CN211770897U - System for full recycling of aluminum profile sludge - Google Patents
System for full recycling of aluminum profile sludge Download PDFInfo
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- CN211770897U CN211770897U CN201922027115.0U CN201922027115U CN211770897U CN 211770897 U CN211770897 U CN 211770897U CN 201922027115 U CN201922027115 U CN 201922027115U CN 211770897 U CN211770897 U CN 211770897U
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Abstract
A system for full recycling of aluminum profile sludge comprises: the drying system is used for drying wet sludge containing certain moisture from an aluminum profile factory; the dust collection system is connected with the drying system and used for collecting dried aluminum profile sludge and dust in the drying waste gas to obtain sludge dry powder; the caching storage bin is connected with the dust collecting system and caches the sludge dry powder; the calcining system is connected with the cache bin and is used for carrying out high-temperature calcination on the cache bin, and a high-temperature tail gas outlet of the calcining system is connected to the drying system through an induced draft fan to serve as a part of heat source; the cooling system is connected with the calcining system and used for cooling the calcined product; and the desulfurization and defluorination system is connected with the waste gas outlet of the drying system to recover fluorine and sulfur in the waste gas. The utility model discloses can realize the full resource of aluminium alloy mud.
Description
Technical Field
The invention belongs to the technical field of solid waste disposal and resource utilization, and particularly relates to a system for full recycling of aluminum profile sludge.
Background
During the degreasing, acid etching, alkali etching, neutralization, anodic oxidation, coloring, hole sealing and spraying treatment processes of the aluminum profile, a large amount of waste liquid generated is subjected to preliminary filter pressing treatment to form wet sludge with the water content higher than 80% and high viscosity. According to statistics, the national aluminum profile yield is up to 4845.52 ten thousand tons only in 2014, and generally, each ton of profile can produce 0.05 ton of sludge, namely, about 242.26 ten thousand tons of sludge are produced every year, and the production quantity of the sludge is continuously increased along with the development of the domestic building market. The aluminum profile sludge contains a certain amount of heavy metals and has leaching toxicity, and the aluminum profile sludge is easy to cause damage to organisms, water bodies and soil, which is difficult to repair, after being exposed in the environment for a long time. The current mainstream treatment mode is mainly chelating and burying, and the principle of reduction, harmlessness and resource utilization cannot be realized without analyzing and treating by using technical means.
The chemical components of the dried aluminum profile sludge show that the content of aluminum oxide is about 65-80%, the content of conventional silicon oxide, calcium oxide, iron oxide and the like is about 18-33%, the balance is a small amount of impurities and heavy metals, the mineral form is low-crystalline aluminum oxide hydrate and a part of amorphous bodies, the particle size is very small, the specific surface area is large, the activity is very high, and the resource utilization potential is huge.
One of the dangerous characteristics of part of the aluminum profile sludge is that the aluminum profile sludge contains certain heavy metals and has certain leaching toxicity, which not only causes higher disposal cost, but also causes difficulty in resource utilization.
The second dangerous characteristic of part of the aluminum profile sludge is that the aluminum profile sludge contains higher fluorine and sulfur, and the fluorine is silicon tetrafluoride (SiF) in the process of calcining, calcining and solidifying heavy metals at high temperature4) In the form of a gas of (1), sulfur being predominantly SOxThe tail gas enters the calcining furnace and is discharged along with the hot flue gas. The fluorine-containing sulfur-containing gas not only has strong corrosivity and causes a certain resource waste while causing serious environmental pollution.
The aluminum profile sludge is reasonably recycled and recycled, waste is changed into valuable, green recycling of resources is achieved, the current situation of aluminum profile sludge disposal can be improved, the aluminum profile industrial structure is upgraded, the aluminum mine resource utilization pattern in China is improved, and the method has important environmental protection and economic significance.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the aluminum profile sludge full-recycling system which has the characteristics of reliable technical route, full recycling of sludge, environment-friendly and energy-saving process, flexible final product and strong market adaptability.
In order to achieve the purpose, the invention adopts the technical scheme that:
a system for full recycling of aluminum profile sludge comprises:
the drying system is used for drying wet sludge containing certain moisture from an aluminum profile factory;
the dust collecting system is connected with the drying system and used for collecting dried aluminum profile sludge and dust in the drying waste gas to obtain sludge dry powder;
the caching storage bin is connected with the dust collecting system and caches the sludge dry powder;
the calcining system is connected with the cache bin and is used for carrying out high-temperature calcination on the cache bin, and a high-temperature tail gas outlet of the calcining system is connected to the drying system through an induced draft fan to serve as a part of heat source;
the cooling system is connected with the calcining system and used for cooling the calcined product;
and the desulfurization and defluorination system is connected with the waste gas outlet of the drying system to recover fluorine and sulfur in the waste gas.
