Waste incineration fly ash disposal and utilization system

Abstract

The utility model relates to a waste incineration fly ash treatment and utilization system which comprises a fly ash curing system, a geopolymer curing agent preparation system and a geopolymer soil preparation system. Wherein the fly ash curing system is used for curing fly ash to obtain a geopolymer cured body; the geopolymerization curing agent preparation system comprises a crushing device and a screening device and can be used for preparing a geopolymerization curing agent from a geopolymerization curing body; the geopolymer soil preparation system can further prepare the geopolymer curing agent into geopolymer soil. According to the waste incineration fly ash treatment and utilization system provided by the invention, all pollution components such as heavy metal, dioxin and soluble chlorine in the waste incineration fly ash are effectively solidified and removed, and the prepared geopolymer soil can be used as a sealing material of a waste landfill site; meanwhile, the waste incineration fly ash can be used for manufacturing facilities such as road beds, protective materials, vegetation restoration materials, pit backfilling and ecological restoration materials and seabed foundation components, and harmless treatment and resource utilization of the waste incineration fly ash are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of harmless disposal of waste incineration fly ash, and in particular to a waste incineration fly ash disposal and utilization system. Background Art

[0002] Waste incineration fly ash is a product of the waste incineration process, which aims to achieve harmless treatment of domestic waste. Fly ash from waste incineration is enriched with a large amount of heavy metals such as lead, mercury, chromium, highly carcinogenic dioxins and chloride salts and other pollutants. Harmful substances are easily dissolved and cause harm to the surrounding environment. It has now been listed in my country's "National List of Hazardous Wastes" (2021 edition) as hazardous waste (category HW18).

[0003] There are two main ways to harmlessly dispose of fly ash from garbage incineration: cement kiln co-disposal and landfill disposal. Among them, cement kiln co-disposal is carried out in accordance with the exemption conditions for hazardous waste disposal, but the disposal process requires high temperature conditions and has high economic costs; cement products do not have long-term stability, and the weathering of the natural environment continues to erode cement, and the ecological environment is still threatened by the seepage of pollutants such as heavy metals. In addition, the cement kiln co-disposal process cannot meet the needs of fly ash disposal in various regions of the country because it depends on the distribution location and number of cement kilns, making this process difficult to promote and use. Landfill treatment is to solidify the fly ash to meet the requirements of pollutant leaching, and then transport it to a domestic waste landfill for landfill, such as chelation stabilization process disposal; this harmless disposal method can only be stored as hazardous waste in designated landfills after the solidified and stabilized fly ash is treated, and cannot be used as a resource. It is not only costly, but also wastes landfill space and resources.

[0004] It can be seen that the above-mentioned process of harmlessly disposing of fly ash but not truly realizing the resource utilization of fly ash can no longer meet the disposal needs of fly ash. It is urgent to propose a new disposal and utilization system to solve the problems of harmless disposal and resource utilization of fly ash. Utility Model Content

[0005] Based on this, the present application provides a waste incineration fly ash disposal and utilization system to improve the problem that the harmless treatment measures for waste incineration fly ash in the prior art are difficult to truly achieve resource utilization.

[0006] The present application provides a waste incineration fly ash disposal and utilization system, the waste incineration fly ash disposal and utilization system comprising:

[0007] A fly ash solidification system, comprising a fly ash pretreatment device, a geopolymerization reactor and a molding and curing device, wherein the fly ash pretreatment device is used to pretreat fly ash, the discharge port of the fly ash pretreatment device is connected to the feed port of the geopolymerization reactor, the feed port of the geopolymerization reactor is also used to add a curing agent and a curing liquid, the discharge port of the geopolymerization reactor is used to discharge a geopolymer gel, the feed port of the molding and curing device is connected to the discharge port of the geopolymerization reactor, and the discharge port of the molding and curing device is used to discharge a geopolymer solidified body;

[0008] A geopolymer curing agent preparation system comprises a jaw crusher and a screening machine, wherein the feed port of the jaw crusher is connected to the discharge port of the molding and curing equipment, the discharge port of the jaw crusher is used to discharge the geopolymer curing agent, the discharge port of the jaw crusher is connected to the feed port of the screening machine, the screening machine comprises a first discharge port, and the first discharge port of the screening machine is used to discharge the geopolymer curing agent with a particle size reaching a specified size.

