CN108706707B - Implementation method for resource utilization of polysilicate metal and fly ash - Google Patents
Implementation method for resource utilization of polysilicate metal and fly ash Download PDFInfo
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- CN108706707B CN108706707B CN201810623448.7A CN201810623448A CN108706707B CN 108706707 B CN108706707 B CN 108706707B CN 201810623448 A CN201810623448 A CN 201810623448A CN 108706707 B CN108706707 B CN 108706707B
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to an implementation method for treating wastes, in particular to an implementation method for resource utilization of polysilicate metal and fly ash, which mainly comprises the following steps: collecting fly ash, preparing polysilicate metal salt coagulant, applying the polysilicate metal salt coagulant to the treatment of wastewater, repeatedly preparing the polysilicate metal salt coagulant, collecting fly ash generated by incineration treatment of sludge generated after wastewater treatment by adopting the polysilicate metal salt-fly ash coagulant, and repeatedly utilizing repeated reaction to recover heavy metal from the fly ash; the invention adopts fly ash to prepare polysilicate metal coagulant, applies the coagulant in wastewater treatment, and generates sludge which is burned to obtain fly ash again, and then the fly ash can be applied in preparing polysilicate metal coagulant and applying the polysilicate metal coagulant in wastewater and sludge treatment, thereby realizing the garbage treatment process of recycling, and increasing the concentration of metal ions after a plurality of times of garbage treatment, thereby efficiently recovering heavy metals.
Description
Technical Field
The invention relates to an implementation method for treating wastes, in particular to an implementation method for resource utilization of polysilicate metal and fly ash.
Background
In the application of garbage disposal, the garbage which can not be thoroughly decomposed or recycled is generally disposed by adopting a garbage burning or landfill method; after the garbage is burnt, most of minerals and toxic elements are concentrated in the burnt ash, so that the content of the toxic elements in the urban garbage burnt ash is 10-100 times greater than that in general soil, and researches show that the fly ash contains more mercury, lead, cadmium and other volatile heavy metals and dioxin and other highly toxic organic components than filter residues; many harmful heavy metals in the garbage are transferred into the fly ash, and because the heavy metals have high leaching property, if the heavy metals are directly buried, the heavy metals are dissolved out to pollute the living environment and endanger the health of human bodies.
At present, in the garbage treatment, a harmless treatment mode is followed, so that the aims of not damaging human health and not polluting surrounding natural environments including primary environment and secondary environment are achieved. The basic task of solid waste reclamation is to take process steps to recover useful materials and energy from the solid waste. At present, fly ash is treated by adopting a landfill treatment method, but the landfill fly ash is easy to leach heavy metals along with the time, and the peripheral environment is damaged. The method utilizes the fly ash to prepare the coagulant for treating the garbage wastewater, and the fly ash formed again is used for preparing the coagulant again for application, so that the heavy metal and the pollutants are continuously circulated in the circulation until the method has the value of secondary recovery.
Disclosure of Invention
In order to solve the above problems, the present invention aims to disclose an implementation method for treating waste, and particularly to an implementation method for resource utilization of polysilicate metal and fly ash.
