CN213680324U - Sewage treatment sludge dewatering system - Google Patents
Sewage treatment sludge dewatering system Download PDFInfo
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- CN213680324U CN213680324U CN202022584403.9U CN202022584403U CN213680324U CN 213680324 U CN213680324 U CN 213680324U CN 202022584403 U CN202022584403 U CN 202022584403U CN 213680324 U CN213680324 U CN 213680324U
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Abstract
The utility model discloses a sewage treatment sludge dewatering system, which comprises a first precipitation unit, a biological treatment unit and a second precipitation unit which are connected in sequence; the first precipitation unit is connected with a primary sludge treatment unit, the second precipitation unit is connected with a residual sludge treatment unit, and the primary sludge treatment unit and the second precipitation unit are both connected with a dehydration unit. The application provides a sewage treatment sludge dewatering system because initial sludge and excess sludge separately carry out the quenching and tempering, consequently can carry out the quenching and tempering according to the nature of every kind of mud, compare with quenching and tempering after two kinds of mud mixes, and the use amount of stench control agent can greatly reduced, can guarantee to dewater the water content reduction of filter cake simultaneously. The water content of the filter cake can be monitored in real time through the sludge water content measuring assembly and the control assembly, and the obtained water content of the filter cake can meet the design requirement all the time.
Description
Technical Field
The utility model relates to a sludge dewatering equipment technical field especially relates to a sewage treatment sludge dewatering system.
Background
At present, most sewage treatment plants adopt an activated sludge method to remove sludge. The principle of biological treatment is to convert organic pollutants into harmless gas products (CO) by biological action, especially action of microorganisms, to complete decomposition of organic matters and synthesis of organisms2) Liquid products (water) and solid products (microbial populations or biological sludges) rich in organic matter; and (4) carrying out solid-liquid separation on the redundant biological sludge in the sedimentation tank through the sedimentation tank, and removing the redundant biological sludge from the purified sewage. And drying or burying the obtained sludge after dehydration treatment.
The sludge entering the dehydration procedure mainly has two sources, one is that the initial sludge and the excess sludge after the biological treatment are obtained by the sedimentation of a sedimentation tank in the former procedure of the biological treatment, and the traditional method is that the initial sludge and the excess sludge are mixed and then are dehydrated by the same dehydration equipment. Since the initial sludge contains a large amount of substances such as phosphorus and the like, which may cause a large amount of offensive odor, it is necessary to add nitrite to the mixed sludge to prevent the generation of offensive odor, but since the excess sludge contains nitrifying bacteria, the nitrifying bacteria decompose the nitrite, which may cause a problem of a reduction in the offensive odor effect. Meanwhile, due to the fact that the sludge dewatering equipment in the prior art is lack of detection of the water content of the dewatered sludge, the water content of the dewatered sludge is possibly too high, and unnecessary burden is brought to subsequent transportation and drying.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sewage treatment sludge dewatering system.
The utility model provides a following scheme:
a sewage treatment sludge dewatering system comprises a first precipitation unit, a biological treatment unit and a second precipitation unit which are connected in sequence; the first precipitation unit is connected with a primary sludge treatment unit, the second precipitation unit is connected with a residual sludge treatment unit, and the primary sludge treatment unit and the second precipitation unit are both connected with a dehydration unit;
the first precipitation unit is used for receiving sewage to be treated so as to perform primary precipitation on the sewage to be treated to obtain initial sludge;
the primary sludge treatment unit is used for receiving the primary sludge and deodorizing and concentrating the primary sludge to obtain first concentrated sludge;
the biological treatment unit is used for receiving the first supernatant discharged by the first precipitation unit so as to carry out biological fermentation treatment to obtain fermentation liquor;
the second precipitation unit is used for receiving the fermentation liquor so as to carry out final precipitation on the fermentation liquor to obtain excess sludge;
the excess sludge treatment unit is used for receiving the excess sludge and concentrating the excess sludge to obtain second concentrated sludge;
the dehydration unit is used for receiving the first concentrated sludge and the second concentrated sludge so as to perform dehydration treatment on the first concentrated sludge and the second concentrated sludge.