[0009] In one of the embodiments, the fly ash pretreatment equipment includes a water washing device and a high-temperature furnace. The feed port of the water washing device is used to add fly ash, the discharge port of the water washing device is connected to the feed port of the high-temperature furnace, and the discharge port of the high-temperature furnace is the discharge port of the fly ash pretreatment equipment.

[0010] In one embodiment, the molding and curing equipment includes an extrusion molding machine, a blank cutter and a curing chamber, the feed port of the molding and curing equipment is the feed port of the extrusion molding machine, the discharge port of the molding and curing equipment is the discharge port of the curing chamber, the discharge port of the extrusion molding machine is connected to the feed port of the curing chamber, and the blank cutter is arranged at the discharge port of the extrusion molding machine.

[0011] In one of the embodiments, the fly ash solidification system further includes a fly ash silo, and a discharge port of the fly ash silo is connected to a feed port of the water washing device.

[0012] In one of the embodiments, a spiral feeding device is provided between the discharge port of the fly ash silo and the feed port of the water washing device, and the fly ash is added from the discharge port of the fly ash silo to the feed port of the water washing device through the spiral feeding device.

[0013] In one embodiment, the geopolymer curing agent preparation system further includes a crushing device, the screening machine further includes a second discharge port, the second discharge port of the screening machine is used to discharge the geopolymer curing agent whose particle size does not reach a specified size, the feed port of the crushing device is connected to the second discharge port of the screening machine, and the discharge port of the crushing device is used to discharge the crushed geopolymer curing agent;

[0014] The waste incineration fly ash disposal and utilization system also includes a geopolymer preparation system, which includes a stirring device, an air-drying zone, a water-washing and drying device and a molding device. The discharge port of the crushing device is connected to the feed port of the stirring device, and the feed port of the stirring device is also used to add high molecular polymers, waste residues and sewage. The discharge port of the stirring device is used to discharge the slurry of geopolymer. The discharge port of the stirring device is connected to the air-drying zone, and the air-drying zone is used to air-dry the slurry of the geopolymer to obtain the dried body of the geopolymer. The feed port of the water-washing and drying device is used to add the dried body of the geopolymer, and the discharge port of the water-washing and drying device is used to discharge the slurry of the geopolymer. The discharge port of the water-washing and drying device is connected to the feed port of the molding device, and the discharge port of the molding device is used to discharge the geopolymer.

[0015] In one embodiment, the geopolymer curing agent preparation system also includes a geopolymer curing agent mixing device, the feed port of the geopolymer curing agent mixing device is connected to the first discharge port of the screening machine, the feed port of the geopolymer curing agent mixing device is also used to add leachate, garbage concentrate or water, the discharge port of the geopolymer curing agent mixing device is used to discharge liquid geopolymer curing agent, and the discharge port of the geopolymer curing agent mixing device is connected to the feed port of the stirring device.

[0016] In one of the embodiments, the geopolymer preparation system also includes an air separation device, which is arranged between the crushing device and the stirring device, and the feed port of the air separation device is connected to the discharge port of the crushing device, and the discharge port of the air separation device is connected to the feed port of the stirring device.

[0017] This application solidifies the waste incineration fly ash to form a geopolymer solidified body, and then makes the geopolymer solidified body into a geopolymer solidifying agent, which effectively solidifies and removes all pollutants in the waste incineration fly ash, including heavy metals such as Zn, Pb, Cr, Cd, Hg, As, dioxins, and soluble chlorine, which meet the national standard limit indicators. The geopolymer solidifying agent can be directly used as a landfill closure material, truly realizing the harmless treatment and resource utilization of waste incineration fly ash. The geopolymer solidifying agent is further prepared into geopolymer soil, which can also be used to make road subgrades, protective materials, vegetation restoration materials, mine backfill and ecological restoration materials, submarine foundation components and other facilities, further enriching the application scenarios of waste incineration fly ash after treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a waste incineration fly ash disposal and utilization system provided in one embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a fly ash solidification system of a waste incineration fly ash disposal and utilization system provided in one embodiment of the present application;

[0020] Figure 3 A schematic structural diagram of a geopolymeric curing agent preparation system for a waste incineration fly ash disposal and utilization system provided in one embodiment of the present application;

[0021] Figure 4 A schematic structural diagram of a geopolymeric soil preparation system for a waste incineration fly ash disposal and utilization system provided in one embodiment of the present application.

