CN211071252U - Incineration fly ash treatment system - Google Patents
Incineration fly ash treatment system Download PDFInfo
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- CN211071252U CN211071252U CN201921993363.4U CN201921993363U CN211071252U CN 211071252 U CN211071252 U CN 211071252U CN 201921993363 U CN201921993363 U CN 201921993363U CN 211071252 U CN211071252 U CN 211071252U
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Abstract
The fly ash pretreatment subsystem is used for mixing waste incineration fly ash with a curing agent to obtain a first mixture and aging the first mixture, the curing body forming subsystem is used for pressing the aged first mixture into a curing body, and the curing body soaking subsystem is used for soaking the curing body to remove chloride ions.
Description
Technical Field
The utility model relates to an environmental protection technique and solid waste utilization field, further relate to an incineration fly ash processing system.
Background
Industrial waste or solid waste generated in the incineration process of garbage is mainly collected in the form of fly ash by a dust collector of a flue gas treatment system of an incinerator. The fly ash contains a large amount of inorganic salts and contains harmful substances such as Hg, Pb, Cd, Cu, Cr, Zn, Ni and the like and dioxin. The harmful substances are difficult to be discharged out of the body after entering the human body, and can directly damage the nervous system, the digestive system, the reproductive system, the immune system and the bones of the human body, thereby causing the reduction of the activity of the enzyme of the human body, the language and the movement disorder, the damage of the liver and the kidney, the bone loss, the carcinogenesis, the teratogenic mutation, even the death and the like. Therefore, improper treatment of fly ash will have serious impact on human health and environmental protection.
At present, the treatment method of the industrial waste incineration fly ash mainly comprises the steps of producing cement clinker and fixing harmful elements in the fly ash by chemical agents, and then sending the fixed harmful elements to a landfill site for landfill. The method for producing the cement clinker by using the industrial waste incineration fly ash has low efficiency because the fly ash contains a large amount of chloride ions, so that the addition amount of other materials is small. Or, the aim of separating the salt in the fly ash is achieved by adding water into the fly ash, but the fly ash has small specific gravity and small particle size, and the separation of mud and water after adding water is very difficult, so that the cost is high. Moreover, the landfill disposal of the waste incineration fly ash needs to occupy a large amount of land resources, and the hidden danger that harmful substances in the fly ash pollute an ecological system if the disposal is improper exists. In addition, in China, enterprises try to treat industrial waste incineration fly ash by using a plasma high-temperature melting technology, but because the fly ash contains too much salt, a large amount of volatile matters are discharged, the treatment cost is high, and meanwhile, the content of sodium and potassium ions in a molten product is large, so that the molten product is unstable, and harmful heavy metals can be leached out when meeting water.
How to properly treat the fly ash is a social problem which needs to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an incineration fly ash processing system.
The fly ash pretreatment subsystem is used for mixing waste incineration fly ash with a curing agent to obtain a first mixture and aging the first mixture, the curing body forming subsystem is used for pressing the aged first mixture into a curing body, and the curing body soaking subsystem is used for soaking the curing body to remove chloride ions.
Further, the material storage subsystem at least comprises a waste incineration fly ash storage bin, a curing agent storage bin and a reaction water storage bin, wherein the waste incineration fly ash storage bin is used for storing the waste combustion fly ash, the curing agent storage bin is used for storing the curing agent, and the reaction water storage bin is used for storing the reaction water.
Furthermore, the fly ash pretreatment subsystem at least comprises a homogenizing mixer and an aging bin, wherein the homogenizing mixer is used for mixing and stirring the waste incineration fly ash, the curing agent and the reaction water to obtain the first mixture, and the aging bin is used for aging the first mixture.
Further, the soaking solution treatment subsystem is used for treating a soaking waste liquid generated after the solidified body is soaked in the solidified body soaking subsystem, and the soaking solution treatment subsystem carries out recycling treatment on the soaking waste liquid by using a non-toxic treatment machine.
Further, the soak solution treatment subsystem at least comprises a collecting tank, a membrane filtering device and a soak solution comprehensive treatment device, wherein the collecting tank is used for storing and standing for precipitation of the soak waste solution, the membrane filtering device is used for filtering particle impurities in the soak waste solution after standing for precipitation, and the soak solution comprehensive treatment device is used for purifying the filtered soak waste solution by a separator.
