CN215610534U - High-efficient desulphurization unit of blast furnace slag flushing water - Google Patents
High-efficient desulphurization unit of blast furnace slag flushing water Download PDFInfo
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- CN215610534U CN215610534U CN202123152201.8U CN202123152201U CN215610534U CN 215610534 U CN215610534 U CN 215610534U CN 202123152201 U CN202123152201 U CN 202123152201U CN 215610534 U CN215610534 U CN 215610534U
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Abstract
The utility model relates to the technical field of desulfurization devices, and provides a high-efficiency desulfurization device for blast furnace slag washing water, which comprises a tower body, an inlet flue arranged on the side wall of the tower body, and a spraying mechanism arranged in the tower body and positioned above the inlet flue, and is characterized in that: the desulfurization device also comprises a desulfurization slurry pool for placing blast furnace slag washing water, a circulating pump with an inlet end communicated with the desulfurization slurry pool and an outlet end communicated with the spraying mechanism, and a filtering mechanism with an inlet end connected with a water outlet of the tower body and an outlet end connected with a water return port of the desulfurization slurry pool. The problems that a large amount of new water is required to be consumed, the water resource consumption is high and the cost is high in the desulfurization process of the conventional desulfurization device in the related art are solved.
Description
Technical Field
The utility model relates to the technical field of desulfurization devices, in particular to a high-efficiency desulfurization device for blast furnace slag flushing water.
Background
SO2Is a suffocating odor gas which is harmful to human beings and other living things, can permeate into buildings and metal surfaces to corrode buildings and metal equipment, and can be oxidized into SO in the air3When floating dust exists or the humidity is high, sulfuric acid mist which is a secondary pollutant with higher harm can be formed. SO (SO)2The main generation sources of (1) are coal and metal smelting.
In order to protect the environment, each country has strict restriction standards for the emission of sulfur dioxide, and nearly 200 desulfurization processes including before combustion, during combustion and after combustion are developed. The desulfurization equipment is also various, but the desulfurization process of the existing desulfurization device needs to consume a large amount of new water, so that the water resource consumption is high and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-efficiency desulfurization device for blast furnace slag flushing water, which solves the problems that a large amount of new water is required to be consumed, the water resource consumption is high and the cost is high in the desulfurization process of the conventional desulfurization device in the related art.
The technical scheme of the utility model is as follows: the utility model provides a high-efficient desulphurization unit of blast furnace slag washing water, includes the tower body, sets up the entry flue on the tower body lateral wall and set up in the tower body and be located the mechanism that sprays of entry flue top, the key lies in: the desulfurization device also comprises a desulfurization slurry pool for placing blast furnace slag washing water, a circulating pump with an inlet end communicated with the desulfurization slurry pool and an outlet end communicated with the spraying mechanism, and a filtering mechanism with an inlet end connected with a water outlet of the tower body and an outlet end connected with a water return port of the desulfurization slurry pool.
Desulphurization unit is still including setting up in the tower body and being located the turbulator device that sprays between mechanism and the entry flue, turbulator device includes the locating plate, set up a set of torrent hole on the locating plate, and set up the torrent unit in the torrent hole, the torrent unit includes the interior barrel with the coaxial setting in torrent hole, and fix a set of whirl blade between the pore wall in barrel outer wall and torrent hole, the circumferencial direction align to grid of barrel just all slopes to set up in all whirl blades edge, leave flue gas passageway between the adjacent whirl blade.
The cyclone blades are of a rectangular structure, and the included angle between each cyclone blade and the lower end face of the positioning plate is 30-45 degrees.
The porosity of the turbulation holes on the locating plate is 40-60%.
The diameter of the positioning plate is D1, the diameter of the turbulence hole is D2, and the ratio of D1 to D2 is 13: (1.0-1.4).
The outer diameter of the inner cylinder body is D3, the ratio of D2 to D3 is 18: (3-5).
The top of barrel all is fixed with first heat-conducting plate in every, and the turbulator device still includes the second heat-conducting plate that is used for giving the heat transfer for the outside heat energy conversion equipment of tower body, and all first heat-conducting plates all are connected with the second heat-conducting plate.
The desulfurization device also comprises a first speed sensor and a second speed sensor which are arranged in the tower body and used for detecting the flue gas speed, wherein the first speed sensor and the second speed sensor are arranged along the up-down direction and are both positioned above the turbulator device.