Preferably: the primary sludge treatment unit comprises a first concentration unit; the first concentrating unit is used for receiving the malodor control agent and/or the cationic flocculant so as to perform deodorization concentration on the initial sludge to obtain first concentrated sludge.
Preferably: the first concentration unit comprises a concentration tank connected with the first precipitation unit and a temporary storage tank connected with the concentration tank, the concentration tank is used for receiving the initial sludge and the malodor control agent, and the temporary storage tank is used for receiving the initial sludge and the cationic flocculant which are mixed with the malodor control agent and discharged by the concentration tank.
Preferably: the excess sludge treatment unit comprises a second concentration unit for receiving an inorganic flocculant and an amphoteric polymer flocculant to concentrate the excess sludge to obtain a second concentrated sludge.
Preferably: the dehydration unit is connected with a filtrate discharge pipeline, and the filtrate discharge pipeline is connected with the biological treatment unit.
Preferably: the dehydration unit comprises a dehydration execution component, a sludge water content measurement component and a control component, and the control component is respectively connected with the dehydration execution component and the sludge water content measurement component; the control component is used for controlling the working state of the dehydration execution component according to the value of the water content of the filter cake obtained by the sludge water content measuring component.
Preferably: the sludge moisture content measuring assembly comprises an online infrared moisture meter.
Preferably: the dewatering executing component comprises any one of a filter press, a belt press, a centrifugal dewaterer and a double-screw desliming machine.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
by the utility model, a sewage treatment sludge dewatering system can be realized, and in one realization mode, the system can comprise a first precipitation unit, a biological treatment unit and a second precipitation unit which are connected in sequence; the first precipitation unit is connected with a primary sludge treatment unit, the second precipitation unit is connected with a residual sludge treatment unit, and the primary sludge treatment unit and the second precipitation unit are both connected with a dehydration unit; the first precipitation unit is used for receiving sewage to be treated so as to perform primary precipitation on the sewage to be treated to obtain initial sludge; the primary sludge treatment unit is used for receiving the primary sludge and deodorizing and concentrating the primary sludge to obtain first concentrated sludge; the biological treatment unit is used for receiving the first supernatant discharged by the first precipitation unit so as to carry out biological fermentation treatment to obtain fermentation liquor; the second precipitation unit is used for receiving the fermentation liquor so as to carry out final precipitation on the fermentation liquor to obtain excess sludge; the excess sludge treatment unit is used for receiving the excess sludge and concentrating the excess sludge to obtain second concentrated sludge; the dehydration unit is used for receiving the first concentrated sludge and the second concentrated sludge so as to perform dehydration treatment on the first concentrated sludge and the second concentrated sludge. The application provides a sewage treatment sludge dewatering system because initial sludge and excess sludge separately carry out the quenching and tempering, consequently can carry out the quenching and tempering according to the nature of every kind of mud, consequently mix the afterquenching and tempering with two kinds of mud and compare, the use amount of stench control agent can greatly reduced, can guarantee to dewater the water content reduction of filter cake simultaneously. The water content of the filter cake can be monitored in real time through the sludge water content measuring assembly and the control assembly, and the obtained water content of the filter cake can meet the design requirement all the time.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a sludge dewatering system for sewage treatment provided by an embodiment of the present invention.
