AU2020102489A4 - Method and device for improving reaction rate of ore pulp desulfurization by using surfactant - Google Patents

Method and device for improving reaction rate of ore pulp desulfurization by using surfactant Download PDF

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AU2020102489A4
AU2020102489A4 AU2020102489A AU2020102489A AU2020102489A4 AU 2020102489 A4 AU2020102489 A4 AU 2020102489A4 AU 2020102489 A AU2020102489 A AU 2020102489A AU 2020102489 A AU2020102489 A AU 2020102489A AU 2020102489 A4 AU2020102489 A4 AU 2020102489A4
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surfactant
ore pulp
shell
fixed disk
reaction
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AU2020102489A
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Xuewei Hu
Jianhong Huang
Yingjie Li
Ping NING
Senlin TIAN
Feng Yin
Qun Zhao
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Kunming University of Science and Technology
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Univ Kunming Science & Technology
Kunming University of Science and Technology
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K23/00—Use of substances as emulsifying, wetting, dispersing, or foam-producing agents
    • C09K23/007—Organic compounds containing halogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80—Semi-solid phase processes, i.e. by using slurries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/61—Phosphates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/12—Methods and means for introducing reactants
    • B01D2259/126—Semi-solid reactants, e.g. slurries

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Treating Waste Gases (AREA)

Abstract

The disclosure relates to a method and device for improving a reaction rate of ore pulp desulfurization by using a surfactant. The method includes the following steps: Si. preparing phosphate ore pulp with a liquid-solid ratio of 30%-50%, and evenly mixing a surfactant in the phosphate ore pulp to obtain absorption slurry; and S2. evenly mixing flue gas to be desulfurized with oxygen, fully mixing the mixed gas with the absorption slurry obtained in step Sl for reaction, and discharging the treated flue gas. The disclosure uses the phosphate ore pulp mixed with the surfactant to perform flue gas desulfurization, so that the turbulent resistance is reduced, the mass transfer resistance of SO 2 absorption is reduced, and the suspension property of the ore pulp is enhanced. This promotes the reaction, and further obviously improves the desulfurization reaction rate and desulfurization efficiency. The treatment device according to the disclosure has the advantage of quick reaction, has an automatic slag discharge function, does not affect flue gas treatment, and is convenient to operate and efficient. 10 DRAWINGS 9 17 r2 6 18 12 FIG. 1 17 16 8 13 4- 1 FIG. 2 11

Description

DRAWINGS
9 17 r2 6 18 12
FIG. 1
17
16 8 13 4- 1
FIG. 2
METHOD AND DEVICE FOR IMPROVING REACTION RATE OF ORE PULP DESULFURIZATION BY USING SURFACTANT TECHNICAL FIELD
The disclosure belongs to the field of flue gas purification, and particularly relates to a method and device for improving a reaction rate of ore pulp desulfurization by using a surfactant.
BACKGROUND
With the rapid development of China's economy, industrialization and urbanization is also accelerating, with increasing energy consumption. Currently, the consumption of primary energy such as coal and oil is dominant, and this situation does not change. Our environment is facing more severe challenges. At present, hazy weather frequently occurs in large areas in China, and the main reason of the hazy weather is SO 2 emission. The emission of SO 2 not only causes haze, but also easily forms acid rain. This causes soil acidification, reduces crop yields and corrodes buildings and cultural relics. Therefore, reducing S02 content in the atmosphere is the key to reducing haze and the harm of acid rain.