In order to achieve the purpose, the invention adopts the technical scheme that: an implementation method for resource utilization of polysilicate metal and fly ash is characterized by comprising the following steps:
firstly, collecting fly ash: collecting fly ash generated by household garbage incineration, sludge incineration and coal combustion;
step two, preparing polysilicate metal coagulant:
1) the required preparation raw materials and the mass portions are as follows: 18mL1+1 sulfuric acid, 18g water glass, 25g aluminum chloride hexahydrate, 34g fly ash, 18g aluminum sulfate;
2) stirring the sulfuric acid and the water glass at a high speed to mix and react the sulfuric acid and the water glass, and then adding aluminum chloride hexahydrate for continuous stirring;
3) adding the collected fly ash into the fly ash, continuously stirring and mixing, curing through water bath at 60 ℃, cooling, and adding aluminum sulfate to prepare a polyaluminium silicate coagulant;
thirdly, applying polysilicate metal coagulant to the wastewater treatment: 5-40g of polyaluminium silicate coagulant is added into 5-6L of wastewater for coagulation treatment, and metal components in the wastewater are precipitated into sludge; the polyaluminium silicate coagulant is added into the wastewater to adsorb and neutralize the charges on the outer layer of the colloidal particles in the wastewater, and a double electric layer of the polyaluminium silicate coagulant is compressed to destabilize the colloidal particles, thereby achieving the effect of demulsification and coagulation; after mud-water separation, aluminum added into the coagulant and other metal ions in the wastewater exist in the mud cake; on one hand, the aluminum polysilicate coagulant neutralizes colloid with negative charge in the wastewater through the strong electric neutralization capacity of aluminum salt, and compresses a double electric layer of the colloid to destabilize the colloid; on the other hand, the high molecular weight characteristic of the polysilicic acid is utilized to adsorb colloidal particles to form bridges, so that the sedimentation of colloidal particles is accelerated, and the purpose of mud-water separation is achieved;
fourthly, repeatedly preparing polysilicate metal coagulant: adding fly ash according to the operation method for preparing the polysilicate metal coagulant in the second step to prepare the polysilicate metal coagulant, and repeatedly adding the polysilicate aluminum coagulant into the wastewater for further treatment so as to further precipitate metal components in the wastewater into sludge;
the polyaluminium silicate coagulant can be applied to wastewater treatment again, and metals such as aluminum in the coagulant can be transferred to sludge through the coagulation effect of the polyaluminium silicate coagulant;
fifthly, collecting the sludge generated after the coagulant treatment and burning the sludge, wherein the fly ash obtained after burning is repeatedly used for preparing the polysilicate metal coagulant;
and sixthly, recycling the fly ash and the coagulant to generate fly ash until the content of the metal in the fly ash is higher, and recovering the heavy metal.
An implementation method for resource utilization of polysilicate metal and fly ash is characterized by comprising the following steps:
firstly, collecting fly ash: collecting fly ash generated by household garbage incineration, sludge incineration and coal combustion;
step two, preparing polysilicate metal coagulant:
1) the required preparation raw materials and the mass portions are as follows: 18mL1+1 sulfuric acid, 18g water glass, 25g aluminum chloride hexahydrate, 34g fly ash, 18g aluminum sulfate;
2) stirring the sulfuric acid and the water glass at a high speed to mix and react the sulfuric acid and the water glass, and then adding aluminum chloride hexahydrate for continuous stirring;
3) adding the collected fly ash into the fly ash, continuously stirring and mixing, curing through water bath at 60 ℃, and adding aluminum sulfate after cooling to prepare a polysilicate aluminum coagulant;
thirdly, applying polysilicate metal coagulant to the wastewater treatment: 5-40g of polyaluminium silicate coagulant is added into 5-6L of wastewater for coagulation treatment, and metal components in the wastewater are precipitated into sludge; the polyaluminium silicate coagulant is added into the wastewater to adsorb and neutralize the charges on the outer layer of the colloidal particles in the wastewater, and a double electric layer of the polyaluminium silicate coagulant is compressed to destabilize the colloidal particles, thereby achieving the effect of demulsification and coagulation; after mud-water separation, aluminum added into the coagulant and other metal ions in the wastewater exist in the mud cake; on one hand, the aluminum polysilicate coagulant neutralizes colloid with negative charge in the wastewater through the strong electric neutralization capacity of aluminum salt, and compresses a double electric layer of the colloid to destabilize the colloid; on the other hand, the high molecular weight characteristic of the polysilicic acid is utilized to adsorb colloidal particles to form bridges, so that the sedimentation of colloidal particles is accelerated, and the purpose of mud-water separation is achieved;
step four, preparing secondary fly ash: collecting sludge and carrying out incineration treatment on the sludge so as to generate secondary fly ash; after incineration, fly ash is generated, and no agent needs to be added into the sludge again, and the sludge can be used as mud and can also be sludge without mud-water separation;
fifthly, preparing the polysilicate metal coagulant for the second time: taking the secondary fly ash as a filler, preparing the polysilicate metal coagulant again according to the preparation process of the polysilicate metal coagulant in the second step, applying the polysilicate metal coagulant to treatment of wastewater, burning the generated sludge to generate tertiary fly ash, and using the tertiary fly ash to prepare the polysilicate metal coagulant;
sixthly, circulating the processes of preparing the polysilicate metal coagulant, treating wastewater and burning the generated sludge to obtain fly ash, wherein the fly ash is used for preparing the polysilicate metal coagulant until the metal content in the fly ash exceeds 60 percent after N times of circulation, and then performing metal recovery treatment;
and seventhly, recovering the heavy metal.
