CN110252117B - Industrial flue gas desulfurization and purification system and desulfurization and purification method thereof - Google Patents
Industrial flue gas desulfurization and purification system and desulfurization and purification method thereof Download PDFInfo
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- CN110252117B CN110252117B CN201910552272.5A CN201910552272A CN110252117B CN 110252117 B CN110252117 B CN 110252117B CN 201910552272 A CN201910552272 A CN 201910552272A CN 110252117 B CN110252117 B CN 110252117B
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- 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
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- 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
- B01D53/504—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 device
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- 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
- B01D53/73—After-treatment of removed components
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- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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Abstract
The invention discloses an industrial flue gas desulfurization purification system which comprises a desulfurization box body arranged obliquely, wherein two ends of the desulfurization box body are respectively supported by a first supporting piece and a second supporting piece; the desulfurization box body is of a long cylindrical structure; a hollow desulfurization channel is coaxially arranged in the cylinder of the desulfurization box body; finally, the flue gas led out from the flue gas leading-out pipe is desulfurized flue gas; the invention has simple structure, realizes the leaching and desulfurizing process of the flue gas by adopting a non-tower structure of non-nozzle spraying, and avoids the situation that the nozzle needs to be repeatedly replaced.
Description
Technical Field
The invention belongs to the field of flue gas desulfurization.
Background
The existing flue gas desulfurization equipment often adopts a leaching tower structure, a leaching spray head of the leaching tower needs to continuously spray leaching liquid in the leaching tower, the contact area between the flue gas and the leaching liquid is increased, and the flowing flue gas is leached; the principle is mainly SO2+ H2O → H2SO 3; CaCO3+ H2SO3 → CaSO3+ CO2+ H2O; because the leacheate contains insoluble CaCO3 turbid liquid, the leaching spray head is easy to block along with the accumulation of time, and the like, and the leaching tower structure needs to continuously lift the leacheate by a certain height through a pump, thereby causing the defect of increased load of the pump; the scheme does not adopt a spraying mode, and the effect of leaching the flue gas can be realized.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a non-spraying type industrial flue gas desulfurization and purification system and a method thereof.
The technical scheme is as follows: in order to achieve the purpose, the industrial flue gas desulfurization and purification system comprises a desulfurization box body which is obliquely arranged, wherein two ends of the desulfurization box body are respectively supported by a first supporting piece and a second supporting piece; the desulfurization box body is of a long cylindrical structure; a hollow desulfurization channel is coaxially arranged in the cylinder of the desulfurization box body; the flue gas inlet pipe is communicated with the upper side of the inclined high end of the hollow desulfurization channel, and the inlet of the flue gas outlet pipe is communicated with the upper side of the inclined low end of the hollow desulfurization channel; the desulfurizer circulating pipe is provided with a circulating pump, and the inlet end of the desulfurizer circulating pipe is communicated with the lower side of the inclined short end of the hollow desulfurization channel; the outlet end of the desulfurizer circulating pipe is communicated with the lower side of the inclined high end of the hollow desulfurization channel; also comprises a desulfurizer supply pipe and a desulfurizer eduction pipe; the outlet bypass of the desulfurizer supply pipe is connected with the desulfurizer circulating pipe, and the inlet bypass of the desulfurizer discharge pipe is connected with the desulfurizer circulating pipe; and a first valve and a second valve are respectively arranged at the outlet of the desulfurizer supply pipe and the inlet of the desulfurizer discharge pipe.
Further, a first convex ring wall, a second convex ring wall and a third convex ring wall are integrally arranged on the inner wall of the hollow desulfurization channel from left to right in sequence; a feeding column cavity is formed in the left side of a first convex ring wall in the hollow desulfurization channel, a first desulfurization column cavity is formed between the first convex ring wall and a second convex ring wall in the hollow desulfurization channel, a second desulfurization column cavity is formed between the second convex ring wall and a third convex ring wall in the hollow desulfurization channel, and a third desulfurization column cavity is formed in the right side of the third convex ring wall in the hollow desulfurization channel; the upper end and the lower end of the feeding column cavity are respectively communicated with the outlet of the flue gas inlet pipe and the outlet of the desulfurizer circulating pipe; the upper end and the lower end of the third desulfurization column cavity are respectively communicated with the inlet of the flue gas outlet pipe and the inlet of the desulfurizer circulating pipe; a desulfurization rotor is also arranged in the desulfurization hollow channel in a coaxial rotating manner; the motor is in driving connection with the desulfurization rotor through a motor output shaft, and the motor drives the desulfurization rotor to rotate through the motor output shaft.
Further, the desulfurization rotor sequentially comprises a first cylinder, a first desulfurization wheel, a first stirring wheel, a second cylinder, a second desulfurization wheel, a second stirring wheel, a third cylinder and a third desulfurization wheel from left to right; the outer wall of the first cylinder body is coaxially and slidably matched with the inner wall of the first convex ring wall; the outer wall of the second cylinder body is coaxially and slidably matched with the inner wall of the second convex ring wall; the outer wall of the third cylinder is coaxially and slidably matched with the inner wall of the third convex ring wall; the first desulfurization wheel and the first stirring wheel are coaxially suspended in the first desulfurization column cavity; the second desulfurization wheel and the second stirring wheel are coaxially suspended in the second desulfurization column cavity; the third desulfurization wheel is coaxially suspended in the third desulfurization column cavity.
