CN211496990U - Novel high-efficient liquid drop prevention hits wall desulfurization waste water flue evaporation device - Google Patents
Novel high-efficient liquid drop prevention hits wall desulfurization waste water flue evaporation device Download PDFInfo
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- CN211496990U CN211496990U CN201922223057.9U CN201922223057U CN211496990U CN 211496990 U CN211496990 U CN 211496990U CN 201922223057 U CN201922223057 U CN 201922223057U CN 211496990 U CN211496990 U CN 211496990U
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Abstract
The utility model discloses a novel high-efficient prevent that liquid droplet bumps wall desulfurization waste water flue evaporation plant belongs to electric power environmental protection trade sewage treatment technical field, installs in the vertical cigarette position in electrostatic precipitator upper reaches, novel desulfurization waste water flue evaporation plant by: the device comprises an inlet square round joint, a cylindrical evaporator shell, a flue gas cyclone, a desulfurization waste water atomization spray gun and an outlet square round joint, and the device increases the residence time of desulfurization waste water liquid drops in the air by controlling the flow track of flue gas, so that the desulfurization waste water liquid drops are fully contacted with the flue gas, the convection heat transfer time between liquid drop groups and the flue gas is increased, the evaporation efficiency of the system is effectively increased, and the collision between the desulfurization waste water liquid drops and the wall surface of a flue is reduced.
Description
Technical Field
The utility model relates to an electric power environmental protection trade sewage treatment technical field, concretely relates to install novel high-efficient liquid drop of preventing who installs in the vertical flue position department in electrostatic precipitator upper reaches and bump wall desulfurization waste water flue evaporation plant.
Background
The limestone-gypsum wet flue gas desulfurization process has the advantages of high desulfurization efficiency, rich desulfurizer resources, wide load range and the like, is most widely applied to coal-fired power plants in China and accounts for more than 90 percent of the total industrial desulfurization amount in China. But the desulfurization waste water produced by the method has the characteristics of high suspended matter, high salt content, various heavy metals and the like, is the waste water which is the most difficult to treat at the tail end of a power plant system, still has high salt content and high corrosivity even if treated by the traditional technology, and is unfavorable for the environment no matter directly discharged or merged into a municipal sewage plant.
Flue evaporation of desulfurization wastewater is used as an effective desulfurization wastewater zero-emission technology, and mainly a gas-liquid two-phase flow nozzle is used for atomizing desulfurization wastewater and spraying the desulfurization wastewater into a flue between an air preheater and a dust remover, and the wastewater is completely evaporated by using flue gas waste heat, so that pollutants in the wastewater are converted into crystals or salts which are captured by the dust remover along with fly ash. Theoretical research shows that flue evaporation of the desulfurization wastewater does not have negative influence on a dust remover, the PM2.5 concentration at the outlet of the dust remover is not greatly influenced, flue temperature is reduced by flue evaporation of the desulfurization wastewater, and water consumption of a desulfurization system is reduced.
However, the flue evaporation technology is limited by the factors of insufficient heat of flue gas, ash content of flue gas, undersize of a modified flue structure and the like, if waste water cannot be completely evaporated in a set time and space, the humidity of the flue gas is increased, and the waste water droplets which are not completely evaporated collide with the wall surface of the flue under the driving of the flue gas to cause the problems of flue scaling, ash deposition, corrosion, blockage of a dust remover and the like, so that the large-scale popularization and application of the flue evaporation technology are greatly limited.
Therefore, provide a strong in reliability, simple structure's novel high-efficient liquid drop of preventing and bump wall desulfurization waste water flue evaporation plant, improve the overall evaporation efficiency of system, reduce the collision of desulfurization waste water liquid drop and flue wall to solve the dust remover caking that pipeline corruption, flue gas humidity increase caused and flue gas discharge temperature and hang down the scheduling problem excessively, just become the technical problem that the skilled person in the art needs to solve urgently.
