CN112456742A - Sludge treatment system and method - Google Patents
Sludge treatment system and method Download PDFInfo
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- CN112456742A CN112456742A CN202011324669.8A CN202011324669A CN112456742A CN 112456742 A CN112456742 A CN 112456742A CN 202011324669 A CN202011324669 A CN 202011324669A CN 112456742 A CN112456742 A CN 112456742A
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- 238000001556 precipitation Methods 0.000 claims abstract description 43
- 230000018044 dehydration Effects 0.000 claims abstract description 41
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims description 71
- 239000004744 fabric Substances 0.000 claims description 64
- 208000005156 Dehydration Diseases 0.000 claims description 38
- 239000004576 sand Substances 0.000 claims description 36
- 238000004140 cleaning Methods 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 19
- 239000003607 modifier Substances 0.000 claims description 15
- 238000007865 diluting Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 14
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Images
Classifications
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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
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
Abstract
The application provides a sludge treatment system and method, and belongs to the technical field of river and lake sludge treatment. Comprises an impurity removing device, a precipitation device and a dehydration device. The impurity removal device can dilute the silt and remove sundries and gravels in the silt. The precipitation device can precipitate impurity-removed slurry obtained after the impurity-removed device is used for processing, and the water content of the slurry is reduced. The dewatering device can carry out concentration deep dewatering treatment on the precipitated slurry obtained after precipitation by the precipitation device, so that deep dewatering is realized, and the water content of the slurry is further reduced. This kind of silt processing system can carry out edulcoration, sediment, degree of depth dehydration to silt earlier, both effectively carries out classification to silt, reduces dewatering device's processing load again, has more meticulous separation effect and more efficient dehydration efficiency, and is better to the treatment effect of silt, realizes better environmental benefit and social.
Description
Technical Field
The application relates to the technical field of river and lake sludge treatment, in particular to a sludge treatment system and method.
Background
Due to the increase of urban population, high economic growth pressure, unreasonable industrial structure and industrial layout, low pollution treatment rate of urban life and the like, the urban inland river water gushes out animals and plants, the river water becomes black and smelly, the landscape and ecological functions are seriously degraded, and various wastes are accumulated in river banks, river channels and river surfaces, so that the originally black and smelly river water is more dirty.
The treatment of organic sludge at the bottom of black and odorous water is an effective means for solving the problem of black and odorous water, and the treatment and disposal of sludge mainly comprises methods such as a natural dehydration drying method, a geotube belt method, a common mechanical dehydration method and a stirring and solidification method at present, so that the method has the advantages of large floor area, laggard treatment process, low dehydration efficiency and poor sludge treatment effect.
Disclosure of Invention
The embodiment of the application provides a sludge treatment system and method, which aim to solve the problem that the existing sludge treatment mode is poor in treatment effect.
In a first aspect, an embodiment of the present application provides a sludge treatment system, including:
the impurity removal device is used for diluting the sludge and removing impurities and gravels in the sludge to obtain impurity removal slurry;
the precipitation device is used for precipitating the impurity-removed slurry to obtain precipitated slurry; and
and the dewatering device is used for carrying out concentration deep dewatering treatment on the precipitated slurry.
In the scheme, the impurity removing device can dilute the sludge and remove impurities and gravels in the sludge; the precipitation device can carry out precipitation treatment on the impurity-removed slurry obtained after the treatment of the impurity-removing device, so that the water content of the slurry is reduced; the dewatering device can carry out concentration deep dewatering treatment on the precipitated slurry obtained after precipitation by the precipitation device, so that deep dewatering is realized, and the water content of the slurry is further reduced. This kind of silt processing system can carry out edulcoration, sediment, degree of depth dehydration to silt earlier, both effectively carries out classification to silt, reduces dewatering device's processing load again, has more meticulous separation effect and more efficient dehydration efficiency, and is better to the treatment effect of silt, realizes better environmental benefit and social.