The drying system is a suspended state circulating drying scattering system of patent No. CN207600116U, the calcining system is a rotary kiln calcining system, a suspended state calcining system, a circulating fluidized bed calcining system or other high-temperature calcining systems, and the cooling system is a multi-stage cyclone cooling cylinder, a single cylinder cooler, a grate cooler or other cooling systems.
The desulfurization and defluorination system mainly comprises an absorption unit and a desulfurization and defluorination agent preparation system, wherein the absorption unit is a multi-stage water absorption tower, a multi-stage chemical absorption tower or a series and parallel combination thereof for absorbing used medicine limestone, quicklime and Ca (OH)2NaOH, ammonia or other absorbents.
The calcining system is provided with a combustion system in a matching way, and the fuel used for the combustion system can be light diesel oil, heavy diesel oil, natural gas, coal gas, biomass fuel and other fuels.
The drying system is matched with a hot air preparation system, and the fuel used for the hot air preparation system can be light diesel oil, heavy diesel oil, natural gas, coal gas, biomass fuel and other fuels.
Compared with the prior art, the invention has the beneficial effects that:
1) the aluminum profile sludge is completely recycled, the discharge and disposal cost of hazardous waste is reduced, the consumption of original aluminum resources is reduced, and the resource and ecological environment protection in China is facilitated.
2) The process is mature and reliable, and no secondary pollution is generated in the production process.
3) The product quality is good, and the market demand is effectively filled.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, a system for recycling aluminum profile sludge mainly comprises a drying system, a dust collecting system, a buffer storage bin, a calcining system, a cooling system, a desulfurization and defluorination system, and the like, and the process flow is as follows:
the first step is as follows: drying wet sludge containing certain moisture from an aluminum profile factory in a drying system, wherein the drying system can adopt a suspension state circulating drying and scattering system with the patent number of CN207600116U, the drying system is provided with a hot air preparation system in a matching way, and fuels used for the hot air preparation system can be light diesel oil, heavy diesel oil, natural gas, coal gas, biomass fuel and other fuels;
the second step is that: the dried aluminum profile sludge enters a dust collection system along with the drying waste gas to be collected to prepare dry powder, and the dry powder is conveyed into a cache bin for caching by a conveying system;
the third step: feeding the sludge dry powder in the buffer bin into a high-temperature calcining system for calcining, removing impurities and solidifying heavy metals in the calcining process, enabling sulfur and fluorine in the sludge to enter calcining tail gas in the form of gaseous compounds, solidifying and melting the heavy metals in the sludge in a eutectic crystal lattice at high temperature, the purification of the aluminum profile sludge is realized, the calcined clinker powder is sent into a finished product system by a conveying device after being cooled to be used as a finished product of the high-alumina powder for storage, packaging or bulk shipment, wherein the calcining system can be a rotary kiln calcining system, a suspension state calcining system, a circulating fluidized bed calcining system or other high-temperature calcining systems, the calcining system is provided with a combustion system in a matching way, the fuel used for the combustion system can be light diesel oil, heavy diesel oil, natural gas, coal gas, biomass fuel and other fuels, and the cooling system can be a multi-stage cyclone cooling cylinder, a single-cylinder cooler, a grate cooler or other cooling systems;
the fourth step: introducing high-temperature tail gas exhausted by the high-temperature calcination system as a partial heat source of the drying system by an induced draft fan, and completely drying wet mud, wherein the hot air temperature of the drying system is 80-600 ℃, and the high-temperature calcination temperature is 800-1300 ℃;
the fifth step: the waste gas discharged by the drying system is introduced into a desulfurization and defluorination system by an induced draft fan to recover fluorine and sulfur in the waste gas, the desulfurization and defluorination system mainly comprises an absorption unit and a desulfurization and defluorination agent preparation system, and the absorption unitCan be a multi-stage water absorption tower, a multi-stage chemical absorption tower or a series and parallel combination thereof, and absorbs the used medicine limestone, quicklime and Ca (OH)2NaOH, ammonia or other absorbents; wet materials such as villiaumite, sulfate and the like obtained by desulfurization and defluorination are scattered and dried by a suspension state circulating drying scattering system to prepare dry powder byproducts for storage or packaging for bulk transportation, and the byproducts such as fluorite powder, hydrofluoric acid, cryolite intermediate products, desulfurized gypsum, sulfuric acid and the like can be prepared by desulfurization and defluorination according to different used absorbents;
and a sixth step: the flue gas purified by the fluorine and sulfur recovery system meets the national emission standard, the flue gas is led out of the system by a draught fan and is discharged into the atmosphere, and a small amount of waste water generated by waste gas treatment is discharged after reaching the standard through water treatment.