Disclosure of Invention
An object of the utility model is to provide a novel high-efficient prevent that liquid drop bumps wall desulfurization waste water flue evaporation plant, its simple structure is reasonable reliable, the device increases the dwell time of desulfurization waste water liquid drop in the air through control flue gas flow orbit, makes desulfurization waste water liquid drop and flue gas fully contact, has increased the convection heat transfer time between liquid drop crowd and the flue gas, can effectively transfer the whole evaporation efficiency who improves flue evaporation plant, reduces the collision of desulfurization waste water liquid drop and flue wall.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a novel high-efficient prevent that liquid droplet bumps wall desulfurization waste water flue evaporation plant installs in the vertical cigarette position in electrostatic precipitator upper reaches, novel high-efficient prevent that liquid droplet bumps wall desulfurization waste water flue evaporation plant comprises entry square circle festival, cylindrical evaporator casing, flue gas swirler, desulfurization waste water atomizing spray gun and export square circle festival, entry square circle festival and export square circle festival regard as flue evaporation plant's cylindrical casing and rectangular flue's connection structure, flue gas swirler places at cylindrical evaporator casing entry end, desulfurization waste water atomizing spray gun places in the flue gas swirler low reaches region in cylindrical evaporator casing.
The size of the inner diameter D of the cylindrical evaporator shell is equal to the side length of the longest edge of the cross section of the flue connected with the evaporator, and the size of the height of the cylindrical evaporator shell is greater than or equal to 6D.
The inlet square round joint and the outlet square round joint are completely symmetrical and identical in structure and size, and the overall height of the inlet square round joint and the overall height of the outlet square round joint are greater than or equal to D.
Flue gas swirler prevents as novel high efficiency that the liquid droplet bumps wall desulfurization waste water flue evaporation plant's core component and cylindrical evaporator shell center pin are coaxial to be arranged, flue gas swirler by center to shell in proper order by: the vortex flow guide ring comprises a central guide ring, vortex blades and a cyclone shell, wherein the central guide ring is fixedly connected with the cyclone shell through the vortex blades, the number of the vortex blades is 18, the 18 vortex blades are uniformly distributed at intervals of 20 degrees around a central guide ring center shaft along a clockwise direction at a certain vortex angle, the vortex angle formed by the vortex blades and the vertical axis direction of the central guide ring is 22 degrees, the diameter of the central guide ring is equal to D/10, the height of the central guide ring is D/4, the structure of the cyclone shell comprises a gas gathering ring and a cyclone guide ring, the height of the gas gathering ring is D/3, the diameter of the gas gathering ring is 4D/5, the height of the cyclone guide ring is D/3, and the diameter of the cyclone guide ring is 7D 10.
The desulfurization waste water atomization spray gun is arranged at the downstream 0.5m position of the flue gas cyclone, and the atomization spray gun has the same atomization liquid spraying direction as the flue gas flowing direction.
Compared with the prior art, the utility model has the advantages of as follows:
1. the structure is simple and reliable, and the generated system resistance is small;
2. the residence time of the desulfurization wastewater liquid drops in the air is prolonged, the convection heat transfer time between the liquid drop groups and the flue gas is increased, and the overall evaporation efficiency of the flue evaporation device is greatly improved;
3. the flow path of the flue gas is controlled through the flue gas cyclone, so that the flue gas forms protective gas on the inner wall surface of the shell of the cylindrical evaporator, the collision between unevaporated desulfurization waste water liquid and the wall surface is prevented, and the phenomena of scaling, dust deposition, corrosion and the like of a flue are effectively prevented.
Description of the drawings:
FIG. 1 is a schematic view of a novel high-efficiency liquid drop-proof wall-collision desulfurization waste water flue evaporation device of the utility model;
fig. 2 is a schematic structural view of a flue gas cyclone according to the present invention;
in the figure: 1. the novel efficient desulfurization waste water flue evaporation device capable of preventing liquid drops from colliding with the wall comprises a device 2, an inlet square round joint, a 3, a cylindrical evaporator shell, a 4, a flue gas cyclone, a 5, a desulfurization waste water atomization spray gun, a 6, an outlet square round joint, a 7, a central guide ring, 8, cyclone blades, 9, a cyclone shell, 10, a gas gathering ring and 11, a cyclone guide ring.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples:
the positional relationships described in the present invention, such as "upper", "lower", "left", "right", "center", "horizontal", "top", are positional relationships based on the orientation shown in the drawings, and are merely for convenience of description and to simplify the description, not the specific orientation that the indicating device or apparatus must have, and therefore should not be construed as limiting the present invention.
