Desulfurization device for high-sulfur coal

Abstract

The invention discloses a desulfurization device for high-sulfur coal in the technical field of coal desulfurization equipment, which comprises a flotation column, an overflow groove, a flotation column base, a desulfurization tank base, a conveying frame, a first guide plate, a second guide plate, a third guide plate and a fourth guide plate, the flotation device comprises a flotation column, a first guide plate, a second guide plate, a desulfurization tank, a U-shaped bracket, a third guide plate, a fixed seat, a first guide plate, a second guide plate, a second guide plate, a desulfurization tank, a U-shaped bracket, a third guide plate, a second guide plate, a second guide plate and a fixed seat, wherein the second guide plate is fixedly arranged on the right side of the flotation column and is positioned under the first guide plate; the fixed seat is fixedly mounted at the top of the side surface of the desulfurization tank, organic sulfur in the coal is firstly taken out by using a flotation method, inorganic sulfur in the coal is removed by using a hydrogen peroxide solution, and sulfide in the high-sulfur coal is removed while the desulfurization cost of the high-sulfur coal is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of coal desulfurization equipment, in particular to a desulfurization device for high-sulfur coal. Background Art

[0002] As one of the world's main energy sources, coal combustion releases sulfur dioxide ( ) is the main source of acid rain and air pollution. Although countries have implemented strict emission standards (such as China's "Emission Standards for Air Pollutants from Coal-fired Power Plants" However, existing desulfurization technologies still face the dual challenges of efficiency and cost, which restricts the progress of clean energy transformation.

[0003] The desulfurization methods currently widely used in industry include: Wet desulfurization (limestone-gypsum method): The desulfurization efficiency is relatively high (90%~95%), but there are the following problems: it is difficult to process high-sulfur coal (sulfur content>3%), and the tail flue gas still contains trace amounts of , the equipment investment is large (accounting for 15%~20% of the total investment of the power plant), the operating energy consumption is high (the power consumption rate of the plant increases by 1%~2%), and the utilization rate of the by-product gypsum is insufficient (about 30% of it is landfilled globally).

[0004] Dry / semi-dry desulfurization (such as spray drying): Suitable for small and medium-sized units, but the desulfurization efficiency is only 60%~80%, and the adsorbent (such as activated carbon) is expensive and difficult to regenerate.

[0005] Biological desulfurization: Environmentally friendly but slow, limiting its industrial application. Existing technologies remove less than 50% of high-sulfur coal and rely on high temperatures, high pressures, or complex catalysts, further increasing costs.

[0006] To this end, we propose a desulfurization device for high-sulfur coal. Summary of the Invention

[0007] The object of the present invention is to provide a desulfurization device for high-sulfur coal to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: a desulfurization device for high-sulfur coal, comprising a flotation column, an overflow tank, a flotation column base, a desulfurization tank base, and a conveying frame; A first guide plate, which is fixedly mounted on the right side of the overflow trough and communicates with the overflow trough; A second guide plate, the second guide plate is fixedly mounted on the right side of the flotation column, and the second guide plate is directly below the first guide plate; Desulfurization tank, the desulfurization tank is fixedly installed on the top of the desulfurization tank; A U-shaped bracket, the U-shaped bracket is fixedly installed on the top of the desulfurization tank; A third guide plate, the third guide plate is fixedly installed on the right side of the desulfurization tank; A fixing seat, the fixing seat is fixedly mounted on the top of the side of the desulfurization tank; A water pump is fixedly mounted on the top of the fixing base; A hydrogen peroxide solution tank is installed at the bottom of the side of the desulfurization tank; A water inlet pipe is installed on the water pump, and the bottom end of the water inlet pipe is deep into the hydrogen peroxide solution tank; A second reduction motor, the second reduction motor is fixedly mounted on the front left end of the conveying frame; Guide rollers, the guide rollers are installed on the conveying frame, and the guide rollers are provided in six groups, and the six groups of guide rollers are evenly installed on the conveying frame; filter cloth, the filter cloth is sleeved on the guide roller; A cleaning mechanism is fixedly mounted on the top of the conveying frame, and two groups of cleaning mechanisms are provided; A mounting plate, the mounting plate is fixedly mounted on the right end of the top of the conveyor frame, and two groups of mounting plates are provided, and a pressure roller is provided between the two groups of mounting plates; The third reduction motor is mounted on the mounting plate.

