CN110841424A - Three-section type hypergravity ship tail gas treatment device and working method - Google Patents
Three-section type hypergravity ship tail gas treatment device and working method Download PDFInfo
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- CN110841424A CN110841424A CN201911080424.2A CN201911080424A CN110841424A CN 110841424 A CN110841424 A CN 110841424A CN 201911080424 A CN201911080424 A CN 201911080424A CN 110841424 A CN110841424 A CN 110841424A
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- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
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- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
- B01D47/025—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by contacting gas and liquid with a static flow mixer
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention discloses a three-section type hypergravity ship tail gas treatment device, which is based on a hypergravity reaction, completes the dust removal, desulfurization and white elimination processes of ship tail gas in three reaction chambers through a rotating mechanism respectively, microscopically and uniformly mixes gas and liquid, improves the mass transfer rate in the reaction process, has the purification efficiency of 99 percent, strengthens the gas and liquid mixing and reaction by a distribution rod structure on the rotating mechanism, and obtains the removal efficiency higher than that of an impeller type rotating device, a silk screen and a filler type rotating device.
Description
Technical Field
The invention relates to a ship tail gas treatment device and a working method of the device.
Background
The activity and prosperity of the water transportation industry are important factors for promoting the economic development of China, but along with the economic development,the environmental pollution caused by the ship tail gas is increasingly serious and reaches a non-negligible degree. At present, the engine of a ship mainly comprises a diesel engine, the fuel mainly comprises heavy oil, and a large amount of waste residues and sulfides can be generated due to insufficient combustion of the heavy oil in the diesel engine. According to incomplete statistics, the SO discharged by ocean-going ships every year in the world2The total amount is 4.7-6.5 Tg, which accounts for 8% of the artificial emission, and if the tail gas is directly discharged into the atmosphere, serious air pollution can be caused.
SO in the atmosphere2When the concentration is too high, a plurality of inflammations such as bronchitis, emphysema and corneal inflammation can be caused, after the requirement of the Maritime Environmental Protection Committee (MEPC) of the International Maritime Organization (IMO) for 2020, a newly-built ship strictly executes the GB15097-2016 ship tail gas emission standard, and the sulfur emission in a control area is less than 0.1%. Therefore, the dust removal and desulfurization of the ship tail gas are urgent. However, most of the traditional desulfurization methods utilize a spray tower type flue gas desulfurization device, and have the disadvantages of large occupied area and serious resource waste.
Meanwhile, the treated flue gas contains a large amount of moisture and high temperature, so a large amount of white fog is generated when the flue gas is discharged into the atmosphere, the beautifying of the surrounding environment is seriously affected, and water resources are wasted.
Disclosure of Invention
The purpose of the invention is as follows: in view of the above problems, the present invention provides a ship tail gas treatment device, which solves the problems of incomplete tail gas treatment, long treatment time, low efficiency, large equipment volume and high operation cost of the conventional reactor, and provides a working method of the device.
The technical scheme is as follows: a three-section type hypergravity ship tail gas treatment device comprises a first reaction chamber, a second reaction chamber, a third reaction chamber, a rotating mechanism and a rotary driving source; each reaction chamber is internally provided with a rotating mechanism, one end of a hollow rotating shaft of the rotating mechanism is arranged on the wall surface of the reaction chamber in a penetrating way and is connected with an external rotating driving source, the other end of the hollow rotating shaft is butted with a sealing device fixed on the wall surface of the reaction chamber, the hollow rotating shaft is positioned at the part in the reaction chamber, the wall surface of the hollow rotating shaft is provided with a spraying hole, and the outer wall surface of the hollow rotating shaft is provided with; all insert intake pipe to hollow rotating shaft in on the sealing device of each reaction chamber, first reaction chamber, insert inlet tube to hollow rotating shaft in on the sealing device of second reaction chamber, the sea water even goes into the inlet tube, the intake pipe, the inlet tube is located the part of hollow rotating shaft, it has the gas pocket to correspond to set up on its wall, the water hole, the gas outlet has all been seted up on the upper portion wall of each reaction chamber, waste liquid outlet has all been seted up on the lower wall, boats and ships tail gas even goes into the intake pipe of first reaction chamber, the gas outlet of first reaction chamber and the air inlet intercommunication of second reaction chamber, the gas outlet of second reaction chamber and the air inlet intercommunication of third reaction chamber.