Furthermore, the incineration fly ash treatment system also comprises a transmission subsystem, and the transmission subsystem is sequentially connected with the material storage subsystem, the fly ash pretreatment subsystem, the solidified body forming subsystem, the solidified body maintenance subsystem, the solidified body soaking subsystem and the soaking solution treatment subsystem.
Further, the transmission subsystem comprises a material conveying pipeline, a transmission belt and a soaking solution conveying pipeline, the material conveying pipeline is used for conveying the waste incineration fly ash, the curing agent and the reaction water, the transmission belt is used for conveying the first mixture and the curing body, and the soaking solution conveying pipeline is used for conveying the soaking waste liquid.
Further, the solidified body curing subsystem is used for curing the solidified body pressed by the solidified body forming subsystem to improve the strength of the solidified body, and the cured solidified body is soaked in the solidified body soaking subsystem.
Furthermore, the curing body curing subsystem comprises a curing room, a curing temperature adjusting subsystem and a curing ventilation subsystem, wherein the curing room is used for placing the curing body and performing curing, the curing temperature adjusting subsystem is used for adjusting the temperature in the curing room to be kept in a temperature range of 5-200 ℃, and the curing ventilation subsystem is used for adjusting the air environment in the curing room.
Further, the soaking subsystem comprises a soaking water temperature adjusting subsystem, and the soaking water temperature adjusting subsystem is used for adjusting the water temperature of the soaking subsystem to be kept in a temperature range of 5-100 ℃.
The utility model discloses an incineration fly ash processing system can form the solid material that has the skeleton through mixing fly ash and curing agent, and the skeleton of this solid material can be fixed to the granule that is insoluble in water in the fly ash. The mixture is aged and maintained to improve the strength of the solidified body and avoid the solidified body from cracking after soaking in water, so that the fly ash can be buried in a complete form. And then, the solidified body is subjected to immersion type chloride ion precipitation to avoid serious damage to the environment caused by chloride ions permeating into soil due to direct landfill of the solidified body, and the solidified body can be subjected to green landfill after the chloride ions are filtered. The soaking waste liquid can be further recycled, so that the resource utilization rate can be effectively improved, and the environmental pollution is reduced.
Drawings
FIG. 1 is a schematic view of the incineration fly ash treatment system of the present invention.
Description of the main elements
Incineration fly ash treatment system 1
Waste incineration fly ash storage bin 11
Curing agent storage 12
Reaction water storage tank 13
Fly ash pretreatment subsystem 20
Aging storehouse 22
Solidification body forming subsystem 30
Cured body support subsystem 40
Solidified body soaking subsystem 50
Soak solution treatment subsystem 60
Collecting tank 61
Soak solution comprehensive treatment equipment 63
Soak solution delivery line 90
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
The following description will reference the accompanying drawings to more fully describe the present invention. There is shown in the drawings exemplary embodiments of the invention. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals designate identical or similar components.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, as used herein, the terms "comprises," "comprising," "includes" and/or "including" or "having" and/or "having," integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Furthermore, unless otherwise defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present invention, and will not be interpreted in an idealized or overly formal sense.
The following description of exemplary embodiments refers to the accompanying drawings. It should be noted that the components depicted in the referenced drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar terms.
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic view of an incineration fly ash treatment system 1 according to the present invention. An incineration fly ash treatment system 1 comprises a material storage subsystem 10, a fly ash pretreatment subsystem 20, a solidified body forming subsystem 30, a solidified body maintenance subsystem 40, a solidified body soaking subsystem 50 and a soaking solution treatment subsystem 60. The fly ash pretreatment subsystem 20 is used for mixing the waste incineration fly ash with a curing agent to obtain a first mixture and aging the first mixture, the cured body forming subsystem 30 is used for pressing the aged first mixture into a cured body, and the cured body soaking subsystem 50 is used for soaking the cured body to remove chloride ions.
The material storage subsystem 10 at least comprises a waste incineration fly ash storage bin 11, a curing agent storage bin 12 and a reaction water storage bin 13. The waste incineration fly ash storage bin 11 is used for storing the waste incineration fly ash, the curing agent storage bin 12 is used for storing the curing agent, and the reaction water storage bin 13 is used for storing reaction water.
The curing agent can be two or more than two mixed components consisting of alkali metal compounds such as NaOH, KOH, sodium silicate and the like and mineral substances such as fly ash, silica fume, clay and the like. The curing agent can react with the water-insoluble micro-particles in the waste incineration fly ash to form a water-insoluble curing body skeleton structure.
