CN201660510U - A catering wastewater degreaser - Google Patents

Abstract

The utility model relates to a catering wastewater treatment device, in particular to a catering wastewater treatment device which integrates dosing and mixing, electric flocculation precipitation and air flotation separation, and is especially suitable for removing oil in catering wastewater. It is mainly composed of a reactor 1, a medicine storage box 2, a DC power supply 3, a support 4 and a tubular mixer 5. The waste water enters the reaction zone 18 of the reactor 1 after being fully mixed with the added flocculant in the mixer 5 . Under the action of an external electric field, a large number of microbubbles are generated by electrolysis of the flocculated wastewater, and the bubbles absorb oil and suspended solids in the wastewater and float to the surface of the wastewater to play the role of air flotation. The utility model has the characteristics of small installation area, simple structure, high system integration, convenient operation and management, good oil removal effect, large processing capacity, stable effluent quality and low operating cost.

Description

A catering wastewater degreaser

technical field

The utility model relates to a waste water treatment device, in particular to a catering waste water treatment device, in particular to a catering waste water degreaser.

Background technique

With the rapid development of urban catering service industry, the pollution of oily sewage produced by this industry to the environment is also becoming more and more serious. Catering wastewater contains a large amount of animal and vegetable oils and suspended solids. These substances are discharged directly without treatment, which not only increases the load of urban sewage treatment plants, affects the capacity of urban drainage pipe networks, but also deteriorates water quality. Therefore, the research on the degreasing device for catering wastewater has certain environmental benefits for reducing water pollution and protecting the environment.

At present, there are many research reports on degreasers for catering wastewater, mainly focusing on the use of coagulation technology, biotechnology, and membrane bioreactor combination technology, electrochemical and other methods. For example, the utility model patent with the publication number CN02261286.6 - a new type of catering wastewater processor, uses the principles of dosing and mixing, inclined tube precipitation, and air flotation to continuously analyze oil and solid particles in sewage. The device is simple in structure and easy to operate, but It occupies a large area, has low operating costs and needs to add chemicals, which makes the cost of wastewater treatment too high; the invention patent of publication number CN200310100829.0-wastewater purification device adopts electric floating device and co-pipe device, and is equipped with a chemical dosing box , oil skimming device, clear water tank and sludge tank are a kind of integrated electrochemical purification device for catering fee water, but the device has the disadvantages of complicated structure, high manufacturing cost and large energy consumption.

Judging from the current situation of catering wastewater treatment, a variety of technologies can be applied to the treatment of catering wastewater, but from a practical point of view, so far, there is no mature practical technology for catering wastewater treatment, which generally occupies a large area and the treatment effect is unstable. and other shortcomings. Therefore, it is necessary to find an economical, practical, and universally popularized catering wastewater degreasing process, and develop integrated treatment equipment for catering wastewater, which integrates oil removal, organic matter reduction, and suspended solids removal, which saves land and investment. A development direction of processing technology.

Contents of the invention

The purpose of the utility model is to provide an integrated catering wastewater degreasing equipment with small footprint, low investment, simple equipment, good degreasing effect, large processing capacity and low operating cost.

In order to achieve the above object, the technical scheme adopted in the utility model is as follows:

