A rapid detection method and post-processing method for incineration fly ash quality

Abstract

The present application provides a method for rapid detection of the quality of incineration fly ash and a post-processing method. The rapid quality detection method obtains a detection reagent by mixing hydrochloric acid, oxalic acid, sodium acetate and deionized water in a first preset ratio; mixes the waste incineration fly ash in a second preset ratio with the detection reagent to obtain a quality detection liquid; and determines the quality evaluation result of the waste incineration fly ash according to the pH value of the quality detection liquid. The present application reduces the amount of fly ash sample to 3-10g and shortens the fly ash extraction time to 5-15min. The pH value of the fly ash quality detection liquid can be quickly determined to determine the quality of the fly ash, thereby regulating the amount of chelating agent added in the fly ash stabilization production, which is conducive to reducing production costs.

Description

Technical Field

[0001] The present application relates to the field of environmental protection technology, and in particular to a rapid detection method and post-processing method for incineration fly ash quality. Background Art

[0002] As a byproduct of the incineration of domestic waste, fly ash contains a variety of heavy metals such as Zn, Pb, Cd, Ni and Cu, as well as pollutants such as dioxins. According to national standards, it needs to be stabilized and then landfilled in a landfill. Currently, the stabilization of fly ash from waste incineration is mainly achieved by stabilizing / stabilizing the heavy metals in fly ash through materials such as organic chelating agents, silicate cement and phosphates.

[0003] Leaching is a common method to study the pollution characteristics of heavy metals in fly ash and its stabilized bodies. By selecting different leaching agents, the total amount, form and leaching rules of heavy metals in different environments are simulated to evaluate the possible environmental hazards. Among them, the pH value of the fly ash leachate reflects the amount of alkaline substances in the fly ash, and the content of alkaline substances in the fly ash has a significant effect on the effectiveness of the fly ash chelating agent. In addition, the study found that the leaching results of different heavy metal chelation products are directly related to the pH of the environment in which they are located. For example, heavy metals Zn, Cu, Cd and Ni exist in the form of hydroxides or carbonates in neutral and slightly alkaline environments. When the pH of the leaching solution is greater than 8, the ion concentrations of these heavy metals gradually decrease to the lowest value; and Pb, as an amphoteric metal, will precipitate as HPbO2 in a strong alkaline environment. - Therefore, when the pH value of the solution is greater than 11, the concentration of Pb in the leachate gradually increases with the increase of pH value. It can be seen that by detecting the pH value of the fly ash leachate, the content of alkaline substances in the fly ash is indirectly measured, and the amount of fly ash chelating agent can be adjusted in real time.

[0004] The preparation of the leaching solution of fly ash and fly ash stabilization products is carried out according to the standard HJ / T300 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method", and the leaching process takes 18 to 20 hours. Due to the long pretreatment time, it is impossible to meet the requirements of rapid detection of the pH value of the leaching solution of each batch of fly ash and its stabilized body, and it is impossible to meet the real-time control and guidance of the chelating agent dosage at the fly ash stabilization production site, which is not conducive to reducing the fly ash stabilization cost under the premise of ensuring that the fly ash stabilized body is fully qualified. Summary of the invention

[0005] In view of the above problems, the present application is proposed to provide a method for quickly detecting the quality of incineration fly ash and a post-processing method that overcomes the above problems or at least partially solves the above problems, comprising:

[0006] A method for quickly detecting the quality of incineration fly ash, the method comprising:

[0007] S1. Mix hydrochloric acid, oxalic acid, sodium acetate and deionized water according to a first preset ratio to obtain a detection reagent;

[0008] S2, mixing the waste incineration fly ash in a second preset ratio with the detection reagent to obtain a quality detection solution;

[0009] S3. Determine the quality evaluation result of the waste incineration fly ash according to the pH value of the quality testing liquid.

[0010] Furthermore, the step of mixing hydrochloric acid, oxalic acid, sodium acetate and water according to a first preset ratio to obtain a detection reagent comprises:

[0011] The mixed solution of the hydrochloric acid, the oxalic acid and the sodium acetate is mixed with the deionized water at a mass ratio of 30-35:500 to obtain a detection reagent.