The desulfurizing device is characterized by further comprising a demisting layer which is arranged in the tower body and positioned above the spraying mechanism, and the flue gas outlet of the tower body is positioned above the demisting layer.
The spraying mechanism comprises at least two spraying branch pipes which are arranged along the vertical direction, one end of each spraying branch pipe is a closed end, the other end of each spraying branch pipe is connected with a main spraying pipe fixed on the side wall of the tower body, the inlet end of the main spraying pipe extends to the outside of the tower body and is connected with a circulating pump by virtue of a connecting pipe, and each spraying branch pipe is connected with a group of spray heads which are arranged along the length direction.
The working principle and the beneficial effects of the utility model are as follows: deposit the blast furnace slag washing water in the desulfurization slurry pond, utilize the circulating pump to carry the desulfurization slurry in the desulfurization slurry pond in the tower body and spout via spraying mechanism, the flue gas contacts with desulfurization slurry liquid drop disturbance in the tower body, accomplish the desulfurization process through chemical reaction, the solution after the desulfurization filters the back through filter mechanism, return to the interior used circulation of desulfurization slurry pond for blast furnace slag washing water has obtained make full use of, greatly reduced water resource consumption, can practice thrift the cost.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is an enlarged view of a in fig. 2.
Fig. 4 is a top view of the first heat-conducting plate of the present invention.
Fig. 5 is a front view of the first heat-conducting plate of the present invention.
In the figure: 1. the device comprises a positioning plate, 2, turbulence holes, 3, a turbulence unit, 3-1, an inner cylinder, 3-2, swirl blades, 4, a first heat conducting plate, 5, a tower body, 6, an inlet flue, 7, a spraying mechanism, 7-1, a spraying branch pipe, 7-2, a spray head, 8, a demisting layer, 9, a flue gas outlet, 10, a desulfurization slurry pool, 11, a circulating pump, 12, a filtering mechanism, 13, a connecting pipe, 14, a first speed sensor, 15 and a second speed sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall be included within the scope of protection of the present invention.
The specific embodiment, as shown in fig. 1, a high-efficient desulphurization unit of blast furnace slag washing water, includes tower body 5, the entry flue 6 of setting on the tower body 5 lateral wall, and set up in tower body 5 and be located the spray mechanism 7 of entry flue 6 top, desulphurization unit still includes the desulfurization slurry pond 10 that is used for placing blast furnace slag washing water, entrance point and desulfurization slurry pond 10 intercommunication and exit end and spray circulating pump 11 that mechanism 7 communicates and entrance point and tower body 5's outlet connection and exit end and the filter mechanism 12 that the return water mouth of desulfurization slurry pond 10 is connected.
As a further improvement of the utility model, the desulfurization device also comprises a turbulator device which is arranged in the tower body 5 and is positioned between the spraying mechanism 7 and the inlet flue 6, the turbulator device comprises a positioning plate 1, a group of turbulating holes 2 which are arranged on the positioning plate 1, and a turbulent flow unit 3 which is arranged in the turbulent flow holes 2, the turbulent flow unit 3 comprises an inner cylinder 3-1 which is coaxial with the turbulating holes 2, and a group of rotational flow blades 3-2 which are fixed between the outer wall of the inner cylinder 3-1 and the hole wall of the turbulent flow holes 2, all the rotational flow blades 3-2 are uniformly arranged along the circumferential direction of the inner cylinder 3-1 and are obliquely arranged, and a flue gas channel is reserved between the adjacent rotational flow blades 3-2.
As shown in fig. 1, when the turbulator device is not installed, flue gas enters the tower body 5 from the inlet flue 6 on the right side, after spraying, the flue gas rushes to the wall due to the blocking of the inlet flue 6 to the tower wall, most flue gas flows upwards along the tower wall in a concentrated manner at the tower wall, meanwhile, a large clockwise vortex is formed at the left side in the tower body 5, a high-speed flue is formed, the uniform speed can reach 13m/s, the right-side gas speed is low and is 1-2m/s, small counterclockwise vortices with a large gas speed are formed at the position, close to the liquid level, of the lower right corner of the tower body 5 and the inlet flue 6, so that the flue gas close to the liquid level is easy to carry water, the humidity of the flue gas is increased, and the flue gas flows back to the inlet flue 6 to corrode the flue. After the turbulator device is installed, the uniformity of a flow field in the tower body 5 is obviously improved, the rectifying effect of the turbulator device is obvious, and particularly, the high-speed flue and the flue gas wall flushing phenomenon at one end far away from the inlet flue 6 disappear, so that the inlet flue can be effectively prevented from being corroded.
