CN211111442U - Oil removal and sand removal system for kitchen sewage - Google Patents
Oil removal and sand removal system for kitchen sewage Download PDFInfo
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- CN211111442U CN211111442U CN201921823861.4U CN201921823861U CN211111442U CN 211111442 U CN211111442 U CN 211111442U CN 201921823861 U CN201921823861 U CN 201921823861U CN 211111442 U CN211111442 U CN 211111442U
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Abstract
The utility model relates to a meal kitchen sewage's oil removal degritting system belongs to the waste water treatment field. The system comprises a grid pool, a water collecting pool, an oil separation sedimentation pool, a flocculation sedimentation pool, an air floatation machine, a fine grid and a buffer pool which are sequentially connected along the sewage conveying direction, sludge outlets on the oil separation sedimentation pool and the flocculation sedimentation pool are connected with the sludge thickening pool through sludge conveying pipelines, floating oil outlets on the air floatation machine and the oil separation sedimentation pool are connected with an oil residue storage tank through floating oil conveying pipelines, a steam pipeline is paved in the water collecting pool, and a plurality of steam holes capable of releasing steam are arranged on the steam pipeline. The system can improve the removal effect of grease and various suspended solids, thereby reducing the influence of the grease and suspended solids on a subsequent biochemical system and a membrane system.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, concretely relates to oil removal degritting system of meal kitchen sewage.
Background
The kitchen waste water is waste water generated after anaerobic fermentation of the kitchen waste and waste water generated in other working procedures of kitchen waste treatment, and the components of the waste water are complex, so that the kitchen waste water belongs to high-concentration organic waste water with high treatment difficulty. The kitchen waste contains abundant protein, and after the protein is digested and decomposed, the sewage of the kitchen waste has high-level ammonia nitrogen and total nitrogen concentration, so that the carbon-nitrogen ratio is low, and the biodegradability is general. Meanwhile, with the improvement of the living standard of residents, more and more oil substances and suspended matters are contained in the kitchen waste sewage, wherein the oil substances can block the contact between the waste water and the sludge, so that the biochemical removal efficiency is reduced; the suspended matters mainly comprise vegetable particles, insoluble protein and fibrous insoluble organic matters, and are not easy to biochemically treat.
At present, the kitchen sewage treatment mainly adopts a process route combining several or more process units such as anaerobic biological treatment, aerobic biological treatment, membrane technology treatment and the like. The method comprises the following steps of firstly carrying out pretreatment to remove solid impurities, oil content, sticky substances and the like in the wastewater, then respectively carrying out acidification and removal on organic matters in the wastewater by anaerobic and aerobic bioreactors, and finally carrying out reverse osmosis membrane treatment and then discharging, namely the combined process of pretreatment, anaerobic treatment, aerobic treatment and advanced treatment (reverse osmosis membrane filtration). The process has certain defects that the pretreatment process is simple and can not efficiently remove the grease and suspended matters contained in the sewage. The oil substances in the kitchen sewage can not only reduce the efficiency of biochemical treatment, but also cause membrane blockage with other indissolvable suspended matters, so that the service life of the membrane is shortened, and the generated concentrated solution needs to be treated in another complex process, thereby easily causing secondary pollution and generating higher cost.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a meal kitchen sewage's oil removal sand removal system, this system can carry out the preliminary treatment to oils and suspended solid in the meal kitchen sewage to for technologies such as follow-up biochemical treatment raise the efficiency, reduce cost.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an oil separation and sand removal system for kitchen sewage comprises a grating tank, a water collecting tank, a sludge concentration tank, a buffer tank, an oil residue storage tank, an oil separation sedimentation tank, a flocculation sedimentation tank and an air floatation treatment system;
wherein the air floatation treatment system comprises an air floatation machine and a fine grid; along the sewage conveying direction, the grid tank, the water collecting tank, the oil separation sedimentation tank, the flocculation sedimentation tank, the air flotation machine, the fine grid and the buffer tank are connected in sequence through a sewage conveying pipeline; the sludge outlets on the oil separation sedimentation tank and the flocculation sedimentation tank are connected with the sludge concentration tank through sludge conveying pipelines; the floating oil outlet on the air flotation machine and the oil separation sedimentation tank are connected with the oil residue storage tank through a floating oil conveying pipeline;
a steam pipeline is laid in the water collecting tank, and a plurality of steam holes capable of emitting steam are arranged on the steam pipeline.
Further, the grid pool comprises two levels of grids, the gap of the grid bars of one level of grid is 20mm, and the gap of the grid bars of the other level of grid is 10 mm.
Further, the effluent of the water collecting tank enters an oil separation settling tank through a lifting pump.
Furthermore, a sludge discharge pump connected with a sludge conveying pipeline is arranged in both the oil separation sedimentation tank and the flocculation sedimentation tank.