[0012] Furthermore, the step of mixing the waste incineration fly ash of the second preset ratio with the detection reagent to obtain the quality detection liquid comprises:

[0013] The waste incineration fly ash and the detection reagent in a second preset ratio are homogenized for a specified time to obtain the quality detection solution.

[0014] Furthermore, the step of homogenizing the waste incineration fly ash and the detection reagent in a second preset ratio for a specified time to obtain the quality detection solution includes:

[0015] 3-10 g of the waste incineration fly ash and 35-45 mL of the detection reagent are homogenized for a specified time to obtain the quality detection solution.

[0016] Furthermore, the specified time is 5-15 minutes.

[0017] Furthermore, the method further comprises:

[0018] S4. When it is detected that the pH value of the quality testing liquid does not reach the preset quality evaluation level, S2 and S3 are repeated until the test result reaches the preset quality evaluation level.

[0019] Furthermore, the concentrations of the hydrochloric acid, the oxalic acid and the sodium acetate are 1.0%-5.5%, 0.04%-0.4% and 0.02%-0.4% respectively.

[0020] The present application also provides a post-processing method for incineration fly ash, which is used to process the above-mentioned waste incineration fly ash, comprising the steps of:

[0021] The dosage of the chelating agent is calculated by the pH value of the quality testing liquid;

[0022] The chelating agent in the dosage is added to the waste incineration fly ash to obtain a fly ash stabilizer.

[0023] Furthermore, the step of converting the dosage of the chelating agent according to the pH value of the quality testing liquid comprises:

[0024] When the pH value of the quality testing liquid is less than 6.5, the dosage of the chelating agent is 3-5% of the mass of the waste incineration fly ash;

[0025] or,

[0026] When the pH value of the quality testing solution is between 6.5 and 10.5, the dosage of the chelating agent is 1-2% of the mass of the waste incineration fly ash;

[0027] or,

[0028] When the pH value of the quality testing solution is greater than 10.5, the dosage of the chelating agent is 4-6% of the mass of the waste incineration fly ash.

[0029] Furthermore, the chelating agent is a sodium thiamethoxam chelating agent or a piperazine chelating agent.

[0030] This application has the following advantages:

[0031] In an embodiment of the present application, a detection reagent is obtained by mixing hydrochloric acid, oxalic acid, sodium acetate and deionized water in a first preset ratio; a second preset ratio of waste incineration fly ash is mixed with the detection reagent to obtain a quality detection liquid; and the quality evaluation result of the waste incineration fly ash is determined according to the pH value of the quality detection liquid. The present application reduces the amount of fly ash sample to 3-10g, and shortens the fly ash extraction time to 5-15min. The pH value of the fly ash quality detection liquid can be quickly determined to determine the quality of the fly ash, and then the amount of chelating agent added in the fly ash stabilization production is regulated, which is conducive to reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 This is a flowchart of a method for rapid detection of incineration fly ash quality provided by an embodiment of the present application;

[0034] Figure 2This is another step flow chart of a method for rapid detection of incineration fly ash quality provided by one embodiment of the present application;

[0035] Figure 3 This is a flow chart of the steps of a post-treatment method for incineration fly ash provided in one embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0037] Reference Figure 1-2 , shows a method for rapid detection of incineration fly ash quality provided by an embodiment of the present application,

[0038] The method comprises:

[0039] S1. Mix hydrochloric acid, oxalic acid, sodium acetate and deionized water according to a first preset ratio to obtain a detection reagent;

[0040] S2, mixing the waste incineration fly ash in a second preset ratio with the detection reagent to obtain a quality detection solution;

[0041] S3. Determine the quality evaluation result of the waste incineration fly ash according to the pH value of the quality testing liquid.

