CN113526634A - Kitchen waste water pretreatment and coagulation sedimentation integrated device and method - Google Patents
Kitchen waste water pretreatment and coagulation sedimentation integrated device and method Download PDFInfo
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- CN113526634A CN113526634A CN202110872505.7A CN202110872505A CN113526634A CN 113526634 A CN113526634 A CN 113526634A CN 202110872505 A CN202110872505 A CN 202110872505A CN 113526634 A CN113526634 A CN 113526634A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
Abstract
The invention discloses a coagulation and sedimentation integrated device and a coagulation and sedimentation integrated method for pretreatment of kitchen waste water, wherein the device is sequentially provided with a coagulation and flocculation tank, a buffering sedimentation tank and a sludge sedimentation tank according to the flow direction of the waste water; the wastewater in the coagulation flocculation tank overflows into a buffer sedimentation tank; the bottom of the buffer sedimentation tank is provided with an inclined plane, a sludge settling scraper is arranged in the buffer sedimentation tank, a side wall plate is arranged between the buffer sedimentation tank and the sludge sedimentation tank, the upper edge of the side wall plate is a water passage opening, the lower edge of the side wall plate and the edge of the inclined plane form a sludge settling passage opening, and the sludge settling scraper is matched with the inclined plane to enable sludge settling on the inclined plane to enter the sludge sedimentation tank through the sludge settling passage opening; the water outlet of the sedimentation tank is an overflow port, and a water outlet weir is arranged above the sedimentation tank and is positioned at the side of the water outlet of the sedimentation tank. The invention is not only suitable for coagulating sedimentation of kitchen waste water, but also can integrate the pretreatment and coagulating sedimentation of the kitchen waste water.
Description
Technical Field
The invention belongs to the technical field of kitchen waste water treatment, and relates to a kitchen waste water pretreatment and coagulating sedimentation integrated device and method.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The coagulating sedimentation is used for removing suspended matters in sewage and generally comprises a mixing reaction tank, a flocculation reaction tank and a sedimentation tank. In the coagulation process, a flocculating agent is usually added into the wastewater, and the flocculating agent and the wastewater are fully mixed by mechanical stirring to form fine alum flocs. Then coagulant is continuously added into the water, fine alum floc in the wastewater is coagulated into large alum floc through mechanical stirring, and the large alum floc is rapidly settled by the gravity of the alum floc. The inventor finds that most of the conventional coagulation devices for treating kitchen waste water are general coagulation sedimentation devices, and when the general coagulation sedimentation devices are applied to the field of pretreatment of kitchen waste water, the problems of poor sedimentation effect, anaerobic floating of sediment, poor water outlet effect, large maintenance workload and the like exist.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a kitchen waste water pretreatment and coagulating sedimentation integrated device and method, which are not only suitable for coagulating sedimentation of kitchen waste water, but also can integrate pretreatment and coagulating sedimentation of kitchen waste water.
In order to achieve the purpose, the technical scheme of the invention is as follows:
on one hand, the coagulation and sedimentation integrated device for pretreatment of kitchen waste water is sequentially provided with a coagulation and flocculation tank, a buffering and sedimentation tank and a sludge sedimentation tank according to the flow direction of the waste water; the wastewater in the coagulation flocculation tank overflows into a buffer sedimentation tank; the bottom of the buffer sedimentation tank is provided with an inclined plane, a sludge settling scraper is arranged in the buffer sedimentation tank, a side wall plate is arranged between the buffer sedimentation tank and the sludge sedimentation tank, the upper edge of the side wall plate is a water passage opening, the lower edge of the side wall plate and the edge of the inclined plane form a sludge settling passage opening, and the sludge settling scraper is matched with the inclined plane to enable sludge settling on the inclined plane to enter the sludge sedimentation tank through the sludge settling passage opening; the water outlet of the sedimentation tank is an overflow port, and a water outlet weir is arranged above the sedimentation tank and is positioned at the side of the water outlet of the sedimentation tank.
Compared with other waste water, the kitchen waste water has higher content of suspended matters, so that the pretreatment of the kitchen waste water generally needs larger treatment equipment for coagulating sedimentation, and the pretreatment and coagulating sedimentation integration is difficult to realize; secondly, by arranging the inclined surface and the matched mud scraper, the sedimentable mud can be conveyed to a sedimentation tank more quickly; the side wall plate is arranged again, so that water enters the sludge sedimentation tank from the water channel opening, sludge is stopped, sedimentation is better realized, sludge and water in the kitchen waste water can be better separated, and the coagulating sedimentation efficiency is further increased; from inferior, still exist in the aquatic of flowing into in the sludge sedimentation pond from the water channel mouth and can be with floating mud, through set up out the water weir at sedimentation tank delivery port side, can further block the direct discharge of the delivery port of mud sedimentation pond from floating mud that density is lighter to avoid the muddy problem of play water quality. Through the arrangement, the treatment efficiency of the device on suspended matters in the kitchen waste water is increased, so that the miniaturization and the coagulating sedimentation integration of the kitchen waste water pretreatment are realized.
