CN210356493U - A dehydration and fine dust removal device at the end of flue gas based on phase change - Google Patents
A dehydration and fine dust removal device at the end of flue gas based on phase change Download PDFInfo
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- CN210356493U CN210356493U CN201920683040.9U CN201920683040U CN210356493U CN 210356493 U CN210356493 U CN 210356493U CN 201920683040 U CN201920683040 U CN 201920683040U CN 210356493 U CN210356493 U CN 210356493U
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Abstract
本实用新型公开了一种基于相变的烟气末端脱水精除尘装置，涉及大气污染控制领域。本实用新型包括：水平设置的除尘箱体，除尘箱体内自烟气入口烟道方向向烟气出口烟道方向依次设有相变冷却区、喷雾冷却区和滤网除尘区；相变冷却区包括若干层热管换热层，每层热管换热层包括若干个相互平行排列的热管，且热管的蒸发段位于除尘箱体内部，热管的冷凝段位于除尘箱体外部；喷雾冷却区包括若干个雾化喷头；滤网除尘区包括若干个竖直设置的滤网除尘单元，滤网除尘单元包括支撑框架，该支撑框架上铺有滤网；以及沉淀池，该沉淀池位于除尘箱体底面开口的下方。本实用新型的目的在于低成本、低能耗条件下对工业烟气进一步除尘达到近零排放并消除白烟。
The utility model discloses a dehydration and fine dust-removing device at the end of flue gas based on phase transition, which relates to the field of air pollution control. The utility model comprises: a horizontally arranged dust removal box body, a phase change cooling area, a spray cooling area and a filter screen dust removal area are sequentially arranged in the dust removal box from the direction of the flue gas inlet flue to the direction of the flue gas outlet flue; the phase change cooling area It includes several heat pipe heat exchange layers, each heat pipe heat exchange layer includes several heat pipes arranged in parallel with each other, and the evaporation section of the heat pipe is located inside the dust removal box, and the condensation section of the heat pipe is located outside the dust removal box; the spray cooling area includes several Atomizing nozzle; the filter screen dust removal area includes several vertically arranged filter screen dust removal units, and the filter screen dust removal unit includes a support frame on which a filter screen is covered; and a sedimentation tank, the sedimentation tank is located at the bottom opening of the dust removal box. below. The purpose of the utility model is to further dedust the industrial flue gas to achieve near zero emission and eliminate white smoke under the conditions of low cost and low energy consumption.
Description
Technical Field
The utility model relates to an atmosphere pollution control field, more specifically say, relate to a terminal fine dust collector that dewaters of flue gas based on phase transition, be applicable to the treatment of industrial flue gas pollutants such as the terminal flue gas of industrial kiln especially converter steelmaking.
Background
In recent years, with the gradual increase of economic strength and the stricter environmental protection standard of China, the emission standard of main pollutants is required to be close to zero emission. According to the national standard 'emission standard of atmospheric pollutants for steelmaking industry GB 28664-2012', the emission concentration of primary smoke particles of the transfer furnace in the existing steelmaking enterprises is required to be 100mg/m3The newly-built enterprises and the enterprises with special emission limit value require that the emission concentration of the particulate matters in the primary flue gas of the converter is 50mg/m3The following. At present, the dust concentration of the discharged primary flue gas of steel making in large-scale iron and steel enterprises is about 50-30 mg/m3An interval. With the stricter environmental protection standards, the dust concentration in the primary flue gas emission is required to be further reduced until near zero emission is achieved.
At present, two main types of converter flue gas dust removal are provided, one type is a wet dust removal system (mainly OG method), flue gas is cooled and dedusted through spray water and a circumferential seam Venturi tube, and the flue gas is fully wetted by the method to cause the flue gas to contain saturated water; the other method is dry dedusting (mainly LT method), gas is ionized by a strong corona field formed by electrodes, dust, fog droplet particles and the like obtain electrons to be charged, and the particles are captured on a dust collecting plate under the combined action of electric field force, water mist collision, adsorption and coagulation, so that the aim of dedusting is fulfilled. The OG method can remove over 95% of dust content in the smoke gas, so that the dust content in the smoke gas is reduced to 30mg/m3The following; LT method can removeThe smoke dust amount is reduced to 10mg/m by removing 99 percent of smoke dust amount3And a large amount of water resources are saved. But the most widely used is OG method dust pelletizing system at present, and this patent is mainly directed at OG dust pelletizing system rear portion flue gas. Although the OG method has obvious effect at present, a large amount of micro-dust with the particle size of below 10 mu m still remains in the flue gas, and the temperature of the flue gas is about 80 ℃. At present, in the face of stricter and stricter environmental protection requirements, the requirement on dust content in flue gas is higher and higher, and the dust content in the flue gas is 30mg/m3The dust concentration of the coal is still higher, and a larger lifting space is provided. However, the prior OG method is difficult to realize further efficient removal of smoke dust, consumes a large amount of water resources and electric power resources, has high investment cost, is not beneficial to large-scale popularization and application, and causes the smoke to contain saturated water>300g/kg dry flue gas), white smoke (caused by flue gas condensation and water vapor separation) is generated after the dry flue gas is discharged out of a chimney, and the white smoke is harmless to the environment but influences the appearance of the city.
