CN114888056B - Method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash - Google Patents
Method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash Download PDFInfo
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- CN114888056B CN114888056B CN202210379689.8A CN202210379689A CN114888056B CN 114888056 B CN114888056 B CN 114888056B CN 202210379689 A CN202210379689 A CN 202210379689A CN 114888056 B CN114888056 B CN 114888056B
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- carbon dioxide
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- incineration fly
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 239000010881 fly ash Substances 0.000 title claims abstract description 87
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 60
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 60
- 238000004056 waste incineration Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000000382 dechlorinating effect Effects 0.000 title claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 91
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims description 20
- 238000000926 separation method Methods 0.000 claims description 14
- 239000007787 solid Substances 0.000 claims description 12
- 239000004575 stone Substances 0.000 claims description 8
- 238000005119 centrifugation Methods 0.000 claims description 2
- 238000006298 dechlorination reaction Methods 0.000 abstract description 12
- 239000002893 slag Substances 0.000 description 24
- 239000007789 gas Substances 0.000 description 18
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 11
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 10
- 229910052801 chlorine Inorganic materials 0.000 description 10
- 239000000460 chlorine Substances 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 239000000706 filtrate Substances 0.000 description 8
- 150000003841 chloride salts Chemical class 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 5
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010813 municipal solid waste Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000001089 mineralizing effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash, which is characterized in that the waste incineration fly ash is subjected to three-stage countercurrent water washing, carbon dioxide-containing gas is introduced into slurry formed by the waste incineration fly ash and water for reaction in the first-stage countercurrent water washing and the second-stage countercurrent water washing processes, and the method is characterized in that the carbonation of the waste incineration fly ash is coupled with the countercurrent water washing and dechlorination process, so that the dechlorination rate of the waste incineration fly ash is improved under the condition of lower solid-liquid ratio compared with the conventional fly ash water washing and dechlorination, and the carbon dioxide can be effectively and synchronously solidified.
Description
Technical Field
The invention relates to a water washing treatment method of waste incineration fly ash, in particular to a method for synchronously solidifying carbon dioxide and deeply dechlorinating the waste incineration fly ash, belonging to the field of recycling treatment of fly ash solid wastes.
Background
Domestic garbage treatment enters a stage mainly including incineration and is in an industry mature stage. In the process of garbage incineration, organic matters are converted into gas and discharged into the atmosphere, the inorganic matters form solid particles, the finer particles are discharged into the next system along with the flue gas from the incinerator, and finally, the particles and the added purifying agent and reaction products form the garbage incineration fly ash.
The amount of fly ash produced by waste incineration in China is large every year, the content of CaO in the fly ash is high, and the fly ash is easy to react with CO 2 CaCO generation 3 And (5) precipitation. The fly ash used for carbonization has great potential for sealing carbon dioxide, and the carbonized fly ash can be reused as building aggregate after carbonating.
Based on the characteristics of the waste incineration fly ash, no process can simultaneously carry out carbon fixation and deep dechlorination at present. The treatment method of the waste incineration fly ash comprises water washing, sintering, stabilization technology and the like. The water washing is an economically feasible mode, is simple to operate and low in cost, and can dissolve most of soluble chloride salt in the waste incineration fly ash. In the application of the existing waste incineration fly ash washing technology, most of the technology focuses on the technical improvement of common washing, various leaching agents are added on the basis of washing, the cost is high, the water consumption is huge, and most of the technology is difficult to be suitable for specific engineering application. The dechlorination degree of the waste incineration fly ash is not high in the current various processes, deep dechlorination cannot be performed, and the recycling utilization of the waste incineration fly ash is limited.
Disclosure of Invention
Aiming at the technical problems that the conventional water washing of the waste incineration fly ash is difficult to realize deep dechlorination and the recycling utilization of the waste incineration fly ash is limited in the prior art, the invention aims to provide a method for synchronously solidifying carbon dioxide and deep dechlorination of the waste incineration fly ash.
In order to achieve the technical aim, the invention provides a method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash, which is characterized in that waste incineration fly ash is subjected to three-stage countercurrent water washing, and carbon dioxide-containing gas is introduced into slurry formed by the waste incineration fly ash and water for reaction in the processes of the first-stage countercurrent water washing and the second-stage countercurrent water washing.
