CN116969654A - Sludge concentration process and system - Google Patents
Sludge concentration process and system Download PDFInfo
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- CN116969654A CN116969654A CN202310908671.7A CN202310908671A CN116969654A CN 116969654 A CN116969654 A CN 116969654A CN 202310908671 A CN202310908671 A CN 202310908671A CN 116969654 A CN116969654 A CN 116969654A
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- 239000010802 sludge Substances 0.000 title claims abstract description 239
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 153
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000000967 suction filtration Methods 0.000 claims abstract description 115
- 239000004744 fabric Substances 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 10
- 238000007906 compression Methods 0.000 claims abstract description 10
- 239000008394 flocculating agent Substances 0.000 claims description 35
- 238000010008 shearing Methods 0.000 claims description 25
- 230000008719 thickening Effects 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000009471 action Effects 0.000 description 19
- 230000000694 effects Effects 0.000 description 10
- 208000005156 Dehydration Diseases 0.000 description 9
- 230000018044 dehydration Effects 0.000 description 9
- 238000006297 dehydration reaction Methods 0.000 description 9
- 238000001125 extrusion Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 7
- 230000002441 reversible effect Effects 0.000 description 7
- 238000012937 correction Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The application provides a sludge concentration process and a system. The sludge concentration system comprises a sludge-water separation device and a sludge compression device. The two-section spiral suction filter comprises a mixing shell, a screw rod, filter cloth, a suction filtration shell, a suction filtration pipe and a suction filtration box, wherein a water leakage hole is formed in the inner wall of the mixing shell, one end of the mixing shell is communicated with the outlet of the one-section spiral mixer, the screw rod is arranged in the mixing shell, the two ends of the screw rod are respectively connected with the mixing shell in a rotating mode, the filter cloth is attached to the inner wall of the mixing shell, the filter cloth is at least shielded at the water leakage hole, the suction filtration shell is sleeved on the mixing shell, the water leakage hole is communicated with the suction filtration shell, the suction filtration shell is communicated with the suction filtration pipe, and the suction filtration shell is communicated with the suction filtration box through the suction filtration pipe. The inlet of the sludge compression device is communicated with the other end part of the mixing shell. The sludge concentration system can achieve the structural simplification and control program simplification of the sludge concentration equipment under the condition of ensuring the concentration stability and efficiency of the sludge.
Description
Technical Field
The application relates to the technical field of sludge treatment, in particular to a sludge treatment device.
Background
The water content of the sludge generated in the wastewater treatment process is very high, so that the volume of the sludge is relatively large, the treatment, the utilization and the transportation of the sludge are difficult, and the sludge concentration is to reduce the water content of the sludge and the volume of the sludge through the sludge thickening, thereby reducing the subsequent treatment cost.
The method for concentrating sludge is a gravity concentration method, which is a sedimentation process in nature, and belongs to the Chinese patent application with the patent application number of 201611109390.1, for example, discloses a split concentration belt filter press and a sludge dewatering process, which utilize a feeding dewatering device and an extrusion dewatering device to compress and sediment so as to realize the compression of sludge, in particular, the sludge and a flocculating agent are rapidly and fully mixed under the action of spiral stirring, so that the flocculating agent can play the maximum effect, more free water is separated, then the flocculated sludge falls into a gravity dewatering net belt 13, forms of climbing can be formed in the advancing process of the net belt, the gravity separation effect of the free water and the sludge is aggravated, and then the sludge can remove most of free water under the action of gravity, the winding force of the mesh belt is increased slightly, the sludge between the upper mesh belt and the lower mesh belt is subjected to the extrusion force and the shearing force to further concentrate the sludge, but the sludge is mainly concentrated on the mesh belt in a belt type mode, the mesh belt is easy to deviate in transmission, the stability of the equipment for concentrating the sludge is affected, as indicated, the mesh belt tightening device is arranged at the direction conversion position of the lower mesh belt and the upper mesh belt respectively, the mesh belt deviation correcting devices are also arranged on the lower mesh belt and the upper mesh belt respectively, so that the structural complexity of the sludge concentrating equipment and the complexity of a control program are greatly increased, the absolute running stability of the upper mesh belt and the lower mesh belt in the transmission process can not be ensured even if the mesh belt tightening device and the mesh belt deviation correcting devices are increased, and the shutdown replacement of the upper mesh belt and the lower mesh belt is even caused, this reduces the efficiency of sludge concentration.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provide a sludge concentration process and a system which can realize the structural simplification of sludge concentration equipment and the simplification of control procedures under the condition of ensuring the concentration stability and efficiency of sludge.