On the other hand, the kitchen waste water pretreatment coagulating sedimentation integrated device is provided, kitchen waste water is subjected to coagulation and flocculation dosing and reaction, then enters a buffering sedimentation tank for continuous reaction and sludge-water pre-separation, and then enters a sludge sedimentation tank for complete sludge-water separation.
The invention has the beneficial effects that:
1. by arranging the buffer sedimentation tank, the kitchen waste water with high suspended matters can be better subjected to sludge sedimentation, and the sludge sedimentation efficiency is improved.
2. According to the invention, the side wall plates with the upper and lower openings are arranged between the sludge sedimentation tank and the buffering sedimentation tank, so that kitchen waste water can be better subjected to mud-water separation, and the supernatant of the effluent is clearer.
3. According to the invention, the water outlet weir is arranged on the side of the water outlet of the sedimentation tank, so that floating mud with relatively low density can be further prevented from being directly discharged from the water outlet of the sludge sedimentation tank, and the problem of turbid effluent quality is avoided.
4. The coagulation effect, the sludge discharge effect, the precipitation efficiency, the effluent cleanliness and other technical performances of the kitchen waste water pretreatment and coagulation precipitation integrated device for kitchen waste water provided by the invention are superior to those of the kitchen waste water pretreatment and coagulation precipitation integrated device of the existing sedimentation tank.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a coagulation and sedimentation integrated device for pretreatment of kitchen waste water according to embodiment 1 of the present invention;
FIG. 2 is a top view of the coagulation sedimentation integrated apparatus for kitchen waste water pretreatment according to embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a water outlet of the coagulation and sedimentation integrated device for kitchen waste water pretreatment provided in embodiment 1 of the present invention;
the system comprises a coagulation reaction tank 1, a coagulation medicine adding device 2, a spiral stirring device 3, a flocculation reaction tank 4, a flocculation medicine adding device 5, a buffer sedimentation tank 6, a multi-bucket sedimentation tank 7, a water outlet weir 8, an intelligent water level baffle 9, a sludge collecting tank 10, a sludge settling scraper 11, a sludge discharge pipe 12, a sludge floating scraper 13 and a side plate 14.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention provides a coagulation and sedimentation integrated device and method for kitchen waste water pretreatment, aiming at the problems of poor sedimentation effect, anaerobic floating of settled sludge, poor water outlet effect, large maintenance workload and the like when the conventional general coagulation and sedimentation device is used for pretreatment of kitchen waste water.
The invention provides a typical embodiment of a kitchen waste water pretreatment and coagulating sedimentation integrated device, which is provided with a coagulating and flocculating tank, a buffering and sedimentation tank and a sludge sedimentation tank in sequence according to the flow direction of waste water; the wastewater in the coagulation flocculation tank overflows into a buffer sedimentation tank; the bottom of the buffer sedimentation tank is provided with an inclined plane, a sludge settling scraper is arranged in the buffer sedimentation tank, a side wall plate is arranged between the buffer sedimentation tank and the sludge sedimentation tank, the upper edge of the side wall plate is a water passage opening, the lower edge of the side wall plate and the edge of the inclined plane form a sludge settling passage opening, and the sludge settling scraper is matched with the inclined plane to enable sludge settling on the inclined plane to enter the sludge sedimentation tank through the sludge settling passage opening; the water outlet of the sedimentation tank is an overflow port, and a water outlet weir is arranged above the sedimentation tank and is positioned at the side of the water outlet of the sedimentation tank.
The invention firstly can better precipitate the sludge in the kitchen waste water with high suspended matters by arranging the buffer sedimentation tank; secondly, by arranging the inclined surface and the matched mud scraper, the sedimentable mud can be conveyed to a sedimentation tank more quickly; the side wall plate is arranged again, so that water enters the sludge sedimentation tank from the water channel opening, sludge is stopped, sedimentation is better realized, sludge and water in the kitchen waste water can be better separated, and the coagulating sedimentation efficiency is further increased; from inferior, still exist in the aquatic of flowing into in the sludge sedimentation pond from the water channel mouth and can be with floating mud, through set up out the water weir at sedimentation tank delivery port side, can further block the direct discharge of the delivery port of mud sedimentation pond from floating mud that density is lighter to avoid the muddy problem of play water quality. Through the arrangement, the treatment efficiency of the device on suspended matters in the kitchen waste water is increased, so that the miniaturization and the coagulating sedimentation integration of the kitchen waste water pretreatment are realized.
