CN113429103A - Deep dehydration method based on sludge wall breaking - Google Patents
Deep dehydration method based on sludge wall breaking Download PDFInfo
- Publication number
- CN113429103A CN113429103A CN202110770760.0A CN202110770760A CN113429103A CN 113429103 A CN113429103 A CN 113429103A CN 202110770760 A CN202110770760 A CN 202110770760A CN 113429103 A CN113429103 A CN 113429103A
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- Prior art keywords
- sludge
- wall breaking
- water content
- method based
- dehydration
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- 239000010802 sludge Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000018044 dehydration Effects 0.000 title claims abstract description 23
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 238000011085 pressure filtration Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000002910 solid waste Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000003756 stirring 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
- C02F11/121—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
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the field of sludge treatment, in particular to a deep dehydration method based on sludge wall breaking, which is used for solving the current sludge treatment situation that the water content of sludge in a sewage treatment plant is difficult to further reduce. The method comprises the steps of extracting sludge rich in biomass and having water content of 80-99 wt% from a storage tank, inputting the sludge into a wet superfine pulverizer through a pipeline for efficient reciprocating wall breaking, performing filter pressing dehydration on the sludge after wall breaking, and enabling the water content of the sludge after filter pressing to be less than or equal to 50 wt%, so as to achieve the purpose of deep dehydration of the sludge. Compared with the prior art, the invention has outstanding wall breaking effect on biological cells of the sludge, can obviously reduce the water content of the sludge on the premise of not adding any medicament, has wide subsequent utilization range of the dewatered sludge product, and accords with the treatment concept of solid waste recycling.
Description
Technical Field
The invention relates to the field of sludge treatment, in particular to a deep dehydration method based on sludge wall breaking.
Background
A sewage treatment plant inevitably generates a large amount of sludge in the process of treating sewage, and the water content of the sludge is generally more than 95 wt%. The high water content not only restricts the subsequent utilization of the sludge, but also has great adverse effect on the natural environment. The traditional physical mechanical method generally removes the water content of the sludge by about 20 wt%, and the physical method and the chemical dosing method are combined in the process to remove the water content more greatly. However, the addition of chemicals not only imposes a burden on the natural environment, but also restricts the range of utilization of the sludge after dehydration.
The novel sludge pretreatment process is developed, the sludge dehydration rate is improved, the subsequent biological treatment is promoted, the sludge treatment problem can be solved, the operating cost of a sewage treatment plant is reduced, the environment can be protected, resources and energy sources are recycled, and the method has great social, environmental and economic benefits.
Disclosure of Invention
The invention aims to overcome the defects of poor sludge water-containing effect and environmental influence in the prior art and provides a deep dehydration method based on sludge wall breaking.
In order to solve the technical problem, the technical scheme is that the deep dehydration method based on sludge wall breaking comprises the following steps:
s1, adding the sludge with the water content of 80-99 wt% into a wet-process superfine crusher with 5000-;
s2, performing filter pressing dehydration on the crushed sludge, wherein the water content of the sludge after filter pressing is less than or equal to 50 wt%. Comprises the following steps of;
the deep dehydration method based on sludge wall breaking is further improved as follows:
preferably, the wall breaking time of the wet ultra-fine pulverization in the step S1 is 10-60 min.
Preferably, the power of the wet ultra-fine pulverization in the step S1 is not less than 2200W.
Preferably, the particle size of the crushed sludge in the step S1 is 0.05-0.075 mm.
Preferably, the filter-press dehydration in the step S2 adopts positive pressure filter dehydration.
Compared with the prior art, the invention has the beneficial effects that:
1) the application discloses deep dehydration method based on sludge wall breaking, high-efficiency reciprocating wall breaking is carried out on high-water-content sludge rich in biological cells in a wet-process ultrafine grinder, then filter-pressing dehydration is carried out on the sludge after wall breaking to separate mud from water, and therefore speed dehydration of the sludge is achieved.
The wet-process ultrafine pulverizer takes a stator and a rotor as main components, the stator and the rotor in a cavity generate circulation when stirring fluid, the sludge fluid can generate turbulence effect in a pulverizing cavity, the turbulence effect can cause shearing action on materials, and the materials are extruded and cut in a reciprocating manner; the efficient wall breaking of the sludge can be realized by freely adjusting the wall breaking gear and time; the method skillfully utilizes the characteristics of high water content and easy flowing of the sludge, and greatly reduces the process energy consumption.
2) The prior art adopts the mode of freezing sludge or adding a wall-breaking medicament to improve the dehydration performance of sludge, and the utilized principle is as follows: the sludge particles are enlarged after freezing or adding a medicament, so that filter pressing is facilitated, the water content of the sludge subjected to filter pressing is reduced, but most of internal water in the sludge is not removed by the wall breaking methods. Different from the conventional wall breaking method, the wet-process ultrafine grinder is used, the sludge structure in the grinding cavity is damaged, part of bonding bonds are broken, and most of interstitial water, part of capillary water of sludge particles and water in the sludge particles in a sludge flocculation group are released to form free water; the binding energy between the sludge particles and the binding water adsorbed on the surface of the sludge particles is also destroyed to a certain degree, the solid-liquid separation of the sludge is realized to a certain degree, and the effect of subsequent sludge dewatering can be further improved.
3) The wet ultrafine grinding technology has a reliable effect on breaking the wall of biological cells in the sludge, can obviously reduce the water content of the sludge by adopting the wet ultrafine grinding with the rotation speed of 5000-.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
Pumping sludge with the water content of 99 wt% into a wet-process ultrafine grinder, starting the wet-process ultrafine grinder with the model of first Sheng SS-7010 in a laboratory simulation experiment, setting a wall breaking gear to be 5000rpm, and breaking the wall for 60 minutes;
and dehydrating the sludge after the sufficient wall breaking through a filter pressing device, and measuring the water content of the sludge to be 47.3 wt%.