[0009] Preferably, a first reduction motor is provided at the top of the U-shaped bracket, a transmission shaft is provided at the bottom of the U-shaped bracket, and a stirring blade is provided on the transmission shaft.

[0010] Preferably, the transmission shaft passes through a U-shaped bracket and is connected to the output shaft of the first reduction motor, and the transmission shaft and the U-shaped bracket are movably connected.

[0011] Preferably, the stirring blades are provided in two groups, and both groups of stirring blades are inclined.

[0012] Preferably, a water inlet pipe is provided on the upper portion of the water pump, and the water inlet pipe extends into the desulfurization tank.

[0013] Preferably, the cleaning mechanism includes a water spray pipe, a nozzle is provided at the bottom of the water spray pipe, and a connecting pipe is provided at the top of the water spray pipe.

[0014] Preferably, the nozzles are arranged in four groups, wherein the two groups of nozzles on the left are arranged tilted to the right, and the two groups of nozzles on the right are arranged tilted to the left.

[0015] Preferably, the front and rear ends of the six groups of guide rollers located at both ends of the conveying frame extend outward.

[0016] Preferably, two groups of the pressing rollers and the third reduction motor are provided, and the diameters of the two groups of pressing rollers gradually increase from the middle to both ends.

[0017] Preferably, both ends of the guide roller are connected to the conveying frame via bearings, and both ends of the pressure roller are connected to the mounting plate via bearings.

[0018] Compared with the prior art, the present invention has the following beneficial effects: coal particles are adsorbed on the bubbles generated by the bubble generator and float on the top of the flotation column. The flotation column scraper is started, so that the coal particles adsorbed by the bubbles flow into the overflow trough, and the organic sulfur in the coal is removed. The overflow trough is inclined, and the coal particles flow to the first guide plate and enter the desulfurization tank through the second guide plate. The first reduction motor drives the stirring blade to rotate through the transmission shaft to stir the hydrogen peroxide solution in the desulfurization tank, so that the coal particles are fully in contact with the hydrogen peroxide solution. The organic sulfur and inorganic sulfur in the coal are converted into soluble sulfate or sulfur dioxide through strong oxidizing properties to fully remove the inorganic sulfur contained in the coal. At the same time, the organic sulfur that has not been completely removed by the flotation column is completely removed, thereby completing the rapid and efficient desulfurization of high-sulfur coal. By using the flotation method to first remove the organic sulfur in the coal, and then removing the inorganic sulfur in the coal through the hydrogen peroxide solution, the sulfide in the high-sulfur coal is removed while controlling the desulfurization cost of the high-sulfur coal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 This is a schematic structural diagram of the cleaning mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the pressure roller of the present invention.