The aim of the application is realized by the following technical scheme:
a sludge thickening system comprising:
the mud-water separation device comprises a first-stage spiral mixer and a second-stage spiral filter, wherein the inlet of the first-stage spiral mixer is used for inputting sludge and flocculant;
the two-section spiral suction filter comprises a mixing shell, a screw rod, filter cloth, a suction filtration shell, a suction filtration pipe and a suction filtration box, wherein a water leakage hole is formed in the inner wall of the mixing shell, one end of the mixing shell is communicated with an outlet of the one-section spiral mixer, the screw rod is arranged in the mixing shell, the two ends of the screw rod are respectively and rotatably connected with the mixing shell, the filter cloth is attached to the inner wall of the mixing shell, the filter cloth is at least shielded at the water leakage hole, the suction filtration shell is sleeved on the mixing shell, the water leakage hole is communicated with the suction filtration shell, the suction filtration shell is communicated with the suction filtration pipe, and the suction filtration shell is communicated with the suction filtration box through the suction filtration pipe;
and the inlet of the sludge compression device is communicated with the other end part of the mixing shell.
In one embodiment, the suction filtration tank comprises a water storage tank and a suction filtration machine, the water storage tank is communicated with the suction filtration shell through the suction filtration pipe, and the suction filtration end of the suction filtration machine is communicated with the water storage tank.
In one embodiment, one end of the suction filtration pipe is positioned at the bottom of the water storage tank, and the suction filtration end of the suction filtration machine is positioned at the top of the water storage tank.
In one embodiment, the storage tank is for storing up to 80% water.
In one embodiment, the water storage tank is provided with a water outlet, and the water outlet is positioned at the bottom of the water storage tank.
In one embodiment, the screw rod comprises a rotating roller, screw blades and a soft scraping plate, wherein the rotating roller is arranged in the mixing shell, two ends of the rotating roller are respectively connected with the mixing shell in a rotating mode, the screw blades are sleeved on the rotating roller, the soft scraping plate is arranged on the periphery of one side, away from the rotating roller, of the screw blades, and the soft scraping plate is in butt joint with the filter cloth.
In one embodiment, the two-stage spiral suction filter further comprises a motor, and one end of the rotating roller at least partially protrudes out of the mixing shell and is connected with a power output end of the motor.
In one embodiment, the sludge concentration system further comprises a sludge pump, the outlet of the one-stage helical mixer being in communication with an end of the mixing housing via the sludge pump.
In one embodiment, the one-stage spiral mixer comprises a mixing screw, a mixing tank and a mixing motor, wherein the mixing screw is arranged in the mixing tank, one end of the mixing screw at least partially protrudes out of the mixing tank and is connected with a power output end of the mixing motor, two ends of the mixing screw are respectively and rotatably connected with the mixing screw, an inlet and an outlet are formed in the mixing tank, and the inlet and the outlet are respectively positioned at two ends of the mixing tank.
A sludge concentration process comprising the steps of:
obtaining sludge and a flocculating agent;
mixing the sludge and the flocculant together to obtain primary sludge;
performing spiral dispersion suction filtration operation on the primary sludge so as to remove free water by suction filtration in shearing mixing of the primary sludge, thereby obtaining secondary sludge;
and performing plate and frame filter pressing operation on the secondary sludge to obtain concentrated sludge.
In one embodiment, the spiral dispersion suction filtration operation is performed on the primary sludge, specifically: and carrying out spiral conveying on the primary sludge so as to enable the primary sludge to be sheared and mixed, and synchronously carrying out suction filtration on the primary sludge so as to enable the primary sludge to be subjected to suction filtration in the shearing and mixing process to remove free water.
