CN114230135A - Sludge treatment and disposal technology - Google Patents
Sludge treatment and disposal technology Download PDFInfo
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- CN114230135A CN114230135A CN202111494296.3A CN202111494296A CN114230135A CN 114230135 A CN114230135 A CN 114230135A CN 202111494296 A CN202111494296 A CN 202111494296A CN 114230135 A CN114230135 A CN 114230135A
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- Prior art keywords
- sludge
- treatment
- water
- conditioning
- dehydration
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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
- 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
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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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
Abstract
The invention discloses a sludge treatment technology, which comprises the following steps: the method comprises the following steps: conditioning modification: the chitosan and the oxalic acid are added into the sludge tank to condition the sludge, so that the absorbed water and the combined water which are difficult to remove in the sludge are converted into free water which is easy to remove, and the dehydration performance of the sludge is improved. The invention can electrically neutralize and flocculate sludge particles by adding chitosan, can effectively promote the hydrolysis of extracellular polymers by adding oxalic acid, and can simultaneously react with Ca2+Precipitate formation, high dry dehydration: reducing the water content of the sludge to below 60% by using a filter pressing system, and drying and carbonizing: in an oxygen-free environment, the opposite dehydrationThe sludge after water is continuously heated for 2 hours, and the sludge treated by the whole technical scheme realizes the harmlessness and the high reduction of the sludge, solves the problems of insufficient sludge modified by the traditional flocculating agent and low dehydration rate, and simultaneously converts the dewatered sludge into sludge-based biochar to realize the resource utilization of the sludge.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge treatment technology.
Background
Sludge treatment is the process of minimizing, stabilizing and innocent treatment to sludge, and the technique that traditional sludge dewatering treatment mode often adopted is for adding the flocculating agent, but conventional flocculating agent can not improve the dehydration degree of sludge, and the constraint water by EPS parcel can't be got rid of, and a large amount of moisture still is locked and can't be released in the mud granule, can't carry out the abundant processing to sludge and improve, simultaneously, long-term use will probably lead to secondary environmental pollution problems such as heavy metal enrichment in the mud.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide a sludge treatment technology, which has the advantage of converting sludge into sludge-based biochar and solves the problem that the sludge cannot be fully treated and improved in the traditional sludge dewatering treatment mode.
In order to achieve the purpose, the invention provides the following technical scheme: a sludge treatment disposal technique comprising: the method comprises the following steps:
conditioning modification: adding chitosan and oxalic acid into a sludge pool to condition sludge, so that adsorbed water and bound water which are difficult to remove in the sludge are converted into free water which is easy to remove, and the dehydration performance of the sludge is improved, wherein the ratio of the chitosan is 0.01-0.05g/g of dry sludge, the ratio of the oxalic acid is 0.2-0.7g/g of dry sludge, and the pH value is controlled to be 2-3;
high-dry dehydration: the sludge after conditioning and modification is subjected to multiple feeding and multi-stage squeezing by using a filter pressing system to promote sludge-water separation in the sludge, the water content of the sludge is reduced to below 60%, reduction is realized, and subsequent treatment and utilization are facilitated;
drying and carbonizing: based on the high-temperature instability of organic matters, the sludge after high-dryness dehydration is subjected to drying carbonization treatment by exogenous heating, harmful substances such as microorganisms, pathogens, stable heavy metals and the like are synchronously killed in the heating process, the heating environment is an anaerobic environment, the temperature is 600-fold-water 700 ℃, and the drying carbonization treatment lasts for 2 hours. The yield of the biochar is 65-70%.
Preferably, in the conditioning modification, in the conditioning process, the sludge is stirred by a stirring device, so that the contact probability of the sludge with the chitosan and the oxalic acid is improved, and further the conditioning efficiency is improved.
Preferably, in the conditioning modification, in the conditioning process, oxalic acid and chitosan are poured into the sprayer, and then are uniformly sprayed out through the sprayer, so that the conditioning uniformity of the oxalic acid and the chitosan is improved.
Preferably, the high-dry dewatering is implemented by detecting sludge through a soil moisture detection device after mud and water are separated, so that a user can conveniently know the water content of the sludge, and the phenomenon of resource waste caused by repeated squeezing is avoided.