[0020] In the figure: 1. Flotation column; 2. Overflow trough; 3. First guide plate; 4. Second guide plate; 5. Flotation column base; 6. Desulfurization tank; 7. Desulfurization tank base; 8. U-shaped bracket; 81. First reduction motor; 9. Drive shaft; 10. Stirring blade; 11. Third guide plate; 12. Fixed seat; 13. Water pump; 14. Water inlet pipe; 15. Hydrogen peroxide solution tank; 16. Conveying rack; 17. Second reduction motor; 18. Guide roller; 19. Filter cloth; 20. Cleaning mechanism; 201. Water spray pipe; 202. Spray head; 203. Connecting pipe; 21. Mounting plate; 22. Pressing roller; 23. Third reduction motor. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4 The present invention provides a technical solution: a desulfurization device for high-sulfur coal, including a flotation column 1, an overflow trough 2, a flotation column base 5, a desulfurization tank base 7, and a conveying frame 16. The first guide plate 3 is fixedly installed on the right side of the overflow trough 2, and the first guide plate 3 is communicated with the overflow trough 2. The second guide plate 4 is fixedly installed on the right side of the flotation column 1, and the second guide plate 4 is directly below the first guide plate 3. The desulfurization tank 6 is fixedly installed on the top of the desulfurization tank 6, the U-shaped bracket 8 is fixedly installed on the top of the desulfurization tank 6, the third guide plate 11 is fixedly installed on the right side of the desulfurization tank 6, the fixing seat 12 is fixedly installed on the top of the side of the desulfurization tank 6, the water pump 13 is fixedly installed on the top of the fixing seat 12, and the hydrogen peroxide solution tank 15 is fixedly installed. Installed at the bottom of the side of the desulfurization tank 6, the water inlet pipe 14 is installed on the water pump 13, the bottom end of the water inlet pipe 14 is deep into the hydrogen peroxide solution tank 15, the second reduction motor 17 is fixedly mounted on the front left end of the conveying frame 16, the guide roller 18 is mounted on the conveying frame 16, and the guide roller 16 is provided with six groups. The six groups of guide rollers 16 are evenly installed on the conveying frame 16. The filter cloth 19 is sleeved on the guide roller 18. The cleaning mechanism 20 is fixedly mounted on the top of the conveying frame 16. The cleaning mechanism 20 is provided with two groups. The mounting plate 21 is fixedly mounted on the right end of the top of the conveying frame 16. The mounting plate 21 is provided with two groups. A pressure roller 22 is provided between the two groups of mounting plates 21. The third reduction motor 23 is mounted on the mounting plate 21; When the device desulfurizes high-sulfur coal, the high-sulfur coal is crushed by a crusher with a crushing diameter of less than 0.5 mm. The crushed coal particles are added to the flotation column 1. The flotation column 1 works. Under the action of the reagent of the slurry in the flotation column 1, the coal particles are adsorbed on the bubbles generated by the bubble generator and float on the top of the flotation column 1. The flotation column scraper is started to make the coal particles adsorbed by the bubbles flow into the overflow trough 2 to remove the organic sulfur in the coal. The overflow trough 2 is set obliquely, and the coal particles flow to the first guide plate 3. The coal enters the desulfurization tank 6 through the second guide plate 4, and the first reduction motor 81 is started. The first reduction motor 81 drives the stirring blade 10 to rotate through the transmission shaft to stir the hydrogen peroxide solution in the desulfurization tank 6, so that the coal particles are fully in contact with the hydrogen peroxide solution. The organic sulfur and inorganic sulfur in the coal are converted into soluble sulfate or sulfur dioxide through strong oxidizing properties to fully remove the inorganic sulfur contained in the coal, and the organic sulfur that has not been completely removed by the flotation column 1 is completely removed. At the same time, the liquid level in the desulfurization tank 6 is higher than the third guide plate. 13. Driven by the hydrogen peroxide solution, the coal particles flow through the third guide plate 11 and onto the filter cloth 19. Simultaneously, the rotation of the stirring blades 10 prevents the coal particles from settling at the bottom of the desulfurization tank 6. The second reduction motor 17 is started. The output end of the second reduction motor 17 passes through one side of the conveyor frame 16 and is connected to the guide roller 18. The second reduction motor 17 drives the guide roller 18 to rotate, which in turn drives the filter cloth 19 to rotate the coal particles. The filter cloth 19 then drives the coal particles through the cleaning mechanism 20. The cleaning mechanism 20 sprays water to clean the coal particles, removing any residual hydrogen peroxide solution from the surface of the particles. When the coal particles move below the pressure roller 22, the pressure roller 22 is positioned above the guide roller 18. The pressure roller 22 and the guide roller 18 cooperate to squeeze the coal particles, removing moisture from the coal particles, completing the rapid and efficient desulfurization of the high-sulfur coal. Organic sulfur is first removed from the coal by flotation, and inorganic sulfur is then removed from the coal by the hydrogen peroxide solution. This reduces the desulfurization cost of the high-sulfur coal while removing sulfides from the high-sulfur coal.