[0042] In an embodiment of the present application, a detection reagent is obtained by mixing hydrochloric acid, oxalic acid, sodium acetate and deionized water in a first preset ratio; a second preset ratio of waste incineration fly ash is mixed with the detection reagent to obtain a quality detection liquid; and the quality evaluation result of the waste incineration fly ash is determined according to the pH value of the quality detection liquid. The present application reduces the amount of fly ash sample to 3-10g, and shortens the fly ash extraction time to 5-15min. The pH value of the fly ash quality detection liquid can be quickly determined to determine the quality of the fly ash, and then the amount of chelating agent added in the fly ash stabilization production is regulated, which is conducive to reducing production costs.

[0043] Next, a method for rapid detection of incineration fly ash quality in this exemplary embodiment will be further described.

[0044] As described in step S1, hydrochloric acid, oxalic acid, sodium acetate and deionized water are mixed according to a first preset ratio to obtain a detection reagent.

[0045] In one embodiment of the present invention, the specific process of "mixing hydrochloric acid, oxalic acid, sodium acetate and deionized water according to a first preset ratio to obtain a detection reagent" in step S1 can be further explained in combination with the following description.

[0046] As described in the following steps, the mixed solution of the hydrochloric acid, the oxalic acid and the sodium acetate is mixed with the deionized water at a mass ratio of 30-35:500 to obtain a detection reagent.

[0047] As an example, the mass ratio of the mixed solution of hydrochloric acid, oxalic acid and sodium acetate to water is 30-35:500.

[0048] As an example, the sodium acetate is a pH adjuster, which is used to adjust the pH value of the detection reagent, and finally adjust the pH value of the detection reagent to 0.35-0.70.

[0049] In one embodiment of the present invention, the concentrations of the hydrochloric acid, the oxalic acid and the sodium acetate are 1.0%-5.5%, 0.04%-0.4% and 0.02%-0.4% respectively.

[0050] As an example, the concentration of the hydrochloric acid can be 1.0%, 2.0%, 2.5%, 3.0%, 4.0%, 5.0% and 5.5%, and the specific concentration can be selected according to actual conditions.

[0051] As an example, the concentration of oxalic acid can be 0.04%, 0.08%, 0.12%, 0.16%, 0.20%, 0.26%, 0.30%, 0.32%, 0.36% and 0.4%, and the specific concentration can be selected according to actual conditions.

[0052] As an example, the concentration of sodium acetate can be 0.02%, 0.08%, 0.14%, 0.18%, 0.24%, 0.26%, 0.30%, 0.32%, 0.36% and 0.4%, and the specific concentration can be selected according to actual conditions.

[0053] As described in step S2, the waste incineration fly ash in a second preset ratio is mixed with the detection reagent to obtain a quality detection liquid.

[0054] In one embodiment of the present invention, the specific process of "mixing the waste incineration fly ash in a second preset ratio with the detection reagent to obtain a quality detection liquid" in step S2 can be further explained in combination with the following description.

[0055] As described in the following steps, the waste incineration fly ash and the detection reagent in a second preset ratio are homogenized for a specified time to obtain the quality detection solution.

[0056] In one embodiment of the present invention, the specific process of "homogenizing the waste incineration fly ash and the detection reagent in a second preset ratio for a specified time to obtain the quality detection liquid" can be further explained in combination with the following description.

[0057] As described in the following steps, 3-10 g of the waste incineration fly ash and 35-45 mL of the detection reagent are homogenized for a specified time to obtain the quality detection solution.

[0058] As an example, take 3-10g of the fly ash solid body. The sampling amount of the fly ash solid body can be 3g, 5g, 7g, 8g and 10g, which can be selected according to actual conditions; the sampling amount of the detection reagent is 35-45mL, which can be 35mL, 38mL, 40mL, 42mL and 45mL, which can be selected according to actual conditions.

[0059] As an example, the waste incineration fly ash and the detection reagent are placed in the homogenizer to fully mix the waste incineration fly ash and the detection reagent. The rotation frequency of the homogenizer is 500-2000rpm, and the rotation frequency can be 500rpm, 800rpm, 1000rpm, 1200rpm, 1500rpm and 2000rpm, which can be selected according to actual conditions.

[0060] As an example, the specified time for mixing the waste incineration fly ash and the detection reagent in the homogenizer is 5-15 minutes. The specified time can be 5 minutes, 7 minutes, 9 minutes, 10 minutes, 12 minutes and 15 minutes, and the specific time can be selected according to actual conditions.

