Sorting system for carbon and water removal filter cake

Abstract

The utility model relates to solid waste resource utilization technical field provides a kind of sorting system of carbon extraction dewatering filter cake, comprising: agitator device, for the mixture of sweep selection concentrate liquid, flotation steam and slurry mixture is mixed and refined to form agitator ore liquid;Slurry mixture is the slurry mixture of dewatering filter cake and water;Flotation device, connected with agitator device, for first sorting agitator ore liquid to obtain sorting concentrate liquid and sorting tailing liquid, and secondary sweep selection sorting concentrate liquid to obtain sweep selection concentrate liquid and sweep selection tailing liquid, and sweep selection concentrate liquid is transported to agitator device;Heating device, connected with agitator device, for heating flotation reagent to first temperature becomes flotation steam, and flotation steam is sent into agitator device;Filter-pressing device, connected with flotation device, for dewatering sorting concentrate liquid to obtain concentrate product, and dewatering sweep selection tailing liquid to obtain tailing product. Solve the problem that residual carbon particles in dewatering filter cake produced after gasification slag sorting in prior art are difficult to obtain.

Description

Technical Field

[0001] This utility model relates to the field of solid waste resource utilization technology, specifically to a sorting system for carbon extraction and dehydration filter cake. Background Technology

[0002] Coal gasification slag is a byproduct of the coal gasification process. It is usually divided into coarse slag and fine slag. The gasification slag contains a certain amount of residual carbon. At present, industrial production mainly uses physical carbon extraction processes for sorting and recovery to obtain three products: refined carbon, tailings, and dewatered filter cake. Currently, the main equipment used for physical separation of gasification slag is either spiral separator + vibrating screen grading + centrifuge dewatering or TBS disturbed bed + spiral separator + vibrating screen grading + centrifuge dewatering. Regardless of the type of separation equipment used, there is a certain lower limit to separation. For physical separation of coal gasification slag, this lower limit is usually 100μm. That is, materials larger than 100μm can achieve effective carbon and ash separation. However, materials smaller than 100μm have a small particle size, and the separation effect based on density is not obvious. Physical separation cannot play a role in separating the particles. In the end, they can only be discharged in the form of filter cake after dewatering. This dewatered filter cake usually accounts for more than 50% of the raw material by mass and still contains a certain amount of residual carbon particles. However, due to the high moisture content and low calorific value of the filter cake, gasification slag physical separation companies cannot sell it as a valuable product. Currently, it is mainly disposed of in landfills, resulting in waste of resources and environmental pollution.

[0003] Flotation is an effective method for separating and classifying fine-grained minerals. However, due to the strong hydrophilicity of the gasification slag surface, the consumption of flotation reagents is high, resulting in low flotation recovery rates. Conventional flotation processes also struggle to extract residual carbon particles from the dewatered filter cake. Therefore, there is an urgent need for a device to solve at least one of these problems. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a sorting system for carbon extraction and dehydration filter cake, which solves the problem in the prior art that it is difficult to obtain residual carbon particles in the dehydration filter cake generated after gasification slag sorting.

[0005] To achieve the above objectives, this utility model provides a sorting system for carbon extraction and dehydration filter cake, the sorting system comprising:

[0006] A slurry preparation device is used to mix and refine scavenging concentrate, flotation steam, and slurry mixture to form a slurry preparation solution; the slurry mixture is a mixture of dewatered filter cake and water.

[0007] The flotation unit, connected to the slurry preparation unit, is used for primary separation of the slurry to obtain separation concentrate and separation tailings, and secondary scavenging of the separation concentrate to obtain scavenging concentrate and scavenging tailings, and conveys the scavenging concentrate to the slurry preparation unit.

[0008] A heating device, connected to a slurry preparation device, is used to heat the flotation reagent to a first temperature to become flotation steam, and to send the flotation steam into the slurry preparation device.

[0009] A filter press, connected to a flotation unit, is used to dewater the separation concentrate to obtain concentrate products, and to dewater the scavenging tailings to obtain tailings products.

[0010] Specifically, the flotation device includes:

[0011] A primary flotation column, connected to a slurry preparation device, is used for the initial separation of the slurry from the slurry preparation device to obtain a separation concentrate and a separation tailings.