Compared with the prior art, the application has at least the following advantages:
the sludge concentration system provided by the application has the advantages that the inlet of the first-stage spiral mixer is used for inputting the sludge and the flocculating agent, so that the sludge and the flocculating agent are quickly and fully mixed in a spiral mixing mode, the full utilization of the flocculating agent is effectively ensured, more separation of free water in the sludge is realized, the utilization rate of the flocculating agent is further realized, the use of the flocculating agent is reduced, and the dehydration rate of the sludge is better ensured; in addition, make the export intercommunication of mixing housing's one end and one section spiral blender, the filter cloth shelters from in the hole department that leaks at least, the suction casing cup joints on mixing housing, and the hole that leaks communicates with the suction casing, the suction casing passes through suction pipe and suction box intercommunication, even make the mud that the dehydration of flocculating agent was handled get into mixing housing in, and be provided with the hob that rotates the connection in the mixing housing, make the mud in the mixing housing release inside free water more easily under the shearing force effect, and then cooperate filter cloth, suction casing and suction box, make the free water that mud release under the shearing force effect be filtered to the suction box under the effect of suction box through the suction casing fully fast, concentration stability and efficiency of mud have been ensured, and the setting up of rectifying control equipment of the transmission course of filter cloth in the belt filter press has been avoided, the simplification of mud concentration equipment and control program's simplification has been realized promptly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a sludge concentration system according to an embodiment of the present application;
FIG. 2 is a partial view of the sludge thickening system of FIG. 1;
FIG. 3 is a cross-sectional view of the sludge thickening system shown in FIG. 2;
FIG. 4 is another cross-sectional view of the sludge thickening system shown in FIG. 2;
FIG. 5 is an enlarged view of a portion of the sludge thickening system of FIG. 4 at A;
FIG. 6 is a partial view of the sludge thickening system of FIG. 2;
FIG. 7 is a partial enlarged view of the sludge thickening system of FIG. 6 at B;
FIG. 8 is another partial view of the sludge thickening system of FIG. 1;
FIG. 9 is a cross-sectional view of the sludge thickening system of FIG. 8;
fig. 10 is a flowchart of a sludge concentration process according to an embodiment of the present application.
Detailed Description
In order that the application may be readily understood, a more complete description of the application will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the application. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
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 application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The application provides a sludge concentration system. The sludge concentration system comprises a sludge-water separation device and a sludge compression device. The mud-water separation device comprises a first-stage spiral mixer and a second-stage spiral filter, wherein an inlet of the first-stage spiral mixer is used for feeding sludge and flocculant. The two-section spiral suction filter comprises a mixing shell, a screw rod, filter cloth, a suction filtration shell, a suction filtration pipe and a suction filtration box, wherein a water leakage hole is formed in the inner wall of the mixing shell, one end of the mixing shell is communicated with the outlet of the one-section spiral mixer, the screw rod is arranged in the mixing shell, the two ends of the screw rod are respectively connected with the mixing shell in a rotating mode, the filter cloth is attached to the inner wall of the mixing shell, the filter cloth is at least shielded at the water leakage hole, the suction filtration shell is sleeved on the mixing shell, the water leakage hole is communicated with the suction filtration shell, the suction filtration shell is communicated with the suction filtration pipe, and the suction filtration shell is communicated with the suction filtration box through the suction filtration pipe. The inlet of the sludge compression device is communicated with the other end part of the mixing shell.
The sludge concentration system ensures that the inlet of the first-stage spiral mixer is used for inputting the sludge and the flocculating agent so as to realize rapid and full mixing of the sludge and the flocculating agent in a spiral mixing mode, thereby effectively ensuring full utilization of the flocculating agent, realizing more separation of free water in the sludge, further realizing the utilization rate of the flocculating agent, reducing the use of the flocculating agent and better ensuring the dehydration rate of the sludge; in addition, make the export intercommunication of mixing housing's one end and one section spiral blender, the filter cloth shelters from in the hole department that leaks at least, the suction casing cup joints on mixing housing, and the hole that leaks communicates with the suction casing, the suction casing passes through suction pipe and suction box intercommunication, even make the mud that the dehydration of flocculating agent was handled get into mixing housing in, and be provided with the hob that rotates the connection in the mixing housing, make the mud in the mixing housing release inside free water more easily under the shearing force effect, and then cooperate filter cloth, suction casing and suction box, make the free water that mud release under the shearing force effect be filtered to the suction box under the effect of suction box through the suction casing fully fast, concentration stability and efficiency of mud have been ensured, and the setting up of rectifying control equipment of the transmission course of filter cloth in the belt filter press has been avoided, the simplification of mud concentration equipment and control program's simplification has been realized promptly.