Further, the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel respectively comprise rollers, a cylindrical barrel cavity is formed inside each roller, and a partition plate is arranged at the right end of each cylindrical barrel cavity;
the interiors of the first cylinder, the second cylinder and the third cylinder are respectively provided with a first channel, a second channel and a third channel; the left ends of the cylinder cavities in the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel are respectively communicated with the right ends of the first channel, the second channel and the third channel; the left ends of the first channel, the second channel and the third channel are respectively communicated with the right ends of the feeding column cavity, the first desulfurization column cavity and the second desulfurization column cavity; a plurality of desulfurization holes are uniformly distributed on the roller in a circumferential array, and a left annular plate and a right annular plate are integrally arranged at the left end and the right end of the roller along the outline respectively; a plurality of outer water scooping blades are distributed on the outer wall of the roller in a circumferential array manner, the length direction of each outer water scooping blade is parallel to the axis of the roller, two ends of each outer water scooping blade extend to the left annular plate and the right annular plate which are integrally connected, and each outer water scooping blade deflects 50 degrees to 70 degrees anticlockwise relative to the radial direction of the roller, so that a water scooping groove is formed between each outer water scooping blade and the outer wall of the roller; a plurality of inner water scooping blades are distributed on the inner wall of the roller in a circumferential array manner, the length direction of each inner water scooping blade is parallel to the axis of the roller, two ends of each inner water scooping blade extend to the left annular plate and the right annular plate which are integrally connected, and the inner water scooping blades are parallel to the radial direction of the roller;
the first stirring wheel and the second stirring wheel are respectively provided with a plurality of U-shaped stirring rods protruding outwards, and the U-shaped stirring rods are distributed along the axis of the desulfurization rotor in a circumferential array manner; the left ends of the U-shaped stirring rods on the first stirring wheel are respectively and fixedly connected with a right annular plate at the right end of the first desulfurization wheel, and the right ends of the U-shaped stirring rods on the first stirring wheel are respectively and fixedly connected with the left end of the second cylinder; the left ends of the U-shaped stirring rods on the second stirring wheel are respectively and fixedly connected with the right annular plate at the right end of the second desulfurization wheel, and the right ends of the U-shaped stirring rods on the second stirring wheel are respectively and fixedly connected with the left end of the third barrel.
Further, a desulfurization and purification method of an industrial flue gas desulfurization and purification system comprises the following steps:
closing the second valve, opening the first valve, and continuously supplying a desulfurizer liquid to the desulfurizer circulating pipe by the desulfurizer supply pipe, wherein the desulfurizer liquid is lime slurry; continuously starting the circulating pump, guiding the desulfurizer liquid in the desulfurizer circulating pipe into the feeding column cavity under the action of the circulating pump, accumulating the desulfurizer liquid in the feeding column cavity, overflowing the accumulated desulfurizer liquid into the cylinder cavity in the first desulfurization wheel through the first channel, and overflowing the desulfurizer liquid in the cylinder cavity of the first desulfurization wheel into the first desulfurization column cavity through the plurality of desulfurization holes; then, the desulfurizer liquid in the first desulfurization column cavity overflows into a cylinder cavity in the second desulfurization wheel through a second channel, and then the desulfurizer liquid in the cylinder cavity of the second desulfurization wheel overflows into the second desulfurization column cavity through a plurality of desulfurization holes; then, the desulfurizer liquid in the second desulfurization column cavity overflows into a cylinder cavity in a third desulfurization wheel through a third channel, and then the desulfurizer liquid in the cylinder cavity of the third desulfurization wheel overflows into a third desulfurization column cavity through a plurality of desulfurization holes; finally, the desulfurizer liquid in the third desulfurization column cavity returns to the desulfurizer circulating pipe again, the supply of the desulfurizer liquid is cut off after the desulfurizer liquid is supplied to a preset amount by the desulfurizer supply pipe, the first valve is closed, the running state of the circulating pump is continuously maintained, and then the circulating pump enables the desulfurizer liquid in the desulfurization box body to form a circulating flowing desulfurizer flowing internal circulation in the above mode; the liquid level of the desulfurizer liquid at any position in the desulfurization box body is not higher than the axial height of the desulfurization box body by limiting the supply quantity of the desulfurizer supply pipe, so that the flue gas in the hollow desulfurization channel can be ensured to be smooth and unimpeded;
meanwhile, the pressurized sulfur-containing flue gas is pressed into the upper part in the cavity of the feeding column by the industrial flue gas discharge equipment through the flue gas inlet pipe; then, the pressure-accumulating flue gas in the feeding column cavity overflows into the cylinder cavity in the first desulfurization wheel through the first channel, and then the pressure-accumulating flue gas in the cylinder cavity of the first desulfurization wheel overflows into the first desulfurization column cavity through a plurality of desulfurization holes which are not immersed by liquid; then, the pressure-accumulating flue gas in the first desulfurization column cavity overflows into a cylinder cavity in the second desulfurization wheel through a second channel, and then the pressure-accumulating flue gas in the cylinder cavity of the second desulfurization wheel overflows into the second desulfurization column cavity through a plurality of desulfurization holes which are not immersed by liquid; then, the pressure-accumulating flue gas in the second desulfurization column cavity overflows into a barrel cavity in a third desulfurization wheel through a third channel, and then the pressure-accumulating flue gas in the barrel cavity of the third desulfurization wheel overflows into a third desulfurization column cavity through a plurality of desulfurization holes which are not immersed by liquid; finally, the flue gas in the third desulfurization column cavity is led out through a flue gas outlet pipe;