[0012] The secondary flotation column is connected to the primary flotation column and the slurry conditioning device. It is used for secondary scavenging of the tailings liquor from the primary flotation column to obtain scavenged concentrate and scavenged tailings liquor, and to deliver the scavenged concentrate to the slurry conditioning device.

[0013] Specifically, the secondary flotation column includes multiple bubble generators;

[0014] The heating device is also connected to one of the bubble generators in the secondary flotation column. The bubble generator connected to the heating device is used to generate bubbles from the flotation steam fed into the secondary flotation column by the heating device.

[0015] Specifically, the heating device includes: a plurality of tubular heaters connected in sequence;

[0016] Each tubular heater has an inlet and an outlet. The outlet of one tubular heater is connected to the inlet of its adjacent tubular heater, the reagent inlet of the slurry preparation device, and the bubble generator connected to the secondary flotation column. The flotation reagent enters the tubular heater through the inlet, is heated, and then flows out of the tubular heater through the outlet. It is heated to the first temperature through multiple tubular heaters connected in sequence.

[0017] Specifically, the heating device further includes: a plurality of support bases, each tubular heater being supported by at least one support base.

[0018] Specifically, each support base includes: a fixed bracket, a movable bracket, and a semi-hoop;

[0019] The movable support has an arc-shaped end that fits the shape of the tubular heater. The support end is used to support the tubular heater, and the movable end of the movable support is movably connected to the fixed support.

[0020] The semi-hoop is set at the supporting end of the movable support to form a housing area for the tubular heater;

[0021] The fixed support is provided with a guide hole, and the movable end of the movable support is set in the guide hole and can move within the guide hole.

[0022] Specifically, each support base also includes an elastic support member disposed between the bottom of the guide hole and the movable support.

[0023] Specifically, each support base also includes: a transmission assembly;

[0024] The transmission components include a transmission rack, transmission gears, transmission shaft, and transmission handle;

[0025] The transmission rack is located at the movable end of the movable support;

[0026] One end of the drive shaft extends into the guide hole, while the other end is exposed outside the guide hole;

[0027] The transmission gear is fitted onto one end of the transmission shaft that extends into the guide hole and meshes with the transmission rack.

[0028] The transmission handle is located at the end of the transmission shaft exposed outside the guide hole. By operating the transmission handle, the transmission shaft is driven to rotate, which in turn drives the transmission gear to rotate. The transmission rack that meshes with the transmission gear then drives the movable end of the movable support to move within the guide hole.

[0029] Specifically, the filter press device includes: a first filter press and a second filter press;

[0030] The first filter press is connected to a primary flotation column and is used to dewater the separation concentrate to obtain concentrate products.

[0031] The second filter press is connected to the secondary flotation column and is used to dewater and scaveng the tailings liquid to obtain tailings products.

[0032] Specifically, the sorting system further includes: a stirring device connected to the slurry preparation device, used to mix and stir the dewatered filter cake and water to form a slurry mixture, and to send the slurry mixture into the slurry preparation device.

[0033] The carbon extraction and dewatering filter cake separation system provided by this utility model refines the scavenging concentrate, flotation steam, and slurry mixture into a slurry mixture through a slurry preparation device. The slurry mixture is made by mixing dewatered filter cake and water. The flotation steam entering the slurry preparation device is generated by heating flotation reagents through a heating device. The flotation steam generated by heating the flotation reagents can form an oil film on the surface of residual carbon particles in the slurry mixture, thereby enhancing the hydrophobicity of the residual carbon particle surface. Afterwards, the slurry mixture enters the flotation device for separation and scavenging treatment. Due to the flotation steam adhering to the surface of the residual carbon particles, the residual carbon particles can float to the surface more effectively, while impurities in the dewatered filter cake sink to the bottom of the flotation device. This process allows for better removal of residual carbon particles from the dewatered filter cake. After the slurry is processed by the flotation unit, it yields a separation concentrate and a separation tailings solution. The separation concentrate, which contains a high amount of residual carbon particles, is dewatered by the filter press to become a concentrate product. The separation tailings solution is then processed by scavenging to obtain a scavenged concentrate and a scavenged tailings solution. The scavenged concentrate still contains a small amount of residual carbon particles. To better recover the residual carbon particles in the scavenged concentrate, it is sent back to the slurry processing unit and then back to the flotation unit for separation and scavenging, thus better removing the residual carbon particles from the dewatered filter cake. The scavenged tailings solution is then dewatered by the filter press to obtain a tailings product.