For a better understanding of the sludge concentration system of the present application, the sludge concentration system of the present application is further explained below:
referring to fig. 1-2 and 4-5, an embodiment of a sludge concentrating system 10 includes a sludge-water separator 100 and a sludge compressor (not shown). The mud-water separation apparatus 100 includes a primary screw mixer 110 and a secondary screw extractor 120, and an inlet 103 of the primary screw mixer 110 is used for feeding sludge and a flocculant. The two-section spiral suction filter 120 comprises a mixing shell 121, a spiral rod 122, filter cloth 123, a suction filtration shell 124, a suction filtration pipe 125 and a suction filtration box 126, wherein a water leakage hole 101 is formed in the inner wall of the mixing shell 121, one end of the mixing shell 121 is communicated with the outlet 104 of the one-section spiral mixer 110, the spiral rod 122 is arranged in the mixing shell 121, two ends of the spiral rod 122 are respectively and rotatably connected with the mixing shell 121, the filter cloth 123 is attached to the inner wall of the mixing shell 121, the filter cloth 123 is at least shielded at the water leakage hole 101, the suction filtration shell 124 is sleeved on the mixing shell 121, the water leakage hole 101 is communicated with the suction filtration shell 124, the suction filtration shell 124 is communicated with the suction filtration pipe 125, and the suction filtration shell 124 is communicated with the suction filtration box 126 through the suction filtration pipe 125. The inlet 103 of the sludge compression device communicates with the other end of the mixing housing 121.
The sludge concentration system 10 enables the inlet 103 of the first-stage spiral mixer 110 to be used for inputting the sludge and the flocculating agent so as to realize rapid and full mixing of the sludge and the flocculating agent in a spiral mixing mode, thereby effectively ensuring full utilization of the flocculating agent, realizing more separation of free water in the sludge, further realizing the utilization rate of the flocculating agent, reducing the use of the flocculating agent and better ensuring the dehydration rate of the sludge; in addition, one end of the mixing shell 121 is communicated with the outlet 104 of the one-section spiral mixer 110, the filter cloth 123 is at least shielded at the water leakage hole 101, the suction shell 124 is sleeved on the mixing shell 121, the water leakage hole 101 is communicated with the suction shell 124, the suction shell 124 is communicated with the suction box 126 through the suction tube 125, even if the sludge subjected to the dehydration treatment of the flocculating agent enters the mixing shell 121, the spiral rod 122 which is rotationally connected is arranged in the mixing shell 121, so that the sludge in the mixing shell 121 releases the free water in the interior more easily under the action of shearing force, and then the filter cloth 123, the suction shell 124 and the suction box 126 are matched, so that the free water released by the action of the shearing force of the sludge is synchronously and sufficiently and quickly suction-filtered into the suction box 126 through the suction shell 124, the concentration stability and efficiency of the sludge are ensured, and the addition of correction control equipment for the transmission process of the filter cloth 123 in the belt filter press is avoided, namely the structure simplification and the control program simplification of the sludge concentration equipment are realized.
Referring to fig. 6 to 7, in one embodiment, the number of the suction filtration tubes 125 is plural, the plural suction filtration tubes 125 are arranged on the suction filtration housing 124, and each suction filtration tube 125 is respectively communicated with the suction filtration tank 126 and the suction filtration housing 124.
Referring to fig. 6 to fig. 7, in one embodiment, the mixing housing 121 includes a hollow region 1211 and a spacing region 1212, the periphery of the hollow region 1211 is connected to the spacing region 1212, and the water leakage hole 101 is formed in the hollow region 1211.
Referring to fig. 6 to fig. 7, in one embodiment, the number of the hollow areas 1211 is plural, the plurality of hollow areas 1211 are disposed on the spacing area 1212 at intervals, and each hollow area 1211 is provided with a plurality of water leakage holes 101 disposed at intervals.
Referring to fig. 6 to fig. 7, in one embodiment, the extending direction of each water leakage hole 101 intersects with the thickness direction of the hollow region 1211. It can be understood that when the filter cloth 123 receives the attractive force consistent with the thickness direction, the sludge on the surface of the filter cloth 123 is easily separated from the filter holes of the filter cloth 123 and is pumped out together, so that the turbidity of the free water obtained by the pumping filtration is high, therefore, in order to further reduce the turbidity of the free water obtained by the pumping filtration, in this embodiment, the extending direction of each water leakage hole 101 is intersected with the thickness direction of the hollowed-out area 1211, that is, the acting direction of the attractive force generated by the pumping filtration is intersected with the thickness direction of the hollowed-out area 1211 at the water leakage hole 101, so that the attractive force received by the sludge on the surface of the filter cloth 123 is intersected with the thickness direction of the filter cloth 123, and the content of the sludge in the free water obtained by the pumping filtration is effectively reduced.
