CN211464249U - Waste incineration fly ash resource utilization system - Google Patents
Waste incineration fly ash resource utilization system Download PDFInfo
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- CN211464249U CN211464249U CN201921962273.9U CN201921962273U CN211464249U CN 211464249 U CN211464249 U CN 211464249U CN 201921962273 U CN201921962273 U CN 201921962273U CN 211464249 U CN211464249 U CN 211464249U
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Abstract
The utility model relates to a waste incineration flying dust utilization system, including mixer, make-up machine, with the high temperature melting stove that the make-up machine links up, with the cotton unit of the liquation exit linkage of high temperature melting stove and with the flue gas utilization unit of the exhanst gas outlet connection of high temperature melting stove, through batching in waste incineration flying dust feed bin, silica feed bin and fluxing agent feed bin etc. to the mixer. The utility model discloses a mix the shaping with msw incineration flying dust and silica and send into high temperature melting in the stove, can fully handle the msw incineration flying dust effectively, can obtain the heat preservation cotton moreover, realized the resource utilization of msw incineration flying dust, the flue gas that the high temperature melting stove produced also can carry out resource utilization, avoids the energy extravagant.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, concretely relates to waste incineration flying dust utilization system.
Background
The incineration of garbage is considered as a way to break the 'city enclosed by garbage', and fly ash generated by the incineration of garbage belongs to dangerous waste due to complex components and toxic components and heavy metals. How to safely and effectively dispose the waste incineration fly ash becomes an environmental and social problem which needs to be solved urgently.
At present, the mainstream fly ash treatment technologies at home and abroad include chemical agent stabilization, cement and chemical agent solidification/stabilization, cement kiln cooperative treatment, a melting solidification method and other processes. The cement and chemical agent solidification/stabilization is a main treatment mode of fly ash in China at present due to simple process, lower cost and low energy consumption, but the treatment method has the problems of large capacity increase, landfill occupation and long-term stability; the fly ash is cooperatively treated by using the cement kiln, and although the volume reduction of the fly ash can be realized to a certain degree, the process has the defects of complex equipment, high treatment cost and easy secondary pollution caused in the water treatment link. In addition, the cement kiln is used for coprocessing, and the product market acceptance degree is low; the melting solidification has the advantages of stable slag, capability of decomposing dioxin and the like, and is known as a better method for treating the fly ash, but the process equipment is complex and the treatment cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a waste incineration flying ash resource utilization system can solve prior art's partial defect at least.
The utility model discloses still relate to a waste incineration flying dust utilization system, include:
the pretreatment unit comprises a raw material bin, a stirrer connected with the raw material bin through a raw material conveying unit and a forming machine connected with a material outlet of the stirrer, wherein the raw material bin comprises a waste incineration fly ash bin, a silicon dioxide bin and a fluxing agent bin;
the high-temperature melting furnace is connected with a material outlet of the forming machine through a material transferring unit;
the cotton making unit is connected with a melt outlet of the high-temperature melting furnace;
and the flue gas utilization unit is connected with a flue gas outlet of the high-temperature melting furnace.
As one embodiment, the cotton making unit comprises a centrifuge, a cotton collecting machine, a pleating machine and a curing oven which are connected in sequence through a melt transfer unit.
As one embodiment, the air outlet of the cotton collector is sequentially connected with a spray tower and a demister through an exhaust pipeline.
As one embodiment, the flue gas utilization unit comprises a waste heat boiler, and a flue gas inlet of the waste heat boiler is communicated with a flue gas outlet of the high-temperature melting furnace.
As one embodiment, the flue gas utilization unit further comprises an acid making unit for absorbing hydrogen chloride gas in flue gas discharged by the high-temperature melting furnace, and the acid making unit is connected with a flue gas outlet of the waste heat boiler.
As one embodiment, the acid making unit comprises a quenching tower, an absorber and a caustic tower which are connected in sequence through a flue gas pipeline.
In one embodiment, the high-temperature melting furnace is a plasma furnace.
The utility model discloses following beneficial effect has at least:
the utility model provides a waste incineration flying dust utilization system through mixing waste incineration flying dust and silica shaping and sending into high temperature melting in the stove high temperature melting, can not only fully handle waste incineration flying dust effectively, can produce in addition and obtain the heat preservation cotton, has realized the utilization of waste incineration flying dust, and the flue gas that high temperature melting stove produced also can carry out the utilization, avoids the energy extravagant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic composition diagram of a waste incineration fly ash resource utilization system provided by the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 1, an embodiment of the present invention provides a method for resource utilization of fly ash from waste incineration, including:
mixing and molding waste incineration fly ash, silicon dioxide and fluxing agent;
the molding raw materials are sent into a high-temperature melting furnace 21, liquid glass formed in the high-temperature melting furnace 21 is used for preparing heat-preservation cotton, and flue gas generated in the high-temperature melting furnace 21 is recycled.