At present, flue gas desulfurization technologies at home and abroad mainly include limestone-gypsum wet desulfurization, ammonia process desulfurization, sodium alkali process desulfurization, magnesium process desulfurization, phosphate ore pulp process desulfurization, etc. The phosphate ore pulp process flue gas desulfurization is a novel desulfurization method, which mainly uses phosphate ore pulp as an absorbent and transition metal iron ions in phosphate rocks as a catalyst, and uses oxygen to catalyze and oxidize sulfurous acid in a solution into sulfuric acid. This continuously increases the sulfur capacity of the solution and the ability to absorb SO2 in flue gas. Besides, the generated sulfuric acid is further subjected to chemical reaction with the phosphate rocks to achieve the purpose of desulfurization. At present, the existing phosphate ore pulp process desulfurization method is "a method for preparing a phosphate ore pulp desulfurizer from ammonium fluoride wastewater (CN105536492B)". The method specifically adopts ammonium fluoride wastewater and phosphate rock powder discharged from phosphorus chemical enterprises to prepare a desulfurization absorbent, so as to absorb low-concentration sulfur dioxide in flue gas. The method treats waste with waste, and has the advantages of simple process facilities, simplicity in operation, etc. "A method for phosphate ore pulp process desulfurization of tail gas and coproduction of magnesium ammonium phosphate by a coal-fired circulating fluidized bed boiler (CN108105760A)" further removes magnesium element in the phosphate ore pulp while efficiently using the phosphate ore pulp as a desulfurizer, so as to obtain by-product magnesium ammonium phosphate. In the existing phosphate ore pulp process desulfurization technology, although the methods are different, the essence of desulfurization by ore pulp such as phosphate ore pulp is that sulfur dioxide in flue gas enters the ore pulp through gas-liquid mass transfer and is subjected to catalytic oxidation to generate sulfuric acid, and the sulfuric acid reacts with active components such as calcium phosphate in mineral particles to implement desulfurization. However, the sulfuric acid leaching process is often limited, which hinders the improvement of desulfurization efficiency. In view of the foregoing problems, it is necessary to develop a method and device for improving a reaction rate of ore pulp desulfurization by using a surfactant.
SUMMARY
A first objective of the disclosure is to provide a method for improving a reaction rate of ore pulp desulfurization by using a surfactant.
A second objective of the disclosure is to provide a device for implementing a method for improving a reaction rate of ore pulp desulfurization by using a surfactant.
The first objective of the disclosure is achieved as follows. The method includes the following steps:
SI. preparing phosphate ore pulp with a liquid-solid ratio of 30%-50%, and evenly mixing a surfactant in the phosphate ore pulp to obtain absorption slurry; and
S2. evenly mixing flue gas to be desulfurized with oxygen, fully mixing the mixed gas with the absorption slurry obtained in step Si for reaction, and discharging the treated flue gas.
The second objective of the disclosure is achieved as follows. The device includes a shell, an isolation ring, a sealing pressure ring, an upper fixed disk, a lower fixed disk, a driving cylinder, a discharge valve, a turntable, a turntable driving motor, a smoke inlet tube, lower slurry inlet tubes and upper slurry inlet tubes, where the shell has a disc-shaped structure internally having a cavity, the center of the top of the shell has an outward convex structure, and the isolation ring has a structure with a small top and a large bottom; the isolation ring is fixedly disposed in the shell; the isolation ring sequentially divides the shell into a reaction chamber and a discharge chamber from the center to the edge, an annular discharge port is arranged along an outer side of the isolation ring, the sealing pressure ring covers the annular discharge port, the driving cylinder is vertically disposed on the shell, a piston rod of the driving cylinder passes through the shell, extends into the discharge chamber and is fixedly connected to the top of the sealing pressure ring, the discharge valve is disposed at the bottom of the discharge chamber, the lower fixed disk is fixedly disposed at the bottom inside the reaction chamber, the upper fixed disk is fixedly disposed at the top inside the reaction chamber, the turntable driving motor is disposed at the center of the top of the shell, and a power output end of the turntable driving motor is connected to the center of the turntable in the reaction chamber through a rotating shaft; a bottom surface of the upper fixed disk, an upper surface of the lower fixed disk and both surfaces of the turntable are provided with a plurality of grooves, the smoke inlet tube is disposed at the center of the bottom of the reaction chamber, an upper end of the smoke inlet tube passes out of the lower fixed disk, the lower slurry inlet tubes are disposed around the smoke inlet tube, upper ends of the lower slurry inlet tubes pass out of the lower fixed disk, the upper slurry inlet tubes are disposed around the turntable driving motor, lower ends of the upper slurry inlet tubes pass through the outward convex structure at the top of the shell, and the outward convex structure at the top of the shell is provided with a smoke outlet.