The incineration fly ash treatment system 1 further comprises a transmission subsystem 100, wherein the transmission subsystem 100 is sequentially connected with the material storage subsystem 10, the fly ash pretreatment subsystem 20, the solidified body forming subsystem 30, the solidified body maintenance subsystem 40, the solidified body soaking subsystem 50 and the soaking liquid treatment subsystem 60.
The conveyor subsystem 100 includes a material conveying line 70, a conveyor belt 80, and a soak solution conveying line 90. The material conveying pipeline 70 may be used to convey the waste incineration fly ash, the curing agent and the reaction water, specifically, the material conveying pipeline 70 may be respectively connected to the waste incineration fly ash storage bin 11, the curing agent storage bin 12 and the reaction water storage bin 13 of the material storage subsystem 10 and the fly ash pretreatment subsystem 20, and the material conveying pipeline 70 conveys the waste incineration fly ash, the curing agent and the reaction water to the fly ash pretreatment subsystem 20. The conveying belt 80 is used for conveying the first mixture and the solidified body, and the soaking liquid conveying pipeline 90 is used for conveying the soaking waste liquid.
The fly ash pretreatment subsystem 20 at least comprises a homogenizing mixer 21 and an aging silo 22. The homogenizing mixer 21 is used for mixing and stirring the waste incineration fly ash, the curing agent and the reaction water to obtain a first mixture. Aging bin 22 is used to age the first mixture.
The valves of the fly ash storage bin 11, the curing agent storage bin 12 and the reaction water storage bin 13 are controlled or adjusted to convey and add the waste incineration fly ash, the curing agent and the reaction water to the homogenizing mixer 21 according to the required proportion, and the first mixture in the non-condensed state is obtained through homogenizing, stirring and mixing.
The conveyor belt 80 conveys the first mixture in a non-solidified state to the aging chamber 22 for aging, which may be from 6 hours to 48 hours, during which the adhesive strength inside the first mixture gradually increases, but the first mixture remains in a non-solidified state.
The conveyor belt 80 conveys the aged first mixture to the solidified body forming subsystem 30, and the solidified body forming subsystem 30 may include a pressing device, and the non-solidified first mixture may be pressed by the pressing device at the solidified body forming subsystem 30 to obtain a solidified body, which may be a solid body.
The conveyor belt 80 transports the cured body to the cured body curing subsystem 40 for curing. The solidified body curing subsystem 40 is used for curing the solidified body pressed by the solidified body forming subsystem 30 to improve the strength of the solidified body, and further can prevent the solidified body from cracking due to soaking in the subsequent soaking process.
The solidification body maintenance subsystem 40 may include a maintenance room, a maintenance temperature conditioning subsystem, and a maintenance ventilation subsystem. The curing room is used for placing the solidified body and performing curing, the curing temperature adjusting subsystem is used for adjusting the temperature in the curing room to be kept in a temperature range of 5-200 ℃, and the curing ventilation subsystem is used for adjusting the air environment in the curing room.
The conveyor belt 80 conveys the cured body to the cured body soaking subsystem 50, and the cured body soaking subsystem 50 is used for soaking the cured body to separate out chloride ions in the cured body.
The solidified body soaking subsystem 50 may include a soaking tank and a soaking water temperature adjustment subsystem. The soaking pool is used for placing and soaking the solidified body. The soaking water temperature regulating subsystem can be used for regulating the water temperature (soaking liquid temperature) of the soaking subsystem to be kept in a temperature range of 5-100 ℃.
The soaking solution treatment subsystem 60 is used for treating a soaking waste liquid generated after the solidified body is soaked in the solidified body soaking subsystem 50, and the soaking solution treatment subsystem 60 carries out recycling treatment on the soaking waste liquid by using a non-toxic treatment machine.
The soaking solution treatment subsystem 60 at least comprises a collecting tank 61, a membrane filtering device 62 and a soaking solution comprehensive treatment device 63. The soaking liquid conveying pipeline 90 conveys the soaking waste liquid to a collecting tank 61 of the soaking liquid treatment subsystem 60, the collecting tank is used for storing and standing the soaking waste liquid, the membrane filtering device 62 is used for filtering particle impurities in the soaking waste liquid after standing and precipitating, and the soaking liquid comprehensive treatment equipment 63 is used for carrying out separator purification on the filtered soaking waste liquid.