Related patents have been disclosed in the prior art for flue gas dust removal systems and methods, such as patent publication nos: CN 105107365 a, published: the invention is named as: the application discloses a composite phase change dedusting and desulfurizing process and a composite phase change dedusting and desulfurizing device for flue gas in a desulfurizing tower, wherein the flue gas enters the desulfurizing tower in a flue inlet under the cyclone action of a vortex phase changer and flows obliquely downwards, the vortex phase changer consists of a plurality of groups of atomizing nozzles arranged at four corners in a tangential manner, the atomizing nozzles can fully wet the flue gas and enable dust-containing liquid drops to collide and grow up, and the flue gas entering the desulfurizing tower is subjected to a desulfurizing spraying layer arranged above to remove most of dust-containing particles and SO2And the remaining wet flue gas and a small amount of smoke dust pass through the high-efficiency demister above, further remove moisture and micro dust and discharge the moisture and micro dust into the atmosphere. The dedusting and desulfurizing device of the application leads the flue gas to contain supersaturated water and remove the smoke dust by the way of water spray and strengthened collision, and removes SO by a desulfurizing spray layer2The dust removal and desulfurization efficiency is high, and the device is simple and has low investment. But the water saturation is increased through spraying, the water consumption is higher, clean water needs to be continuously supplemented, a large amount of electric energy is consumed, the dust removal mode is rough, fine dust removal is difficult to realize, and the dust remover is suitable for front-section dust removal and is not suitable for front-section dust removalDust removal at the end.
As disclosed in the patent publication: CN 206730770U, published: 12 months and 12 days in 2017, the invention and creation name is as follows: the utility model provides a wet flue gas desulfurization phase transition is congealed and is removed dust and fog device, this application discloses a wet flue gas desulfurization phase transition is congealed and is removed dust and fog device, and the flue gas gets into from the absorption tower middle part, and entry flue upper end sets up sprays the layer, sprays the layer upper end and sets gradually tube grid formula cooler and defroster to set gradually the cooler on tube grid formula cooler and defroster and wash nozzle with the defroster, the absorption tower lower extreme is the sedimentation tank. The dust removal defogging device in this application can effectively improve wet flue gas desulphurization unit's comprehensive dust removal effect, is showing the smoke and dust concentration in the reduction absorption tower export flue gas. However, the dedusting and demisting device has the major defects that the heat exchange medium of the tube grid heat exchanger adopts circulating water, water resources are consumed, the heat exchange efficiency is low, the size is large, and the weight of the absorption tower is heavy; the tube grid type heat exchanger and the demister are sequentially arranged and distributed with flushing nozzles, the equipment arrangement is complex, the overhaul is difficult, and fine dust removal is difficult to realize.
In conclusion, how to further remove dust from industrial flue gas to achieve near zero emission and achieve the purpose of eliminating white smoke is a technical problem to be solved urgently in the prior art.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
The utility model provides a terminal dehydration fine dust collector of flue gas based on phase transition, the utility model discloses a further remove dust to the industrial flue gas under low-cost, the low energy consumption condition and reach near zero release and eliminate white cigarette.
