Waste residue harmless treatment system

Abstract

The utility model provides a waste residue harmless treatment system. The waste residue harmless treatment system comprises a pretreatment system, a calcination system, a smelting system and a flue gas purification system, the pretreatment system, the calcining system and the smelting system are sequentially connected, the pretreatment system is used for drying waste residues, the calcining system is used for reducing and calcining products obtained by the pretreatment system, and the smelting system is used for smelting and separating the products obtained by the calcining system; through the arrangement of the innocent treatment system, the system is simple in structure, nickel and cobalt metals in waste residues can be recycled under the conditions of high efficiency, energy conservation and low pollution, the waste of resources is reduced, harmlessness, reduction and resource recycling of the waste residues are realized through deep processing of the waste residues, and the system is high in safety and strong in operability.

Description

Technical Field

[0001] The present application belongs to the technical field of waste residue treatment, and specifically relates to a waste residue harmless treatment system. Background Art

[0002] Waste residues such as iron-aluminum slag and sludge slag are by-products produced during the wet preparation of ternary precursors. After testing and statistics of waste residues such as iron-aluminum slag and sludge slag, it was found that the nickel content in iron-aluminum slag is 4%-5% and the cobalt content is 0.5%-1%. The nickel content in sludge slag is about 15% and the cobalt content is about 3%. The waste residue contains a certain amount of valuable metals such as nickel and cobalt. At present, there is no better waste residue treatment and recycling system. In most cases, it is sold cheaply as waste residue or randomly piled up, causing serious waste of resources and environmental pollution. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0004] In order to solve the above problems, the present application provides a waste slag harmless treatment system, including: a pretreatment system, a calcination system, a smelting system and a flue gas purification system;

[0005] The pretreatment system, calcination system and smelting system are connected in sequence, the pretreatment system is used to dry the waste slag, the calcination system is used to perform reduction calcination on the product obtained by the pretreatment system, and the smelting system is used to perform smelting and separation on the product obtained by the calcination system;

[0006] The pretreatment system, calcination system and smelting system are respectively connected to the flue gas purification system through pipelines.

[0007] Optionally, the pretreatment system includes: a pulping tank, a filter press pump, a filter press, a first conveying member and a steam dryer;

[0008] The slurry tank is connected to the filter press through the filter press pump, and the filter press is connected to the steam dryer through the first conveying member.

[0009] Optionally, the calcining system is a rotary kiln, and a conveying system is provided between the steam dryer and the rotary kiln.

[0010] Optionally, the conveying system includes: a second conveying member, a bucket elevator and a third conveying member;

[0011] The steam dryer is connected to the bucket elevator via the second conveying member, and the bucket elevator is connected to the calcining system via the third conveying member.

[0012] Optionally, the calcining system is provided with a detector, and the detector is used to detect the carbon content in the rotary kiln.

[0013] Optionally, the first conveying member, the second conveying member and the third conveying member are all material conveying belts.

[0014] Optionally, the smelting system includes: an electric furnace, a granulation tank and a water quenching tank;

[0015] The calcining system and the electric furnace are provided with a fourth conveying member, and the electric furnace is connected with the granulation tank and the water quenching tank.

[0016] Optionally, the fourth conveying member is a material transport trolley.

[0017] Optionally, the flue gas purification system is connected to the calcining system and the electric furnace respectively through pipelines.

[0018] Optionally, the flue gas purification system includes a bag filter and a tail gas purification tower connected in sequence.

[0019] Beneficial Effects

[0020] A waste residue harmless treatment system provided in the embodiment of the utility model has a simple structure through the setting of the harmless treatment system, and can recover nickel and cobalt metals in the waste residue with high efficiency, energy saving and low pollution, thereby reducing the waste of resources. Moreover, the waste residue can be harmless, reduced and recycled through the deep processing of the waste residue, and the system has high safety and strong operability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the waste residue harmless treatment system of the utility model.