The filter cloth is attached to the spacer region by an adhesive.
Referring to fig. 2 to 4, in one embodiment, the suction filtration tank 126 includes a water storage tank 1261 and a suction filter 1262, the water storage tank 1261 is communicated with the suction filtration casing 124 through a suction filtration pipe 125, and a suction filtration end of the suction filter 1262 is communicated with the water storage tank 1261, so that effective suction filtration separation of free water in sludge is better realized.
Referring to fig. 3 to 4, in one embodiment, one end of the suction filter tube 125 is located at the bottom of the water storage tank 1261, and the suction filter end of the suction filter 1262 is located at the top of the water storage tank 1261, so that stable suction filtration and separation of free water in sludge are better ensured.
In one embodiment, the water storage tank is used for storing 80% of water at most, so that the suction filtration stability of free water in the sludge is better ensured.
Referring to fig. 2 to 3, in one embodiment, the water tank 1261 is provided with a water outlet 102, and the water outlet 102 is located at the bottom of the water tank 1261, so as to further better ensure the filtering stability of free water in the sludge.
Referring to fig. 3 to 5, in one embodiment, the screw rod 122 includes a rotating roller 1221, a screw blade 1222 and a soft scraper 1223, the rotating roller 1221 is disposed inside the mixing housing 121, two ends of the rotating roller 1221 are respectively rotatably connected with the mixing housing 121, the screw blade 1222 is sleeved on the rotating roller 1221, the soft scraper 1223 is disposed on a periphery of a side of the screw blade 1222 away from the rotating roller 1221, and the soft scraper 1223 abuts against the filter cloth 123. It can be understood that although the overall size of the sludge increases after flocculation, so as to alleviate the problem of clogging of the filter cloth 123 by the sludge, in practice, if the viscosity of the sludge is high, the sludge still adheres to the filter cloth 123 to form a water-resistant layer, so that the suction filtration of free water in the sludge is affected, and therefore, in order to better realize the stable and effective separation of free water in the sludge in the mixing housing 121, in the present application, the periphery of one side of the spiral blade 1222 away from the rotating roller 1221 is provided with a soft scraper 1223, and the soft scraper 1223 abuts against the filter cloth 123, so that the soft scraper 1223 scrapes the surface of the filter cloth 123 together in the rotating process of the spiral blade 1222, so as to effectively ensure the stable and effective separation of free water in the sludge in the mixing housing 121.
Referring to fig. 2 and 6, in one embodiment, the two-stage spiral filter 120 further includes a motor 127, and one end of a rotating roller 1221 protrudes at least partially from the mixing housing 121 and is connected to a power output end of the motor 127.
Referring to fig. 1, 4 and 5, in one embodiment, the sludge concentration system 10 further includes a sludge pump 200, and the outlet 104 of the primary screw mixer 110 is in communication with an end of the mixing housing 121 via the sludge pump 200, thereby advantageously allowing for the transfer of sludge between the primary screw mixer 110 and the mixing housing 121.
Referring to fig. 1, 8 and 9, in one embodiment, the one-stage spiral mixer 110 includes a mixing screw 111, a mixing tank 112 and a mixing motor 113, the mixing screw 111 is disposed in the mixing tank 112, one end of the mixing screw 111 at least partially protrudes from the mixing tank 112 and is connected to a power output end of the mixing motor 113, two ends of the mixing screw 111 are respectively rotatably connected to the mixing screw 111, the mixing tank 112 is provided with an inlet 103 and an outlet 104, and the inlet 103 and the outlet 104 are respectively disposed at two ends of the mixing tank 112, so that rapid and sufficient mixing of sludge and flocculant is effectively ensured.
Referring to fig. 1, 8 and 9, in one embodiment, the mixing screw 111 includes a rod 1111, a forward helical blade 1112 and a reverse helical blade 1113, the forward helical blade 1112 is sleeved on the reverse helical blade 1113, the reverse helical blade 1113 is sleeved on the rod 1111, the thread direction of the forward helical blade 1112 is opposite to the thread direction of the forward helical blade 1112, that is, when the thread direction of the forward helical blade 1112 is a forward thread, the thread direction of the reverse helical blade 1113 is a reverse thread, and when the thread direction of the forward helical blade 1112 is a reverse thread, the thread direction of the forward helical blade 1222 is a forward thread, so that the mixing efficiency and the mixing sufficiency of the sludge and the flocculant are effectively improved, the dewatering rate of the sludge and the utilization rate of the flocculant are better ensured, and the sludge concentration efficiency and the low energy consumption are better ensured. In one embodiment, the width of the forward helical blade 1112 and the width of the reverse helical blade 1113 are (1-2): (3-5). Further, the average radius of the mixing tank 112 and the width of the counter-helical blades 1113 are (8-12): (3-5), and the mixing efficiency and the mixing sufficiency of the sludge and the flocculant are further improved.
