CN115638415A - Coupling treatment method for enrichment plants, municipal sludge and phosphogypsum - Google Patents
Coupling treatment method for enrichment plants, municipal sludge and phosphogypsum Download PDFInfo
- Publication number
- CN115638415A CN115638415A CN202211283252.0A CN202211283252A CN115638415A CN 115638415 A CN115638415 A CN 115638415A CN 202211283252 A CN202211283252 A CN 202211283252A CN 115638415 A CN115638415 A CN 115638415A
- Authority
- CN
- China
- Prior art keywords
- phosphogypsum
- municipal sludge
- enrichment
- sludge
- sedum alfredii
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 52
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 241000124844 Sedum alfredii Species 0.000 claims abstract description 37
- 241000196324 Embryophyta Species 0.000 claims abstract description 25
- 238000001035 drying Methods 0.000 claims abstract description 13
- 238000001354 calcination Methods 0.000 claims abstract description 5
- 229910001385 heavy metal Inorganic materials 0.000 claims description 28
- 239000011701 zinc Substances 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000002808 molecular sieve Substances 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 9
- 238000007873 sieving Methods 0.000 claims description 7
- 102000004190 Enzymes Human genes 0.000 claims description 5
- 108090000790 Enzymes Proteins 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 19
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 15
- 239000011574 phosphorus Substances 0.000 abstract description 15
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000003337 fertilizer Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 27
- 239000002956 ash Substances 0.000 description 16
- 239000007789 gas Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000009849 deactivation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- 238000009264 composting Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- -1 phosphoric acid Chemical compound 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241001165494 Rhodiola Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010344 co-firing Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of environmental engineering solid waste recycling, and particularly relates to a coupling treatment method of enrichment plants, municipal sludge and phosphogypsum; the method comprises the steps of drying and crushing the sedum alfredii, the municipal sludge and the phosphogypsum, mixing and calcining according to the mass ratio of 3; the phosphorus-rich ash can be used as fertilizer for secondary utilization after being treated; the method has the advantages of simple process, environmental protection, high efficiency and low cost, and provides a new idea for resource utilization of sludge and phosphogypsum and post-production treatment of sedum alfredii hance.
Description
Technical Field
The invention belongs to the technical field of environmental engineering solid waste recycling, and particularly relates to a coupling treatment method for enrichment plants, municipal sludge and phosphogypsum.
Background
The sludge contains rich organic matters, such as nitrogen, phosphorus and the like, and also contains minerals such as silicon, aluminum base, calcium base, iron base and the like, so that the sludge has the double characteristics of resource and pollution. The sludge treatment and disposal methods include landfill, incineration, land utilization, building material utilization and the like. The sludge incineration method can effectively reduce and treat the sludge, realizes the harmlessness of the sludge, has the advantages of high treatment speed, large treatment capacity, land saving, recyclability after incineration and the like, and is widely applied in China at present. However, the sludge has low heat value and high ash content, is difficult to be used as a single fuel, and can be generally used as a co-combustion material.
Phosphogypsum is an industrial byproduct in the wet-process phosphoric acid leaching process, and the main component of the phosphogypsum is calcium sulfate dihydrate, the internal impurity elements are numerous, and the incompletely decomposed phosphorite, residual phosphoric acid, fluoride, acid insoluble substances, organic matters and the like exist. The phosphorus content in the phosphogypsum is high, and if the phosphorus resource can be reasonably utilized, a new way for comprehensively utilizing the phosphogypsum is provided. However, phosphorus has a great influence on the physical properties of phosphogypsum, wherein the main component of soluble phosphorus, namely phosphoric acid, easily generates insoluble calcium salt with calcium ions, and the calcium salt has a barrier effect on the hydrolysis of dihydrate gypsum, thereby seriously influencing the further hydration effect of the phosphogypsum. The acidic soil environment caused by phosphoric acid has serious ecological influence on the growth of plants and microorganisms and underground water, and in addition, phosphorus-containing compounds flow into rivers and lakes along with rainwater, so that water eutrophication is caused, red tide is caused, and the ecological environment balance is damaged. However, researches show that phosphorus-containing compounds and heavy metals are easy to form stable phosphates, and the phosphorus resource of phosphogypsum is considered to be utilized to strengthen the stable solidification of the heavy metals when the southeast landscape is treated.