[0061] As described in step S3, the quality evaluation result of the waste incineration fly ash is determined according to the pH value of the quality testing liquid.

[0062] In one embodiment of the present invention, the specific process of "determining the quality evaluation result of the waste incineration fly ash according to the pH value of the quality testing liquid" in step S3 can be further explained in combination with the following description.

[0063] As an example, the pH value of the quality testing liquid is tested, and the quality evaluation result of the waste incineration fly ash is obtained according to the pH value test result.

[0064] In one embodiment of the present invention, the method further includes:

[0065] S4. When it is detected that the pH value of the quality testing liquid does not reach the preset quality evaluation level, S2 and S3 are repeated until the test result reaches the preset quality evaluation level.

[0066] As described in step S4, when it is detected that the pH value of the quality testing solution does not reach the preset quality evaluation level, steps S2 and S3 are repeated until the test result reaches the preset quality evaluation level.

[0067] In one embodiment of the present invention, the specific process of step S4 "when it is detected that the pH value of the quality test liquid does not reach the preset quality evaluation level, repeating S2 and S3 until the test result reaches the preset quality evaluation level" can be further explained in combination with the following description.

[0068] As an example, when it is detected that the pH value of the quality testing liquid does not reach the preset quality evaluation level, S2-S3 are repeated until the test result reaches the preset quality evaluation level, and the change of fly ash quality is monitored online.

[0069] Reference Figure 3 , shows a post-treatment method for incineration fly ash, the post-treatment method is used for the above-mentioned garbage incineration fly ash, comprising the steps of:

[0070] S5. Calculating the dosage of the chelating agent according to the pH value of the quality testing solution;

[0071] S6. Adding the chelating agent in the dosage amount to the waste incineration fly ash to obtain a fly ash stabilizer.

[0072] As described in step S5, the dosage of the chelating agent is calculated according to the pH value of the quality testing solution.

[0073] In one embodiment of the present invention, the specific process of "calculating the dosage of the chelating agent according to the pH value of the quality testing solution" in step S5 can be further explained in combination with the following description.

[0074] As described in the following steps, when the pH value of the quality test solution is less than 6.5, the dosage of the chelating agent is 3-5% of the fly ash stabilizer;

[0075] or,

[0076] When the pH value of the quality test liquid is between 6.5 and 10.5, the dosage of the chelating agent is 1-2% of the fly ash stabilizer;

[0077] or,

[0078] When the pH value of the quality testing liquid is greater than 10.5, the dosage of the chelating agent is 4-6% of the fly ash stabilizer.

[0079] In one embodiment of the present invention, the chelating agent is a sodium thiamethoxam chelating agent or a piperazine chelating agent.

[0080] As an example, when the pH of the fly ash test liquid is <6.5, the dosage of the sodium fumet chelating agent or the piperazine chelating agent is 3-5%; when the pH of the fly ash test liquid is between 6.5 and 10.5, the dosage of the sodium fumet chelating agent or the piperazine chelating agent is 1-2%; when the pH of the fly ash test liquid is >10.5, the dosage of the sodium fumet chelating agent or the piperazine chelating agent is 4-6%.

[0081] As described in step S6, the chelating agent in the dosage is added to the waste incineration fly ash to obtain a fly ash stabilizer.

[0082] In one embodiment of the present invention, the specific process of "adding the chelating agent in the amount added to the waste incineration fly ash to obtain a fly ash stabilizer" in step S6 can be further explained in combination with the following description.

[0083] As an example, according to the dosage of the chelating agent obtained above, the dosage of the chelating agent is added to the waste incineration fly ash to obtain a fly ash stabilizer.

[0084] Embodiment 1:

[0085] The on-site stabilization production of waste incineration fly ash at a waste incineration plant on April 18, 2022 was taken as an example.