In summary, in the invention, wet sludge containing certain moisture generated by an aluminum profile factory is fed into a suspension state circulating drying and scattering system through a feeding system to be prepared into dry powder for temporary storage. The dry powder is fed into a calcining system for calcining by a conveying device after being metered. In the calcining process, sulfur and fluorine in the sludge enter calcining tail gas in the form of gaseous compounds, and the tail gas is sent into a drying system through an induced draft fan to be used for drying wet sludge; heavy metals in the sludge are solidified and melted in the eutectic crystal lattice at high temperature, so that the purification of the aluminum profile sludge is realized. After high-temperature calcination, the high-alumina powder is cooled by a cooling system and then is sent to a finished product system by a conveying device for storage or packaging and bulk distribution. And tail gas exhausted by the drying system is introduced into the desulfurization and defluorination system by the draught fan and is exhausted after reaching the standard. Wet materials of the desulfurization and defluorination byproducts obtained by waste gas treatment and recovery are prepared into dry powder by a suspension state circulating drying and scattering system, and then are sold as fluorine resource and sulfur resource products; a small amount of waste water generated by waste gas treatment is discharged after reaching the standard through water treatment. Thereby realizing the full recycling of the aluminum profile sludge.
Claims (5)
1. The utility model provides a system of full resource of aluminium alloy mud which characterized in that includes:
the drying system is used for drying wet sludge containing certain moisture from an aluminum profile factory;
the dust collection system is connected with the drying system and used for collecting dried aluminum profile sludge and dust in the drying waste gas to obtain sludge dry powder;
the caching storage bin is connected with the dust collecting system and caches the sludge dry powder;
the calcining system is connected with the cache bin and is used for carrying out high-temperature calcination on the cache bin, and a high-temperature tail gas outlet of the calcining system is connected to the drying system through an induced draft fan to serve as a part of heat source;
the cooling system is connected with the calcining system and used for cooling the calcined product;
and the desulfurization and defluorination system is connected with the waste gas outlet of the drying system to recover fluorine and sulfur in the waste gas.
2. The system for fully recycling aluminum profile sludge according to claim 1, wherein the calcining system is a rotary kiln calcining system, a suspension calcining system or a circulating fluidized bed calcining system, and the cooling system is a multi-stage cyclone cooling cylinder, a single cylinder cooler or a grate cooler.
3. The system for recycling aluminum profile sludge according to claim 1, wherein the desulfurization and defluorination system mainly comprises an absorption unit and a desulfurization and defluorination agent preparation system, wherein the absorption unit is a multistage water absorption tower, a multistage chemical absorption tower or a series and parallel combination thereof, and is used for absorbing used medicine limestone, quicklime, Ca (OH)2NaOH or ammonia.
4. The system for fully recycling aluminum profile sludge according to claim 1, wherein the calcining system is provided with a combustion system, and the fuel used for the combustion system is light diesel oil, heavy diesel oil, natural gas, coal gas or biomass fuel.
5. The system for recycling aluminum profile sludge according to claim 1, wherein the drying system is provided with a hot air preparation system, and the fuel for the hot air preparation system is light diesel oil, heavy diesel oil, natural gas, coal gas or biomass fuel.
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| CN201922027115.0U CN211770897U (en) | 2019-11-21 | 2019-11-21 | System for full recycling of aluminum profile sludge |
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| CN201922027115.0U CN211770897U (en) | 2019-11-21 | 2019-11-21 | System for full recycling of aluminum profile sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885172A (en) * | 2019-11-21 | 2020-03-17 | 北京中科领向环保研究院有限公司 | Method and system for recycling aluminum profile sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885172A (en) * | 2019-11-21 | 2020-03-17 | 北京中科领向环保研究院有限公司 | Method and system for recycling aluminum profile sludge |
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