The soil plant enrichment technology is widely applied as a new and efficient biological enrichment way, and is a green and friendly technology for reducing environmental pollution by purifying, absorbing and fixing heavy metals in soil through enriching plants. However, the transfer and accumulation of heavy metals in the enriched plants also bring a 'stealth' hazard with different properties, and once the enriched plants are improperly disposed, a large amount of 'secondary pollution' is caused, so that the safe disposal of the enriched plants becomes a problem to be solved urgently. The traditional disposal method of the enriched plants comprises an incineration method, a gasification method, a composting method, a pyrolysis method, a compression landfill method, a liquid phase extraction method and the like. Composting and landfill techniques are not suitable for treating the enrichment plants, since this would again lead to heavy metal concentrations in the soil that are severely out of specification; incineration, hydrothermal and pyrolysis technologies can convert the enriched plants into biofuels or value added products under certain conditions during which heavy metals are separated, intercepted and immobilized, thereby greatly reducing environmental and health risks. The method for treating the enriched plants by using the incineration method has the advantages of rapidness, high efficiency, high reduction degree, capability of recovering partial heat energy and the like, but fly ash generated by incineration often contains heavy metals with higher concentration, and the leaching toxicity is often higher. Therefore, in the incineration process, the trapping of heavy metals is strengthened by using technical means, the migration and transformation of the heavy metals are researched, and the method has important significance for reducing the environmental pollution risk and promoting the high-valued application of the heavy metals.
Under the oxygen-enriched atmosphere, the adsorption effect of minerals such as silicon, aluminum and the like on heavy metals is researched, the carbon emission is favorably reduced, and under the oxygen-enriched atmosphere, the form change of the heavy metals is more active, so that favorable conditions are provided for researching the mechanism of migration and transformation. In conclusion, urban sludge and phosphogypsum are mixed during oxygen-enriched incineration of the sedum alfredii hance, coupling treatment is carried out, typical heavy metals in the sedum alfredii hance are captured by using minerals in the sedum alfredii hance, in the process, solidification of the heavy metals is enhanced through phosphorus in the phosphogypsum, the heavy metals are promoted to be more stably left in ash, and the environmental risk is reduced. Phosphorus resources in the phosphogypsum are reused from the use of the processed ash slag as a fertilizer to form a closed loop route, so that the resource utilization ways of the sludge and the phosphogypsum are widened, the problem of postpartum treatment of the sedum alfredii hance is solved, and the method is a new research idea.
Disclosure of Invention
The invention solves the technical problems in the prior art and provides a coupling treatment method for enrichment plants, municipal sludge and phosphogypsum. Based on the theory that mineral substance bases such as silicon, aluminum base, calcium base, iron base and the like have the effect of trapping and stabilizing heavy metals, urban sludge and phosphogypsum are mixed when sedum alfredii burns, typical heavy metals are trapped and adsorbed by using the mineral substances in the urban sludge and phosphogypsum, and the phosphorus is used for promoting the stable passivation of the heavy metals.
The technical scheme of the invention is as follows:
a coupling treatment method of enrichment plants, municipal sludge and phosphogypsum is characterized in that the enrichment plants, the municipal sludge and the phosphogypsum are mixed and then calcined at the temperature of 500-700 ℃; the enrichment plant is sedum alfredii hance.
Preferably, the enrichment plants, the municipal sludge and the phosphogypsum are dried and crushed, and then mixed and calcined according to the mass ratio of 3.
Preferably, the calcination reaction is carried out in an oxygen-rich atmosphere, O 2 The volume fraction is 20-40%.
Preferably, the calcination reaction time is 30 to 35min.
Preferably, the method for pretreating the sedum alfredii dunn comprises the following steps: deactivating enzyme, drying and pulverizing the Sedum alfredii Hance, and sieving with 200 mesh molecular sieve. The water-removing temperature is 100-105 ℃, the water-removing time is 0.5h, and the drying temperature is 70-75 ℃.
Preferably, the municipal sludge is pretreated, comprising the steps of: drying and crushing the municipal sludge, and sieving the urban sludge with a 200-mesh molecular sieve.
Preferably, the phosphogypsum is pretreated, comprising the following steps: drying and crushing the phosphogypsum, and sieving the phosphogypsum by a 200-mesh molecular sieve.
Preferably, the enrichment plant is zinc-rich companion mineral sedum alfredii hance, wherein the mass fraction of heavy metals is as follows: zn (19.67-29.79), cd (3.32-5.68) and Pb (0.51-1.17).