It should be noted that, the above-mentioned "one end of the rotating roller at least partially protrudes from the mixing housing and is connected with the power output end of the motor" may, in practice, also be that one end of the rotating roller at least protrudes from the mixing housing, one end of the rod body at least partially protrudes from the mixing tank, one end of the rotating roller of the protruding portion is connected with the rod body of the protruding portion, and one end of the mixing housing is communicated with one end of the mixing tank, so that energy consumption for concentrating sludge is effectively saved, and the structure of the sludge concentrating system is better simplified.
In one embodiment, the flocculant is at least one of a sludge conditioner, PAM, and PAC, preferably ensuring efficient separation of free water of the sludge.
The application also provides a sludge concentration process. The sludge concentration process comprises the following steps: obtaining sludge and a flocculating agent; mixing the sludge and the flocculant together to obtain primary sludge; performing spiral dispersion suction filtration operation on the primary sludge so as to remove free water by suction filtration in shearing mixing of the primary sludge and obtain secondary sludge; and performing plate and frame filter pressing operation on the secondary sludge to obtain concentrated sludge.
According to the sludge concentration process, the sludge and the flocculating agent are mixed, namely the flocculating agent is fully utilized to realize separation of free water in the sludge, effective separation of the free water in the sludge is effectively ensured under the reduction of the using amount of the flocculating agent, then, on the basis of ensuring effective separation of the free water in the sludge, the primary sludge is sheared and mixed in the spiral extrusion process, namely the primary sludge fully and effectively releases the inner free water under the action of shearing force, and then the suction filtration is synchronously matched, so that the free water released by the action of the shearing force of the sludge is synchronously and rapidly subjected to suction filtration separation under the action of the suction filtration, the correction control equipment of the filter cloth in the belt filter press is prevented from being additionally arranged, the structure simplification of the sludge concentration equipment and the simplification of the control program are realized, and then, the plate frame filter pressing operation is performed after the primary sludge is subjected to suction filtration, namely the extrusion condensation under the action of gravity, the efficiency of the plate frame is effectively improved, namely the concentration efficiency of water content lower than 50% under the condition that the time of the plate frame filter pressing is shorter, the sludge is effectively concentrated, and the stability of the sludge is ensured.
In order to better understand the sludge concentration process of the present application, the sludge concentration process of the present application is further explained as follows:
referring to fig. 10, the sludge concentration process of an embodiment includes the following steps:
s100, obtaining sludge and flocculant. It is understood that the flocculant and sludge are obtained to achieve efficient removal of free water from the sludge.
And S200, mixing the sludge and the flocculant together to obtain primary sludge. It can be appreciated that mixing of the sludge and the flocculant, i.e. making the flocculant fully utilized for effecting the disengagement of the free water in the sludge, effectively ensures that the free water in the sludge is effectively disengaged with a reduced amount of flocculant used.
S300, performing spiral dispersion suction filtration operation on the primary sludge, so that the primary sludge is subjected to suction filtration in shearing mixing to remove free water, and secondary sludge is obtained. It can be understood that on the basis of ensuring effective separation of free water in sludge, the primary sludge is sheared and mixed in the spiral extrusion process, namely, the primary sludge fully and effectively releases the internal free water under the action of shearing force, and then the suction filtration is synchronously matched, so that the free water released by the sludge under the action of shearing force is synchronously and rapidly separated by the suction filtration, the concentration stability and efficiency of the sludge are ensured, the addition of correction control equipment in the transmission process of filter cloth 123 in a belt filter press is avoided, and the structural simplification of the sludge concentration equipment and the simplification of a control program are realized.