In the figure: the device comprises a first precipitation unit 1, a biological treatment unit 2, a second precipitation unit 3, a primary sludge treatment unit 4, a concentration tank 41, a temporary storage tank 42, a residual sludge treatment unit 5, a dehydration unit 6, a dehydration execution component 61, a sludge water content measurement component 62, a control component 63 and a filtrate discharge pipeline 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
Examples
Referring to fig. 1, a sewage treatment sludge dewatering system provided by an embodiment of the present invention is shown in fig. 1, and the system includes a first precipitation unit 1, a biological treatment unit 2, and a second precipitation unit 3 connected in sequence; the first precipitation unit 1 is connected with a primary sludge treatment unit 4, the second precipitation unit 3 is connected with a residual sludge treatment unit 5, and the primary sludge treatment unit 4 and the second precipitation unit 5 are both connected with a dehydration unit 6;
the first precipitation unit 1 is used for receiving sewage to be treated so as to perform primary precipitation on the sewage to be treated to obtain initial sludge; the first precipitation unit may be a settling tank.
The primary sludge treatment unit 4 is used for receiving the primary sludge and deodorizing and concentrating the primary sludge to obtain first concentrated sludge; the primary sludge treatment unit 4 comprises a first concentration unit; the first concentrating unit is used for receiving the malodor control agent and/or the cationic flocculant so as to perform deodorization concentration on the initial sludge to obtain first concentrated sludge. The first concentration unit comprises a concentration tank 41 connected with the first precipitation unit and a temporary storage tank 42 connected with the concentration tank, the concentration tank is used for receiving the initial sludge and the malodor control agent, and the temporary storage tank is used for receiving the initial sludge and the cationic flocculant which are mixed with the malodor control agent and discharged by the concentration tank. The malodor control agent may be nitrate and nitrite (such as calcium nitrate and sodium nitrite), and since the initial sludge does not contain nitrifying bacteria, the nitrate or nitrite is not decomposed, and a good deodorizing effect can be achieved without adding a large amount of nitrate or nitrite. The cationic flocculant may be dimethylaminoethyl acrylate (DAA), dimethylaminoethyl methacrylate (DAM), dimethylaminopropyl acrylate, etc.
The biological treatment unit 2 is used for receiving the first supernatant discharged by the first precipitation unit 1 so as to carry out biological fermentation treatment to obtain fermentation liquor; the biological treatment unit may comprise an aerobic treatment tank and/or an anaerobic treatment tank and/or a nitrification treatment apparatus and the like.
The second precipitation unit 3 is used for receiving the fermentation liquor so as to carry out final precipitation on the fermentation liquor to obtain residual sludge; the second precipitation unit may be a settling tank.
The excess sludge treatment unit 5 is used for receiving the excess sludge and concentrating the excess sludge to obtain second concentrated sludge; the excess sludge treatment unit comprises a second concentration unit for receiving an inorganic flocculant and an amphoteric polymer flocculant to concentrate the excess sludge to obtain a second concentrated sludge. Inorganic flocculants may include ferric chloride, ferrous sulfate, polymeric ferric sulfate, aluminum chloride, aluminum sulfate, and polymeric aluminum chloride, among others.
The dewatering unit 6 is configured to receive the first concentrated sludge and the second concentrated sludge so as to dewater the first concentrated sludge and the second concentrated sludge. The dehydration unit 6 is connected with a filtrate discharge pipeline 7, and the filtrate discharge pipeline 7 is connected with the biological treatment unit 2. Returning the filtrate to the biological treatment unit ensures a more thorough treatment, in particular a thorough treatment of the liquid in the primary sludge.
Further, in order to ensure that the moisture content of the dewatered sludge meets the design requirements and prevent the excessive moisture content from affecting subsequent transportation and drying, the dewatering unit 6 comprises a dewatering execution component 61, a sludge moisture content measurement component 62 and a control component 63, wherein the control component 63 is respectively connected with the dewatering execution component 61 and the sludge moisture content measurement component 62; the control component 63 is used for controlling the working state of the dewatering execution component 61 according to the value of the water content of the filter cake obtained by the sludge water content measuring component 62. The sludge moisture content measuring assembly comprises an online infrared moisture meter. The dewatering executing component comprises any one of a filter press, a belt press, a centrifugal dewaterer and a double-screw desliming machine. The water content of the filter cake can be obtained in real time by the sludge water content measuring assembly, and when the obtained water content is higher than the preset standard water content, the control assembly can control the dehydration execution assembly to increase the rotating speed or increase the pressure, so that the obtained water content of the filter cake is reduced to meet the design requirement. It is of course conceivable that the control unit may control the dewatering execution unit to reduce the rotation speed or to reduce the pressure if the obtained moisture content is below a predetermined standard moisture content. Therefore, the energy consumption can be effectively controlled, and the aim of saving energy is fulfilled.