In some embodiments of this embodiment, the coagulation flocculation tank includes a coagulation reaction tank and a flocculation reaction tank, a water inlet of the coagulation flocculation tank is disposed in the coagulation reaction tank, and a water outlet of the coagulation flocculation tank is disposed in the flocculation reaction tank. The coagulation reaction is carried out firstly, and then the flocculation reaction is carried out, which is more favorable for improving the treatment efficiency of suspended matters in the kitchen waste water.
In one or more embodiments, the bottom of the coagulation reaction tank is communicated with the bottom of the flocculation reaction tank. Is favorable for increasing the time of coagulation reaction and flocculation reaction.
In one or more embodiments, the coagulation reaction tank and the flocculation reaction tank are both provided with a stirring device. Is beneficial to increasing the efficiency of coagulation reaction and flocculation reaction.
In some embodiments of the embodiment, the effluent weir, the three side plates and the bottom cover enclose a box-shaped structure, the top of the box-shaped structure is open, and the lower parts of the side plates and the bottom cover are provided with a plurality of millimeter-sized water through holes. The floating mud in the water entering the box-shaped structure is filtered by the matching of the bottom cover of the side plate.
In some embodiments of this embodiment, the mud outlet side wall of the sedimentation tank is provided with an intelligent water level baffle, and a mud floating scraper is arranged above the sedimentation tank and matched with the intelligent water level baffle. Is beneficial to increasing the treatment efficiency of the floating mud in the water.
In some embodiments of the embodiment, a sludge depositing bucket is arranged at the bottom of the sludge settling tank, and sludge deposited on the inclined surface enters the sludge depositing bucket through a sludge depositing passage.
In one or more embodiments, the mud bucket is provided with a mud pipe. Used for discharging the sludge deposited in the sludge hopper.
In some examples of this embodiment, the sludge settling tank is a multi-bucket settling tank. The multi-bucket sedimentation tank is a sedimentation tank with at least two mud buckets arranged at the bottom. The disturbance is generated to water flow through the multiple sludge accumulation hopper walls, the efficiency of sludge sedimentation is increased, and the sludge sedimentation is more facilitated.
Some examples of this embodiment include a sludge collection basin to which sludge from the sludge settling basin is delivered.
The kitchen waste water pretreatment and coagulating sedimentation integrated device comprises a buffering sedimentation tank, a sludge sedimentation tank, a coagulation and flocculation agent, a reaction tank, a sludge-water pre-separation tank and a sludge-water separation tank.
In order to make the technical solutions of the present invention more clearly understood by those skilled in the art, the technical solutions of the present invention will be described in detail below with reference to specific embodiments.
Examples
A coagulation and sedimentation integrated device for pretreatment of kitchen waste water comprises a coagulation reaction tank 1 connected with a water inlet pipe, wherein the coagulation reaction tank 1 is provided with a coagulation dosing device 2 and a spiral stirring device 3; the flocculation reaction tank 4 is provided with a flocculation chemical adding device 5 and a spiral stirring device 3, and an opening at the bottom of the side wall is communicated with the coagulation reaction tank 1; buffering sedimentation tank 6 sets up the one side of keeping away from coagulation reaction tank 1 at flocculation reaction tank 4, and the lateral wall upper portion and the flocculation reaction tank 4 intercommunication of buffering sedimentation tank 6, and another lateral wall upper portion and the 7 intercommunications of fighting of sedimentation tank 7 that fill more of buffering sedimentation tank 6, another lateral wall lower part and the 7 long-pending mud buckets of fighting sedimentation tank that fill more intercommunication.
The coagulation and sedimentation integrated device further comprises a multi-bucket sedimentation tank 7 which is arranged on one side of the buffering sedimentation tank 6 far away from the flocculation reaction tank 4, the middle part of one side wall of the multi-bucket sedimentation tank 7 is communicated with the upper part of the buffering sedimentation tank 6, and a water outlet is arranged on the upper part of the other side wall of the multi-bucket sedimentation tank 7.
Near another lateral wall of multibucket sedimentation tank 7 is provided with out mill weir 8 near delivery port one side, as shown in fig. 3, goes out mill weir 8 and encloses into box-shaped structure with curb plate 14, bottom, and the height that highly is higher than out mill weir 8 of curb plate 14, bottom lie in the bottom of box-shaped structure, and curb plate 14 lower part and bottom set up a plurality of millimeter level and cross the water hole, set up to millimeter level water dense mesh below going out mill weir 8 promptly.
