Device for grading coal gasification fine slag
The coal gasification fine slag is separated and graded by solid-liquid blending, flotation and screening devices, which solves the problem of low separation efficiency, realizes efficient recycling of fine slag and improves economic benefits.
Patent Information
- Application Number
- CN202422558790.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-10-21
AI Technical Summary
The existing technology has low separation efficiency of coal gasification fine slag, especially small-particle ash is easily entrained into the concentrate, affecting the separation effect and product quality. The main treatment methods are stacking and landfilling, which occupies land resources and pollutes the environment.
The solid-liquid blending device is used to proportion and concentrate the coal gasification fine slag suspension, the ash and residual carbon are separated by a flotation device, the foam layer is collected by a foam collection device, and vibration screening is carried out in a screening device to obtain concentrate products of different grades.
The efficient quality classification of coal gasification fine slag is achieved, the sedimentation and filtration steps are saved, the product utilization rate and economic benefits are improved, and the product has a wider range of uses.
Smart Images
Figure CN223393603U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of solid waste treatment, in particular to a device for quality classification of coal gasification fine slag. Background Art
[0002] Coal gasification slag is a solid waste produced during the coal gasification process. my country produces over 80 million tons annually. Currently, coal gasification slag is mainly disposed of by stacking and landfilling. This not only occupies a large amount of land resources but also causes serious pollution to the ecological environment. Coal gasification slag is mainly composed of residual carbon and ash. If these two components can be effectively separated, they will have important environmental and economic value. Flotation is a method for efficiently separating coal gasification slag. However, flotation separation methods have the problem of low efficiency when treating coal gasification slag. In particular, small-particle ash is easily entrained in the concentrate, seriously affecting the separation effect and product quality.
[0003] To this end, we propose a device for classifying and grading coal gasification fine slag. Summary of the Invention
[0004] In view of the above-mentioned deficiencies in the prior art, the utility model provides a device for classifying and grading coal gasification fine slag.
[0005] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the present utility model is:
[0006] A device for classifying and grading coal gasification fine slag, comprising: a solid-liquid blending device, a shell provided with a feed port and a discharge port, the solid-liquid blending device being used to proportion and concentrate the fine slag suspension produced in the coal gasification process section; a flotation device connected to the discharge port of the solid-liquid blending device, the flotation device being used to float the fine slag suspension concentrated by the solid-liquid blending device; a foam collecting device, arranged behind the flotation device, the foam collecting device being used to receive a foam layer after flotation by the flotation device; and a screening device, connected to the discharge end of the foam collecting device, the screening device being used to vibrate, screen and grade the foam layer collected by the foam collecting device.
[0007] By setting up a solid-liquid blending device, the fine slag suspension generated in the coal gasification process section is proportioned and concentrated, and then floated by a flotation device to obtain tailings and a foam layer, and then the foam layer is collected by a foam collection device, and then the foam layer is sent to a screening device for vibration screening to obtain a concentrate. Compared with the prior art in which the fine slag suspension is sedimented and filtered to obtain solid waste coal gasification fine slag, which is generally treated by stacking and landfilling, different carbon-rich products are obtained after treatment by this device, and different carbon-rich products can be used for different purposes, thereby realizing the recycling of coal gasification fine slag, and there is no need to sediment and filter the fine slag suspension before treatment, so the recovered products are more diverse and the product uses are wider.
[0008] It is further defined that the solid-liquid mixing device includes a hollow shell, a mixing rake, a mixing shaft and an overflow hole; the space inside the shell serves as a mixing bin, the mixing shaft is vertically rotatably connected to the shell, and the mixing shaft is located at the center of the shell, the mixing rake is fixed on the circumferential surface of the mixing shaft, the mixing shaft is driven to rotate by a motor, a feed pipe is provided at the feed port, the feed port is opened at the upper side wall of the shell, the shell is cylindrical, and the bottom surface is a downwardly protruding conical surface, the discharge port is opened at the center of the bottom surface of the shell, the discharge port is connected to the discharge pipe, the overflow hole is opened at the upper side wall of the shell, and the overflow hole is connected to the overflow pipe.
[0009] Fine slag suspension is added to the mixing bin through the feed port. The internal batching rake drives the solid particles at the bottom to move under the rotation of the batching shaft to prevent the solid particles from settling at the bottom. Under the action of gravity sedimentation and the batching rake, flotation pulp with a suitable flotation solid-liquid ratio is obtained. The flotation pulp is discharged from the discharge pipe of the discharge port. The obtained water density is lower than that of the flotation pulp and is discharged from the overflow pipe on the top of the mixing bin. The water can also be used for gas washing in the coal gasification process section, which is more conducive to material saving.