The solid material having a skeleton which can fix water-insoluble particles in the waste incineration fly ash can be formed by mixing the fly ash with the curing agent. The mixture is aged and maintained to improve the strength of the solidified body and avoid the solidified body from breaking after soaking in water, so that the waste incineration fly ash can be buried in a complete form. And then, the solidified body is subjected to immersion type chloride ion precipitation to avoid serious damage to the environment caused by chloride ions permeating into soil due to direct landfill of the solidified body, and the solidified body can be subjected to green landfill after the chloride ions are filtered. The soaking waste liquid can be further recycled, so that the resource utilization rate can be effectively improved, and the environmental pollution is reduced.
Provides the concrete implementation process and the result of treating the fly ash by two incineration fly ash treatment systems.
Example 1:
the fly ash pretreatment subsystem 20 adds the waste incineration fly ash, the inorganic curing agent and the water into the homogenizing mixer 21 according to the weight ratio of 1: 0.3: 0.2 to mix for 5 minutes to obtain a first mixture. The material conveying pipeline 70 conveys the first mixture to the aging bin 22 for aging reaction, and the aging time is 24 hours. The material conveying pipeline 70 conveys the aged material to the solidified body forming subsystem 30 to be pressed into a formed solidified body, wherein the forming pressure is 150 KN. The formed cured body is conveyed by the conveyor belt 80 to a curing room of the cured body curing subsystem 40 and cured at 25 ℃ for 3 days. The cured body is transferred by the transfer belt 80 to a soaking tank of the cured body soaking subsystem 50, and soaked in water at 25 ℃ for 3 days, the weight of the water being 2 times that of the cured body. Collecting the soaking waste liquid in a collecting tank 61, standing, filtering by a membrane filtering device 62 to remove particles in the liquid, and finally separating and purifying in soaking liquid comprehensive treatment equipment 63. In this example, the volume reduction of the waste incineration fly ash was achieved with a volume reduction ratio of 2.0, and the compressive strength of the cured body after curing was 10MPa or more. The strength loss of the cured body after soaking is less than 5%, the cured body does not swell and the leaching rate of salt is higher than 90%, and the separation of inorganic salt is realized. And conveying the soaked solidified body to a landfill site for landfill treatment.
Example 2:
the fly ash pretreatment subsystem 20 adds the waste incineration fly ash, the inorganic curing agent and the water into the homogenizing mixer 21 according to the weight ratio of 1: 0.2: 0.15 to be mixed for 5 minutes to obtain a first mixture. The material conveying pipeline 70 conveys the first mixture to the aging bin 22 for aging reaction, and the aging time is 12 hours. The material conveying pipeline 70 conveys the aged material to the solidified body forming subsystem 30 to be pressed into a formed solidified body, wherein the forming pressure is 200 KN. The formed cured body is conveyed by the conveyor belt 80 to a curing chamber of the cured body curing subsystem 40 and cured at 80 ℃ for 10 hours. The cured body is transported by the transport belt 80 to a soaking tank of the cured body soaking subsystem 50, and soaked in water of 50 ℃ with the weight of 3 times that of the cured body for 2 days. Collecting the soaking waste liquid in a collecting tank 61, standing, filtering by a membrane filtering device 62 to remove particles in the liquid, and finally separating and purifying in soaking liquid comprehensive treatment equipment 63. In this example, the volume reduction of the waste incineration fly ash was achieved with a volume reduction ratio of 2.5, and the compressive strength of the cured body after curing reached 15MPa or more. The strength of the cured body after soaking is almost free from loss, the cured body is not cracked, the leaching rate of salt is higher than 95%, and the separation of inorganic salt is realized. And conveying the soaked solidified body to a landfill site for landfill treatment.
Hereinbefore, specific embodiments of the present invention have been described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present invention without departing from the spirit and scope of the invention. Such modifications and substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (10)
1. The incineration fly ash treatment system is characterized by comprising a material storage subsystem, a fly ash pretreatment subsystem, a solidified body forming subsystem, a solidified body maintenance subsystem, a solidified body soaking subsystem and a soaking liquid treatment subsystem, wherein the fly ash pretreatment subsystem is used for mixing waste incineration fly ash with a curing agent to obtain a first mixture and aging the first mixture, the solidified body forming subsystem is used for pressing the aged first mixture into a solidified body, and the solidified body soaking subsystem is used for soaking the solidified body to remove chloride ions.