[0023] Reference embodiment: A first reduction motor 81 is provided on the top of the U-shaped bracket 8, a transmission shaft 9 is provided at the bottom of the U-shaped bracket 8, and a stirring blade 10 is provided on the transmission shaft 9. The transmission shaft 9 passes through the U-shaped bracket 8 and is connected to the output shaft of the first reduction motor 81. The transmission shaft 9 and the U-shaped bracket 8 are movably connected. The first reduction motor 81 drives the stirring blade 10 to rotate through the transmission shaft 9 to stir the solution in the desulfurization tank 6. The coal particles are fully in contact with the hydrogen peroxide solution to remove the inorganic sulfur and organic sulfur in the coal. Two groups of stirring blades 10 are provided, and the two groups of stirring blades 10 are both tilted. The stirring blades 10 are tilted to better stir the solution in the desulfurization tank 6 and prevent the coal particles from depositing at the bottom of the desulfurization tank 6.

[0024] Reference embodiment: A water inlet pipe is provided on the upper part of the water pump 13, and the water inlet pipe extends into the desulfurization tank 6. When the water pump 13 is started, the water pump 13 extracts the hydrogen peroxide solution in the hydrogen peroxide solution tank 15 through the water inlet pipe to maintain the concentration of the hydrogen peroxide solution in the desulfurization tank 6.

[0025] Reference embodiment: The cleaning mechanism 20 includes a water spray pipe 201, a nozzle 202 is provided at the bottom of the water spray pipe 201, a connecting pipe 203 is provided at the top of the water spray pipe 201, and four groups of nozzles 202 are provided, of which the two groups of nozzles 202 on the left are tilted to the right, and the two groups of nozzles 202 on the right are tilted to the left. The connecting pipe 203 is connected to a water pump. When the water pump works, water passes through the connecting pipe 203 and the water spray pipe 201, and finally is sprayed out through the nozzle 202 to clean the coal particles. The nozzle is tilted, and the water flows through the nozzle 202 and is sprayed toward the middle position of the filter cloth 19, so that the coal particles move toward the middle of the filter cloth under the action of the water flow sprayed from the nozzle 202, thereby preventing the coal particles from falling off the filter cloth 19.

[0026] Reference embodiment: six groups of guide rollers 18, of which the front and rear ends of the guide rollers 18 at both ends of the conveying frame 16 extend outward to limit the filter cloth 19 to prevent the filter cloth 19 from shifting during rotation. Two groups of pressure rollers 22 and the third reduction motor are provided. The diameters of the two groups of pressure rollers 22 gradually increase from the middle to the two ends. Space is left between the pressure rollers 22 and the filter cloth 19 and the guide rollers 18. When the pressure rollers 22 squeeze the coal particles to remove moisture from the guide rollers 18, the coal particles can pass through, and at the same time, the coal particles are prevented from shifting or detaching from the filter cloth during squeezing.

[0027] Reference embodiment: Both ends of the guide roller 18 are connected to the conveying frame 16 via bearings, and both ends of the pressure roller 22 are connected to the mounting plate 21 via bearings, and the guide roller 18 and the pressure roller 22 rotate via the bearings.