In the above method, the raw material may be formed into pellets or briquettes, and the raw material may be formed into pellets by, for example, a pelletizer, a ball press, a briquetting apparatus, or the like.
According to the requirement, in the raw material forming production, water can be added into the mixture material to facilitate the forming of the raw material, and after the mixture is initially formed by the forming machine 16, the mixture is dried and formed.
It is understood that the silica can be prepared from silica sand rich in SiO, such as silica sand, in addition to commercially available silica products2The substance of (1). Fluorite can be used as the fluxing agentCommon fluxing agents such as alumina and calcium oxide are not exemplified here.
In the mixed raw materials, the silicon dioxide is mainly used as a raw material for preparing the heat insulation cotton, so that the resource utilization of the heat insulation cotton prepared from the waste incineration fly ash is realized, meanwhile, the silicon dioxide also has the function of assisting fluxing, the melting temperature of the waste incineration fly ash is reduced to a certain extent, the use amount of other fluxing agents is obviously reduced, the amount of slag formed by the fluxing agents and the like can be reduced, and the production control and the energy consumption are convenient to reduce.
In one embodiment, the content of each raw material in the molding raw material is as follows: the waste incineration fly ash comprises 65-83% of waste incineration fly ash, 5-12% of silicon dioxide, 0.5-1.5% of fluxing agent and the balance of water. In another embodiment, the method can also be used for cooperatively treating other solid wastes, such as metallurgical slag, and the content of each raw material in the forming raw material is as follows: 15-45% of waste incineration fly ash, 10-35% of converter steel slag, 5-10% of silicon dioxide, 0.5-1.5% of fluxing agent and the balance of water.
The heating furnace capable of melting at a high temperature such as waste incineration fly ash and metallurgical slag is applicable to this embodiment, for example, an electric melting furnace. In this embodiment, the plasma furnace 21 is used as the high-temperature melting furnace 21, so that the melting effect of the waste incineration fly ash is good, and the hearth reaction and the molten pool reaction are easy to control. In a preferred embodiment, the temperature in the plasma furnace 21 is controlled to be 1000 to 1400 ℃, and more preferably 1200 to 1400 ℃, so that organic matters such as dioxin in the waste incineration fly ash can be decomposed by heating, and the environmental protection and safety of the treatment process can be ensured. In the plasma furnace 21, heavy metal salt substances with lower boiling points in the waste incineration fly ash are transferred to the gas in the furnace, and the rest metals/metal salts/metal compounds are transferred to the molten slag.
Furthermore, the plasma furnace 21 is controlled by a cold top, and materials are sequentially subjected to reaction processes of preheating, primary melting, clarifying and the like from top to bottom in the furnace, so that the removal of harmful substances in the waste incineration fly ash and the formation of glass melt can be ensured.
Based on the method, after the molding material containing the waste incineration fly ash, the silicon dioxide and the fluxing agent is melted at high temperature in the high-temperature melting furnace 21, the molten liquid generated in the high-temperature melting furnace 21 is liquid vitreous body, and therefore the molding material can be used for preparing the heat preservation cotton.
According to the method for recycling waste incineration fly ash provided by the embodiment, the waste incineration fly ash and the silicon dioxide are mixed and molded and are sent into the high-temperature melting furnace 21 for high-temperature melting, so that the waste incineration fly ash can be fully and effectively treated, the heat preservation cotton can be produced, the waste incineration fly ash can be recycled, the flue gas generated by the high-temperature melting furnace 21 can be recycled, and the energy waste can be avoided.
In one embodiment, as shown in fig. 1, the method for recycling the flue gas generated by the high-temperature melting furnace 21 includes: the flue gas enters the waste heat boiler 22 for waste heat utilization, the temperature of the flue gas discharged from the high-temperature melting furnace 21 is high, high-temperature steam generated after passing through the waste heat boiler 22 can be used for power generation and the like, and production benefits and environmental protection benefits are improved.
Further preferably, the resource utilization method of the flue gas generated by the high-temperature melting furnace 21 further includes: after the waste heat of the flue gas is utilized, the hydrogen chloride gas in the flue gas is absorbed to prepare hydrochloric acid. Therefore, hydrochloric acid can be prepared in the waste incineration fly ash treatment process, the resource utilization effect is further improved, meanwhile, the treatment of the exhaust gas of the high-temperature melting furnace 21 is realized, the atmospheric pollution is avoided, and the environmental protection benefit is improved.
