CN218672233U - System for treating household garbage incineration fly ash by melting rotary kiln - Google Patents
System for treating household garbage incineration fly ash by melting rotary kiln Download PDFInfo
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- CN218672233U CN218672233U CN202223262955.3U CN202223262955U CN218672233U CN 218672233 U CN218672233 U CN 218672233U CN 202223262955 U CN202223262955 U CN 202223262955U CN 218672233 U CN218672233 U CN 218672233U
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Abstract
The utility model relates to an utilize rotary kiln melting to deal with domestic waste incineration flying ash system belongs to hazardous waste and deals with technical field. Solves the problem of disposing the incineration fly ash of the hazardous waste household garbage. The device comprises a pretreatment system, a rotary kiln, a water quenching machine, a sorting machine and a flue gas treatment system, wherein a discharge port of the pretreatment system and the rotary kiln, the water quenching machine and the sorting machine are sequentially connected to form a slag treatment path, and a smoke outlet of the rotary kiln is connected with the flue gas treatment system to form a flue gas treatment path. The utility model adopts the rotary kiln as a melting furnace, carries out melting solidification treatment on the waste incineration fly ash at 1400 ℃, effectively decomposes dioxin in the fly ash under the high-temperature condition, and solidifies most heavy metals in melting ash, thereby realizing the harmless treatment target; in addition, the treated fly ash after the melting treatment has the mass of 47 percent and the volume of about 29 percent of the original mass, thereby realizing the treatment and resource utilization of the reduction of hazardous wastes.
Description
Technical Field
The utility model relates to a waste incineration flying ash processing system belongs to hazardous waste processing technology field.
Background
Along with the increasing of the incineration treatment amount of the household garbage, the fly ash amount generated by the household garbage is increased in proportion, the slag and smoke dust amount generated after the treatment by the traditional municipal household garbage incineration treatment method is generally 10% -20% and 1% -5% of the total amount of the original garbage, and if the slag and smoke dust amount formed by the agents such as slaked lime added in the smoke purification treatment and garbage incineration process is added, the total amount of the slag and smoke dust accounts for 35% -45% of the total amount of the original garbage. The fly ash contains a large amount of undegradable highly toxic substances, namely dioxin and heavy metals, so that the fly ash belongs to dangerous waste. At present, most of waste incineration power plants adopt chelating agents or cement to solidify fly ash and then send the fly ash to a landfill site for landfill. Although the curing treatment method is simple and low in cost, the fly ash weight gain after curing reaches about 36%, so that the defect of overlarge compatibilization exists, and the strength of a cured body is obviously weakened if the cured body meets acidic conditions, so that the risk of secondary leaching of toxic substances such as heavy metals exists. And with the increasing of the waste incineration treatment capacity, the landfill pressure of a landfill site is increased, and the land resource is seriously occupied.
Therefore, it is necessary to provide a system for melting and disposing fly ash from incineration of household garbage by using a rotary kiln to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses how to carry out the problem of innoxious, resourceization, minimizing the processing with hazardous waste domestic waste incineration fly ash that research and development was solved. A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the utility model:
the utility model provides an utilize rotary kiln melting to deal with domestic waste incineration flying ash system, includes pretreatment system, rotary kiln, shrend, sorter and flue gas processing system, the discharge gate of pretreatment system, rotary kiln, shrend, sorter are connected in order and are formed the slag and handle the way, and the discharge gate of rotary kiln is connected with flue gas processing system and is formed the flue gas and handle the way.
Preferably: the pretreatment system comprises a washing device, a water quality purification device, an evaporative salt device and a drying device, wherein the washing device, the water quality purification device, the evaporative salt device, the drying device and the rotary kiln are sequentially connected.
Preferably: the flue gas treatment system comprises a quench tower, a bag-type dust remover and a spray tower, wherein the rotary kiln, the quench tower, the bag-type dust remover and the spray tower are connected in sequence.
Preferably: the separator is a slag separator.
Preferably: and a full-sealing chain plate metering scale is arranged between the rotary kiln feed inlet and the drying device, and the rotary kiln discharge outlet is connected with the water quenching machine through a chute.
