阅读说明：本技术 一种金属污泥转化处理工艺 (Metal sludge conversion treatment process ) 是由 丁小富 于 2021-01-11 设计创作，主要内容包括：本发明涉及一种金属污泥转化处理工艺,有如下加工步骤：干污泥、湿污泥和污泥添加剂输送至混料机内,在混料机内搅拌均匀后倒入造粒机内造粒；造粒成型后形成的混合污泥通过输送机输送至烧结炉内烧结；烧结完成后结合熔融添加剂由输送机送至熔融炉内熔融；熔融完成后的熔融料放到水淬池内进行水淬处理,水淬处理形成水淬渣放置到水淬渣罐内,再由提升机输送至磨机内研磨形成掺合料。本发明优点：1.实现金属污泥无害化处置与资源化高附加值利用。2.解决污泥堆积、运输和填埋问题,并解决金属污泥对环境的污染。(The invention relates to a metal sludge conversion treatment process, which comprises the following processing steps: conveying the dry sludge, the wet sludge and the sludge additive into a mixer, uniformly stirring in the mixer, and pouring into a granulator for granulation; conveying the mixed sludge formed after granulation and molding to a sintering furnace through a conveyor for sintering; after sintering, the mixture is combined with a melting additive and sent to a melting furnace by a conveyor to be melted; and (3) putting the molten material after the melting is finished into a water quenching tank for water quenching treatment, putting water-quenched slag formed by the water quenching treatment into a water-quenched slag tank, and conveying the water-quenched slag into a grinding machine by a lifting machine to grind the water-quenched slag to form admixture. The invention has the advantages that: 1. realizing the harmless treatment and the resource high-added-value utilization of the metal sludge. 2. Solves the problems of sludge accumulation, transportation and landfill, and solves the pollution of metal sludge to the environment.)

1. A metal sludge conversion treatment process is characterized in that: the method comprises the following processing steps:

1) dry sludge and wet sludge are respectively arranged in two sludge pools, the sludge is respectively grabbed from a dry sludge pool (19) and a wet sludge pool (19) through a travelling crane grab bucket (11) and is reamed and weighed by a reamer scale (12), then the sludge is respectively arranged in a dry sludge storage tank (13) and a wet sludge storage tank (14), the dry sludge is conveyed to a mixer (2) after being reamed by a belt scale (15), the wet sludge is reamed and reamed by the reamer scale (12) and then conveyed to the mixer (2), and a sludge additive in a sludge additive tank (17) is reamed and reamed by the reamer scale (12) and then conveyed to the mixer (2);

2) the dry sludge, the wet sludge and the sludge additive are uniformly stirred in a mixer (2) and then poured into a granulator (3) for granulation;

3) conveying the mixed sludge formed after granulation and molding to a sintering furnace (4) through a conveyor (18) for sintering;

4) after sintering, the mixture is conveyed to a lifter (41) through a conveyor (18), and then conveyed to a sintering material storage tank (42) by the lifter (41) for storage and standby, when the next process needs to be carried out, the mixture is conveyed to a sintering material pre-discharging tank (43) by a conveyor (18), the mixture is weighed by a belt weigher (15) in combination with a melting additive in a melting additive tank (44) and then conveyed into a melting furnace (5) by the conveyor (18) for melting, a dust collecting pipe (46) of a dust collector (45) is arranged above equipment between the conveyor (18) below a granulator (3) and the conveyor (18) below a sintering material storage tank (42), the upper end of the dust collecting pipe (46) is connected with the dust collector (45), the dust collector (45) is externally connected with a flue gas treatment system (47), flue gas enters the flue gas treatment system (47) for purification and then is discharged, and sintering material particles collected by the dust collector (45) are returned to the sintering material storage tank (42);

5) the melted materials after being melted are placed into a water quenching pool (61) for water quenching treatment, water quenching treatment is carried out to form water quenching slag, the water quenching slag is placed into a water quenching slag tank (62), and the water quenching slag is conveyed to a lifter (41) by a belt scale (15) in combination with engineering waste materials in an engineering waste material tank (63), and then is conveyed into a mill (7) by the lifter (41);

6) the mill (7) is connected with a sintering furnace (4) and an exhaust pipe to heat an inner cavity of the mill (7) and dry moisture carried by water-quenched slag, the mill (7) grinds the water-quenched slag and engineering waste, dust generated in the grinding process is collected to a dust collector (45) through a dust collecting pipe (46) and then conveyed to a flue gas treatment system (47) for purification, ground finished products and ground particles collected by the dust collector (45) are conveyed to a lifting machine (41) through a conveyor (18), and then conveyed to a finished product tank (8) by the lifting machine (41) for storage.