The polysilicic acid metal salt coagulant is a solid coagulant.
In the second step, ferric chloride is added in the step 2) to prepare the solid polysilicate aluminum ferric coagulant.
In the second step, filler diatomite and white carbon black are added in the step 3) to prevent further polymerization of polysilicic acid.
The invention has the beneficial effects that: the invention adopts fly ash to prepare polysilicate metal coagulant, applies the coagulant in wastewater treatment, and generates sludge which is burned to obtain fly ash again, and then the fly ash can be applied in preparing polysilicate metal coagulant and applying the polysilicate metal coagulant in wastewater and sludge treatment, thereby realizing the garbage treatment process of recycling, and increasing the concentration of metal ions after a plurality of times of garbage treatment, thereby efficiently recovering heavy metals.
The polysilicate aluminum coagulant prepared by utilizing the fly ash can be used for treating various waste water, after the prepared coagulant is used for the waste water, heavy metals and harmful substances return to sludge to be incinerated again, the fly ash generated by incinerating the sludge is also used for preparing the coagulant again, the fly ash can be used for preparing the coagulant, and the coagulant can be used for treating the waste water and incinerating the sludge, so that the polysilicate metal coagulant prepared by recycling the fly ash can be continuously used for treating the waste water and treating the waste in a waste incineration plant; the process is circulated continuously until the heavy metal ions in the fly ash generated by the sludge are higher and have the value of secondary recovery, and the recovery is carried out at the moment.
Because the heavy metal in the fly ash is difficult to extract and secondarily utilize, the invention well utilizes the characteristics of the fly ash, the fly ash can provide metal ions for reaction and can also be used as a dry substance to prepare a coagulant for treating waste water before incineration; in addition, the drying agent is used as inert powder to block the contact between polysilicic acid particles, so that the further polymerization failure of the polysilicic acid product is prevented, the mechanism is similar to that a coating film is formed on the surface of a substance by adsorption, the effect of dewatering and preventing contact is achieved, the effect of stabilizing the product is achieved, the problem that the coagulant of the polysilicic acid is poor in stability is solved, and the solid polysilicic acid metal salt product which is difficult to produce in the market is produced. The aluminum sulfate, the diatomite, the fly ash, the white carbon black and the like which are added at last have the function of preventing further polymerization of the polysilicic acid; the substances are common medicaments in water treatment, and the effect of the total medicament is not influenced.