The multi-bucket sedimentation tank 7 comprises a sludge discharge pipe 12, the sludge discharge pipe 12 is fixedly arranged at the bottom of the multi-bucket sedimentation tank 7 and clings to the bottom surface of the multi-bucket sedimentation tank 7, and the other end of the sludge discharge pipe 12 is communicated with the bottom of the sludge collection tank 10.
The coagulating sedimentation integrated device also comprises a mud collection tank 10, and the lower part of the mud collection tank 10 is communicated with the bottom of the multi-bucket sedimentation tank 7 through a pipeline.
The upper end of the flocculation dosing device 5 is positioned on the outer side of the top wall of the flocculation reaction tank 4, and the lower end of the flocculation dosing device 5 is positioned 5-10 cm below the upper liquid level of the coagulation stirring tank.
The lowest height of the bottom of the buffer sedimentation tank 6 is the same as the height of the top of the mud bucket of the multi-bucket sedimentation tank 7, 5% -10% of inclined drapes are uniformly arranged at the bottom of the buffer sedimentation tank 6 from the water inlet area to the water outlet area, a mud settling and mud scraping machine 11 is arranged on the slope, and automatic mud scraping is realized through an intelligent control system.
An intelligent water level baffle plate 9 is arranged at one side of the upper part of one side of the multi-bucket sedimentation tank 7, which is far away from the effluent weir, and a floating mud scraper 13 is also arranged at the same side of the multi-bucket sedimentation tank 7; the opening and closing degree of the floating mud scraper 13 is automatically adjusted according to the height of the floating mud in the multi-bucket sedimentation tank 7 under the action of an intelligent control system and an electrical system.
The coagulation and precipitation integrated device further comprises an intelligent electrical control system and a detection system, and is connected with the coagulation and addition device 2, the spiral stirring device 3, the flocculation reaction tank 4, the sludge settling and scraping machine 11, the floating sludge scraping machine 13 and the intelligent water level baffle 9, so that the full-flow intelligent control of the integrated device is realized.
The buffering sedimentation tank 6 is arranged among the multi-bucket sedimentation tank 7, the coagulation reaction tank 1 and the flocculation reaction tank 4, so that kitchen waste water with high suspended matters can be better subjected to sludge sedimentation; meanwhile, the side wall plates with openings at the upper part and the lower part are arranged between the multi-bucket sedimentation tank 7 and the buffering sedimentation tank 6, so that the kitchen waste water can be better subjected to mud-water separation, and the supernatant of the effluent is clearer. In addition, the intelligent water level baffle 9 is arranged on one side of the water outlet of the multi-bucket sedimentation tank 7, so that the problem of turbid effluent quality caused by anaerobic mud buckets due to hot summer can be solved; when detecting that the superficial mud appears in the sedimentation tank surface, and when floating mud is greater than certain degree of depth, through opening intelligent water level baffle 9, adopt the mud scraper 13 of floating mud, scrape the sediment to sludge impoundment 10 with floating mud to solve the superficial mud problem of sedimentation tank surface in summer. The embodiment provides a coagulation effect, arranges mud effect, precipitation efficiency and goes out each item technical performance such as cleanliness of water and all is superior to the integrative device of kitchen waste water pretreatment coagulating sedimentation of current sedimentation tank to the not enough of current sedimentation tank use on kitchen waste water pretreatment. The reason why the coagulation effect is better is that a large amount of large alum flocs can appear after coagulation due to high suspension of the kitchen wastewater, and the alum flocs are large, loose and easy to break. The technology arranges a transition precipitation area between the coagulation area and the precipitation area, so that alum flocs entering the precipitation area are not easy to break, and the precipitation effect is improved. Simultaneously, set up the mud scraping device in transition settling zone bottom, can realize cleaing away bottom mud fast, because of the inside certain grease that contains of kitchen waste water mud, mud is from sinking to slide, compression rate is slower, through establishing the mud scraping device, can make mud get into the settling zone bottom fast, realizes the separation of muddy water fast, reduces the settling time more than half, has improved precipitation efficiency, and the SS of play water also falls to below 500mg/L by original 2000 ~ 4000 mg/L.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A kitchen waste water pretreatment and coagulation sedimentation integrated device is characterized in that a coagulation flocculation tank, a buffering sedimentation tank and a sludge sedimentation tank are sequentially arranged according to the waste water flow direction; the wastewater in the coagulation flocculation tank overflows into a buffer sedimentation tank; the bottom of the buffer sedimentation tank is provided with an inclined plane, a sludge settling scraper is arranged in the buffer sedimentation tank, a side wall plate is arranged between the buffer sedimentation tank and the sludge sedimentation tank, the upper edge of the side wall plate is a water passage opening, the lower edge of the side wall plate and the edge of the inclined plane form a sludge settling passage opening, and the sludge settling scraper is matched with the inclined plane to enable sludge settling on the inclined plane to enter the sludge sedimentation tank through the sludge settling passage opening; the water outlet of the sedimentation tank is an overflow port, and a water outlet weir is arranged above the sedimentation tank and is positioned at the side of the water outlet of the sedimentation tank.