S400, performing plate and frame filter pressing operation on the secondary sludge to obtain concentrated sludge. It can be understood that the plate-frame filter pressing operation is performed after the first-stage sludge is subjected to suction filtration, namely, the extrusion condensation is performed under the action of gravity, so that the efficiency of the plate-frame filter pressing is effectively improved, namely, the concentrated sludge with the water content lower than 50% can be obtained under the condition that the time of the plate-frame filter pressing is shorter, and further, the concentration efficiency of the sludge is further effectively ensured.
According to the sludge concentration process, the sludge and the flocculating agent are mixed, namely the flocculating agent is fully utilized to realize separation of free water in the sludge, effective separation of the free water in the sludge is effectively ensured under the reduction of the using amount of the flocculating agent, then, on the basis of ensuring effective separation of the free water in the sludge, the primary sludge is sheared and mixed in the spiral extrusion process, namely the primary sludge fully and effectively releases the inner free water under the action of shearing force, and then the suction filtration is synchronously matched, so that the free water released by the action of the shearing force of the sludge is synchronously and rapidly subjected to suction filtration separation under the action of the suction filtration, the correction control equipment of the filter cloth in the belt filter press is prevented from being additionally arranged, the structure simplification of the sludge concentration equipment and the simplification of the control program are realized, and then, the plate frame filter pressing operation is performed after the primary sludge is subjected to suction filtration, namely the extrusion condensation under the action of gravity, the efficiency of the plate frame is effectively improved, namely the concentration efficiency of water content lower than 50% under the condition that the time of the plate frame filter pressing is shorter, the sludge is effectively concentrated, and the stability of the sludge is ensured.
In one embodiment, the spiral dispersion suction filtration operation is performed on the primary sludge, specifically: carry out screw transportation to the one-level mud to make one-level mud shear mixing, carry out the suction filtration to the one-level mud in step, so that the one-level mud removes free water in shear mixing suction filtration, realized better that the free water that mud released under the effect of shearing force is synchronous by abundant quick suction filtration separation under suction filtration, and then ensured concentration stability and the efficiency of mud effectively.
In one embodiment, a one-stage spiral mixer is used to mix the sludge and the flocculant together, i.e., the sludge and the flocculant are fed into the mixing tank from the inlet of the one-stage spiral mixer and are rotated in the mixing tank by the mixing screw, so that the sludge and the flocculant are sufficiently and rapidly mixed under the shearing mixing effect.
In one embodiment, the two-stage spiral suction filter is adopted to perform spiral dispersion suction filtration operation on the primary sludge, namely, the sludge subjected to dehydration treatment of the flocculant enters the mixing shell, and a spiral rod connected in a rotating manner is arranged in the mixing shell, so that the sludge in the mixing shell is easier to release inside free water under the action of shearing force, and then the filter cloth, the suction filtration shell and the suction filtration box are matched, so that the free water released by the sludge under the action of the shearing force is synchronously and sufficiently and quickly suction-filtered into the suction filtration box through the suction filtration shell, and the concentration stability and efficiency of the sludge are ensured.
In one embodiment, the secondary sludge is subjected to plate and frame filter pressing operation by adopting a sludge compression device, and the sludge compression device is a conventional plate and frame type sludge dehydrator used by a sludge concentration process worker, so that the sufficient filtration and removal of water in the secondary sludge are better ensured.
The filter cloth is conventionally used for filtering sludge; the suction filter is a suction filter conventionally used for sludge suction filtration; the motor and the mixing motor are both motors conventionally used for sludge mixing; the sludge pump is a sludge pump conventionally used for sludge transfer.