Further, a rotary driving source connected with the rotary mechanism in the first reaction chamber, wherein the rotating speed of the rotary driving source is 500-2000 r/min; a rotation driving source connected with the rotation mechanism in the second reaction chamber, wherein the rotation speed of the rotation driving source is 800-20000 r/min; and the rotating driving source is connected with the rotating mechanism in the third reaction chamber, and the rotating speed of the rotating driving source is 500-3000 r/min. To provide a basis for a hypergravity reaction.
Furthermore, in the first reaction chamber, the spraying density of the hollow rotating shaft is 0.1-0.3, and the gas-liquid flow ratio is 200-1000; in the second reaction chamber, the spraying density of the hollow rotating shaft is 0.3-0.6, and the gas-liquid flow ratio is 100-200.
Furthermore, the distribution rod comprises a main rod fixed on the outer wall surface of the hollow rotating shaft and a needle rib fixed on the main rod.
Furthermore, the main rods are fixed perpendicular to the outer wall surface of the hollow rotating shaft, and the main rods are arranged on the outer wall surface of the hollow rotating shaft at intervals in a matrix manner and are alternately arranged by long rods and short rods; the needle ribs are fixed perpendicular to the outer wall surface of the main rod, the needle ribs are arranged on the outer wall surface of the main rod at intervals in a matrix mode, and the length of the needle ribs is increased or decreased progressively or is arranged at equal length along the length direction of the main rod.
Furthermore, the distribution rods in the first reaction chamber have the main rods arranged on the outer wall surface of the hollow rotating shaft at intervals of 10-500 mm, the needle ribs arranged on the outer wall surface of the long main rod at intervals of 5-250 mm, and the short main rod at intervals of 3-150 mm; the distance between the main rods and the outer wall surface of the hollow rotating shaft is 5-200 mm, the distance between the needle ribs and the outer wall surface of the long main rod is 3-100 mm, and the distance between the needle ribs and the outer wall surface of the short main rod is 3-80 mm; the distance between the main rods and the outer wall surface of the hollow rotating shaft is 5-230 mm, the distance between the needle ribs and the outer wall surface of the long main rod is 5-200 mm, and the distance between the needle ribs and the outer wall surface of the short main rod is 3-100 mm;
furthermore, the main rod is arranged on the outer wall surface of the hollow rotating shaft at intervals in a triangular matrix or rectangular matrix mode, and the pin ribs are arranged on the outer wall surface of the main rod at intervals in a triangular matrix or rectangular matrix mode.
Furthermore, the hollow rotating shaft of the rotating mechanism is arranged transversely or vertically.
Furthermore, in each reaction chamber, a connecting rod is arranged between the distribution rods for fixing and supporting so as to ensure the connection strength between the distribution rods and the hollow main shaft.
The working method of the three-section type hypergravity ship tail gas treatment device comprises the following steps:
s100: in the first reaction chamber, seawater enters the hollow rotating shaft from the water inlet pipe through the water hole, ship tail gas enters the hollow rotating shaft from the air inlet pipe through the air hole, is mixed in the hollow rotating shaft, then enters the reaction chamber from the hollow rotating shaft through the spraying hole, rotates along with the rotating mechanism, and is acted by the distribution rod under the super-gravity environment, impurities in the ship tail gas are discharged from the waste liquid outlet along with the seawater, and the primary clean waste gas enters the second reaction chamber from the air outlet;
s200: in the second reaction chamber, seawater enters the hollow rotating shaft from the water inlet pipe through the water hole, primary clean waste gas enters the hollow rotating shaft from the air inlet pipe through the air hole, is mixed in the hollow rotating shaft, then enters the reaction chamber from the hollow rotating shaft through the spraying hole, rotates along with the rotating mechanism, and is acted by the distribution rod under the super-gravity environment, sulfides in the primary clean waste gas are adsorbed by the seawater and then are discharged from the waste liquid outlet, and the secondary clean waste gas enters the third reaction chamber from the air outlet;
s300: in the third reaction chamber, the clean waste gas of follow gets into hollow pivot through the gas pocket from the intake pipe, again from hollow pivot through spraying the hole and get into in the reaction chamber, the steam that carries in the clean waste gas of follow, along with rotary mechanism is rotatory, through the effect of distribution rod under the hypergravity environment, is got rid of on the reaction chamber wall, then discharges from the waste liquid export under the action of gravity, and tail gas purification is discharged from the gas outlet.