[0034] The carbon extraction and dewatering filter cake sorting system provided by this utility model generates flotation steam by heating flotation reagents, thereby better forming an oil film on the surface of residual carbon particles in the dewatering filter cake, enhancing the hydrophobicity of the residual carbon particle surface, and making it easier to obtain residual carbon particles in the dewatering filter cake in subsequent processes. This solves the problem in the prior art that it is difficult to obtain residual carbon particles in the dewatering filter cake generated after gasification slag sorting.

[0035] Other features and advantages of this utility model embodiment will be described in detail in the following detailed description section. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a schematic diagram of the layout of the sorting system for carbon extraction and dehydration filter cake provided by this utility model;

[0038] Figure 2 A schematic diagram of the heating device in the sorting system for carbon extraction and dehydration filter cake provided by this utility model;

[0039] Figure 3This is a schematic diagram of the structure of the support base in the sorting system for carbon extraction and dehydration filter cake provided by this utility model;

[0040] Figure 4 This is an exploded view of the support base in the sorting system for carbon extraction and dehydration filter cake provided by this utility model;

[0041] Figure 5 This is a partial cross-sectional view of the support base in the sorting system for carbon extraction and dehydration filter cake provided by this utility model.

[0042] Explanation of reference numerals in the attached figures

[0043] 1-Pulp preparation device; 2-Flotation device; 3-Heating device; 4-Filter press device; 5-Agitator device; 6-Collector tank; 7-Frother tank; 21-Primary flotation column; 22-Secondary flotation column; 23-Bubble generator; 31-Tube heater; 32-Support base; 33-Transmission assembly; 320-Guide hole; 321-Fixed support; 322-Modible support; 323-Half hoop; 324-Elastic support; 331-Transmission rack; 332-Transmission gear; 333-Transmission shaft; 334-Transmission handle; 41-First filter press; 42-Second filter press. Detailed Implementation

[0044] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0045] Figure 1 This is a schematic diagram of the layout of the sorting system for carbon extraction and dehydration filter cake; Figure 2 A schematic diagram of the heating device in the sorting system for carbon extraction and dehydration filter cake; Figure 3 This is a schematic diagram of the support base in the sorting system for carbon extraction and dehydration filter cake; Figure 4 This is an exploded schematic diagram of the support base in the sorting system for carbon extraction and dehydration filter cake; Figure 5 This is a partial sectional view of the support base in the sorting system for carbon extraction and dewatering filter cake. (Example:) Figures 1-5 As shown, this utility model provides a sorting system for carbon extraction and dehydration filter cake, the sorting system comprising:

[0046] Slurry preparation device 1 is used to mix and refine scavenging concentrate, flotation steam and slurry mixture to form slurry preparation solution; the slurry mixture is a slurry mixture of dewatered filter cake and water;

[0047] Flotation device 2, connected to slurry preparation device 1, is used for primary separation of slurry preparation solution to obtain separation concentrate solution and separation tailings solution, and secondary scavenging separation of slurry solution to obtain scavenging concentrate solution and scavenging tailings solution, and conveys scavenging concentrate solution to slurry preparation device 1.

[0048] Heating device 3 is connected to slurry preparation device 1 and is used to heat flotation reagent to a first temperature to become flotation steam, and send the flotation steam into slurry preparation device 1.

[0049] The filter press 4 is connected to the flotation device 2 and is used to dewater the separation concentrate to obtain concentrate products and to dewater the scavenging tailings to obtain tailings products.