According to the technical scheme, the carbon dioxide gas is skillfully introduced into the waste incineration fly ash, the mutual benefit relation between the carbon dioxide gas and the waste incineration fly ash in the water washing process is fully utilized, the carbon dioxide is fixed through the waste incineration fly ash, and meanwhile, the carbon dioxide is utilized to promote the dissolution of chloride salt in the waste incineration fly ash. The waste incineration fly ash has large specific surface area and high porosity, and contains the waste incineration fly ash which can be matched with CO 2 Reactive active ingredients, such as alkali metals (Ca, mg, na, K) and their oxides (CaO, mgO) etc., which are CO in the flue gas 2 Upon contact, it is converted to carbonate, thereby allowing CO to be converted into 2 Mineralizing to realize CO 2 At the same time, the carbon dioxide can promote the deep dechlorination of the waste incineration fly ash, the indissolvable chloride in the waste incineration fly ash is mainly Friedel Salt, and the following reaction occurs after the carbon dioxide is introduced: 3 CaO. Al 2 O 3 ·CaCl 2 ·10H 2 O+3CO 2 →3CaCO 3 +Al 2 O 3 ·xH 2 O+CaCl 2 +(10-x)H 2 O, thus can promote this part indissolvable chloride to turn into the soluble salt through letting in carbon dioxide, and along with letting in carbon dioxide, control the pH of the whole system from original strong basicity to weak acidity, make help promote partly indissolvable chloride's conversion and dissolution, have improved the removal rate of flying ash chloride.
As a preferable scheme, in each stage of countercurrent washing process of the three stages of countercurrent washing, the waste incineration fly ash and water form slurry according to a liquid-solid ratio of 3 mL:1-4 mL:1 g. Compared with the method without introducing carbon dioxide, the method greatly reduces the liquid-solid ratio of water washing, saves water and reduces the generation of wastewater. The washing water to be used is not particularly limited, and may be tap water, purified water of industrial wastewater, or the like.
As a preferable scheme, in the first-stage countercurrent water washing process, carbon dioxide-containing gas is introduced into the slurry at a flow rate of 100-200L/min per kilogram of waste incineration fly ash.
As a preferable scheme, in the first-stage countercurrent water washing process, the pH of the slurry is controlled within the range of 6.0-6.5.
As a preferable scheme, in the second-stage countercurrent water washing process, carbon dioxide-containing gas is introduced into the slurry at a flow rate of 60-100L/min per kilogram of waste incineration fly ash.
As a preferable scheme, in the second stage countercurrent water washing process, the pH of the slurry is controlled to be in the range of 5.5-6.0.
In the invention, in the first-stage countercurrent washing and the second-stage countercurrent washing, the introduction of the carbon dioxide gas can promote the dissolution of part of indissolvable chloride salt, and meanwhile, the slightly acidic carbon dioxide continuously consumes alkaline substances, so that the pH value of the alkaline substances is reduced, the conversion and the dissolution of part of indissolvable chloride salt are promoted, and the removal rate of fly ash chloride salt is further improved. CO is introduced in the first-stage countercurrent water washing process 2 The flow is larger than that of the second stage countercurrent washing process, and is mainly based on that the chlorine content of the waste incineration fly ash in the first stage countercurrent washing process is relatively higher, and carbon dioxide with larger flow velocity is needed for the waste incineration fly ashThe reaction is realized, the chlorine content in the waste incineration fly ash in the second-stage countercurrent water washing process is relatively reduced, the required carbon dioxide flow is relatively smaller, but the carbon dioxide inflow flow is kept within a certain range, and the deep removal of chlorine can be ensured.
As a preferable scheme, the carbon dioxide in the carbon dioxide-containing gas is 5-30% by volume. The carbon dioxide-containing gas has wide sources and can be industrial flue gas. In particular to steel industry flue gas, waste incineration flue gas, power plant flue gas and the like.
As a preferred embodiment, the carbon dioxide-containing gas is bubbled uniformly through the slurry using a bubbler stone. Carbon dioxide can be stably dispersed into water by adopting the bubble stone, so that the contact reaction efficiency of the carbon dioxide and the waste incineration fly ash is increased.
As a preferable scheme, the conditions of each stage of countercurrent water washing in the three-stage countercurrent water washing process are as follows: the temperature is 40-60 ℃, the time is 40-60 min, and the stirring speed is 500-800 r/min. Under the preferable temperature condition, the waste incineration fly ash can reach the maximum dechlorination efficiency, if the temperature is too low, the deep dechlorination effect can not be achieved, and if the water washing pretreatment is carried out at too high temperature, the energy loss is increased, the treatment cost is increased, and the CO is treated at high temperature 2 The solubility of (c) is also lowered, which is disadvantageous for carbon fixation, and if the temperature is too low, the reaction efficiency is lowered. And proper stirring effect is beneficial to improving the gas-liquid-solid three-phase contact reaction efficiency.
As a preferred embodiment, the third stage countercurrent water wash employs a conventional water wash process.
As a preferable scheme, after the three-stage countercurrent water washing is finished, the solid-liquid separation is realized through centrifugation, and the solid water content is lower than 35%. By dehydrating the solid to a low water content, the residual amount of chlorine can be reduced.