The utility model relates to a catering wastewater degreaser, which is designed as a catering wastewater treatment device integrating dosing and mixing, electrocoagulation precipitation, and air flotation separation. It is mainly composed of reactor, tube mixer, medicine storage tank, DC power supply and support. The front end of the tubular mixer is respectively connected with a waste water inlet pipe and a dosing pipe, and the added flocculant is rapidly and evenly mixed with the waste water under the three effects of counter flow, cross mixing and reverse swirl generated by the mixer. , to achieve the purpose of instant and rapid mixing, the mixing rate reaches 90-95%. The upper end of the dosing pipe is connected with the medicine storage box, and a flow meter and a valve are arranged on it to control the flow of dosing medicine. There is a liquid level display window on the medicine storage box, which is used to observe the amount of remaining medicine in the medicine storage box, so as to replenish medicine in time. The water inlet pipe extends into the reactor, and a horn-shaped water inlet is provided at the end of the water inlet pipe. A clapboard is installed in the reactor, and the upper end is connected with the inner wall of the reactor, and the reactor is divided into a reaction zone and a drainage zone. When the sludge reaches a certain amount, open the valve on the sludge discharge pipe to discharge the sludge. There is a pair of vertical electrode plates in the reaction area. The distance between the two plates is controlled according to the water quality of the wastewater, and they are respectively connected to the terminals of the DC power supply through wires. The output voltage of the DC power supply is 10-30V, and the output current is 0-5A. A large number of micro-bubbles are generated by electrolysis of flocculated wastewater, which absorb animal and vegetable oils and suspended solids in the wastewater and float to the surface of the wastewater. A slag discharge port is provided at the upper end of the reactor. The slag outlet of the device is discharged. The electrode plate can be made of iron plate, aluminum plate or graphite electrode. The wastewater treated by air flotation separation and flocculation sedimentation is deflected from the bottom of the baffle and enters the drainage area, and is discharged from the outlet. In order to facilitate the accumulation of floating oil slag and the deposition of heavy flocculated sludge, the upper and lower parts of the reactor are respectively set as inclined slopes, so that the scum and flocculated sludge can be concentrated, so as to reduce the oil residue discharged from the slag discharge port and the sludge discharge port. and sludge moisture content.

The support is composed of a lower shelf, a support column and an upper shelf, the reactor is fixed on the lower shelf of the support, and the medicine storage box and the DC power supply are placed on the upper shelf of the support.

The utility model integrates dosing and mixing, electric flocculation precipitation and air flotation separation, and is equipped with a bracket, which has the characteristics of small footprint, low investment, simple equipment, good oil removal effect, large processing capacity and low operating cost. Tests show that the utility model removes more than 75% of COD and BOD in catering wastewater, and the removal rate of animal and vegetable oils exceeds 95%.

Description of drawings

Fig. 1 is a structural schematic diagram of the catering waste water degreasing device of the present invention.

Among them, 1 reactor, 2 medicine storage box, 3 DC power supply, 4 support, 5 tube mixer, 11 electrode plate, 12 water inlet, 13 water inlet pipe, 14 water outlet, 15 mud discharge pipe, 151 control valve, 16 Slag discharge port, 17 partition, 18 reaction area, 19 drainage area, 10 sedimentation area, 21 dosing pipe, 22 liquid level display window, 211 valve, 212 flow meter, 31 electric wire, 32 binding post, 41 bracket lower shelf , 42 bracket columns, 43 bracket upper shelf.

Detailed ways

As shown in Figure 1, the utility model is mainly made up of reactor 1, medicine storage box 2, DC power supply 3, support 4 and tubular mixer 5. The front end of the tubular mixer 5 is respectively connected with a waste water inlet pipe 13 and a dosing pipe 21. The dosing pipe 21 is made of acid and alkali resistant PVC pipe. Meter 212 is used to control the flow of dosing agents. In order to observe the medicine capacity in the medicine storage box 2 conveniently, a liquid level display window 22 is also provided on the medicine storage box 2 . The water inlet pipe 13 extends into the reactor 1, and a horn-shaped water inlet 12 is provided at the end of the water inlet pipe 13. A partition 17 is installed in the reactor 1, and the upper end of the partition 17 is connected with the inner wall of the reactor 1. One side of the partition 17 is a reaction zone 18, the other side is a drainage zone 19, and the bottom of the reactor 1 is a sedimentation zone 10. A mud discharge pipe 15 is provided at the bottom of the reactor 1, and a control valve 151 is installed on the mud discharge pipe 15. A pair of upright electrode plates 11 are arranged in the reaction zone 18, and the material of the electrode plates 11 can be graphite, iron, or aluminum. Connect with the terminals 32 of the DC power supply 3 through electric wires 31, and a slag discharge port 16 is provided at the upper end of the reactor 1, and the oil residue can be automatically discharged from the slag discharge port 16 as the oil residue floats up and gathers. A drain port 14 is provided on the side of the drain area 19 of the reactor 1 , and the wastewater treated by air flotation separation and flocculation sedimentation is deflected from the bottom of the baffle plate 17 into the drain area 19 and discharged from the drain port 14 . Support 4 is made up of lower shelf 41, support column 42, upper shelf 43, and reactor 1 is fixed on the support lower shelf 41, and medicine storage box 2 and DC power supply 3 are placed on the support upper shelf 43.