[0050] The carbon extraction and dewatering filter cake separation system provided by this utility model includes a slurry preparation device 1 containing a mixture of scavenging concentrate, flotation steam, and slurry. The slurry mixture is formed by mixing the dewatered filter cake with water. In addition to impurities, the dewatered filter cake contains residual carbon particles. Therefore, the slurry mixture includes water, residual carbon particles, and impurities. The slurry preparation device 1 is a high-shear slurry preparer. The shear force generated by the slurry preparation device 1 mixes and refines the scavenging concentrate, flotation steam, and slurry mixture to form a prepared slurry. The prepared slurry, after being processed by the slurry preparation device 1, has a higher particle dispersion, which facilitates better adsorption of flotation steam onto the surface of residual carbon particles, forming an oil film on the surface of the residual carbon particles. This enhances the hydrophobicity and floatability of the residual carbon particles, improving subsequent flotation efficiency and quality. Furthermore, the flotation steam, after being heated by the flotation reagents by the heating device 3, has higher activity and can better adsorb onto the surface of residual carbon particles. The prepared slurry, after being discharged from the slurry preparation device 1, enters the flotation device 2. In flotation unit 2, the slurry is subjected to separation and scavenging processes. After separation, a separation concentrate and a separation tailings are obtained. The separation concentrate, containing a large amount of residual carbon particles, is sent to a filter press 4 connected to flotation unit 2 for dewatering to obtain a concentrate product. The separation tailings, containing a large amount of impurity particles and a small amount of residual carbon particles, are then scavenged in flotation unit 2 to obtain a scavenging concentrate and a scavenging tailings. The separation tailings then enter the filter press 4 for further processing. After dewatering, tailings products are obtained. In order to extract a small amount of residual carbon particles from the scavenging concentrate, the scavenging concentrate is sent back to the slurry conditioning device 1. The scavenging concentrate, slurry mixture and flotation steam are mixed and refined to form a slurry, which is then sent back to the flotation device 2. In this way, the scavenging concentrate is separated and scavenged again in the flotation device 2 to better extract residual carbon particles. This solves the problem in the existing technology that it is difficult to obtain residual carbon particles in the dewatered filter cake generated after the gasification slag separation.

[0051] Flotation reagents typically include collectors, frothers, and modifiers. In this application, a collector tank 6 is provided to store the collector, and a frother tank 7 is provided to store the frother. Both the collector tank 6 and the frother tank 7 are connected to a heating device 3. A fixed amount of collector is discharged from the collector tank 6, heated by the heating device 3, and then enters the slurry conditioning device 1. A fixed amount of frother is discharged from the frother tank 7, heated by the heating device 3, and then enters the slurry conditioning device 1. The collector can be diesel fuel, and the frother can be 2-octanol. The collector and frother, as flotation reagents, are heated to a first temperature in the heating device 1, which is between 200°C and 300°C. The collector and frother are heated by the heating device 3 to become flotation steam, which enters the slurry conditioning device 1 to better adhere to the surface of residual carbon particles and form an oil film.

[0052] In one embodiment, for the purpose of sorting and scavenging the slurry, such as... Figure 1 As shown, the flotation device 2 includes:

[0053] A primary flotation column 21 is connected to a slurry preparation device 1 and is used for the initial separation of the slurry from the slurry preparation device 1 to obtain a separation concentrate and a separation tailings.

[0054] The secondary flotation column 22 is connected to the primary flotation column 21 and the slurry preparation device 1. It is used for secondary scavenging of the tailings liquid from the primary flotation column 21 to obtain scavenged concentrate and scavenged tailings liquid, and to transport the scavenged concentrate to the slurry preparation device 1.

[0055] The primary flotation column 21 is connected to the slurry conditioning device 1. The slurry first enters the primary flotation column 21, where it undergoes roughing to obtain a separation concentrate and a separation tailings. The separation concentrate, containing a large amount of residual carbon particles, is directly sent to the filter press 4 for dewatering to obtain the concentrate product. The primary flotation column 21 cannot remove all the residual carbon particles from the slurry; a small amount remains mixed in the separation tailings. To better remove these residual carbon particles, the separation tailings are sent to the secondary flotation column 22. The secondary flotation column 22 scavenges the separation tailings, thus performing secondary treatment on the slurry. The separation tailings are then... After scavenging, scavenging concentrate and scavenging tailings are obtained. At this time, residual carbon particles in the tailings are mixed in the scavenging concentrate, while impurity particles are mixed in the tailings. The scavenging tailings are sent to the filter press 4 for dewatering to obtain tailings products. In order to obtain residual carbon particles in the scavenging concentrate, the scavenging concentrate discharged from the secondary flotation column 22 is sent back to the slurry conditioning device 1. The scavenging concentrate, slurry mixture and flotation steam are mixed again to form a slurry conditioning solution. Then, it is separated and scavenged sequentially through the primary flotation column 21 and the secondary flotation column 22. In this way, residual carbon particles can be better obtained, the carbon extraction effect of the dewatered filter cake can be improved, and energy waste can be reduced.