2. Technical scheme
In order to achieve the above purpose, the utility model provides a technical scheme does:
the utility model discloses a terminal dehydration fine dust collector of flue gas based on phase transition, include:
the dust removal box body is horizontally arranged, one end of the dust removal box body is communicated with a flue gas inlet flue, and the other end of the dust removal box body is communicated with a flue gas outlet flue; a phase change cooling area, a spray cooling area and a filter screen dedusting area are sequentially arranged in the dedusting box body from the direction of the flue gas inlet to the direction of the flue gas outlet; the phase change cooling area comprises a plurality of layers of heat pipe heat exchange layers, each layer of heat pipe heat exchange layer comprises a plurality of heat pipes which are arranged in parallel, evaporation sections of the heat pipes are positioned in the dust removal box body, and condensation sections of the heat pipes are positioned outside the dust removal box body; the spray cooling area comprises a plurality of atomizing spray heads; the filter screen dust removal area comprises a plurality of vertically arranged filter screen dust removal units, each filter screen dust removal unit comprises a support frame, and a filter screen is paved on each support frame; wherein, the bottom surface openings of the dedusting box body below the phase change cooling area, the spray cooling area and the filter screen dedusting area are arranged;
and the sedimentation tank is positioned below the opening at the bottom surface of the dedusting box body.
As a further improvement, the sedimentation tank is communicated with the filtering water tank, the sedimentation tank is provided with a filter frame with the communication position of the filtering water tank, and the filter frame is filled with a filter medium.
As a further improvement, the filter tank is communicated with the water delivery pipeline through a circulating water pump, the water delivery pipeline is communicated with the atomizing spray head in the spray cooling area, and the water delivery pipeline is provided with an adjusting valve.
As a further improvement, the bottom of the sedimentation tank is communicated with a plurality of funnels, and the bottoms of the funnels are provided with sealing plugs.
As a further improvement, the dust removal box body is provided with observation holes near the flue gas inlet flue and near the flue gas outlet flue.
As a further improvement, the opening part of the bottom surface of the dust removal box body is covered with a pore plate, and a plurality of water through holes are arranged on the pore plate.
As a further improvement, the utility model discloses all be equipped with the backup pad on the dust removal box lateral wall of filter screen dust removal district both sides, braced frame's both sides are equipped with the slot that supplies to correspond the backup pad embedding.
As a further improvement, the support frame is provided with extension plates on both sides thereof, and slots for inserting the extension plates are provided on the side walls of the dust removal box on both sides of the dust removal area of the filter screen.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with prior art, have following effect of showing:
(1) in the utility model, the flue gas after wet dedusting enters a phase-change cooling zone in the dedusting box body through a flue gas inlet flue, the flue gas is cooled and condensed into small droplets by taking the flue dust as a condensation core, and part of the droplets are condensed on the surface of a heat pipe evaporation section and gradually grow up and slide into a sedimentation tank below under the action of gravity; part of the liquid drops are brought into a spray cooling area by the dust-containing flue gas, the water mist sprayed by the atomizing nozzle further cools the flue gas and wets the smoke dust, and part of the liquid drops grow up and fall into a settling pond below under the action of gravity; the residual smoke-carrying part of liquid drops enter a filter screen dust removal area, collide with the filter screen, are condensed and grow up, and finally fall into a sedimentation tank below; and finally, the flue gas after fine dust removal and dehydration is discharged into the atmosphere from the flue gas outlet flue, so that the dust content and the water content of the flue gas are obviously reduced, and white smoke is eliminated.
(2) The utility model discloses a terminal smart dust collector that dewaters of flue gas based on phase transition can once only invest in, long service life, and the operation in-process realizes the flue gas cooling through natural forced air cooling, does not consume other power, does not consume the cooling water, has practiced thrift the cost, and realizes the dual effect of dust removal, dehydration.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a phase-change-based flue gas end dehydration fine dust removal device in the embodiment;
FIG. 2 is a schematic sectional view taken along A-A in FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along the line B-B in FIG. 1;
FIG. 4 is a schematic structural diagram of a screen dust removal unit in the embodiment;
FIG. 5 is a schematic view showing the arrangement of atomizing nozzles in the spray cooling zone in the embodiment;
FIG. 6 is a schematic view showing the arrangement of atomizing nozzles in the embodiment;
FIG. 7 is a schematic view showing the arrangement of atomizing nozzles in the embodiment;
fig. 8 is a schematic view of the installation of the screen dust removing unit in the embodiment.