In a word, the sewage treatment sludge dewatering system that this application provided, because initial sludge and excess sludge are separately to carry out the quenching and tempering, consequently can carry out the quenching and tempering according to the nature of every mud, consequently compare with the quenching and tempering after two kinds of mud mixes, the use amount of stench control agent can greatly reduced, can guarantee to dewater the water content reduction of filter cake simultaneously. The water content of the filter cake can be monitored in real time through the sludge water content measuring assembly and the control assembly, and the obtained water content of the filter cake can meet the design requirement all the time.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. A sewage treatment sludge dewatering system is characterized by comprising a first precipitation unit, a biological treatment unit and a second precipitation unit which are connected in sequence; the first precipitation unit is connected with a primary sludge treatment unit, the second precipitation unit is connected with a residual sludge treatment unit, and the primary sludge treatment unit and the second precipitation unit are both connected with a dehydration unit;
the first precipitation unit is used for receiving sewage to be treated so as to perform primary precipitation on the sewage to be treated to obtain initial sludge;
the primary sludge treatment unit is used for receiving the primary sludge and deodorizing and concentrating the primary sludge to obtain first concentrated sludge;
the biological treatment unit is used for receiving the first supernatant discharged by the first precipitation unit so as to carry out biological fermentation treatment to obtain fermentation liquor;
the second precipitation unit is used for receiving the fermentation liquor so as to carry out final precipitation on the fermentation liquor to obtain excess sludge;
the excess sludge treatment unit is used for receiving the excess sludge and concentrating the excess sludge to obtain second concentrated sludge;
the dehydration unit is used for receiving the first concentrated sludge and the second concentrated sludge so as to perform dehydration treatment on the first concentrated sludge and the second concentrated sludge.
2. The wastewater treatment sludge dewatering system of claim 1, wherein the primary sludge treatment unit comprises a first thickening unit.
3. The sewage treatment sludge dewatering system of claim 2, wherein the first thickening unit comprises a thickening tank connected to the first sedimentation unit and a holding tank connected to the thickening tank.
4. The sewage treatment sludge dewatering system of claim 1, wherein the excess sludge treatment unit comprises a second thickening unit.
5. The sewage treatment sludge dewatering system of claim 1, wherein a filtrate discharge conduit is connected to the dewatering unit, the filtrate discharge conduit being connected to the biological treatment unit.
6. The sewage treatment sludge dewatering system of claim 1, wherein the dewatering unit comprises a dewatering execution component, a sludge water content measurement component, and a control component, the control component being connected to the dewatering execution component and the sludge water content measurement component, respectively; the control component is used for controlling the working state of the dehydration execution component according to the value of the water content of the filter cake obtained by the sludge water content measuring component.
7. The sewage treatment sludge dewatering system of claim 6, wherein the sludge moisture content measurement assembly comprises an online infrared moisture meter.
8. The wastewater treatment sludge dewatering system of claim 6, wherein the dewatering performing assembly comprises any one of a filter press, a belt press, a centrifugal dehydrator, a twin-screw desliming machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022584403.9U CN213680324U (en) | 2020-11-10 | 2020-11-10 | Sewage treatment sludge dewatering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022584403.9U CN213680324U (en) | 2020-11-10 | 2020-11-10 | Sewage treatment sludge dewatering system |
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| Publication Number | Publication Date |
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| CN213680324U true CN213680324U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022584403.9U Active CN213680324U (en) | 2020-11-10 | 2020-11-10 | Sewage treatment sludge dewatering system |
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| CN (1) | CN213680324U (en) |
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