[0056] After the sorting concentrate enters the secondary flotation column 22, in order to better obtain the residual carbon particles in the sorting concentrate, the secondary flotation column 22 includes multiple bubble generators 23;

[0057] The heating device 3 is also connected to one of the bubble generators 23 in the secondary flotation column 22. The bubble generator 23 connected to the heating device 3 is used to generate bubbles from the flotation steam fed into the secondary flotation column 22 by the heating device 3.

[0058] The flotation steam generated by heating the flotation reagent by the heating device 3 is sent into the secondary flotation column 22 through a bubble generator 23. The bubble generator 23 causes the flotation steam entering the secondary flotation column 22 to generate a strong shearing force, which enables the flotation steam entering the secondary flotation column 22 to become bubbles and mix with the residual carbon particles by jet, thereby enhancing the mixing effect of flotation steam and residual carbon particles. The residual carbon particles mixed with flotation steam can float better on the water surface, so that the residual carbon particles can be obtained during the scavenging process.

[0059] In order to better heat the flotation reagent to the first temperature, the heating device 3 includes: a plurality of tubular heaters 31 connected in sequence;

[0060] Each tubular heater 31 has an inlet and an outlet. The outlet of one tubular heater 31 is connected to the inlet of its adjacent tubular heater 31, the reagent inlet of the slurry preparation device 1, and the steam inlet of the bubble generator 23 connected to the secondary flotation column 22. The flotation reagent enters from the inlet of the tubular heater 31, is heated, and then flows out from the outlet of the tubular heater 31. It is heated to the first temperature step by step through multiple tubular heaters 31 connected in sequence.

[0061] In one embodiment, such as Figure 2 As shown, three tubular heaters 31 are connected in sequence. The outlet of the first tubular heater 31 is connected to the inlet of the second tubular heater 31, the reagent inlet of the slurry preparation device 1, and the steam inlet of one bubble generator 23 of the secondary flotation column 22. The outlet of the second tubular heater 31 is connected to the inlet of the third tubular heater 31, the reagent inlet of the slurry preparation device 1, and the steam inlet of one bubble generator 23 of the secondary flotation column 22. The outlet of the third tubular heater 31 is connected to the reagent inlet of the slurry preparation device 1 and the steam inlet of one bubble generator 23 of the secondary flotation column 22. The flotation reagent enters from the inlet of the first tubular heater 31, heating the flotation reagent stage by stage. After each stage of heating the flotation reagent, flotation steam at different temperatures can be sent to the slurry preparation device 1 and / or one bubble generator 23 of the secondary flotation column 22 as needed, thereby improving the flexibility of the heating device 3.

[0062] In order to control the temperature of the flotation reagent discharged from the outlet of each stage tubular heater 31, a temperature measuring instrument is installed at the outlet of each stage tubular heater 31 to detect the temperature of the flotation reagent discharged from the outlet, so as to facilitate the delivery of the flotation steam generated after heating to the designated device as needed.

[0063] In order for the tubular heater 31 to operate stably, such as Figures 2-5 As shown, the heating device 3 further includes: a plurality of support bases 32, each tubular heater 31 being supported by at least one support base 32.

[0064] Each support base 32 includes: a fixed support 321, a movable support 322, and a semi-hoop 323;

[0065] The supporting end of the movable support 322 has an arc-shaped portion that fits the shape of the tubular heater 31. The supporting end is used to support the tubular heater 31. The movable end of the movable support 322 is movably connected to the fixed support 321.

[0066] The semi-hoop 323 is set at the supporting end of the movable support 322 to form the receiving area for the tubular heater 31;

[0067] The fixed support 321 is provided with a guide hole 320, and the movable end of the movable support 322 is located in the guide hole 320 and can move within the guide hole 320.