Detailed Description
The following detailed description of the embodiments of the invention:
the first embodiment is as follows:
an implementation method for resource utilization of polysilicate metal and fly ash is characterized by comprising the following steps:
firstly, collecting fly ash: collecting fly ash generated by household garbage incineration, sludge incineration and coal combustion;
step two, preparing polysilicate metal coagulant:
1) the required preparation raw materials and the mass portions are as follows: 18mL1+1 sulfuric acid, 18g water glass, 25g aluminum chloride hexahydrate, 34g fly ash, 18g aluminum sulfate;
2) stirring the sulfuric acid and the water glass at a high speed to mix and react the sulfuric acid and the water glass for 0.5 to 0.6 hour, and then adding aluminum chloride hexahydrate for continuous stirring;
3) adding the collected fly ash into the fly ash, continuously stirring and mixing, curing the fly ash in water bath at 60 ℃ for 2.1 to 2.3 hours, and adding aluminum sulfate after cooling to prepare a polyaluminium silicate coagulant;
thirdly, applying polysilicate metal coagulant to the wastewater treatment: when in treatment, one part of polyaluminium silicate coagulant can be used for treating 100-1000 parts of waste water, 10g of polyaluminium silicate coagulant is added into the waste water with the capacity of 5-6L for coagulation treatment, and metal components in the waste water are precipitated into sludge; the polyaluminium silicate coagulant belongs to a composite coagulant, can be added into the wastewater to adsorb and neutralize the charges on the outer layer of the colloidal particles in the wastewater, and compresses the double electric layers of the colloidal particles to destabilize the colloidal particles, thereby achieving the effect of demulsification and coagulation; after mud and water are separated, aluminum added into a coagulant and other metal ions in the wastewater exist in a mud cake, the metal ions in the wastewater are uncertain and need to be presumed according to fly ash, the metal precipitation rate is determined according to the ion components actually existing in the wastewater and the reaction degree of the fly ash, and the metal ions are treated to the national wastewater discharge standard by matching with other treatment processes; on one hand, the aluminum polysilicate coagulant neutralizes colloid with negative charge in the wastewater through the strong electric neutralization capacity of aluminum salt, and compresses a double electric layer of the colloid to destabilize the colloid; on the other hand, the high molecular weight characteristic of the polysilicic acid is utilized to adsorb colloidal particles to form bridges, so that the sedimentation of colloidal particles is accelerated, and the purpose of mud-water separation is achieved;
fourthly, repeatedly preparing polysilicate metal coagulant: adding fly ash according to the operation method for preparing the polysilicate metal coagulant in the second step to prepare the polysilicate metal coagulant, and repeatedly adding the polysilicate aluminum coagulant into the wastewater for further treatment so as to further precipitate metal components in the wastewater into sludge; the polyaluminium silicate coagulant can be applied to wastewater treatment again, and metals such as aluminum in the coagulant can be transferred to sludge through the coagulation effect of the polyaluminium silicate coagulant;
fifthly, collecting the sludge generated after the coagulant treatment and burning the sludge, wherein the fly ash obtained after burning is repeatedly used for preparing the polysilicate metal coagulant; when the polysilicate metal coagulant is used for treating sewage, after the polysilicate metal coagulant is added into the sewage, the produced colloidal particles with charges adsorb colloids in the sewage, so that mud and water are separated, and the produced mud is incinerated;
and sixthly, recycling the fly ash and the coagulant to generate fly ash until the content of the metal in the fly ash is higher, and recovering the heavy metal.
The polysilicic acid metal salt coagulant is a solid coagulant; the solid coagulant prepared by the steps has stronger stability and can be stored and utilized in a solid form; the fly ash has better application performance as a coagulant product, can be used as a wastewater and sludge treatment agent in the invention, can efficiently treat garbage and can be recycled, thereby generating fly ash with recycled metal value;
in the second step, ferric chloride is added in the step 2) to prepare a solid polysilicate aluminum ferric coagulant, which is also good in stability; and 3) adding filler diatomite and white carbon black in the step 3) to prevent further polymerization of the polysilicic acid.