[0022] Attached Figures: 100, fly ash solidification system; 110, geopolymerization reactor; 120, water washing device; 130, high temperature furnace; 140, extrusion molding machine; 150, cutting machine; 160, curing room; 170, fly ash silo; 180, spiral feeding device; 200, geopolymerization curing agent preparation system; 210, jaw crusher; 220, screening machine; 230, crushing device; 240, geopolymerization curing agent mixing equipment; 300, geopolymer soil preparation system; 310, stirring device; 320, air drying area; 330, water washing and drying device; 340, molding device. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] The present application embodiment provides a waste incineration fly ash disposal and utilization system, the waste incineration fly ash disposal and utilization system comprising:

[0028] The fly ash solidification system 100 includes a fly ash pretreatment device, a geopolymerization reactor 110, and a molding and curing device. The fly ash pretreatment device is used to pretreat fly ash. The discharge port of the fly ash pretreatment device is connected to the feed port of the geopolymerization reactor 110. The feed port of the geopolymerization reactor 110 is also used to add a curing agent and a curing liquid. The discharge port of the geopolymerization reactor 100 is used to discharge a geopolymer gel. The feed port of the molding and curing device is connected to the discharge port of the geopolymerization reactor 100. The discharge port of the molding and curing device is used to discharge a geopolymer solidified body.

[0029] The geopolymer curing agent preparation system 200 includes a jaw crusher 210 and a screening machine 220. The feed port of the jaw crusher 210 is connected to the discharge port of the molding and curing equipment. The discharge port of the jaw crusher 210 is used to discharge the geopolymer curing agent. The discharge port of the jaw crusher 210 is connected to the feed port of the screening machine 220. The screening machine 220 includes a first discharge port. The first discharge port of the screening machine 220 is used to discharge the geopolymer curing agent with a particle size reaching a specified size.

[0030] like Figure 1 and Figure 2As shown, in this embodiment, the fly ash solidification system 100 is used to solidify the waste incineration fly ash into a geopolymer solidified body. The feed port of the fly ash pretreatment equipment is used to add fly ash, and after the fly ash is pretreated by the fly ash pretreatment equipment, it is discharged from the discharge port of the fly ash pretreatment equipment, and when discharged, it enters the geopolymerization reactor 110 from the feed port of the geopolymerization reactor 110. When the fly ash enters the geopolymerization reactor 110, the feed port of the geopolymerization reactor 110 is also added with a curing agent and a curing liquid, such as aluminum silicon source material and / or aluminum source material, calcium source material, first alkali solution, sewage, silicon source material and second alkali solution, and when adding, the pretreated fly ash can be added to the sewage together with the aluminum silicon source material and / or aluminum source material, calcium source material, and first alkali solution, stirred and mixed to obtain a uniform slurry; and the silicon source material can be mixed with the second alkali solution, stirred to obtain a uniform liquid; then the above-mentioned uniform slurry and uniform liquid are added to the geopolymerization reactor 110 for mixing, and the geopolymerization reactor 110 sets corresponding conditions, and disperses, mixes, dissolves, reacts, polymerizes, etc., through stirring, heating, and cooling, to obtain a geopolymer gel. The fly ash processing capacity of the geopolymerization reactor 110 can be 100 to 1500L / time, the stirring speed can be 60 to 80r / min, and the stirring time can be 10 to 30min. The geopolymer gel is discharged from the discharge port of the geopolymerization reactor 110 and discharged into the molding and curing equipment. The curing and molding equipment is used to prepare the geopolymer gel into a specified shape, for example, arrange it in a specified mold, and perform curing and molding. After curing, the geopolymer gel can be prepared into a geopolymer solidified body, which is discharged from the discharge port of the curing and molding equipment.

[0031] like Figure 1 and Figure 3 As shown, the geopolymer curing agent preparation system 200 is used to prepare the geopolymer solidified body into the geopolymer curing agent. The cured and formed geopolymer solidified body is added to the jaw crusher 210, and the jaw crusher 210 crushes the geopolymer solidified body into granular or powdery geopolymer curing agents. Then, through the screening of the screening machine 220, the geopolymer curing agent with a particle size reaching a specified size can be obtained, and the geopolymer curing agent with a particle size reaching the standard is discharged from the first discharge port of the screening machine 220. The specified size can be adjusted according to the actual application needs of the geopolymer curing agent. The geopolymer curing agent with a particle size reaching the standard can be directly used as a landfill closure material.