Preferably, the main chemical components and mass fractions of the municipal sludge are as follows: siO 2 2 (28.41％～35.41％)、Al 2 O 3 (4.14％～9.16％)、CaO(2.82％～3.96％)、Fe 2 O 3 (1.94％～2.27％)、MgO(0.22％～0.33％)。
Preferably, the phosphogypsum comprises the following main chemical components in percentage by mass: SO (SO) 3 (40.36％～42.13％)、CaO (29.39％～32.61％)、MgO(1.06％～3.22％)、P 2 O 5 (0.88％～1.86％)、Al 2 O 3 (0.46％～1.32％)、 Fe 2 O 3 (0.32％～1.57％)。
Compared with the prior art, the invention has the advantages that,
the method of the invention utilizes the mineral substances of the municipal sludge to collect and adsorb typical heavy metals in the sedum alfredii hance, enhances the solidification of the mineral substances such as silicon, aluminum and the like to the heavy metals through the phosphorus in the phosphogypsum, promotes the heavy metals to be more stably remained in ash slag, and reduces the environmental risk; the processed rich phosphorus ash can be used as fertilizer for secondary utilization. The whole process effectively enhances the effect of stabilizing and passivating heavy metals in the sedum alfredii hance by co-firing the sludge, the phosphogypsum and the sedum alfredii hance and controlling wastes by wastes, has the advantages of simple process, environmental protection, high efficiency and low cost, and provides a new idea for resource utilization of the sludge and the phosphogypsum and post-production treatment of the sedum alfredii hance.
Drawings
Fig. 1 is a technical route diagram of the present invention.
FIG. 2 is a comparison graph of the heavy metal Zn enrichment ratio before and after coupling treatment.
FIG. 3 is a graph comparing the enrichment ratios of P element before and after coupling treatment.
Detailed Description
Selecting zinc-rich associated minerals of sedum alfredii hance, and carrying out pretreatment: and (4) carrying out enzyme deactivation, drying and crushing treatment on the zinc-rich companion mineral Sedum alfredii Hance. The enzyme deactivation temperature is 100-105 ℃, the enzyme deactivation time is 0.5h, the drying temperature is 70-75 ℃, and the crushed mixture is sieved by a 200-mesh molecular sieve. Wherein the heavy metal mass fraction is: zn (19.67-29.79), cd (3.32-5.68) and Pb (0.51-1.17).
Pretreatment of municipal sludge: the municipal sludge is dry sludge, and the municipal sludge is dried, crushed and sieved by a 200-mesh molecular sieve. The main chemical components and mass fraction are as follows: siO 2 2 (28.41％～35.41％)、Al 2 O 3 (4.14％～9.16％)、 CaO(2.82％～3.96％)、Fe 2 O 3 (1.94％～2.27％)、MgO(0.22％～0.33％)。
Pre-treating phosphogypsum: drying and crushing the municipal sludge, and sieving the sludge with a 200-mesh molecular sieve. The paint comprises the following main chemical components in percentage by mass: SO 3 (40.36％～42.13％)、CaO(29.39％～32.61％)、MgO(1.06％～3.22％)、P 2 O 5 (0.88％～1.86％)、Al 2 O 3 (0.46％～1.32％)、Fe 2 O 3 (0.32％～1.57％)。
In examples 1 to 9, the pretreated Sedum alfredii Hance, municipal sludge and phosphogypsum were used.
Example 1:
1.5g of Sedum alfredii Hance is put into a crucible and put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 8:2, introducing into a tube furnace, keeping the temperature for 30min, and collecting ash after the reaction is finished.
Example 2:
1.5g of Sedum alfredii Hance is put into a crucible and put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 7:3, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 3:
placing 1.5g Sedum alfredii Hance in crucible, placing in tubular furnace, and burning at high temperatureThe temperature is 500-700 ℃, the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 6:4, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 4:
1.5g of sedum alfredii hance and 0.5g of municipal sludge are stirred and mixed uniformly, then placed into a crucible and put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 8:2, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 5:
1.5g of sedum alfredii hance and 0.5g of municipal sludge are stirred and mixed uniformly, then placed into a crucible and put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 7:3, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 6:
1.5g of sedum alfredii hance and 0.5g of municipal sludge are stirred, mixed uniformly and placed in a crucible to be put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 6:4, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 7:
1.5g of sedum alfredii hance, 0.5g of municipal sludge and 0.5g of phosphogypsum are stirred, mixed uniformly and placed in a crucible to be put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 8:2, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 8:
1.5g of sedum alfredii hance, 0.5g of municipal sludge and 0.5g of phosphogypsum are stirred, mixed uniformly and placed in a crucible to be put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 7:3, introducing into a tube furnace, keeping the temperature for 30min, and after the reaction is finished, collectingCollecting ash.