As shown in figure 1, the flue gas is drawn forth by the draught fan and is passed through entry flue 6 and get into in the tower body 5, can take place strong plane centripetal rotation when the static whirl blade 3-2 of turbulator device is flowed through to the flue gas, rotatory flue gas strikes the desulfurization thick liquid into rotatory foam district, then hold in the palm the foam district, make whole rotatory foam district be in the suspended state, the flue gas passes the foam district from bottom to top and carries out the abundant reaction with rotatory descending desulfurization thick liquid, the reaction efficiency is higher, almost there is not desulfurization reaction blind area, can improve desulfurization effect.
The collecting cyclone blades 3-2 are rectangular structures, and the included angle between the cyclone blades 3-2 and the lower end surface of the positioning plate 1 is 30-45 degrees and is preferably 40 degrees.
As a further improvement of the utility model, the porosity of the turbulence holes 2 in the locating plate 1 is 40-60%. The flue gas flow line above the turbulator device becomes smoother, the anticlockwise vortex below the turbulator device becomes larger, and increases along with the increase of the porosity of the turbulator device, because the incoming flue gas is easy to generate downward speed after impacting the tower wall and the turbulator device, part of the flue gas retained below the turbulator device forms anticlockwise vortex under the influence of high-speed flue gas in the inlet flue 6, when the diameter of the turbulence unit 3 is fixed, the porosity of the turbulator device is increased, the through-flow sectional area of the flue gas is increased, the high-speed flue gas entering the tower flows upwards more, the impact influence on the retained flue gas below the turbulator device is weakened, the anticlockwise vortex area formed by the retained flue gas is increased, the anticlockwise vortex causes water carrying of the flue gas, the corrosion of the inlet flue 6 can be caused, the integral desulfurization efficiency of the desulfurization tower is influenced, so the turbulator device with proper porosity is installed, has important influence and function on improving the uniformity distribution of the flow field in the tower and controlling the water carried by the flue gas. When the porosity is 50%, the effect between the flue gas and the slurry is more favorable, and the desulfurization efficiency is improved.
As a further improvement of the present invention, as shown in fig. 2, the diameter of the positioning plate 1 is D1, the diameter of the turbulence hole 2 is D2, and the ratio of D1 to D2 is 13: (1.0-1.4). When the diameter of the turbulence unit 3 is reduced when the porosity is constant, the anticlockwise vortices below the turbulator device become larger and tend to move towards the inlet flue 6, which also causes corrosion of the inlet flue 6, which is extremely disadvantageous for in-tower desulfurization. When the porosity is constant (e.g. 50%), the flow field over the turbulator device becomes more uniform and smooth as the diameter of the turbulence unit decreases, since when the porosity is constant, the number of openings tends to increase as the diameter of the turbulence unit 3 decreases, and the rectifying effect of the turbulator device increases. When the ratio of D1 to D2 is 13: 1.0, or 13: 1.2 the flow field in the tower body 5 is more uniform and stable, which is beneficial to improving the mass transfer efficiency between the slurry and the flue gas in the tower and the utilization rate of the slurry, reducing the operation load of the circulating pump 11, further reducing the operation cost and improving the benefit.
As shown in fig. 2 and 3, the inner cylinder 3-1 has an outer diameter D3, and a ratio of D2 to D3 of 18: (3-5) and preferably 9: 2, the swirl vanes 3-2 have large enough area to contact with the flue gas, and the desulfurization effect is better.
As a further improvement of the present invention, a first heat conducting plate 4 is fixed on the top of each inner cylinder 3-1, the turbulator device further comprises a second heat conducting plate of a heat energy conversion device for transferring heat to the outside of the tower body, and all the first heat conducting plates 4 are connected with the second heat conducting plate. As shown in fig. 4 and 5, the heat in the tower body 5 is collected and transferred to the external heat energy conversion device by the cooperation of the first heat conduction plate 4 and the second heat conduction plate, so that the heat can be recycled, the waste of heat energy can be reduced, and the cost is saved.
As a further improvement of the present invention, the desulfurization apparatus further comprises a first velocity sensor 14 and a second velocity sensor 15 disposed in the tower body 5 for detecting the velocity of the flue gas, the first velocity sensor 14 and the second velocity sensor 15 being arranged in the up-down direction and both being located above the turbulator means. As shown in fig. 1, the first velocity sensor 14 and the second velocity sensor 15 can be used to measure the flue gas velocity at different positions above the turbulator devices in the tower 5, which facilitates statistical data recording.