[0032] It can be understood that the present application completes the effective solidification and removal of all polluting components in the waste incineration fly ash by solidifying the waste incineration fly ash to form a geopolymer solid body, and then making the geopolymer solid body into a geopolymer solidifying agent, thereby truly realizing the harmless treatment and resource utilization of the waste incineration fly ash.

[0033] Specifically, the fly ash pretreatment equipment includes a water washing device 120 and a high-temperature furnace 130. The feed port of the water washing device 120 is used to add fly ash, and the discharge port of the water washing device 120 is connected to the feed port of the high-temperature furnace 130. The discharge port of the high-temperature furnace 130 is the discharge port of the fly ash pretreatment equipment.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, it is exemplified that the pretreatment process of fly ash includes water washing and high temperature treatment in sequence, the water washing device 120 and the high temperature furnace 130 are continuously arranged, the feed port of the water washing device 120 is the feed port of the fly ash pretreatment equipment, and the discharge port of the high temperature furnace 130 is the discharge port of the fly ash pretreatment equipment. The water washing device 120 can be a fly ash washing machine, which has the functions of collecting, spraying, washing, separating, and drying. The fly ash enters the water washing device 120 from the feed port of the water washing device 120, and is washed by the water washing device 120 to wash out the soluble substances in the waste incineration fly ash and reduce the concentration of soluble salts. In the water washing device 120, the fly ash is mixed with water according to the liquid-solid mass ratio of water to fly ash of 2:1 to 5:1, stirred for 0.5 to 6 hours, and then dehydrated and dried. The washed fly ash is discharged from the discharge port of the washing device 120 to the feed port of the high temperature furnace 130 and enters the high temperature furnace 130. In the high temperature furnace 130, the dried fly ash is heated at 850 to 1000° C. for 1 to 4 hours for high temperature treatment. The high temperature treated fly ash is discharged from the discharge port of the high temperature furnace 130 to the feed port of the geopolymerization reactor 110 and enters the geopolymerization reactor 110.

[0035] It can be understood that, in this embodiment, by pre-treating the waste incineration fly ash, it is convenient for the subsequent solidification treatment of the waste incineration fly ash, thereby facilitating the harmless treatment and resource utilization of the waste incineration fly ash.

[0036] Specifically, the molding and curing equipment includes an extrusion molding machine 140, a blank cutter 150 and a curing chamber 160. The feed port of the molding and curing equipment is the feed port of the extrusion molding machine 140, and the discharge port of the molding and curing equipment is the discharge port of the curing chamber 160. The discharge port of the extrusion molding machine 140 is connected to the feed port of the curing chamber 160, and the blank cutter 150 is arranged at the discharge port of the extrusion molding machine 140.

[0037] like Figure 1 and Figure 2As shown, in this embodiment, it is exemplified that after the geopolymer gel is obtained by the geopolymer reactor 110, the geopolymer gel then undergoes the processes of molding and curing in sequence. The geopolymer gel is prepared and molded by the extruder 140 and the cutter 150. When the geopolymer gel is discharged from the discharge port of the geopolymer reactor 110, it is discharged to the feed port of the extruder 140 and enters the extruder 140, and the extruder 140 extrude the geopolymer gel to obtain a material of a specified shape. When the aforementioned material is discharged from the discharge port of the extruder 140, the cutter 150 cuts the discharged material. The cut material can be placed in a block mold, that is, molded; the block mold is a detachable steel mold, and multiple molds can be used cyclically according to production needs. After the material is molded, it further enters the curing chamber 160 for curing and molding. The curing chamber 160 is a closed space that can automatically adjust the temperature and humidity, with the adjustment range of temperature from 30°C to 90°C and relative humidity from 20% to 80%. The curing time is 7 to 14 days until the reaction is complete. After curing, a geopolymer solidified body can be obtained, and the geopolymer solidified body is discharged from the discharge port of the curing chamber 160.