meanwhile, the motor is started, and then the motor drives the desulfurization rotor to rotate continuously and anticlockwise through the motor output shaft, so that the first cylinder, the first desulfurization wheel, the first stirring wheel, the second cylinder, the second desulfurization wheel, the second stirring wheel, the third cylinder and the third desulfurization wheel synchronously rotate anticlockwise; u-shaped stirring rods on the first stirring wheel and the second stirring wheel effectively prevent the bottom of the right ends of the first desulfurization column cavity and the second desulfurization column cavity from generating precipitation retention; the U-shaped stirring rods on the first stirring wheel and the second stirring wheel also play a role of a linkage structure;
in the process, the lower parts of the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel are soaked in the desulfurizer liquid, and the liquid level of the desulfurizer liquid at the positions of the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel is not higher than the height of the axis; therefore, the desulfurization holes on the upper parts of the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel are not submerged by liquid, and are smooth;
on the basis of the above states, the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel continuously rotate anticlockwise, so that the scooping grooves on the roller lift the scooped desulfurizer liquid upwards along the anticlockwise direction, the rotation of the roller enables the desulfurizer liquid in each scooping groove to be subjected to centrifugal force, and then part of the desulfurizer liquid in each scooping groove can be radially thrown out outwards in a centrifugal mode, so that continuous desulfurizer centrifugal splashing liquid is generated in the first desulfurization column cavity, the second desulfurization column cavity and the third desulfurization column cavity, and then the flue gas flowing through the first desulfurization column cavity, the second desulfurization column cavity and the third desulfurization column cavity is fully contacted with the desulfurizer liquid; each outer water scooping blade deflects 50 degrees to 70 degrees anticlockwise relative to the radial direction of the roller, the deflection angle enables water in the water scooping tank to be restrained by the outer water scooping blades while being subjected to centrifugal force, liquid in the water scooping tank is prevented from being thrown out by all centrifugal force immediately after being separated from the liquid level, and the phenomenon of uneven liquid throwing is avoided;
meanwhile, after the desulfurizer liquid is scooped up by the plurality of inner water scooping blades on the roller anticlockwise, because the inner water scooping blades are parallel to the radial direction of the roller, the position of the inner water scooping blades at the height of the axis of the roller becomes a horizontal posture, the liquid scooped up by the inner water scooping blades is lifted to the position of the axis of the roller and then quickly overflows inwards, and after the liquid overflows, the liquid is splashed upwards for a certain distance by inertia, so that the desulfurizer liquid continuously splashed by inertia can be generated in the cylinder cavity in each roller, and further, the flue gas flowing through the cylinder cavity of each roller is fully contacted with the desulfurizer liquid;
the flue gas flowing through the first desulfurization column cavity, the second desulfurization column cavity and the third desulfurization column cavity is fully contacted with the centrifugally dispersed desulfurizer liquid in the process; the flue gas flowing through the cylinder cavities in the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel is fully contacted with the desulfurizer liquid continuously splashed by inertia; the reaction occurs in the above process, SO2+ H2O → H2SO 3; CaCO3+ H2SO3 → CaSO3+ CO2+ H2O; so that the flue gas finally guided out from the flue gas guide-out pipe is the flue gas after desulfurization.
Has the advantages that: the flue gas flowing through the first desulfurization column cavity, the second desulfurization column cavity and the third desulfurization column cavity is fully contacted with the centrifugally dispersed desulfurizer liquid; the flue gas flowing through the cylinder cavities in the first desulfurization wheel, the second desulfurization wheel and the third desulfurization wheel is fully contacted with the desulfurizer liquid continuously splashed by inertia; the reaction occurs in the above process, SO2+ H2O → H2SO 3; CaCO3+ H2SO3 → CaSO3+ CO2+ H2O; so that the flue gas finally guided out from the flue gas guide-out pipe is the flue gas after desulfurization. The invention has simple structure, realizes the leaching and desulfurizing process of the flue gas by adopting a non-tower structure of non-nozzle spraying, and avoids the situation that the nozzle needs to be repeatedly replaced.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus;
FIG. 2 is a schematic front cross-sectional view of the apparatus;
FIG. 3 is a perspective cross-sectional view of the apparatus;
FIG. 4 is a schematic view of a desulfurization rotor;
FIG. 5 is a schematic cut-away perspective view of the first desulfurization wheel, the second desulfurization wheel, or the third desulfurization wheel;
FIG. 6 is an axial cross-sectional schematic view of the first desulfurization wheel, the second desulfurization wheel, or the third desulfurization wheel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Introduction of the structure of the present embodiment is an industrial flue gas desulfurization purification system as shown in fig. 1 to 6, which comprises an obliquely arranged desulfurization box 25, wherein two ends of the desulfurization box 25 are respectively supported by a first supporting piece 38 and a second supporting piece 37; the desulfurization box body 25 is of a long cylindrical structure; a hollow desulfurization channel is coaxially arranged in the cylinder body of the desulfurization box body 25; the device also comprises a flue gas inlet pipe 1 and a flue gas outlet pipe 12, wherein the outlet of the flue gas inlet pipe 1 is communicated with the upper side of the inclined high end of the hollow desulfurization channel, and the inlet of the flue gas outlet pipe 12 is communicated with the upper side of the inclined low end of the hollow desulfurization channel; the desulfurizer circulating pipe 24 is provided with a circulating pump 23, and the inlet end of the desulfurizer circulating pipe 24 is communicated with the lower side of the inclined short end of the hollow desulfurization channel; the outlet end of the desulfurizer circulating pipe 24 is communicated with the lower side of the inclined high end of the hollow desulfurization channel; further comprises a desulfurizer supply pipe 71 and a desulfurizer delivery pipe 74; the outlet of the desulfurizer supply pipe 71 is connected with the desulfurizer circulation pipe 24 in a bypass mode, and the inlet of the desulfurizer discharge pipe 74 is connected with the desulfurizer circulation pipe 24 in a bypass mode; the outlet of the desulfurizing agent supply pipe 71 and the inlet of the desulfurizing agent discharge pipe 74 are provided with a first valve 72 and a second valve 73, respectively.