Example 1

Oily waste water from a certain canteen is introduced from the water inlet pipe 13, and the control valve 211 of the dosing pipe is opened at the same time, and the flow of the medicine is adjusted as required. The medicament and the waste water are rapidly and evenly mixed under the three actions of the tubular mixer 5, which are counter flow, cross mixing and reverse swirl. The waste water mixed with flocculant enters the reaction zone 18 of the reactor 1 from the water inlet 12 . The pole plate 11 is made of graphite material, and the pole plate 11 is connected to the positive and negative terminals 32 of the DC power supply 3, the power supply is adjusted, the voltage between the pole plates is controlled at 20V, electrolytic reaction occurs in the reaction zone 18 of the reactor 1, and the hydraulic retention time is controlled at 20V. 20-30min to ensure sufficient electrolysis reaction. Electrolysis produces a large amount of tiny bubbles of hydrogen and oxygen. The bubbles absorb oily substances and suspended solids in the water and float together to play the role of air flotation and separation. Since the reactor 1 is provided with a partition 17 , the floating oil is collected at the top of the reactor 1 and then discharged from the slagging outlet 16 . The flocs heavier than water gather and concentrate in the settling zone 10 of the reactor 1. When a certain volume is reached, the control valve 151 connected to the mud discharge pipe 15 is opened to discharge the deposited flocs. The waste water treated by air flotation separation and flocculation sedimentation is deflected from the bottom of the baffle plate 17 into the drainage area 19 and discharged from the water outlet 14 . After testing, the utility model can remove more than 75% of COD and BOD in catering wastewater, and more than 95% of oily substances.

Example 2

Embodiment 1 is basically the same as the embodiment, except that iron or aluminum plate is used as the pole plate 11 . Under the action of a DC electric field, the soluble anode can generate a large amount of metal cations, which strengthens the flocculation effect.

Claims (4)

1. a catering waste water processor, is characterized in that, comprises reactor (1), medicine storage box (2), DC power supply (3), support (4), tubular mixer (5), electrode plate (11 ), water inlet (12), water inlet pipe (13), drain outlet (14), mud discharge pipe (15), control valve (151), slag discharge port (16), clapboard (17), dosing pipe ( 21), valve (211), flow meter (212), liquid level display window (22), electric wire (31) and terminal post (32); described inlet pipe (13) is connected with tubular mixer (5), The tubular mixer (5) is connected with a dosing pipe (21), and the upper end of the dosing pipe (21) communicates with the medicine storage box (2) through a pipeline, and the pipeline is provided with a valve (211) and A flow meter (212) is provided with a liquid level display window (22) on the medicine storage tank (2); the water inlet pipe (13) extends into the reactor (1), and at the end of the water inlet pipe (13) A trumpet-shaped water inlet (12) is provided; a partition (17) is installed in the reactor (1), and the upper end of the partition (17) is connected with the inner wall of the reactor (1), and one side of the partition (17) is The reaction zone (18), the other side is a drainage zone (19), and the bottom of the reactor (1) is a sedimentation zone (10); the bottom of the reactor (1) is provided with a sludge discharge pipe (15), and the sludge discharge pipe (15) is equipped with a control valve (151); a pair of upright electrode plates (11) are set in the reaction zone (18), connected to each other with the terminal (32) of the DC power supply (3) by wires (31); A slagging outlet (16) is provided at the upper end of the reactor (1); and a drain outlet (14) is provided at the side of the drainage area (19) of the reactor (1). 2. A kind of catering waste water processor according to claim 1, is characterized in that, also comprises support (4), and described support (4) is made up of lower shelf (41), support column (42), upper shelf (43) composition, reactor (1) is fixed on the support lower shelf (41), and medicine storage box (2) and DC power supply (3) are placed on the support upper shelf (43). 3. A catering wastewater processor according to claim 1, characterized in that, the electrode plate (11) is made of graphite, iron or aluminum. 4. A catering waste water processor according to claim 1, 2 or 3, characterized in that the dosing pipe (21) is an acid and alkali resistant PVC pipe. the

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