[0086] In this embodiment, the detection steps are as follows:

[0087] (1) preparing a detection reagent, wherein the concentrations of hydrochloric acid, oxalic acid and sodium acetate contained therein are 4.05%, 0.04% and 0.02%, respectively, and the pH value of the detection reagent is 0.45;

[0088] (2) Weigh 5.0 g of waste incineration fly ash and add it to the detection reagent, the amount of the detection reagent is 35 mL;

[0089] (3) placing the mixed sample containing waste incineration fly ash and the detection reagent on a homogenizer for rapid mixing to obtain a quality detection liquid; the rotation frequency of the homogenizer is adjusted to 1500 rpm, and the specified homogenization time is 5 minutes;

[0090] (4) The pH value of the test quality test solution is 5.3;

[0091] (5) According to HJ / T 300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method", fly ash and acetic acid solution were prepared in the required proportion and placed on a flip-type oscillating device for 18±2h. The pH of the obtained leaching solution was 5.6, which was close to the pH of the quality test solution obtained by rapid detection, and basically reflected the properties of the raw ash leaching solution;

[0092] (6) According to the pH value of the quality test liquid, it is determined that a piperazine chelating agent with a concentration of 40% of 3.5% of the mass of the fly ash from the municipal solid waste incineration plant should be added during the stabilization production.

[0093] The fly ash after adding piperazine chelating agent was subjected to heavy metal leaching toxicity test according to GB16889-2008. The results are shown in Table 1.

[0094]

[0095] Table 1 Heavy metal leaching toxicity of waste incineration fly ash stabilizer (unit: mg / L)

[0096] As can be seen from Table 1, the leaching toxicity of fly ash after stabilization is lower than the standard limit, meeting the requirements for fly ash landfill. This shows that the technical method can meet the requirements of real-time regulation of chelating agent dosage at the fly ash stabilization production site.

[0097] Embodiment 2:

[0098] Take the on-site stabilization production of fly ash from a waste incineration plant as an example.

[0099] In this embodiment, the detection steps are as follows:

[0100] (1) A detection reagent is prepared, wherein the concentrations of hydrochloric acid, oxalic acid and sodium acetate contained therein are 2.05%, 0.04% and 0.02% respectively, and the pH value of the detection reagent is 0.65.

[0101] (2) Weigh 5.0 g of fly ash from the incineration of domestic waste and add it to the detection reagent, the amount of which is 45 mL;

[0102] (3) placing the mixed sample with the waste incineration and the detection reagent on a homogenizer for rapid mixing to obtain a quality detection liquid; the rotation frequency of the homogenizer is adjusted to 1500 rpm, and the specified homogenization time is 5 minutes;

[0103] (4) The pH value of the test quality test solution is 6.8;

[0104] (5) According to HJ / T 300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method", fly ash and acetic acid solution were prepared in the required proportion and placed on a flip-type oscillating device for 18±2h. The pH of the obtained leaching solution was 7.0, which was close to the pH of the quality test solution obtained by rapid detection, and basically reflected the properties of the raw ash leaching solution;

[0105] (6) According to the pH value of the quality test liquid, it is determined that a piperazine chelating agent with a concentration of 40% of 1.5% of the mass of the fly ash from the municipal solid waste incineration plant should be added during the stabilization production.

[0106] The fly ash after adding piperazine chelating agent was subjected to heavy metal leaching toxicity test according to GB16889-2008. The results are shown in Table 2.

[0107]

[0108] Table 2 Heavy metal leaching toxicity of waste incineration fly ash stabilizer (unit: mg / L)

[0109] As can be seen from Table 2, the leaching toxicity of fly ash after stabilization is lower than the standard limit, meeting the requirements for fly ash landfill. This shows that the technical method can meet the requirements of real-time regulation of chelating agent dosage at the fly ash stabilization production site.

[0110] Embodiment 3:

[0111] Take the on-site stabilization production of fly ash from a waste incineration plant as an example.

[0112] In this embodiment, the detection steps are as follows:

[0113] (1) Prepare a detection reagent, wherein the concentrations of hydrochloric acid, oxalic acid and sodium acetate contained therein are 3.00%, 0.10% and 0.02% respectively, and the pH value of the detection reagent is 0.50.