The reference numerals in the schematic drawings illustrate: 1. a flue gas inlet flue; 2. a phase change cooling zone; 3. a spray cooling zone; 301. an atomizing spray head; 4. a filter screen dust removal area; 5. a flue gas outlet flue; 6. a sedimentation tank; 7. a funnel; 8. a sealing plug; 9. an observation hole; 10. a filter screen dust removal unit; 1001. a support frame; 1002. filtering with a screen; 11. a filter frame; 12. a filtering water tank; 13. a water circulating pump; 14. adjusting the valve; 15. an orifice plate; 16. a support plate; 17. an extension plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1
Referring to fig. 1-2, the flue gas terminal dehydration fine dust removal device based on phase transition of this embodiment includes:
the dust removal box body is horizontally arranged, one end of the dust removal box body is communicated with a flue gas inlet flue 1, and the other end of the dust removal box body is communicated with a flue gas outlet flue 5; a phase change cooling area 2, a spray cooling area 3 and a filter screen dedusting area 4 are sequentially arranged in the dedusting box body from the direction of the flue gas inlet flue 1 to the direction of the flue gas outlet flue 5; the phase change cooling area 2 comprises a plurality of layers of heat pipe heat exchange layers, each layer of heat pipe heat exchange layer comprises a plurality of heat pipes which are arranged in parallel, evaporation sections of the heat pipes are positioned in the dust removal box body, and condensation sections of the heat pipes are positioned outside the dust removal box body; the spray cooling zone 3 comprises a plurality of atomizing nozzles 301; the filter screen dust removal area 4 comprises a plurality of vertically arranged filter screen dust removal units 10, each filter screen dust removal unit 10 comprises a support frame 1001, and a filter screen 1002 is paved on each support frame 1001; wherein, the phase change cooling area 2, the spray cooling area 3 and the bottom opening of the dedusting box body below the filter screen dedusting area 4 are arranged;
the sedimentation tank 6 is positioned below the opening at the bottom surface of the dedusting box body; the sedimentation tank 6 is communicated with a filtering water tank 12, a filtering frame 11 is arranged at the communication position of the sedimentation tank 6 and the filtering water tank 12, and the filtering frame 11 is filled with filtering media (in the embodiment, filtering materials such as sand, filtering cloth and active carbon can be fully piled in the filtering frame 11); the filter water tank 12 is communicated with a water pipeline through a circulating water pump 13, the water pipeline is communicated with an atomizing nozzle 301 in the spray cooling area 3, and the water pipeline is provided with an adjusting valve 14.
In the embodiment, the flue gas subjected to wet dust removal enters a phase change cooling zone 2 in a dust removal box body through a flue gas inlet flue 1, the flue gas is cooled and condensed into small droplets by taking smoke dust as a condensation core, and part of the droplets are condensed on the surface of an evaporation section of a heat pipe and gradually grow up, and slide down to a lower sedimentation tank 6 under the action of gravity; part of the liquid drops are brought into the spray cooling area 3 by the dust-containing flue gas, the water mist sprayed by the atomizing nozzles 301 further cools the flue gas and wets the smoke dust, and part of the liquid drops grow up and fall into the lower sedimentation tank 6 under the action of gravity; the residual smoke-carrying part of the liquid drops enter a filter screen dust removal area 4, collide with a filter screen 1002, are condensed and grow up, and finally fall into a lower sedimentation tank 6; and finally, discharging the flue gas subjected to fine dust removal and dehydration into the atmosphere from a flue gas outlet flue 5, wherein the temperature of the discharged flue gas is about 50 ℃, the dust content and the water content are remarkably reduced, and white smoke is eliminated.
In this embodiment, the phase-change cooling area 2 includes a plurality of heat pipe heat exchange layers, each heat pipe heat exchange layer includes a plurality of heat pipes arranged in parallel to each other, and the evaporation zone of the heat pipe is located inside the dust removal box, and the condensation zone of the heat pipe is located outside the dust removal box, and when the flue gas passes through the phase-change cooling area 2, the heat is absorbed rapidly, and then the absorbed heat of the flue gas is dissipated to the outside of the dust removal box in time through the working medium in the heat pipe.
In this embodiment, the spray cooling area 3 includes a plurality of atomizer 301, the sedimentation tank 6 communicates with the filter water tank 12, the intercommunication department of sedimentation tank 6 and filter water tank 12 is equipped with filter frame 11, this filter frame 11 intussuseption is filled with filter media, filter water tank 12 communicates with water pipe through circulating water pump 13, water pipe communicates with atomizer 301 in the spray cooling area 3, install adjusting valve 14 on the water pipe, during the use, the moisture that falls into in the sedimentation tank 6 obtains certain cooling in the sedimentation tank 6, then flow into filter water tank 12 through the filtration of filter media in filter frame 11, at last carry again blowout in each atomizer 301 under circulating water pump 13's suction, the moisture in the flue gas is intercepted and can supply follow-up circulation to use, whole process need not additionally to add cooling water, water resource saving, the dust removal, dehydration efficiency has been improved.