The inner wall of the hollow desulfurization channel is integrally provided with a first convex ring wall 4, a second convex ring wall 8 and a third convex ring wall 11 from left to right in sequence; a feeding column cavity 2 is arranged on the left side of a first convex ring wall 4 in the hollow desulfurization channel, a first desulfurization column cavity 17 is arranged between the first convex ring wall 4 and a second convex ring wall 8 in the hollow desulfurization channel, a second desulfurization column cavity 20 is arranged between the second convex ring wall 8 and a third convex ring wall 11 in the hollow desulfurization channel, and a third desulfurization column cavity 22 is arranged on the right side of the third convex ring wall 11 in the hollow desulfurization channel; the upper end and the lower end of the feeding column cavity 2 are respectively communicated with the outlet of the flue gas inlet pipe 1 and the outlet of the desulfurizer circulating pipe 24; the upper end and the lower end of the third desulfurization column cavity 22 are respectively communicated with the inlet of the flue gas outlet pipe 12 and the inlet of the desulfurizer circulating pipe 24; a desulfurization rotor is also arranged in the desulfurization hollow channel in a coaxial rotating manner; the desulfurization device is characterized by further comprising a motor 15, wherein the motor 15 is in driving connection with the desulfurization rotor through a motor output shaft 14, and the motor 15 drives the desulfurization rotor to rotate through the motor output shaft 14.
The desulfurization rotor sequentially comprises a first cylinder 3, a first desulfurization wheel 5, a first stirring wheel 6, a second cylinder 7, a second desulfurization wheel 9, a second stirring wheel 10, a third cylinder 26 and a third desulfurization wheel 13 from left to right; the outer wall of the first cylinder 3 is coaxially matched with the inner wall of the first convex ring wall 4 in a sliding manner; the outer wall of the second cylinder 7 is coaxially and slidably matched with the inner wall of the second convex ring wall 8; the outer wall of the third cylinder 26 is coaxially and slidably matched with the inner wall of the third cam wall 11; the first desulfurization wheel 5 and the first stirring wheel 6 are coaxially suspended in the first desulfurization column cavity 17; the second desulfurization wheel 9 and the second stirring wheel 10 are coaxially suspended in the second desulfurization column cavity 20; the third desulfurization wheel 13 is coaxially suspended in the third desulfurization column cavity 22.
The first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 respectively comprise rollers 29, a cylindrical barrel cavity 33 is formed inside each roller 29, and a partition plate 34 is arranged at the right end of each cylindrical barrel cavity 33;
the first barrel 3, the second barrel 7 and the third barrel 26 are internally provided with a first channel 16, a second channel 18 and a third channel 21 respectively; the left ends of the cylinder cavities 33 in the first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 are respectively communicated with the right ends of the first channel 16, the second channel 18 and the third channel 21; the left ends of the first channel 16, the second channel 18 and the third channel 21 are respectively communicated with the right ends of the feeding column cavity 2, the first desulfurization column cavity 17 and the second desulfurization column cavity 20; a plurality of desulfurization holes 28 are uniformly distributed on the roller in a circumferential array, and the left end and the right end of the roller 29 are respectively and integrally provided with a left annular plate 27 and a right annular plate 31 along the outline; a plurality of outer water scooping blades 30 are distributed on the outer wall of the roller 29 in a circumferential array, the length direction of each outer water scooping blade 30 is parallel to the axis of the roller 29, two ends of each outer water scooping blade 30 extend to the left annular plate 27 and the right annular plate 31 which are integrally connected, and each outer water scooping blade 30 deflects 50 degrees to 70 degrees counterclockwise relative to the radial direction 171 of the roller 29, so that a water scooping groove 30.1 is formed between the outer water scooping blade 30 and the outer wall of the roller 29; a plurality of inner water scooping blades 32 are distributed on the inner wall of the roller 29 in a circumferential array, the length direction of each inner water scooping blade 32 is parallel to the axis of the roller 29, two ends of each inner water scooping blade 32 extend to the left annular plate 27 and the right annular plate 31 which are integrally connected, and the inner water scooping blades 32 are parallel to the radial direction 171 of the roller 29;
the first stirring wheel 6 and the second stirring wheel 10 are respectively provided with a plurality of U-shaped stirring rods 35 protruding outwards, and the U-shaped stirring rods 35 are distributed along the axis of the desulfurization rotor in a circumferential array; the left ends of the U-shaped stirring rods 35 on the first stirring wheel 6 are respectively and fixedly connected with the right annular plate 31 at the right end of the first desulfurization wheel 5, and the right ends of the U-shaped stirring rods 35 on the first stirring wheel 6 are respectively and fixedly connected with the left end of the second cylinder 7; the left ends of the U-shaped stirring rods 35 on the second stirring wheel 10 are respectively and fixedly connected with the right annular plate 31 at the right end of the second desulfurization wheel 9, and the right ends of the U-shaped stirring rods 35 on the second stirring wheel 10 are respectively and fixedly connected with the left end of the third cylinder 26.