In addition, the sludge treatment system provided by the embodiment of the application also has the following additional technical characteristics:
in some embodiments, the trash removal device includes:
the sludge cleaning separator is used for washing and diluting the sludge and removing large impurities in the sludge to obtain first slurry;
an inlet of the sundry sorting machine is connected with an outlet of the sludge cleaning separator, and the sundry sorting machine is used for removing small sundries in the first slurry to obtain second slurry; and
and the inlet of the sand remover is connected with the outlet of the sundries sorting machine, and the sand remover is used for removing sand and stone particles in the second slurry to obtain the impurity-removed slurry.
In the technical scheme, the sludge cleaning separator can wash and dilute the sludge and remove large impurities in the sludge; after the slurry (first slurry) after deslagging by the sludge cleaning separator flows into the inlet of the explosive sorting machine from the outlet of the sludge cleaning separator, the small impurities in the first slurry can be removed by the impurity sorting machine; after the slurry (second slurry) subjected to impurity removal by the impurity sorting machine flows into the inlet of the sand removing machine from the outlet of the impurity sorting machine, sand and stone particles in the slurry (second slurry) can be removed by the sand removing machine, so that the subsequent precipitation can be carried out by the precipitation device. The impurity removing device with the structure can effectively remove large impurities, small impurities and sand particles in the sludge.
In some embodiments, the trash removal device further comprises a sludge feed hopper;
the outlet of the sludge feed hopper is connected with the inlet of the sludge cleaning separator.
In the scheme, solid or semi-solid sludge can be conveniently and quantitatively conveyed to the sludge cleaning separator through the sludge feeding hopper.
In some embodiments, the sludge treatment system further comprises a buffer tank;
the outlet of the buffer pool is connected with the inlet of the sedimentation device, and the buffer pool is used for buffering the impurity-removing slurry.
In the above scheme, the buffer pool can buffer impurity-removing slurry obtained by impurity removal of the impurity-removing device.
In some embodiments, the outlet of the buffer pool is connected with the inlet of the sedimentation device through a first pipeline, and the first pipeline is used for discharging the impurity-removing slurry in the buffer pool into the sedimentation device;
the first pipeline is provided with a first conditioner mixer, and the first conditioner mixer is used for adding a flocculating agent into the impurity removal mud in the first pipeline.
Among the above-mentioned scheme, be equipped with first conditioner blender on the first pipeline of the export of intercommunication buffer memory pond and the entry of precipitation device, impurity removal mud is at the in-process of the export flow direction of buffer memory pond to precipitation device's entry in first pipeline, and first conditioner blender can add the flocculating agent to impurity removal mud for impurity removal mud deposits in precipitation device more easily, reduces mud moisture content.
In some embodiments, the dehydration device is connected with the cache pool through a second pipeline;
and the second pipeline is used for discharging the mud liquid separated from the impurity removing mud by the dewatering device into the buffer pool.
In the above scheme, the second pipeline can discharge the dewatering device from the mud liquid separated from the impurity removing mud to the buffer pool for treatment again, so that secondary pollution caused by direct discharge is avoided.
In some embodiments, the outlet of the settling device is connected to the inlet of the dewatering device by a third conduit for discharging the settled sludge into the dewatering device;
and a second conditioner mixer is arranged on the third pipeline and used for adding a flocculating agent into the precipitation mud in the third pipeline.
In the above scheme, a second conditioner mixer is arranged on a third pipeline communicating the outlet of the precipitation device and the inlet of the dewatering device, and the second conditioner mixer can add a flocculating agent into the precipitated slurry to reduce the water content of the final sludge in the process that the precipitated slurry flows from the outlet of the precipitation device to the inlet of the dewatering device in the third pipeline.
In some embodiments, the dewatering device comprises a first dewatering mechanism, a mixing device, and a second dewatering mechanism;
the first dehydration mechanism is used for primarily dehydrating the precipitation slurry to obtain primarily dehydrated slurry;
the mixing device is arranged between the first dewatering mechanism and the second dewatering mechanism and is used for adding a modifier into the primary dewatered slurry;
the second dehydration mechanism is used for performing secondary dehydration on the primary dehydrated slurry added with the modifier.
Among the above-mentioned scheme, first dewatering mechanism can carry out primary dehydration to deposiing mud, and second dewatering mechanism can carry out secondary dehydration to deposiing mud, has fine dewatering ability. Before secondary dehydration is carried out on the precipitated slurry, the modifier is added through the mixing device, so that the specific resistance of the sludge can be effectively reduced, and the second dehydration mechanism can dehydrate the primarily dehydrated slurry more easily. In addition, since the addition of the modifier is performed after the first dewatering mechanism has primarily dewatered the precipitation sludge, the amount of the modifier to be added can be reduced in the subsequent steps.