[0010] It is further defined that the flotation device includes a flotation tank, a vent pipe, a tailings outlet, a flotation motor, a flotation rotor and a scraper; the end of the discharge pipe is located in the flotation tank, a discharge trough is provided on one side of the flotation tank, the flotation motor is vertically fixed above the flotation tank through a bracket, the flotation rotor is fixedly connected to the output shaft of the flotation motor, the vent pipe is passed through the outside of the flotation rotor and the top is fixed on the bracket, an air intake pipe connected to the air intake device is provided on the circumference of the vent pipe, the tailings outlet is opened at the bottom of the flotation tank, and the scraper is provided above the flotation tank through a rotating shaft, and is used to scrape the foam layer on the surface of the flotation tank out of the discharge trough.
[0011] By discharging the flotation pulp into the flotation tank for flotation, the ash in the flotation pulp is generally hydrophilic, and the residual carbon is hydrophobic. The hydrophobic residual carbon gradually forms bubbles under the action of air and flotation agents and floats to the top to form a bubble layer, while the ash forms a pulp layer at the bottom. The pulp layer is discharged from the tailings outlet at the bottom of the flotation tank. The discharged pulp layer is sedimented and filtered to obtain tailings, thereby realizing the separation and recovery of residual carbon.
[0012] It is further defined that the foam collecting device is disc-shaped and has a downwardly protruding conical surface on the bottom. The foam collecting device is arranged below the discharge slot to access the foam layer. A trumpet-shaped discharge outlet is provided at the center of the bottom surface of the foam collecting device, and the discharge outlet is connected to a discharge pipe. The foam collecting device is connected to the screening device through the discharge pipe. The foam collecting device is arranged to have a simple disc-shaped structure, is arranged below the discharge slot to directly access the bubble layer, and is easy to use.
[0013] It is further defined that the screening device includes a screening body, a screening inlet, a screen box cover, an observation port, a screen and a receiving hopper; the screen box cover is arranged above the screening body to close the screening body, the screen is inclined in the screening body, the screening inlet and the observation port are both arranged on the screen box cover, the screen box cover is also inclined, and the screening inlet is arranged at the highest point of the screen box cover, the receiving hopper matches the screen, is inclined below the screen, and the discharge pipe is connected to the screening inlet; the foam layer is vibrated and screened by the screening body, and the foam that does not pass through the screen is removed The first-level concentrate is marked as primary concentrate, and the one that falls through the screen into the receiving hopper below is marked as secondary concentrate. The foam layer is further screened by a vibration mechanism. The two can be used for different purposes. The first-level concentrate has a large specific surface area, a developed microscopic pore size and a high carbon content, and can be used for the research of carbon materials, such as catalyst carriers, electrode materials and adsorbents. Compared with the first-level concentrate, the second-level concentrate has a smaller specific surface area and a lower carbon content, and can be returned to the furnace for combustion, reducing coal consumption and improving the utilization rate and economic benefits of coal gasification fine slag.
[0014] The beneficial effects of the utility model are as follows: the coal gasification fine slag is classified and graded by the device and method, which saves the sedimentation and filtration operations before treatment, saves steps, and the classification is more refined, thereby improving the utilization rate and economic benefits of the coal gasification fine slag. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 An overall schematic diagram of the device of the utility model;
[0016] Figure 2 Schematic diagram of the internal structure of the solid-liquid proportioning device;
[0017] Figure 3 Schematic diagram of the internal structure of the flotation device;
[0018] Figure 4 Schematic diagram of the internal structure of the foam collection device and the vibration device.
[0019] The symbols of the components are as follows:
[0020] Solid-liquid mixing device 1, shell 11, batching rake 12, batching shaft 13, overflow hole 14, feed port 15, discharge port 16, feed pipe 17, discharge pipe 18, flotation device 2, flotation tank 21, vent pipe 22, air inlet pipe 221, tailings outlet 23, flotation motor 24, flotation rotor 25, scraper 26, foam collecting device 3, discharge port 31, discharge pipe 32, vibration device 4, vibration body 41, screening inlet 42, screen box cover 43, observation port 44, screen 45, receiving hopper 46. DETAILED DESCRIPTION
[0021] The specific implementation methods of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation methods. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.