Preferably: the rotary kiln body is a corundum rotary kiln, and the water quenching machine is a vibration water quenching machine.
The utility model discloses following beneficial effect has:
the utility model adopts the rotary kiln as a melting furnace, carries out melting solidification treatment on the waste incineration fly ash at 1400 ℃, effectively decomposes dioxin in the fly ash under the high-temperature condition, and solidifies most heavy metals in melting ash, thereby realizing the harmless treatment target; in addition, the treated fly ash after melting treatment has the mass of 47 percent and the volume of about 29 percent of the original mass, thereby realizing the treatment of hazardous waste reduction; the molten ash after being treated by the water quenching mode has small, crisp and low hardness, can be used for building materials including roadbed aggregates, asphalt concrete, cement, water permeable bricks and glass ceramics, and can also be used for preparing porous materials, thereby realizing the recycling treatment of garbage.
Drawings
FIG. 1 is a schematic view of a system for treating fly ash from incineration of household garbage by melting in a rotary kiln.
In the figure: 1-pretreatment system, 2-rotary kiln, 3-water quenching machine, 4-sorting machine, 5-flue gas treatment system, 11-water washing device, 12-water quality purification device, 13-salt evaporation device, 14-drying device, 51-quench tower, 52-bag dust collector, and 53-spray tower.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the system for melting and disposing fly ash from burning household garbage by using a rotary kiln of the embodiment comprises a pretreatment system 1, a rotary kiln 2, a water quenching machine 3, a sorting machine 4 and a flue gas treatment system 5, wherein the pretreatment system 1, a discharge port of the rotary kiln 2, the water quenching machine 3 and the sorting machine 4 are sequentially connected to form a slag treatment path, and a smoke outlet of the rotary kiln 2 is connected with the flue gas treatment system 5 to form a flue gas treatment path; the rotary kiln 2 is used as a melting furnace, the waste incineration fly ash is subjected to melting solidification treatment at 1400 ℃, dioxin in the fly ash is effectively decomposed at high temperature, and most heavy metals are solidified in molten ash, so that the aim of harmless treatment is fulfilled; in addition, the treated fly ash after melting treatment has the mass of 47 percent and the volume of about 29 percent of the original mass, thereby realizing the treatment of hazardous waste reduction; the molten ash processed by adopting a water quenching mode has small, crisp and low hardness, can be used for building materials including roadbed aggregate, asphalt concrete, cement, permeable bricks and glass ceramics, can also be used for preparing porous materials, and realizes the recycling treatment of garbage.
The pretreatment system 1 comprises a washing device 11, a water quality purification device 12, a salt evaporation device 13 and a drying device 14, wherein the washing device 11, the water quality purification device 12, the salt evaporation device 13, the drying device 14 and the rotary kiln 2 are sequentially connected; because the salt content and the chloride ion concentration in the fly ash are very high, the fly ash is treated before being put into a rotary kiln through the pretreatment system 1, the formed high-temperature molten salt and acidic substances are prevented from generating chemical reaction with structures such as a rotary kiln lining and the like, and serious corrosion is avoided, meanwhile, the pretreatment system can evaporate and purify salt accounting for 30 percent of the total weight of the fly ash through the salt evaporation device 13, the salt is mainly potassium salt and sodium salt, the current market price of the potassium salt is about 2700-3000 yuan/ton, the market price of the sodium salt is 200-350 yuan/ton, and the part can be used as an additional economic value, so that the overall economic benefit is improved.
The flue gas treatment system 5 comprises a quenching tower 51, a bag-type dust remover 52 and a spray tower 53, wherein the rotary kiln 2, the quenching tower 51, the bag-type dust remover 52 and the spray tower 53 are sequentially connected; the fly ash is pretreated by a pretreatment system and is sent into a rotary kiln, molten slag is conveyed to a water quenching machine for water quenching treatment, the treated molten slag passes through a slag separator to separate metal and ash, dioxin can be generated secondarily under the low-temperature condition, therefore, a quench tower is arranged at a smoke outlet of the rotary kiln, high-temperature smoke at a rotary smoke outlet passes through the quench tower, the smoke temperature is reduced to below 200 ℃ within 2s, secondary generation of the dioxin is inhibited, the low-temperature smoke is dedusted by a bag-type dust remover and is desulfurized by a spray tower, namely, a draught fan discharges the treated smoke through a chimney.