In some embodiments, the second dewatering mechanism comprises a frame, a first filter cloth, a second filter cloth, a first drive mechanism, a second drive mechanism, and a squeezing mechanism;
the first driving mechanism and the second driving mechanism are respectively used for driving the first filter cloth and the second filter cloth to circularly move relative to the frame;
the squeezing mechanism comprises a plurality of squeezing rollers which are rotatably arranged on the rack, and the first filter cloth and the second filter cloth are sequentially wound on the squeezing rollers; the part of the first filter cloth wound on the plurality of squeezing rollers and the part of the second filter cloth wound on the plurality of squeezing rollers are used for cooperatively squeezing the primary dehydrated slurry;
wherein a diameter of a pressing roller of the plurality of pressing rollers is gradually reduced along a conveying direction of the first and second filter cloths.
In the scheme, after the first driving mechanism and the second driving mechanism drive the first filter cloth and the second filter cloth to move respectively, the parts of the first filter cloth wound on the plurality of squeezing rollers and the parts of the second filter cloth wound on the plurality of squeezing rollers are stacked together, and when the primary dehydrated slurry reaches the positions of the squeezing rollers, the squeezing rollers enable the first filter cloth and the second filter cloth to jointly squeeze the primary dehydrated slurry, so that deep filtration and dehydration are realized.
In a second aspect, an embodiment of the present application further provides a sludge treatment method, including:
diluting the sludge and removing impurities and gravels in the sludge to obtain impurity-removed slurry;
precipitating the impurity-removed slurry to obtain precipitated slurry;
and carrying out concentration deep dehydration treatment on the precipitation slurry.
In the scheme, the sludge is treated by adopting the steps of impurity removal, precipitation and deep dehydration, so that the sludge is effectively classified, the treatment load of the dehydration step is reduced, a more precise separation effect and more efficient dehydration efficiency are achieved, the sludge treatment effect is better, and better environmental benefits and social benefits are realized.
In some embodiments, the diluting the sludge and removing impurities and sand from the sludge includes:
washing and diluting the sludge, and removing large impurities in the sludge to obtain first slurry;
removing small impurities in the first slurry to obtain second slurry;
removing the sand and stone particles in the second slurry to obtain impurity-removed slurry.
In the above scheme, large impurities, small impurities and sand particles in the sludge are removed, classification of the sludge is realized, and subsequent sedimentation and dehydration are facilitated.
In some embodiments, prior to the precipitating the reject slurry, the method further comprises:
caching the impurity-removing slurry through a caching pool;
adding a flocculating agent to the de-sludged slurry.
In the scheme, the flocculating agent is added into the impurity-removed slurry, so that the impurity-removed slurry is easier to precipitate in the precipitation device, and the water content of the slurry is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural view of a sludge treatment system provided in some embodiments of the present application;
FIG. 2 is a schematic view of the dewatering apparatus shown in FIG. 1;
FIG. 3 is a flow chart of a method of sludge treatment provided by some embodiments of the present application;
fig. 4 is a flow chart of step S100 of a sludge treatment method provided in some embodiments of the present application;
fig. 5 is a flow chart of a sludge treatment method according to still other embodiments of the present application.
Icon: 100-a sludge treatment system; 10-an impurity removal device; 11-sludge cleaning separator; 12-a sundry sorting machine; 13-a sand remover; 14-a sludge feed hopper; 20-a precipitation device; 30-a dewatering device; 31-a first dewatering mechanism; 311-frame body; 312-a filter cloth; 313-a drive; 314-cache box; 315-a delivery roll; 32-a mixing device; 321-a mixing tank; 322-a dosing device; 323-a stirring mechanism; 33-a second dewatering mechanism; 331-a frame; 332-a first filter cloth; 333-a second filter cloth; 334-a first drive mechanism; 335 — a second drive mechanism; 336-a pressing mechanism; 337-squeeze rolls; 40-a cache pool; 50-a first conduit; 51-a first conditioner mixer; 60-a second conduit; 70-a third conduit; 71-a second conditioner mixer; a-large sundries; b-small sundries; c-sand and stone particles; d-mud cake.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Examples
As shown in fig. 1, an embodiment of the present application provides a sludge treatment system 100, which includes a trash removal device 10, a precipitation device 20, and a dewatering device 30.