[0038] It can be understood that, in this embodiment, the geopolymer gel is prepared and cured in sequence to obtain a geopolymer solidified body, so as to further obtain a geopolymer curing agent.

[0039] More specifically, the fly ash solidification system 100 further includes a fly ash silo 170 , and a discharge port of the fly ash silo 170 is connected to a feed port of the water washing device 120 .

[0040] like Figure 1 and Figure 2 As shown, in this embodiment, the fly ash silo 170 is used to store waste incineration fly ash. After the waste incineration fly ash is collected, it is added to the fly ash silo 170. When the waste incineration fly ash needs to be disposed of, the waste incineration fly ash is discharged from the discharge port of the fly ash silo 170 and discharged to the feed port of the water washing device 120 to perform a pre-treatment step of water washing in the water washing device 120.

[0041] It can be understood that, in this embodiment, by providing the fly ash silo 170 , it is easier to obtain the fly ash from the waste incineration during the process of disposing and utilizing the fly ash, which is more convenient.

[0042] More specifically, a spiral feeding device 180 is provided between the discharge port of the fly ash silo 170 and the feed port of the water washing device 120 , and fly ash is added from the discharge port of the fly ash silo 170 to the feed port of the water washing device 120 through the spiral feeding device 180 .

[0043] like Figure 1 and Figure 2As shown, in this embodiment, the spiral feeding device 180 can be a spiral feeding machine, and the spiral feeding device 180 is used to transport the waste incineration fly ash, and its feed port and discharge port can be respectively connected with the discharge port of the fly ash silo 170 and the feed port of the water washing device 120. When the waste incineration fly ash is discharged from the discharge port of the fly ash silo 170, it is discharged to the feed port of the spiral feeding device 180, and after being transported by the spiral feeding device 180, it is discharged from the discharge port of the spiral feeding device 180 to the feed port of the water washing device 120, so as to achieve the purpose of adding the waste incineration fly ash into the water washing device 120.

[0044] It can be understood that this embodiment, by providing a spiral feeding device 180, can realize automatic feeding of waste incineration fly ash from the fly ash silo 170 to the water washing device 120, thereby improving the efficiency of waste incineration fly ash in the process of disposal and utilization, and reducing labor intensity and labor costs compared to manual feeding.

[0045] Specifically, the geopolymer curing agent preparation system 200 further includes a crushing device 230, and the screening machine 220 further includes a second discharge port, the second discharge port of the screening machine 220 is used to discharge the geopolymer curing agent whose particle size does not reach the specified size, the feed port of the crushing device 230 is connected to the second discharge port of the screening machine 220, and the discharge port of the crushing device 230 is used to discharge the crushed geopolymer curing agent;

[0046] The waste incineration fly ash disposal and utilization system also includes a geopolymer preparation system 300, which includes a stirring device 310, an air-drying zone 320, a water-washing and drying device 330 and a molding device 340. The discharge port of the crushing device 230 is connected to the feed port of the stirring device 310, and the feed port of the stirring device 310 is also used to add high molecular polymers, waste residues and sewage. The discharge port of the stirring device 310 is used to discharge the slurry of geopolymer. The discharge port of the stirring device 310 is connected to the air-drying zone 320, and the air-drying zone 320 is used to air-dry the slurry of geopolymer to obtain a dried body of geopolymer. The feed port of the water-washing and drying device 330 is used to add the dried body of geopolymer. The discharge port of the water-washing and drying device 330 is used to discharge the slurry of geopolymer. The discharge port of the water-washing and drying device 330 is connected to the feed port of the molding device 340, and the discharge port of the molding device 340 is used to discharge geopolymer.