Compared with the prior art, the technical scheme of the invention has the beneficial technical effects that:
(1) The method for synchronously solidifying the carbon dioxide and deeply dechlorinating the fly ash saves water consumption, the solid-liquid ratio is only 3:1-4:1, and water is recycled through a three-stage countercurrent process.
(2) The method for synchronously solidifying the carbon dioxide and deeply dechlorinating the fly ash can realize carbon dioxide fixation by utilizing the waste incineration fly ash and promote deep dechlorination of the waste incineration fly ash by utilizing the carbon dioxide. The waste incineration fly ash has large specific surface area, high porosity, and is rich in active substances such as CaO and the like which can react with carbon dioxide and CO 2 CaCO generation 3 The sediment, the carbon dioxide is sealed by utilizing the waste incineration fly ash, and the carbonized fly ash can be reused as building aggregate, thereby realizing the recycling. Meanwhile, insoluble chloride in the waste incineration fly ash is mainly Friedel Salt, XRD is used for detecting the water-washed fly ash before and after carbonation, and the Friedel Salt peak of the insoluble Salt in the fly ash after the flue gas is introduced is found to disappear, which is mainly because the following reaction occurs after the carbon dioxide is introduced: 3 CaO. Al 2 O 3 ·CaCl 2· 10H 2 O+3CO 2 →3CaCO 3 +Al 2 O 3 ·xH 2 O+CaCl 2 +(10-x)H 2 O. The pH of the whole system is controlled from original strong alkalinity to weak acidity, so that the conversion and dissolution of partial indissolvable chloride are directly promoted, and the removal rate of the fly ash chloride is further improved.
(3) The method for synchronously solidifying carbon dioxide and deeply dechlorinating the fly ash can also fix heavy metals in the fly ash, the heavy metals in the solution exist in an unstable hydroxide form under alkaline conditions, and CO is introduced 2 Then reacts with the water to form insoluble carbonate.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a flow chart of a method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash.
Fig. 2 is an XRD comparison chart of the waste incineration fly ash after carbonating water washing and ordinary water washing.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The original chloride ion content of the incineration fly ash is 20.75%, and the introduced carbon dioxide is derived from the flue gas and the volume content of the incineration fly ash is 13%. Adding fly ash into a water washing reactor, controlling the liquid-solid ratio to be 3:1, introducing carbon dioxide-containing gas at the flow rate of 100L/min per kilogram of fly ash, and dispersing the fly ash by using bubble stone. The mixture was stirred at 500r/min for 1 hour by using an electric stirrer, and the stirring temperature was controlled to 40℃and the pH was controlled to 6.5, whereby the first washing step was carried out. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. The water washing slag enters a second-stage water washing process, the flow rate of the gas containing carbon dioxide is 60L/min per kilogram of fly ash, and the gas is dispersed by using the bubble stone. Stirring was carried out at 500r/min for 1h using an electric stirrer, the stirring temperature was controlled at 40℃and the pH was 6.0. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. The water washing slag is subjected to a third water washing process, and is stirred for 1h at a speed of 500r/min by using an electric stirrer, and the stirring temperature is controlled to be 40 ℃. The first-stage washing liquid is derived from the second-stage washing filtrate, the second-stage washing liquid is derived from the third-stage washing filtrate, the third-stage washing liquid is additionally added tap water, and the solid-liquid separation of each stage ensures that the water in the washing slag is removed to below 35%. The chlorine content of the final washing slag is detected to be 0.86 percent, and the requirements of HJ-1134-2020, 6.3-c, are met: the soluble chlorine content of the treated product should not exceed 2%, preferably not more than 1%.
Example 2
The original chloride ion content of the incineration fly ash is 19.25%, and the introduced carbon dioxide is derived from the flue gas and the volume content of the incineration fly ash is 30%. Fly ash was placed in the reactor. Controlling the liquid-solid ratio to be 4:1, introducing the gas containing carbon dioxide at the flow rate of 200L/min per kilogram of fly ash, and dispersing the fly ash by using the bubble stone. The mixture was stirred at 800r/min for 1 hour by using an electric stirrer, and the stirring temperature was controlled to 60℃and the pH was controlled to 6.0, whereby the first washing step was carried out. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. The water washing slag enters a second-stage water washing process, the flow rate of the gas containing carbon dioxide is 100L/min per kilogram of fly ash, and the gas is dispersed by using the bubble stone. Stirring was carried out at 800r/min for 1h using an electric stirrer, the stirring temperature was controlled at 60℃and the pH was 5.5. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. And (3) performing a third-stage water washing process on the water washing slag, and stirring for 1h at a speed of 800r/min by using an electric stirrer, wherein the stirring temperature is controlled to be 60 ℃. The first-stage washing liquid is derived from the second-stage washing filtrate, the second-stage washing liquid is derived from the third-stage washing filtrate, the third-stage washing liquid is additionally added tap water, and the solid-liquid separation of each stage ensures that the water in the washing slag is removed to below 35%. The chlorine content of the final washing slag is detected to be 0.70 percent, and the requirements of HJ-1134-2020, 6.3-c, are met: the soluble chlorine content of the treated product should not exceed 2%, preferably not more than 1%.