The technical method, the process and the technical progress of the scheme are as follows:
the method comprises the following steps:
the second valve 73 is closed, the first valve 72 is opened, and the desulfurizer liquid is continuously supplied to the desulfurizer circulation pipe 24 by the desulfurizer supply pipe 71, wherein the desulfurizer liquid is lime slurry; and the circulating pump 23 is continuously started, at this time, the desulfurizer liquid in the desulfurizer circulating pipe 24 is guided into the feeding column cavity 2 under the action of the circulating pump 23, then the desulfurizer liquid in the feeding column cavity 2 overflows into the cylinder cavity 33 in the first desulfurization wheel 5 through the first channel 16 after being accumulated, and then the desulfurizer liquid in the cylinder cavity 33 of the first desulfurization wheel 5 overflows into the first desulfurization column cavity 17 through the plurality of desulfurization holes 28; then, the desulfurizer liquid in the first desulfurization column cavity 17 overflows into the cylinder cavity 33 in the second desulfurization wheel 9 through the second channel 18, and then the desulfurizer liquid in the cylinder cavity 33 of the second desulfurization wheel 9 overflows into the second desulfurization column cavity 20 through the plurality of desulfurization holes 28; then, the desulfurizer liquid in the second desulfurization column cavity 20 overflows into the cylinder cavity 33 in the third desulfurization wheel 13 through the third channel 21, and then the desulfurizer liquid in the cylinder cavity 33 of the third desulfurization wheel 13 overflows into the third desulfurization column cavity 22 through the plurality of desulfurization holes 28; finally, the desulfurizer liquid in the third desulfurization column cavity 22 returns to the desulfurizer circulation pipe 24 again, the supply of the desulfurizer liquid is cut off after the desulfurizer liquid is supplied to a predetermined amount by the desulfurizer supply pipe 71, the first valve 72 is closed, the running state of the circulation pump 23 is continuously maintained, and the circulation pump 23 enables the desulfurizer liquid in the desulfurization tank body 25 to form a circularly flowing "desulfurizer flowing internal circulation" in the above manner; by limiting the supply amount of the desulfurizer supply pipe 71, the liquid level of the desulfurizer liquid at any position in the desulfurization box body 25 is not higher than the axial height of the desulfurization box body 25, so that the flue gas in the hollow desulfurization channel can be ensured to be smooth;
meanwhile, the industrial flue gas discharge equipment presses the pressurized sulfur-containing flue gas into the upper part of the feeding column cavity 2 through the flue gas inlet pipe 1; then, the pressure-accumulated flue gas in the feeding column cavity 2 overflows into the cylinder cavity 33 in the first desulfurization wheel 5 through the first channel 16, and then the pressure-accumulated flue gas in the cylinder cavity 33 of the first desulfurization wheel 5 overflows into the first desulfurization column cavity 17 through the plurality of desulfurization holes 28 which are not immersed by liquid; then, the pressure-accumulating flue gas in the first desulfurization column cavity 17 overflows to the barrel cavity 33 in the second desulfurization wheel 9 through the second channel 18, and then the pressure-accumulating flue gas in the barrel cavity 33 of the second desulfurization wheel 9 overflows to the second desulfurization column cavity 20 through a plurality of desulfurization holes 28 which are not immersed by liquid; then, the pressure-accumulating flue gas in the second desulfurization column cavity 20 overflows into the barrel cavity 33 in the third desulfurization wheel 13 through the third channel 21, and then the pressure-accumulating flue gas in the barrel cavity 33 of the third desulfurization wheel 13 overflows into the third desulfurization column cavity 22 through a plurality of desulfurization holes 28 which are not immersed by liquid; finally, the flue gas in the third desulfurization column cavity 22 is led out through the flue gas outlet pipe 12;
meanwhile, the motor 15 is started, and then the motor 15 drives the desulfurization rotor to rotate continuously and anticlockwise through the motor output shaft 14, so that the first cylinder 3, the first desulfurization wheel 5, the first stirring wheel 6, the second cylinder 7, the second desulfurization wheel 9, the second stirring wheel 10, the third cylinder 26 and the third desulfurization wheel 13 synchronously rotate anticlockwise; the U-shaped stirring rods 35 on the first stirring wheel 6 and the second stirring wheel 10 effectively prevent the bottom of the right ends of the first desulfurization column cavity 17 and the second desulfurization column cavity 20 from generating precipitation retention; the U-shaped stirring rods 35 on the first stirring wheel 6 and the second stirring wheel 10 also play a role of a linkage structure;
in the process, the lower parts of the first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 are soaked in the desulfurizer liquid, and the liquid level of the desulfurizer liquid at the positions of the first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 is not higher than the height of the axis; therefore, the desulfurization holes 28 on the upper parts of the first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 are not submerged by liquid, and are unblocked;
on the basis of the above state, the first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 rotate counterclockwise continuously, so that the scooping grooves 30.1 on the roller 29 lift the scooped desulfurizer liquid up counterclockwise, and the rotation of the roller 29 causes the desulfurizer liquid in each scooping groove 30.1 to be subjected to centrifugal force, so that part of the desulfurizer liquid in each scooping groove 30.1 is radially thrown out in a centrifugal manner, and further, continuous desulfurizer centrifugal splashing liquid is generated in the first desulfurization column cavity 17, the second desulfurization column cavity 20 and the third desulfurization column cavity 22, so that the flue gas flowing through the first desulfurization column cavity 17, the second desulfurization column cavity 20 and the third desulfurization column cavity 22 is in full contact with the desulfurizer liquid; each outer water scooping blade 30 is deflected 50 degrees to 70 degrees in the counterclockwise direction relative to the radial direction 171 of the roller 29, the deflection angle enables water in the water scooping groove 30.1 to be restrained by the outer water scooping blades 30 while being subjected to centrifugal force, liquid in the water scooping groove 30.1 is prevented from being thrown out by all centrifugal force immediately after being separated from the liquid level, and the phenomenon of uneven liquid throwing is avoided;