2. The kitchen waste pretreatment and coagulation-sedimentation integrated device as claimed in claim 1, wherein the coagulation-flocculation tank comprises a coagulation reaction tank and a flocculation reaction tank, a water inlet of the coagulation-flocculation tank is arranged in the coagulation reaction tank, and a water outlet of the coagulation-flocculation tank is arranged in the flocculation reaction tank.
3. The kitchen waste pretreatment coagulation sedimentation integrated device as claimed in claim 2, wherein the coagulation reaction tank and the flocculation reaction tank are communicated with each other at the bottom;
or the coagulation reaction tank and the flocculation reaction tank are both provided with stirring devices.
4. The kitchen waste pretreatment and coagulation sedimentation integrated device as claimed in claim 1, wherein the effluent weir, the three side plates and the bottom cover enclose a box-shaped structure, the top of the box-shaped structure is open, and the lower parts of the side plates and the bottom cover are provided with a plurality of millimeter-sized water through holes.
5. The integrated kitchen waste pretreatment, coagulating and precipitating device as claimed in claim 1, wherein the intelligent water level baffle is disposed on the sludge outlet side wall of the sedimentation tank, and a sludge floating scraper is disposed above the sedimentation tank and is matched with the intelligent water level baffle.
6. The integrated kitchen waste pretreatment, coagulating and precipitating device according to claim 1, wherein a sludge hopper is provided at the bottom of the sludge settling tank, and sludge on the inclined surface enters the sludge hopper through a sludge passage port.
7. The integrated kitchen waste pretreatment, coagulating and precipitating device according to claim 6, wherein the sludge accumulating hopper is provided with a sludge discharge pipe.
8. The integrated kitchen waste pretreatment, coagulating and precipitating device according to claim 1, wherein the sludge settling tank is a multi-bucket settling tank.
9. The integrated kitchen waste pretreatment, coagulating and precipitating device according to claim 1, comprising a sludge collecting tank, wherein sludge in the sludge settling tank is transferred to the sludge collecting tank.
10. A kitchen waste water pretreatment coagulating sedimentation method is characterized in that the kitchen waste water pretreatment coagulating sedimentation integrated device is provided according to any one of claims 1 to 9, kitchen waste water is subjected to coagulation and flocculation dosing and reaction, then enters a buffering sedimentation tank for continuous reaction and sludge-water pre-separation, and then enters a sludge sedimentation tank for sludge-water complete separation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2021108450054 | 2021-07-26 | ||
| CN202110845005 | 2021-07-26 |
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| CN113526634A true CN113526634A (en) | 2021-10-22 |
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| CN212523136U (en) * | 2020-04-30 | 2021-02-12 | 河南发恩德矿业有限公司 | Sedimentation tank for treating well kick of underground mine |
| CN113120992A (en) * | 2020-01-13 | 2021-07-16 | 江苏开放大学（江苏城市职业学院） | Oil separation sedimentation tank |
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2021
- 2021-07-30 CN CN202110872505.7A patent/CN113526634A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3049431B1 (en) * | 1999-06-09 | 2000-06-05 | 正治 石川 | Purification equipment for sludge-containing wastewater |
| CN104556287A (en) * | 2015-01-31 | 2015-04-29 | 山东华能金昊环境工程股份有限公司 | Oil-water-mud combined separator for sewage treatment |
| CN105107241A (en) * | 2015-09-11 | 2015-12-02 | 广州擎天材料科技有限公司 | Secondary sedimentation tank system capable of improving organic wastewater effluent quality and processing method |
| CN209853813U (en) * | 2019-07-04 | 2019-12-27 | 成都孚华环保科技有限公司 | High-density sedimentation tank complete device |
| CN210595747U (en) * | 2019-09-04 | 2020-05-22 | 王杨 | Sewage treatment pond mud discharging device based on environmental protection |
| CN113120992A (en) * | 2020-01-13 | 2021-07-16 | 江苏开放大学（江苏城市职业学院） | Oil separation sedimentation tank |
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