Has the advantages that: compared with the prior art, the invention has the advantages that: 1. the device is based on the supergravity reaction, the centrifugal acceleration generated by the rotating driving source driving the rotating mechanism can reach 20-500 times of the gravity acceleration, under the action of the centrifugal force field, the gas-liquid relative movement speed is increased, the interphase contact area is greatly increased and rapidly updated, the gas and the liquid are uniformly mixed on the microcosmic surface, the mass transfer rate in the reaction process can be increased by 1-2 orders of magnitude, the processing time is reduced, and the volume of the equipment can be reduced; 2. by the treatment of the device, the processes of dust removal, desulfurization and white elimination of the ship tail gas are more thorough, the tail gas emission is cleaner, and the purification efficiency can reach 99%; 3. the distribution rod structure on the rotating mechanism strengthens gas-liquid mixing and reaction, particularly strengthens gas-liquid mixing and reaction near the hollow rotating shaft, obtains removal efficiency at least 3-5% higher than that of an impeller type rotating device, has lower cost than the impeller type rotating device, is more convenient to process and maintain, obtains removal efficiency at least 5-10% higher than that of a silk screen and a filler type rotating device, and solves the problems of instability, easy scattering and the like of the silk screen and the filler type rotating device in a supergravity environment; the rotary mechanism with the distribution rod type avoids the problem of being blocked by tail gas dust and calcium and magnesium precipitates generated in the desulfurization process; 4. the invention adopts a three-section type integrated device, has small volume and stronger stability, is not influenced by the swinging and the oscillation of the ship, greatly saves the occupied area of equipment, reduces the energy consumption and is beneficial to the reasonable utilization of the space of the ship; 5. the device of the invention adopts seawater as a reaction raw material, has rich sources, reduces the operation cost and reduces the procedures and cost of post-treatment.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partial view of the hollow shaft and the spray holes formed therein;
FIG. 3 is a partial expanded view of the surface of the air inlet tube and the air holes formed therein;
FIG. 4 is a partial view showing the surface of the water inlet pipe and the water holes formed therein.
Detailed Description
The invention will be further elucidated with reference to the drawings and specific examples, which are intended to illustrate the invention and are not intended to limit the scope of the invention.
A three-section type hypergravity ship tail gas treatment device is shown in figure 1 and comprises a first reaction chamber 1, a second reaction chamber 2 and a third reaction chamber 3.
The first reaction chamber 1 is internally provided with a rotating mechanism 11 consisting of a hollow rotating shaft 111 and a distribution rod 112, the hollow rotating shaft 111 is vertically arranged (or transversely arranged), the lower end of the hollow rotating shaft 111 is arranged on the wall surface of the first reaction chamber 1 in a penetrating way, a bearing and a sealing head are arranged at the penetrating part, one end of the hollow rotating shaft 111 extending out of the first reaction chamber 1 is connected with a rotating driving source 15 through a coupler, the rotating driving source 15 drives the hollow rotating shaft 111 to rotate in the first reaction chamber 1, the upper end of the hollow rotating shaft 111 is butted with a sealing device 14 fixed on the wall surface of the first reaction chamber 1, the sealing device 14 can be a stuffing box, the inner wall surface of the upper end of the hollow rotating shaft 111 is positioned outside the outer wall surface of the sealing device 14, a small amount of gap is kept between the hollow rotating shaft and the sealing device 14, the upper end of the hollow rotating shaft 111 can be sealed without interfering the rotation of, to support the upper end of the hollow rotating shaft 111. The hollow rotating shaft 111 is positioned in the first reaction chamber 1, and the wall surface thereof is provided with spraying holes 113 as shown in figure 2, and the spraying density is 0.1-0.3. The distribution rod 112 includes a long main rod 1121, a short main rod 1122, and a needle rib 1123; the long main rods 1121 and the short main rods 1122 are fixed perpendicular to the outer wall surface of the hollow rotating shaft 111, the long main rods 1121 and the short main rods 1122 are alternated, and are arranged on the outer wall surface at intervals of a triangular matrix or a rectangular matrix, and the interval distance is 10-500 mm; the pin ribs 1123 are fixed perpendicular to the outer wall surfaces of the long main rod 1121 and the short main rod 1122, are arranged on the outer wall surfaces at intervals in a triangular matrix or rectangular matrix, and are spaced at a distance of 5-250 mm on the outer wall surface of the long main rod 1121 and at a distance of 3-150 mm on the outer wall surface of the short main rod 1122; the needle ribs 1123 are arranged in an increasing or decreasing or equal length along the respective length directions of the long main rod 1121 and the short main rod 1122. The distributing rods 112 are fixedly supported by connecting rods 16. An air inlet pipe 12 is inserted into the sealing device 14, the water inlet pipe 13 extends into the hollow rotating shaft 111, one end of the water inlet pipe 13, which extends out of the first reaction chamber 1, is a seawater inlet 131, seawater is connected into the water inlet pipe 13 from the seawater inlet 131, the water inlet pipe 13 is positioned in the hollow rotating shaft 111, a water hole 132 shown in the attached drawing 4 is correspondingly formed in the wall surface of the water inlet pipe, one end of the air inlet pipe 12, which extends out of the first reaction chamber 1, is a tail gas inlet 121, ship tail gas is connected into the air inlet pipe 12 from the tail gas inlet 121, the air inlet pipe 12 is positioned in the hollow rotating shaft 111, and an air hole 122 shown. The upper wall of the first reaction chamber 1 is provided with an air outlet 17, and the lower wall is provided with a waste liquid outlet 18. The rotation speed of the rotation driving source 15 is 500 to 2000 r/min.