meanwhile, after the plurality of inner water scooping blades 32 on the roller 29 scoop up the desulfurizer liquid counterclockwise, because the inner water scooping blades 32 are parallel to the radial direction 171 of the roller 29, the positions of the inner water scooping blades 32 at the height of the axis of the roller 29 become horizontal postures, and then the liquid scooped up by the inner water scooping blades 32 is lifted to the position of the axis of the roller 29 and then quickly overflows inwards, and after the liquid is overflowed, the liquid splashes upwards for a certain distance due to inertia, so that the desulfurizer liquid continuously splashed by inertia is generated in the cylinder cavity 33 in each roller 29, and further, the flue gas flowing through the cylinder cavity 33 of each roller 29 is fully contacted with the desulfurizer liquid;
in the process, the flue gas flowing through the first desulfurization column cavity 17, the second desulfurization column cavity 20 and the third desulfurization column cavity 22 is fully contacted with the centrifugally dispersed desulfurizer liquid; the flue gas flowing through the cylinder cavities 33 in the first desulfurization wheel 5, the second desulfurization wheel 9 and the third desulfurization wheel 13 is fully contacted with the desulfurizer liquid continuously splashed by inertia; the reaction occurs in the above process, SO2+ H2O → H2SO 3; CaCO3+ H2SO3 → CaSO3+ CO2+ H2O; so that the flue gas finally discharged from the flue gas discharge pipe 12 is desulfurized flue gas.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (2)
1. An industrial flue gas desulfurization clean system which characterized in that: the device comprises a desulfurization box body (25) which is obliquely arranged, wherein two ends of the desulfurization box body (25) are respectively supported by a first supporting piece (38) and a second supporting piece (37); the desulfurization box body (25) is of a long cylindrical structure; a hollow desulfurization channel is coaxially arranged in the cylinder body of the desulfurization box body (25); the device is characterized by also comprising a flue gas inlet pipe (1) and a flue gas outlet pipe (12), wherein the outlet of the flue gas inlet pipe (1) is communicated with the upper side of the inclined high end of the hollow desulfurization channel, and the inlet of the flue gas outlet pipe (12) is communicated with the upper side of the inclined low end of the hollow desulfurization channel; the desulfurizer circulation pipe (24) is arranged on the desulfurizer circulation pipe (24), and the inlet end of the desulfurizer circulation pipe (24) is communicated with the lower side of the inclined short end of the hollow desulfurization channel; the outlet end of the desulfurizer circulating pipe (24) is communicated with the lower side of the inclined high end of the hollow desulfurization channel; also comprises a desulfurizer supply pipe (71) and a desulfurizer eduction pipe (74); the outlet of the desulfurizer supply pipe (71) is connected with the desulfurizer circulation pipe (24) in a bypass mode, and the inlet of the desulfurizer discharge pipe (74) is connected with the desulfurizer circulation pipe (24) in a bypass mode; a first valve (72) and a second valve (73) are respectively arranged at the outlet of the desulfurizer supply pipe (71) and the inlet of the desulfurizer discharge pipe (74);
the inner wall of the hollow desulfurization channel is integrally provided with a first convex ring wall (4), a second convex ring wall (8) and a third convex ring wall (11) from left to right in sequence; a feeding column cavity (2) is arranged on the left side of a first convex ring wall (4) in the hollow desulfurization channel, a first desulfurization column cavity (17) is arranged between the first convex ring wall (4) and a second convex ring wall (8) in the hollow desulfurization channel, a second desulfurization column cavity (20) is arranged between the second convex ring wall (8) and a third convex ring wall (11) in the hollow desulfurization channel, and a third desulfurization column cavity (22) is arranged on the right side of the third convex ring wall (11) in the hollow desulfurization channel; the upper end and the lower end of the feeding column cavity (2) are respectively communicated with the outlet of the flue gas inlet pipe (1) and the outlet of the desulfurizer circulating pipe (24); the upper end and the lower end of the third desulfurization column cavity (22) are respectively communicated with the inlet of the flue gas eduction tube (12) and the inlet of a desulfurizer circulating tube (24); a desulfurization rotor is also arranged in the desulfurization hollow channel in a coaxial rotating manner; the desulfurization device is characterized by further comprising a motor (15), wherein the motor (15) is in driving connection with the desulfurization rotor through a motor output shaft (14), and the motor (15) drives the desulfurization rotor to rotate through the motor output shaft (14);
the desulfurization rotor sequentially comprises a first cylinder (3), a first desulfurization wheel (5), a first stirring wheel (6), a second cylinder (7), a second desulfurization wheel (9), a second stirring wheel (10), a third cylinder (26) and a third desulfurization wheel (13) from left to right; the outer wall of the first cylinder (3) is coaxially and slidably matched with the inner wall of the first convex ring wall (4); the outer wall of the second cylinder (7) is coaxially and slidably matched with the inner wall of the second convex ring wall (8); the outer wall of the third cylinder (26) is coaxially and slidably matched with the inner wall of the third convex ring wall (11); the first desulfurization wheel (5) and the first stirring wheel (6) are coaxially suspended in the first desulfurization column cavity (17); the second desulfurization wheel (9) and the second stirring wheel (10) are coaxially suspended in the second desulfurization column cavity (20); the third desulfurization wheel (13) is coaxially suspended in the third desulfurization column cavity (22);