[0022] Example:
[0023] like Figure 1-Figure 4As shown, a device for classifying and grading fine slag from coal gasification comprises a solid-liquid mixing device 1, a flotation device 2, a foam collecting device 3 and a screening device 4; the solid-liquid mixing device 1 comprises a hollow shell 11, a batching rake 12, a batching shaft 13 and an overflow hole 14; a feed port 15 and a discharge port 16 are provided on the shell 11, and the solid-liquid mixing device 1 is used to carry out batching and concentration on the fine slag suspension produced in the coal gasification process section; the space inside the shell 11 serves as a mixing bin, the batching shaft 13 is vertically rotatably connected to the shell 11, and the batching shaft 13 is located at the center of the shell 11, the batching rake 12 is fixedly arranged on the circumference of the batching shaft 13, and the batching shaft 13 is driven to rotate by a motor, a feed pipe 17 is provided at the feed port 15, and the feed port 15 is opened on the upper part of the side wall of the shell 11, the shell 11 is cylindrical, and the bottom surface is a downwardly convex conical surface, the discharge port 16 is opened at the center of the bottom surface of the shell 11, the discharge port 16 is connected to the discharge pipe 18, the overflow hole 14 is opened on the upper part of the side wall of the shell 11, and the overflow hole 14 is connected to the overflow pipe; the flotation device 2 is used to float the fine slag suspension concentrated by the solid-liquid blending device 1; the flotation device 2 includes a flotation tank 21, a vent pipe 22, a tailings outlet 23, a flotation motor 24, a flotation rotor 25 and a scraper 26; the end of the discharge pipe 18 is located in the flotation tank 21, and a discharge slot is provided on one side of the flotation tank 21. The flotation motor 24 is vertically fixed above the flotation tank 21 through a bracket, and the flotation rotor 25 is fixedly connected to the flotation motor On the output shaft of the machine 24, the vent pipe 22 is passed through the outside of the flotation rotor 25, and the top is fixed on the bracket. An air intake pipe 221 connected to the air intake device is provided on the circumference of the vent pipe 22. The tailings outlet 23 is opened at the bottom of the flotation tank 21. The scraper 26 is provided above the flotation tank 21 through the rotating shaft, and is used to scrape the foam layer on the surface of the flotation tank 21 out of the discharge slot; the foam collecting device 3 is provided behind the flotation device 2, and the foam collecting device 3 is used to receive the foam layer after flotation by the flotation device 2; the foam collecting device 3 is disc-shaped, and the bottom surface is a downwardly convex conical surface. The foam collecting device 3 is provided below the discharge slot to receive the foam layer. The center position of the bottom surface of the foam collecting device 3 is provided with a trumpet-shaped discharge port 31, and the discharge port 31 It is connected to a discharge pipe 32, and the foam collecting device 3 is connected to the screening device 4 through the discharge pipe 32; the screening device 4 is used to vibrate, screen and grade the foam layer collected by the foam collecting device 3; the screening device 4 includes a screening body 41, a screening inlet 42, a screen box cover 43, an observation port 44, a screen 45 and a receiving hopper 46; the screen box cover 43 is provided above the screening body 41 to close the screening body 41, the screen 45 is tilted in the screening body 41, the screening inlet 42 and the observation port 44 are both provided on the screen box cover 43, the screen box cover 43 is also tilted, and the screening inlet 42 is provided at the highest point of the screen box cover 43, the receiving hopper 46 matches the screen 45, is tilted below the screen 45, and the discharge pipe 32 is connected to the screening inlet 42.
[0024] The fine slag suspension produced in the coal gasification process section is proportioned and concentrated by setting a solid-liquid blending device 1, and then floated by a flotation device 2 to obtain tailings and a foam layer, and then the foam layer is collected by a foam collecting device 3, and then the foam layer is sent to a screening device 4 for vibration screening to obtain a concentrate. Compared with the prior art in which the fine slag suspension is sedimented and filtered to obtain solid waste coal gasification fine slag, which is generally treated by stacking and landfilling, different carbon-rich products are obtained after treatment by this device, and different carbon-rich products can be used for different purposes, realizing the recycling of coal gasification fine slag. The fine slag suspension does not need to be settled and filtered before treatment, and the recovered products are more diverse and have wider uses. The fine slag suspension is added to the mixing bin through the feed port 15, and the internal batching rake 12 drives the solid particles at the bottom to move under the rotation of the batching shaft 13, so as to prevent the solid particles from settling at the bottom. Under the action of gravity sedimentation and the batching rake 12, a flotation pulp with a suitable flotation solid-liquid ratio is obtained. The flotation pulp is discharged from the discharge pipe 18 of the discharge port 16. The obtained water density is lower than that of the flotation pulp and is discharged from the overflow pipe at the top of the mixing bin. The water can also be used for coal gasification. The use of air washing in the process section is more conducive to material saving; by discharging the flotation pulp into the flotation tank 21 for flotation, the ash in the flotation pulp is generally hydrophilic, and the residual carbon is hydrophobic. The hydrophobic residual carbon gradually forms bubbles under the action of air and floats to the top to form a bubble layer, while the ash forms a pulp layer at the bottom. The pulp layer is discharged from the tailings outlet 23 at the bottom of the flotation tank 21. The discharged pulp layer is sedimented and filtered to obtain tailings, thereby realizing the separation and recovery of residual carbon; the foam collecting device 3 is set to a simple disc-shaped structure, which is arranged below the discharge slot to directly access the bubble layer and is easy to use; The foam layer is vibrated and screened by the screening body 41. The ore that fails to pass through the screen 45 is marked as primary concentrate, and the ore that passes through the screen 45 and falls into the receiving hopper 46 below is marked as secondary concentrate. The foam layer is further screened by the screening device 4. The two can be used for different purposes. The primary concentrate has a large specific surface area, a developed microscopic pore size and a high carbon content, and can be used for the research of carbon materials, such as catalyst carriers, molecular sieves and adsorbents. Compared with the primary concentrate, the secondary concentrate has a smaller specific surface area and a lower carbon content, and can be returned to the furnace for combustion, thereby reducing coal consumption and improving the utilization rate and economic benefits of coal gasification fine slag.