Preferably, the high-dryness dewatering filter plate filters sewage after filter pressing, so that impurities can be prevented from being discharged along with the sewage, and the sewage can be conveniently purified subsequently.
Preferably, in the high-dry dehydration and filter pressing process, the sludge is subjected to filter pressing by a full-automatic plate-and-frame filter press, so that the transportation, drying and incineration costs can be reduced, and conditions are created for further drying and carbonization.
As the optimal selection of the invention, the drying carbonization is realized, the sludge is heated by the high-temperature heating pipe, the energy is saved, and the heating efficiency is higher.
Preferably, in the drying carbonization process, the temperature in the heating cavity is detected by the temperature sensor, so that the phenomenon of sludge damage caused by overhigh temperature is avoided.
Compared with the prior art, the invention has the following beneficial effects:
1. the chitosan used in the invention is safe, nontoxic and easy to degrade, has an electric neutralization flocculation effect on sludge particles, effectively promotes the hydrolysis of extracellular polymers through oxalic acid, and simultaneously can react with Ca2+The sediment is formed, meanwhile, an acid environment can be provided for chitosan, the sludge treated by the whole technical scheme realizes the harmlessness and high reduction of the sludge, and the final product is sludge-based biochar which can realize further resource utilization.
2. Compared with the physical hydrothermal, ultrasonic and other treatment modes, the technology is simple to operate, complex process equipment is not needed, compared with the existing composting, incineration and other technologies, the sludge carbonization technology has the advantages of no secondary pollution, energy conservation, emission reduction, high product added value and the like, the problem that the traditional sludge dehydration treatment mode cannot fully treat and improve the sludge is solved, the sludge can be fully treated and improved, the dehydration degree of the sludge is improved, and the phenomenon of secondary environmental pollution caused by heavy metal enrichment and the like in the sludge is avoided.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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 invention.
The first embodiment is as follows:
a sludge treatment disposal technique comprising: the method comprises the following steps:
conditioning modification: adding chitosan and oxalic acid into a sludge pool to condition sludge, so that adsorbed water and bound water which are difficult to remove in the sludge are converted into free water which is easy to remove, and the dehydration performance of the sludge is improved, wherein the ratio of the chitosan is 0.01g/g of dry sludge, the ratio of the oxalic acid is 0.2g/g of dry sludge, and the pH value is controlled to be 2;
high-dry dehydration: the sludge after conditioning and modification is subjected to multiple feeding and multi-stage squeezing by using a filter pressing system to promote sludge-water separation in the sludge, the water content of the sludge is reduced to below 60%, reduction is realized, and subsequent treatment and utilization are facilitated;
drying and carbonizing: based on the high-temperature instability of organic matters, the sludge after high-dryness dehydration is subjected to drying carbonization treatment by exogenous heating, harmful substances such as microorganisms, pathogens, stable heavy metals and the like are synchronously killed in the heating process, the heating environment is an anaerobic environment, the temperature is 600 ℃, and the drying carbonization treatment lasts for 2 hours. The biochar yield was 65%.
Example two:
a sludge treatment disposal technique comprising: the method comprises the following steps:
conditioning modification: adding chitosan and oxalic acid into a sludge pool to condition sludge, so that adsorbed water and bound water which are difficult to remove in the sludge are converted into free water which is easy to remove, and the dehydration performance of the sludge is improved, wherein the ratio of the chitosan is 0.03g/g of dry sludge, the ratio of the oxalic acid is 0.5g/g of dry sludge, and the pH value is controlled to be 2.5;
high-dry dehydration: the sludge after conditioning and modification is subjected to multiple feeding and multi-stage squeezing by using a filter pressing system to promote sludge-water separation in the sludge, the water content of the sludge is reduced to below 60%, reduction is realized, and subsequent treatment and utilization are facilitated;
drying and carbonizing: based on the high-temperature instability of organic matters, the sludge after high-dryness dehydration is subjected to drying carbonization treatment by exogenous heating, harmful substances such as microorganisms, pathogens, stable heavy metals and the like are synchronously killed in the heating process, the heating environment is an anaerobic environment, the temperature is 650 ℃, and the drying carbonization treatment lasts for 2 hours. The biochar yield was 67%.