An object of the utility model is to provide a novel high-efficient prevent that liquid drop bumps wall desulfurization waste water flue evaporation plant, its simple structure is reasonable reliable, and the device increases the dwell time of desulfurization waste water liquid drop in the air through control flue gas flow orbit, makes desulfurization waste water liquid drop and flue gas fully contact, has increased the convection heat transfer time between liquid drop crowd and the flue gas, can effectively transfer the whole evaporation efficiency who improves flue evaporation plant, reduces the collision of desulfurization waste water liquid drop and flue wall.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
as shown in fig. 1: a novel desulfurization waste water flue evaporation plant 1 installs in the vertical cigarette position in electrostatic precipitator upper reaches, novel desulfurization waste water flue evaporation plant comprises entry square circle festival 2, cylindrical evaporator casing 3, flue gas swirler 4, desulfurization waste water atomizing spray gun 5 and export square circle festival 6, entry square circle festival 2 and export square circle festival 6 are as the connection structure of flue evaporation plant cylindrical casing 6 with the rectangle flue, flue gas swirler 4 places the entry end at cylindrical evaporator casing 3, desulfurization waste water atomizing spray gun is placed in cylindrical evaporator casing 3 4 low reaches regions of flue gas swirler.
As shown in fig. 1: the size of the inner diameter D of the cylindrical evaporator shell 3 is equal to the longest side length of the cross section of a flue connected with the evaporator, and the size of the height of the cylindrical evaporator shell 3 is more than or equal to 6D.
As shown in fig. 1: the inlet square round joint 2 and the outlet square round joint 6 are completely symmetrical and the same in structure and size, and the overall height of the inlet square round joint 2 and the outlet square round joint 6 is larger than or equal to D.
As shown in fig. 2: flue gas swirler 4 is as novel high-efficient prevent that liquid droplet bumps wall desulfurization waste water flue evaporation plant 1's core component and cylindrical evaporator shell 3's center pin coaxial arrangement, flue gas swirler 4 by center to shell in proper order: the cyclone separator comprises a central guide ring 7, cyclone blades 8 and a cyclone casing 9, wherein the central guide ring 7 is fixedly connected with the cyclone casing 9 through the cyclone blades 8, the number of the cyclone blades 8 is 18, the 18 cyclone blades 8 are uniformly distributed at intervals of 20 degrees around the center shaft of the guide ring 7 in a clockwise direction at a certain cyclone angle, the cyclone angle formed by the cyclone blades 8 and the vertical axis direction of the central guide ring 7 is 22 degrees, the diameter of the central guide ring 7 is equal to D/10, the height of the central guide ring 7 is D/4, the cyclone casing 9 is composed of a gas gathering ring 10 and a cyclone guide ring 11, the height of the gas gathering ring 10 is D/3, the diameter of the gas gathering ring 10 is 7D/10, and the height of the cyclone guide ring 11 is D/3, the diameter of the swirler guide ring 11 is 4D/5.
As shown in fig. 1: the desulfurization waste water atomization spray gun 5 is arranged at the downstream 0.5m position of the flue gas cyclone, and the spraying direction of the atomized liquid of the desulfurization waste water atomization spray gun 5 is the same as the flowing direction of the flue gas.
In order to verify the new high-efficient application effect of preventing liquid drop from colliding wall desulfurization waste water flue evaporation plant, the utility model discloses a CFD technique is right respectively novel high-efficient direct waste water spray evaporation plant in preventing liquid drop from colliding wall desulfurization waste water flue evaporation plant and the current flue has carried out simulation contrast experiment, vertical flue is as simulation experiment physical geometry model before the supporting dust remover of bridge power plant 330MW unit is looked into to Beijing Boqi electric power technology limited company that two kinds of experimental schemes adopted, two kinds of experimental schemes all adopt the same model setting, the same boundary condition sets up and adopt the same spray gun parameter setting, and is right in the experimentation liquid drop evaporation quantity and liquid drop in two kinds of experimental schemes collide wall quantity and have monitored, and the simulation result of two kinds of experimental schemes sees table 1:
TABLE 1 statistical table of simulation results of two desulfurization waste water flue evaporation experimental schemes
| Experimental protocol | Diameter of atomized droplets | Monitoring total number of droplets | Number of escaping droplets | Number of wall catches | Number of evaporated droplets | Complete evaporation rate |
| High-efficient liquid drop prevention hits wall desulfurization waste water flue evaporation plant | 150μm | 100 | 0 | 8 | 92 | 92% |
| Direct waste water spray evaporation device in existing flue | 150μm | 100 | 0 | 18 | 82 | 82% |
As shown in table 1, the simulation results show: under the prerequisite that all adopts the same model setting, the same boundary condition setting and adopt the same spray gun parameter setting at two kinds of experimental schemes, the complete evaporation rate of novel high-efficient liquid drop of preventing that the liquid drop bumps wall desulfurization waste water flue evaporation plant's liquid drop is 92%, is higher than in current flue evaporation efficiency 82% of direct waste water spraying evaporation plant, and the liquid drop bumps the wall phenomenon and has obviously reduced, novel high-efficient liquid drop of preventing bumps wall desulfurization waste water flue evaporation plant has improved the holistic evaporation efficiency of system.