The impurity removal device 10 is used for diluting the sludge and removing impurities and sand in the sludge to obtain impurity removal slurry; the precipitation device 20 is used for precipitating the impurity-removed slurry to obtain precipitated slurry; the dewatering device 30 is used for carrying out concentration deep dewatering treatment on the sediment slurry.
In the sludge treatment system 100, the impurity removing device 10 can dilute the sludge and remove impurities and gravels in the sludge; the precipitation device 20 can precipitate impurity-removed slurry obtained after the treatment of the impurity-removing device 10, so that the water content of the slurry is reduced; the dewatering device 30 can perform concentration deep dewatering treatment on the precipitated slurry obtained after precipitation by the precipitation device 20, so that deep dewatering is realized, and the water content of the slurry is further reduced. This kind of silt processing system 100 can carry out edulcoration, sediment, degree of depth dehydration to silt earlier, both effectively carries out classification to silt, reduces dewatering device 30's processing load again, has more meticulous separation effect and more efficient dehydration efficiency, and is better to the treatment effect of silt, realizes better environmental benefit and social.
With continued reference to FIG. 1, in some embodiments, the trash removal device 10 includes a sludge cleaning separator 11, a trash sorter 12, and a desander 13.
The sludge cleaning separator 11 is used for washing and diluting the sludge and removing large impurities A in the sludge to obtain first slurry. An inlet of the sundries sorting machine 12 is connected with an outlet of the sludge cleaning separator 11, and the sundries sorting machine 12 is used for removing small sundries B in the first slurry to obtain a second slurry. The inlet of the sand remover 13 is connected with the outlet of the sundries sorting machine 12, and the sand remover 13 is used for removing sand and stone particles C in the second slurry to obtain impurity-removed slurry.
The sludge cleaning separator 11 can wash and dilute the sludge and remove large impurities A in the sludge; after the sludge (first sludge) from which the sludge is removed by the sludge cleaning separator 11 flows into the inlet of the fry sorting machine from the outlet of the sludge cleaning separator 11, the small-sized impurities B in the first sludge can be removed by the impurity sorting machine 12; after the slurry (second slurry) from which impurities are removed by the impurity sorting machine 12 flows into the inlet of the sand remover 13 from the outlet of the impurity sorting machine 12, sand particles C in the slurry (second slurry) can be removed by the sand remover 13 so as to be deposited by the depositing device 20 later. The impurity removing device 10 with the structure can effectively remove large impurities A, small impurities B and sand particles C in the sludge.
Wherein, the inlet of the sundries sorting machine 12 is connected with the outlet of the sludge cleaning separator 11 through a pipeline; the inlet of the sand remover 13 is connected with the outlet of the sundries sorting machine 12 through a pipeline.
It should be noted that the large-scale sundries A can be massive gravels, garbage and the like, and the diameter of the large-scale sundries A is larger than 10 mm; the small impurities B can be small sand stones, garbage and the like, and the diameter of the small impurities B is 3-10 mm; the diameter of the sand granule C is 0.2-3 mm.
The sludge cleaning separator 11 is a sludge separator having a function of washing and diluting sludge, and can separate large impurities a from the sludge, and the separated large impurities a can be transported for disposal. The specific structure of the sludge cleaning separator 11 can be found in the related art, and will not be described in detail.
The sundries sorting machine 12 can separate the small sundries B in the first slurry through a filter screen. The separated small sundries B can be transported and disposed. The specific structure of the sundries sorting machine 12 can be seen in the related art, and is not described in detail herein.
The sand remover 13 is a cyclone sand remover, and can precipitate, comb, wash and separate out the sand and stone particles C in the second slurry. The separated sand and stone particles C have no peculiar smell and can be directly recycled as building materials. The specific structure of the cyclone desander can be found in the related art, and is not described in detail herein.