2. The metal sludge conversion treatment process according to claim 1, wherein: the weight ratio of the dry sludge, the wet sludge and the sludge additive is 40-45%, 40-50% and 10-15%, and the sludge additive comprises the following components: the weight ratio of the fluorite, the waste gypsum, the coal gangue and the coal dust in the sludge additive is 10-12.5%, 40-50% and 30-35%.

3. The metal sludge conversion treatment process according to claim 1, wherein: the sintering temperature of the sintering furnace (4) is 1050-1150 ℃, and the sintering time is 18-24 hours.

4. The metal sludge conversion treatment process according to claim 1, wherein: the weight of the melting additive accounts for 10-15% of the total melting material, and the melting additive comprises the following components: the weight ratio of the feldspar, the carbide slag, the barium compound and the boron compound in the melting additive is 24-32%, 48-56%, 4-6% and 14-16%. The barium compound is barium sulfate or barium carbonate, and the boron compound is borax or boric acid.

5. The metal sludge conversion treatment process according to claim 1, wherein: the melting temperature of the melting furnace (5) is 1350-1450 ℃, and the melting time is 1-2 hours.

6. The metal sludge conversion treatment process according to claim 1, wherein: the engineering waste materials are slag, water purifying agent waste residues and crystal sludge, and the proportion of the water-quenched slag, the water purifying agent waste residues and the crystal sludge is 60-70%, 20-25%, 5-15% and 5-10%.

7. The metal sludge conversion treatment process according to claim 1, wherein: the specific surface area of the powder obtained by grinding with the grinder (7) is 600-700 square meters per kilogram.

Technical Field

The invention relates to the field of metal sludge treatment, in particular to a metal sludge conversion treatment process.

Background

The electroplating sludge refers to heavy metal-containing sludge waste generated after wastewater treatment in the electroplating industry, and is a seventeenth type of hazardous waste listed in the national hazardous waste list. Although the amount of the "final state substance" in the electroplating wastewater is much smaller than that in the wastewater, the heavy metals such as copper, nickel, cadmium, zinc, and iron in the wastewater are transferred to the sludge, and the electroplating sludge is more harmful to the environment than the electroplating wastewater. If the electroplating sludge with great harmfulness is not disposed, the damage to the ecological environment is self-evident, and on the other hand, if the heavy metal substances with extremely high grade in the electroplating sludge are not recycled, the huge waste of resources is also implied. Therefore, the method has great significance for harmless treatment and resource comprehensive utilization of the electroplating heavy metal sludge.

The electroplating sludge contains a large amount of heavy metals such as chromium, cadmium, zinc and the like, and is easy to pollute the environment, and in recent years, the treatment technologies for the electroplating sludge at home and abroad comprise a solidification stabilization technology, a landfill and stacking technology, a heavy metal recovery technology, a material technology and the like. The melting solidification is one of the most stable and safe methods for treating the dangerous solid wastes which are generally recognized at present, and also is an important research direction in the field of electroplating sludge treatment.

Although the total amount of sludge is smaller than that of wastewater, it is more difficult to treat sludge than wastewater. From the viewpoint of environmental pollution control and resource recycling, the treatment of the electroplating sludge has the following two principles: firstly, after treatment, the sludge does not cause secondary pollution, namely harmless treatment; and secondly, comprehensively recycling the heavy metal resources in the sludge, namely recycling the heavy metal resources.

1. Curing and stabilizing technology: the solidification process is a process of changing engineering properties (such as permeability, compressibility, strength, etc.) of waste using additives, and mainly includes: cement solidification, lime solidification, thermoplastic solidification, melt solidification, self-cementation solidification. Commonly used curing agents are cement, asphalt, glass, lime, thermoplastic substances, and the like. The cement solidification is the most common solidification technology, and has the advantages of very effective treatment of heavy metal wastes such as electroplating sludge and the like, low investment and operation cost, cheap and easily-obtained raw materials, simple operation, stable solidified body and the like. It also has a large footprint. Unstable heavy metal in the solidified body, and the like.

2. Burying and stacking: sea reclamation was once a way of disposing of electroplating sludge, but solid waste sea reclamation is prohibited successively in the united states and europe and america in order to protect the sea, so at present, the main disposal method of solid waste such as electroplating sludge is safe landfill. Of electroplating sludgeMain pollutant component Cr (OH)₃When exposed to air, can be absorbed by O in the air under alkaline conditions₂Oxidizing to Cr³⁺Reversible conversion to Cr⁶⁺If the electroplating sludge is not treated but randomly stacked and buried, the electroplating sludge is blown by wind and rain, so that pollution is diffused, and more serious consequences are brought to the environment.

The components and properties of the electroplating sludge are very complex, effective treatment of the electroplating sludge is always a key and difficult point of research, and the currently popular method for solidifying the sludge has the risk of secondary environmental pollution. Therefore, the development of a method for treating electroplating sludge suitable for sustainable development is urgent, and the resource utilization of electroplating sludge is the most rapidly developed. The melting solidification technology has shown strong advantages in the aspect of industrial hazardous solid waste treatment, and a new development direction is provided for electroplating sludge treatment.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at various defects and shortcomings in the prior art, the metal sludge conversion treatment process capable of changing waste into valuables is provided.

The specific technical scheme of the invention is as follows: a metal sludge conversion treatment process comprises the following processing steps:

1. the method comprises the following steps that dry sludge and wet sludge are respectively arranged in two sludge pools, the sludge is respectively grabbed from the dry sludge pool and the wet sludge pool through a crane grab bucket and is reamed to a reamer scale to be smashed and weighed, then the sludge is respectively arranged in a dry sludge storage tank and a wet sludge storage tank, the dry sludge is conveyed to a mixer after being weighed through a belt scale, the wet sludge is reamed and smashed through the reamer scale and is then conveyed to the mixer, and a sludge additive in a sludge additive tank is reamed and reamed through the reamer scale and is then conveyed to the mixer;

2. uniformly stirring the dry sludge, the wet sludge and the sludge additive in a mixer, and then pouring the mixture into a granulator for granulation;

3. conveying the mixed sludge formed after granulation and molding to a sintering furnace through a conveyor for sintering;

4. conveying the sintered material to a lifter through a conveyor after sintering is finished, conveying the sintered material to a sintered material storage tank for storage by the lifter for standby use, conveying the sintered material to a sintered material pre-discharging tank through the conveyor when a next procedure is required to be performed, weighing the fused additive in a fused additive tank through a belt scale, conveying the fused additive into a melting furnace through the conveyor for melting, arranging a dust collecting pipe of a dust collector above equipment between the conveyor below a granulator and the conveyor below the sintered material storage tank, connecting the upper end of the dust collecting pipe with the dust collector, externally connecting the dust collector with a flue gas treatment system, purifying and discharging the flue gas after the flue gas enters the flue gas treatment system, and returning sintered material particles collected by the dust collector to the sintered material storage tank;

5. putting the melted materials into a water quenching tank for water quenching treatment, putting water quenched slag formed by the water quenching treatment into a water quenched slag tank, conveying the engineering waste materials combined with the engineering waste material tank into a lifter by a belt scale, and conveying the engineering waste materials into a mill by the lifter;

6. the mill is connected with a sintering furnace tail gas pipe to heat an inner cavity of the mill, moisture carried by water-quenched slag is dried, the mill grinds the water-quenched slag and engineering waste, dust generated in the grinding process is collected to a dust collector through a dust collecting pipe and then conveyed to a flue gas treatment system to be purified, and ground finished products and grinding particles collected by the dust collector are conveyed to a lifter through a conveyor and then conveyed to a finished product tank for storage through the lifter.

Furthermore, the weight ratio of the dry sludge, the wet sludge and the sludge additive is 40-45%, 40-50% and 10-15%, and the sludge additive comprises the following components: the weight ratio of the fluorite, the waste gypsum, the coal gangue and the coal dust in the sludge additive is 10-12.5%, 40-50% and 30-35%, and the sludge additive provides fuel for the sintering process and reduces the melting point, so that the sintering process is smoother.

Furthermore, the sintering temperature of the sintering furnace is 1050-1150 ℃, and the sintering time is 18-24 hours.

Furthermore, the weight of the melting additive accounts for 10-15% of the total melting material, and the melting additive comprises the following components: the weight proportion of the feldspar, the carbide slag, the barium compound and the boron compound in the melting additive is 24-32%, 48-56%, 4-6% and 14-16%. The barium compound is barium sulfate or barium carbonate, the boron compound is borax or boric acid, and feldspar and carbide slag are used for adjusting mineral components and improving the activity; the barium compound and the boron compound are used as fluxing agents to reduce the melting point of the sintering material.

Furthermore, the melting temperature of the melting furnace is 1350-1450 ℃, and the melting time is 1-2 hours.

Furthermore, the engineering waste materials are slag, water purifying agent waste residues and crystal sludge, the proportion of the water-quenched slag, the water purifying agent waste residues and the crystal sludge is 60-70%, 20-25%, 5-15% and 5-10%, and the engineering waste materials are added to cooperatively treat other waste materials on the premise of ensuring the quality of the water-quenched slag, so that the production cost is reduced.

Furthermore, the specific surface area of the powder obtained by grinding with a grinder is 600-700 square meters per kilogram, so that the comprehensive performance of the admixture is ensured.

The finished product is an anticorrosive high-performance concrete composite admixture, and when the admixture needs to be used, the admixture is unloaded from a finished product tank onto a transport truck and then is transported to a cement plant and a concrete mixing plant for use through a transport vehicle. The admixture is suitable for industrial and civil buildings, roads, railways, ocean engineering and severe western corrosive environments, and has wide application range.

Due to the adoption of the technical scheme, the invention has the following advantages: 1. the metal sludge is recycled, waste is changed into valuable, the metal sludge is processed, the heavy metal ions are solidified and detoxified, new vitality is endowed to the metal sludge, a material with new application is formed, the market competitiveness of enterprises is improved, the profits of the enterprises are increased, and the cost of the enterprises is saved. 2. Solves the problems of sludge accumulation, transportation and landfill, greatly saves the operation cost and solves the pollution of metal sludge to the environment.

Drawings

FIG. 1: is a process flow chart of the invention.

Detailed Description

Embodiments of the present invention are described with reference to the accompanying drawings.

Example 1

A metal sludge conversion treatment process comprises the following processing steps:

1. the method comprises the steps that dry sludge and wet sludge are respectively arranged in two sludge pools, the sludge is grabbed from a dry sludge pool 19 and a wet sludge pool 19 through a travelling grab bucket 11 and then is reamed and weighed by a reamer balance 12, the sludge is then respectively arranged in a dry sludge storage tank 13 and a wet sludge storage tank 14, the dry sludge is reamed and weighed by a belt balance 15 and then is conveyed to a mixer 2, the wet sludge is reamed and shredded by the reamer balance 12 and then is conveyed to the mixer 2, sludge additives in a sludge additive tank 17 are reamed and reamed by the reamer balance 12 and then are conveyed to the mixer 2, the dry sludge accounts for 40%, the wet sludge accounts for 50% and the sludge additives account for 10%, the dry sludge accounts for 10%, the wet sludge accounts for 10%, the sludge additives and the sludge additives account for 10%, the dry sludge accounts for 10%, the waste gypsum accounts for 10%, the coal gangue accounts for 50%.

2. And conveying the mixed sludge formed after granulation and molding to a sintering furnace 4 through a conveyor 18 for sintering, wherein the sintering temperature of the sintering furnace 4 is 1050 ℃, and the sintering time is 24 hours.

3. After sintering, the mixture is conveyed to a lifting machine 41 through a conveyor 18, and then conveyed to a sintering material storage tank 42 by the lifting machine 41 for storage and standby use, when the next process is required, the mixture is conveyed to a sintering material pre-discharge tank 43 by the conveyor 18, and is conveyed to a melting furnace 5 by the conveyor 18 after being weighed by a belt scale 15 in combination with a melting additive in a melting additive tank 44 for melting, wherein the weight of the melting additive accounts for 10% of the total melting material, the proportion of components in the melting additive is that feldspar accounts for 24%, carbide slag accounts for 56%, barium sulfate accounts for 4% and borax accounts for 16%, the melting temperature is 1450 ℃, and the melting time is 1 hour.

4. The melted materials after melting are put into a water quenching pool 61 for water quenching treatment, water quenching treatment is carried out to form water quenching slag, the water quenching slag is put into a water quenching slag tank 62, and the water quenching slag is combined with engineering waste materials in an engineering waste material tank 63 and is conveyed to a lifter 41 by a belt weigher 15 and then is conveyed into a mill 7 by the lifter 41.

5. The mill 7 is connected with an exhaust pipe of the sintering furnace 4 to heat an inner cavity of the mill 7, moisture carried by water-quenched slag is dried, the mill 7 grinds the water-quenched slag and engineering waste materials, the water-quenched slag accounts for 60%, the slag accounts for 20%, the water purifying agent waste residues account for 10%, and the crystal sludge accounts for 10%, the specific surface area of the ground powder is 650 square meters/kg, dust generated in the grinding process is collected to a dust collector 45 through a dust collecting pipe 46 and then conveyed to a flue gas treatment system 47 for purification, ground finished products and ground particles collected by the dust collector 45 are conveyed to a lifter 41 through a conveyor 18, and then conveyed to a finished product tank 8 through the lifter 41 for storage.

A dust collecting pipe 46 of a dust collector 45 is arranged above equipment between the conveyor 18 below the granulator 3 and the conveyor 18 below the sintering material storage tank 42, the upper end of the dust collecting pipe 46 is connected with the dust collector 45, the dust collector 45 is externally connected with a flue gas treatment system 47, flue gas enters the flue gas treatment system 47 for purification and then is discharged, and sintering material particles collected by the dust collector 45 are returned to the sintering material storage tank 42.

Example 2

A metal sludge conversion treatment process comprises the following processing steps:

1. the method comprises the steps that dry sludge and wet sludge are respectively arranged in two sludge pools, the sludge is grabbed from a dry sludge pool 19 and a wet sludge pool 19 through a travelling grab bucket 11 and then is reamed and weighed by a reamer balance 12, the sludge is then respectively arranged in a dry sludge storage tank 13 and a wet sludge storage tank 14, the dry sludge is reamed and weighed by a belt balance 15 and then is conveyed to a mixer 2, the wet sludge is reamed and shredded by the reamer balance 12 and then is conveyed to the mixer 2, sludge additives in a sludge additive tank 17 are reamed and reamed by the reamer balance 12 and then are conveyed to the mixer 2, the dry sludge accounts for 45 percent, the wet sludge accounts for 40 percent and the sludge additives account for 15 percent, the dry sludge accounts for 15 percent, the materials are uniformly stirred in the mixer 2 and then are poured into a granulator 3 for granulation, and fluorite accounts for 12.5 percent, waste gypsum accounts for 12.5 percent, coal.

2. And conveying the mixed sludge formed after granulation and molding to a sintering furnace 4 through a conveyor 18 for sintering, wherein the sintering temperature of the sintering furnace 4 is 1150 ℃, and the sintering time is 18 hours.

3. After sintering, the mixture is conveyed to a lifting machine 41 through a conveyor 18, then conveyed to a sintering material storage tank 42 by the lifting machine 41 for storage and standby, when the next process needs to be carried out, the mixture is conveyed to a sintering material pre-discharging tank 43 by the conveyor 18, weighed by a belt scale 15 in combination with a melting additive in a melting additive tank 44, and then conveyed to a melting furnace 5 by the conveyor 18 for melting, wherein the weight of the melting additive accounts for 15% of the total melting material, the ratio of components in the melting additive is 32% of feldspar, 48% of carbide slag, 6% of barium sulfate and 14% of borax, the melting temperature is 1350 ℃, and the melting time is 1.5 hours.

4. The melted materials after melting are put into a water quenching pool 61 for water quenching treatment, water quenching treatment is carried out to form water quenching slag, the water quenching slag is put into a water quenching slag tank 62, and the water quenching slag is combined with engineering waste materials in an engineering waste material tank 63 and is conveyed to a lifter 41 by a belt weigher 15 and then is conveyed into a mill 7 by the lifter 41.

5. The mill 7 is connected with an exhaust pipe of the sintering furnace 4 to heat an inner cavity of the mill 7, moisture carried by water-quenched slag is dried, the mill 7 grinds the water-quenched slag and engineering waste materials, the water-quenched slag accounts for 70%, the slag accounts for 20%, the water purifying agent waste residues account for 5%, and the crystal sludge accounts for 5%, the specific surface area of the ground powder is 700 square meters per kilogram, dust generated in the grinding process is collected to a dust collector 45 through a dust collecting pipe 46 and then conveyed to a flue gas treatment system 47 for purification, ground finished products and ground particles collected by the dust collector 45 are conveyed to a lifter 41 through a conveyor 18, and then conveyed to a finished product tank 8 through the lifter 41 for storage.

A dust collecting pipe 46 of a dust collector 45 is arranged above equipment between the conveyor 18 below the granulator 3 and the conveyor 18 below the sintering material storage tank 42, the upper end of the dust collecting pipe 46 is connected with the dust collector 45, the dust collector 45 is externally connected with a flue gas treatment system 47, flue gas enters the flue gas treatment system 47 for purification and then is discharged, and sintering material particles collected by the dust collector 45 are returned to the sintering material storage tank 42.

The finished product is an anticorrosive high-performance concrete composite admixture, and when the admixture needs to be used, the admixture is unloaded from a finished product tank 8 onto a transport truck and then is transported to a cement plant and a concrete mixing plant for use through a transport vehicle. The admixture is suitable for industrial and civil buildings, roads, railways, ocean engineering and severe western corrosive environments, and has wide application range.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.