The existing flue gas dust removal technology can reduce the amount of flue gas dust to 30mg/m3However, it is difficult to achieve further dust removal of the flue gas on the premise of low cost and low energy consumption, that is, near zero emission is achieved, and the dust-removed flue gas in the prior art contains a large amount of moisture, which easily causes white smoke emission. The purpose of this embodiment is to further remove dust to the industrial flue gas under the conditions of low cost and low energy consumption to reach near zero emission andthe white smoke is eliminated, specifically, in the embodiment, the phase change cooling area 2, the spray cooling area 3 and the filter screen dust removal area 4 are sequentially arranged in the dust removal box, the smoke is subjected to efficient dust removal and dehydration, and the smoke discharge temperature can be controlled, wherein the spray cooling area 3 can be used for load adjustment, when the smoke flow is large and the front phase change cooling area 2 is difficult to effectively cool and remove dust, the working load of the spray cooling area 3 can be increased, and the final cooling and dust removal effects are ensured; the fine dust collector of terminal dehydration of flue gas based on phase transition of this embodiment, but one-time investment, long service life realizes the flue gas cooling through natural forced air cooling in the operation process, does not consume other power, does not consume the cooling water, has practiced thrift the cost, and realizes the dual effect of dust removal, dehydration.
Example 2
The phase-change-based flue gas terminal dehydration fine dust removal device of the embodiment has a structure basically the same as that of the embodiment 2, and further comprises: the bottom of sedimentation tank 6 communicates has a plurality of funnel 7, and the bottom of funnel 7 is equipped with sealing plug 8 (in this embodiment specifically, sealing plug 8 is for pressing handle formula plug).
In this embodiment, the bottom intercommunication of sedimentation tank 6 has a plurality of funnel 7, and the bottom of funnel 7 is equipped with sealing plug 8, and when the water in the sedimentation tank 6 accumulated to a certain extent, the sealing plug 8 of opening each funnel 7 bottom that can be convenient discharged unnecessary ponding, wherein, the design of funnel 7 is favorable to the precipitate of smoke and dust among the sedimentation tank 6 to fall into wherein and is discharged because of the effect of subsiding.
Example 3
The phase-change-based flue gas terminal dehydration fine dust removal device of the embodiment has a structure basically the same as that of the embodiment 1, and further comprises: the dust removal box body is provided with observation holes 9 at the position close to the flue gas inlet flue 1 and the position close to the flue gas outlet flue 5 respectively.
In the embodiment, the dust removal box body is provided with the observation holes 9 at the positions close to the flue gas inlet flue 1 and the flue gas outlet flue 5 respectively, and the dust removal and whitening effects of the flue gas in the dust removal box body can be contrastingly observed and the dust removal box body can be regularly checked and maintained through the observation holes 9; when the equipment runs for a period of time, a small amount of adhesive exists on the surface of the heat pipe and the surface of the filter screen 1002, and high-pressure water can be introduced into the observation hole 9 to wash the heat pipe and the filter screen 1002.
Example 4
The phase-change-based flue gas terminal dehydration fine dust removal device of the embodiment has a structure basically the same as that of the embodiment 1, and further comprises: the opening of the bottom surface of the dust removal box body is covered with a pore plate 15, and a plurality of water through holes are formed in the pore plate 15.
In this embodiment, the opening on the bottom surface of the dust removing box body is covered with a pore plate 15, the pore plate 15 is provided with a plurality of water through holes, moisture falling from the inside of the dust removing box body can enter the sedimentation tank 6 along the water through holes for storage, and other bonded dust and particles are blocked on the pore plate 15 and can be cleaned regularly.
Example 5
Referring to fig. 3, the phase change based flue gas end dehydration fine dust removal device of the present embodiment has a structure substantially the same as that of embodiment 4, and further: supporting plates 16 are arranged on the side walls of the dust removing box body at the two sides of the filter screen dust removing area 4, and slots for embedding the corresponding supporting plates 16 are arranged at the two sides of the supporting frame 1001.