2. The incineration fly ash treatment system according to claim 1, wherein the material storage subsystem includes at least a waste incineration fly ash storage bin for storing the waste combustion fly ash, a curing agent storage bin for storing the curing agent, and a reaction water storage bin for storing reaction water.
3. The incineration fly ash treatment system of claim 2, wherein the fly ash pretreatment subsystem comprises a homogenizing mixer and an aging silo, the homogenizing mixer is used for mixing and stirring the waste incineration fly ash, the curing agent and the reaction water to obtain the first mixture, and the aging silo is used for aging the first mixture.
4. The incineration fly ash treatment system of claim 2, wherein the soaking solution treatment subsystem is configured to treat a soaking waste solution generated after the solidified body is soaked by the solidified body soaking subsystem, and the soaking solution treatment subsystem performs a detoxification treatment machine recovery treatment on the soaking waste solution.
5. The incineration fly ash treatment system according to claim 4, wherein the soaking liquid treatment subsystem comprises at least a collection tank, a membrane filtration device and a soaking liquid comprehensive treatment device, the collection tank is used for storing and standing still for precipitation of the soaking waste liquid, the membrane filtration device is used for filtering particulate impurities in the soaking waste liquid after standing still for precipitation, and the soaking liquid comprehensive treatment device is used for performing separator purification on the filtered soaking waste liquid.
6. The incineration fly ash treatment system of claim 4, wherein the incineration fly ash treatment system further comprises a transmission subsystem, and the transmission subsystem is sequentially connected with the material storage subsystem, the fly ash pretreatment subsystem, the solidified body forming subsystem, the solidified body curing subsystem, the solidified body soaking subsystem and the soaking solution treatment subsystem.
7. The incineration fly ash treatment system of claim 6, wherein the transport subsystem comprises a material transport pipe for transporting the waste incineration fly ash, the curing agent and the reaction water, a transport belt for transporting the first mixture and the cured body, and a soaking liquid transport pipe for transporting the soaking waste liquid.
8. The incineration fly ash disposal system of claim 1, wherein the solidified body curing subsystem is configured to perform a curing treatment on the solidified body pressed by the solidified body forming subsystem to increase the strength of the solidified body, and the cured solidified body is immersed in the solidified body immersion subsystem.
9. The incineration fly ash treatment system of claim 8, wherein the solidified body maintenance subsystem includes a maintenance room for placing the solidified body and performing maintenance, a maintenance temperature adjustment subsystem for adjusting a temperature in the maintenance room to be maintained in a temperature range of 5 to 200 ℃, and a maintenance ventilation subsystem for adjusting an air environment inside the maintenance room.
10. The incineration fly ash treatment system of claim 1, wherein the solidified body soaking subsystem comprises a soaking water temperature adjusting subsystem for adjusting the water temperature of the soaking subsystem to be maintained within a temperature range of 5 to 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993363.4U CN211071252U (en) | 2019-11-18 | 2019-11-18 | Incineration fly ash treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993363.4U CN211071252U (en) | 2019-11-18 | 2019-11-18 | Incineration fly ash treatment system |
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| CN211071252U true CN211071252U (en) | 2020-07-24 |
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| CN201921993363.4U Active CN211071252U (en) | 2019-11-18 | 2019-11-18 | Incineration fly ash treatment system |
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Address after: 518105 building a, No.18, Industrial Avenue, third industrial zone, Bitou community, Songgang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Environmental Protection Technology Group Co.,Ltd. Patentee after: Shenzhen Aerospace New Material Technology Co.,Ltd. Address before: 518105 building a, No.18, Industrial Avenue, third industrial zone, Bitou community, Songgang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Environmental Protection Technology Group Co.,Ltd. Patentee before: Shenzhen Aerospace New Material Technology Co.,Ltd. Address after: 518105 building a, No.18, Industrial Avenue, third industrial zone, Bitou community, Songgang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Environmental Protection Technology Group Co.,Ltd. Patentee after: Shenzhen Aerospace New Material Technology Co.,Ltd. Address before: 518105 building a, No.18, Industrial Avenue, third industrial zone, Bitou community, Songgang street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN SHENTOU ENVIRONMENT TECHNOLOGY Co.,Ltd. Patentee before: Shenzhen Aerospace New Material Technology Co.,Ltd. |
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