[0047] like Figure 1 , Figure 3 and Figure 4As shown, in this embodiment, it is exemplarily explained that after screening by the screening machine 220, the geopolymer curing agent with a particle size reaching the specified size is discharged from the first discharge port, and the geopolymer curing agent with a particle size not reaching the specified size is discharged from the second discharge port. After the geopolymer curing agent that does not reach the specified size is discharged from the second discharge port of the screening machine 220, it is discharged into the crushing device 230. The crushing device 230 can be a grinding machine, which is used to further grind the geopolymer curing agent with a particle size not reaching the specified size into fine powder to obtain the crushed geopolymer curing agent. The crushed geopolymer curing agent is used to prepare geopolymer soil, wherein the stirring device 310, the air drying area 320, the water washing and drying device 330 and the molding device 340 are continuously arranged. When preparing geopolymer soil, the crushed geopolymer curing agent is added to the feed port of the stirring device 310, and at the same time, high molecular polymer, waste residue and sewage are also added together, and the slurry of geopolymer soil is obtained by stirring. The stirring speed of the stirring device 310 is 60 to 80 r / min, and the stirring time is 5 to 20 min. The mortar of the geopolymer soil is discharged from the discharge port of the stirring device 310 to the air-drying zone 320. During the specific operation, the mortar of the geopolymer soil can be transported by a conveyor belt or other device. In the air-drying zone 320, the mortar of the geopolymer soil is laid on the interlayer for natural air drying to obtain a dried body of the geopolymer soil. The interlayer is spaced from the ground, and a porous ventilation duct is provided under the interlayer to enhance the effect of natural air drying. The dried body of the geopolymer soil is further added to the water-washing and drying device 330, which can be a water-washing and drying machine, which includes functions such as water washing, stirring, filtering, and drying. The dried body of the geopolymer soil is immersed in water in the water-washing and drying device 330 for 4 to 12 hours and then heated and dried to obtain a slurry of the geopolymer soil, and the soluble salts in the geopolymer soil are further removed. The slurry of geopolymer soil is discharged from the discharge port of the water washing and drying device 330 to the feed port of the molding device 340. The molding device 340 may be a molding machine, which may include the functions of granulation and molding. The slurry of geopolymer soil may be extruded and molded in the molding device 340, and according to the application requirements, the geopolymer soil may be made into particles of different particle sizes and products of different shapes. Geopolymer soil may also be used as a landfill closure material, and may also be used to make road subgrades, protective materials, vegetation restoration materials, mine backfill and ecological restoration materials, seabed foundation components and other facilities.

[0048] It can be understood that the present application further prepares geopolymeric soil through geopolymeric curing agent, further enriches the application scenarios of waste incineration fly ash after treatment, and improves the effect of harmless treatment and resource utilization of waste incineration fly ash.

[0049] More specifically, the geopolymer curing agent preparation system 200 also includes a geopolymer curing agent mixing device 240, the feed port of the geopolymer curing agent mixing device 240 is connected to the first discharge port of the screening machine 220, the feed port of the geopolymer curing agent mixing device 240 is also used to add leachate, garbage concentrate or water, the discharge port of the geopolymer curing agent mixing device 240 is used to discharge liquid geopolymer curing agent, and the discharge port of the geopolymer curing agent mixing device 240 is connected to the feed port of the stirring device 310.

[0050] In this embodiment, it is exemplified that the geopolymer curing agent with a particle size reaching a specified size obtained by screening by the screening machine 220 can also be further prepared as geopolymer soil. At this time, the first discharge port of the screening machine 220 is connected to the feed port of the geopolymer curing agent preparation device 240, and the geopolymer curing agent with a particle size reaching a specified size is added to the geopolymer curing agent preparation device 240, and the landfill leachate, landfill concentrate or water is also added together. After the geopolymer curing agent preparation device 240 stirs the above materials, liquid geopolymer curing agent can be obtained, and the liquid geopolymer curing agent is discharged from the discharge port of the geopolymer curing agent preparation device 240 to the feed port of the stirring device 310 to be further prepared as geopolymer soil.

[0051] It can be understood that this embodiment can achieve the purpose of preparing geopolymeric solidifier with a particle size reaching a specified size into geopolymeric soil through the geopolymeric solidifier preparation equipment 240; at the same time, it can also coordinate the disposal of various pollutants such as garbage leachate, garbage concentrate, domestic sewage, waste alkali liquid, etc. during the process of solidifying and disposing of garbage incineration fly ash.

[0052] More specifically, the geopolymer preparation system 300 also includes an air separation device (not shown in the figure), which is arranged between the crushing device 230 and the stirring device 310, and the feed port of the air separation device is connected to the discharge port of the crushing device 230, and the discharge port of the air separation device is connected to the feed port of the stirring device 310.