Specifically, the preparation process of the hydrochloric acid comprises the following steps: the flue gas at the outlet of the waste heat boiler 22 is quenched firstly, then absorbs the hydrogen chloride gas in the flue gas to prepare hydrochloric acid, and then the flue gas is subjected to acid-base neutralization treatment by alkali washing, so that the flue gas can be discharged up to the standard.
Example two
As shown in fig. 1, the embodiment of the utility model provides a waste incineration fly ash resource utilization system, include:
the device comprises a pretreatment unit and a treatment unit, wherein the pretreatment unit comprises a raw material bin, a stirrer 15 connected with the raw material bin through a raw material conveying unit and a forming machine 16 connected with a material outlet of the stirrer 15, and the raw material bin comprises a waste incineration fly ash bin 11, a silicon dioxide bin 12 and a fluxing agent bin 13;
a high-temperature melting furnace 21, wherein the high-temperature melting furnace 21 is connected with a material outlet of the forming machine 16 through a material transferring unit;
a cotton making unit 24, wherein the cotton making unit 24 is connected with a melt outlet of the high-temperature melting furnace 21;
and the flue gas utilization unit is connected with a flue gas outlet of the high-temperature melting furnace 21.
Similarly, the high-temperature melting furnace 21 is preferably a plasma furnace.
In the above system, the molding of the raw material may be granulation or agglomeration, and for example, the molding machine 16 may be a granulator, a ball press, a briquetting machine, or the like.
The waste incineration fly ash can be added into the mixer 15 through the waste incineration fly ash bin 11, the silica can be added into the mixer 15 through the silica bin 12, and the fluxing agent can be added into the mixer 15 through the fluxing agent bin 13. As mentioned above (see the description of the first embodiment), water may also be added to the mixer 15, i.e. the mixer 15 is further connected to the water feeding pipe 14.
The connection between the stirrer 15 and the garbage incineration fly ash bin 11, the silica bin 12, the flux bin 13, and the forming machine 16 can be realized by a conventional material transfer device such as a belt conveyor, a screw conveyor, etc., and will not be described in detail herein. In another embodiment, the mixer 15 and the forming machine 16 can be separated from each other, the outlet of the mixer 15 is connected to the forming machine 16 through a discharge pipe, and the mixed material falls into the forming machine 16 by self-weight.
Similarly, for the connection between the forming machine 16 and the high-temperature melting furnace 21, a belt conveyor or the like may be used, and further, a material lifting device such as a bucket elevator may be provided as needed, which will not be described in detail herein.
Referring to the related contents of the first embodiment, the liquid vitreous humor generated in the high-temperature melting furnace 21 can be used to prepare insulating cotton by the cotton-making unit 24, and the liquid vitreous humor can be transported by conventional high-temperature liquid transportation equipment, such as a trough or the like, for the purpose of transporting the molten vitreous humor into the cotton-making unit 24.
In a preferred embodiment, as shown in FIG. 1, the cotton production unit 24 includes a centrifuge 241, a collector 242, a pleater 243 and a curing oven 244 connected in series by a melt transfer unit. The liquid glass body discharged from the high-temperature melting furnace 21 passes through a centrifuge 241, a cotton collector 242, a pleater 243 and a curing furnace 244 in sequence, and is cooled and cut to obtain the heat-insulating cotton board. The centrifuge 241 may be a four-roll centrifuge 241, the cotton collector 242, the pleater 243, the curing oven 244, and the like are all existing devices, and the process of preparing the heat preservation cotton by using the liquid vitreous body is also an existing process, and will not be described in detail herein.
Further preferably, as shown in fig. 1, the outlet of the cotton collector 242 is connected with a spray tower 245 and a demister 246 in turn through an exhaust duct, so as to remove the cotton-containing fibers and the like contained in the exhaust gas of the cotton collector 242 and avoid direct exhaust to pollute the air.
Further optimizing the system, as shown in fig. 1, the flue gas utilization unit comprises a waste heat boiler 22, and a flue gas inlet of the waste heat boiler 22 is communicated with a flue gas outlet of the high-temperature melting furnace 21. The exhaust gas discharged from the high-temperature melting furnace 21 is subjected to waste heat recovery through the waste heat boiler 22, and the temperature of the exhaust gas discharged from the high-temperature melting furnace 21 is high, so that high-temperature steam generated after passing through the waste heat boiler 22 can be used for power generation and the like, and the production benefit and the environmental protection benefit are improved.