The disclosure has the following beneficial effects:
1. The disclosure uses the phosphate ore pulp mixed with a certain amount of surfactant to perform flue gas desulfurization. Specifically, sulfur dioxide in flue gas enters ore pulp through gas-liquid mass transfer and is subjected to catalytic oxidation into sulfuric acid, and the sulfuric acid reacts with mineral particles in the ore pulp, especially active components such as calcium phosphate, to generate calcium sulfate precipitate and phosphoric acid. This promotes the positive reaction of generating sulfuric acid and implements desulfurization. The surfactant in the disclosure causes the turbulent resistance reduction effect and reduces the mass transfer resistance. This promotes the S02 gas-liquid mass transfer reaction rate, makes the S02 gas quickly enter the ore pulp, and enhances the suspension property of the ore pulp. Besides, the cationic fluorocarbon surfactant can reduce the surface tension of minerals and promote the penetration of the catalyzed and oxidized sulfuric acid into micropores of mineral particles, thus promoting the reaction, and further improving the desulfurization reaction rate and desulfurization efficiency. Compared with the conventional ore pulp desulfurization technology, the disclosure has stable desulfurization efficiency and a fast reaction speed, and can reduce the use of ore pulp.
2. The device according to the disclosure continuously introduces mixed flue gas obtained by mixing the dedusted flue gas and oxygen into a reaction chamber through a smoke inlet tube, and the mixed flue gas and the absorption slurry are matched with grooves of the disk surface under the rotating action of a turntable, so that the liquid flow is continuously cut by the grooves. Besides, a swirling flow occurs in the grooves, which leads to rapid reaction in a very short time and has the advantage of high reaction rate. In the reaction process, the device according to the disclosure can automatically discharge slag without affecting the flue gas treatment, and has the advantages of being convenient to operate and having high efficiency.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic structural diagram of a device according to the disclosure;
FIG. 2 is a schematic view of an internal structure of FIG. 1;
FIG. 3 is a schematic top view of an internal structure of a device according to the disclosure;
FIG. 4 is a schematic structural top view of an isolation ring;
FIG. 5 is a schematic structural diagram of an upper fixed disk; and
FIG. 6 is a schematic structural diagram of a lower fixed disk.
In the figure: 1. shell, 2. isolation ring, 3. sealing pressure ring, 4. upper fixed disk, 5. lower fixed disk, 6. driving cylinder, 7. discharge valve, 8. turntable, 9. turntable driving motor, 10. smoke inlet tube, 11. lower slurry inlet tube, 12. upper slurry inlet tube, 13. reaction chamber, 14. discharge chamber, 15. annular discharge port, 16. groove, 17. smoke guide plate, 18. demister.
DETAILED DESCRIPTION
The disclosure is further described below by combining examples and is not limited in any way. Any transformation or replacement based on the teachings of the disclosure falls within the protection scope of the disclosure.
A method according to the disclosure includes the following steps.
SI. Prepare phosphate ore pulp with a liquid-solid ratio of 30%-50%, and evenly mix a surfactant in the phosphate ore pulp to obtain absorption slurry.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Si for reaction, and discharge the treated flue gas.
Preferably, the surfactant in step SI is one or more of a-alkenyl sulfonate surfactant, N-[3 polyether-3-(dimethylamino)-propyl]perfluorooctane sulfonamide surfactant, fluoro-2 hydroxyundecyl diethoxy-ammonium chloride surfactant and octadecyl trimethyl ammonium chloride surfactant.
Preferably, a dosage of the surfactant in step Si is 80-120 ppm.
Preferably, a volume fraction of 02 in the mixed gas in step S2 is 10%-20%.
Preferably, the reaction in step S2 is kept at a constant temperature of 25±5°C for 120 min.