Example 9:
1.5g of sedum alfredii hance, 0.5g of municipal sludge and 0.5g of phosphogypsum are stirred, mixed uniformly and placed in a crucible to be put into a tubular furnace for combustion, the combustion temperature is 500-700 ℃, and the combustion atmosphere is N 2 And O 2 Mixing in a gas mixing bottle according to the volume ratio of 6:4, introducing into a tubular furnace, preserving the temperature for 30min, and collecting ash after the reaction is finished.
Example 10:
comparative examples 1 to 9 in the case of the enrichment ratio of heavy metal Zn, the content of Sedum alfredii burnt alone was 20% O as shown in FIG. 2 2 Under the atmosphere, the enrichment ratio of Zn is reduced from 90.28% to 50.36% as volatile heavy metal, probably because ZnCl is promoted by high temperature 2 The atmospheric mobility of Zn in the atmosphere is increased, and the enrichment rate of Zn is reduced along with the increase of the oxygen concentration. This corresponds to the conclusion that the Zn release rates in the study all increase with increasing combustion temperature and with increasing oxygen content. When the sedum alfredii and sludge are burnt together, the Zn enrichment rate is obviously higher than that when the sedum alfredii is burnt alone, and the relation with the oxygen concentration is not great; when the incineration temperature is 500 ℃, the enrichment ratio is increased by 0.74-11.51%, the enrichment ratio is increased along with the increase of the temperature, and when the incineration temperature is 700 ℃, the enrichment ratio is increased by 30.71-42.87%. When the sedum alfredii hance, the phosphogypsum and the sludge are co-fired, the Zn release rate is slightly higher than that of the sedum alfredii hance and the sludge, the Zn release rate is improved by 2.49 to 3.99 percent when the firing temperature is 500 ℃ and is improved by 4.51 to 12.15 percent when the firing temperature is 700 ℃.
Example 11:
in comparison with the enrichment ratios of the P elements in examples 1 to 9, as shown in FIG. 3, when the Sedum alfredii Hance and sludge were burnt together, the P release rate was significantly higher than that when the Sedum alfredii Hance was burnt alone. At 600 ℃ and 700 ℃, the oxygen concentration increases; the concentration rate is increased by about 21% when the incineration temperature is 500 ℃, the concentration rate is increased along with the increase of the temperature, and the concentration rate is increased by about 38% when the incineration temperature is 700 ℃. When the rhodiola east-south China, the phosphogypsum and the sludge are mixed and burnt, the P release rate is continuously increased, the P release rate is increased by 29.95 to 51.72 percent at the burning temperature of 500 ℃, and the P release rate is increased by 46.84 to 68.19 percent at the burning temperature of 700 ℃.
The ash of examples 1 to 9 is phosphorus rich ash and can be used as a fertilizer.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all equivalent substitutions or substitutions made on the above-mentioned embodiments are included in the scope of the present invention.
Claims (8)
1. A coupling treatment method of enrichment plants, municipal sludge and phosphogypsum is characterized in that the enrichment plants, the municipal sludge and the phosphogypsum are mixed and then calcined at the temperature of 500-700 ℃; the enrichment plant is sedum alfredii hance.
2. The method according to claim 1, wherein the enrichment plant, the municipal sludge and the phosphogypsum are dried and crushed, and then mixed and calcined according to the mass ratio of 3.
3. The method of claim 1, wherein the calcination reaction is conducted in an oxygen-rich atmosphere, O 2 The volume fraction is 20-40%.
4. The method of claim 1, wherein the calcination reaction time is 30 to 35min.
5. The method according to claim 2, characterized in that the specific methods for drying and crushing the enrichment plants, the municipal sludge and the phosphogypsum are respectively as follows:
deactivating enzyme, drying and pulverizing the Sedum alfredii Hance, and sieving with 200 mesh molecular sieve. The water-removing temperature is 100-105 ℃, the water-removing time is 0.5h, and the drying temperature is 70-75 ℃;
drying and crushing municipal sludge, and sieving with a 200-mesh molecular sieve;
drying and crushing the phosphogypsum, and sieving the phosphogypsum by a 200-mesh molecular sieve.