[0022] The reference numerals are:

[0023] 1. Pretreatment system; 11. Slurry tank; 12. Filter press pump; 13. Filter press; 14. First conveying member; 15. Steam dryer; 2. Calcination system; 3. Smelting system; 31. Electric furnace; 32. Granulation tank; 33. Water quenching tank; 4. Conveying system; 41. Second conveying member; 42. Bucket elevator; 43. Third conveying member; 5. Fourth conveying member. DETAILED DESCRIPTION

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] See also Figure 1 As shown, according to an embodiment of the present application, a waste slag harmless treatment system is provided, comprising: a pretreatment system 1, a calcination system 2, a smelting system 3 and a flue gas purification system;

[0029] The pretreatment system 1, the calcination system 2 and the smelting system 3 are connected in sequence, the pretreatment system 1 is used to dry the waste slag, the calcination system 2 is used to perform reduction calcination on the product obtained by the pretreatment system 1, and the smelting system 3 is used to perform smelting and separation on the product obtained by the calcination system 2;

[0030] The pretreatment system 1, the calcination system 2 and the smelting system 3 are respectively connected to the flue gas purification system through pipelines.

[0031] Specifically, the waste slag is fed into the pretreatment system 1, which performs solid-liquid separation and drying on the waste slag, and then feeds it into the calcination system 2, which performs reduction calcination on it to obtain roasted sand, and after the roasted sand is fed into the smelting system 3, the smelting system 3 can reduce the metals such as nickel and cobalt contained in the roasted sand to form nickel-cobalt products, and other oxides to form slag phase. Through the above steps, the nickel and cobalt metals in the waste slag can be recovered, the waste of resources can be reduced, and the waste slag can be harmless, reduced, and recycled through deep processing of the waste slag, which has high safety and strong operability.

[0032] During the process of recovering metals from waste slag, the dust and flue gas generated are treated by the flue gas purification system and discharged after meeting the standards, thus reducing the air pollution caused by the gases generated during production.

[0033] The pretreatment system 1 comprises: a pulping tank 11, a filter press pump 12, a filter press 13, a first conveying member 14 and a steam dryer 15;

[0034] The pulping tank 11 is connected to the filter press 13 via the filter press pump 12 , and the filter press 13 is connected to the steam dryer 15 via the first conveying member 14 .

[0035] Specifically, after the waste residue is fed into the pulping tank 11, the pulping tank 11 can mix the waste residue with the liquid, and stir, grind and disperse the waste residue and the liquid through mechanical or physical forces, so that the dispersed solid matter of the waste residue is evenly dispersed in the liquid, and then the waste residue is fed into the filter press 13 through the filter press pump 12. The filter press 13 performs fixed liquid separation on the waste residue discharged from the pulping tank 11 to dehydrate the dispersed solid matter of the waste residue, and then the waste residue is fed into the steam dryer 15 through the first conveying member 14, and the steam dryer 15 can heat and dry the waste residue.

[0036] The calcining system 2 is a rotary kiln, and a conveying system 4 is provided between the steam dryer 15 and the rotary kiln.

[0037] The calcining system 2 is provided with a detector, and the detector is used to detect the carbon content in the rotary kiln.

[0038] Specifically, the dispersed solid waste matter is dried by a steam dryer 15 and then fed into a calcination system 2 through a conveying system 4. The calcination system 2 is a rotary kiln, and the dried solid waste matter is reduced and calcined in the rotary kiln to obtain roasted sand. In order to ensure the reduction and calcination effect of the solid waste matter, a detector is installed on the rotary kiln, which can monitor the carbon content in the rotary kiln in real time. When the rotary kiln reduces and calcines the solid waste matter, the carbon content in the rotary kiln is about 5%.

[0039] The conveying system 4 includes: a second conveying member 41, a bucket elevator 42 and a third conveying member 43;

[0040] The steam dryer 15 is connected to the bucket elevator 42 via the second conveying member 41 , and the bucket elevator 42 is connected to the calcining system 2 via the third conveying member 43 .

[0041] Specifically, the conveying system 4 includes a second conveying member 41, a bucket elevator 42 and a third conveying member 43. Through the setting of the conveying system 4, the material discharged from the steam dryer 15 can be lifted and fed into the rotary kiln, and the feeding stability is higher. At the same time, auxiliary materials are added when the material enters the third conveying member 43. The auxiliary materials are lignite or activated carbon, which can improve the reduction roasting efficiency of the material entering the calcining system 2.