As shown in FIGs. 1-6, a device for implementing the method for improving a reaction rate of ore pulp desulfurization by using a surfactant, including a shell 1, an isolation ring 2, a sealing pressure ring 3, an upper fixed disk 4, a lower fixed disk 5, a driving cylinder 6, a discharge valve 7, a turntable 8, a turntable driving motor 9, a smoke inlet tube 10, lower slurry inlet tubes 11 and upper slurry inlet tubes 12, where the shell 1 has a disc-shaped structure internally having a cavity, the center of the top of the shell 1 has an outward convex structure, and the isolation ring 2 has a structure with a small top and a large bottom; the isolation ring 2 is fixedly disposed in the shell 1; the isolation ring 2 sequentially divides the shell 1 into a reaction chamber 13 and a discharge chamber 14 from the center to the edge, an annular discharge port 15 is arranged along an outer side of the isolation ring 2, the sealing pressure ring 3 covers the annular discharge port , the driving cylinder 6 is vertically disposed on the shell 1, a piston rod of the driving cylinder 6 passes through the shell 1, extends into the discharge chamber 14 and is fixedly connected to the top of the sealing pressure ring 3, the discharge valve 7 is disposed at the bottom of the discharge chamber 14, the lower fixed disk 5 is fixedly disposed at the bottom inside the reaction chamber 13, the upper fixed disk 4 is fixedly disposed at the top inside the reaction chamber 13, the turntable driving motor 9 is disposed at the center of the top of the shell 1, and a power output end of the turntable driving motor 9 is connected to the center of the turntable 8 in the reaction chamber 13 through a rotating shaft; a bottom surface of the upper fixed disk 4, an upper surface of the lower fixed disk 5 and both surfaces of the turntable 8 are provided with a plurality of grooves 16, the smoke inlet tube 10 is disposed at the center of the bottom of the reaction chamber 13, an upper end of the smoke inlet tube 10 passes out of the lower fixed disk 5, the lower slurry inlet tubes 11 are disposed around the smoke inlet tube 10, upper ends of the lower slurry inlet tubes 11 pass out of the lower fixed disk 5, the upper slurry inlet tubes 12 are disposed around the turntable driving motor 9, lower ends of the upper slurry inlet tubes 12 pass through the outward convex structure at the top of the shell 1, and the outward convex structure at the top of the shell 1 is provided with a smoke outlet.
Preferably, the bottom surface of the upper fixed disk 4, the upper surface of the lower fixed disk 5 and both surfaces of the turntable 8 are provided with a plurality of radially arranged grooves 16 from the center of the disk surface to the edge of the disk surface.
Preferably, a smoke guide plate 17 is disposed between the smoke outlet and the turntable driving motor 9.
Preferably, the smoke outlet is provided with a demister 18.
Preferably, a liquid level sensor is disposed on an inner side of the outward convex structure at the top of the shell 1.
Preferably, the smoke inlet tube 10, the lower slurry inlet tubes 11 and the upper slurry inlet tubes 12 are provided with check valves.
The working principle and working process of the device according to the disclosure are as follows: first absorption slurry obtained by evenly mixing phosphate ore slurry and a surfactant simultaneously enters the reaction chamber 13 through the lower slurry inlet tubes 11 and the upper slurry inlet tubes 12 , and the absorption slurry is continuously poured into the reaction chamber 13. Then the turntable driving motor 9 is started to drive the turntable 8 to rotate. Besides, mixed flue gas obtained by mixing dedusted flue gas and oxygen is continuously introduced into the reaction chamber 13 through the smoke inlet tube 10. The mixed flue gas and the absorption slurry are matched with grooves of the disk surface under the rotating action of the turntable 8, so that the liquid flow is continuously cut by the grooves. Besides, a swirling flow occurs in the grooves, which leads to rapid reaction in a very short time. The flue gas flows towards the edge of the turntable 8 from below the turntable 8 and passes across the edge of the turntable 8. When passing over the turntable 8, the flue gas reacts again with the absorption slurry above the turntable 8 and the absorption slurry introduced continuously through the upper slurry inlet tubes 12, so that the treated flue gas meets the flue gas emission standard, and the flue gas is discharged from the smoke outlet. In the reaction process, generated solids and solids in the absorption ore pulp move towards the edge of the reaction chamber 13 under the action of centrifugal force generated by the rotation of the turntable 8. Every time the reaction is performed for a period of time, the driving cylinder 6 is started to lift the sealing pressure ring 3, so that the annular discharge port 15 is opened, and the solids are discharged with some liquid from the discharge valve 7 through the discharge chamber 14 via the annular discharge port 15. Then the driving cylinder 6 is started, and the sealing pressure ring 3 descends to press and seal the annular discharge port 15. In this case, the lower slurry inlet tubes 11 and the upper slurry inlet tubes 12 simultaneously increase the liquid inlet flow rate of the absorption slurry, so that the liquid in the reaction chamber 13 quickly reaches the set liquid level. Then the liquid inlet flow rate returns to the initial flow rate, and increases after the next discharge. The foregoing process is repeated continuously, and the flue gas is continuously desulfurized by absorption slurry.