Example three:
a sludge treatment disposal technique comprising: the method comprises the following steps:
conditioning modification: adding chitosan and oxalic acid into a sludge pool to condition sludge, so that adsorbed water and bound water which are difficult to remove in the sludge are converted into free water which is easy to remove, and the dehydration performance of the sludge is improved, wherein the ratio of the chitosan is 0.05g/g of dry sludge, the ratio of the oxalic acid is 0.7g/g of dry sludge, and the pH value is controlled to be 3;
high-dry dehydration: the sludge after conditioning and modification is subjected to multiple feeding and multi-stage squeezing by using a filter pressing system to promote sludge-water separation in the sludge, the water content of the sludge is reduced to below 60%, reduction is realized, and subsequent treatment and utilization are facilitated;
drying and carbonizing: based on the high-temperature instability of organic matters, the sludge after high-dryness dehydration is subjected to drying carbonization treatment by exogenous heating, harmful substances such as microorganisms, pathogens, stable heavy metals and the like are synchronously killed in the heating process, the heating environment is an anaerobic environment, the temperature is 700 ℃, and the drying carbonization treatment lasts for 2 hours. The biochar yield was 70%.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A sludge treatment and disposal technology is characterized in that: the method comprises the following steps: the method comprises the following steps:
conditioning modification: adding chitosan and oxalic acid into a sludge pool to condition sludge, so that adsorbed water and bound water which are difficult to remove in the sludge are converted into free water which is easy to remove, and the dehydration performance of the sludge is improved, wherein the ratio of the chitosan is 0.01-0.05g/g of dry sludge, the ratio of the oxalic acid is 0.2-0.7g/g of dry sludge, and the pH value is controlled to be 2-3;
high-dry dehydration: the sludge after conditioning and modification is subjected to multiple feeding and multi-stage squeezing by using a filter pressing system to promote sludge-water separation in the sludge, the water content of the sludge is reduced to below 60%, reduction is realized, and subsequent treatment and utilization are facilitated;
drying and carbonizing: based on the high-temperature instability of organic matters, the sludge after high-dryness dehydration is subjected to drying carbonization treatment by exogenous heating, harmful substances such as microorganisms, pathogens, stable heavy metals and the like are synchronously killed in the heating process, the heating environment is an anaerobic environment, the temperature is 600-fold-water 700 ℃, and the drying carbonization treatment lasts for 2 hours. The yield of the biochar is 65-70%.
2. The sludge treatment and disposal technique according to claim 1, wherein: the conditioning modification is characterized in that in the conditioning process, the sludge is stirred by the stirring equipment, so that the contact probability of the sludge with chitosan and oxalic acid is improved, and the conditioning efficiency is improved.
3. The sludge treatment and disposal technique according to claim 1, wherein: according to the conditioning modification, in the conditioning process, oxalic acid and chitosan are poured into the sprayer and then are uniformly sprayed out through the sprayer, so that the conditioning uniformity of the oxalic acid and the chitosan is improved.
4. The sludge treatment and disposal technique according to claim 1, wherein: high dry dehydration, after mud-water separation, detect mud through soil moisture detection device, the person of facilitating the use knows the water content of mud, avoids causing the phenomenon of wasting of resources because of repeated squeezing.
5. The sludge treatment and disposal technique according to claim 1, wherein: high dry dehydration, after the filter-pressing, filter sewage through the filter, can avoid impurity along with sewage discharge, convenient follow-up carries out purification treatment to sewage.
6. The sludge treatment and disposal technique according to claim 1, wherein: during high dry dehydration and filter pressing, sludge is subjected to filter pressing through a full-automatic plate-and-frame filter press, so that the cost of transportation, drying and incineration can be reduced, and conditions are created for further drying and carbonization.
7. The sludge treatment and disposal technique according to claim 1, wherein: the drying carbonization is used for heating the sludge through the high-temperature heating pipe, so that the energy is saved, and meanwhile, the heating efficiency is higher.