In some embodiments, the trash removal device 10 further comprises a sludge feed hopper 14, and an outlet of the sludge feed hopper 14 is connected to an inlet of the sludge cleaning separator 11. The solid or semi-solid sludge can be conveniently dosed into the sludge cleaning separator 11 by means of the sludge feed hopper 14.
With continued reference to fig. 1, in some embodiments, the sludge treatment system 100 further includes a buffer tank 40, an outlet of the buffer tank 40 being connected to an inlet of the settling device 20, the buffer tank 40 being configured to buffer the impure slurry.
The buffer tank 40 can be arranged below the outlet of the desander 13, and the buffer tank 40 can transfer and store the impurity-removed slurry flowing out of the outlet of the desander 13. The reject slurry in the buffer tank 40 can then be pumped into the settling device 20.
In some embodiments, the outlet of the buffer tank 40 is connected to the inlet of the settling device 20 via a first conduit 50, the first conduit 50 being adapted to discharge the reject slurry from the buffer tank 40 into the settling device 20.
The first pipe 50 is provided with a first conditioner mixer 51, and the first conditioner mixer 51 adds a flocculant to the trash slurry in the first pipe 50.
Be equipped with first conditioner blender 51 on the first pipeline 50 of the export of intercommunication buffer pool 40 and the entry of precipitation device 20, the in-process of edulcoration mud from the export flow direction of buffer pool 40 to the entry of precipitation device 20 in first pipeline 50, first conditioner blender 51 can add the flocculating agent to the edulcoration mud for the edulcoration mud deposits more easily in precipitation device 20, reduces the mud moisture content, improves back level sludge dewatering efficiency.
The flocculant added to the trash slurry by the first conditioner mixer 51 may be polyacrylamide.
Illustratively, the precipitation device 20 is a concentrating tower. The impurity-removing slurry in the buffer tank 40 enters a concentration tower through a first pipeline 50, the impurity-removing slurry added with a flocculating agent is precipitated in the concentration tower, the impurity-removing slurry is subjected to tempering concentration, primary solid-liquid separation is carried out, the water content of the sludge is reduced, and the slurry is concentrated to the water content of 88-95%. After the impurity-removed slurry is precipitated in the concentration tower, the supernatant can reach the discharge standard, and of course, the supernatant can also be used as washing water for washing the diluted sludge by the sludge washing separator 11.
In some embodiments, the mud cake D and the mud solution can be obtained after the sedimentation mud is subjected to a concentration deep dewatering treatment by the dewatering device 30. The mud cake D can be used for garden recovery, landfill and the like.
Optionally, the dewatering device 30 is connected to the buffer tank 40 via a second conduit 60, the second conduit 60 being adapted to discharge the slurry separated from the reject slurry by the dewatering device 30 into the buffer tank 40.
The mud liquid separated from the precipitated mud by the dewatering device 30 generally does not meet the discharge requirement, so the mud liquid is discharged into the buffer tank 40 through the second pipeline 60, the mud liquid entering the buffer tank 40 and the impurity-removing mud enter the precipitation device 20 together for precipitation, and the supernatant can meet the discharge requirement, thereby avoiding secondary pollution caused by directly discharging the mud liquid separated from the precipitated mud by the dewatering device 30.
In some embodiments, the outlet of the settling device 20 is connected to the inlet of the dewatering device 30 by a third conduit 70, the third conduit 70 being used to discharge the settled sludge into the dewatering device 30. A second conditioner mixer 71 is provided on the third conduit 70, the second conditioner mixer 71 being adapted to add a flocculating agent to the settled sludge in the third conduit 70.
The second conditioner mixer 71 may add a flocculant to the settled sludge to reduce the water content of the final sludge as the settled sludge flows from the outlet of the settling device 20 to the inlet of the dewatering device 30 in the third conduit 70.
Wherein the flocculant added by the second conditioner mixer 71 to the precipitation sludge in the third conduit 70 may be polyacrylamide.