[0114] (2) Weigh 5.0 g of fly ash from the incineration of domestic waste and add it to the detection reagent, the amount of which is 35 mL;

[0115] (3) placing the mixed sample with the waste incineration and the detection reagent on a homogenizer for rapid mixing to obtain a quality detection liquid; the rotation frequency of the homogenizer is adjusted to 2000 rpm, and the specified homogenization time is 5 minutes;

[0116] (4) The pH value of the test quality test solution is 11.1;

[0117] (5) According to HJ / T 300-2007 "Solid Waste Leaching Toxicity Leaching Method Acetic Acid Buffer Solution Method", fly ash and acetic acid solution were prepared in the required proportion and placed on a flip-type oscillating device for 18±2h. The pH of the obtained leaching solution was 11.5, which was close to the pH of the quality test solution obtained by rapid detection, and basically reflected the properties of the raw ash leaching solution;

[0118] (5) According to the pH value of the quality test liquid, it is determined that a piperazine chelating agent with a concentration of 40% of 5.0% of the mass of the fly ash from the municipal solid waste incineration plant should be added during the stabilization production.

[0119] The fly ash after adding piperazine chelating agent was subjected to heavy metal leaching toxicity test according to GB16889-2008. The results are shown in Table 3.

[0120]

[0121] Table 3 Heavy metal leaching toxicity of waste incineration fly ash (unit: mg / L)

[0122] As can be seen from Table 3, the leaching toxicity of fly ash after stabilization is lower than the standard limit, meeting the requirements for fly ash landfill. This shows that the technical method can meet the requirements of real-time regulation of chelating agent dosage at the fly ash stabilization production site.

[0123] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0124] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0125] The above is a detailed introduction to a rapid detection method and post-processing method for the quality of incineration fly ash provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for rapid detection of incineration fly ash quality, characterized in that: The method comprises: S1. Mix hydrochloric acid, oxalic acid, sodium acetate and deionized water according to a first preset ratio to obtain a detection reagent; wherein the concentrations of the hydrochloric acid, the oxalic acid and the sodium acetate are 1.0%-5.5%, 0.04%-0.4% and 0.02%-0.4% respectively; S2. Homogenize 3-10 g of waste incineration fly ash and 35-45 mL of the detection reagent for 5-15 min to obtain a quality detection solution; S3. Determine the quality evaluation result of the waste incineration fly ash according to the pH value of the quality testing liquid.

2. The method for rapid detection of incineration fly ash quality according to claim 1, characterized in that: The step of mixing hydrochloric acid, oxalic acid, sodium acetate and water according to a first preset ratio to obtain a detection reagent comprises: The mixed solution of the hydrochloric acid, the oxalic acid and the sodium acetate is mixed with the deionized water at a mass ratio of 30-35:500 to obtain a detection reagent.

3. The method for rapid detection of incineration fly ash quality according to claim 1, characterized in that: The method further comprises: S4. When it is detected that the pH value of the quality testing liquid does not reach the preset quality evaluation level, S2 and S3 are repeated until the test result reaches the preset quality evaluation level.

4. A post-treatment method for incineration fly ash, the post-treatment method is used to treat the waste incineration fly ash according to any one of claims 1 to 3, characterized in that: Includes steps: The dosage of the chelating agent is calculated by the pH value of the quality testing liquid; The chelating agent in the dosage is added to the waste incineration fly ash to obtain a fly ash stabilizer.

5. The post-treatment method of incineration fly ash according to claim 4, characterized in that: The step of converting the dosage of the chelating agent according to the pH value of the quality testing liquid comprises: When the pH value of the quality testing liquid is less than 6.5, the dosage of the chelating agent is 3-5% of the mass of the waste incineration fly ash; or, When the pH value of the quality testing solution is between 6.5 and 10.5, the dosage of the chelating agent is 1-2% of the mass of the waste incineration fly ash; or, When the pH value of the quality testing solution is greater than 10.5, the dosage of the chelating agent is 4-6% of the mass of the waste incineration fly ash.

6. The post-treatment method of incineration fly ash according to claim 4, characterized in that: The chelating agent is a sodium thiamethoxam chelating agent or a piperazine chelating agent.

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