[0068] Each support base 32 also includes an elastic support 324, disposed between the bottom of the guide hole 320 and the movable support 322.

[0069] Each support base 32 also includes: a transmission assembly 33;

[0070] The transmission assembly 33 includes a transmission rack 331, a transmission gear 332, a transmission shaft 333, and a transmission handle 334;

[0071] The transmission rack 331 is located at the movable end of the movable support 322;

[0072] One end of the drive shaft 333 extends into the guide hole 320, while the other end is exposed outside the guide hole 320;

[0073] The transmission gear 332 is mounted on one end of the transmission shaft 333, which extends into the guide hole 320 and meshes with the transmission rack 331.

[0074] The transmission handle 334 is located at the end of the transmission shaft 333 exposed outside the guide hole 320. By operating the transmission handle 334, the transmission shaft 333 is driven to rotate, which in turn drives the transmission gear 332 to rotate. The transmission rack 331, which meshes with the transmission gear 332, then drives the movable end of the movable support 322 to move within the guide hole 320.

[0075] like Figure 2 As shown, each tubular heater 31 is supported by two support bases 32. To facilitate adjustment of the height of the support bases 32 and ensure that the support bases 32 can support the tubular heater 31 on the same horizontal plane, the fixed support 321 and the movable support 322 of the support base 32 are movably connected. The movable end of the movable support 322 is movably disposed in the guide hole 320 opened on the fixed support 321. The arc-shaped part of the supporting end of the movable support 322 supports the tubular heater 31. To prevent the tubular heater 31 from detaching from the supporting end of the movable support 322, a half-hoop 323 is provided and connected to the supporting end. In this way, the half-hoop 323 and the arc-shaped part of the supporting end form a receiving area to fix the tubular heater 31 and prevent the tubular heater 31 from falling off the supporting end of the movable support 322. The movable end of the movable support 322 slides in the guide hole 320. When the movable end slides in the guide hole 320, the support height of the support base 32 can be adjusted. By adjusting the height of the support base 32, the tubular heater 31 can be ensured to be on the same horizontal plane.

[0076] To facilitate adjustment of the support height of the support base 32, such as Figures 3-5 As shown, a U-shaped through groove is formed at the movable end of the movable support 322. A transmission rack 331 is set on one side of the groove wall. One end of the transmission shaft 333 extends into the guide hole 320, and a transmission gear 332 is set on the end of the transmission shaft 333 that extends into the guide hole 320 to mesh with the transmission rack 331. A transmission handle 334 is installed on the end of the transmission shaft 333 that is exposed outside the guide hole 320. By operating the transmission handle 334, the transmission shaft 333 is driven to rotate, thereby driving the transmission gear 332 to rotate, and thus engaging with the transmission rack 331. The meshing transmission rack 331 moves, and the movable end of the movable support 322 moves within the guide hole 320, thereby adjusting the support height of the support base 32. To prevent the movable end of the movable support 322 from hitting the bottom of the guide hole 320, an elastic support 324 is provided between the bottom of the guide hole 320 and the end face of the movable end of the movable support 322. The elastic support 324 is a spring, a rubber pad, or a rubber airbag. The elastic support 324 provides buffering between the movable end of the movable support 322 and the bottom of the guide hole 320.

[0077] In order to dewater the sorting concentrate and the scavenging tailings liquid respectively, the filter press 4 includes: a first filter press 41 and a second filter press 42;

[0078] The first filter press 41 is connected to the primary flotation column 21 and is used to dewater the separation concentrate to obtain concentrate products;

[0079] The second filter press 42 is connected to the secondary flotation column 22 and is used to dewater and scaveng the tailings liquid to obtain tailings products.

[0080] The first filter press 41 is an ultra-high pressure filter press. The pressing pressure of the first filter press 41 is set to 8 MPa. In this way, the concentrate liquid discharged from the primary flotation column 21 is dewatered under high pressing pressure to obtain concentrate product. The second filter press 42 is a diaphragm plate and frame filter press. The scavenging tailings liquid enters the second filter press 42 and is dewatered to obtain tailings product.