The utility model discloses a theory of operation lies in:
as shown in fig. 1: flue gas has changed the movement track of flue gas and has formed the whirl flue gas by the effect of flue gas swirler 4 behind the entry square and round section 2 entering cylindrical evaporator casing 3, the whirl flue gas has improved the dwell time of desulfurization waste water liquid drop in the air, the convection heat transfer time between liquid drop crowd and the flue gas has been increased, flue evaporation plant's whole evaporation efficiency is increased by a wide margin, meanwhile the whirl flue gas forms protective gas at cylindrical evaporator casing 3's internal face, prevent the collision of the desulfurization waste water liquid that does not evaporate and wall, can effectively prevent phenomenons such as flue scale deposit, deposition, corruption.
While the present invention has been described in detail with reference to the preferred embodiments, the present invention is not limited to the specific embodiments, but is to be construed as the best mode for carrying out the invention. All the simple modifications, equivalent changes and modifications made within the scope of the present invention should be still within the patent coverage of the present invention.
Claims (5)
1. The utility model provides a novel high-efficient prevent that liquid drop bumps wall desulfurization waste water flue evaporation device which characterized in that: novel high-efficient prevent that liquid droplet bumps wall desulfurization waste water flue evaporation plant comprises entry square circle festival, cylindrical evaporator casing, flue gas swirler, desulfurization waste water atomizing spray gun and export square circle festival, entry square circle festival and export square circle festival regard as the connection structure of cylindrical casing of flue evaporation plant and rectangular flue, flue gas swirler places at cylindrical evaporator casing entry end, desulfurization waste water atomizer spray gun places in cylindrical evaporator casing flue gas swirler low reaches region.
2. The novel high-efficiency liquid drop-prevention wall-collision desulfurization wastewater flue evaporation device is characterized in that: the size of the inner diameter D of the cylindrical evaporator shell is equal to the side length of the longest edge of the cross section of the flue connected with the evaporator, and the size of the height of the cylindrical evaporator shell is greater than or equal to 6D.
3. The novel high-efficiency liquid drop-prevention wall-collision desulfurization wastewater flue evaporation device is characterized in that: the inlet square round joint and the outlet square round joint are completely symmetrical and identical in structure and size, and the overall height of the inlet square round joint and the overall height of the outlet square round joint are greater than or equal to D.
4. The novel high-efficiency liquid drop-prevention wall-collision desulfurization wastewater flue evaporation device is characterized in that: the flue gas swirler is arranged coaxially with the central shaft of the cylindrical evaporator shell, and the flue gas swirler sequentially comprises from the center to the shell: the vortex flow guide ring comprises a central guide ring, vortex blades and a cyclone shell, wherein the central guide ring is fixedly connected with the cyclone shell through the vortex blades, the number of the vortex blades is 18, the 18 vortex blades are uniformly distributed at intervals of 20 degrees around a central guide ring center shaft along a clockwise direction at a certain vortex angle, the vortex angle formed by the vortex blades and the vertical axis direction of the central guide ring is 22 degrees, the diameter of the central guide ring is equal to D/10, the height of the central guide ring is D/4, the structure of the cyclone shell comprises a gas gathering ring and a cyclone guide ring, the height of the gas gathering ring is D/3, the diameter of the gas gathering ring is 4D/5, the height of the cyclone guide ring is D/3, and the diameter of the cyclone guide ring is 7D/10.
5. The novel high-efficiency liquid drop-prevention wall-collision desulfurization wastewater flue evaporation device is characterized in that: the desulfurization waste water atomization spray gun is arranged at the downstream 0.5m position of the flue gas cyclone, and the atomization spray gun has the same atomization liquid spraying direction as the flue gas flowing direction.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144642A (en) * | 2021-03-16 | 2021-07-23 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144642A (en) * | 2021-03-16 | 2021-07-23 | 北京工大环能科技有限公司 | Device for evaporation pyrolysis |
| CN113144642B (en) * | 2021-03-16 | 2024-03-26 | 北京紫黄科技有限公司 | Device for evaporation pyrolysis |
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