In this embodiment, all be equipped with backup pad 16 on the dust removal box lateral wall of filter screen dust removal district 4 both sides, braced frame 1001's both sides are equipped with the slot that supplies to correspond backup pad 16 embedding, and through backup pad 16 and the cooperation that corresponds the slot, braced frame 1001 can be convenient hang between the dust removal box lateral wall of filter screen dust removal district 4 both sides.
Example 6
Referring to fig. 8, the phase change based flue gas end dehydration fine dust removal device of the present embodiment has a structure substantially the same as that of embodiment 4, and further: extension plates 17 are disposed on two sides of the supporting frame 1001, and slots for inserting the extension plates 17 are disposed on the side walls of the dust removing box on two sides of the filter screen dust removing area 4.
In this embodiment, braced frame 1001's both sides are equipped with extension board 17, are equipped with the supply on the dust removal box lateral wall of filter screen dust removal district 4 both sides and correspond the slot that extension board 17 embedded, and through extension board 17 and the cooperation that corresponds the slot, braced frame 1001 can be convenient hang between the dust removal box lateral wall of filter screen dust removal district 4 both sides.
Example 7
The phase-change-based flue gas terminal dehydration fine dust removal device of the embodiment has a structure basically the same as that of the embodiment 5, and further comprises: the heat pipe is a negative pressure heat pipe, working media in the heat pipe can be water, acetic acid, methanol, acetone and the like, the phase change temperature (namely boiling point) of the working media in the heat pipe is controlled to be 45-70 ℃, and the mesh number of the filter screen 1002 is controlled to be 30-60 meshes; the evaporation section of the heat pipe is a light pipe, which is beneficial to the condensation, growth and falling of water vapor in the flue gas on the surface of the light pipe, and the condensation section of the heat pipe is a finned pipe, which strengthens the heat exchange with the external environment; the flue gas inlet flue 1 comprises a coil pipe section (namely a spiral pipeline system), the coil pipe section is positioned in the sedimentation tank 6, heat in the flue gas can be efficiently transferred to the stored water in the sedimentation tank 6 through the coil pipe section, the subsequent dedusting and whitening effects of the flue gas are improved, the sedimentation tank 6 is made of metal, and the outer surface of the sedimentation tank 6 is provided with a plurality of metal radiating fins; the surface of the evaporation section of the heat pipe is coated with a non-stick anti-corrosion coating (namely a polytetrafluoroethylene coating), the ultralow surface of the non-stick anti-corrosion coating can enable water vapor precipitated on the surface of the heat pipe to be beaded and fall rapidly under the action of gravity, film-shaped condensation deterioration heat transfer is avoided, water scales or adhesive substances cannot be formed on the surface of the heat pipe, the filter screen 1002 is made of polytetrafluoroethylene, small liquid drops are easily agglomerated on the surface of the filter screen 1002 to form liquid drops and fall rapidly under the action of gravity, a water film cannot be formed on the surface of the filter screen 1002 to increase smoke resistance, and the water scales or the adhesive substances cannot be formed on the surface of the filter screen 1002 to cause blockage, so that the above arrangement is beneficial to removal of the; in the phase change cooling area 2, the heat pipes on the heat exchange layers of the two adjacent layers of heat pipes are mutually vertical, and the heat exchange uniformity and efficiency of the whole phase change cooling area 2 are improved due to the orthogonal arrangement of the heat pipes, so that the dust removal and whitening effect is improved; referring to fig. 4, the supporting frame 1001 is an "n" shaped frame, the supporting frame 1001 is paved with a plurality of layers of filter screens 1002, the edges of the filter screens 1002 are fixed on the edges of the supporting frame 1001 through screws, the filter screens 1202 block and adsorb moisture and dust in the flue gas, so that the flue gas can be effectively dedusted and whitened, and the "n" shaped structure of the supporting frame 1001 enables liquid drops to smoothly slide off the filter screens 1202 from top to bottom; the flue gas inlet flue 1 is communicated with the phase change cooling area 2 through a gradually-expanding channel on the dust removal box body, the gradually-contracting channel on the dust removal box body is communicated with a flue gas outlet flue 5, the arrangement of the gradually-expanding channel enables the flue gas to be treated to be effectively dispersed into the phase change cooling area 2 for treatment, and the arrangement of the gradually-contracting channel is beneficial to the concentrated discharge of the treated flue gas; referring to fig. 5-6, the atomizer 301 is located at the top end of the interior of the dedusting box, and the sprayed water mist covers the spray cooling area 3 from top to bottom, which is beneficial to removing the micro-dust in the flue gas; or referring to fig. 7, the atomizing nozzles 301 are alternately arranged on two opposite side walls inside the dedusting box body, which is beneficial to the sprayed water mist to be uniformly diffused to the whole phase-change cooling area 2.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides a terminal dehydration fine dust collector of flue gas based on phase transition which characterized in that includes:
the dust removal device comprises a dust removal box body which is horizontally arranged, wherein one end of the dust removal box body is communicated with a flue gas inlet flue (1), and the other end of the dust removal box body is communicated with a flue gas outlet flue (5); a phase change cooling area (2), a spray cooling area (3) and a filter screen dedusting area (4) are sequentially arranged in the dedusting box body from the direction of the flue gas inlet flue (1) to the direction of the flue gas outlet flue (5); the phase change cooling area (2) comprises a plurality of layers of heat pipe heat exchange layers, each layer of heat pipe heat exchange layer comprises a plurality of heat pipes which are arranged in parallel, evaporation sections of the heat pipes are positioned in the dust removal box body, and condensation sections of the heat pipes are positioned outside the dust removal box body; the spray cooling area (3) comprises a plurality of atomizing nozzles (301); the filter screen dust removal area (4) comprises a plurality of vertically arranged filter screen dust removal units (10), each filter screen dust removal unit (10) comprises a supporting frame (1001), and a filter screen (1002) is laid on each supporting frame (1001); wherein, the phase change cooling area (2), the spray cooling area (3) and the opening at the bottom of the dedusting box body below the filter screen dedusting area (4) are arranged;
and the sedimentation tank (6), the sedimentation tank (6) is positioned below the opening on the bottom surface of the dedusting box body.
2. The phase-change-based flue gas end dehydration fine dust removal device according to claim 1, characterized in that: the sedimentation tank (6) is communicated with the filtering water tank (12), a filtering frame (11) is arranged at the communication position of the sedimentation tank (6) and the filtering water tank (12), and a filtering medium is filled in the filtering frame (11).
3. The phase-change-based flue gas end dehydration fine dust removal device according to claim 2, characterized in that: the filter tank (12) is communicated with a water pipeline through a circulating water pump (13), the water pipeline is communicated with an atomizing nozzle (301) in the spray cooling area (3), and an adjusting valve (14) is installed on the water pipeline.
4. The phase-change-based flue gas end dehydration fine dust removal device according to claim 1, characterized in that: the bottom of sedimentation tank (6) intercommunication has a plurality of funnel (7), the bottom of funnel (7) is equipped with sealing plug (8).
5. The phase-change-based flue gas end dehydration fine dust removal device according to claim 1, characterized in that: and observation holes (9) are respectively arranged at the position, close to the flue gas inlet (1), and the position, close to the flue gas outlet (5), on the dust removal box body.
6. The phase-change-based flue gas end dehydration fine dust removal device according to claim 1, characterized in that: the opening of the bottom surface of the dust removal box body is covered with a pore plate (15), and the pore plate (15) is provided with a plurality of limber holes.
7. The phase change based flue gas end dehydration fine dust removal device according to any one of claims 1-6, characterized in that: all be equipped with backup pad (16) on the dust removal box lateral wall of filter screen dust removal district (4) both sides, the both sides of braced frame (1001) are equipped with the slot that supplies to correspond backup pad (16) embedding.
8. The phase change based flue gas end dehydration fine dust removal device according to any one of claims 1-6, characterized in that: the both sides of braced frame (1001) are equipped with extension board (17), are equipped with the slot that supplies to correspond extension board (17) embedding on the dust removal box lateral wall of filter screen dust removal district (4) both sides.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920683040.9U CN210356493U (en) | 2019-05-13 | 2019-05-13 | A dehydration and fine dust removal device at the end of flue gas based on phase change |
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| CN201920683040.9U CN210356493U (en) | 2019-05-13 | 2019-05-13 | A dehydration and fine dust removal device at the end of flue gas based on phase change |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110090519A (en) * | 2019-05-13 | 2019-08-06 | 安徽工业大学 | A kind of flue gas end dehydration refined dedusting device based on phase transformation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110090519A (en) * | 2019-05-13 | 2019-08-06 | 安徽工业大学 | A kind of flue gas end dehydration refined dedusting device based on phase transformation |
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