the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) respectively comprise rollers (29), a cylindrical barrel cavity (33) is formed inside each roller (29), and a partition plate (34) is arranged at the right end of each cylindrical barrel cavity (33);
the interiors of the first cylinder (3), the second cylinder (7) and the third cylinder (26) are respectively provided with a first channel (16), a second channel (18) and a third channel (21); the left ends of barrel cavities (33) in the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) are respectively communicated with the right ends of a first channel (16), a second channel (18) and a third channel (21); the left ends of the first channel (16), the second channel (18) and the third channel (21) are respectively communicated with the right ends of the feeding column cavity (2), the first desulfurization column cavity (17) and the second desulfurization column cavity (20); a plurality of desulfurization holes (28) are uniformly distributed on the roller in a circumferential array, and a left annular plate (27) and a right annular plate (31) are respectively and integrally arranged at the left end and the right end of the roller (29) along the outline; a plurality of outer water scooping blades (30) are distributed on the outer wall of the roller (29) in a circumferential array manner, the length direction of each outer water scooping blade (30) is parallel to the axis of the roller (29), two ends of each outer water scooping blade (30) extend to the left annular plate (27) and the right annular plate (31) which are integrally connected, and each outer water scooping blade (30) deflects 50 degrees to 70 degrees counterclockwise relative to the radial direction (171) of the roller (29), so that a water scooping groove (30.1) is formed between each outer water scooping blade (30) and the outer wall of the roller (29); a plurality of inner water scooping blades (32) are distributed on the inner wall of the roller (29) in a circumferential array manner, the length direction of each inner water scooping blade (32) is parallel to the axis of the roller (29), two ends of each inner water scooping blade (32) extend to the left annular plate (27) and the right annular plate (31) which are integrally connected, and the inner water scooping blades (32) are parallel to the radial direction (171) of the roller (29); the first stirring wheel (6) and the second stirring wheel (10) are respectively provided with a plurality of U-shaped stirring rods (35) protruding outwards, and the U-shaped stirring rods (35) are distributed along the axis of the desulfurization rotor in a circumferential array; the left ends of the U-shaped stirring rods (35) on the first stirring wheel (6) are respectively and fixedly connected with a right annular plate (31) at the right end of the first desulfurization wheel (5), and the right ends of the U-shaped stirring rods (35) on the first stirring wheel (6) are respectively and fixedly connected with the left end of the second cylinder (7); the left ends of the U-shaped stirring rods (35) on the second stirring wheel (10) are respectively and fixedly connected with the right annular plate (31) at the right end of the second desulfurization wheel (9), and the right ends of the U-shaped stirring rods (35) on the second stirring wheel (10) are respectively and fixedly connected with the left end of the third cylinder (26).
2. The desulfurization and purification method of the industrial flue gas desulfurization and purification system according to claim 1, characterized in that: the method comprises the following steps:
closing the second valve (73), opening the first valve (72), and continuously supplying a desulfurizer liquid to the desulfurizer circulating pipe (24) by the desulfurizer supply pipe (71), wherein the desulfurizer liquid is lime slurry; and the circulating pump (23) is continuously started, at the moment, the desulfurizer liquid in the desulfurizer circulating pipe (24) is guided into the feeding column cavity (2) under the action of the circulating pump (23), then the desulfurizer liquid in the feeding column cavity (2) overflows into the cylinder cavity (33) in the first desulfurization wheel (5) through the first channel (16) after being accumulated, and then the desulfurizer liquid in the cylinder cavity (33) of the first desulfurization wheel (5) overflows into the first desulfurization column cavity (17) through the plurality of desulfurization holes (28); then, the desulfurizer liquid in the first desulfurization column cavity (17) overflows into a cylinder cavity (33) in the second desulfurization wheel (9) through a second channel (18), and then the desulfurizer liquid in the cylinder cavity (33) of the second desulfurization wheel (9) overflows into a second desulfurization column cavity (20) through a plurality of desulfurization holes (28); then, the desulfurizer liquid in the second desulfurization column cavity (20) overflows into a barrel cavity (33) in a third desulfurization wheel (13) through a third channel (21), and then the desulfurizer liquid in the barrel cavity (33) of the third desulfurization wheel (13) overflows into a third desulfurization column cavity (22) through a plurality of desulfurization holes (28); finally, the desulfurizer liquid in the third desulfurization column cavity (22) returns to the desulfurizer circulation pipe (24) again, the supply of the desulfurizer liquid is cut off after the desulfurizer liquid is supplied to a preset amount by the desulfurizer supply pipe (71), the first valve (72) is closed, the running state of the circulating pump (23) is continuously maintained, and then the circulating pump (23) enables the desulfurizer liquid in the desulfurization tank body (25) to form a circularly flowing 'desulfurizer flowing internal circulation' according to the mode; the liquid level of the desulfurizer liquid at any position in the desulfurization box body (25) is not higher than the axial height of the desulfurization box body (25) by limiting the supply quantity of the desulfurizer supply pipe (71), so that the flue gas in the hollow desulfurization channel can be ensured to be smooth;