The separator 4 is a slag separator.
A full-sealing chain plate metering scale is arranged between the feed inlet of the rotary kiln 2 and the drying device 14, the full-sealing chain plate metering scale is adopted for feeding, the discharge outlet of the rotary kiln 2 is connected with the water quenching machine 3 through a chute, slag is continuously discharged from the discharge outlet of the rotary kiln, and the slag enters the vibration water quenching machine through the chute to be subjected to water quenching treatment; the rotary kiln adopts a highly-closed refractory structure, the operating temperature in the kiln is 1400 ℃, the fly ash can be melted and solidified, most heavy metals are wrapped in the melted ash, the national heavy metal control standard is met, the quality and the volume of the melted fly ash are greatly reduced, the melted fly ash can be used as a building material for resource utilization, the harmless, reduction and resource treatment of the hazardous wastes are realized, and the dioxin is completely decomposed at high temperature.
The rotary kiln 2 is a rotary kiln made of corundum materials, and the water quenching machine 3 is a vibration water quenching machine; the refractoriness is 1200-1850 degrees, and the corundum brick has good acid and alkali corrosion resistance, so that the problem of corrosion of fly ash melt to the lining of the rotary kiln can be effectively solved.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, the skilled person can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides an utilize rotary kiln melting to handle domestic waste incineration fly ash system which characterized in that: including pretreatment system (1), rotary kiln (2), shrend (3), sorter (4) and flue gas processing system (5), the discharge gate, shrend (3), sorter (4) of pretreatment system (1), rotary kiln (2) are connected in order and are formed the slag and handle the way, and the exhaust port and the flue gas processing system (5) of rotary kiln (2) are connected and are formed the flue gas and handle the way.
2. The system for melting and disposing the fly ash generated by burning the household garbage by using the rotary kiln as claimed in claim 1, wherein: the pretreatment system (1) comprises a washing device (11), a water quality purification device (12), an evaporative salt device (13) and a drying device (14), wherein the washing device (11), the water quality purification device (12), the evaporative salt device (13), the drying device (14) and the rotary kiln (2) are sequentially connected.
3. The system for melting and disposing the fly ash generated by burning the household garbage by using the rotary kiln as claimed in claim 1, wherein: the flue gas treatment system (5) comprises a quenching tower (51), a bag-type dust remover (52) and a spray tower (53), wherein the rotary kiln (2), the quenching tower (51), the bag-type dust remover (52) and the spray tower (53) are sequentially connected.
4. The system for melting and disposing household garbage incineration fly ash by using the rotary kiln as claimed in claim 1, wherein: the separator (4) is a slag separator.
5. The system for melting and disposing the fly ash generated by burning the household garbage by using the rotary kiln as claimed in claim 2, wherein: a full-sealing chain plate metering scale is arranged between the feed inlet of the rotary kiln (2) and the drying device (14), and the discharge outlet of the rotary kiln (2) is connected with the water quenching machine (3) through a chute.
6. The system for melting and disposing the fly ash generated by burning the household garbage by using the rotary kiln as claimed in claim 5, wherein: the rotary kiln (2) is a corundum rotary kiln, and the water quenching machine (3) is a vibration water quenching machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223262955.3U CN218672233U (en) | 2022-12-06 | 2022-12-06 | System for treating household garbage incineration fly ash by melting rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223262955.3U CN218672233U (en) | 2022-12-06 | 2022-12-06 | System for treating household garbage incineration fly ash by melting rotary kiln |
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| Publication Number | Publication Date |
|---|---|
| CN218672233U true CN218672233U (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223262955.3U Active CN218672233U (en) | 2022-12-06 | 2022-12-06 | System for treating household garbage incineration fly ash by melting rotary kiln |
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| CN (1) | CN218672233U (en) |
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- 2022-12-06 CN CN202223262955.3U patent/CN218672233U/en active Active
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