[0053] In this embodiment, the air selection device can be an air selector, which is used to feed the crushed geopolymer curing agent into the stirring device 310. The feed port and the discharge port of the air selection device can be respectively connected to the discharge port of the crushing device 230 and the feed port of the stirring device 310. After the crushed geopolymer curing agent is discharged from the discharge port of the crushing device 230, it is sucked from the feed port of the air selection device and discharged from the discharge port to the feed port of the stirring device 310.

[0054] It can be understood that, in this embodiment, by providing the air separation equipment, it is convenient to load the crushed geopolymer curing agent, and then it is convenient to further prepare the geopolymer curing agent into geopolymer soil.

[0055] The implementation principle of a waste incineration fly ash disposal and utilization system provided in this application is:

[0056] The waste incineration fly ash is discharged from the discharge port of the fly ash silo 170 to the spiral feeding device 180, and enters the water washing device 120 from the feed port of the water washing device 120 for water washing only. The washed waste incineration fly ash is discharged from the discharge port of the water washing device 120 to the feed port of the high-temperature furnace 130, and the high-temperature furnace 130 performs high-temperature treatment on it, and then adds it to the geopolymerization reactor 110, together with the curing agent and curing liquid. After passing through the geopolymerization reactor 110, a geopolymer gel can be obtained. The geopolymer gel passes through the extruder 140 and the curing chamber 160 in sequence to obtain a geopolymer solidified body. The geopolymer solidified body is added to the jaw crusher 210, and after crushing, a geopolymer curing agent can be obtained. The geopolymer curing agent further enters the screening machine 220. Through the screening of the screening machine 220, the geopolymer curing agent with a particle size reaching the specified size can be discharged from the first discharge port, and the geopolymer curing agent with a particle size not reaching the specified size can be discharged from the second discharge port. The geopolymer curing agent discharged from the first discharge port can be directly used as a cushion material for road engineering, or can be further added to the geopolymer curing agent preparation device 240, and garbage leachate, garbage concentrate or water are also added together. After passing through the geopolymer curing agent preparation device 240, liquid geopolymer curing agent can be obtained. The aforementioned geopolymer curing agent discharged from the second discharge port can be added to the crushing device 230 to further grind the geopolymer curing agent with a particle size not reaching the specified size into fine powder. The crushed geopolymer curing agent and the liquid geopolymer curing agent can both be added to the stirring device 310, and high molecular polymers, waste residues and sewage are also added together. After passing through the stirring device 310, a slurry of geopolymer soil can be obtained. The slurry of geopolymer soil is naturally air-dried in the air-drying area 320 to obtain a dried body of geopolymer soil. The dried body of geopolymer soil is added to the water-washing and drying device 330 to obtain a slurry of geopolymer soil. The slurry of geopolymer soil is added to the molding device 340 to obtain geopolymer soil.

[0057] This application solidifies the waste incineration fly ash to form a geopolymer solidified body, and then makes the geopolymer solidified body into a geopolymer solidifying agent, which effectively solidifies and removes all pollutants in the waste incineration fly ash, including heavy metals such as Zn, Pb, Cr, Cd, Hg, As, dioxins, and soluble chlorine, which meet the national standard limit indicators. The geopolymer solidifying agent can be directly used as a landfill closure material, truly realizing the harmless treatment and resource utilization of waste incineration fly ash. The geopolymer solidifying agent is further prepared into geopolymer soil, which can also be used to make road subgrades, protective materials, vegetation restoration materials, mine backfill and ecological restoration materials, submarine foundation components and other facilities, further enriching the application scenarios of waste incineration fly ash after treatment.

[0058] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A waste incineration fly ash disposal and utilization system, characterized in that: The waste incineration fly ash disposal and utilization system comprises: A fly ash solidification system (100), comprising a fly ash pretreatment device, a geopolymerization reactor (110) and a molding and curing device, wherein the fly ash pretreatment device is used to pretreat fly ash, the discharge port of the fly ash pretreatment device is connected to the feed port of the geopolymerization reactor (110), the feed port of the geopolymerization reactor (110) is also used to add a curing agent and a curing liquid, the discharge port of the geopolymerization reactor (110) is used to discharge a geopolymer gel, the feed port of the molding and curing device is connected to the discharge port of the geopolymerization reactor (110), and the discharge port of the molding and curing device is used to discharge a geopolymer solidified body; The molding and curing equipment comprises an extrusion molding machine (140), a blank cutter (150) and a curing chamber (160); the feed inlet of the molding and curing equipment is the feed inlet of the extrusion molding machine (140); the discharge port of the molding and curing equipment is the discharge port of the curing chamber (160); the discharge port of the extrusion molding machine (140) is connected to the feed inlet of the curing chamber (160); and the blank cutter (150) is arranged at the discharge port of the extrusion molding machine (140); A geopolymer curing agent preparation system (200) comprises a jaw crusher (210) and a screening machine (220), wherein the feed port of the jaw crusher (210) is connected to the discharge port of the molding and curing equipment, the discharge port of the jaw crusher (210) is used to discharge the geopolymer curing agent, the discharge port of the jaw crusher (210) is connected to the feed port of the screening machine (220), the screening machine (220) comprises a first discharge port, and the first discharge port of the screening machine (220) is used to discharge the geopolymer curing agent with a particle size reaching a specified size.