A rotating mechanism 21 composed of a hollow rotating shaft 211 and a distribution rod 212 is arranged in the second reaction chamber 2, the hollow rotating shaft 211 is vertically arranged (or can be horizontally arranged), the lower end of the hollow rotating shaft 211 penetrates through the wall surface of the second reaction chamber 2, a bearing and a sealing head are arranged at the penetrating part, one end of the hollow rotating shaft 211 extending out of the second reaction chamber 2 is connected with a rotating driving source 25 through a coupler, the rotating driving source 25 drives the hollow rotating shaft 211 to rotate in the second reaction chamber 2, the upper end of the hollow rotating shaft 211 is butted with a sealing device 24 fixed on the wall surface of the second reaction chamber 2, the sealing device 24 can be a packing box, the inner wall surface at the upper end of the hollow rotating shaft 211 is positioned outside the outer wall surface of the sealing device 24, a small amount of gap is kept between the sealing device and the sealing device 24, the upper end of the hollow rotating shaft 211 can be sealed without interfering the rotation of the hollow rotating shaft 211, to support the upper end of the hollow rotary shaft 211. The hollow rotating shaft 211 is located in the second reaction chamber 2, and has spraying holes 213 on its wall surface, and the spraying density is 0.3-0.6. Distribution rod 212 includes a long main rod 2121, a short main rod 2122, and a needle rib 2123; the long main rods 2121 and the short main rods 2122 are fixed perpendicular to the outer wall surface of the hollow rotating shaft 211, the long main rods 2121 and the short main rods 2122 are arranged alternately, and the outer wall surface is arranged at intervals of a triangular matrix or a rectangular matrix, and the interval distance is 5-200 mm; the pin ribs 2123 are perpendicular to the outer wall surfaces of the long main rod 2121 and the short main rod 2122 and are fixed, the outer wall surfaces are arranged at intervals in a triangular matrix or rectangular matrix, the interval distance on the outer wall surface of the long main rod 2121 is 3-100 mm, and the interval distance on the outer wall surface of the short main rod 2122 is 3-80 mm; the needle ribs 2123 are arranged in an increasing or decreasing or equal length along the respective length directions of the long main rod 2121 and the short main rod 2122. The distributing rods 212 are fixedly supported by the connecting rods 26. Insert intake pipe 22 on sealing device 24, inlet tube 23 to hollow pivot 211 in, the one end that inlet tube 23 stretches out outside second reaction chamber 2 is sea water import 231, the sea water is even into inlet tube 23 from sea water import 231, inlet tube 23 is located the part of hollow pivot 211, it has seted up water hole 232 to correspond on its wall, the one end that intake pipe 22 stretches out outside second reaction chamber 2 is just net gas import 221, intake pipe 22 is located the part of hollow pivot 211, seted up gas pocket 222 on its wall. The upper wall of the second reaction chamber 2 is provided with an air outlet 27, and the lower wall is provided with a waste liquid outlet 28. The rotation speed of the rotation driving source 25 is 800 to 20000 r/min.