[0081] In order to better mix the dehydrated filter cake and water to form a slurry mixture, the sorting system further includes: a stirring device 5, which is connected to the slurry preparation device 1, for mixing and stirring the dehydrated filter cake and water to form a slurry mixture, and sending the slurry mixture into the slurry preparation device 1.

[0082] First, the dewatered filter cake and water are fed into the mixing device 5. The mixing device 5 stirs the dewatered filter cake and water to form a slurry mixture, which is then fed into the slurry preparation device 1. The mixing device 5 includes a mixing tank, a stirring rod, stirring blades, and a stirring driver. The dewatered filter cake and water enter the mixing tank. The stirring blades are mounted on the stirring rod, and the rod body is movably connected to the mixing tank. One end of the stirring rod with stirring blades extends into the mixing tank, and the other end is connected to the stirring driver. The stirring driver drives the stirring rod to rotate, thereby causing the stirring blades to stir and mix the dewatered filter cake and water to form a slurry mixture.

[0083] The carbon extraction and dewatering filter cake separation system provided by this utility model refines the scavenging concentrate, flotation steam, and slurry mixture into a slurry mixture through a slurry preparation device. The slurry mixture is made by mixing dewatered filter cake and water. The flotation steam entering the slurry preparation device is generated by heating flotation reagents through a heating device. The flotation steam generated by heating the flotation reagents can form an oil film on the surface of residual carbon particles in the slurry mixture, thereby enhancing the hydrophobicity of the residual carbon particle surface. Afterwards, the slurry mixture enters the flotation device for separation and scavenging treatment. Due to the flotation steam adhering to the surface of the residual carbon particles, the residual carbon particles can float to the surface more effectively, while impurities in the dewatered filter cake sink to the bottom of the flotation device. This process allows for better removal of residual carbon particles from the dewatered filter cake. After the slurry is processed by the flotation unit, it yields a separation concentrate and a separation tailings solution. The separation concentrate, which contains a high amount of residual carbon particles, is dewatered by the filter press to become a concentrate product. The separation tailings solution is then processed by scavenging to obtain a scavenged concentrate and a scavenged tailings solution. The scavenged concentrate still contains a small amount of residual carbon particles. To better recover the residual carbon particles in the scavenged concentrate, it is sent back to the slurry processing unit and then back to the flotation unit for separation and scavenging, thus better removing the residual carbon particles from the dewatered filter cake. The scavenged tailings solution is then dewatered by the filter press to obtain a tailings product.

[0084] The carbon extraction and dewatering filter cake sorting system provided by this utility model generates flotation steam by heating flotation reagents, thereby better forming an oil film on the surface of residual carbon particles in the dewatering filter cake, enhancing the hydrophobicity of the residual carbon particle surface, and making it easier to obtain residual carbon particles in the dewatering filter cake in subsequent processes. This solves the problem in the prior art that it is difficult to obtain residual carbon particles in the dewatering filter cake generated after gasification slag sorting.

[0085] The optional embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solutions of the present utility model, and these simple modifications all fall within the protection scope of the present utility model.

[0086] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the various possible combinations will not be described separately in this embodiment.

[0087] Furthermore, various different implementation methods of this utility model can be arbitrarily combined, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A sorting system for carbon extraction and dehydration filter cake, characterized in that, The sorting system for the carbon extraction and dehydration filter cake includes: The slurry preparation device (1) is used to mix and refine the scavenging concentrate, flotation steam and slurry mixture to form a slurry preparation solution; the slurry mixture is a slurry mixture of dewatered filter cake and water; The flotation device (2) is connected to the slurry preparation device (1) for primary separation of slurry preparation solution to obtain separation concentrate solution and separation tailings solution, and secondary scavenging separation of slurry solution to obtain scavenging concentrate solution and scavenging tailings solution, and conveying the scavenging concentrate solution to the slurry preparation device (1). The heating device (3) is connected to the slurry preparation device (1) and is used to heat the flotation reagent to a first temperature to become flotation steam and send the flotation steam into the slurry preparation device (1). The filter press (4) is connected to the flotation device (2) for dewatering the concentrate to obtain concentrate products and dewatering the tailings to obtain tailings products.