Example two:
an implementation method for resource utilization of polysilicate metal and fly ash is characterized by comprising the following steps:
firstly, collecting fly ash: collecting fly ash generated by household garbage incineration, sludge incineration and coal combustion;
step two, preparing polysilicate metal coagulant:
1) the required preparation raw materials and the mass portions are as follows: 18mL1+1 sulfuric acid, 18g water glass, 25g aluminum chloride hexahydrate, 34g fly ash, 18g aluminum sulfate;
2) stirring the sulfuric acid and the water glass at a high speed to mix and react the sulfuric acid and the water glass, and then adding aluminum chloride hexahydrate for continuous stirring;
3) adding the collected fly ash into the fly ash, continuously stirring and mixing, curing through water bath at 60 ℃, and adding aluminum sulfate after cooling to prepare a polysilicate aluminum coagulant;
thirdly, applying polysilicate metal coagulant to the wastewater treatment: adding 10g of polyaluminium silicate coagulant into 5-6L of wastewater for coagulation treatment, and precipitating metal components in the wastewater into sludge; the polyaluminium silicate coagulant belongs to a composite coagulant, can be added into the wastewater to adsorb and neutralize the charges on the outer layer of the colloidal particles in the wastewater, and compresses the double electric layers of the colloidal particles to destabilize the colloidal particles, thereby achieving the effect of demulsification and coagulation; after mud and water are separated, aluminum added into a coagulant and other metal ions in the wastewater exist in a mud cake, the metal ions in the wastewater are uncertain and need to be presumed according to fly ash, the metal precipitation rate is determined according to the ion components actually existing in the wastewater and the reaction degree of the fly ash, and the metal ions are treated to the national wastewater discharge standard by matching with other treatment processes; on one hand, the aluminum polysilicate coagulant neutralizes colloid with negative charge in the wastewater through the strong electric neutralization capacity of aluminum salt, and compresses a double electric layer of the colloid to destabilize the colloid; on the other hand, the high molecular weight characteristic of the polysilicic acid is utilized to adsorb colloidal particles to form bridges, so that the sedimentation of colloidal particles is accelerated, and the purpose of mud-water separation is achieved;
step four, preparing secondary fly ash: collecting sludge and carrying out incineration treatment on the sludge so as to generate secondary fly ash; after incineration, fly ash is generated, and no agent needs to be added into the sludge again, and the sludge can be used as mud and can also be sludge without mud-water separation;
fifthly, preparing the polysilicate metal coagulant for the second time: taking the secondary fly ash as a filler, preparing the polysilicate metal coagulant again according to the preparation process of the polysilicate metal coagulant in the second step, applying the polysilicate metal coagulant to treatment of wastewater, burning the generated sludge to generate tertiary fly ash, and using the tertiary fly ash to prepare the polysilicate metal coagulant;
sixthly, circulating the processes of preparing the polysilicate metal coagulant, treating wastewater and burning the generated sludge to obtain fly ash, wherein the fly ash is used for preparing the polysilicate metal coagulant until the metal content in the fly ash exceeds 60 percent after N times of circulation, and then performing metal recovery treatment;
and seventhly, recovering the heavy metal.
The polysilicic acid metal salt coagulant is a solid coagulant; the solid coagulant prepared by the steps has stronger stability and can be stored and utilized in a solid form; the fly ash has better application performance as a coagulant product, can be used as a wastewater and sludge treatment agent in the invention, can efficiently treat garbage and can be recycled, thereby generating fly ash with recycled metal value;
in the second step, ferric chloride is added in the step 2) to prepare a solid polysilicate aluminum ferric coagulant, which is also good in stability; and 3) adding filler diatomite and white carbon black in the step 3) to prevent further polymerization of the polysilicic acid.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, and those skilled in the art may make modifications and variations within the spirit of the present invention, and all modifications, equivalents and modifications of the above embodiments according to the technical spirit of the present invention are within the scope of the present invention.