A rotating mechanism 31 composed of a hollow rotating shaft 311 and a distribution rod 312 is arranged in the third reaction chamber 3, the hollow rotating shaft 311 is vertically arranged (or can be transversely arranged), the lower end of the hollow rotating shaft 311 is arranged on the wall surface of the third reaction chamber 3 in a penetrating way, a bearing and a sealing head are arranged at the penetrating part, one end of the hollow rotating shaft 311 extending out of the third reaction chamber 3 is connected with a rotating driving source 35 through a coupler, the rotating driving source 35 drives the hollow rotating shaft 311 to rotate in the third reaction chamber 3, the upper end of the hollow rotating shaft 311 is butted with a sealing device 34 fixed on the wall surface of the third reaction chamber 3, the sealing device 34 can be a packing box, the inner wall surface at the upper end of the hollow rotating shaft 311 is positioned outside the outer wall surface of the sealing device 34, a small amount of gap is kept between the sealing device 34 and the sealing device, the upper end of the hollow rotating shaft 311 can be sealed without interfering the, to support the upper end of the hollow rotating shaft 311. The hollow shaft 311 is provided in the third reaction chamber 3 with shower holes 313 formed in the wall surface thereof. The distribution rod 312 includes a long main rod 3121, a short main rod 3122, and a needle rib 3123; the long main rods 3121 and the short main rods 3122 are fixed perpendicular to the outer wall surface of the hollow rotating shaft 311, the long main rods 3121 and the short main rods 3122 are alternated, and are arranged on the outer wall surface at intervals of a triangular matrix or a rectangular matrix, and the interval distance is 5-230 mm; the pin ribs 3123 are fixed perpendicular to the outer wall surfaces of the long main rod 3121 and the short main rod 3122, and are arranged at intervals in a triangular matrix or a rectangular matrix on the outer wall surface, the interval distance on the outer wall surface of the long main rod 3121 is 5-200 mm, and the interval distance on the outer wall surface of the short main rod 3122 is 3-100 mm; the needle ribs 3123 are arranged in an increasing or decreasing length or equal length along the respective length directions of the long main rod 3121 and the short main rod 3122. The distributing rods 312 are fixedly supported by the connecting rods 36. The sealing device 34 is inserted into the air inlet pipe 32 to the hollow rotating shaft 211, the end of the air inlet pipe 32 extending out of the third reaction chamber 3 is a clean air inlet 321, the air inlet pipe 32 is located in the hollow rotating shaft 311, and the wall surface of the air inlet pipe is provided with an air hole 322. The upper wall of the third reaction chamber 3 is provided with an air outlet 37, and the lower wall is provided with a waste liquid outlet 38. The rotation speed of the rotation driving source 35 is 500 to 3000 r/min.
The air outlet 17 and the initial clean air inlet 221 which pass through the first reaction chamber 1 and the second reaction chamber 2 are communicated, the air outlet 27 and the secondary clean air inlet 321 which pass through the second reaction chamber 2 and the third reaction chamber 3 are communicated, and pipelines can be arranged to be connected to form communication, so that a three-section type integrated device is formed.
The rotational speed of each rotary drive source to ensure that the centrifugal acceleration generated by rotation provides the basis for the supergravity reaction may be a three-phase asynchronous motor.
The invention relates to a three-section type hypergravity ship tail gas treatment device, which comprises the following working steps:
s100: seawater is connected into a water inlet pipe 13 from a seawater inlet 131, enters a hollow rotating shaft 111 through a water hole 132, ship tail gas is connected into an air inlet pipe 12 from a tail gas inlet 121, enters the hollow rotating shaft 111 through an air hole 122, is mixed in the hollow rotating shaft 111, is sprayed out in an atomized form from the hollow rotating shaft 111 through a spraying hole 113, enters a first reaction chamber 1, the gas-liquid flow ratio of the seawater and the ship tail gas is controlled to be 200-1000, in the first reaction chamber 1, a rotating mechanism 11 is driven by a rotating driving source 15 to rotate at a rotating speed of 500-2000 r/min to drive the ship tail gas and the seawater to be fully mixed, the seawater and the seawater reach supergravity acceleration, the seawater is further torn and pulled into finer liquid drops under the action of a distribution rod under the supergravity environment, the surface area of the seawater is increased, the seawater and the ship tail gas are more fully contacted, and the density difference between impurities in the ship tail gas and the seawater is, therefore, under the effect of supergravity, most of dust in the ship tail gas is adsorbed by seawater and then is discharged out of the first reaction chamber 1 from the waste liquid outlet 18, so that the aim of dedusting the ship tail gas is fulfilled, and the obtained primary clean waste gas is discharged out of the first reaction chamber 1 from the gas outlet 17.