In some embodiments, as shown in fig. 2, the dewatering device includes a first dewatering mechanism 31, a mixing device 32, and a second dewatering mechanism 33. The first dewatering mechanism 31 is used for primary dewatering of the settled sludge to obtain primary dewatered sludge. The mixing device 32 is provided between the first dewatering mechanism 31 and the second dewatering mechanism 33, and the mixing device 32 is used for adding a modifier to the primarily dewatered slurry. The second dewatering mechanism 33 is used for secondary dewatering of the primary dewatered sludge to which the modifier is added.
The first dewatering mechanism 31 can dewater the precipitated slurry for the first time, and the second dewatering mechanism 33 can dewater the precipitated slurry for the second time, so that the dewatering capacity is good. Before the secondary dehydration is carried out on the precipitated slurry, the modifier is added through the mixing device 32, so that the specific resistance of the sludge can be effectively reduced, and the secondary dehydration mechanism 33 can more easily dehydrate the primary dehydrated slurry. Further, since the addition of the modifier is performed after the first dewatering mechanism 31 dewaters the precipitation sludge for the first time, the amount of the modifier to be added can be reduced in the subsequent steps.
Alternatively, the first dewatering mechanism 31 includes a frame body 311, a filter cloth 312, a driving device 313, a buffer tank 314, and a plurality of feed rollers 315. The feeding rollers 315 are rotatably disposed on the frame body 311, the filter cloth 312 is wound on the feeding rollers 315, and the filter cloth 312 is a closed ring structure connected end to end. The driving device 313 is used for driving a feeding roller 315 to rotate so as to realize the movement of the filter cloth 312. The buffer tank 314 is fixed to the frame body 311, and the inlet of the first dehydrating mechanism 31 is provided to the buffer tank 314, that is, the third pipe 70 is connected to the buffer tank 314.
After entering the buffer tank 314 from the third pipeline 70, the precipitated slurry flows out of the buffer tank 314 and is uniformly distributed on the moving filter cloth 312, along with the movement of the filter cloth 312, free water is subjected to gravity dehydration through the tiny mesh holes of the filter cloth, so that the gravity dehydration function is achieved, and the water content of the concentrated sludge is reduced to about 83%.
After the precipitated slurry is primarily dehydrated by the first dehydration mechanism 31, primarily dehydrated slurry is obtained, and the slurry separated from the precipitated slurry can be discharged into the buffer tank 40 through the second pipeline 60.
Optionally, the mixing device 32 includes a mixing tank 321, a dosing device 322 and a stirring mechanism 323, wherein the mixing tank 321 is mounted on the frame body 311 and is used for containing the primary dehydrated slurry obtained through the dehydration treatment by the first dehydration mechanism 31; the chemical feeding device 322 is installed on the mixing tank 321, and the chemical feeding device 322 is used for adding a modifier into the primary dehydrated slurry in the mixing tank 321; the stirring mechanism 323 is used to sufficiently mix the modifier with the primary dewatered sludge and finally convey the primary dewatered sludge to which the modifier is added to the second dewatering mechanism 33.
Wherein, the drug adding device 322 can be a manual drug adding device 322, such as a syringe, or an automatic drug adding device 322.
Illustratively, the stirring mechanism 323 includes a stirring shaft extending into the mixing tank 321, a helical blade disposed in the mixing tank 321 on the stirring shaft, and a driving motor connected to the stirring shaft and driving the stirring shaft to rotate.
Illustratively, the modifying agent may be an iron aluminum salt complexing agent.
Alternatively, the second dewatering mechanism 33 includes a frame 331, a first filter cloth 332, a second filter cloth 333, a first driving mechanism 334, a second driving mechanism 335, and a pressing mechanism 336. The first driving mechanism 334 and the second driving mechanism 335 are used for driving the first filter cloth 332 and the second filter cloth 333 to circularly move relative to the frame 331 respectively. The squeezing mechanism 336 comprises a plurality of squeezing rollers 337 rotatably arranged on the frame 331, and the first filter cloth 332 and the second filter cloth 333 are sequentially wound around the plurality of squeezing rollers 337; the portion of the first filter cloth 332 wound around the plurality of pressing rollers 337 and the portion of the second filter cloth 333 wound around the plurality of pressing rollers 337 are used to press the primarily dewatered sludge in cooperation. Wherein the diameter of the pressing rollers 337 in the pressing mechanism 336 is gradually reduced along the conveying direction of the first and second filter cloths 332 and 333.