[0042] The first conveying member 14 , the second conveying member 41 and the third conveying member 43 are all material conveying belts.

[0043] The smelting system 3 includes: an electric furnace 31, a granulation tank 32 and a water quenching tank 33;

[0044] The calcining system 2 and the electric furnace 31 are provided with a fourth conveying member 5 , and the electric furnace 31 is connected to the granulation tank 32 and the water quenching tank 33 .

[0045] The fourth conveying member 5 is a material transporting trolley.

[0046] Specifically, the roasted sand produced by the calcining system 2 is fed into the electric furnace 31 through the fourth conveyor 5. The electric furnace 31 melts the roasted sand. The upper slag phase in the electric furnace 31 is water-extracted to obtain water-quenched slag and the lower nickel matte is granulated to obtain nickel-cobalt products, thereby realizing effective recovery of metals in the waste slag.

[0047] The granulation tank 32 and the water quenching tank 33 are both connected to the heat exchanger through pipelines, so that a large amount of water mist and water mist gas generated during production can pass through the heat exchanger to recycle the heat.

[0048] The flue gas purification system is connected to the calcining system 2 and the electric furnace 31 through pipelines.

[0049] The flue gas purification system comprises a bag filter and a tail gas purification tower which are connected in sequence.

[0050] Specifically, the flue gas generated in the production of the electromechanical furnace 31 of the calcining system 2 can be fed into the flue gas purification system through a pipeline, and purified by a bag filter and an exhaust gas purification tower, and then discharged into the atmosphere after being treated to meet the standards, so as to avoid air pollution.

[0051] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A waste residue harmless treatment system, characterized in that: include: Pretreatment system (1), calcination system (2), smelting system (3) and flue gas purification system; The pretreatment system (1), the calcination system (2) and the smelting system (3) are connected in sequence, the pretreatment system (1) is used to dry the waste slag, the calcination system (2) is used to perform reduction calcination on the product obtained by the pretreatment system (1), and the smelting system (3) is used to perform smelting and separation on the product obtained by the calcination system (2); The pretreatment system (1), the calcination system (2) and the smelting system (3) are respectively connected to the flue gas purification system through pipelines.

2. The waste residue harmless treatment system according to claim 1, characterized in that: The pretreatment system (1) comprises: a pulping tank (11), a filter press pump (12), a filter press (13), a first conveying member (14) and a steam dryer (15); The pulping tank (11) is connected to the filter press (13) via the filter press pump (12), and the filter press (13) is connected to the steam dryer (15) via the first conveying member (14).

3. The waste residue harmless treatment system according to claim 2 is characterized in that: The calcining system (2) is a rotary kiln, and a conveying system (4) is provided between the steam dryer (15) and the rotary kiln.

4. The waste residue harmless treatment system according to claim 3 is characterized in that: The conveying system (4) comprises: a second conveying member (41), a bucket elevator (42) and a third conveying member (43); The steam dryer (15) is connected to the bucket elevator (42) via the second conveying member (41), and the bucket elevator (42) is connected to the calcining system (2) via the third conveying member (43).

5. The waste residue harmless treatment system according to claim 4, characterized in that: The calcining system (2) is provided with a detector, and the detector is used to detect the carbon content in the rotary kiln.

6. The waste residue harmless treatment system according to claim 5, characterized in that: The first conveying member (14), the second conveying member (41) and the third conveying member (43) are all material conveying belts.

7. The waste residue harmless treatment system according to claim 6, characterized in that: The smelting system (3) comprises: an electric furnace (31), a granulation tank (32) and a water quenching tank (33); The calcining system (2) and the electric furnace (31) are provided with a fourth conveying member (5), and the electric furnace (31) is connected to the granulation tank (32) and the water quenching tank (33).

8. The waste residue harmless treatment system according to claim 7, characterized in that: The fourth conveying member (5) is a material transporting trolley.

9. The waste residue harmless treatment system according to claim 8, characterized in that: The flue gas purification system is connected to the calcining system (2) and the electric furnace (31) respectively through pipelines.

10. The waste residue harmless treatment system according to claim 9, characterized in that: The flue gas purification system comprises a bag filter and a tail gas purification tower which are connected in sequence.

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