2. The waste incineration fly ash disposal and utilization system according to claim 1 is characterized in that: The fly ash pretreatment equipment comprises a water washing device (120) and a high-temperature furnace (130), wherein the feed port of the water washing device (120) is used for adding fly ash, the discharge port of the water washing device (120) is connected to the feed port of the high-temperature furnace (130), and the discharge port of the high-temperature furnace (130) is the discharge port of the fly ash pretreatment equipment.

3. The waste incineration fly ash disposal and utilization system according to claim 2 is characterized in that: The fly ash solidification system (100) further comprises a fly ash silo (170), wherein the discharge port of the fly ash silo (170) is connected to the feed port of the water washing device (120).

4. The waste incineration fly ash disposal and utilization system according to claim 3 is characterized in that: A spiral feeding device (180) is provided between the discharge port of the fly ash silo (170) and the feed port of the water washing device (120), and the fly ash is added from the discharge port of the fly ash silo (170) to the feed port of the water washing device (120) through the spiral feeding device (180).

5. The waste incineration fly ash disposal and utilization system according to claim 1, characterized in that: The geopolymer curing agent preparation system (200) further comprises a pulverizing device (230), the screening machine (220) further comprises a second discharge port, the second discharge port of the screening machine (220) is used to discharge the geopolymer curing agent whose particle size does not reach a specified size, the feed port of the pulverizing device (230) is connected to the second discharge port of the screening machine (220), and the discharge port of the pulverizing device (230) is used to discharge the pulverized geopolymer curing agent; The waste incineration fly ash disposal and utilization system also includes a geopolymer preparation system (300), and the geopolymer preparation system (300) includes a stirring device (310), an air drying area (320), a water washing and drying device (330) and a molding device (340). The discharge port of the crushing device (230) is connected to the feed port of the stirring device (310). The feed port of the stirring device (310) is also used to add high molecular polymers, waste residues and sewage. The discharge port of the stirring device (310) is used to discharge the slurry of the geopolymer. The discharge port of the device (310) is connected to the air-drying zone (320), and the air-drying zone (320) is used to air-dry the slurry of the geopolymer to obtain the dried body of the geopolymer. The feed port of the water-washing and drying device (330) is used to add the dried body of the geopolymer, and the discharge port of the water-washing and drying device (330) is used to discharge the slurry of the geopolymer. The discharge port of the water-washing and drying device (330) is connected to the feed port of the molding device (340), and the discharge port of the molding device (340) is used to discharge the geopolymer.

6. The waste incineration fly ash disposal and utilization system according to claim 5, characterized in that: The geopolymer curing agent preparation system (200) also includes a geopolymer curing agent mixing device (240), the feed port of the geopolymer curing agent mixing device (240) is connected to the first discharge port of the screening machine (220), the feed port of the geopolymer curing agent mixing device (240) is also used to add landfill leachate, landfill concentrate or water, the discharge port of the geopolymer curing agent mixing device (240) is used to discharge liquid geopolymer curing agent, and the discharge port of the geopolymer curing agent mixing device (240) is connected to the feed port of the stirring device (310).

7. The waste incineration fly ash disposal and utilization system according to claim 5, characterized in that: The geopolymer preparation system (300) further comprises an air selection device, which is arranged between the pulverizing device (230) and the stirring device (310), and the feed port of the air selection device is connected to the discharge port of the pulverizing device (230), and the discharge port of the air selection device is connected to the feed port of the stirring device (310).

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