After the first and second filter cloths 332, 333 are driven by the first and second driving mechanisms 334, 335 respectively to move, the parts of the first filter cloth 332 wound around the plurality of squeezing rollers 337 and the parts of the second filter cloth 333 wound around the plurality of squeezing rollers 337 are stacked together, and when the primary dehydrated slurry reaches the position of the squeezing rollers 337, the squeezing rollers 337 enable the first filter cloth 332 and the second filter cloth 333 to jointly squeeze the primary dehydrated slurry, thereby realizing deep filtration and dehydration. The diameter of the squeezing rollers 337 is gradually reduced along the conveying direction of the first filter cloth 332 and the second filter cloth 333, that is, the primary dehydrated slurry between the first filter cloth 332 and the second filter cloth 333 passes through the squeezing rollers 337 with a larger diameter and then passes through the squeezing rollers 337 with a smaller diameter, so that the squeezing force applied to the primary dehydrated slurry between the first filter cloth 332 and the second filter cloth 333 is gradually increased, and the primary dehydrated slurry is gradually squeezed into mud cakes, thereby having a good dehydration effect.
The frame 331 of the second dewatering mechanism 33 is fixedly connected with the frame body 311 of the first dewatering mechanism 31, and the first filter cloth 332 and the second filter cloth 333 in the second dewatering mechanism 33 are both closed ring structures connected end to end.
The first driving mechanism 334 may be a motor that drives a roller for moving the first filter cloth 332 to rotate; the second driving mechanism 335 may also be a motor that drives a roller for moving the second filter cloth 333 to rotate.
When the first filter cloth 332 and the second filter cloth 333 run, the modified primary dewatering slurry flowing out of the mixing device 32 falls onto the second filter cloth 333, the primary dewatering slurry is firstly subjected to gravity dewatering on the second filter cloth 333, the primary dewatering slurry is extruded between the first filter cloth 332 and the second filter cloth 333 along with the running of the first filter cloth 332 and the second filter cloth 333, the first filter cloth 332 and the second filter cloth 333 are matched to perform deep filtration dewatering on the primary dewatering slurry under the action of the extrusion force of each extrusion roller 337, and finally the water content of sludge can be reduced to be below 60%.
It should be noted that the slurry separated from the second dewatering mechanism 33 can be discharged into the buffer tank 40 through the second pipe 60.
In addition, as shown in fig. 3, an embodiment of the present application further provides a method for rapidly processing sludge, which may be based on the sludge processing system provided in the foregoing embodiment, and the method includes:
s100: diluting the sludge and removing impurities and sand in the sludge to obtain impurity-removed slurry.
The impurity removing device 10 of the sludge treatment system can be used for diluting the sludge and removing impurities and sand in the sludge.
S200: and precipitating the impurity-removed slurry to obtain precipitated slurry.
The de-sludging sludge may be precipitated by means of a precipitation device 20 of the sludge treatment system.
S300: and (4) carrying out concentration deep dehydration treatment on the precipitation slurry.
The settled sludge may be subjected to a thickening and deep dewatering process using the dewatering device 30 of the sludge treatment system.
In the method, the sludge is treated by adopting the steps of impurity removal, precipitation and deep dehydration, so that the sludge is effectively classified and treated, the treatment load of the dehydration step is reduced, the method has a finer separation effect and higher dehydration efficiency, the sludge treatment effect is better, and better environmental benefit and social benefit are realized.
In some embodiments of the present application, as shown in fig. 4, step S100 includes:
s110: washing and diluting the sludge, and removing large impurities A in the sludge to obtain first slurry.
The sludge can be washed and diluted by the sludge cleaning and separating machine 11 of the impurity removing device 10, and large impurities A in the sludge can be removed.
S120: and removing small impurities B in the first slurry to obtain a second slurry.
The small impurities B in the first slurry may be removed by means of the impurity sorter 12 of the impurity removal device 10.
S130: removing the sand particles C from the second slurry to obtain a decontaminated slurry.
The sand particles C in the second slurry can be removed by means of the sand remover 13 of the de-burring apparatus 10.
As shown in fig. 5, in some embodiments, prior to step 200, the sludge treatment method further comprises:
s140: the trash slurry is buffered by a buffer pool 40.