[0025] It should be noted that the proportions in the drawings are not actual proportions.
Claims
1. A device for classifying coal gasification fine slag, characterized in that: include: A solid-liquid mixing device (1) is provided with a feed port (15) and a discharge port (16) on a shell (11). The solid-liquid mixing device (1) is used to mix and concentrate the fine slag suspension produced in the coal gasification process section to achieve a solid-liquid ratio that meets flotation requirements. A flotation device (2) is connected to the discharge port (16) of the solid-liquid mixing device (1), and the flotation device (2) is used to float the fine slag suspension concentrated by the solid-liquid mixing device (1); A foam collecting device (3) is arranged behind the flotation device (2), and the foam collecting device (3) is used to receive the foam layer after flotation by the flotation device (2); A screening device (4) is connected to the discharge end of the foam collecting device (3), and the screening device (4) is used to screen and grade the foam layer collected by the foam collecting device (3).
2. The device for classifying coal gasification fine slag according to claim 1, characterized in that: The solid-liquid mixing device (1) comprises a hollow shell (11), a batching rake (12), a batching shaft (13) and an overflow hole (14); the space inside the shell (11) serves as a mixing chamber, the batching shaft (13) is vertically rotatably connected to the shell (11), and the batching shaft (13) is located at the center of the shell (11); the batching rake (12) is fixed on the circumference of the batching shaft (13), and the batching shaft (13) is driven by a motor. The housing (11) is rotated dynamically, and a feed pipe (17) is provided at the feed port (15). The feed port (15) is opened at the upper part of the side wall of the housing (11). The housing (11) is cylindrical, and the bottom surface is a downwardly convex conical surface. The discharge port (16) is opened at the center of the bottom surface of the housing (11). The discharge port (16) is connected to the discharge pipe (18). The overflow hole (14) is opened at the upper part of the side wall of the housing (11), and the overflow hole (14) is connected to the overflow pipe.
3. The device for classifying coal gasification fine slag according to claim 2, characterized in that: The flotation device (2) comprises a flotation tank (21), a vent pipe (22), a tailings outlet (23), a flotation motor (24), a flotation rotor (25) and a scraper (26); the end of the discharge pipe (18) is located in the flotation tank (21), a discharge slot is provided on one side of the flotation tank (21), the flotation motor (24) is vertically fixed above the flotation tank (21) through a bracket, and the flotation rotor (25) is fixedly connected to the flotation motor. (24), the vent pipe (22) is passed through the outside of the flotation rotor (25), and the top is fixed on the bracket, an air intake pipe (221) connected to the air intake device is provided on the circumference of the vent pipe (22), the tailings outlet (23) is opened at the bottom of the flotation tank (21), and the scraper (26) is provided above the flotation tank (21) through a rotating shaft and is used to scrape the foam layer on the surface of the flotation tank (21) out of the discharge chute.
4. The device for classifying coal gasification fine slag according to claim 3, characterized in that: The foam collecting device (3) is disc-shaped, and its bottom surface is a downwardly convex conical surface. The foam collecting device (3) is arranged below the discharge slot to receive the foam layer. A trumpet-shaped discharge outlet (31) is provided at the center of the bottom surface of the foam collecting device (3). The discharge outlet (31) is connected to a discharge pipe (32). The foam collecting device (3) is connected to the screening device (4) via the discharge pipe (32).
5. The device for classifying coal gasification fine slag according to claim 4, characterized in that: The screening device (4) comprises a screening body (41), a screening inlet (42), a screen box cover (43), an observation port (44), a screen (45) and a receiving hopper (46); the screen box cover (43) is arranged above the screening body (41) to seal the screening body (41); the screen (45) is arranged obliquely in the screening body (41); the screening inlet (42) and the observation port (44) are both arranged on the screen box cover (43); the screen box cover (43) is also arranged obliquely, and the screening inlet (42) is arranged at the highest point of the screen box cover (43); the receiving hopper (46) matches the screen (45) and is arranged obliquely below the screen (45); and the discharge pipe (32) is connected to the screening inlet (42).