[0028] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A desulfurization device for high-sulfur coal, characterized in that: It includes a flotation column (1), an overflow tank (2), a flotation column base (5), a desulfurization tank base (7), and a conveying frame (16); A first guide plate (3), the first guide plate (3) is fixedly mounted on the right side of the overflow trough (2), and the first guide plate (3) is in communication with the overflow trough (2); A second guide plate (4), the second guide plate (4) is fixedly mounted on the right side of the flotation column (1), and the second guide plate (4) is directly below the first guide plate (3); Desulfurization tank (6), the desulfurization tank (6) is fixedly installed on the top of the desulfurization tank (6); A U-shaped bracket (8), the U-shaped bracket (8) is fixedly mounted on the top of the desulfurization tank (6); A third guide plate (11), the third guide plate (11) is fixedly mounted on the right side of the desulfurization tank (6); A fixing seat (12), the fixing seat (12) is fixedly mounted on the top side of the desulfurization tank (6); A water pump (13), the water pump (13) is fixedly mounted on the top of the fixing seat (12); A hydrogen peroxide solution tank (15), the hydrogen peroxide solution tank (15) is installed at the bottom of the side of the desulfurization tank (6); A water inlet pipe (14), the water inlet pipe (14) is installed on the water pump (13), and the bottom end of the water inlet pipe (14) is deeply inserted into the hydrogen peroxide solution tank (15); A second reduction motor (17), the second reduction motor (17) is fixedly mounted on the front left end of the conveying frame (16); Guide rollers (18), the guide rollers (18) are mounted on the conveying frame (16), and six groups of guide rollers (18) are provided. The six groups of guide rollers (18) are evenly mounted on the conveying frame (16); A filter cloth (19), the filter cloth (19) being sleeved on the guide roller (18); A cleaning mechanism (20), the cleaning mechanism (20) is fixedly mounted on the top of the conveying frame (16), and the cleaning mechanism (20) is provided with two groups; A mounting plate (21), the mounting plate (21) is fixedly mounted on the top right end of the conveying frame (16), two groups of the mounting plates (21) are provided, and a pressure roller (22) is provided between the two groups of mounting plates (21); A third reduction motor (23), the third reduction motor (23) is mounted on the mounting plate (21).

2. A high-sulfur coal desulfurization device according to claim 1, characterized in that: A first reduction motor (81) is provided at the top of the U-shaped bracket (8), a transmission shaft (9) is provided at the bottom of the U-shaped bracket (8), and a stirring blade (10) is provided on the transmission shaft (9).

3. A high-sulfur coal desulfurization device according to claim 2, characterized in that: The transmission shaft (9) passes through the U-shaped bracket (8) and is connected to the output shaft of the first reduction motor (81), and the transmission shaft (9) and the U-shaped bracket (8) are movably connected.

4. The high-sulfur coal desulfurization device according to claim 2, characterized in that: The stirring blades (10) are provided in two groups, and both groups of stirring blades (10) are arranged at an angle.

5. The high-sulfur coal desulfurization device according to claim 1, characterized in that: A water inlet pipe is provided on the upper portion of the water pump (13), and the water inlet pipe extends into the desulfurization tank (6).

6. The high-sulfur coal desulfurization device according to claim 1, characterized in that: The cleaning mechanism (20) comprises a water spray pipe (201), a nozzle (202) is provided at the bottom of the water spray pipe (201), and a connecting pipe (203) is provided at the top of the water spray pipe (201).

7. The high-sulfur coal desulfurization device according to claim 5, characterized in that: The nozzles (202) are provided in four groups, wherein the two groups of nozzles (202) on the left are arranged tilted to the right, and the two groups of nozzles (202) on the right are arranged tilted to the left.

8. The high-sulfur coal desulfurization device according to claim 1, characterized in that: Among the six groups of guide rollers (18), the guide rollers (18) located at both ends of the conveying frame (16) have front and rear ends extending outward.

9. The high-sulfur coal desulfurization device according to claim 1, characterized in that: Two groups of the pressure rollers (22) and the third reduction motor are provided, and the diameters of the two groups of pressure rollers (22) gradually increase from the middle to both ends.

10. The high-sulfur coal desulfurization device according to claim 1, characterized in that: The two ends of the guide roller (18) are connected to the conveying frame (16) via bearings, and the two ends of the pressure roller (22) are connected to the mounting plate (21) via bearings.

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