As a further improvement of the utility model, the desulfurization device further comprises a demisting layer 8 which is arranged in the tower body 5 and is positioned above the spraying mechanism 7, and a flue gas outlet 9 of the tower body 5 is positioned above the demisting layer 8. As shown in figure 1, the desulfurized flue gas passes through the demisting layer 8 and then is discharged from the flue gas outlet 9, so that white smoke can be reduced, and the pollution to the environment can be reduced.
As a further improvement of the utility model, the spraying mechanism 7 comprises at least two spraying branch pipes 7-1 which are arranged along the vertical direction, one end of each spraying branch pipe 7-1 is a closed end, the other end of each spraying branch pipe is connected with a spraying main pipe fixed on the side wall of the tower body 5, the inlet end of each spraying main pipe extends to the outside of the tower body 5 and is connected with the circulating pump 11 by a connecting pipe 13, and each spraying branch pipe 7-1 is connected with a group of spray heads 7-2 which are arranged along the longitudinal direction.
As shown in figure 1, the circulating pump 11 conveys the desulfurization slurry in the desulfurization slurry pool 10 into the connecting pipe 13, then the desulfurization slurry is distributed into each spraying branch pipe 7-1 through the spraying main pipe and is sprayed out through the spray head 7-2, and the spraying effect can be improved through the arrangement of the plurality of spraying branch pipes 7-1 and the spray head 7-2. The arrangement of the spraying header pipe can reduce the number of open holes on the tower body 5, and the sealing effect is improved. The connection part of each spraying branch pipe 7-1 and the spraying main pipe is provided with a control valve, and the on-off state of the spraying branch pipe 7-1 can be changed according to actual needs.
As a further improvement of the utility model, the spray branch pipe 7-1 and the spray main pipe, and the spray branch pipe 7-1 and the tower body 5 are detachably connected. As shown in figure 1, when a certain spraying branch pipe 7-1 has a problem, the spraying branch pipe 7-1 can be directly disassembled, and the influence on other spraying branch pipes 7-1 can not be generated.
When the utility model is used specifically, the diameter of the positioning plate 1 is 13m, the diameter of the turbulent flow hole 2 is 1.4m, 1.2m or 1.0m, and the porosity of the turbulent flow hole 2 on the positioning plate 1 is 40%, 50% or 60%. As the swirl blades 3-2 with a certain swirl angle are arranged in the turbulence hole 2, flue gas flowing from the inlet of the desulfurization tower is guided and shunted by the swirl blades 3-2 in the turbulence hole 2, and spirally-rising air flow is formed at the absorption section above the turbulence hole 2, and an anticlockwise vortex is formed above each turbulence unit 3, on one hand, the vertical upward velocity component of the spirally-rising flue gas is reduced, so that the total stroke of the flue gas is increased, the residence time of the flue gas and slurry liquid drops in the tower is prolonged, and the residence time of the slurry liquid in the tower is averagely prolonged to be more than 3 s; meanwhile, the collision probability between the slurry and the flue gas is increased, so that the utilization rate of the slurry is improved; on the other hand, because spiral rising's flue gas increases the thick liquid reverse action to and the through-flow cross-sectional area suddenly drops when the flue gas flows through torrefaction hole 2, and the change of 3-2 clearance in the inside whirl blade of torrefaction hole 2 is bigger in addition, cause the clearance with spray the thick liquid and to the interior flue gas flow's of tower influence reinforcing, the flue gas that is close to tower wall border can form anticlockwise whirl, increase the mixing of inside flue gas and desulfurizing tower wall department flue gas, effectively avoided tower wall department to form the flue gas short circuit phenomenon, and then the going on of increaseing high-efficient desulfurization.