S200: seawater is connected into a water inlet pipe 23 from a seawater inlet 231, enters a hollow rotating shaft 211 through a water hole 232, primary clean waste gas is connected into an air inlet pipe 22 from a primary clean gas inlet 221, enters the hollow rotating shaft 211 through an air hole 222, is mixed in the hollow rotating shaft 211, is sprayed out in an atomized form from the hollow rotating shaft 211 through a spraying hole 213, enters a second reaction chamber 2, the gas-liquid flow ratio of the seawater and ship tail gas is controlled to be 100-200, in the second reaction chamber 2, a rotating mechanism 21 is driven by a rotating driving source 25 to rotate at the rotating speed of 800-20000 r/min to drive the primary clean waste gas and the seawater to be fully mixed, the seawater and the seawater reach the supergravity acceleration, the seawater is subjected to the action of a distribution rod under the supergravity environment, can be further torn and pulled into finer liquid drops, the surface area of the seawater is increased, the contact between the seawater and the primary clean waste gas is more sufficient, and sulfide gas in the primary clean waste gas is adsorbed by, and then discharged from the waste liquid outlet 28 to the second reaction chamber 2, thereby achieving the purpose of desulfurizing the ship tail gas, and the obtained re-purified waste gas is discharged from the gas outlet 27 to the second reaction chamber 2.
S300: the re-purified waste gas is connected into the gas inlet pipe 32 from the re-purified gas inlet 321, enters the hollow rotating shaft 311 through the gas hole 322, and then enters the third reaction chamber 3 from the hollow rotating shaft 311 through the spraying hole 313, because the re-purified waste gas is obtained by the ship tail gas contacting with the seawater from the first reaction chamber and the second reaction chamber for dust removal and desulfurization, the re-purified waste gas carries the water vapor, in the third reaction chamber 3, the rotating mechanism 31 rotates at the rotating speed of 500-3000 r/min under the driving of the rotating driving source 35, the re-purified waste gas carrying the water vapor is driven to reach the supergravity acceleration, the seawater is acted by the distribution rod under the supergravity environment, and the density difference between the water and the gas, under the supergravity action, the water can be separated from the gas by the larger centrifugal force, and is thrown onto the wall surface of the third reaction chamber 3, and then is discharged out of the third reaction chamber 3 from the waste liquid outlet 38 under the gravity action, thereby achieving the purpose of eliminating white waste gas, and the obtained purified tail gas is discharged from the third reaction chamber 3 from the gas outlet 37 and is discharged into the atmosphere.
The ship tail gas is subjected to the dust removal, desulfurization and white elimination effects of the three reaction chambers, and the obtained purified tail gas basically reaches the emission standard.
For the structure of the distribution rods on the rotating mechanism, the acceleration obtained by the gas and the seawater at the inner sides (namely the sides connected with the hollow rotating shafts) of the long main rods and the short main rods is smaller relative to the outer sides, the length of the needle ribs arranged at the inner sides is larger than that at the outer sides, the gas-liquid mixing degree at the inner sides and the outer sides is balanced, and the seawater is in contact with the gas and is mixed more fully and uniformly.
For example: the air inflow of the tail gas of the sulfur-containing ship is 1500m3H, in which SO2The concentration is 850mg/m3(ii) a In the first reaction chamber, the spraying density is 0.25, and the flow rate of seawater is 1.5m3The rotating speed of a rotary driving source is 1500r/min, the main rods are arranged at intervals in a triangular matrix, the spacing distance is 15mm, the length of the long main rod is 150mm, the length of the short main rod is 90mm, the needle ribs are arranged at intervals in a triangular matrix on the long main rod, the spacing distance is 7mm, the length of the needle ribs is gradually reduced from 15mm to 10mm from the inner side to the outer side of the long main rod, the needle ribs are arranged at intervals in a triangular matrix on the short main rod, the spacing distance is 5mm, and the lengths of the needle ribs are equal to; in the second reaction chamber, the spraying density is 0.5, and the flow rate of seawater is 15m3The rotating speed of a rotary driving source is 15000r/min, the main rods are arranged at intervals in a triangular matrix, the spacing distance is 15mm, the length of the long main rod is 300mm, the length of the short main rod is 200mm, the needle ribs are arranged at intervals in a triangular matrix on the long main rod, the spacing distance is 7mm, the length of the needle ribs is gradually reduced from 15mm to 10mm from the inner side to the outer side of the long main rod, the needle ribs are arranged at intervals in a triangular matrix on the short main rod, the spacing distance is 5mm, and the lengths of the needle ribs are equal to; in the third reaction chamber, the rotating speed of the rotating drive source is 2500r/min, the main rods are arranged at intervals in a triangular matrix mode, the interval distance is 15mm, the length of the long main rod is 250mm, the length of the short main rod is 150mm, the needle ribs are arranged at intervals in a triangular matrix mode on the long main rod, the interval distance is 7mm, and the length of the needle ribs is 15m from the inner side to the outer side of the long main rodThe m is decreased progressively to 10mm, the needle ribs are arranged at intervals in a triangular matrix on the short main rod, the interval distance is 5mm, and the length of the needle ribs is equal to 8 mm. Under the condition, the desulfurization rate reaches 99 percent.