Example 2
Pumping sludge with the water content of 96 wt% into a wet-process ultrafine grinder, starting the wet-process ultrafine grinder with the model of the first saint SS-7010 in a laboratory simulation experiment, setting a wall breaking gear at 8000rpm, and breaking the wall for 45 minutes;
and dehydrating the sludge after the sufficient wall breaking through a filter pressing device, and measuring the water content of the sludge to be 46.8 wt%.
Example 3
Pumping sludge with water content of 90 wt% into a wet superfine pulverizer, starting the wet superfine pulverizer in a laboratory simulation experiment with the model of the wet superfine pulverizer as Shong SS-7010, setting a wall breaking gear at 10000rpm, and breaking wall for 30 minutes;
and dehydrating the sludge after the sufficient wall breaking through a filter pressing device, and measuring the water content of the sludge to be 48.2 wt%.
Example 4
Pumping sludge with the water content of 80 wt% into a wet-process ultrafine grinder, starting the wet-process ultrafine grinder with the model of first Sheng SS-7010 in a laboratory simulation experiment, setting a wall breaking gear to 20000rpm, and breaking the wall for 15 minutes;
and dehydrating the sludge after the sufficient wall breaking through a filter pressing device, and measuring the water content of the sludge to be 48.7 wt%.
The test results of the examples 1 to 4 show that the technical scheme of the application can obviously reduce the water content of the sludge from 80 to 99 wt% to below 50 wt%, has the advantages of low energy consumption, high efficiency and the like, and is convenient to popularize and apply.
It should be understood by those skilled in the art that the foregoing is only illustrative of several embodiments of the invention, and not of all embodiments. It should be noted that many variations and modifications are possible to those skilled in the art, and all variations and modifications that do not depart from the gist of the invention are intended to be within the scope of the invention as defined in the appended claims.
Claims (5)
1. A deep dehydration method based on sludge wall breaking is characterized by comprising the following steps:
s1, adding the sludge with the water content of 80-99 wt% into a wet-process superfine crusher with 5000-;
s2, performing filter pressing dehydration on the crushed sludge, wherein the water content of the sludge after filter pressing is less than or equal to 50 wt%.
2. The deep dewatering method based on sludge wall breaking according to claim 1, wherein the wall breaking time of the wet ultra-fine pulverization in the step S1 is 10-60 min.
3. The deep dewatering method based on sludge wall breaking according to claim 1, wherein the power of the wet ultra-fine pulverization in step S1 is not less than 2200W.
4. The deep dewatering method based on sludge wall breaking according to claim 1, wherein the particle size of the sludge after breaking in step S1 is 0.05-0.075 mm.
5. The deep dehydration method based on sludge wall breaking according to claim 1, characterized in that said pressure filtration dehydration in step S2 employs positive pressure filtration dehydration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110770760.0A CN113429103A (en) | 2021-07-08 | 2021-07-08 | Deep dehydration method based on sludge wall breaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110770760.0A CN113429103A (en) | 2021-07-08 | 2021-07-08 | Deep dehydration method based on sludge wall breaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113429103A true CN113429103A (en) | 2021-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110770760.0A Pending CN113429103A (en) | 2021-07-08 | 2021-07-08 | Deep dehydration method based on sludge wall breaking |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785852A (en) * | 1995-04-06 | 1998-07-28 | Midwest Research Institute | Pretreatment of high solid microbial sludges |
| CN103253842A (en) * | 2013-03-28 | 2013-08-21 | 上海同臣环保有限公司 | Sludge deep dewatering treatment system and process |
| CN204918344U (en) * | 2015-08-26 | 2015-12-30 | 成都泰宏节能环保设备有限公司 | Processing system of mud degree of depth dehydration |
| CN106495414A (en) * | 2016-12-14 | 2017-03-15 | 广东科达洁能股份有限公司 | A kind of city sewage deep treatment method |
| CN106902930A (en) * | 2017-02-16 | 2017-06-30 | 中南大学 | A kind of sludge organism body cell means for breaking walls and its method for sludge organism body cell broken wall |
| CN110183072A (en) * | 2019-06-27 | 2019-08-30 | 上海兴环生态科技有限公司 | A kind of sewage plant sludge filter-press dehydration processing method for realizing high-efficiency wall breaking |
-
2021
- 2021-07-08 CN CN202110770760.0A patent/CN113429103A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785852A (en) * | 1995-04-06 | 1998-07-28 | Midwest Research Institute | Pretreatment of high solid microbial sludges |
| CN103253842A (en) * | 2013-03-28 | 2013-08-21 | 上海同臣环保有限公司 | Sludge deep dewatering treatment system and process |
| CN204918344U (en) * | 2015-08-26 | 2015-12-30 | 成都泰宏节能环保设备有限公司 | Processing system of mud degree of depth dehydration |
| CN106495414A (en) * | 2016-12-14 | 2017-03-15 | 广东科达洁能股份有限公司 | A kind of city sewage deep treatment method |
| CN106902930A (en) * | 2017-02-16 | 2017-06-30 | 中南大学 | A kind of sludge organism body cell means for breaking walls and its method for sludge organism body cell broken wall |
| CN110183072A (en) * | 2019-06-27 | 2019-08-30 | 上海兴环生态科技有限公司 | A kind of sewage plant sludge filter-press dehydration processing method for realizing high-efficiency wall breaking |
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Application publication date: 20210924 |