Compared with the prior art, the application has at least the following advantages:
according to the sludge concentration system 10, the inlet 103 of the first-stage spiral mixer 110 is used for inputting the sludge and the flocculating agent so as to realize rapid and full mixing of the sludge and the flocculating agent in a spiral mixing mode, so that full utilization of the flocculating agent is effectively ensured, more separation of free water in the sludge is realized, the utilization rate of the flocculating agent is further realized, the use of the flocculating agent is reduced, and the dehydration rate of the sludge is better ensured; in addition, one end of the mixing shell 121 is communicated with the outlet 104 of the one-section spiral mixer 110, the filter cloth 123 is at least shielded at the water leakage hole 101, the suction shell 124 is sleeved on the mixing shell 121, the water leakage hole 101 is communicated with the suction shell 124, the suction shell 124 is communicated with the suction box 126 through the suction tube 125, even if the sludge subjected to the dehydration treatment of the flocculating agent enters the mixing shell 121, the spiral rod 122 which is rotationally connected is arranged in the mixing shell 121, so that the sludge in the mixing shell 121 releases the free water in the interior more easily under the action of shearing force, and then the filter cloth 123, the suction shell 124 and the suction box 126 are matched, so that the free water released by the action of the shearing force of the sludge is synchronously and sufficiently and quickly suction-filtered into the suction box 126 through the suction shell 124, the concentration stability and efficiency of the sludge are ensured, and the addition of correction control equipment for the transmission process of the filter cloth 123 in the belt filter press is avoided, namely the structure simplification and the control program simplification of the sludge concentration equipment are realized.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A sludge thickening system, comprising:
the mud-water separation device comprises a first-stage spiral mixer and a second-stage spiral filter, wherein the inlet of the first-stage spiral mixer is used for inputting sludge and flocculant;
the two-section spiral suction filter comprises a mixing shell, a screw rod, filter cloth, a suction filtration shell, a suction filtration pipe and a suction filtration box, wherein a water leakage hole is formed in the inner wall of the mixing shell, one end of the mixing shell is communicated with an outlet of the one-section spiral mixer, the screw rod is arranged in the mixing shell, the two ends of the screw rod are respectively and rotatably connected with the mixing shell, the filter cloth is attached to the inner wall of the mixing shell, the filter cloth is at least shielded at the water leakage hole, the suction filtration shell is sleeved on the mixing shell, the water leakage hole is communicated with the suction filtration shell, the suction filtration shell is communicated with the suction filtration pipe, and the suction filtration shell is communicated with the suction filtration box through the suction filtration pipe;
and the inlet of the sludge compression device is communicated with the other end part of the mixing shell.
2. The sludge thickening system of claim 1 wherein the suction filtration tank comprises a water storage tank and a suction filtration machine, the water storage tank being in communication with the suction filtration housing through the suction filtration pipe, the suction filtration end of the suction filtration machine being in communication with the water storage tank.
3. The sludge thickening system of claim 2 wherein an end of the suction filter tube is positioned at a bottom of the water storage tank and a suction filter end of the suction filter is positioned at a top of the water storage tank; and/or the number of the groups of groups,
the storage tank is used for storing 80% of water at most.
4. The sludge concentration system of claim 2 wherein the water storage tank is provided with a water outlet, the water outlet being located at the bottom of the water storage tank.
5. The sludge concentration system of claim 1, wherein the screw rod comprises a rotating roller, screw blades and a soft scraping plate, the rotating roller is arranged in the mixing shell, two ends of the rotating roller are respectively in rotary connection with the mixing shell, the screw blades are sleeved on the rotating roller, the soft scraping plate is arranged on the periphery of one side, away from the rotating roller, of the screw blades, and the soft scraping plate is in butt joint with the filter cloth.
6. The sludge thickening system of claim 1 wherein the two-stage spiral suction filter further comprises a motor, wherein one end of the rotating roller protrudes at least partially from the mixing housing and is connected to a power output of the motor.
7. The sludge thickening system of claim 1 further comprising a sludge pump, wherein the outlet of the one-stage helical mixer communicates with an end of the mixing housing through the sludge pump.
8. The sludge concentration system of claim 1 wherein the one-stage spiral mixer comprises a mixing screw, a mixing tank and a mixing motor, wherein the mixing screw is disposed in the mixing tank, one end of the mixing screw at least partially protrudes from the mixing tank and is connected with a power output end of the mixing motor, two ends of the mixing screw are respectively rotatably connected with the mixing screw, the mixing tank is provided with an inlet and an outlet, and the inlet and the outlet are respectively positioned at two ends of the mixing tank.
9. The sludge concentration process is characterized by comprising the following steps of:
obtaining sludge and a flocculating agent;
mixing the sludge and the flocculant together to obtain primary sludge;
performing spiral dispersion suction filtration operation on the primary sludge so as to remove free water by suction filtration in shearing mixing of the primary sludge, thereby obtaining secondary sludge;
and performing plate and frame filter pressing operation on the secondary sludge to obtain concentrated sludge.
10. The sludge concentration process of claim 9 wherein the primary sludge is subjected to a spiral dispersion suction filtration operation, specifically: and carrying out spiral conveying on the primary sludge so as to enable the primary sludge to be sheared and mixed, and synchronously carrying out suction filtration on the primary sludge so as to enable the primary sludge to be subjected to suction filtration in the shearing and mixing process to remove free water.
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