6. The method as claimed in claim 2, wherein the enrichment plant is zinc-rich companion mineral sedum alfredii hance, and the heavy metal content of the dried plant is as follows by mass fraction:
Zn 19.67‰～29.79‰
Cd 3.32‰～5.68‰
Pb 0.51‰～1.17‰。
7. the method of claim 2, wherein the municipal sludge, after being dried, comprises the following chemical components in percentage by mass:
8. the method of claim 2, in which the phosphogypsum, after being dried, comprises the following chemical components in percentage by mass:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211283252.0A CN115638415A (en) | 2022-10-20 | 2022-10-20 | Coupling treatment method for enrichment plants, municipal sludge and phosphogypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211283252.0A CN115638415A (en) | 2022-10-20 | 2022-10-20 | Coupling treatment method for enrichment plants, municipal sludge and phosphogypsum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115638415A true CN115638415A (en) | 2023-01-24 |
Family
ID=84945116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211283252.0A Pending CN115638415A (en) | 2022-10-20 | 2022-10-20 | Coupling treatment method for enrichment plants, municipal sludge and phosphogypsum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115638415A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116267511A (en) * | 2023-02-23 | 2023-06-23 | 昆明理工大学 | Device and method for preparing nutrient soil by calcining high-calcium magnesium phosphorus-based solid waste coupled biomass |
-
2022
- 2022-10-20 CN CN202211283252.0A patent/CN115638415A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116267511A (en) * | 2023-02-23 | 2023-06-23 | 昆明理工大学 | Device and method for preparing nutrient soil by calcining high-calcium magnesium phosphorus-based solid waste coupled biomass |
| CN116267511B (en) * | 2023-02-23 | 2024-05-10 | 昆明理工大学 | Device and method for preparing nutrient soil by calcining high-calcium magnesium phosphorus-based solid waste coupled biomass |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101486563B (en) | Biological haydite burned from mine tailings, and preparation and use method thereof | |
| CN101531500A (en) | Method of baking ceramsite by using sludge | |
| CN113751476B (en) | Method for cooperative treatment and cyclic utilization of metallurgical solid waste and municipal waste incineration fly ash | |
| CN115638415A (en) | Coupling treatment method for enrichment plants, municipal sludge and phosphogypsum | |
| CN102718378A (en) | Method of cement kiln co-processing for calcium-added and passivated town sludge | |
| Zheng et al. | CaO-assisted hydrothermal treatment combined with incineration of sewage sludge: Focusing on phosphorus (P) fractions, P-bioavailability, and heavy metals behaviors | |
| CN113651588B (en) | Efficient phosphorus-removing baking-free ceramsite and preparation method and application thereof | |
| CN106995306B (en) | Method for firing ceramsite by using activated sludge | |
| CN105417784A (en) | Method for curing solidification treatment of heavy metal-containing sour water | |
| CN101481221B (en) | Method for treating silicate slag from wastewater treatment | |
| CN110575812B (en) | Environment-friendly adsorbing material for efficient phosphorus removal of argil/pyrolusite and preparation method thereof | |
| CN107384417B (en) | A kind of phosphorus slag base repair materials containing lead-contaminated soil | |
| CN102174070A (en) | Method for preparing composite foam concrete foaming agent and soil modifying agent by extracting microprotein from sludge through utilizing red mud | |
| CN114605163A (en) | Ceramic particle based on sludge incineration ash and preparation method and application thereof | |
| CN108609980A (en) | A method of lime-ash is discarded by silt soft foundation deep cure using desulphurization denitration | |
| CN112547792A (en) | Water locking agent for petroleum-polluted soil remediation and application thereof | |
| CN113501735A (en) | Preparation method of electrolytic manganese slag-based slow release fertilizer | |
| CN101643307B (en) | Method for utilizing fume afterheat of cement plant to heat-dry sludge and prepare cement by firing sludge | |
| CN112934906A (en) | Method for innocent treatment of phosphorus tailings and phosphogypsum by burning raw materials | |
| CN118389157B (en) | Method for preparing heavy metal contaminated soil restoration agent by utilizing red mud and product thereof | |
| CN115646444B (en) | Sewage dephosphorization material and preparation method thereof | |
| CN113880378A (en) | Method for removing heavy metals in municipal sludge and recovering phosphorus by using additive | |
| CN101734835B (en) | Treatment agent for curing oilfield oily sludge and treatment method for converting oilfield oil sludge or sand into organic mud or sand | |
| Tang et al. | Opportunities, challenges and modification methods of coal gangue as a sustainable soil conditioner—a review | |
| Chandel et al. | Comprehensive review on fly ash: Turning waste into a valuable resource for sustainable development |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |