter is equipped with four layers of fillers, the first and fourth layers are filled with modified PP fiber fillers, the second and third layers are multi-faceted hollow ball fillers, and the bottom of the filter is equipped with slag removal device.

It can be known from the above description that the utility model provides a sewage treatment device for catering, which is provided with an oil storage tank and an oil collection pipe. Thereby the oil content in the sewage is greatly reduced, and the grease obtained in the oil-water separation can be processed to obtain products such as methane, soap, animal feed and low-grade lubricating oil, making full use of resources. The height of the water holes of the three-stage oil separator is arranged in a low-high-low manner, which can isolate grease, scum and larger suspended solids in the upper layer, and isolate the sediment at the bottom of the grease trap. And ensure that the sewage has a long enough flow and time to settle the particles. Set up a sedimentation tank, a filter tank, and a two-layer biological filter tank, respectively use zeolite, three-dimensional elastic material, modified PP ball packing and multi-faceted hollow ball packing to treat different types of impurities in the sewage, so that the discharged water reaches or Exceeding the national comprehensive sewage discharge three-level standard.

Description of drawings

Fig. 1 is the utility model top view structure schematic diagram;

Fig. 2 is a schematic cross-sectional structural diagram of plane A-A in Fig. 1 .

Detailed ways

The specific embodiment of the utility model, with reference to Fig. 1 to Fig. 2, a kind of catering sewage treatment device comprises:

Grease trap

This device adopts the three-stage oil separation method, and the oil separation tank adopts the baffle design to increase the sewage flow and make the oil-water separation more thorough. Each level of oil separator is equipped with multiple water distribution holes to make the water flow uniform, and adopts a low-high-low arrangement to isolate grease, scum and larger suspended matter in the upper layer, and isolate sediment in the oil separator. bottom of the pool. At the same time, there is an oil storage tank, and the floating oil on the upper layer of the grease trap is stored in the oil storage tank through a special oil collection device, which is convenient for recovery.

The first-stage grease trap 1 is provided with a water inlet 11, and is separated from the second-stage grease trap 2 by an oil separator 12, and a row of through holes 121 are arranged near the bottom of the oil trap 12 as the first-stage grease trap 1 the water outlet. When the sewage enters the first-stage grease trap, it flows through the pool at a low horizontal velocity (2-5mm/s). During the flow, the grease with a density less than water floats to the water surface, and the particles with a density greater than water sink. at the bottom of the pool. And the upper layer of grease, scum and larger suspended solids are intercepted by the first-stage oil trap to prevent them from entering the second-stage grease trap.

The second-stage grease trap 2 is separated from the third-stage grease trap 3 by an oil separator 21, and a row of through holes 211 are arranged on the upper half of the oil separator 21 as the water outlet of the second-stage grease trap. The function and principle of this pool are similar to those of the first-stage grease trap 1. It mainly intercepts part of the oil slick and sediment impacted from the first-stage grease trap.

The third stage grease trap 3 is separated from the settling tank by a grease trap 31, and a column of through holes is arranged on the grease trap 31 as the water outlet of the third stage grease trap. The function and principle of this tank are similar to those of the second-level grease trap. It further intercepts part of the oil slick and sediment impacted from the second-stage grease trap to minimize the oil content of the sewage entering the sedimentation tank.

Oil storage tank 4 and oil collecting pipe 13: function: to collect and store grease. The oil collecting pipe 13 is arranged above the three oil traps 1, 2, 3, and the oil collecting pipe 13 has a notch with an arc width of 60°-90° along the length on one side of the pipe wall. The oil collecting pipe can rotate around the axis. When draining the oil, turn the slotting direction of the oil collecting pipe below the water level to collect the floating oil, and guide the floating oil into the oil storage tank. The horizontal direction of the oil collecting pipe has a gradient of 3° to 5°, which is convenient for the floating oil to be introduced into the oil collecting tank 4 .

Sedimentation tank 5, function: to make the suspended solids in the water settle. The sedimentation tank adopts the principle of gravity separation method. After the water flows out of the grease trap 3, it enters the sedimentation tank 5 from the bottom. The sedimentation tank 5 is provided with two layers of honeycomb fillers 51 and placed obliquely, so that the water flow rises obliquely from the lower end of the honeycomb fillers along the holes, and the rising speed is not higher than 0.9mm/s. During the ascent, most of the suspended particles aggregate and become larger and then settle. The horizontal height of the lower end of the bottom honeycomb filler is higher than the water inlet 311 of the sedimentation tank, so that the water flow has enough buffer time to ensure the time required for the sedimentation of suspended solids.

Filter pool 6: Function: Intercept suspended solids in water. This device adopts two-stage filter pool. The water flow enters the first stage filter tank 61 after flowing out from the sedimentation tank. The water flow direction of the first-stage filter tank is from bottom to top, and the bottom of this filter tank is equipped with a water distribution plate, which can ensure that the water flow evenly passes through the filter material and the filter material will not fall into the sedimentation tank; the filler is a large particle zeolite filler , when the water flows through the filter pool, the water flows out of the pool through the zeolite gap, and the suspended matter in the water is intercepted by the zeolite. After leaching out the zeolite filler, the water flows into the second-stage filter tank 62 through the second water distribution plate and filter cloth. The filler in the second-stage filter tank is a small particle zeolite filler. The effluent continues to rise and passes through the triangular overflow plate 63. It can make the filtration uniform, ensure the filtration effect, and play the role of buffering water volume at the same time. The zeolite used in the first and second filter tank fillers is activated zeolite, which is made of natural zeolite activated by a variety of special processes. Not only the gap between the zeolite is smaller, it can further intercept the suspended matter in the water, and its adsorption performance is better than that of Natural zeolites are stronger and have better ion exchange properties. It can not only remove turbidity, color and peculiar smell in water, but also harmful heavy metals (such as: chromium, cadmium, nickel, zinc, mercury, iron ions, etc.) Nitrogen, ammonia nitrogen, phosphate ions, etc.) have adsorption and exchange effects, and are also conducive to the removal of various micro-pollutants in water, and the water leachate is not toxic.