The disclosure is further described below with reference to Examples 1-7.
Example 1
Si. Prepare phosphate ore pulp with a liquid-solid ratio of 30%, and evenly mix a-alkenyl sulfonate surfactant in the phosphate ore pulp to obtain absorption slurry.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Si for reaction, and discharge the treated flue gas.
Example 2
Si. Prepare phosphate ore pulp with a liquid-solid ratio of 50%, and evenly mix N-[3 polyether-3-(dimethylamino)-propyl]perfluorooctane sulfonamide surfactant in the phosphate ore pulp to obtain absorption slurry.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Si for reaction, and discharge the treated flue gas.
Example 3
Si. Prepare phosphate ore pulp with a liquid-solid ratio of 40%, and evenly mix fluoro-2 hydroxyundecyl diethoxy-ammonium chloride surfactant in the phosphate ore pulp to obtain absorption slurry.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Si for reaction, and discharge the treated flue gas.
Example 4
Si. Prepare phosphate ore pulp with a liquid-solid ratio of 30%, and evenly mix octadecyl trimethyl ammonium chloride surfactant in the phosphate ore pulp to obtain absorption slurry, where a dosage of the surfactant is 80 ppm.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Sl for reaction, and discharge the treated flue gas, where a volume fraction of 02 in the mixed gas is 10%.
Example 5
Si. Prepare phosphate ore pulp with a liquid-solid ratio of 50%, and evenly mix a-alkenyl sulfonate surfactant and N-[3-polyether-3-(dimethylamino)-propyl]perfluorooctane sulfonamide surfactant with a weight ratio of 1:1 in the phosphate ore pulp to obtain absorption slurry, where a dosage of the surfactants is 120 ppm.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Si for reaction, and discharge the treated flue gas, where a volume fraction of 02 in the mixed gas is 20%.
Example 6
SI. Prepare phosphate ore pulp with a liquid-solid ratio of 40%, and evenly mix a-alkenyl sulfonate surfactant, N-[3-polyether-3-(dimethylamino)-propyl]perfluorooctane sulfonamide surfactant and fluoro-2-hydroxyundecyl diethoxy-ammonium chloride surfactant with a weight ratio of 1:1:1 in the phosphate ore pulp to obtain absorption slurry, where a dosage of the cationic fluorocarbon surfactants is 100 ppm.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Si for reaction, and discharge the treated flue gas, where a volume fraction of 02 in the mixed gas is 15%.
Example 7
Si. Prepare phosphate ore pulp with a liquid-solid ratio of 40%, and evenly mix a-alkenyl sulfonate surfactant, N-[3-polyether-3-(dimethylamino)-propyl]perfluorooctane sulfonamide surfactant, fluoro-2-hydroxyundecyl diethoxy-ammonium chloride surfactant and octadecyl trimethyl ammonium chloride surfactant with a weight ratio of 1:1:1:1 in the phosphate ore pulp to obtain absorption slurry, where a dosage of the cationic fluorocarbon surfactants is 110 ppm.
S2. Evenly mix flue gas to be desulfurized with oxygen, fully mix the mixed gas with the absorption slurry obtained in step Sl for reaction, and discharge the treated flue gas, where a volume fraction of 02 in the mixed gas is 15%.

Claims (5)

What is claimed is:
1. A method for improving a reaction rate of ore pulp desulfurization by using a surfactant, comprising the following steps:
S1. preparing phosphate ore pulp with a liquid-solid ratio of 30%-50%, and evenly mixing a surfactant in the phosphate ore pulp to obtain absorption slurry; and
S2. evenly mixing flue gas to be desulfurized with oxygen, fully mixing the mixed gas with the absorption slurry obtained in step Si for reaction, and discharging the treated flue gas.