And discharging the impurity-removed slurry flowing out of the outlet of the sand remover 13 into a buffer pool 40 for transfer storage.
S150: adding a flocculating agent to the de-sludged slurry.
A first conditioner mixer 51 in the sludge treatment system may be used to add a flocculant to the reject slurry during its passage from the first conduit 50 to the settling device 20.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A sludge treatment system, comprising:
the impurity removal device is used for diluting the sludge and removing impurities and gravels in the sludge to obtain impurity removal slurry;
the precipitation device is used for precipitating the impurity-removed slurry to obtain precipitated slurry; and
and the dewatering device is used for carrying out concentration deep dewatering treatment on the precipitated slurry.
2. The sludge treatment system of claim 1 wherein the contaminant removal device comprises:
the sludge cleaning separator is used for washing and diluting the sludge and removing large impurities in the sludge to obtain first slurry;
an inlet of the sundry sorting machine is connected with an outlet of the sludge cleaning separator, and the sundry sorting machine is used for removing small sundries in the first slurry to obtain second slurry; and
and the inlet of the sand remover is connected with the outlet of the sundries sorting machine, and the sand remover is used for removing sand and stone particles in the second slurry to obtain the impurity-removed slurry.
3. The sludge treatment system of claim 2 wherein the trash removal device further comprises a sludge feed hopper;
the outlet of the sludge feed hopper is connected with the inlet of the sludge cleaning separator.
4. The sludge treatment system of any one of claims 1 to 3 wherein the sludge treatment system further comprises a buffer tank;
the outlet of the buffer pool is connected with the inlet of the sedimentation device, and the buffer pool is used for buffering the impurity-removing slurry.
5. The sludge treatment system of claim 4 wherein the outlet of the buffer tank is connected to the inlet of the settling device by a first conduit for discharging the decontaminated sludge in the buffer tank into the settling device;
the first pipeline is provided with a first conditioner mixer, and the first conditioner mixer is used for adding a flocculating agent into the impurity removal mud in the first pipeline.
6. The sludge treatment system of claim 5 wherein the dewatering apparatus is connected to the buffer tank by a second conduit;
and the second pipeline is used for discharging the mud liquid separated from the impurity removing mud by the dewatering device into the buffer pool.
7. The sludge treatment system of claim 1 wherein the outlet of the settling device is connected to the inlet of the dewatering device by a third conduit for discharging the settled sludge into the dewatering device;
and a second conditioner mixer is arranged on the third pipeline and used for adding a flocculating agent into the precipitation mud in the third pipeline.
8. The sludge treatment system of claim 1 wherein the dewatering device comprises a first dewatering mechanism, a mixing device, and a second dewatering mechanism;
the first dehydration mechanism is used for primarily dehydrating the precipitation slurry to obtain primarily dehydrated slurry;
the mixing device is arranged between the first dewatering mechanism and the second dewatering mechanism and is used for adding a modifier into the primary dewatered slurry;
the second dehydration mechanism is used for performing secondary dehydration on the primary dehydrated slurry added with the modifier.
9. The sludge treatment system of claim 8 wherein the second dewatering mechanism comprises a frame, a first filter cloth, a second filter cloth, a first drive mechanism, a second drive mechanism, and a pressing mechanism;
the first driving mechanism and the second driving mechanism are respectively used for driving the first filter cloth and the second filter cloth to circularly move relative to the frame;
the squeezing mechanism comprises a plurality of squeezing rollers which are rotatably arranged on the rack, and the first filter cloth and the second filter cloth are sequentially wound on the squeezing rollers; the part of the first filter cloth wound on the plurality of squeezing rollers and the part of the second filter cloth wound on the plurality of squeezing rollers are used for cooperatively squeezing the primary dehydrated slurry;
wherein a diameter of a pressing roller of the plurality of pressing rollers is gradually reduced along a conveying direction of the first and second filter cloths.
10. A method of treating sludge, the method comprising:
diluting the sludge and removing impurities and gravels in the sludge to obtain impurity-removed slurry;
precipitating the impurity-removed slurry to obtain precipitated slurry;
and carrying out concentration deep dehydration treatment on the precipitation slurry.
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