The invention has the advantages that: 1. the device is based on the supergravity reaction, the centrifugal acceleration generated by the rotating driving source driving the rotating mechanism can reach 20-500 times of the gravity acceleration, under the action of the centrifugal force field, the gas-liquid relative movement speed is increased, the interphase contact area is greatly increased and rapidly updated, the gas and the liquid are uniformly mixed on the microcosmic surface, the mass transfer rate in the reaction process can be increased by 1-2 orders of magnitude, the processing time is reduced, and the volume of the equipment can be reduced; 2. by the treatment of the device, the processes of dust removal, desulfurization and white elimination of the ship tail gas are more thorough, the tail gas emission is cleaner, and the purification efficiency can reach 99%; 3. the distribution rod structure on the rotating mechanism strengthens gas-liquid mixing and reaction, particularly strengthens gas-liquid mixing and reaction near the hollow rotating shaft, obtains removal efficiency at least 3-5% higher than that of an impeller type rotating device, has lower cost than the impeller type rotating device, is more convenient to process and maintain, obtains removal efficiency at least 5-10% higher than that of a silk screen and a filler type rotating device, and solves the problems of instability, easy scattering and the like of the silk screen and the filler type rotating device in a supergravity environment; the rotary mechanism with the distribution rod type avoids the problem of being blocked by tail gas dust and calcium and magnesium precipitates generated in the desulfurization process; 4. the invention adopts a three-section type integrated device, has small volume and stronger stability, is not influenced by the swinging and the oscillation of the ship, greatly saves the occupied area of equipment, reduces the energy consumption and is beneficial to the reasonable utilization of the space of the ship; 5. the device of the invention adopts seawater as a reaction raw material, has rich sources, reduces the operation cost and reduces the procedures and cost of post-treatment.
Claims (10)
1. The utility model provides a syllogic hypergravity boats and ships tail gas processing apparatus which characterized in that: comprises a first reaction chamber, a second reaction chamber, a third reaction chamber, a rotating mechanism and a rotating driving source; each reaction chamber is internally provided with a rotating mechanism, one end of a hollow rotating shaft of the rotating mechanism is arranged on the wall surface of the reaction chamber in a penetrating way and is connected with an external rotating driving source, the other end of the hollow rotating shaft is butted with a sealing device fixed on the wall surface of the reaction chamber, the hollow rotating shaft is positioned at the part in the reaction chamber, the wall surface of the hollow rotating shaft is provided with a spraying hole, and the outer wall surface of the hollow rotating shaft is provided with; all insert intake pipe to hollow rotating shaft in on the sealing device of each reaction chamber, first reaction chamber, insert inlet tube to hollow rotating shaft in on the sealing device of second reaction chamber, the sea water even goes into the inlet tube, the intake pipe, the inlet tube is located the part of hollow rotating shaft, it has the gas pocket to correspond to set up on its wall, the water hole, the gas outlet has all been seted up on the upper portion wall of each reaction chamber, waste liquid outlet has all been seted up on the lower wall, boats and ships tail gas even goes into the intake pipe of first reaction chamber, the gas outlet of first reaction chamber and the air inlet intercommunication of second reaction chamber, the gas outlet of second reaction chamber and the air inlet intercommunication of third reaction chamber.
2. The three-stage hypergravity ship tail gas treatment device of claim 1, characterized in that: a rotary driving source connected with the rotary mechanism in the first reaction chamber, wherein the rotating speed of the rotary driving source is 500-2000 r/min; a rotation driving source connected with the rotation mechanism in the second reaction chamber, wherein the rotation speed of the rotation driving source is 800-20000 r/min; and the rotating driving source is connected with the rotating mechanism in the third reaction chamber, and the rotating speed of the rotating driving source is 500-3000 r/min.