2. The sorting system for carbon extraction and dehydration filter cake according to claim 1, characterized in that, The flotation device (2) includes: A primary flotation column (21) is connected to a slurry preparation device (1) for the initial separation of the slurry from the slurry preparation device (1) to obtain a separation concentrate and a separation tailings. The secondary flotation column (22) is connected to the primary flotation column (21) and the slurry preparation device (1) for secondary scavenging of the tailings liquid from the primary flotation column (21) to obtain scavenged concentrate and scavenged tailings liquid, and to supply the scavenged concentrate to the slurry preparation device (1).

3. The sorting system for carbon extraction and dehydration filter cake according to claim 2, characterized in that, The secondary flotation column (22) includes multiple bubble generators (23); The heating device (3) is also connected to one of the bubble generators (23) of the secondary flotation column (22), and the bubble generator (23) connected to the heating device (3) is used to generate bubbles from the flotation steam fed into the secondary flotation column (22) by the heating device (3).

4. The sorting system for carbon extraction and dehydration filter cake according to claim 3, characterized in that, The heating device (3) includes: a plurality of tubular heaters (31) connected in sequence; Each tubular heater (31) has an inlet and an outlet. The outlet of one tubular heater (31) is connected to the inlet of the adjacent tubular heater (31), the reagent inlet of the slurry preparation device (1), and the steam inlet of the bubble generator (23) connected to the secondary flotation column (22). The flotation reagent enters from the inlet of the tubular heater (31) and is heated before flowing out from the outlet of the tubular heater (31). It is heated to the first temperature step by step through multiple tubular heaters (31) connected in sequence.

5. The sorting system for carbon extraction and dehydration filter cake according to claim 4, characterized in that, The heating device (3) further includes: a plurality of support bases (32), each tubular heater (31) being supported by at least one support base (32).

6. The sorting system for carbon extraction and dehydration filter cake according to claim 5, characterized in that, Each support base (32) includes: a fixed bracket (321), a movable bracket (322), and a half hoop (323); The supporting end of the movable support (322) has an arc-shaped part that fits the shape of the tubular heater (31). The supporting end is used to support the tubular heater (31). The movable end of the movable support (322) is movably connected to the fixed support (321). The semi-hoop (323) is set at the supporting end of the movable support (322) to form the receiving area for the tubular heater (31); The fixed support (321) is provided with a guide hole (320), and the movable end of the movable support (322) is located in the guide hole (320) and can move within the guide hole (320).

7. The sorting system for carbon extraction and dehydration filter cake according to claim 6, characterized in that, Each support base (32) also includes an elastic support (324) disposed between the bottom of the guide hole (320) and the movable support (322).

8. The sorting system for carbon extraction and dehydration filter cake according to claim 7, characterized in that, Each support base (32) also includes: a transmission assembly (33); The transmission assembly (33) includes: a transmission rack (331), a transmission gear (332), a transmission shaft (333), and a transmission handle (334). The transmission rack (331) is located at the movable end of the movable support (322); One end of the drive shaft (333) extends into the guide hole (320), and the other end is exposed outside the guide hole (320); The transmission gear (332) is mounted on one end of the transmission shaft (333) that extends into the guide hole (320) and meshes with the transmission rack (331); The transmission handle (334) is located at the end of the transmission shaft (333) exposed outside the guide hole (320). By operating the transmission handle (334), the transmission shaft (333) is driven to rotate, which in turn drives the transmission gear (332) to rotate. The transmission rack (331) meshing with the transmission gear (332) then drives the movable end of the movable support (322) to move within the guide hole (320).

9. The sorting system for carbon extraction and dehydration filter cake according to claim 2, characterized in that, The filter press device (4) includes: a first filter press (41) and a second filter press (42); The first filter press (41) is connected to the primary flotation column (21) for dewatering the separation concentrate to obtain concentrate products; The second filter press (42) is connected to the secondary flotation column (22) for dewatering and scavenging tailings liquid to obtain tailings products.

10. The sorting system for carbon extraction and dehydration filter cake according to claim 1, characterized in that, The sorting system further includes a stirring device (5), which is connected to the slurry preparation device (1) for mixing and stirring the dehydrated filter cake and water to form a slurry mixture, and sending the slurry mixture into the slurry preparation device (1).

Images