The blast furnace slag washing water is stored in the desulfurization slurry tank 10, in order to ensure the desulfurization effect, a desulfurizer can be added into the desulfurization slurry tank 10, a mixer is additionally arranged between a connecting pipe 13 and a circulating pump 11, the desulfurizer and the slurry are mixed by the mixer, then the mixture is sent into a spraying branch pipe 7-1 through the connecting pipe 13, and the mixture is sprayed out by a spray head 7-2. The flue gas enters the tower body 5 through the inlet flue 6, is in disturbance contact with the desulfurization slurry liquid drops in the tower body 5, and removes SO in the flue gas through chemical reaction2、SO3And HCl, HF and other acidic gases to complete the desulfurization process, and the desulfurized solution is filtered by the filtering mechanism 12 and then returned to the desulfurization slurry tank 10 for recycling, so that blast furnace slag flushing water and cooling tower sewage wastewater are fully utilized, the water resource consumption is greatly reduced, and the cost can be saved. The emission concentration of sulfur dioxide can be controlled to be 5mg/Nm3Hereinafter, the pH value of the desulfurization waste water is between 5 and 6.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a high-efficient desulphurization unit of blast furnace slag washing water, includes tower body (5), sets up inlet flue (6) on tower body (5) lateral wall and set up in tower body (5) and be located spraying mechanism (7) of inlet flue (6) top, its characterized in that: the desulfurization device also comprises a desulfurization slurry pool (10) for placing blast furnace slag washing water, a circulating pump (11) with an inlet end communicated with the desulfurization slurry pool (10) and an outlet end communicated with the spraying mechanism (7), and a filtering mechanism (12) with an inlet end connected with a water outlet of the tower body (5) and an outlet end connected with a water return port of the desulfurization slurry pool (10);
the desulfurization device further comprises a turbulator device which is arranged in the tower body (5) and located between the spraying mechanism (7) and the inlet flue (6), wherein the turbulator device comprises a positioning plate (1), a group of turbulating holes (2) formed in the positioning plate (1) and a turbulating unit (3) arranged in the turbulating holes (2), the turbulating unit (3) comprises an inner cylinder body (3-1) coaxially arranged with the turbulating holes (2) and a group of swirl blades (3-2) fixed between the outer wall of the inner cylinder body (3-1) and the hole wall of the turbulating holes (2), all the swirl blades (3-2) are uniformly arranged in the circumferential direction of the inner cylinder body (3-1) and are all obliquely arranged, and a flue gas channel is reserved between the adjacent swirl blades (3-2);
the top of each inner cylinder (3-1) is fixed with a first heat-conducting plate (4), the turbulator device further comprises a second heat-conducting plate used for transferring heat to a heat energy conversion device outside the tower body, and all the first heat-conducting plates (4) are connected with the second heat-conducting plate.
2. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the cyclone blades (3-2) are of a rectangular structure, and the included angle between the cyclone blades (3-2) and the lower end face of the positioning plate (1) is 30-45 degrees.
3. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the porosity of the turbulent flow holes (2) on the positioning plate (1) is 40-60%.
4. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the diameter of the positioning plate (1) is D1, the diameter of the turbulence hole (2) is D2, and the ratio of D1 to D2 is 13: (1.0-1.4).
5. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the outer diameter of the inner cylinder (3-1) is D3, and the ratio of D2 to D3 is 18: (3-5).
6. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the desulfurization device also comprises a first speed sensor (14) and a second speed sensor (15) which are arranged in the tower body (5) and used for detecting the speed of the flue gas, wherein the first speed sensor (14) and the second speed sensor (15) are arranged along the up-down direction and are both positioned above the turbulator device.
7. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the desulfurization device further comprises a demisting layer (8) which is arranged in the tower body (5) and positioned above the spraying mechanism (7), and a flue gas outlet (9) of the tower body (5) is positioned above the demisting layer (8).
8. The high-efficiency desulfurization device for blast furnace slag washing water according to claim 1, characterized in that: the spraying mechanism (7) comprises at least two spraying branch pipes (7-1) which are arranged along the vertical direction, one end of each spraying branch pipe (7-1) is a closed end, the other end of each spraying branch pipe is connected with a main spraying pipe fixed on the side wall of the tower body (5), the inlet end of the main spraying pipe extends to the outside of the tower body (5) and is connected with a circulating pump (11) by virtue of a connecting pipe (13), and each spraying branch pipe (7-1) is connected with a group of spray heads (7-2) which are arranged along the length direction.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832587A (en) * | 2022-06-09 | 2022-08-02 | 山东泰开环保科技有限公司 | Slag flushing water desulfurization system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832587A (en) * | 2022-06-09 | 2022-08-02 | 山东泰开环保科技有限公司 | Slag flushing water desulfurization system |
| CN114832587B (en) * | 2022-06-09 | 2022-11-25 | 山东泰开环保科技有限公司 | Slag flushing water desulfurization system |
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