3. The three-stage hypergravity ship tail gas treatment device of claim 1, characterized in that: in the first reaction chamber, the spraying density of the hollow rotating shaft is 0.1-0.3, and the gas-liquid flow ratio is 200-1000; in the second reaction chamber, the spraying density of the hollow rotating shaft is 0.3-0.6, and the gas-liquid flow ratio is 100-200.
4. The three-stage hypergravity ship tail gas treatment device of claim 1, characterized in that: the distribution rod comprises a main rod fixed on the outer wall surface of the hollow rotating shaft and a needle rib fixed on the main rod.
5. The three-stage hypergravity ship tail gas treatment device of claim 4, characterized in that: the main rods are fixed perpendicular to the outer wall surface of the hollow rotating shaft, and are arranged on the outer wall surface of the hollow rotating shaft at intervals in a matrix manner and alternately arranged by long rods and short rods; the needle ribs are fixed perpendicular to the outer wall surface of the main rod, the needle ribs are arranged on the outer wall surface of the main rod at intervals in a matrix mode, and the length of the needle ribs is increased or decreased progressively or is arranged at equal length along the length direction of the main rod.
6. The three-stage hypergravity ship tail gas treatment device of claim 5, characterized in that: the distance between the main rods and the outer wall surface of the hollow rotating shaft is 10-500 mm, the distance between the needle ribs and the outer wall surface of the long main rod is 5-250 mm, and the distance between the needle ribs and the outer wall surface of the short main rod is 3-150 mm; the distance between the main rods and the outer wall surface of the hollow rotating shaft is 5-200 mm, the distance between the needle ribs and the outer wall surface of the long main rod is 3-100 mm, and the distance between the needle ribs and the outer wall surface of the short main rod is 3-80 mm; the distance between the main rods arranged on the outer wall surface of the hollow rotating shaft is 5-230 mm, the distance between the needle ribs arranged on the outer wall surface of the long main rod is 5-200 mm, and the distance between the needle ribs arranged on the outer wall surface of the short main rod is 3-100 mm.
7. The three-stage hypergravity ship tail gas treatment device of claim 5, characterized in that: the main rod is arranged on the outer wall surface of the hollow rotating shaft at intervals in a triangular matrix or rectangular matrix mode, and the pin ribs are arranged on the outer wall surface of the main rod at intervals in a triangular matrix or rectangular matrix mode.
8. The three-stage hypergravity ship tail gas treatment device of claim 1, characterized in that: the hollow rotating shaft of the rotating mechanism is arranged transversely or vertically.
9. The three-stage hypergravity ship tail gas treatment device of claim 1, characterized in that: in each reaction chamber, a connecting rod is arranged between the distribution rods for fixing and supporting.
10. The working method of the three-stage type hypergravity ship tail gas treatment device according to claim 1 is characterized by comprising the following steps:
s100: in the first reaction chamber, seawater enters the hollow rotating shaft from the water inlet pipe through the water hole, ship tail gas enters the hollow rotating shaft from the air inlet pipe through the air hole, is mixed in the hollow rotating shaft, then enters the reaction chamber from the hollow rotating shaft through the spraying hole, rotates along with the rotating mechanism, and is acted by the distribution rod under the super-gravity environment, impurities in the ship tail gas are discharged from the waste liquid outlet along with the seawater, and the primary clean waste gas enters the second reaction chamber from the air outlet;
s200: in the second reaction chamber, seawater enters the hollow rotating shaft from the water inlet pipe through the water hole, primary clean waste gas enters the hollow rotating shaft from the air inlet pipe through the air hole, is mixed in the hollow rotating shaft, then enters the reaction chamber from the hollow rotating shaft through the spraying hole, rotates along with the rotating mechanism, and is acted by the distribution rod under the super-gravity environment, sulfides in the primary clean waste gas are adsorbed by the seawater and then are discharged from the waste liquid outlet, and the secondary clean waste gas enters the third reaction chamber from the air outlet;
s300: in the third reaction chamber, the clean waste gas of follow gets into hollow pivot through the gas pocket from the intake pipe, again from hollow pivot through spraying the hole and get into in the reaction chamber, the steam that carries in the clean waste gas of follow, along with rotary mechanism is rotatory, through the effect of distribution rod under the hypergravity environment, is got rid of on the reaction chamber wall, then discharges from the waste liquid export under the action of gravity, and tail gas purification is discharged from the gas outlet.
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