2. The method for improving a reaction rate of ore pulp desulfurization by using a surfactant according to claim 1, wherein the surfactant in step Sl is one or more of a-alkenyl sulfonate surfactant, N-[3-polyether-3-(dimethylamino)-propyl]perfluorooctane sulfonamide surfactant, fluoro-2-hydroxyundecyl diethoxy-ammonium chloride surfactant and octadecyl trimethyl ammonium chloride surfactant;
wherein a dosage of the surfactant in step Si is 80-120 ppm.
3. The method for improving a reaction rate of ore pulp desulfurization by using a surfactant according to claim 1, wherein a volume fraction of 02 in the mixed gas in step S2 is 10%-20%.
4. A device for implementing the method for improving a reaction rate of ore pulp desulfurization by using a surfactant according to any one of claims 1 to 3, comprising a shell (1), an isolation ring (2), a sealing pressure ring (3), an upper fixed disk (4), a lower fixed disk (5), a driving cylinder (6), a discharge valve (7), a turntable (8), a turntable driving motor (9), a smoke inlet tube (10), lower slurry inlet tubes (11) and upper slurry inlet tubes (12), wherein the shell (1) has a disc-shaped structure internally having a cavity, the center of the top of the shell (1) has an outward convex structure, and the isolation ring (2) has a structure with a small top and a large
bottom; the isolation ring (2) is fixedly disposed in the shell (1); the isolation ring (2) sequentially divides the shell (1) into a reaction chamber (13) and a discharge chamber (14) from the center to the edge, an annular discharge port (15) is arranged along an outer side of the isolation ring (2), the sealing pressure ring (3) covers the annular discharge port (15), the driving cylinder (6) is vertically disposed on the shell (1), a piston rod of the driving cylinder (6) passes through the shell (1), extends into the discharge chamber (14) and is fixedly connected to the top of the sealing pressure ring (3), the discharge valve (7) is disposed at the bottom of the discharge chamber (14), the lower fixed disk (5) is fixedly disposed at the bottom inside the reaction chamber (13), the upper fixed disk (4) is fixedly disposed at the top inside the reaction chamber
(13), the turntable driving motor (9) is disposed at the center of the top of the shell (1), and a power output end of the turntable driving motor (9) is connected to the center of the turntable (8) in the reaction chamber (13) through a rotating shaft; a bottom surface of the upper fixed disk (4), an upper surface of the lower fixed disk (5) and both surfaces of the turntable (8) are provided with a plurality of grooves (16), the smoke inlet tube (10) is disposed at the center of the bottom of the reaction chamber (13), an upper end of the smoke inlet tube (10) passes out of the lower fixed disk (5), the lower slurry inlet tubes (11) are disposed around the smoke inlet tube (10), upper ends of the lower slurry inlet tubes (11) pass out of the lower fixed disk (5), the upper slurry inlet tubes (12) are disposed around the turntable driving motor (9), lower ends of the upper slurry inlet tubes (12) pass through the outward convex structure at the top of the shell (1), and the outward convex structure at the top of the shell (1) is provided with a smoke outlet.
5. The device according to claim 4, wherein the bottom surface of the upper fixed disk (4), the upper surface of the lower fixed disk (5) and both surfaces of the turntable (8) are provided with a plurality of radially arranged grooves (16) from the center of the disk surface to the edge of the disk surface;
wherein a smoke guide plate (17) is disposed between the smoke outlet and the turntable driving motor (9);
wherein the smoke outlet is provided with a demister (18);
wherein a liquid level sensor is disposed on an inner side of the outward convex structure at the top of the shell (1);
wherein the smoke inlet tube (10), the lower slurry inlet tubes (11) and the upper slurry inlet tubes (12) are provided with check valves.
AU2020102489A 2020-09-29 2020-09-29 Method and device for improving reaction rate of ore pulp desulfurization by using surfactant Ceased AU2020102489A4 (en)

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