Claims (5)
1. An implementation method for resource utilization of polysilicate metal and fly ash is characterized by comprising the following steps:
firstly, collecting fly ash: collecting fly ash generated by household garbage incineration, sludge incineration and coal combustion;
step two, preparing polysilicate metal coagulant:
1) the required preparation raw materials and the mass portions are as follows: 18mL1+1 sulfuric acid, 18g water glass, 25g aluminum chloride hexahydrate, 34g fly ash, 18g aluminum sulfate;
2) stirring the sulfuric acid and the water glass at a high speed to mix and react the sulfuric acid and the water glass, and then adding aluminum chloride hexahydrate for continuous stirring;
3) adding the collected fly ash into the fly ash, continuously stirring and mixing, curing through water bath at 60 ℃, and adding aluminum sulfate after cooling to prepare a polysilicate aluminum coagulant;
thirdly, applying polysilicate metal coagulant to the wastewater treatment: 5-40g of polyaluminium silicate coagulant is added into 5-6L of wastewater for coagulation treatment, and metal components in the wastewater are precipitated into sludge; the polyaluminium silicate coagulant is added into the wastewater to adsorb and neutralize the charges on the outer layer of the colloidal particles in the wastewater, and a double electric layer of the polyaluminium silicate coagulant is compressed to destabilize the colloidal particles, thereby achieving the effect of demulsification and coagulation; after mud-water separation, aluminum added into the coagulant and other metal ions in the wastewater exist in the mud cake;
fourthly, repeatedly preparing polysilicate metal coagulant: adding fly ash according to the operation method for preparing the polysilicate metal coagulant in the second step to prepare the polysilicate metal coagulant, and repeatedly adding the polysilicate aluminum coagulant into the wastewater for further treatment so as to further precipitate metal components in the wastewater into sludge;
fifthly, collecting the sludge generated after the coagulant treatment and burning the sludge, wherein the fly ash obtained after burning is repeatedly used for preparing the polysilicate metal coagulant;
and sixthly, recycling the fly ash and the coagulant to generate fly ash until the content of the metal in the fly ash is higher, and recovering the heavy metal.
2. An implementation method for resource utilization of polysilicate metal and fly ash is characterized by comprising the following steps:
firstly, collecting fly ash: collecting fly ash generated by household garbage incineration, sludge incineration and coal combustion;
step two, preparing polysilicate metal coagulant:
1) the required preparation raw materials and the mass portions are as follows: 18mL1+1 sulfuric acid, 18g water glass, 25g aluminum chloride hexahydrate, 34g fly ash, 18g aluminum sulfate;
2) stirring the sulfuric acid and the water glass at a high speed to mix and react the sulfuric acid and the water glass, and then adding aluminum chloride hexahydrate for continuous stirring;
3) adding the collected fly ash into the fly ash, continuously stirring and mixing, curing through water bath at 60 ℃, and adding aluminum sulfate after cooling to prepare a polysilicate aluminum coagulant;
thirdly, applying polysilicate metal coagulant to the wastewater treatment: 5-40g of polyaluminium silicate coagulant is added into 5-6L of wastewater for coagulation treatment, and metal components in the wastewater are precipitated into sludge; the polyaluminium silicate coagulant is added into the wastewater to adsorb and neutralize the charges on the outer layer of the colloidal particles in the wastewater, and a double electric layer of the polyaluminium silicate coagulant is compressed to destabilize the colloidal particles, thereby achieving the effect of demulsification and coagulation; after mud-water separation, aluminum added into the coagulant and other metal ions in the wastewater exist in the mud cake;
step four, preparing secondary fly ash: collecting sludge and carrying out incineration treatment on the sludge so as to generate secondary fly ash;
fifthly, preparing the polysilicate metal coagulant for the second time: taking the secondary fly ash as a filler, preparing the polysilicate metal coagulant again according to the preparation process of the polysilicate metal coagulant in the second step, applying the polysilicate metal coagulant to treatment of wastewater, burning the generated sludge to generate tertiary fly ash, and using the tertiary fly ash to prepare the polysilicate metal coagulant;
sixthly, circulating the processes of preparing the polysilicate metal coagulant, treating wastewater and burning the generated sludge to obtain fly ash, wherein the fly ash is used for preparing the polysilicate metal coagulant until the metal content in the fly ash exceeds 60 percent after N times of circulation, and then performing metal recovery treatment;
and seventhly, recovering the heavy metal.