meanwhile, the pressurized sulfur-containing flue gas is pressed into the upper part in the feeding column cavity (2) by the industrial flue gas discharge equipment through the flue gas inlet pipe (1); then the pressure-accumulating flue gas in the feeding column cavity (2) overflows into a cylinder cavity (33) in the first desulfurization wheel (5) through a first channel (16), and then the pressure-accumulating flue gas in the cylinder cavity (33) of the first desulfurization wheel (5) overflows into a first desulfurization column cavity (17) through a plurality of desulfurization holes (28) which are not immersed by liquid; then, the pressure-accumulating flue gas in the first desulfurization column cavity (17) overflows to a barrel cavity (33) in the second desulfurization wheel (9) through a second channel (18), and then the pressure-accumulating flue gas in the barrel cavity (33) of the second desulfurization wheel (9) overflows to a second desulfurization column cavity (20) through a plurality of desulfurization holes (28) which are not immersed by liquid; then, the pressure-accumulating flue gas in the second desulfurization column cavity (20) overflows to a barrel cavity (33) in a third desulfurization wheel (13) through a third channel (21), and then the pressure-accumulating flue gas in the barrel cavity (33) of the third desulfurization wheel (13) overflows to a third desulfurization column cavity (22) through a plurality of desulfurization holes (28) which are not immersed by liquid; finally, the flue gas in the third desulfurization column cavity (22) is led out through a flue gas leading-out pipe (12);
meanwhile, the motor (15) is started, and then the motor (15) drives the desulfurization rotor to rotate continuously and anticlockwise through the motor output shaft (14), so that the first cylinder (3), the first desulfurization wheel (5), the first stirring wheel (6), the second cylinder (7), the second desulfurization wheel (9), the second stirring wheel (10), the third cylinder (26) and the third desulfurization wheel (13) synchronously rotate anticlockwise; u-shaped stirring rods (35) on the first stirring wheel (6) and the second stirring wheel (10) effectively prevent the bottom of the right ends of the first desulfurization column cavity (17) and the second desulfurization column cavity (20) from generating precipitation retention; the U-shaped stirring rods (35) on the first stirring wheel (6) and the second stirring wheel (10) also play a role of a linkage structure;
in the process, the lower parts of the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) are soaked in the desulfurizer liquid, and the liquid level of the desulfurizer liquid at the positions of the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) is not higher than the height of the axis; therefore, the desulfurization holes (28) on the upper parts of the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) are not submerged by liquid and are unblocked;
on the basis of the above state, the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) continuously rotate anticlockwise, so that the scooping water tank (30.1) on the roller (29) lifts the scooped desulfurizer liquid upwards along the anticlockwise direction, the desulfurizer liquid in each scooping water tank (30.1) is subjected to centrifugal force due to the rotation of the roller (29), and then part of the desulfurizer liquid in each scooping water tank (30.1) is radially and outwards thrown out in a centrifugal mode, so that continuous desulfurizer centrifugal splashing liquid is generated in the first desulfurization column cavity (17), the second desulfurization column cavity (20) and the third desulfurization column cavity (22), and further, flue gas flowing through the first desulfurization column cavity (17), the second desulfurization column cavity (20) and the third desulfurization column cavity (22) is fully contacted with the desulfurizer liquid; each outer water scooping blade (30) deflects 50-70 degrees counterclockwise relative to the radial direction (171) of the roller (29), the deflection angle enables water in the water scooping groove (30.1) to be restrained by the outer water scooping blades (30) while being subjected to centrifugal force, liquid in the water scooping groove (30.1) is prevented from being thrown out by all centrifugal force immediately after being separated from the liquid level, and the phenomenon of uneven liquid throwing is avoided;
meanwhile, after the desulfurizer liquid is scooped up by the plurality of inner water scooping blades (32) on the roller (29) anticlockwise, because the inner water scooping blades (32) are parallel to the radial direction (171) of the roller (29), the positions of the inner water scooping blades (32) and the axis of the roller (29) are changed into horizontal postures, the liquid scooped up by the inner water scooping blades (32) is lifted to the position of the axis of the roller (29) and then quickly overflows inwards, and after the liquid is overflowed, the liquid is splashed upwards for a certain distance due to inertia, so that the desulfurizer liquid continuously splashed by inertia can be generated in the barrel cavity (33) in each roller (29), and further, the flue gas flowing through the barrel cavity (33) of each roller (29) is fully contacted with the desulfurizer liquid;
in the process, the flue gas flowing through the first desulfurization column cavity (17), the second desulfurization column cavity (20) and the third desulfurization column cavity (22) is fully contacted with the centrifugally dispersed desulfurizer liquid; the flue gas flowing through the cylinder cavities (33) in the first desulfurization wheel (5), the second desulfurization wheel (9) and the third desulfurization wheel (13) is fully contacted with the desulfurizer liquid continuously splashed by inertia; the reaction occurs in the above process, SO2+ H2O → H2SO 3; CaCO3+ H2SO3 → CaSO3+ CO2+ H2O; thereby leading the flue gas finally led out from the flue gas leading-out pipe (12) to be the flue gas after desulfurization.
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| CN111644044B (en) * | 2020-05-29 | 2022-03-01 | 莱芜金山矿产资源有限公司 | Exhaust gas desulfurization purification system and exhaust gas purification method |
| CN114618275A (en) * | 2021-12-16 | 2022-06-14 | 南通普瑞特机械有限公司 | Chemical industry reation kettle of waste gas rotary type preliminary treatment |
| CN117160215A (en) * | 2023-09-11 | 2023-12-05 | 苏州特福佳实验室系统工程有限公司 | Multi-stage desulfurization spray tower for flue gas purification |
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| CN109351169A (en) * | 2018-12-24 | 2019-02-19 | 陆炯 | Flue gas desulfurization device and its sulfur method |
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| FR2733696A1 (en) * | 1995-05-04 | 1996-11-08 | Delberghe Cecile | Venturi gas scrubber, for cleaning exhaust gases with irregular flow |
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