Comparative example 1
The incineration fly ash used had an original chloride ion content of 20.75%, and the fly ash was placed in a reactor. Controlling the liquid-solid ratio to be 3:1, stirring for 1h at the speed of 500r/min by using an electric stirrer, controlling the stirring temperature to be 40 ℃, and performing a first-stage water washing flow. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. The water washing slag enters a second-stage water washing flow, and is stirred for 1h at the speed of 500r/min by using an electric stirrer, and the stirring temperature is controlled to be 40 ℃. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. The water washing slag is subjected to a third water washing process, and is stirred for 1h at a speed of 500r/min by using an electric stirrer, and the stirring temperature is controlled to be 40 ℃. The first-stage washing liquid is derived from the second-stage washing filtrate, the second-stage washing liquid is derived from the third-stage washing filtrate, the third-stage washing liquid is additionally added tap water, and the solid-liquid separation of each stage ensures that the water in the washing slag is removed to below 35%. The chlorine content of the final water washing slag is detected to be 2.85%.
Comparative example 2
The incineration fly ash used had an original chloride ion content of 19.25%, and the fly ash was placed in a reactor. The liquid-solid ratio was controlled to be 4:1, stirred with an electric stirrer at 800r/min for 1 hour, the stirring temperature was controlled to be 60 ℃, the first-stage water washing process was performed, the flow rate of the carbon dioxide-containing gas was 200L/min per kg of fly ash, and the carbon dioxide-containing gas was dispersed with a bubbly stone. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. The water washing slag enters a second-stage water washing flow, and is stirred for 1h at the speed of 800r/min by using an electric stirrer, and the stirring temperature is controlled to be 60 ℃. And (3) after solid-liquid separation, obtaining water washing liquid and water washing slag. And (3) performing a third-stage water washing process on the water washing slag, and stirring for 1h at a speed of 800r/min by using an electric stirrer, wherein the stirring temperature is controlled to be 60 ℃. The first-stage washing liquid is derived from the second-stage washing filtrate, the second-stage washing liquid is derived from the third-stage washing filtrate, the third-stage washing liquid is additionally added tap water, and the solid-liquid separation of each stage ensures that the water in the washing slag is removed to below 35%. The chlorine content of the final water washing slag is detected to be 1.64%.
Claims (5)
1. A method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash is characterized in that the waste incineration fly ash is subjected to three-stage countercurrent water washing, and the method is characterized in that: in the first-stage countercurrent washing and the second-stage countercurrent washing, introducing carbon dioxide-containing gas into slurry formed by the waste incineration fly ash and water for reaction;
in the first-stage countercurrent water washing process, the pH of the slurry is controlled within the range of 6.0-6.5;
in the first-stage countercurrent washing process, introducing carbon dioxide-containing gas into the slurry at a flow rate of 100-200L/min per kilogram of waste incineration fly ash;
in the second-stage countercurrent water washing process, the pH of the slurry is controlled within the range of 5.5-6.0;
in the second-stage countercurrent water washing process, introducing carbon dioxide-containing gas into the slurry at a flow rate of 60-100L/min per kilogram of waste incineration fly ash;
the conditions of each stage of countercurrent washing in the three-stage countercurrent washing process are as follows: the temperature is 40-60 ℃, the time is 40-60 min, and the stirring speed is 500-800 r/min.
2. The method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash according to claim 1, which is characterized in that: in the three-stage countercurrent washing process, waste incineration fly ash and water form slurry according to the liquid-solid ratio of 3 mL:1-4 mL:1 g.
3. The method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash according to claim 1, which is characterized in that: the carbon dioxide in the carbon dioxide-containing gas is 5-30% by volume.
4. The method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash according to claim 1, which is characterized in that: and the carbon dioxide-containing gas is uniformly bubbled by using a bubble stone in the slurry feeding process.
5. The method for synchronously solidifying carbon dioxide and deeply dechlorinating waste incineration fly ash according to claim 1, which is characterized in that: and after the three-stage countercurrent water washing is finished, solid-liquid separation is realized through centrifugation, and the solid water content is lower than 35%.
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| CN115532785A (en) * | 2022-09-13 | 2022-12-30 | 浙江大学 | Disposal system and method for thermal decomposition and collaborative mineralization of fly ash dioxin |
| CN115475821A (en) * | 2022-09-23 | 2022-12-16 | 重庆三峰环境集团股份有限公司 | Method for curing heavy metal in cooperation with flue gas purification by waste incineration fly ash |
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