Further, the gap between the grid bars of the fine grid arranged behind the air floatation machine is 5 mm.
Furthermore, a lifting pump is arranged in the buffer pool and is connected with a subsequent biochemical treatment system through a water outlet pipeline.
The beneficial effects of the utility model reside in that:
1. by adopting the oil-separating sedimentation tank, oil-water separation and solid-liquid separation can be carried out simultaneously, and the multi-purpose function of one tank is exerted; the floor space is reduced, the cost is saved, and the management is easy.
2. The water collecting tank can be subjected to steam heating treatment, so that the phenomenon that the pipeline and equipment are blocked due to the condensation of grease can be avoided, and the effect of the medicament in the subsequent process cannot be influenced; the oil content in the sludge can be reduced, and the treatment efficiency of the grease in the wastewater is improved.
3. In the air floatation treatment system, a fine grid is arranged behind an air floatation machine, so that fine suspended matters can be intensively removed, and the influence of the suspended matters on a membrane system is reduced; and the medicament in the pretreatment system is prevented from entering the subsequent treatment to influence the normal growth of the microorganisms.
4. The combined use of several technologies aims at the condition that the oil content and the suspension in the kitchen sewage in the southwest region are high, and the combined use of the grating pool, the oil separation sedimentation pool, the flocculation sedimentation pool and the air floatation machine effectively reduces the oil content and the suspended matter content, avoids the treatment effect from being influenced by the attachment of the oil stain on subsequent equipment, and ensures the service life of the equipment.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow chart of the present invention;
fig. 2 is a schematic diagram of the system of the present invention.
Reference numerals:
the system comprises a grid pool 1, a water collecting pool 2, an oil separation sedimentation pool 3, a flocculation sedimentation pool 4, an air flotation machine 5, a fine grid 6, a buffer pool 7, an oil residue storage tank 8, a water inlet pipeline 9, a sludge conveying pipeline 10, a water outlet pipeline 11, a floating oil conveying pipeline 12, a lifting pump 13 and a lifting pump 14.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1 to 2, the oil removal and sand removal system for kitchen sewage comprises a grid tank 1, a water collection tank 2, a sludge concentration tank, a buffer tank 7, an oil residue storage tank 8, an oil removal sedimentation tank 3, a flocculation sedimentation tank 4 and an air floatation treatment system; wherein the air floatation treatment system comprises an air floatation machine 5 and a fine grid 6; along the sewage conveying direction, a grid tank 1, a water collecting tank 2, an oil separation sedimentation tank 3, a flocculation sedimentation tank 4, an air floatation machine 5, a fine grid 6 and a buffer tank 7 are connected in sequence through a sewage conveying pipeline; sludge outlets on the oil separation sedimentation tank 3 and the flocculation sedimentation tank 4 are connected with a sludge concentration tank through a sludge conveying pipeline 10; the air flotation machine 5 and the floating oil outlet on the oil separation sedimentation tank 3 are connected with the oil residue storage tank 8 through a floating oil conveying pipeline 12; a steam pipeline is laid in the water collecting tank 7, and a plurality of steam holes capable of emitting steam are arranged on the steam pipeline.
It is specific, meal kitchen sewage at first gets into grid pond 1 through inlet channel 9, through the grid in grid pond 1, and the floater that the particle diameter is greater than the grid aperture in the sewage is by the separation, has two-stage grid in the grid pond in this embodiment, and the bars clearance of one-level grid is 20mm, and the bars clearance of another level grid is 10mm, through twice grid, filters great and less solid-state pollutant relatively in proper order, avoids sewage blocking grid, improves the treatment effeciency.
The sewage enters the water collecting tank 2 after being filtered by the grating, and a steam pipeline is laid in the water collecting tank 2 and can release steam, so that the sewage in the water collecting tank is heated. Preferably, a plurality of steam holes capable of emitting steam are arranged on the steam main pipe, and the steam is discharged from the steam holes and mixed with the sewage to heat the sewage. And by adopting steam heating, on one hand, the grease deposition can be avoided from blocking equipment, and on the other hand, the treatment efficiency of the subsequent process can be improved.
The sewage passing through the water collecting tank 2 enters an oil separation sedimentation tank 3 to separate floating oil and easily-precipitated inorganic matters in the wastewater, so that preliminary oil-water separation is realized. Wherein the oil slick gets into the dregs of fat storage tank 8 through oil slick pipeline 12, and the large granule impurity and the large granule suspended solid in the waste water deposit in separating oily sedimentation tank bottom of the pool under the effect of gravity, deposit produced mud and discharge into the sludge thickening tank.
The sewage treated by the oil separation sedimentation tank 3 enters a flocculation sedimentation tank 4, suspended particles which are difficult to degrade in the water are mutually polymerized to form colloid sediment after a medicament is added, and the sediment is also discharged into a sludge concentration tank.
The sewage treated by the flocculation sedimentation tank 4 enters an air floatation treatment system, fine grease particles and lighter suspended particles which are not removed in the early stage in the sewage are removed by an air floatation machine 5, and floc waste residues collected by a residue scraping machine of the air floatation machine are discharged into an oil residue storage tank 8. Then, the floating solids in the wastewater treated by the air flotation machine 5 are further removed by a fine grid 6.
The sewage treated by the air floatation treatment system finally enters a buffer tank 7, the balance of water quantity and water quality is carried out in the buffer tank, a lifting pump 13 is arranged in the buffer tank, and then the sewage is lifted by the lifting pump 13 and is sent to a subsequent biochemical treatment system through a water outlet pipeline 11.
In this embodiment, the effluent from the water collecting tank 2 is sent into the oil-separation sedimentation tank 3 by the lift pump 14. Meanwhile, a sludge discharge pump is arranged in each of the oil separation sedimentation tank 3 and the flocculation sedimentation tank 4 and is connected with a sludge conveying pipeline 10, and sludge is discharged into the sludge concentration tank through the sludge conveying pipeline 10 under the action of the sludge discharge pump.
As a further optimization of the scheme, the gap between the grid bars of the fine grid 6 arranged behind the air floatation machine 5 is 5 mm. The effect of air floatation treatment can be strengthened, and the influence of the grease on the subsequent process can be reduced.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (6)
1. The utility model provides a meal kitchen sewage's oil removal sand removal system, includes grid pond, catch basin, sludge thickening tank, buffer pool and dregs of fat storage tank, its characterized in that: the device also comprises an oil separation sedimentation tank, a flocculation sedimentation tank and an air floatation treatment system;
wherein the air floatation treatment system comprises an air floatation machine and a fine grid; along the sewage conveying direction, the grid tank, the water collecting tank, the oil separation sedimentation tank, the flocculation sedimentation tank, the air flotation machine, the fine grid and the buffer tank are connected in sequence through a sewage conveying pipeline; the sludge outlets on the oil separation sedimentation tank and the flocculation sedimentation tank are connected with the sludge concentration tank through sludge conveying pipelines; the floating oil outlet on the air flotation machine and the oil separation sedimentation tank are connected with the oil residue storage tank through a floating oil conveying pipeline;
a steam pipeline is laid in the water collecting tank, and a plurality of steam holes capable of emitting steam are arranged on the steam pipeline.
2. The oil and sand removal system for kitchen sewage according to claim 1, characterized in that: the grid pool comprises two levels of grids, the gap of the grid bars of one level of grid is 20mm, and the gap of the grid bars of the other level of grid is 10 mm.
3. The oil and sand removal system for kitchen sewage according to claim 1, characterized in that: the effluent of the water collecting tank enters an oil separation settling tank through a lifting pump.
4. The oil and sand removal system for kitchen sewage according to claim 1, characterized in that: and sludge pumps connected with a sludge conveying pipeline are arranged in the oil separation sedimentation tank and the flocculation sedimentation tank.
5. The oil and sand removal system for kitchen sewage according to claim 1, characterized in that: the gap between the grid bars of the fine grid arranged at the rear part of the air floatation machine is 5 mm.
6. The oil and sand removal system for kitchen sewage according to claim 1, characterized in that: the buffer pool is internally provided with a lift pump which is connected with a subsequent biochemical treatment system through a water outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921823861.4U CN211111442U (en) | 2019-10-28 | 2019-10-28 | Oil removal and sand removal system for kitchen sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921823861.4U CN211111442U (en) | 2019-10-28 | 2019-10-28 | Oil removal and sand removal system for kitchen sewage |
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| Publication Number | Publication Date |
|---|---|
| CN211111442U true CN211111442U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921823861.4U Active CN211111442U (en) | 2019-10-28 | 2019-10-28 | Oil removal and sand removal system for kitchen sewage |
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| CN (1) | CN211111442U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979073A (en) * | 2021-02-26 | 2021-06-18 | 武汉市精新印务有限公司 | Gravure printing process and printing equipment for paper packaging box |
| CN115043561A (en) * | 2022-06-20 | 2022-09-13 | 江苏澳洋环境科技有限公司 | Method for treating endogenous pollution of rivers and lakes |
-
2019
- 2019-10-28 CN CN201921823861.4U patent/CN211111442U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979073A (en) * | 2021-02-26 | 2021-06-18 | 武汉市精新印务有限公司 | Gravure printing process and printing equipment for paper packaging box |
| CN115043561A (en) * | 2022-06-20 | 2022-09-13 | 江苏澳洋环境科技有限公司 | Method for treating endogenous pollution of rivers and lakes |
| CN115043561B (en) * | 2022-06-20 | 2023-09-15 | 江苏澳洋环境科技有限公司 | Method for treating endogenous pollution of river and lake |
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