First-stage biological filter 71: Function: absorb and intercept oil and suspended solids in water, and reduce COD. After the water flows out from the triangular overflow plate 63, it enters the first-stage biofilter 7, and semi-soft three-dimensional elastic packing 71 is evenly distributed on the bottom thereof. It has the advantages of high load impact resistance, remarkable treatment effect, simple operation and management, no clogging, and no agglomeration. The organisms on the filler can decompose the organic matter in the water well, and on the other hand, it can buffer the impact of the instantaneous high flow of catering sewage. A water pipe is arranged at the bottom of the filter, and the lower end of the pipe is provided with a water outlet, and a ball valve 72 is arranged on the pipe, and the switch of the valve can be controlled by a connecting rod, so as to facilitate drainage and cleaning of the second-stage biofilter.

Second-stage biofilter 8: Function: Absorb and intercept oil and suspended solids in water to reduce COD. The biofilter is equipped with four layers of fillers, and the water flows from bottom to top. The first and fourth layers are filled with modified PP fiber fillers 81 and 83 respectively, which can absorb tiny oil droplets and re-adsorb tiny particles. Suspended matter, the second and third layers are multi-faceted hollow ball fillers 82, the middle part of the multi-faced hollow ball has a reinforcement ring along the entire perimeter, and the upper and lower parts of the ring have 12 ball petals, arranged radially along the central axis . The ball has high gas velocity, large blades, small resistance, and large specific surface area. After the water flows through two layers of fillers, the turbidity, oil, and COD of the effluent water can meet the third-level discharge standards. At the same time, in order to prevent too much pollutants on the surface of the filler, the large particles of suspended matter will sink to the bottom of the tank after being combined, so a slag remover 84 is provided at the bottom of the filter tank to facilitate regular removal of bottom sludge. In order to facilitate the regular cleaning of PP fiber balls and multi-faceted hollow balls, each layer of the biofilter is an independent layer, separated by water distribution boards, and the water surface can be raised separately if necessary. This is convenient for maintenance personnel to disassemble and clean. After four layers of fillers, after the water distribution board with several small holes is drilled through one deck, the outlet water is discharged from the water outlet 85.

The above is only a specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial modification of the utility model by using this concept shall be an act of violating the protection scope of the present utility model .

Claims (8)

1. A catering oily sewage treatment device, comprising a pool body, a water inlet, a water outlet, and a pool cover, characterized in that: the pool body includes sequentially connected grease traps, sedimentation tanks, filter pools and biological filters, wherein The part of the grease trap is provided with a first-level grease trap, a second-stage grease trap and a third-stage grease trap connected in sequence, and the floating oil collected by the three-level grease trap passes through the The oil collection pipes on the top converge to an oil storage tank. 2. A kind of oily sewage treatment device for catering as claimed in claim 1, characterized in that: said oil collecting pipe has a notch with an arc width of 60°-90° on one side of the pipe wall along the length; the oil collecting pipe can be wound around Axis rotation. 3. A catering oily sewage treatment device as claimed in claim 2, characterized in that: the horizontal direction of the oil collecting pipe is set at a slope of 3-5°. 4. A catering oily sewage treatment device as claimed in claim 1, characterized in that: each stage of oil separator is provided with a plurality of water distribution holes, wherein the position of the water distribution holes of the second stage oil separator is higher than that of the first stage The water distribution holes of the first oil separator and the third oil separator, and the position height of the water distribution holes of the third oil separator form a low-high-low arrangement in turn. 5. A kind of catering oily sewage treatment device as claimed in claim 1, characterized in that: said settling tanks are respectively provided with two layers of honeycomb packing and placed obliquely; . 6. A kind of catering oily sewage treatment device as claimed in claim 1, characterized in that: the bottom of the filter tank is provided with two-stage water distribution boards, the first-stage filler is a large particle zeolite filler, and the second-stage filler It is a small particle zeolite filler. 7. A kind of catering oily sewage treatment device as claimed in claim 1, characterized in that: the biofilter is divided into a first-stage biofilter and a second-stage biofilter, and the bottom of the first-stage biofilter The semi-soft three-dimensional elastic packing is evenly distributed. There is a water outlet pipe at the bottom of the filter, and a water outlet is opened at the lower end of the pipe. There is a ball valve on the pipe, and there is also a valve that can control the valve to facilitate the drainage of the second-stage biological filter. And clean the switch connecting rod. 8. A kind of catering oily sewage treatment device as claimed in claim 7, characterized in that: said second-stage biological filter is provided with four layers of fillers, and the first and fourth layers are filled with modified PP fibers Filling, the second layer and the third layer are multi-faceted hollow ball packing, and a slag remover is installed at the bottom of the filter.

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