3. The method for recycling polysilicic acid metal salt and fly ash according to claim 1 or 2, wherein the polysilicic acid metal salt coagulant is a solid coagulant.
4. The implementation method of resource utilization of polysilicic acid metal salt and fly ash according to claim 1 or 2, characterized in that in the second step, ferric chloride is added in step 2) to prepare solid polysilicic acid aluminum iron coagulant.
5. The method for implementing resource utilization of metal polysilicate and fly ash according to claim 1 or 2, wherein in the second step, fillers of diatomite and white carbon black are added in step 3) to prevent further polymerization of polysilicic acid.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091393A (en) * | 1994-01-13 | 1994-08-31 | 沈阳化工学院 | Method with Water Quenching Slag or flying dust production silicic acid based flocculating agent |
| CN1594082A (en) * | 2004-07-14 | 2005-03-16 | 华北工学院分院 | Special synthesis process of poly ferrum aluminium silicate |
| CN101659463A (en) * | 2009-09-10 | 2010-03-03 | 重庆大学 | Method for treatment of industrial phosphorus-containing wastewater |
| CN103408117A (en) * | 2013-07-26 | 2013-11-27 | 白妮 | Simple method for producing polysilicate aluminum ferrite flocculating agent |
| CN103693710A (en) * | 2014-01-10 | 2014-04-02 | 中国科学院新疆理化技术研究所 | Preparation and oil-water separation method of humic acid modified fly ash magnetic material |
| CN104478122A (en) * | 2014-11-10 | 2015-04-01 | 北京市琉璃河水泥有限公司 | Method for solid-liquid separation of waste incineration fly ash water washing slurry |
| JP2015098432A (en) * | 2013-10-17 | 2015-05-28 | 株式会社ワールド・リンク | Solidification agent, method of treating solid heavy metal contaminated material and cement solidified material obtained by the method |
| CN108083345A (en) * | 2017-12-14 | 2018-05-29 | 中山大学 | A kind of method that polymeric aluminum sulfate silicate iron composite flocculation agent is prepared using red mud waste material |
-
2018
- 2018-06-15 CN CN201810623448.7A patent/CN108706707B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1091393A (en) * | 1994-01-13 | 1994-08-31 | 沈阳化工学院 | Method with Water Quenching Slag or flying dust production silicic acid based flocculating agent |
| CN1594082A (en) * | 2004-07-14 | 2005-03-16 | 华北工学院分院 | Special synthesis process of poly ferrum aluminium silicate |
| CN101659463A (en) * | 2009-09-10 | 2010-03-03 | 重庆大学 | Method for treatment of industrial phosphorus-containing wastewater |
| CN103408117A (en) * | 2013-07-26 | 2013-11-27 | 白妮 | Simple method for producing polysilicate aluminum ferrite flocculating agent |
| JP2015098432A (en) * | 2013-10-17 | 2015-05-28 | 株式会社ワールド・リンク | Solidification agent, method of treating solid heavy metal contaminated material and cement solidified material obtained by the method |
| CN103693710A (en) * | 2014-01-10 | 2014-04-02 | 中国科学院新疆理化技术研究所 | Preparation and oil-water separation method of humic acid modified fly ash magnetic material |
| CN104478122A (en) * | 2014-11-10 | 2015-04-01 | 北京市琉璃河水泥有限公司 | Method for solid-liquid separation of waste incineration fly ash water washing slurry |
| CN108083345A (en) * | 2017-12-14 | 2018-05-29 | 中山大学 | A kind of method that polymeric aluminum sulfate silicate iron composite flocculation agent is prepared using red mud waste material |
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