8. The sludge treatment and disposal technique according to claim 1, wherein: in the drying carbonization and heating process, the temperature inside the heating cavity is detected through the temperature sensor, so that the phenomenon that the sludge is damaged due to overhigh temperature is avoided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111494296.3A CN114230135A (en) | 2021-12-08 | 2021-12-08 | Sludge treatment and disposal technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111494296.3A CN114230135A (en) | 2021-12-08 | 2021-12-08 | Sludge treatment and disposal technology |
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| CN114230135A true CN114230135A (en) | 2022-03-25 |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11188392A (en) * | 1997-12-26 | 1999-07-13 | Kurita Water Ind Ltd | Modification/solidification method of mud earth, mud water, or sludge of high water content |
| CN1654348A (en) * | 2005-01-20 | 2005-08-17 | 上海师范大学 | Composite flocculating agent for printing and dyeing waste water treatment |
| CN103664126A (en) * | 2012-09-20 | 2014-03-26 | 深圳市海川实业股份有限公司 | Sludge curing treatment agent and method for treating sludge by use of curing treatment agent |
| CN104926064A (en) * | 2015-05-25 | 2015-09-23 | 遵义师范学院 | Method for improving water-removing performance of urban sludge by coupling treatment of ultrasonic wave and chitosan |
| CN107487982A (en) * | 2017-09-22 | 2017-12-19 | 兴源环境科技股份有限公司 | A kind of feces of livestock and poultry desiccation conditioning medicament and desiccation dewatering process |
| CN108947200A (en) * | 2018-07-23 | 2018-12-07 | 安徽省通源环境节能股份有限公司 | A kind of modified deep dehydration of sludge conditioning and desiccation charing process technique |
| CN110040834A (en) * | 2019-04-23 | 2019-07-23 | 上海尚析环保设备有限公司 | A kind of all natural composite flocculation agent and its application of asepsis environment-protecting |
| CN110092569A (en) * | 2019-04-15 | 2019-08-06 | 华南理工大学 | A kind of mud dewatering method |
| CN110217971A (en) * | 2019-05-29 | 2019-09-10 | 安徽省通源环境节能股份有限公司 | A kind of sludge base charcoal preparation method and application |
| CN110590121A (en) * | 2019-08-30 | 2019-12-20 | 中山大学 | Sludge dehydrating agent and sludge dehydrating method |
| CN110937772A (en) * | 2019-12-11 | 2020-03-31 | 中冶华天工程技术有限公司 | Method for separating organic/inorganic components from sludge |
-
2021
- 2021-12-08 CN CN202111494296.3A patent/CN114230135A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11188392A (en) * | 1997-12-26 | 1999-07-13 | Kurita Water Ind Ltd | Modification/solidification method of mud earth, mud water, or sludge of high water content |
| CN1654348A (en) * | 2005-01-20 | 2005-08-17 | 上海师范大学 | Composite flocculating agent for printing and dyeing waste water treatment |
| CN103664126A (en) * | 2012-09-20 | 2014-03-26 | 深圳市海川实业股份有限公司 | Sludge curing treatment agent and method for treating sludge by use of curing treatment agent |
| CN104926064A (en) * | 2015-05-25 | 2015-09-23 | 遵义师范学院 | Method for improving water-removing performance of urban sludge by coupling treatment of ultrasonic wave and chitosan |
| CN107487982A (en) * | 2017-09-22 | 2017-12-19 | 兴源环境科技股份有限公司 | A kind of feces of livestock and poultry desiccation conditioning medicament and desiccation dewatering process |
| CN108947200A (en) * | 2018-07-23 | 2018-12-07 | 安徽省通源环境节能股份有限公司 | A kind of modified deep dehydration of sludge conditioning and desiccation charing process technique |
| CN110092569A (en) * | 2019-04-15 | 2019-08-06 | 华南理工大学 | A kind of mud dewatering method |
| CN110040834A (en) * | 2019-04-23 | 2019-07-23 | 上海尚析环保设备有限公司 | A kind of all natural composite flocculation agent and its application of asepsis environment-protecting |
| CN110217971A (en) * | 2019-05-29 | 2019-09-10 | 安徽省通源环境节能股份有限公司 | A kind of sludge base charcoal preparation method and application |
| CN110590121A (en) * | 2019-08-30 | 2019-12-20 | 中山大学 | Sludge dehydrating agent and sludge dehydrating method |
| CN110937772A (en) * | 2019-12-11 | 2020-03-31 | 中冶华天工程技术有限公司 | Method for separating organic/inorganic components from sludge |
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