Further preferably, the flue gas generated by the high-temperature melting furnace 21 can be further recycled, the flue gas utilization unit further comprises an acid making unit 23 for absorbing hydrogen chloride gas in the flue gas discharged by the high-temperature melting furnace 21, and the acid making unit 23 is connected with the flue gas outlet of the waste heat boiler 22. Therefore, hydrochloric acid can be prepared in the waste incineration fly ash treatment process, the resource utilization effect is further improved, meanwhile, the treatment of the exhaust gas of the high-temperature melting furnace 21 is realized, the atmospheric pollution is avoided, and the environmental protection benefit is improved.
Specifically, the preparation process of the hydrochloric acid comprises the following steps: the flue gas at the outlet of the waste heat boiler 22 is quenched firstly, then absorbs the hydrogen chloride gas in the flue gas to prepare hydrochloric acid, and then the flue gas is subjected to acid-base neutralization treatment by alkali washing, so that the flue gas can be discharged up to the standard. Accordingly, as shown in fig. 1, the acid making unit 23 includes a quenching tower 231, an absorber 232, and a caustic tower 233, which are connected in this order through a flue gas duct.
It can be understood that the contents of the solutions of the first embodiment and the second embodiment are related to each other, and the related process solution in the first embodiment is suitable for supplementing the system composition solution in the second embodiment, and similarly, the system composition solution in the second embodiment is also suitable for supplementing the process solution in the first embodiment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A waste incineration fly ash resource utilization system is characterized by comprising:
the pretreatment unit comprises a raw material bin, a stirrer connected with the raw material bin through a raw material conveying unit and a forming machine connected with a material outlet of the stirrer, wherein the raw material bin comprises a waste incineration fly ash bin, a silicon dioxide bin and a fluxing agent bin;
the high-temperature melting furnace is connected with a material outlet of the forming machine through a material transferring unit;
the cotton making unit is connected with a melt outlet of the high-temperature melting furnace;
and the flue gas utilization unit is connected with a flue gas outlet of the high-temperature melting furnace.
2. The waste incineration fly ash resource utilization system according to claim 1, characterized in that: the cotton-making unit comprises a centrifugal machine, a cotton collecting machine, a pleating machine and a curing furnace which are sequentially connected through a melt transfer unit.
3. The waste incineration fly ash resource utilization system according to claim 2, characterized in that: the air outlet of the cotton collecting machine is sequentially connected with a spray tower and a demister through an exhaust pipeline.
4. The waste incineration fly ash resource utilization system according to claim 1, characterized in that: the flue gas utilization unit comprises a waste heat boiler, and a flue gas inlet of the waste heat boiler is communicated with a flue gas outlet of the high-temperature melting furnace.
5. The waste incineration fly ash resource utilization system according to claim 4, wherein: the flue gas utilization unit also comprises an acid making unit for absorbing hydrogen chloride gas in the flue gas discharged by the high-temperature melting furnace, and the acid making unit is connected with a flue gas outlet of the waste heat boiler.
6. The waste incineration fly ash resource utilization system according to claim 5, wherein: the acid making unit comprises a quench tower, an absorber and an alkali wash tower which are sequentially connected through a flue gas pipeline.
7. The waste incineration fly ash resource utilization system according to claim 1, characterized in that: the high-temperature melting furnace adopts a plasma furnace.
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| CN201921962273.9U CN211464249U (en) | 2019-11-14 | 2019-11-14 | Waste incineration fly ash resource utilization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732547A (en) * | 2019-11-14 | 2020-01-31 | 中冶南方都市环保工程技术股份有限公司 | Resource utilization method and system for waste incineration fly ash |
| CN114011840A (en) * | 2021-11-08 | 2022-02-08 | 无锡市中合科技有限公司 | Waste incineration fly ash resource utilization system |
| CN114535247A (en) * | 2022-02-21 | 2022-05-27 | 光大环保技术研究院（深圳）有限公司 | Hazardous waste incineration ash and slag cooperative plasma melting and recycling system and method |
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2019
- 2019-11-14 CN CN201921962273.9U patent/CN211464249U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110732547A (en) * | 2019-11-14 | 2020-01-31 | 中冶南方都市环保工程技术股份有限公司 | Resource utilization method and system for waste incineration fly ash |
| CN114011840A (en) * | 2021-11-08 | 2022-02-08 | 无锡市中合科技有限公司 | Waste incineration fly ash resource utilization system |
| CN114535247A (en) * | 2022-02-21 | 2022-05-27 | 光大环保技术研究院（深圳）有限公司 | Hazardous waste incineration ash and slag cooperative plasma melting and recycling system and method |
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